ISO 11452-5:1995
(Main)Road vehicles — Electrical disturbances by narrowband radiated electromagnetic energy — Component test methods — Part 5: Stripline
Road vehicles — Electrical disturbances by narrowband radiated electromagnetic energy — Component test methods — Part 5: Stripline
Specifies tests for electromagnetic compatibility of electronic components for passenger cars and commercial vehicles regardless of the propulsion system. The electromagnetic disturbances considered are limited to continuous narrowband electromagnetic fields. The tests are not suitable for tests of the electromagnetic immunity of complete vehicles.
Véhicules routiers — Perturbations électriques par rayonnement d'énergie électromagnétique en bande étroite — Méthodes d'essai d'un composant — Partie 5: Ligne TEM à plaques
General Information
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Standards Content (Sample)
INTERNATIONAL
Is0
STANDARD
11452-5
First edition
1995-l Z-01
Road vehicles - Electrical disturbances
by narrowband radiated electromagnetic
energy - Component test methods -
Part 5:
Stripline
VGhicules routiers - Perturbations klectriques par rayonnemen t d’gnergie
6lectromagn6tique en bande ktroite - M&hodes d’essai d’un
composan t -
Partie 5: Ligne TEM 2 plaques
Reference number
IS0 11452-5:1995(E)
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IS0 11452=5:1995(E)
Contents
Page
1
1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . .*.
2 Normative reference
1
3 Test conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Test temperature and supply voltage
2
3.2 Frequency range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
3.3 Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
. . . . . . . . . . . . . . . . . . . . .*.
3.4 Dwell time
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Frequency step sizes
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 Test severity levels
2
. . . . . . . . . . . . . . . . . . . . . . . .
4 Test instrument description and specifications
2
4.1 Stripline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4.2 Instrumentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
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4.3 Test set-up
5
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5 Test procedure
5
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5.1 Test plan
5
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5.2 Test methods
6
5.3 Test report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Annexes
7
A Stripline design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IO
. . . . . . . . . . . . . . .
B Function performance status classification (FPSC)
0 IS0 1995
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii
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0 IS0 IS0 11452=5:1995(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 114525 was prepared by Technical Committee
lSO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic
equipment.
IS0 11452 consists of the following parts, under the general title Road
vehicles - Electrical disturbances by narrowband radiated electro-
magnetic energy - Component test methods:
- Part 1: General and definitions
- Part 2: Absorber-lined chamber
- Part 3: Transverse electromagnetic mode (TEM) cell
- Part 4: Bulk current injection (BCI)
- Part 5: Stripline
- Part 6: Parallel plate antenna
- Part 7: Direct radio frequency (RF) power injection
Annexes A and B of this part of IS0 11452 are for information only.
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IS0 11452=5:1995(E)
INTERNATIONAL STANDARD 0 ISO
Road vehicles - Electrical disturbances
by narrowband radiated electromagnetic energy -
Component test methods -
Part 5:
Stripline
through reference in this text, constitute provisions
1 Scope
of this part of IS0 11452. At the time of publication,
the edition indicated was valid. All standards are sub-
This part of IS0 11452 specifies tests for electro-
ject to revision, and parties to agreements based on
magnetic immunity of electronic components for
this part of IS0 11452 are encouraged to investigate
passenger cars and commercial vehicles regardless
of the propulsion system (e.g. spark-ignition engine, the possibility of applying the most recent edition of
the standard indicated below. Members of IEC and
diesel engine, electric motor). To perform this test,
IS0 maintain registers of currently valid International
the equipment harness is exposed to a disturbance
Standards.
field. This technique is limited to equipment har-
nesses which have a maximum diameter one-third
IS0 11452-l :I 995, Road vehicles - Electrical dis-
the stripline height or less. The electromagnetic dis-
turbances by narrowband radiated electromagnetic
turbances considered in this part of IS0 11452 are
energy - Component test methods - Part 1: Gen-
limited to continuous narrowband electromagnetic
eral and definitions.
fields.
Immunity measurements of complete vehicles are
generally only possible by the vehicle manufacturer
because, for example, of the high costs of an
3 Test conditions
absorber-lined room, preserving the secrecy of proto-
types or the large number of different vehicle models.
Therefore, for research, development and quality
3.1 Test temperature and supply voltage
control, a laboratory measuring method is used by the
manufacturer.
The ambient temperature during the test shall be
(23 + 5) “C.
IS0 11452-1 specifies general test methods, defi-
nitions, practical use and basic principles of the test
The supply voltage during the test shall be
procedure.
(13,5 + 0,s) V for 12 V electrical systems and
(27 +?) V for 24 V electrical systems.
-
If other values are agreed by the users of this part of
2 Normative reference
IS0 11452, the values shall be documented in the
test report.
The following standard contains provisions which,
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0 IS0
IS0 11452=5:1995(E)
3.2 Frequency range 3.6 Test severity levels
The user should specify the test severity level(s) over
The applicable frequency range of the stripline is from
the frequency range. Suggested test severity levels
0,Ol MHz to 200 MHz.
are included in annex B.
3.3 Modulation
These test severity levels are expressed in terms of
the equivalent root-mean-square value of the un-
The test determines the type and frequency of the
modulated wave.
modulation. If no values are agreed between the
users of this part of IS0 11452, the following shall be
used:
4 Test instrument description
and specifications
- no modulation (CW)
4.1 Stripline
- 1 kHz sine-wave amplitude modulation (AM) of
80 %
A stripline ideally sets up a region of uniform electro-
magnetic field. The primary usage of this stripline is
3.4 Dwell time
to expose at least I,5 m of the wiring harness to RF
fields (see figure 1).
At each frequency, the device under test shall be ex-
posed to the test level for the minimum response
In practice, the fields generated will be uniform
time needed to control it. In all cases, this minimum
(-& 2 dB) only below the TEM multi-mode frequency.
time of exposure shall not be greater than 2 s.
The use of a straight length of cable or harness of
I,5 m within the stripline is required to integrate fields
above the multi-mode frequencies along the length
35 . Frequency step sizes
of the harness.
All tests in this part of IS0 11452 shall be conducted
All wires in the wiring harness shall be terminated.
with frequency step sizes not greater than those
When possible actual vehicles loads, sensors and ac-
shown in table 1.
tuators shall be used.
Since the wiring harness is typically oriented
Table 1 - Frequency step sizes
longitudinally along the length of the stripline, both the
Maximum
electric field and H-field are coupled into the wiring
Frequency band
frequency step size
harness for this configuration (see figure2). The main
MHz coupling mechanism is the differential mode since the
MHz
wires in the harness are at different heights above the
0,Ol
>O,Ol to GO,1
stripline ground plane. Common mode coupling also
>O,l to
nents) of the device under test to the ground plane.
>I to
This coupling will provide information on the device
>I0 to
under test behaviour representative of the vehicle
environment.
Alternatively, logarithmic frequency steps, with the
The coupled fields will not correspond one-to-one to
same minimum number of frequency steps in each
a plane wave radiated field intersecting the wiring
frequency band, may be used. The values, as agreed
harness. This is an acceptable compromise, since in
by the users of this part of IS0 11452, shall be docu-
an actual vehicle the fields at the device under test
mented in the test report.
harness are typically not a plane wave, but are altered
due to body panels causing slot antenna and cavity
If it appears that the susceptibility thresholds of the
resonance effects. In some instances, the stripline
device under test are very near the chosen test level,
field strength will need to be considerably higher than
these frequency step sizes should be reduced in the
frequency range concerned to find the minimum sus- (e.g. twice) the plane wave field strength to obtain
ceptibility th
...
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