HD 123.1 S1:1977
(Main)Hollow metallic waveguides - Part 1: General requirements and measuring methods
Hollow metallic waveguides - Part 1: General requirements and measuring methods
Specifies for hollow metallic waveguides: the details necessary to ensure compatibility and interchangeability, test methods and uniform requirements for the electrical and mechanical properties.
Metallische Hohlleiter - Teil 1: Allgemeine Anforderungen und Meßverfahren
Guides d'ondes métalliques creux - Partie 1: Prescriptions générales et méthodes de mesure
Spécifie pour les guides d'ondes métalliques creux: les détails nécessaires pour assurer la compatibilité et l'interchangeabilité, les méthodes de mesure et les conditions uniformes d'essai pour les propriétés électriques et mécaniques.
Hollow metallic waveguides - Part 1: General requirements and measuring methods
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Standards Content (Sample)
SLOVENSKI SIST HD 123.1 S1:2002
prva izdaja
STANDARD
september 2002
Hollow metallic waveguides - Part 1: General requirements and measuring methods
ICS 33.120.10 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
NORME
CEI
INTERNATIONALE
IEC
60153-1
INTERNATIONAL
Première édition
STAN DARD
First edition
1964-01
Guides d'ondes métalliques creux
Première partie:
Prescriptions générales et méthodes de mesure
Hollow metallic waveguides
Part 1:
General requirements and measuring methods
© IEC 1964 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
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-3—
CONTENTS
Page
FOREWORD
PREFACE 5
Clause
Scope 9
Object 9
SECTION ONE — GENERAL
1.1 Terminology
1.2 Type designation 13
1.3 Standard atmospheric conditions for testing 13
1.4 Visual inspection 15
SECTION TWO — MECHANICAL REQUIREMENTS
2.1 Dimensions
2.2 Other mechanical requirements 21
SECTION THREE — ELECTRICAL TESTS
3.1 Attenuation
3.2 Irregularity of characteristic impedance
SECTION FOUR — ADDITIONAL TESTS
4.1 Gastightness 25
-5—
INTERNATIONAL ELECTROTECHNICAL COMMISSION
HOLLOW METALLIC WAVEGUIDES
Part 1: General requirements and measuring methods
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.
3) In order to promote this international unification, the IEC expresses the wish that all National Committees having as
yet no national rules, when preparing such rules, should use the IEC recommendations as the fundamental basis for
these rules in so far as national conditions will permit.
4) The desirability is recognized of extending international agreement on these matters through an endeavour to harmonize
national standardization rules with these recommendations in so far as national conditions will permit. The National
Committees pledge their influence towards that end.
5) The IEC has not laid down any procedure concerning marking as an indication of approval and has no respon-
sibility when an item of equipment is declared to comply with one of its recommendations.
PREFACE
This Recommendation has been prepared by Sub-Committee 46B: Waveguides and their accessories,
of Technical Committee No. 46, Cables, wires and waveguides for telecommunications equipment.
The recommendation is issued in four parts, viz.
Part 1: General requirements and measuring methods.
Part 2: Relevant specifications for ordinary rectangular waveguides.
Part 3: Relevant specifications for flat rectangular waveguides.
Part 4: Relevant specifications for circular waveguides.
The present booklet contains Part 1: General requirements and measuring methods.
Part 2, 3 and 4: Relevant specifications for waveguides are issued as IEC Publications 153-2, 153-3
and 153-4 respectively.
The general outline of the recommendation was first discussed during the meeting of a former Working
Group in Paris in November 1956. A draft was prepared which was given full consideration in Stockholm
in May 1957. Successive revised drafts were then prepared and discussed during the meetings held in Lon-
don in May 1958, in Ulm in October 1959, and in Copenhagen in October 1960.
During the latter meeting the draft was accepted for submission to National Committees for approval
under the Six Month's Rule.
Four unfavourable votes were received and several countries submitted comments which were conside-
red during the meeting at Interlaken in June 1961.
Amendments adopted during the latter meeting were circulated to all National Committees under
the Two Months' Procedure and no negative votes were received.
Some editorial comments were discussed and accepted at the meeting in Bucharest in June 1962.
in favour of publication :
The following countries voted explicitly
Norway
Belgium
Czechoslovakia Poland
Romania
Denmark
Sweden
France
Switzerland
Germany
Finland United Kingdom
Italy United States of Amerid
Japan Yugoslavia
Netherlands
—9—
HOLLOW METALLIC WAVEGUIDES
Part 1: General requirements and measuring methods
This recommendation takes into account when necessary IEC Publication 68, Basic Climatic and
Mechanical Robustness Testing Procedures for Components for Electronic Equipment and shall be used
in conjunction with IEC Publication 154, Flanges for Waveguides.
When there is a difference between the general requirements and the relevant specification sheet, the
latter shall prevail.
SCOPE
This recommendation relates to straight hollow metallic tubing for use as waveguides in electronic
equipment.
OBJECT
The aim of this recommendation is to specify for hollow metallic waveguides:
a) the details necessary to ensure compatibility and, as far as essential, interchangeability;
b) test methods;
c) uniform requirements for the electrical and mechanical properties.
It should be noted that no recommendations are made for the materials to be used for waveguides.
The choice of material must be agreed between customer and manufacturer.
— 11 —
SECTION ONE — GENERAL
1.1 TERMINOLOGY
1.1.1 Technical terms
In accordance with the International Electrotechnical Vocabulary (I.E.V.), Publication 50 (62).
1.1.2
Definitions relating to testing procedures
1.1.2.1 Type
A type comprises products having similar design features manufactured by the same tech-
niques and falling within the manufacturer's usual range of ratings for these products.
Notes 1.) —
Mounting accessories are ignored, provided they have no significant effect on the test results.
2.) — Ratings cover the combination of:
a) electrical ratings,
b) sizes,
c) environmental group.
3.) — The limits of the range of ratings shall be agreed between customer and manufacturer.
1.1.2.2 Type test
The type test of a product is the complete series of tests to be carried out on a number of
specimens representative of the type, with the object of determining whether a particular
manufacturer can be considered to be able to produce products meeting the specification.
1.1.2.3 Type approval*
Type approval is the decision by the proper authority (the customer himself or his nominee)
that a particular manufacturer can be considered to be able to produce in reasonable quantities
the type meeting the specification.
1.1.2.4 Acceptance tests*
Acceptance tests are tests carried out to determine the acceptability of a consignment on
the basis of an agreement between customer and manufacturer. The agreement shall cover:
a) the sample size,
b) the selection of tests,
c) the extent to which the specimens shall conform to the requirements for the selected tests
of the specification.
Note. —
In cases of divergent test results, the I E C standard test methods shall be used for acceptance tests.
* As these recommendations only cover type tests, these definitions are included only for information.
— 13 —
1.1.2.5 Factory tests*
Factory tests are those tests carried out by the manufacturer to verify that his products meet
the specification.
1.2 TYPE DESIGNATION
The reference indication for waveguides covered by this specification shall comprise the following:
a) the number of the IEC publication (153).
b) the letters "IEC".
c) a hyphen.
d)
a letter indicating the shape of the inside cross-section of the waveguide:
R = Ordinary rectangular (with a ratio of height to width of approximately 1:2)
F = Flat rectangular
C = Circular.
For other types of waveguides this letter indication shall be in accordance with the relevant speci-
fication sheets.
e) a number characterizing a particular size of waveguide. This number indicates a frequency charac-
teristic of the waveguide.
where necessary, an additional indication as indicated on the relevant specification sheets. The
l)
letter "P" shall be used to indicate close tolerance types. (See Note to Clause 2.1.2.1).
Example: 153 IEC-R 100,
denotes a 22.860 x 10.160 mm (0.900 in x 0.400 in) ordinary rectangular waveguide with
a centre frequency of approximately 10 GHz (Gc/s) in the dominant mode.
1.3 STANDARD ATMOSPHERIC CONDITIONS FOR TESTING
1.3.1 Unless otherwise specified, all tests shall be carried out under "standard atmospheric condi-
tions for testing" as specified in IEC Publication 68, Basic Climatic and Mechanical Robustness
Testing Procedure for Components.
1.3.2 Before the measurements are made, the waveguide shall be stored at the measuring tempera-
ture for a time sufficient to allow the entire waveguide to reach this temperature.
1.3.3 When measurements are made at a temperature other than the specified temperature, the
results shall, where necessary, be corrected to the specified temperature. The ambient tempera-
ture at which the measurements are made shall be stated in the test report.
* As these recommendations only cover type tests, these definitions are included only for information.
— 15 —
1.4 VISUAL INSPECTION
The waveguides shall be uniform in composition and in wall thickness and shall be straight and
smooth from end to end. There shall be no burrs, cracks, die marks, chatter marks, dirt, grease or
other irregularities of the surface.
Both inner and outer surface shall have a clean bright appearance in accordance with good current
practice.
SECTION TWO — MECHANICAL REQUIREMENTS
2.1 DIMENSIONS
2.1.1 General
The dimensions of the waveguides and the tolerances thereon shall be in accordance with the
values given on the relevant specification sheets. Dimensions and tolerances shall be given
both in millimetres and inches, indicating in which system of units the dimensions were origi-
nated.
Independent of the system of units, the nominal dimensions of the inside and outside cross-
section shall be given in such a way that the values, the first digit of which is 3 to 9, should be
given by 4 significant figures and those with first digits being 1 or 2 by 5 significant figures. In
principle, internal nominal dimensions shall be rounded off to the nearest 0.001 mm or 0.0001 in
and external dimensions should be rounded off to the nearest 0.01 mm or 0.001 in.
Note. — When these rules are applied, a junction of two hypothetical waveguides each with a nominal value in
one of the systems will produce a calculated reflection of less than —70 dB for ordinary rectangular
waveguides, except for the smaller types.
Unless otherwise specified, the following dimensions shall be given on the relevant specifi-
cation sheets :
a) nominal dimensions of inside cross-section,
b) tolerances on inside dimensions,
c) maximum radius of inside corner for rectangular waveguides,
d) nominal wall thickness,
e) maximum eccentricity,
f) nominal dimensions of outside cross-section,
g) tolerance on outside dimensions,
minimum and maximum radius of outside corner for rectangular waveguides,
h)
i) ellipticity for circular waveguides.
2.1.2 Ordinary rectangular waveguides
2.1.2.1 Inside dimensions
The standard ratio between height and width of the inside cross-section is 1:2. (For some
sizes the ratio between height and width differs somewhat from this ratio. These sizes were
chosen because they were already extensively used).
Note. — If closer tolerances are necessary, a ratio of ± 000 is recomm1 nded.
e
The tolerances both on width and height are given on the relevant specification sheet. Inside
corner radii shall be as given on the relevant specification sheet.
— 17 —
2.1.2.2 Wall thickness
The nominal wall thickness is defined as half the difference between nominal outside and
inside dimensions in the original system of units. Its value shall be given on the relevant
specification sheets for information.
After conversion from inches into millimetres the values shall be rounded to the nearest
0.005 mm.
After conversion from millimetres into inches the values shall be rounded to the nearest
0.001 in.
2.1.2.3 Eccentricity
The eccentricity is defined as half the difference between measured thickness of opposite
walls. Unless otherwise specified, the eccentricity shall not exceed 10 % of the nominal wall
thickness. For the determination of the eccentricity, the thicknesses shall be measured where
they give the most unfavourable result.
Outside dimensions
2.1.2.4
Nominal values of height and width shall be as given on the relevant specification sheet.
No outside dimensions have been specified for some of the-largest sizes because a variety of
manufacturing techniques are used.
2) shall be within the following limits:
The outside corner radius (r
min 0.5 d
1.2 =
0.5 nun (0.02 in)
r2 max = r2 min +
nominal wall thickness.
where d =
Rectangularity of cross-section
2.1.2.5
The dimensional requirements in Sub-clauses 2.1.2.1 and 2.1.2.4 do not control the rectan-
gularity of the cross-section.
The allowed deviation from rectangularity is defined by the requirement that the shape of
the inside (outside) cross-section shall be such that it is possible to inscribe the actual internal
(external) cross-section in the area between the specified maximum and minimum internal
(external) rectangles. A suitable method for checking rectangularity is given below by way of
example.
A) For inside cross-section
A block with the dimensions specified below shall pass through the waveguide without
hindrance.
In drawing the block through the waveguide, precaution must be taken to keep it accu-
rately normal to the
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