IEC 63466-1:2025
(Main)Leaky waveguides - Part 1: Generic specification - General requirements and test methods
Leaky waveguides - Part 1: Generic specification - General requirements and test methods
IEC 63466-1:2025 specifies the general requirements and test methods for leaky waveguides, including terms and definitions, design and structure, type designation, ratings and characteristics, identification, marking and labelling, requirements and test methods, etc.
This document is applicable to leaky waveguides, including rigid rectangular leaky waveguides and elliptic leaky waveguides. These leaky waveguides are intended for use in tunnels, railways, highways, subways, elevators and other installations in which conventional antenna transmission is not satisfactory or even impossible.
General Information
Standards Content (Sample)
IEC 63466-1 ®
Edition 1.0 2025-11
INTERNATIONAL
STANDARD
Leaky waveguides -
Part 1: Generic specification - General requirements and test methods
ICS 33.120.10 ISBN 978-2-8327-0863-7
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CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Design and structure . 8
4.1 General . 8
4.2 Rigid rectangular leaky waveguides . 9
4.2.1 Waveguide tube . 9
4.2.2 The slots in waveguide tube . 10
4.2.3 Sealing layer . 10
4.2.4 Sheath . 10
4.3 Elliptical leaky waveguides . 10
4.3.1 Waveguide tube . 10
4.3.2 The slots in waveguide tube . 10
4.3.3 Sealing layer (when applicable) . 10
4.3.4 Sheath . 11
5 Type designation . 11
5.1 Type name . 11
5.2 Variant . 11
5.3 Leaky waveguide marking . 12
6 Ratings and characteristics . 12
6.1 Rated temperature range . 12
6.2 Operating frequency . 12
7 Identification, marking and labelling . 12
7.1 Identification. 12
7.2 Marking . 12
7.3 Labelling . 13
8 Requirements and test methods . 13
8.1 General . 13
8.2 Visual inspection. 13
8.2.1 Requirements . 13
8.2.2 Inspection procedure . 13
8.3 Electrical tests . 14
8.3.1 Withstand voltage or spark test of sheath (for elliptical leaky waveguide) . 14
8.3.2 Attenuation constant . 14
8.3.3 Coupling loss . 14
8.3.4 Return loss . 14
8.4 Mechanical tests . 14
8.4.1 Eccentricity of sheath (for elliptical leaky waveguides) . 14
8.4.2 Mechanical dimensions . 14
8.4.3 Eccentricity (for rigid rectangular leaky waveguides) . 15
8.4.4 Bow (for rigid rectangular leaky waveguides) . 15
8.4.5 Twist . 16
8.4.6 Surface roughness . 16
8.4.7 Internal stress (for rigid rectangular leaky waveguides) . 16
8.4.8 Bending (for elliptical leaky waveguides) . 16
8.4.9 Crush resistance test (for elliptical leaky waveguides) . 17
8.4.10 Tensile strength of waveguide (for elliptical leaky waveguides) . 17
8.5 Environmental tests . 17
8.5.1 Cold bend (for elliptical leaky waveguides) . 17
8.5.2 Climatic sequence . 18
8.5.3 UV test . 18
8.5.4 Aging test . 18
8.6 Combustion performance . 19
8.6.1 Requirements . 19
8.6.2 Test procedure . 19
8.7 Sealing test . 19
8.7.1 Requirements . 19
8.7.2 Test procedure . 19
9 Quality assessment . 19
10 Delivery and storage . 19
Annex A (normative) Test methods of attenuation constant . 20
A.1 Test equipment . 20
A.2 Test sample (TS) . 20
A.3 Test arrangement. 20
A.4 Test frequency. 22
A.5 Method A (using VNA) . 22
A.5.1 Known insertion loss of waveguide coaxial adapter . 22
A.5.2 Unknown insertion of waveguide coaxial adapter IL . 23
ad
A.6 Method B (using power meters) . 24
A.6.1 Known insertion loss of waveguide coaxial adapter . 24
A.6.2 Unknown insertion loss of waveguide coaxial adapter . 24
A.7 Report . 25
Annex B (normative) Test methods of coupling loss . 26
B.1 Test equipment . 26
B.2 Test sample (TS) . 27
B.3 Test arrangement. 27
B.3.1 General . 27
B.3.2 Free-space method . 27
B.3.3 Ground-level method . 28
B.4 Test frequency. 29
B.5 Test procedure . 30
B.6 Precautions . 31
B.7 Report . 31
Annex C (normative) Test methods of return loss . 32
C.1 Test equipment . 32
C.2 Test sample (TS) . 32
C.3 Test arrangement. 32
C.4 Test frequency. 33
C.5 Procedure . 33
C.6 Report . 33
Annex D (normative) Test methods of bending for elliptical leaky waveguides . 34
D.1 Test equipment . 34
D.2 Test sample . 34
D.3 Procedure . 34
D.4 Test report . 35
Annex E (normative) Test method for crush resistance of elliptical leaky waveguides. 36
E.1 Equipment . 36
E.2 Test sample . 36
E.3 Procedure . 36
E.4 Test report . 37
Bibliography . 38
Figure 1 – Typical structure of rigid rectangular leaky waveguides . 9
Figure 2 – Typical structure of elliptical leaky waveguides. 9
Figure A.1 – Method A: Free-space arrangement for attenuation constant test
by using VNA . 21
Figure A.2 – Method B: Free space arrangement for attenuation constant test by using
power meters . 21
Figure A.3 – Method A: Ground-level arrangement for attenuation constant test
by using VNA . 22
Figure A.4 – Method B: Ground-level arrangement for attenuation constant test
by using power meters . 22
Figure B.1 – Test arrangement for free-space method . 28
Figure B.2 – Antenna orientations with free-space method . 28
Figure B.3 – Test arrangement for ground-level method . 29
Figure B.4 – Antenna orientations with ground-level method . 29
Figure C.1 – Free space arrangement for return loss test . 32
Figure C.2 – Ground-level arrangement for return loss test . 33
Figure D.1 – Schematic diagram of bending test . 35
Figure E.1 – Crush resistance test . 37
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Leaky waveguides -
Part 1: Generic specification -
General requirements and test methods
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all
national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a) patent(s).
IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect thereof.
As of the date of publication of this document, IEC had not received notice of (a) patent(s), which may be required
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for identifying any or all such patent rights.
IEC 63466-1 has been prepared by IEC technical committee 46: Cables, wires, waveguides, RF
connectors, RF and microwave passive components and accessories. It is an International
Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
46/1065/FDIS 46/1072/RVD
Full information on the voting for its approval can be found in the report on voting indicated in the
above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available at
www.iec.ch/members_experts/refdocs. The main document types developed by IEC are described
in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 63466 series, published under the general title Leaky waveguides, can
be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the specific
document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
1 Scope
This part of IEC 63466 specifies the general requirements and test methods for leaky waveguides,
including terms and definitions, design and structure, type designation, ratings and characteristics,
identification, marking and labelling, requirements and test methods, etc.
This document is applicable to leaky waveguides, including rigid rectangular leaky waveguides
and elliptic leaky waveguides. These leaky waveguides are intended for use in tunnels, railways,
highways, subways, elevators and other installations in which conventional antenna transmission
is not satisfactory or even impossible.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any amendments)
applies.
IEC 60068-1:2013, Environmental testing - Part 1: General and guidance
IEC 60153-1, Hollow metallic waveguides - Part 1: General requirements and measuring methods
IEC 60261, Sealing test for pressurized waveguide tubing and assemblies
IEC 60332-1-2, Tests on electric and optical fibre cables under fire conditions - Part 1-2: Test for
vertical flame propagation for a single insulated wire or cable - Procedure for 1 kW pre-mixed flame
IEC 60754-1, Test on gases evolved during combustion of materials from cables - Part 1:
Determination of the halogen acid gas content
IEC 61034-2, Measurement of smoke density of cables burning under defined conditions - Part 2:
Test procedure and requirements
IEC 61196-1:2005, Coaxial communication cables - Part 1: Generic specification - General,
definitions and requirements
IEC 61196-1-106, Coaxial communication cables - Part 1-106: Electrical test methods - Test for
withstand voltage of cable sheath
IEC 61196-1-212, Coaxial communication cables - Part 1-212: Environmental test methods - UV
stability
IEC 61196-1-215, Coaxial communication cables - Part 1-215: Environmental test methods - High
temperature cable ageing
IEC 61196-1-302, Coaxial communication cables - Part 1-302: Mechanical test methods - Test for
eccentricity
IEC 61196-1-316, Coaxial communication cables - Part 1-316: Mechanical test methods - Test of
maximum pulling force of cable
IEC 62230, Electric cables - Spark-test method
ISO 3274, Geometrical Product Specifications (GPS) - Surface texture: Profile method - Nominal
characteristics of contact (stylus) instruments
ISO 21920-3, Geometrical product specifications (GPS) - Surface texture: Profile - Part 3:
Specification operators
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
– IEC Electropedia: available at https://www.electropedia.org/
– ISO Online browsing platform: available at https://www.iso.org/obp
3.1
leaky waveguide
waveguide with hollow metallic tube that is intentionally not completely closed, so that part of the
electromagnetic wave energy transmitted or received through the waveguides is coupled by a
bidirectional transmission system formed by the hollow metallic tube of the waveguides and the
external environment
Note 1 to entry: The coupling intensity between leaky waveguide and mobile equipment depends on:
– structure of the leaky waveguide;
– characteristics of antenna (such as the type, the orientation, gain, etc.);
– distance and orientation of the mobile antenna from the leaky waveguide;
– nature of ambient atmosphere;
– operating frequency range;
– manner of installation of the leaky waveguide;
– shape, material and size of surrounding buildings.
3.2
rigid rectangular leaky waveguide
leaky waveguide with rectangular cross-section metallic tube not allowing bending and torsion
during installation and operation
3.3
twist
angle rotating around the longitudinal axis over the specified length of the rigid rectangular leaky
waveguide
3.4
bow
maximum deviation of the actual axis length of the rigid rectangular leaky waveguide from the
straight distance of specified length connecting two end points on that axis
3.5
eccentricity
half of the difference between the measured thickness of opposite walls of the rigid rectangular
leaky waveguide
3.6
elliptical leaky waveguide
leaky waveguide with elliptical cross-section metallic tube allowing limited bending and torsion
during installation and operation
3.7
E plane
plane perpendicular to the long axis of the elliptical leaky waveguide and parallel to the short axis
of the elliptical leaky waveguide
3.8
H plane
plane perpendicular to the short axis of the elliptical leaky waveguide and parallel to the long axis
of the elliptical leaky waveguide
3.9
E bend
bending along the E plane of the elliptical leaky waveguide
3.10
H bend
bending along the H plane of the elliptical leaky waveguide
3.11
coupling loss
ratio of the power P transmitted into the leaky waveguide at one point to the power P received by
t r
a half-wavelength dipole antenna located at a distance from the leaky waveguide at the same point
Note 1 to entry: See Formula (1):
P
t
L = 10log
(1)
c 10
P
r
where
L is the coupling loss, in dB;
c
P is the transmission power in the leaky waveguide at one point, in W;
t
P is the receiving power of the half-wavelength dipole antenna at a distance from the leaky waveguide at the same
r
point, in W.
4 Design and structure
4.1 General
The typical structure of rigid rectangular leaky waveguides is shown in Figure 1, and the typical
structure of elliptical leaky waveguides is shown in Figure 2.
The design and structure of the leaky waveguide shall be in accordance with 4.2 or 4.3 and the
relevant specifications.
Key
1 Waveguide tube
2 Slot
3 Sealing layer
4 Sheath
Figure 1 – Typical structure of rigid rectangular leaky waveguides
Key
1 Waveguide tube
2 Slot
3 Sealing layer
4 Sheath
5 Marking of installation or radiating direction
Figure 2 – Typical structure of elliptical leaky waveguides
4.2 Rigid rectangular leaky waveguides
4.2.1 Waveguide tube
The material for waveguide tube shall be as specified in the relevant specifications.
The internal structure and dimensions of waveguide tube shall comply with IEC 60153-1 or relevant
specifications.
Unless otherwise specified, the ratio between the height and width of the inside cross-section is
1:2.
The thickness and tolerance of waveguide tube wall shall be as specified in the relevant
specifications. The inner angle radius shall be specified in the relevant specifications.
The nominal values and tolerances of the height and width of the outside cross-section of
waveguide tube shall be specified in the relevant specifications.
4.2.2 The slots in waveguide tube
The shape and dimensions of the slots in the waveguide shall be such that the electrical
requirements are met.
4.2.3 Sealing layer
The material of sealing layer shall be as specified in the relevant specifications.
The sealing layer should be adhered to the slots of the metal waveguide tube and closely bonded
with the waveguides.
The thickness of the sealing layer shall comply with the requirements for gastight tests of the leaky
waveguides.
4.2.4 Sheath
The material of sheath shall be as specified in the relevant specifications.
The sheath shall cover the whole sealing layer, which can cover only a part of the waveguide tube
or the entire waveguide tube as required.
The thickness and tolerance of the sheath shall be as specified in the relevant specifications.
For outdoor leaky waveguides, UV stability tests shall be passed in accordance with
IEC 61196-1-212.
4.3 Elliptical leaky waveguides
4.3.1 Waveguide tube
The materials for elliptical waveguides tubes shall be as specified in the relevant specifications.
The long and short axis dimensions of elliptical waveguide tubes shall be as specified in the
relevant specifications.
The wall thickness of the elliptical waveguide tubes shall be as specified in the relevant
specifications.
The peak, root, pitch of the elliptical waveguide tube shall be as specified in the relevant
specifications.
4.3.2 The slots in waveguide tube
The shape and dimensions of the slots in the waveguide shall be such that the electrical
requirements are met.
4.3.3 Sealing layer (when applicable)
The material for sealing layer shall be as specified in the relevant specifications.
The sealing layer should be adhered to the slots of the metal waveguide tube and closely bonded
with the waveguides.
The thickness of the sealing layer shall comply with the requirements for gastight tests of the leaky
waveguides.
4.3.4 Sheath
The material for sheath shall be as specified in the relevant specifications.
The sheath shall cover the whole elliptical leaky waveguide, the thickness and tolerance of the
sheath shall be as specified in the relevant specifications.
For outdoor leaky waveguides, UV stability tests shall be passed in accordance with
IEC 61196-1-212.
5 Type designation
5.1 Type name
The type name of the leaky waveguides covered by this specification shall comprise the following:
a) letter "L" indicating the leaky waveguides;
b) a letter indicating the shape of the inside cross-section of the leaky waveguides:
1) R rigid rectangular leaky waveguides.
2) E elliptical leaky waveguides.
NOTE For other types of waveguides, the letter can be in accordance with the relevant specification sheets.
5.2 Variant
The variant of the leaky waveguides covered by this specification shall comprise the following:
a) a number characterizing a particular size of waveguide. This number indicates the centre
frequency characteristic of the leaky waveguide, approximated in multiples of 100 MHz;
b) a dash symbol;
c) two numbers indicating the lowest operating frequency and the highest operating frequency of
the leaky waveguide and a symbol "/" between them. The two numbers are approximated in
multiples of 100 MHz;
d) a dash symbol;
e) waveguide tube material and its structure;
f) material and structure shall be as specified in the relevant specifications;
g) a dash symbol;
h) sheath material.
The material for sheath shall be as specified in the relevant specifications.
5.3 Leaky waveguide marking
The leaky waveguide marking consists of type, variants and IEC standard number, expressed as
follows:
EXAMPLE 1 LR 58-57/59 IEC 63466-3 means a rigid rectangular leaky waveguide with its centre frequency
approximately 5,8 GHz in the dominant mode and operating frequency range from 5,7 GHz to 5,9 GHz. It complies with
IEC 63466-3 .
EXAMPLE 2 LE 58-57/59 IEC 63466-2 means an elliptical leaky waveguides with its centre frequency approximately
5,8 GHz in the dominant mode and operating frequency range from 5,7 GHz to 5,9 GHz. It complies with IEC 63466-2 .
6 Ratings and characteristics
6.1 Rated temperature range
The operating, storage and installation temperature range shall be as specified in the relevant
specifications.
6.2 Operating frequency
Operating frequency range shall be as specified in the relevant specifications.
7 Identification, marking and labelling
7.1 Identification
Waveguides shall be identified in accordance with 5.3.
When applicable, the outer sheath of the waveguide shall be marked with installation and radiation
direction.
7.2 Marking
The manufacturer's mark shall be specified in the relevant specifications.
The marking abrasion resistance shall be as specified in the relevant specifications.
___________
Under consideration.
Under preparation. Stage at the time of publication: IEC CC 63466-2:2025.
7.3 Labelling
Unless otherwise specified in the relevant specification, each leaky waveguide or its package shall
be provided with a label with durable print and give the following minimum information:
a) type designation;
b) length, in meters;
c) name or code of manufacturer or supplier.
8 Requirements and test methods
8.1 General
Unless otherwise specified, all tests shall be carried out in accordance with IEC 60068-1.
Before the measurements are made, the leaky waveguides shall be stored at the measuring
temperature for a period of time to keep the entire leaky waveguides stable at this temperature.
When measurements are made at a temperature other than the specified temperature, the
measurement results shall, when necessary, be corrected at the specified temperature. The
temperature at which the measurements are made shall be stated in the test report.
8.2 Visual inspection
8.2.1 Requirements
8.2.1.1 Workmanship
The leaky waveguides should be precisely manufactured to ensure that its processing accuracy
meets the design and standard requirements.
The hollow metallic tube of the leaky waveguide shall be uniform with its inner face smooth and its
wall thickness uniform. There shall be no burrs, cracks, die marks, chatter marks, dirt, grease or
other irregularities at the slots of hollow metallic tube and its outer face.
The sheath surface of the leaky waveguides shall be smooth, integrated, with no crazing and
cracks.
The finished leaky waveguides should be uniform without kink.
The rigid rectangular leakage waveguides should be straight and free visible bowing or twisting.
8.2.1.2 Deterioration after electrical and mechanical tests
Unless otherwise specified, there shall be no visible deterioration likely to influence the
performance.
8.2.1.3 Marking
It shall be correct in accordance with 7.2 and be legible after any of the specified tests.
8.2.2 Inspection procedure
The inspection will be performed visually or under a magnification as specified in the relevant
specification.
8.3 Electrical tests
8.3.1 Withstand voltage or spark test of sheath (for elliptical leaky waveguide)
8.3.1.1 Requirements
Withstand voltage or spark test of sheath shall be specified in the relevant specifications.
8.3.1.2 Test procedure
Test procedure shall be in accordance with IEC 61196-1-106 (or IEC 62230).
8.3.2 Attenuation constant
8.3.2.1 Requirements
The attenuation constant shall be as specified in the relevant specifications.
8.3.2.2 Test procedure
The attenuation constant shall be measured in accordance with Annex A.
8.3.3 Coupling loss
8.3.3.1 Requirements
Coupling loss shall be as specified in the relevant specifications.
8.3.3.2 Test procedure
Coupling loss shall be measured in accordance with Annex B.
8.3.4 Return loss
8.3.4.1 Requirements
Return loss shall be as specified in the relevant specifications.
8.3.4.2 Test procedure
Return loss shall be measured in accordance with Annex C.
8.4 Mechanical tests
8.4.1 Eccentricity of sheath (for elliptical leaky waveguides)
8.4.1.1 Requirements
Eccentricity of sheath shall be as specified in the relevant specifications.
8.4.1.2 Test procedure
Test procedure shall be in accordance with IEC 61196-1-302.
8.4.2 Mechanical dimensions
8.4.2.1 Requirements
The mechanical dimensions of the leaky waveguides shall comply with 4.2 or 4.3.
8.4.2.2 Test procedure
Dimensions shall be measured by using applicable measuring tools with adequate accuracy. The
test procedure shall be in accordance with IEC 61196-1:2005, 4.3.
8.4.3 Eccentricity (for rigid rectangular leaky waveguides)
8.4.3.1 Requirements
The eccentricity shall be as specified in the relevant specifications.
8.4.3.2 Test procedure
The maximum and minimum thicknesses of opposite walls of the rigid rectangular leaky waveguide
shall be measured by using an applicable tool with adequate accuracy separately.
Calculate the maximum difference between the maximum thickness of one wall and the minimum
thicknesses of the opposite wall.
Then the eccentricity is the half of the maximum difference which can be calculated by Formula (2):
TT−
E= (2)
where
E is the eccentricity of rigid rectangular leaky waveguide;
T is the maximum wall thickness of the rigid rectangular leaky waveguide, in mm;
T is the minimum wall thickness opposite maximum wall thickness of the rigid rectangular leaky
waveguide, in mm.
8.4.4 Bow (for rigid rectangular leaky waveguides)
8.4.4.1 Requirements
For a length of 10 times the internal width, the external bow shall not exceed 10 times the specified
tolerance on the internal width.
For a length of 50 times the internal width, the external bow shall not exceed 40 times the specified
tolerance on the internal width.
8.4.4.2 Test procedure
The test procedure shall be done as follows:
a) take a leaky waveguide with its length of 10 times or 50 times the internal width;
b) measure its axis length with an applicable tool with adequate accuracy. Measurement shall be
done on the external surface of the leaky waveguide;
c) measure the straight distance between two ends of the leaky waveguide;
d) calculate the maximum deviation of the actual axis length from the straight distance between
two ends of the leaky waveguide;
e) for the determination of the external bow, the waveguide shall be so positioned that gravity
does not tend to affect the value of bow.
8.4.5 Twist
8.4.5.1 Requirements
The rate of twist shall not exceed:
a) 0,5° per meter for rigid rectangular leaky waveguides with an internal width equal or larger than
100 mm;
b) 0,5° per length of rigid rectangular leaky waveguides equal to ten times the internal width when
the latter is less than 100 mm;
c) over a length equal to 50 times the internal width of the rigid rectangular leaky waveguide, the
accumulated twist shall not exceed 2°. The direction of twist should not be systematic in a
batch of rigid rectangular leaky waveguides;
d) the twist angle of elliptical leaky waveguides shall be specified in the relevant specifications.
8.4.5.2 Inspection procedure
Use measuring tools with adequate accuracy to measure the length and the angle.
8.4.6 Surface roughness
8.4.6.1 Requirements
When applicable, inner surface roughness of the leaky waveguide's tube shall be in accordance
with the relevant specifications.
8.4.6.2 Inspection procedure
Surface roughness of the leaky waveguides shall be tested in accordance with ISO 3274 and
ISO 21920-3.
8.4.7 Internal stress (for rigid rectangular leaky waveguides)
8.4.7.1 Requirements
After cutting, the cross-section dimensions of the leaky waveguide tube shall still be within the
specified tolerances.
8.4.7.2 Inspection procedure
The leaky waveguide tube shall be cut by a saw in a controlled manner to avoid any distortion. A
fine high-speed saw is recommended.
After cutting, measurement shall be done by using measuring tools with adequate accuracy.
8.4.8 Bending (for elliptical leaky waveguides)
8.4.8.1 Requirements
The bending radius and the repeated number of the E bend and H bend for the elliptical leaky
waveguides shall be as specified in the relevant specifications.
After test, the sample shall meet the following requirements:
a) there shall be no physical damages of waveguides tube, sealing layer and sheaths;
b) the change of the return loss before and after the test shall be in accordance with the relevant
specifications;
c) sealing test after the bend test shall be in accordance with the relevant specifications.
8.4.8.2 Test procedure
Test procedure shall be done in accordance with Annex D.
8.4.9 Crush resistance test (for elliptical leaky waveguides)
8.4.9.1 Requirements
The force loaded on the E plane and H plane of the elliptical leaky waveguides shall be as specified
in the relevant specifications.
After the crush resistance test, the change of the return loss before and after the test shall be in
accordance with the relevant specifications.
8.4.9.2 Test procedure
Test procedure shall be in accordance with Annex E.
8.4.10 Tensile strength of waveguide (for elliptical leaky waveguides)
8.4.10.1 Requirements
Tensile strength of waveguide shall be as specified in the relevant specifications.
8.4.10.2 Test procedure
Test procedure shall be in accordance with IEC 61196-1-316.
8.5 Environmental tests
8.5.1 Cold bend (for elliptical leaky waveguides)
8.5.1.1 Requirements
The bending radius and the repeated number of the E bend and H bend of the elliptical leaky
waveguides shall be as specified in the relevant specifications.
After test, the sample shall meet the following requirements:
a) there shall be no physical damages of waveguides tube, sealing layer and sheath;
b) the change of the return loss before and after the test shall be in accordance with the relevant
specifications;
c) sealing test after the bend test shall be in accordance with the relevant specifications.
8.5.1.2 Test procedure
The test sample shall be cooled at the temperature in accordance with the relevant specifications
and maintained for a period of not less than 4 h while the sample shall be kept reasonably straight.
After the conditioning period and while the sample is still at the test temperature, the cold bending
test of the sample shall be carried out in accordance with Annex D.
8.5.2 Climatic sequence
8.5.2.1 Requirements
After test, the sample shall meet the following requirements:
a) there shall be no physical damages of waveguides tube, sealing layer and sheath;
b) the change of the return loss before and after the test shall be in accordance with the relevant
specifications;
c) sealing test after the bend test shall be in accordance with the relevant specifications.
8.5.2.2 Test procedure
Climatic sequence shall be tested in accordance with IEC 60068-1:2013, Clause 6.
8.5.3 UV test
8.5.3.1 Requirements
The change ratios of the tensile strength and elongation at break of the sheath samples before
a
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