Iec 60153 1 2016

I E C 601 53-1
®

I N TE R N ATI ON AL
STAN DAR D

N OR M E
I N TE R N ATI ON ALE

H o l l ow m etal l i c waveg u i d es –
Part 1 : G en eral req u i rem en ts an d m easu ri n g m eth od s

G u i d es d ' o n d es m étal l i q u es creu x –

IEC 601 53-1 :201 6-05(en-fr)

Parti e 1 : Exi g en ces g én éral es et m éth od es d e m esu re

Edition 2.0 201 6-05


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I EC 601 53-1
®

Edition 2.0 201 6-05

I N TER N ATI ON AL
STAN DAR D

N OR M E
I N TER N ATI ON ALE

H ol l ow m etal l i c waveg u i d es –
Part 1 : G en eral req u i rem en ts an d m easu ri n g m eth od s

G u i d es d ' on d es m étal l i q u es creu x –
Parti e 1 : Exi g en ces g én éral es et m éth o d es d e m esu re

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.1 20.1 0

ISBN 978-2-8322-3382-5

Warn i n g ! M ake su re th at you obtai n ed th i s pu bl i cati on from an au th ori zed d i stri bu tor.
Atten ti on ! Veu i l l ez vou s assu rer q u e vou s avez o bten u cette pu bl i cati on vi a u n d i stri bu teu r ag réé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

–2–

I EC 601 53-1 :201 6 © I EC 201 6

CONTENTS
FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
I N TRODU CTI ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
N ormati ve references. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Terms an d defin i tions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4
Type desig nation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4. 1
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4. 2
Desig nation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5
Standard atm ospheric condi ti ons for testin g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6
Visu al inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7
M ech an ical requ iremen ts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7. 1
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7. 1 . 1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7. 1 . 2
Ordinary rectang u lar wavegu ides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7. 1 . 3
Rectang ul arity of cross-section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0
7. 1 . 4
Fl at rectangu lar waveg u ides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0
7. 1 . 5
Circu lar waveg u ides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1
7. 2
Other mechanical requ irements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1
7. 2. 1
Bow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1
7. 2. 2
Twist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2
7. 2. 3
Su rface rou g hness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2
7. 2. 4
I n tern al stress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2
8
Electrical tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2
8. 1
Atten uation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2
8. 2
I n tern al refl ections from irreg u lari ty of in ternal dimensi ons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3
9
Addi tional tests – Gas tig h tness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4


I EC 601 53-1 :201 6 © I EC 201 6

–3–

I NTERNATI ONAL ELECTROTECHN I CAL COMMI SSI ON
____________

HOLLOW METALLIC WAVEGUIDES –
Part 1 : General requirements and measuring methods
FOREWORD
1 ) Th e I n tern ati on al El ectrotech n i cal Com m i ssi on (I EC) i s a worl d wi d e org an i zati on for stan dard i zati on com pri si n g
al l n ati on al el ectrotech n i cal com m i ttees (I EC N ati on al Com m i ttees) . Th e obj ect of I EC i s to prom ote
i n tern ati on al co-operati on on al l q u esti on s con cern i n g stan dard i zati on i n th e el ectri cal an d el ectron i c fi el ds. To
th i s en d an d i n ad di ti on to oth er acti vi ti es, I EC pu bl i sh es I n tern ati on al Stan d ards, Tech n i cal Speci fi cati on s,
Tech n i cal Reports, Pu bl i cl y Avai l abl e Speci fi cati on s (PAS) an d G u i d es (h ereafter referred to as “I EC
Pu bl i cati on (s) ”) . Th ei r preparati on i s en tru sted to tech n i cal com m i ttees; an y I EC N ati on al Com m i ttee i n terested
i n th e su bj ect d eal t wi th m ay parti ci pate i n th i s preparatory work. I n tern ati on al , g overn m en tal an d n on g overn m en tal org an i zati on s l i ai si n g wi th th e I EC al so parti ci pate i n th i s preparati on . I EC col l aborates cl osel y
wi th th e I n tern ati on al Org an i zati on for Stan d ard i zati on (I SO) i n accordan ce wi th con d i ti on s d eterm i n ed by
ag reem en t between th e two org an i zati on s.
2) Th e form al deci si on s or ag reem en ts of I EC on tech n i cal m atters express, as n earl y as possi bl e, an i n tern ati on al
con sen su s of opi n i on on th e rel evan t su bj ects si n ce each tech n i cal com m i ttee h as represen tati on from al l
i n terested I EC N ati on al Com m i ttees.
3) I EC Pu bl i cati on s h ave th e form of recom m en d ati on s for i n tern ati on al u se an d are accepted by I EC N ati on al
Com m i ttees i n th at sen se. Wh i l e al l reason abl e efforts are m ad e to en su re th at th e tech n i cal con ten t of I EC
Pu bl i cati on s i s accu rate, I EC can n ot be h el d respon si bl e for th e way i n wh i ch th ey are u sed or for an y
m i si n terpretati on by an y en d u ser.
4) I n ord er to prom ote i n tern ati on al u n i form i ty, I EC N ati on al Com m i ttees u n d ertake to appl y I EC Pu bl i cati on s
tran sparen tl y to th e m axi m u m exten t possi bl e i n th ei r n ati on al an d reg i on al pu bl i cati on s. An y di verg en ce
between an y I EC Pu bl i cati on an d th e correspon d i n g n ati on al or reg i on al pu bl i cati on sh al l be cl earl y i n di cated i n
th e l atter.
5) I EC i tsel f d oes n ot provi d e an y attestati on of con form i ty. I n d epen d en t certi fi cati on bodi es provi d e con form i ty

assessm en t servi ces an d , i n som e areas, access to I EC m arks of con form i ty. I EC i s n ot respon si bl e for an y
servi ces carri ed ou t by i n d epen d en t certi fi cati on bodi es.
6) Al l u sers sh ou l d en su re th at th ey h ave th e l atest edi ti on of th i s pu bl i cati on .
7) N o l i abi l i ty sh al l attach to I E C or i ts di rectors, em pl oyees, servan ts or ag en ts i n cl u di n g i n d i vi du al experts an d
m em bers of i ts tech n i cal com m i ttees an d I EC N ati on al Com m i ttees for an y person al i n j u ry, property d am ag e or
oth er d am ag e of an y n atu re wh atsoever, wh eth er di rect or i n d i rect, or for costs (i n cl u d i n g l eg al fees) an d
expen ses ari si n g ou t of th e pu bl i cati on , u se of, or rel i an ce u pon , th i s I EC Pu bl i cati on or an y oth er I EC
Pu bl i cati on s.
8) Atten ti on i s d rawn to th e N orm ati ve referen ces ci ted i n th i s pu bl i cati on . U se of th e referen ced pu bl i cati on s i s
i n di spen sabl e for th e correct appl i cati on of th i s pu bl i cati on .
9) Atten ti on i s d rawn to th e possi bi l i ty th at som e of th e el em en ts of th i s I EC Pu bl i cati on m ay be th e su bj ect of
paten t ri g h ts. I EC sh al l n ot be h el d respon si bl e for i d en ti fyi n g an y or al l su ch paten t ri g h ts.

I n tern ati onal Standard I EC 601 53-1 has been prepared by su bcommi ttee 46F: RF an d
microwave passi ve components, of I EC technical comm ittee 46: Cabl es, wires, wavegu ides,
RF con nectors, RF an d m icrowave passive componen ts and accessories.
Th is second editi on cancels and replaces th e first edition pu blished i n 1 964. This edition
consti tu tes a technical revisi on .
Th is edi tion inclu des th e followin g sig ni fican t technical chang es wi th respect to the previous
edition :
a) expan d the operati on frequency ran g e;
b) revise the equ ation of attenuation.


–4–

I EC 601 53-1 :201 6 © I EC 201 6

The text of th is standard is based on the foll owi ng docu men ts:
CDV

Report on voti n g

46F/302/CDV

46F/31 6/RVC

Fu ll informati on on the votin g for the approval of this standard can be fou nd in the report on
votin g i ndicated i n the above table.
Th is pu blication has been drafted in accordance wi th the I SO/I EC Di recti ves, Part 2.
I t i s to be read i n con ju nction wi th I EC 601 54: Flang es for waveg u ides.
A l ist of all parts in the I EC 601 53 series, publ ish ed u n der the g en eral title
waveguides, can be found on th e I EC websi te.

Hollow metallic

The com mi ttee h as decided that th e con ten ts of th is pu bl icati on wi ll remain u nchan ged u n ti l
th e stabil ity date in dicated on th e I EC websi te u nder "h ttp://webstore. iec. ch " in the data
related to the specific publ ication . At th is date, the pu blication wil l be
•

recon firmed,

•

withdrawn ,

•

replaced by a revised edi ti on , or

•

amended.


I EC 601 53-1 :201 6 © I EC 201 6

–5–

I NTRODUCTI ON
Th is I n ternati onal Standard relates to strai gh t h ollow metall ic tu bi ng for u se as waveg u ides in
electron ic equ ipm ent. I n recen t years, the operati on frequ ency of waveg u ide com pon en ts and
systems has been extended to 1 TH z and above. H owever, th e first edition of the I EC 601 53
series of stan dards on ly specified the apertu re di mensions for ordinary rectang u lar wavegu ide
for frequenci es u p to 325 GH z. I n addition, th e first edi tion of the I EC 601 53 series of
standards, datin g from the 1 960's, does not meet th e needs of the cu rren t applicati ons. This
n ew edi tion of I EC 601 53-1 addresses these two issu es by extendin g the frequ ency coverag e
to 3 300 GH z and by addressing current applicati ons for th is type of waveg u ide.
Th is standard takes in to accou n t I EC 60068 when necessary.
Wh en there i s a di fference between th e g en eral requ iremen ts an d th e relevant specification
sh eet, th e l atter prevai ls.


–6–

I EC 601 53-1 :201 6 © I EC 201 6

HOLLOW METALLIC WAVEGUIDES –
Part 1 : General requirements and measuring methods

1

Scope

Th is part of I EC 601 53 speci fies strai gh t holl ow metal lic tu bi ng for use as waveg u i des in
electronic equ i pm ent.
I t covers:
a) th e detai ls necessary to ensure compati bil ity an d, as far as essen ti al , in terchan g eabil ity;
b) test meth ods;
c) u ni form requi remen ts for th e electrical an d m echan ical properti es.
I t shou ld be noted that no recommen dations are m ade for the materi als to be used for
wavegu ides. The ch oice of materi al is ag reed between custom er and man u factu rer.

2 Normative references
The following docu men ts, in wh ole or in part, are n orm ati vel y referenced in this docu m en t and
are indispensabl e for i ts application . For dated references, on ly the edition cited appli es. For
u ndated references, th e latest edition of th e referenced docu men t (inclu din g an y
amendm ents) appl ies.
I EC 60050 (all
parts),
< />
International

Electrotechnical

Vocabulary

(available

at

I EC 60068 (al l parts) , Environmental testing
I EC 601 54, Flanges for waveguides
I EC 60261 , Sealing test for pressurized waveguide tubing and assemblies

3 Terms and definitions
For the purposes of th is docu men t, th e terms and defi n itions g iven in I EC 60050, as wel l as
th e foll owing appl y.

3.1
type test

complete series of tests to be carried ou t on a n u mber of speci mens represen tati ve of the
type, with the object of determi ni ng wh ether a particul ar man u factu rer can be considered to
be able to produ ce products m eeting th e specification

3.2
type approval

decision by the proper au thority (the custom er h imsel f or h is nom in ee) th at a particular
man u facturer can be considered to be able to produce i n reasonabl e qu an ti ties th e type
meeting the speci fication


I EC 601 53-1 :201 6 © I EC 201 6

–7–

3.3

acceptance tests

tests carri ed ou t to determ i ne the acceptabi li ty of a consi g nmen t on the basis of an ag reement
between customer and manu facturer
N ote 1 to en try:

Th e ag reem en t sh al l cover:

a)

th e sam pl e si ze,

b)

th e sel ecti on of tests,

c)

th e exten t to wh i ch th e speci m en s sh al l con form to th e requ i rem en ts for th e sel ected tests of th e speci fi cati on .

N ote 2 to en try:
tests.

I n cases of di verg en t test resu l ts, th e I EC stan d ard test m eth ods sh al l be u sed for acceptan ce

As th ese recom m en d ati on s on l y cover type tests, th ese defi n i ti on s are i n cl u d ed on l y for bri ef i n form ati on of testi n g
speci fi cati on .

3.4
factory tests

tests carried ou t by th e man u facturer to veri fy that their products meet the speci fication

4

Type designation

4.1

Type

Type of products com prises si mi lar desig n featu res man u factu red by the same techniqu es and
falling wi th in th e manu factu rer's u su al rang e of ratin g s for these produ cts.
N OTE 1

M ou n ti n g accessori es are i g n ored , provi d ed th ey h ave n o si g n i fi can t effect on th e test resu l ts.

N OTE 2

Rati n g s cover th e com bi n ati on of:
a) el ectri cal rati n g s,
b) si zes,
c) en vi ron m en tal g rou p.

N OTE 3

4.2

Th e l i m i ts of th e ran g e of rati n g s sh al l be ag reed between cu stom er an d m an u factu rer.

Desig nation

The reference indication for waveg ui des covered by th is speci fication shal l comprise the
following :
a)
b)
c)
d)

th e nu mber of the I EC pu bl ication (601 53) ;
th e l etters “I EC";
a h yph en ;
a letter i ndicatin g the shape of the inside cross-section of th e wavegu ide:
R = ordinary rectan g u lar (with a ratio of heigh t to width of approxi matel y 1 :2)
F = flat rectangu lar
C = circu lar.
For oth er types of waveg u ides this letter indication shall be in accordance with the
relevan t speci ficati on sheets;
e) a n u mber ch aracterizin g a particu lar size of waveg u ide. This nu mber indicates a
frequ ency characteristic of the waveg u ide;
f) wh ere n ecessary, an addi ti onal indicati on as indicated on the rel evant specification sheets.
The letter “P" shall be used to indicate close tolerance types.
Exam pl e:


–8–

I EC 601 53-1 :201 6 © I EC 201 6

"601 53 I E C-R 1 00" d en otes a 22, 860 m m × 1 0, 1 60 m m (0, 900 i n × 0, 400 i n ) ordi n ary rectan g u l ar waveg u i d e wi th a

cen tre frequ en cy of approxi m atel y 1 0 G H z i n th e dom i n an t m od e.

5 Standard atmospheric conditions for testing
U nless otherwise speci fi ed, all tests shall be carried ou t under standard atm ospheric
conditions for testin g as speci fied i n I EC 60068.
Before the measuremen ts are m ade, th e waveg u ide shall be stored at the m easuring
temperatu re for a ti me su fficien t to al low the en tire waveg u ide to reach this temperatu re.
Wh en measu rem en ts are m ade at a temperature other than the speci fi ed temperatu re, the
resu l ts shall, wh ere n ecessary, be corrected to the specified temperature. The ambien t
temperatu re at which the m easu remen ts are made shall be stated in th e test report.
As these recomm endations onl y cover type tests, these defin itions are inclu ded on ly for bri ef
in formation of testi ng con di tions.

6 Visual inspection
The wavegu ides shal l be u ni form in com position an d in wal l thickness and shall be straig h t
and smooth from end to end. There shal l be n o bu rrs, cracks, die marks, ch atter marks, dirt,
g rease or oth er irreg u larities of th e su rface.
Both in ner an d ou ter su rface shall have a clean brig h t appearance in accordance with g ood
cu rren t practice.

7 Mechanical requirements
7.1 Dimensions
7.1 .1 General
The dimensions of the waveg u ides an d th e tolerances th ereon shall be in accordance with the
valu es g iven on the relevan t specifi cation sheets. Dimensi ons and tolerance sh all be gi ven
both in mill im etres and i nches, indi cating in wh ich system of un i ts the dimensions were
ori g inated.
I n dependen t of th e system of u ni ts, the nomi nal dimensions of th e inside and ou tsi de cross
section sh all be g i ven in su ch a way that th e valu es, the first dig it of wh ich is 3 to 9, sh ou ld be
g i ven by 4 si g ni fican t fi gu res and those with first dig i ts being 1 or 2 by 5 sig n ifican t fig u res. I n

pri nci ple, i nternal n om inal dimensions sh all be rou nded off to th e n earest 0, 001 m m or
0, 0001 i n and external dim ensions shou l d be rou nded off to the nearest 0, 01 m m or 0, 001 in .
N OTE Wh en th ese ru l es are appl i ed, a j u n cti on of two h ypoth eti cal waveg u i d es each wi th a n om i n al val u e i n on e
of th e system s wi l l prod u ce a cal cu l ated refl ecti on of l ess th an –70 d B for ord i n ary rectan g u l ar waveg u i des, except
for th e sm al l er types.


I EC 601 53-1 :201 6 © I EC 201 6

–9–

U nless otherwise speci fi ed, the following dim ensions sh all be gi ven on th e relevan t
specification sh eets:
a)
b)
c)
d)
e)
f)
g)
h)
i)

n om in al di mensions of inside cross-section ,
tolerances on inside dimensi ons,
m aximu m radiu s of inside corn er for rectan g u lar waveg u ides,
n om inal wall thickn ess,
m aximu m eccen trici ty,
n om in al di mensi ons of ou tside cross-secti on,
tolerance on ou tsi de di mensions,

m inimu m and maxim um radius of ou tside corn er for rectangu lar waveg u ides,
elli ptici ty for circu lar waveg u ides.

7.1 .2 Ordinary rectangular waveguides
7.1 .2.1
Inside dimensions
The standard ratio between heigh t and width of th e inside cross-section is 1 :2. (For some
sizes the rati o between hei gh t and width differs somewh at from th is ratio. These sizes were
ch osen becau se th ey were already extensively u sed) . I f closer tol erances are n ecessary, a
rati o of ± 1 /1 000 is recom mended.
The tolerances both on width and heig h t are g iven on the rel evan t specifi cation sheet. I nside
corner radi i sh all be as gi ven on th e relevan t specificati on sh eet.

7.1 .2.2

Wall thickness

The n om in al wal l thickness is defined as half th e difference between n om inal ou tside and
inside di mensions in the orig inal system of uni ts. I ts valu e sh al l be g iven on the relevan t
specification sh eets for in form ation .
After con version from inch es in to mil l im etres, the valu es shall be rou nded to the n earest
0, 005 mm .
After con version from mi ll im etres in to inch es, the valu es shall be rou nded to the n earest
0, 001 in .

7.1 .2.3

Outside dimensions

Nom inal valu es of h ei ght and width shal l be as g iven on the relevan t specificati on sh eet.

No ou tside dimensions h ave been specified for some of th e l arg est sizes becau se a vari ety of
man u factu ring tech niques are u sed.
The ou tside corner radiu s ( r2 ) shall be with in the following l imits:

r2 m in = 0, 5 d
r2 m ax = r2 m in + 0, 5 mm (0, 02 in )
where d is the nom inal wal l th ickness.


– 10 –
7. 1 . 3

7. 1 . 3. 1

I EC 601 53-1 :201 6 © I EC 201 6

R ectan g u l ari ty o f cro ss -sect i o n

G en e ral

The dim ensional requ irem ents in the I EC 601 53 seri es do not con trol the rectang ul arity of the
cross-section .
The allowed devi ati on from rectang ul ari ty is defin ed by the requ iremen t th at the shape of the
inside (ou tside) cross-section shal l be su ch that it is possible to inscribe the actual i n ternal
(extern al ) cross-section in the area between the speci fied m aximu m an d minimu m i n ternal
(extern al ) rectang les. A su itabl e m eth od for checking rectangu larity is g i ven below by way of
exam pl e.
Calliper or th ree dimensi on al coordin ate measuri ng mach ine (3DCM M) or si milar dimensional
m easurement equ ipment sh ou ld be u sed in th e cross-section al di mensi ons.
7. 1 . 3. 2

For i n s i d e cros s-secti o n

I n drawing the block throug h the waveg u ide, precau ti on sh all be taken to keep it accu rately
n orm al to the waveg ui de axis.
For the dimensions of the block, the fol lowing appl ies:
a) n om in al dimensi ons of cross-section : nomi nal wavegu ide apertu re size m inu s 1 , 1 times
th e tolerance,
b) tolerance on nom inal dimensions of cross-section : + 0, –0, 1 ti mes tolerance on wavegu ide
apertu re,
c) perpendicu lari ty of the si des: not deviating by more th an 3 × 1 0 –4 radian,
d) l en g th 0, 2 tim es in ternal width of the waveg u ide.
7. 1 . 3. 3

Fo r o u ts i d e c ro ss - s ec t i o n

For the dimensions of the aperture, th e foll owing appli es:
a) n om in al dimensions of cross-section : n om inal waveg u ide outside cross-section plu s
1 , 1 ti mes the tolerance,
b) tolerance on n omi nal dim ensions of cross-section : –0, + 0, 1 ti m es tolerance on waveg u ide
ou tsi de cross-section ,
c) perpendicu lari ty of the sides: not deviating by more th an 3 × 1 0 –4 radian.
7. 1 . 4

7. 1 . 4. 1

F l a t r e c t a n g u l a r w a ve g u i d e s

I n si d e d i m en si on s

The i nsi de wi dth of flat rectang ul ar wavegu ides sh all , except for special types, be equ al to the
inside width of corresponding sizes of ordinary rectang u lar waveg u ides.
The standard ratio between h eig h t an d width of th e inside cross-section is 1 :8, 33, but for the
sm all er sizes a fixed heig h t is recomm en ded.
The tolerances both on heig h t an d width shall be as g iven on th e relevan t specification sh eet.
Fu rth er 1 :4 is recom mended as an intermediate between the standard ratios of 1 :2 and 1 :8, 33.
Wh en i t is necessary to deviate from a standard dimension , it i s recommended th at th e valu e
be based on th e g eom etri cal m ean between two consecu tive standardized di mensions.


I EC 601 53-1 :201 6 © I EC 201 6

7.1 .4.2

– 11 –

Wall thickness

The same ru l es sh all be fol lowed as for ordin ary rectang u lar wavegu ides.

7.1 .4.3

Eccentricity

The same ru l es sh all be fol lowed as for ordin ary rectang u lar wavegu ides.

7.1 .4.4

Outside dimensions

The tolerances both on width and heig h t shall be as g i ven on th e rel evan t speci fication sheet.
I f n ecessary, ou tsi de dim ension shou l d be specifi ed for waveg u ides operating at frequ enci es
over 330 GH z.

7.1 .4.5

Rectangularity of cross-section

The same ru les sh al l be followed as for ordinary rectang ul ar waveg u ides.

7.1 .5 Circular waveguides
7.1 .5.1
Inside dimensions
a) Diameter
The tol erances on diameter shal l be as g i ven on th e relevan t speci fication sh eet.
b) El l ipticity
The ell ipticity “ E" is defined as E = ( Dm ax – Dm i n ) /Dn om
where
Dn om is the nom i nal inside diam eter;
Dm ax is the larg est m easu red inside dim ension ;
Dm i n is the smallest m easu red i nside di mension .
The ell iptici ty sh al l n ot exceed th e requi rem en ts g i ven on the rel evant speci fication sh eet.

7.1 .5.2

Wall thickness

For wal l th ickn ess, the same rul es sh al l be applied as for ordi nary rectang u lar wavegu ides.

7.1 .5.3

Eccentricity

For eccen trici ty, the same ru les sh al l be applied as for ordinary rectang u lar waveg u ides.

7.1 .5.4

Outside dimensions

The nominal val u es for ou tsi de dimensi ons and th e tolerances thereon shall be as g i ven on
the relevan t speci fication sh eet.
N o ou tside dimensions h ave been speci fied for some of th e l argest sizes becau se a vari ety of
m anu factu ring tech niqu es are used.

7.2 Other mechanical requirements
7.2.1 Bow
Bow is defined as the maxi mu m deviation of the actu al axis of the waveg u i de from a strai g ht
l ine of speci fi ed leng th connectin g two poin ts on th at axis.


– 12 –

I EC 601 53-1 :201 6 © I EC 201 6

The bow is measured on th e external su rface of the wavegu ide. For a len g th of 1 0 tim es the
i nternal width , the extern al bow shal l not exceed 1 0 ti mes th e speci fied tolerance on the
i nternal width .
For a leng th of 50 tim es the in ternal width , the extern al bow sh al l not exceed 40 tim es the
speci fied tolerance on the in tern al width .
For the determination of the external bow, th e wavegu ide shall be so posi ti oned th at g ravi ty

does n ot tend to affect the am oun t of bow.

7.2.2

Twist

Twist is defined as th e rotati on, over a specified len g th , of the cross-secti on of the wavegu ide
arou nd the long i tudinal axis.
The rate of twist shal l not exceed:
•

0, 50 per m etre for waveg u ides wi th an internal width equ al or l arg er th an 1 00 m m ;

•

0, 50 per leng th of waveg u i de equ al to ten tim es the in ternal wi dth when the latter is less
th an 1 00 mm .

Over a len gth equ al to 50 times th e in ternal width of th e waveg u ide, the accu mu lated twist
sh al l n ot exceed 2°. Th e directi on of twist shoul d n ot be system atic i n a batch of waveg u ides.

7.2.3

Surface roughness

U n der consideration .

7.2.4

Internal stress

The waveg u ide tu be shall be cu t by m eans of a saw. The cu ttin g process shal l be carefu l ly
con trolled so as to avoid distorti on arisin g from the cu tti ng and the use of a fine hig h-speed
saw is recom mended. After cu tting , th e cross-section of th e waveg u ide tu be shal l sti ll be
wi th in the specified tolerances.

8

Electrical tests

8.1

Attenuation

The attenu ati on of a su itabl e len g th of waveg u ide tu be shall be measu red at a frequ ency of
1 , 5 tim es th e cu t-off frequ ency for rectang u l ar waveg u ides and of 1 , 2 times th e cu t-off
frequ ency in th e TE 1 1 mode for circu lar waveg u ides. The accu racy of the m easu remen t shal l
be ± 1 0 % of the requ ired valu e in dB.
U n less otherwise speci fied, the attenu ati on sh all not exceed 1 , 3 ti mes the valu e calcu lated for
th e ideal su rface and the standard resisti vity of the materi al concerned.
Calcu lations of atten uation shall be based on the fol lowing formu lae which do n ot apply for
th in l y plated su rfaces:
Rectang ul ar waveg u ides (TE 1 0 mode) :


I EC 601 53-1 :201 6 © I EC 201 6

a = 2 ,3272

– 13 –

 f

 f
 c

1

σ0
σ

b a

f
fc

2


2b
 +

a

 f

 f
 c







dB/m

2

(1 )

1

wh ere
σ

is the electrical condu ctivi ty of inside n on-mag neti c wall metal;

σ 0 is the electrical condu ctivi ty of in ternational an nealed copper standard

= 5, 80 × 1 0 7 siemens/metre;
a i s the inside width in m il l im etres;
b i s the inside hei gh t in mi llim etres;
fc is th e cu t-off frequ ency for TE 1 0 mode = 1 49, 8/ a GH z at 1 01 3, 25 hPa, 23 °C and relati ve
h um idi ty = 50 % in air;
f is the frequ ency at wh ich the attenu ation is to be calcu lated.
Circu lar waveg u ides (TE 1 1 mode) :

a = 5 ,040

σ0
σ

f
1 + 0 ,41 85 
 fc

1

3

D

2

f
fc

 f

 f
 c






2







2

dB/m

(2)

1

wh ere
σ

is the electrical condu ctivi ty of inside n on-mag neti c wall metal;

σ 0 is the electrical condu ctivi ty of in ternational an nealed copper standard

= 5, 80 × 1 0 7 siemens/metre;
D i s the in ner diameter in m i l li metres;
fc is the cu t-off frequ ency for TE 1 1 mode =1 75, 646/D GH z
at 1 01 3, 25 hPa, 23 °C and rel ati ve h u m idity = 50 % in air;
f i s the frequ ency at wh ich the attenu ation is to be calcu lated.
8. 2

I n t ern a l re fl e c t i o n s f ro m i rre g u l a ri t y o f i n t e rn a l

d i m en si on s

The object of th is test is to determ ine th e presence of periodic vari ations of in ternal

di mensions along the leng th of the waveg u ide wh ich wou ld cau se u nacceptable in tern al
reflecti ons.
I rreg u larities in the in ternal dimensions of th e wavegu ide along its l eng th sh ou ld be measu red
at the frequencies speci fied i n 8. 1 .
A n on-refl ecti ng termi nati on shal l be m oved throu g h th e waveg u ide under test. I t is essential
th at the m ovabl e termin ation sh all be desig n ed to ensure that i t wil l not smooth ou t the
i rreg u lari ties.
The incremen tal refl ections due to irreg u larities m ay be detected ei ther by a fi xed probe with
a suppressed zero in dicatin g i nstrument or by a wavegu ide bri dg e method.
The m easu ring inaccu racy shal l not exceed 20 % of the requi red valu e for th e reflection
coefficien t.


– 14 –

I EC 601 53-1 :201 6 © I EC 201 6

9 Additional tests – Gas tightness
Th is I EC 60261 test will onl y be performed when materials or processes of constru ctions are
used which can be expected not to be su fficien tly g asti gh t.

___________



– 16 –

I EC 601 53-1 :201 6 © I EC 201 6

SOMMAI RE

AVAN T-PROPOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7
I N TRODU CTI ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 9
1
Domain e d'appl ication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2
Références n orm atives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3
Termes et défin itions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4
Désig nation de type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4. 1
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4. 2
Désig nation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5
Condi ti ons atm osphériqu es normales d'essais . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6
Con trôle visu el . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7
Exi g ences mécani ques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7. 1
Dim ensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7. 1 . 1
Générali tés . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7. 1 . 2
Gui des d'ondes rectang u laires normau x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7. 1 . 3
Rectang ul arité de la section droite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7. 1 . 4
Gui des d'ondes rectang u laires plats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

7. 1 . 5
Gui des d'ondes circu laires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7. 2
Au tres exigences m écan iqu es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7. 2. 1
Cin trag e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7. 2. 2
Torsion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7. 2. 3
Ru gosité de l a su rface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7. 2. 4
Contrain te interne . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8
Essais électriqu es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8. 1
Affaibl issemen t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8. 2
Réflexions in tern es du es au x irrég ularités des dim ensions i n ternes . . . . . . . . . . . . . . . . . . . . . . 27
9
Essais su pplémen taires – Etanch éi té au g az . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28


I EC 601 53-1 :201 6 © I EC 201 6

– 17 –

COMMI SSI ON ÉLECTROTECHNI QUE I NTERNATI ONALE
____________

GUIDES D'ONDES METALLIQUES CREUX –

Partie 1 : Exigences générales et méthodes de mesure
AVANT-PROPOS
1 ) La Com m i ssi on E l ectrotech n i q u e I n tern ati on al e (I EC) est u n e org an i sati on m on d i al e d e n orm al i sati on
com posée d e l 'en sem bl e d es com i tés él ectrotech n i qu es n ati on au x (Com i tés n ati on au x d e l ’ I EC) . L’ I EC a pou r
obj et d e favori ser l a coopérati on i n tern ati on al e pou r tou tes l es q u esti on s d e n orm al i sati on d an s l es d om ai n es
d e l 'él ectri ci té et d e l 'él ectron i q u e. A cet effet, l ’ I EC – en tre au tres acti vi tés – pu bl i e d es N orm es
i n tern ati on al es, d es Spéci fi cati on s tech n i q u es, d es Rapports tech n i q u es, d es Spéci fi cati on s acces si bl es au
pu bl i c (PAS) et d es G u i d es (ci -après d én om m és "Pu bl i cati on (s) de l ’I EC") . Leu r él aborati on est con fi ée à d es
com i tés d 'étu des, au x travau x d esq u el s tou t Com i té n ati on al i n téressé par l e su j et trai té peu t parti ci per. Les
org an i sati on s i n tern ati on al es, g ou vern em en tal es et n on g ou vern em en tal es, en l i ai son avec l ’ I EC, parti ci pen t
ég al em en t au x travau x. L’ I EC col l abore étroi tem en t avec l 'Org an i sati on I n tern ati on al e de N orm al i sati on (I SO) ,
sel on des con di ti on s fi xées par accord en tre l es deu x org an i sati on s.
2) Les déci si on s ou accords offi ci el s de l ’ I EC con cern an t l es q u esti on s tech n i q u es représen ten t, d an s l a m esu re
d u possi bl e, u n accord i n tern ati on al su r l es su j ets étu di és, étan t don n é q u e l es Com i tés n ati on au x d e l ’ I EC
i n téressés son t représen tés dan s ch aq u e com i té d’ étu des.
3) Les Pu bl i cati on s d e l ’ I EC se présen ten t sou s l a form e d e recom m an d ati on s i n tern ati on al es et son t ag réées
com m e tel l es par l es Com i tés n ati on au x d e l ’ I EC. Tou s l es efforts rai son n abl es son t en trepri s afi n q u e l ’ I EC
s'assu re d e l 'exacti tu d e d u con ten u tech n i qu e d e ses pu bl i cati on s; l ’ I EC n e peu t pas être ten u e respon sabl e d e
l 'éven tu el l e m au vai se u ti l i sati on ou i n terprétati on q u i en est fai te par u n q u el con q u e u ti l i sateu r fi n al .
4) Dan s l e bu t d 'en cou rag er l 'u n i form i té i n tern ati on al e, l es Com i tés n ati on au x d e l ’ I EC s'en g ag en t, d an s tou te l a
m esu re possi bl e, à appl i q u er d e faỗon tran sparen te l es Pu bl i cati on s d e l ’ I EC d an s l eu rs pu bl i cati on s n ati on al es
et rég i on al es. Tou tes di verg en ces en tre tou tes Pu bl i cati on s d e l ’ I EC et tou tes pu bl i cati on s n ati on al es ou
rég i on al es correspon d an tes doi ven t être i n di q u ées en term es cl ai rs dan s ces dern i ères.
5) L’ I EC el l e-m êm e n e fou rn i t au cu n e attestati on d e con form i té. Des org an i sm es d e certi fi cati on i n d épen d an ts
fou rn i ssen t d es servi ces d 'éval u ati on d e con form i té et, dan s certai n s secteu rs, accèden t au x m arq u es d e
con form i té d e l ’ I E C. L’ I EC n 'est respon sabl e d 'au cu n d es servi ces effectu és par l es org an i sm es d e certi fi cati on
i n d épen d an ts.
6) Tou s l es u ti l i sateu rs d oi ven t s'assu rer q u 'i l s son t en possessi on d e l a dern i ère éd i ti on de cette pu bl i cati on .
7) Au cu n e respon sabi l i té n e d oi t être i m pu tée à l ’ I EC, à ses ad m i n i strateu rs, em pl oyés, au xi l i ai res ou
m an d atai res, y com pri s ses experts parti cu l i ers et l es m em bres de ses com i tés d 'étu d es et des Com i tés

n ati on au x de l ’ I EC, pou r tou t préj u di ce cau sé en cas d e dom m ag es corporel s et m atéri el s, ou d e tou t au tre
d om m ag e de qu el q u e n atu re q u e ce soi t, d i recte ou i n di recte, ou pou r su pporter l es coû ts (y com pri s l es frai s
d e j u sti ce) et l es d épen ses décou l an t d e l a pu bl i cati on ou d e l 'u ti l i sati on d e cette Pu bl i cati on d e l ’ I EC ou d e
tou te au tre Pu bl i cati on d e l ’ I EC, ou au crédi t q u i l u i est accord é.
8) L'atten ti on est atti rée su r l es référen ces n orm ati ves ci tées d an s cette pu bl i cati on . L'u ti l i sati on d e pu bl i cati on s
référen cées est obl i g atoi re pou r u n e appl i cati on correcte d e l a présen te pu bl i cati on .
9) L’ atten ti on est atti rée su r l e fai t q u e certai n s d es él ém en ts d e l a présen te Pu bl i cati on d e l ’ I EC peu ven t fai re
l ’ obj et d e d roi ts d e brevet. L’ I EC n e sau rai t être ten u e pou r respon sabl e d e n e pas avoi r i den ti fi é d e tel s d roi ts
d e brevets et d e n e pas avoi r si g n al é l eu r exi sten ce.

La N orme in tern ati onale I EC 601 53-1 a été établ ie par le sou s-comité 46F: Com posan ts
passifs pou r hyperfréquences et radio fréqu ences, du com ité d’étu des 46 de l 'I EC: Câbles,
fi ls, gu ides d'on des, connecteu rs, com posan ts passifs pou r m icro-onde et accessoires.
Cette deu xième édi ti on annu le et remplace la prem ière édition paru e en 1 964. Cette éditi on
consti tu e u ne révisi on tech niqu e.
Cette édi tion inclu t les m odi fications techn iqu es majeu res su ivantes par rapport à l 'édition
précéden te:
a) extension de la pl ag e de fréqu ences de fonction nemen t;
b) révision des équ ations d'affai blissemen t.


– 18 –

I EC 601 53-1 :201 6 © I EC 201 6

Le texte de cette norme est issu des docu men ts su i van ts:
CDV

Rapport de vote

46F/302/CDV

46F/31 6/RVC

Le rapport de vote in di qu é dans le tableau ci-dessu s donne tou te in formation sur l e vote ayan t
abou ti à l 'approbation de cette norme.
Cette pu bl ication a été rédi g ée selon les Directives I SO/I EC, Partie 2.
El le doit être l u e con jointemen t avec l a série I EC 601 54: Bri des pou r g u ide d'ondes.
U ne liste de tou tes les parties de l'I EC 601 53, pu bliée sous l e ti tre gén éral Guides d'ondes
métalliques creux, est dispon ible su r le si te intern et de l'I EC.
Le com i té a décidé qu e le conten u de cette publ ication ne sera pas modifié avan t la date de
stabi l ité indiquée su r l e si te web de l’I EC sous "http://webstore. iec. ch " dans les données
relati ves à la publ ication recherchée. A cette date, l a publication sera
•

recon du ite,

•

su pprimée,

•

remplacée par u ne édition révisée, ou

•

amendée.