SIST HD 129.3 S2:2002

SLOVENSKI SIST HD 129.3 S2:2002
prva izdaja
STANDARD
september 2002
Flanges for waveguides - Part 3: Relevant specifications for flat rectangular
waveguides
ICS 33.120.10 Referenčna številka
SIST HD 129.3 S2:2002(en)
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

---------------------- Page: 1 ----------------------

NORME CEI
INTERNATIONALE IEC
60154-3
INTERNATIONAL
Deuxième édition
STAN
DARD
Second edition
1982-01
Brides pour guides d'ondes
Troisième partie:
Spécifications particulières de brides pour
guides d'ondes rectangulaires plats
Flanges for waveguides
Part 3:
Relevant specifications for flanges
for flat rectangular waveguides
© IEC 1982 Droits de reproduction
réservés — Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni
No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun
any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, compris la photo-
y including photocopying and microfilm, without permission in
copie et les microfilms, sans raccord écrit de l'éditeur.
writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
K
PRICE CODE
International Electrotechnical Commission
IEC Me sayHapojtHaa 3neKTpoTeXHH4ecHan HoMHCCHA
Pour prix, voir catalogue en vigueur
• •
For price, see current catalogue

---------------------- Page: 2 ----------------------

154-3 © IEC 1982 3
CONTENTS
Page
FOREWORD 5
PREFACE 5
DIMENSIONAL DEVIATIONS 7
EXPLANATIONS 9
Clause
1. General 13
1.1 Standardized types 13
1.2 Flange designation 13
2. Mechanical requirements 13
2.1 Dimensions 13
2.2 General requirements for assemblies 15
2.3 Additional requirements for unmounted flanges 15
Flange Type G
154 IEC – UGF 22-32 18
154 IEC – UGF 40-84 19
I TABLE 20

---------------------- Page: 3 ----------------------

154-3 © IEC 1982 5
INTERNATIONAL ELECTROTECHNICAL COMMISSION
FLANGES FOR WAVEGUIDES
Part 3: Relevant specifications for flanges for flat
rectangular waveguides
FOREWORD
1) The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on which all the
National Committees having a special interest therein are represented, express, as nearly as possible, an international
consensus of opinion on the subjects dealt with.
2) They have the form of recommendations for international use and they are accepted by the National Committees in that
sense.
In order to promote international unification, the IEC expresses the wish that all National Committees should adopt the text
3)
of the I E C recommendation for their national rules in so far as national conditions will permit. Any divergence between the
IEC recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter.
4) The IEC has not laid down any procedure concerning marking as an indication of approval and has no responsibility when an
item of equipment is declared to comply with one of its recommendations.
PREFACE
This standard has been prepared by Sub-Committee 46B: Waveguides and Their Accessories, of IEC
Technical Committee No. 46: Cables, Wires and Waveguides for Telecommunication Equipment.
It forms the second edition of Part 3 of IEC Publication 154 dealing with flanges for waveguides, and
should be used in conjunction with Part 1: General Requirements and Measuring Methods.
Relevant specifications for other types of flanges have been issued in separate publications.
A draft was discussed at the meeting held in Bucharest in 1974. As a result of this meeting, a draft was
circulated to the National Committees under the Accelerated Procedure in October 1975. A draft, Document
46B(Central Office)80, was submitted to the National Committees for approval under the S ix Months' Rule
in February 1978.
The National Committees of the following countries voted explicitly in favour of publication:
Belgium Japan
Egypt Spain
France Switzerland
Turkey
Germany
Italy United Kingdom

---------------------- Page: 4 ----------------------

154-3 © IEC 1982 7
DIMENSIONAL DEVIATIONS
The values for the permissible deviations in this standard follow the principles given in ISO Recommenda-
tion R286, where:
Deviation is defined as:
algebraical difference between a size (actual, maximum, etc.) and the corresponding basic size.
Upper deviation is defined as:
algebraical difference between the maximum limit of size and the corresponding basic size.
And lower deviation is defined as:
algebraical difference between the minimum limit of size and the corresponding basic size.
It should be noted that the upper and lower deviations may have like signs, unlike signs or either deviation
may be zero. This permits the basic sizes of mating shafts and holes to be identical.
The older concept of plus tolerances and minus tolerances has an undesirable limitation, in that the basic
sizes of mating shafts and holes cannot be identical for clearance fits.
Other IEC publications quoted in this standard:
Publications Nos 153-3: Hollow Metallic Waveguides, Part 3: Relevant Specifications for Flat Rectangular Waveguides.
154-1: Flanges for Waveguides, Part 1: General Requirements and Measuring Methods.
154-6: Part 6: Relevant Specifications for Flanges for Medium Flat Rectangular Waveguides.

---------------------- Page: 5 ----------------------

154-3 © IEC 1982 — 9 —
FLANGES FOR WAVEGUIDES
Part 3: Relevant specifications for flanges for flat
rectangular waveguides
EXPLANATIONS
Flange designation
To permit a more suitable and systematic arrangement and division of the complete IEC Publication 154
into a general part (Part 1) and subsequent pa rts (those already issued and those to be issued in the future),
the first edition of Part 3 contained two sizes of flanges that had been given a temporary type designation,
namely:
154 IEC – PIF(M) 45;
154 IEC – UGF(M) 100.
This had been done because the ratio between the height and the width of the flange aperture is in the
region of 1:4, for these flange ratios, the designation "M" has been allocated.
The technical material for the aforementioned flange types has been deleted from this second edition and
appears in I E C Publication 154-6: Part 6: Relevant Specifications for Flanges for Medium Flat Rectangular
Waveguides as:
154 IEC – PNM 45;
154 IEC – ULM 100,
respectively.
Materials
It should be noted that no recommendations are made for the materials to be used for flanges for wave-
guides. The choice of material must be agreed between purchaser and manufacturer.
Information on reflections
The reflections at the flange joint are of three kinds:
a) those caused by the allowed deviations on the internal dimensions of the waveguides;
b)
those caused by lateral displacements of the two flange assemblies;
c) those caused by the chokes (in the following, these reflections are not taken into account).
When the deviations on the dimensions of the waveguides (according to IEC Publication 153-3: Hollow
Metallic Waveguides, Part 3: Relevant Specifications for Flat Rectangular Waveguides) and of the assemblies
(according to this standard) add up to cause maximum lateral displacement and maximum changes of the
waveguide internal dimensions, the theoretical maximum reflection may be calculated from:
1
reflection loss = 10 login
dB
2
.1g Aa Ob
4.9348 Ag (4a'2) 7.8957 (Ob'2)
4a 3 + b
a 3 Xgb _

---------------------- Page: 6 ----------------------

154-3 © IEC 1982
where:
a = basic inside width of the waveguide
basic inside height of the waveguide
b =
Ag = waveguide wavelength
Aa and Ab are the waveguide internal deviations
Aa' and Ab' are displacements of the waveguide axes
Notes 1. - The first term within brackets represents the worst case reflection component at a flange joint caused by changes of
the waveguide internal dimensions.
2.-
The second term within brackets represents the reflection component at a flange joint caused by the lateral displace-
ment of the two flange assemblies.
At the high end of the waveguide frequency band, the reflection component is maximum when the lateral displace-
ment exists in the short wall direction only.
At the low end of the waveguide frequency band, the reflection component is maximum when the lateral displacement
exists in the long wall direction only.
3. -
The maximum reflection at the high end of the waveguide frequency band is smaller than the maximum reflection at
the low end of the band for the same magnitude of displacement.
4. - The "reflection loss" in decibels is given as a positive quantity.
The worst "reflection loss" in (positive) decibels
for waveguides F22 to F84
Waveguides
Frequency (dB)
F22 F26
F32 F40 F48 F58 F70 F84
f = 1.25 f 39.7
39.6 39.6 39.7 39.5 39.7 40.6 42.1
f = 1.50 f 40.2 40.0
39.8 40.2 40.0 40.1 40.9 42.3
f = 1.90 f 40.0
39.6 39.1 40.1 39.6 39.6 40.3
41.4

---------------------- Page: 7 ----------------------

154-3 © IEC 1982
— 13 —
Clause No. Item
1. General
1.1 Standardized types
The series of flanges for use with flat rectangular waveguides covered by this standard
are given in Table I and Figures 1 and 2, pages 18 and 19.
1.2 Flange designation
Waveguide flanges covered by this standard shall be indicated by a reference number
comprising the f
...