SIST EN 302 858-1 V1.2.1:2011

Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Road Transport and Traffic Telematics (RTTT);
Short range radar equipment operating in the 24,05 GHz to
24,25 GHz frequency range for automotive application;
Part 1: Technical characteristics and test methods

---------------------- Page: 1 ----------------------
2 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)



Reference
DEN/ERM-TGSRR-051-1
Keywords
radar, radio, RTTT, SRD, testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2010.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
Contents
Intellectual Property Rights . 5
Foreword . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definitions, symbols and abbreviations . 7
3.1 Definitions . 7
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Equipment under test . 9
4.1 Presentation of equipment for testing purposes . 9
4.1.1 Choice of model for testing . 9
4.2 Mechanical and electrical design . 9
4.3 Auxiliary test equipment . 10
5 Test conditions, power sources and ambient temperatures . 10
5.1 Normal and extreme test conditions . 10
5.2 External test power source. 10
5.3 Normal test conditions . 10
5.3.1 Normal temperature and humidity . 10
5.3.2 Normal test power source . 10
5.3.2.1 Test equipment voltage and nominal test voltage . 10
5.3.2.2 Other power sources . 11
5.4 Extreme test conditions . 11
5.4.1 Extreme temperatures . 11
5.4.1.1 Procedure for tests at extreme temperatures . 11
5.4.1.2 Extreme temperature ranges . 11
5.4.2 Extreme test source voltages . 11
5.4.2.1 Mains voltage . 11
5.4.2.2 Other power sources . 11
6 Measurement setup . 11
6.1 Test sites and general arrangements for radiated measurements . 11
6.2 Test fixture . 12
6.2.1 Characteristics . 12
6.2.2 Validation of the test fixture in the temperature chamber . 13
6.2.3 Use of the test fixture for measurement in the temperature chamber . 14
6.3 RF cables . 15
6.4 Measuring receiver . 15
6.4.1 Frequency-selective voltmeter or spectrum analyzer . 15
6.4.2 Signal analyzer . 16
6.4.3 Amplitude calibration . 16
7 Limits for transmitter parameters and methods of measurements . 17
7.1 Introduction . 17
7.2 Frequency, power limits and spectrum access conditions . 17
7.3 Permitted range of operating frequencies . 19
7.3.1 Definition . 19
7.3.2 Method of measurement . 19
7.3.3 Limits . 20
7.4 Maximum radiated peak power (e.i.r.p.) . 20
7.4.1 Definition . 20
7.4.2 Method of measurement . 20
7.4.3 Limits . 21
ETSI

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4 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
7.5 Dwell time and repetition time . 21
7.5.1 Definition . 21
7.5.2 Methods of measurement . 21
7.5.2.1 Signal analysis measurement . 21
7.5.2.2 Measurement of dwell time for a single dwell time event per 40 kHz in 3 ms (category C1) . 23
7.5.2.3 Measurement of cumulated dwell time for more than one dwell time event per 40 kHz in 3 ms
(category C2) . 24
7.5.2.3.1 Statistical measurement procedure . 24
7.5.2.3.2 Verification procedure . 25
7.5.2.4 Measurement of absolute dwell time per 40 kHz (category D) . 26
7.5.2.5 Measurement of repetition time for absolute dwell times per 40 kHz (category D) . 28
7.5.3 Limits . 29
7.6 Frequency modulation range . 29
7.6.1 Definition . 29
7.6.2 Method of measurement . 29
7.6.3 Limits . 30
7.7 Radiated spurious emissions. 30
7.7.1 Definition . 30
7.7.2 Method of measurement . 30
7.7.3 Limits . 30
8 Methods of measurement and limits for receiver parameters . 31
8.1 Receiver spurious emissions. 31
8.1.1 Definition . 31
8.1.2 Method of measurement - radiated spurious emissions . 31
8.1.3 Limit . 32
9 Interpretation of test results and measurement uncertainty . 32
9.1 Interpretation of the measurement results . 32
9.2 Absolute measurement uncertainty . 32
Annex A (normative): Radiated measurements . 33
A.1 General requirements for measurements involving the use of radiated fields. 33
A.2 Test Sites . 34
A.2.1 Outdoor test site . 34
A.2.2 Indoor test site . 35
A.2.3 Shielded anechoic test site . 36
A.2.3.1 Influence of parasitic reflections in anechoic chambers . 36
A.2.3.2 Calibration of the shielded RF anechoic chamber . 36
A.3 Antennas . 38
A.3.1 Test antenna . 38
A.3.2 Substitution antenna . 38
A.3.3 Artificial antenna . 38
A.4 Test practice and auxiliary test equipment . 39
A.5 Measuring distance . 39
A.5.1 Standard position . 39
A.5.2 Auxiliary cables . 39
Annex B (normative): Installation requirements . 40
B.1 Installation requirements of 24 GHz Narrow Band Short Range Radar (NB SRR) systems . 40
Annex C (informative): Conversion of power density to e.i.r.p. 41
C.1 Assumptions . 41
C.2 Example . 41
Annex D (informative): Bibliography . 42
History . 43
ETSI

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5 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM), and is now submitted for the Public Enquiry phase
of the ETSI standards Two-step Approval Procedure.
For non EU countries the present document may be used for regulatory (Type Approval) purposes.
Equipment compliant with the present document is intended for fitment into road vehicles, therefore it is subject to
automotive EMC type approval and needs to comply with Directive 95/54/EC [i.3].
For use on vehicles outside the scope of Directive 95/54/EC [i.3] compliance with an EMC directive/standard
appropriate for that use is required.
The present document is part 1 of a multi-part deliverable covering Electromagnetic compatibility and Radio spectrum
Matters (ERM); Road Transport and Traffic Telematics (RTTT); Short range radar equipment operating in the
24,05 GHz to 24,25 GHz frequency range for automotive application, as identified below:
Part 1: "Technical characteristics and test methods";
Part 2: "Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive".

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

ETSI

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6 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
1 Scope
The present document specifies the technical requirements and methods of measurement for Short Range Devices
(SRD) operating in the 24,05 GHz to 24,25 GHz frequency range intended for Narrow Band Short Range Radar (NB
SRR) for Road Transport and Traffic Telematics (RTTT) applications such as Automotive Cruise Control (ACC),
Collision Warning, Anti-Collision (AC) systems, obstacle detection, Stop and Go, blind spot detection, parking aid,
precrash, backup aid and other safety relevant automotive applications.
The present document contains the technical characteristics and test methods for narrowband short range radar
equipment fitted with integral antennas and applies to transmitters and receivers with integral antennas operating in all
or part of the range from 24,05 GHz to 24,25 GHz.
The present document does not necessarily include all the characteristics which may be required by a user, nor does it
necessarily represent the optimum performance achievable.
The present document covers only NB SRR equipment for vehicles.
The present document complies with field limits for human exposure to electromagnetic fields as provided by the
EC Recommendation 1999/519/EC [i.4] and the methods for compliance demonstration in EN 50371 [i.5].
Table 1 shows the frequency bands as designated to narrow band short range radar devices.
Table 1: Narrow band short range radar devices frequency of operation
Frequency Bands/frequencies Applications
Transmit and Receive 24,05 GHz to 24,25 GHz Short range radar for vehicle applications

2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] CISPR 16 (2006) (parts 1-1, 1-4 and 1-5): "Specification for radio disturbance and immunity
measuring apparatus and methods; Part 1: Radio disturbance and immunity measuring apparatus".
[2] ETSI TR 100 028 (V1.4.1) (all parts): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Uncertainties in the measurement of mobile radio equipment characteristics".
ETSI

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7 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
[3] ETSI TR 102 273 (V1.2.1) (all parts): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the
corresponding measurement uncertainties".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] CEPT/ERC Recommendation 70-03: "Relating to the use of Short Range Devices (SRD)".
[i.2] CEPT/ECC Report #134 on analysis of potential impact of mobile Vehicle Radars (VR) on Radar
Speed Meters (RSM) operating at 24 GHz.
[i.3] Commission Directive 95/54/EC of 31 October 1995 adapting to technical progress Council
Directive 72/245/EEC on the approximation of the laws of the Member States relating to the
suppression of radio interference produced by spark-ignition engines fitted to motor vehicles and
amending Directive 70/156/EEC on the approximation of the laws of the Member States relating
to the type-approval of motor vehicles and their trailers.
[i.4] Council Recommendation 1999/519/EC of 12 July 1999 on the limitation of exposure of the
general public to electromagnetic fields (0 Hz to 300 GHz).
[i.5] CENELEC EN 50371 (2002): "Generic standard to demonstrate the compliance of low power
electronic and electrical apparatus with the basic restrictions related to human exposure to
electromagnetic fields (10 MHz - 300 GHz) - General public".
[i.6] CEPT/ERC/REC 74-01: "Unwanted emissions in the spurious domain".
[i.7] ITU-R Recommendation SM.328-10: "Spectra and Bandwidth of Emissions".
[i.8] ITU-R Recommendation SM.329: "Variation of the boundary between the out-of-band and
spurious domains".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
assigned frequency band: frequency band within which the device is authorized to operate
boresight: axis of the main beam in a directional antenna
bumper: generally 3D shaped plastic sheet normally mounted in front of the NB SRR
co-located receiver: receiver is located in the same module box as the transmitter
duty cycle: ratio of the total on time of the "message" to the total off-time in any one hour period
NOTE: The device may be triggered either automatically or manually, whether the duty cycle is fixed or random
depends on how the device is triggered.
dwell time: in general, a time interval for which a certain frequency range is occupied
NOTE: "Cumulated dwell time" is the sum of individual dwell times within a measurement time frame
and in a defined frequency range.
"Absolute dwell time" is the time from first entrance into a defined frequency range until last exit from a
defined frequency range.
ETSI

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8 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
Equipment Under Test (EUT): radar sensor including the integrated antenna together with any external antenna
components which affect or influence its performance
equivalent isotropically radiated power (e.i.r.p.): total power or power density transmitted, assuming an isotropic
radiator
NOTE: e.i.r.p. is conventionally the product of "power or power density into the antenna" and "antenna gain".
e.i.r.p. is used for both peak or average power and peak or average power density.
2
far field measurement: measurement at a distance "X" of at least 2d /λ , where d is the largest dimension of the
antenna aperture of the EUT
operating frequency (operating centre frequency): nominal frequency at which equipment is operated
power envelope: power supplied to the antenna by a transmitter during one radio frequency cycle at the crest of the
modulation envelope taken under normal operating conditions
precrash: time before the crash occurs when safety mechanism are deployed
radome: external protective cover which is independent of the associated antenna, and which may contribute to the
overall performance of the antenna (and hence, the EUT)
3.2 Symbols
For the purposes of the present document, the following symbols apply:
DT Dwell Time
E Field strength
f Carrier frequency
c
FMCW Frequency Modulation Continuous Wave (transmission)
G Antenna gain
a
NB Narrow Band
P Radiated power
rad
R Distance
RSM Radar Speed Meters
R Reference distance
o
Rx Receiver
T Dwell time
dw
Tx Transmitter
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ac alternating current
AC Anti-Collision systems
ACC Automotive Cruise Control,
dB decibel
DC Direct Current
DT0 Average dwell time value
e.i.r.p. equivalent isotropically radiated power
ECC Electronic Communications Committee
EMC Electro Magnetic Compatibility
ERC European Radiocommunication Committee
EUT Equipment Under Test
FFT Fast Forward Transfer
FH Frequency Hopping
f the frequency of the upper marker resulting from the OBW function

H
f the frequency of the lower marker resulting from the OBW function

L
FMCW Frequency Modulated Continuous Wave
ETSI

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9 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
IF Intermediate Frequency
LNA Low Noise Amplifier
NB SRR Narrow Band Short Range Radar
OBW Occupied BandWidth
R&TTE Radio and Telecommunications Terminal Equipment
RF Radio Frequency
RTTT Road Tran
...

SLOVENSKI STANDARD
oSIST prEN 302 858-1 V1.1.1:2010
01-junij-2010
(OHNWURPDJQHWQD]GUXåOMLYRVWLQ]DGHYHY]YH]L]UDGLMVNLPVSHNWURP(50
&HVWQDWUDQVSRUWQDLQSURPHWQDWHOHPDWLND57775DGDUVNDRSUHPDNUDWNHJD
GRVHJDNLGHOXMHYIUHNYHQþQHPREPRþMXRG*+]GR*+]GHO
7HKQLþQHNDUDNWHULVWLNHLQSUHVNXVQHPHWRGH
Electromagnetic compatibility and Radio spectrum Matters (ERM) - Road Transport and
Traffic Telematics (RTTT) - Short range radar equipment operating in the 24,05 GHz to
24,25 GHz frequency range for automotive application - Part 1: Technical characteristics
and test methods
Ta slovenski standard je istoveten z: EN 302 858-1 Version 1.1.1
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
35.240.60 Uporabniške rešitve IT v IT applications in transport
transportu in trgovini and trade
oSIST prEN 302 858-1 V1.1.1:2010 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 302 858-1 V1.1.1:2010

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oSIST prEN 302 858-1 V1.1.1:2010

Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Road Transport and Traffic Telematics (RTTT);
Short range radar equipment operating in the 24,05 GHz to
24,25 GHz frequency range for automotive application;
Part 1: Technical characteristics and test methods

---------------------- Page: 3 ----------------------
oSIST prEN 302 858-1 V1.1.1:2010
 2 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)



Reference
DEN/ERM-TGSRR-051-1
Keywords
radar, radio, RTTT, SRD, testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2010.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

---------------------- Page: 4 ----------------------
oSIST prEN 302 858-1 V1.1.1:2010
 3 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
Contents
Intellectual Property Rights . 5
Foreword . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definitions, symbols and abbreviations . 7
3.1 Definitions . 7
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Equipment under test . 9
4.1 Presentation of equipment for testing purposes . 9
4.1.1 Choice of model for testing . 9
4.2 Mechanical and electrical design . 9
4.3 Auxiliary test equipment . 10
5 Test conditions, power sources and ambient temperatures . 10
5.1 Normal and extreme test conditions . 10
5.2 External test power source. 10
5.3 Normal test conditions . 10
5.3.1 Normal temperature and humidity . 10
5.3.2 Normal test power source . 10
5.3.2.1 Test equipment voltage and nominal test voltage . 10
5.3.2.2 Other power sources . 11
5.4 Extreme test conditions . 11
5.4.1 Extreme temperatures . 11
5.4.1.1 Procedure for tests at extreme temperatures . 11
5.4.1.2 Extreme temperature ranges . 11
5.4.2 Extreme test source voltages . 11
5.4.2.1 Mains voltage . 11
5.4.2.2 Other power sources . 11
6 Measurement setup . 11
6.1 Test sites and general arrangements for radiated measurements . 11
6.2 Test fixture . 12
6.2.1 Characteristics . 12
6.2.2 Validation of the test fixture in the temperature chamber . 13
6.2.3 Use of the test fixture for measurement in the temperature chamber . 14
6.3 RF cables . 15
6.4 Measuring receiver . 15
6.4.1 Frequency-selective voltmeter or spectrum analyzer . 15
6.4.2 Signal analyzer . 16
6.4.3 Amplitude calibration . 16
7 Limits for transmitter parameters and methods of measurements . 17
7.1 Introduction . 17
7.2 Frequency, power limits and spectrum access conditions . 17
7.3 Permitted range of operating frequencies . 19
7.3.1 Definition . 19
7.3.2 Method of measurement . 19
7.3.3 Limits . 20
7.4 Maximum radiated peak power (e.i.r.p.) . 20
7.4.1 Definition . 20
7.4.2 Method of measurement . 20
7.4.3 Limits . 21
ETSI

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oSIST prEN 302 858-1 V1.1.1:2010
 4 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
7.5 Dwell time and repetition time . 21
7.5.1 Definition . 21
7.5.2 Methods of measurement . 21
7.5.2.1 Signal analysis measurement . 21
7.5.2.2 Measurement of dwell time for a single dwell time event per 40 kHz in 3 ms (category C1) . 23
7.5.2.3 Measurement of cumulated dwell time for more than one dwell time event per 40 kHz in 3 ms
(category C2) . 24
7.5.2.3.1 Statistical measurement procedure . 24
7.5.2.3.2 Verification procedure . 25
7.5.2.4 Measurement of absolute dwell time per 40 kHz (category D) . 26
7.5.2.5 Measurement of repetition time for absolute dwell times per 40 kHz (category D) . 28
7.5.3 Limits . 29
7.6 Frequency modulation range . 29
7.6.1 Definition . 29
7.6.2 Method of measurement . 29
7.6.3 Limits . 30
7.7 Radiated spurious emissions. 30
7.7.1 Definition . 30
7.7.2 Method of measurement . 30
7.7.3 Limits . 30
8 Methods of measurement and limits for receiver parameters . 31
8.1 Receiver spurious emissions. 31
8.1.1 Definition . 31
8.1.2 Method of measurement - radiated spurious emissions . 31
8.1.3 Limit . 32
9 Interpretation of test results and measurement uncertainty . 32
9.1 Interpretation of the measurement results . 32
9.2 Absolute measurement uncertainty . 32
Annex A (normative): Radiated measurements . 33
A.1 General requirements for measurements involving the use of radiated fields. 33
A.2 Test Sites . 34
A.2.1 Outdoor test site . 34
A.2.2 Indoor test site . 35
A.2.3 Shielded anechoic test site . 36
A.2.3.1 Influence of parasitic reflections in anechoic chambers . 36
A.2.3.2 Calibration of the shielded RF anechoic chamber . 36
A.3 Antennas . 38
A.3.1 Test antenna . 38
A.3.2 Substitution antenna . 38
A.3.3 Artificial antenna . 38
A.4 Test practice and auxiliary test equipment . 39
A.5 Measuring distance . 39
A.5.1 Standard position . 39
A.5.2 Auxiliary cables . 39
Annex B (normative): Installation requirements . 40
B.1 Installation requirements of 24 GHz Narrow Band Short Range Radar (NB SRR) systems . 40
Annex C (informative): Conversion of power density to e.i.r.p. 41
C.1 Assumptions . 41
C.2 Example . 41
Annex D (informative): Bibliography . 42
History . 43
ETSI

---------------------- Page: 6 ----------------------
oSIST prEN 302 858-1 V1.1.1:2010
 5 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM), and is now submitted for the Public Enquiry phase
of the ETSI standards Two-step Approval Procedure.
For non EU countries the present document may be used for regulatory (Type Approval) purposes.
Equipment compliant with the present document is intended for fitment into road vehicles, therefore it is subject to
automotive EMC type approval and needs to comply with Directive 95/54/EC [i.3].
For use on vehicles outside the scope of Directive 95/54/EC [i.3] compliance with an EMC directive/standard
appropriate for that use is required.
The present document is part 1 of a multi-part deliverable covering Electromagnetic compatibility and Radio spectrum
Matters (ERM); Road Transport and Traffic Telematics (RTTT); Short range radar equipment operating in the
24,05 GHz to 24,25 GHz frequency range for automotive application, as identified below:
Part 1: "Technical characteristics and test methods";
Part 2: "Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive".

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

ETSI

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oSIST prEN 302 858-1 V1.1.1:2010
 6 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
1 Scope
The present document specifies the technical requirements and methods of measurement for Short Range Devices
(SRD) operating in the 24,05 GHz to 24,25 GHz frequency range intended for Narrow Band Short Range Radar (NB
SRR) for Road Transport and Traffic Telematics (RTTT) applications such as Automotive Cruise Control (ACC),
Collision Warning, Anti-Collision (AC) systems, obstacle detection, Stop and Go, blind spot detection, parking aid,
precrash, backup aid and other safety relevant automotive applications.
The present document contains the technical characteristics and test methods for narrowband short range radar
equipment fitted with integral antennas and applies to transmitters and receivers with integral antennas operating in all
or part of the range from 24,05 GHz to 24,25 GHz.
The present document does not necessarily include all the characteristics which may be required by a user, nor does it
necessarily represent the optimum performance achievable.
The present document covers only NB SRR equipment for vehicles.
The present document complies with field limits for human exposure to electromagnetic fields as provided by the
EC Recommendation 1999/519/EC [i.4] and the methods for compliance demonstration in EN 50371 [i.5].
Table 1 shows the frequency bands as designated to narrow band short range radar devices.
Table 1: Narrow band short range radar devices frequency of operation
Frequency Bands/frequencies Applications
Transmit and Receive 24,05 GHz to 24,25 GHz Short range radar for vehicle applications

2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] CISPR 16 (2006) (parts 1-1, 1-4 and 1-5): "Specification for radio disturbance and immunity
measuring apparatus and methods; Part 1: Radio disturbance and immunity measuring apparatus".
[2] ETSI TR 100 028 (V1.4.1) (all parts): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Uncertainties in the measurement of mobile radio equipment characteristics".
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oSIST prEN 302 858-1 V1.1.1:2010
 7 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
[3] ETSI TR 102 273 (V1.2.1) (all parts): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the
corresponding measurement uncertainties".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] CEPT/ERC Recommendation 70-03: "Relating to the use of Short Range Devices (SRD)".
[i.2] CEPT/ECC Report #134 on analysis of potential impact of mobile Vehicle Radars (VR) on Radar
Speed Meters (RSM) operating at 24 GHz.
[i.3] Commission Directive 95/54/EC of 31 October 1995 adapting to technical progress Council
Directive 72/245/EEC on the approximation of the laws of the Member States relating to the
suppression of radio interference produced by spark-ignition engines fitted to motor vehicles and
amending Directive 70/156/EEC on the approximation of the laws of the Member States relating
to the type-approval of motor vehicles and their trailers.
[i.4] Council Recommendation 1999/519/EC of 12 July 1999 on the limitation of exposure of the
general public to electromagnetic fields (0 Hz to 300 GHz).
[i.5] CENELEC EN 50371 (2002): "Generic standard to demonstrate the compliance of low power
electronic and electrical apparatus with the basic restrictions related to human exposure to
electromagnetic fields (10 MHz - 300 GHz) - General public".
[i.6] CEPT/ERC/REC 74-01: "Unwanted emissions in the spurious domain".
[i.7] ITU-R Recommendation SM.328-10: "Spectra and Bandwidth of Emissions".
[i.8] ITU-R Recommendation SM.329: "Variation of the boundary between the out-of-band and
spurious domains".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
assigned frequency band: frequency band within which the device is authorized to operate
boresight: axis of the main beam in a directional antenna
bumper: generally 3D shaped plastic sheet normally mounted in front of the NB SRR
co-located receiver: receiver is located in the same module box as the transmitter
duty cycle: ratio of the total on time of the "message" to the total off-time in any one hour period
NOTE: The device may be triggered either automatically or manually, whether the duty cycle is fixed or random
depends on how the device is triggered.
dwell time: in general, a time interval for which a certain frequency range is occupied
NOTE: "Cumulated dwell time" is the sum of individual dwell times within a measurement time frame
and in a defined frequency range.
"Absolute dwell time" is the time from first entrance into a defined frequency range until last exit from a
defined frequency range.
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oSIST prEN 302 858-1 V1.1.1:2010
 8 Draft ETSI EN 302 858-1 V1.1.1 (2010-04)
Equipment Under Test (EUT): radar sensor including the integrated antenna together with any external antenna
components which affect or influence its performance
equivalent isotropically radiated power (e.i.r.p.): total power or power density transmitted, assuming an isotropic
radiator
NOTE: e.i.r.p. is conventionally the product of "power or power density into the antenna" and "antenna gain".
e.i.r.p. is used for both peak or average power and peak or average power density.
2
far field measurement: measurement at a distance "X" of at least 2d /λ , where d is the largest dimension of the
antenna aperture of the EUT
operating frequency (operating centre frequency): nominal frequency at which equipment is operated
power envelope: power supplied to the antenna by a transmitter during one radio frequency cycle at the crest of the
modulation envelope taken under normal operating conditions
precrash: time before the crash occurs when safety m
...