SIST EN 302 085 V1.2.3:2006

• Abstract:

  The present document specifies the essential electrical requirements for linear polarization, fixed beam antennas to be utilized with new Point-to-Multipoint (P-MP) systems, including central station and terminal station applications, operating in frequency bands from 3 GHz to 11 GHz. These systems use various multiple access schemes. Electronically steerable antennas and circularly polarized antennas are not considered in the present document. Only in exceptional circumstances, and after a consultation period with operators and manufacturers, the Regulatory Authority may impose the use of tighter requirements than the minimum values given in the present document, in order to maximize the use of scarce spectrum resources. For some high gain, point-to-multipoint requirements, antennas may be used having performance as per the appropriate point-to-point antenna standard. For these antennas, minimum requirements are given in EN 300 833 [8].

• Status: Published
• Publication Date: 28-Feb-2006
• ICS: 33.060.30 - Radio relay and fixed satellite communications systems
• ICS: 33.120.40 - Aerials
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Mar-2006
• Due Date: 01-Mar-2006
• Completion Date: 01-Mar-2006
• Ref Project: ETSI EN 302 085 V1.2.3 (2005-09) - Fixed Radio Systems; Point-to-Multipoint Antennas; Antennas for point-to-multipoint fixed radio systems in the 3 GHz to 11 GHz band

SIST EN 302 085 V1.2.3:2006 is the Slovenian adoption of ETSI EN 302 085 V1.2.3 for fixed radio systems. It specifies the essential electrical requirements for linear-polarization, fixed-beam antennas used in new Point-to-Multipoint (P-MP) systems in the 3 GHz to 11 GHz band, for Central Station, Terminal Station and Repeater Station use. The standard is used by antenna designers, suppliers, operators, purchasers, test labs and regulators who need a common basis for antenna performance and frequency coordination.

What does SIST EN 302 085 V1.2.3:2006 specify?

SIST EN 302 085 V1.2.3:2006 specifies the essential electrical requirements for fixed-beam antennas used with new P-MP systems in the 3 GHz to 11 GHz range. It is focused on antenna performance that affects coordination between services and practical spectrum use.

The scope is limited to linear polarization and excludes electronically steerable antennas and circularly polarized antennas. For some high-gain P-MP cases, the standard points to the appropriate point-to-point antenna standard, EN 300 833, for minimum requirements.

The document is organized into these main clauses and annexes:

• Clause 1 - Scope
• Clause 2 - References
• Clause 3 - Definitions, symbols and abbreviations
• Clause 4 - Frequency bands
• Clause 5 - Types and classification of antennas
• Clause 6 - Electrical characteristics
• Clause 7 - Conformance tests
• Annex A - Informative antenna characteristics
• Annex B - Bibliography

Annex	What it covers
Annex A	Informative guidance on environmental and mechanical characteristics, connectors, VSWR, inter-port isolation, labelling and PIM
Annex B	Bibliography and related standards

What are the key requirements of SIST EN 302 085 V1.2.3:2006?

SIST EN 302 085 V1.2.3:2006 sets class-based radiation pattern limits and minimum gain values for TS and CS antennas. In practice, the standard tells you what pattern shape, gain and polarization behavior the antenna must meet for the declared type, class and frequency range.

TS antenna requirements

Clause 6.1 requires TS antennas to meet the Radiation Pattern Envelope (RPE) limits for both azimuth and elevation. The class depends on the frequency range, and the tables in the clause define separate co-polar and cross-polar limits. This matters because a manufacturer must test the antenna against the right class for the intended band, not just against a generic pattern.

Clause 6.1.2 also sets a minimum boresight gain using the formula ROUND(0,85 f + 5) dBi, where f is the nominal centre frequency in GHz. This gives a frequency-dependent gain floor, so the antenna has enough directivity for the intended link budget.

CS sectored single-beam requirements

Clause 6.2 covers sectored CS antennas with beamwidths from 15° to 180° and classes CS 1, CS 2 and CS 3. The supplier declares the sector angle, and the azimuth pattern limits are given for both co-polar and cross-polar behavior. In practice, this means the antenna must fit the declared sector and cannot spill energy outside the allowed envelope.

Clause 6.2.2 also sets minimum boresight gain values as a function of sector angle. The gain requirement is higher for narrower sectors, which matters when choosing antennas for denser cell layouts or tighter coverage planning.

CS sectored multi-beam requirements

Clause 6.3 covers multi-beam CS antennas, where several beams share one aperture. The standard defines classes CSMB 1 and CSMB 2, with declared sector angle, beamwidth and reference beam direction. This is important when one physical antenna carries several independently used beams and each beam must be checked on its own.

Clause 6.3.2 sets minimum boresight gain for each beam over beamwidths from 10° to 90°. This gives a practical check for multi-beam designs that trade compact size against beam performance.

Omni-directional, elevation and polarization rules

Clause 6.4 sets requirements for omni-directional CS antennas: minimum nominal gain, maximum azimuth ripple and minimum cross-polar discrimination. Clause 6.5 gives two elevation RPE cases, one symmetric and one asymmetric, and explains how tilt shifts the elevation pattern. This matters for installations where the antenna is aimed to match terrain and cell coverage.

Clauses 6.6 and 6.7 require linear polarization and state that radomes must be in place when the antenna is tested or assessed. In practice, the radome is part of the antenna performance, so the measured pattern and gain must still meet the limits with the cover fitted.

Conformance testing

Clause 7 states that EN 301 126-3-2 applies for conformance tests. That means antenna verification is not just a design exercise - it is tied to a defined test procedure for P-MP antennas.

What terms does SIST EN 302 085 V1.2.3:2006 define?

• Central Station (CS) - A base station that communicates two-way with many terminal stations and, in many cases, repeater stations.
• Terminal Station (TS) - A remote station that communicates with a central station.
• Repeater Station (RS) - A radio station that provides the air interface to both the central station and the terminal station(s), and may also provide subscriber interfaces.
• Radiation Pattern Envelope (RPE) - The limit within which the measured radiation pattern must fit.
• Boresight - The axis of the main beam in a directional antenna.
• Half Power BeamWidth (HPBW) - The angle between the two directions where the co-polar pattern is 3 dB below the main beam axis.
• Cross-polar discrimination - The difference between the co-polarized main beam peak and the maximum cross-polarized signal in a defined region.
• Radome - A dielectric cover intended to protect the antenna from the physical environment.

Who uses SIST EN 302 085 V1.2.3:2006?

SIST EN 302 085 V1.2.3:2006 is used by antenna manufacturers, RF engineers, system integrators, operators, regulators and purchasers involved in fixed P-MP deployments in the 3 GHz to 11 GHz bands. It helps them agree on antenna class, beamwidth, polarization, gain and radiation pattern behavior.

Test laboratories use it to check pattern, gain and polarization performance against the class limits. Procurement and quality teams use it when agreeing practical items such as connectors, VSWR, inter-port isolation, labelling, environmental robustness and PIM with suppliers.

Which standards are used with SIST EN 302 085 V1.2.3:2006?

The standard cites these references and uses them for channel planning, environmental conditions, conformance testing and component interfaces:

• CEPT Recommendation T/R 13-02 - channel arrangements for fixed services in the 22.0 GHz to 29.5 GHz range, cited for frequency planning context.
• CEPT/ERC/REC 12-05 - harmonised radio frequency channel arrangements for digital terrestrial fixed systems in the 10.0 GHz to 10.68 GHz band.
• CEPT/ERC/REC 14-03 - harmonised radio frequency channel arrangements for low and medium capacity systems in the 3400 MHz to 3600 MHz band.
• ITU-R Recommendation F.747 - radio-frequency channel arrangements for fixed wireless systems in the 10 GHz band.
• ITU-R Recommendation F.748 - radio-frequency arrangements for fixed service systems in the 25, 26 and 28 GHz bands.
• WRC 2000 Final Acts - spectrum planning context for the band limits used in the document.
• ETSI ETS 300 019-1-4 - environmental conditions and tests for stationary use at non-weatherprotected locations.
• ETSI EN 300 833 - point-to-point antenna standard used for some high-gain P-MP cases.
• ETSI EN 301 126-3-2 - conformance testing definitions, general requirements and test procedures for P-MP antennas.
• IEC 60154-1 and IEC 60154-2 - flange requirements for waveguide interfaces.
• IEC 60169 - requirements and measuring methods for RF connectors.

What does the SIST EN 302 085 V1.2.3:2006 document contain?

Clause 6 is the technical core of the document. It provides normalized RPE templates, class definitions and minimum gain rules for TS antennas, CS sectored single-beam antennas, CS sectored multi-beam antennas and CS omni-directional antennas.

The document includes figures that show the normalized azimuth and elevation templates, plus tables that define the class points and their relative gain limits. It also includes a formula for TS minimum boresight gain and gain-versus-sector-angle plots for CS antennas.

Annex A adds practical guidance on environmental conditions, antenna stability, connectors, VSWR, inter-port isolation, labelling and PIM. Annex B lists related literature for design, testing and conformity work.

SLOVENSKI STANDARD
01-marec-2006
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VLVWHPHWLSDWRþNDYHþWRþNYREPRþMXRG*+]GR*+]
Fixed Radio Systems; Point-to-Multipoint Antennas; Antennas for point-to-multipoint fixed
radio systems in the 3 GHz to 11 GHz band
Ta slovenski standard je istoveten z: EN 302 085 Version 1.2.3
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
33.120.40 Antene Aerials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)

Fixed Radio Systems;
Point-to-Multipoint Antennas;
Antennas for point-to-multipoint fixed radio systems
in the 3 GHz to 11 GHz band
2 ETSI EN 302 085 V1.2.3 (2005-09)

Reference
REN/TM-04168
Keywords
DRRS, radio, antenna, multipoint, CDMA, FDMA,
RLL, TDMA, transmission
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© European Telecommunications Standards Institute 2005.
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ETSI
3 ETSI EN 302 085 V1.2.3 (2005-09)
Contents
Intellectual Property Rights.5
Foreword.5
Introduction .5
1 Scope.6
2 References.6
3 Definitions, symbols and abbreviations .7
3.1 Definitions.7
3.2 Symbols.8
3.3 Abbreviations.8
4 Frequency bands.8
5 Types and classification of antennas.9
5.1 Antenna types.9
5.2 Antenna classifications.9
5.2.1 CS classes.9
5.2.2 TS classes.10
6 Electrical characteristics.10
6.1 Terminal Station (TS) antennas.10
6.1.1 TS Radiation Pattern Envelope (RPE).10
6.1.1.1 Range 1 (3,0 GHz to 5,9 GHz).11
6.1.1.2 Range 2 (5,9 GHz to 8,5 GHz).13
6.1.1.3 Range 3 (8,5 GHz to 11,0 GHz).14
6.1.2 TS minimum boresight gain .15
6.2 Central Station (CS) sectored single beam antennas .15
6.2.1 CS azimuth Radiation Pattern Envelope (RPE), sectored.15
6.2.1.1 Class CS 1 .16
6.2.1.2 Class CS 2 .16
6.2.1.3 Class CS 3 .17
6.2.2 Minimum boresight gain, sectored .17
6.3 Central Station (CS) sectored multi-beam antennas.18
6.3.1 CS azimuth Radiation Pattern Envelope (RPE), sectored.18
6.3.1.1 Range 1 (3 GHz to 5,9 GHz).18
6.3.1.2 Class CSMB 1.18
6.3.1.3 Class CSMB 2.19
6.3.2 Minimum boresight gain, multi-beam .20
6.4 Central Station (CS) omni-directional antennas .21
6.5 Central Station (CS) omni and sectored elevation RPEs.21
6.5.1 Symmetric elevation RPEs .21
6.5.2 Asymmetric elevation patterns .22
6.6 Polarization, Terminal (TS) and Central (CS) Stations .23
6.7 Radomes.23
7 Conformance tests.23
Annex A (informative): Antenna characteristics.24
A.1 Mechanical characteristics.24
A.1.1 Environmental characteristics.24
A.1.2 Antenna stability.24
A.2 Antenna input connectors.24
A.3 VSWR at the input port(s).25
A.4 Inter-port isoIation.25
ETSI
4 ETSI EN 302 085 V1.2.3 (2005-09)
A.5 Antenna labelling.25
A.6 Passive intermodulation performance .25
Annex B (informative): Bibliography.26
History .27

ETSI
5 ETSI EN 302 085 V1.2.3 (2005-09)
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 Transmission
and Multiplexing (TM).
The purpose of the present document is to define the antenna performance standards necessary to ensure optimum
frequency co-ordination between the systems and/or different services by the Regulatory Authorities in the 3 GHz to
11 GHz band. These nominal frequency limits have been chosen to reflect the WRC 2000 Final Acts [6] and the
frequency plans as given in CEPT Recommendation T/R 13-02 [1] and ITU-R Recommendation F.748 [5].
Point-to-multipoint antennas, whether integrated within station equipment or not, may need to meet environmental,
mechanical and electrical characteristics not covered by the present document, in order that the systems will operate as
intended. Additional parameters and characteristics may be subject to agreement between the equipment purchaser and
the supplier; these are considered and guidance is provided in annex A.

National transposition dates
Date of latest announcement of this EN (doa): 31 December 2005
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 June 2006
Date of withdrawal of any conflicting National Standard (dow): 30 June 2006

Introduction
The purpose of the present document is to define the requirements for antennas used in conjunction with
Point-to-MultiPoint (P-MP) systems necessary to facilitate frequency co-ordination between services in the frequency
bands 3 GHz to 11 GHz.
ETSI
6 ETSI EN 302 085 V1.2.3 (2005-09)
1 Scope
The present document specifies the essential electrical requirements for linear polarization, fixed beam antennas to be
utilized with new Point-to-Multipoint (P-MP) systems, including central station and terminal station applications,
operating in frequency bands from 3 GHz to 11 GHz. These systems use various multiple access schemes.
Electronically steerable antennas and circularly polarized antennas are not considered in the present document.
Only in exceptional circumstances, and after a consultation period with operators and manufacturers, the Regulatory
Authority may impose the use of tighter requirements than the minimum values given in the present document, in order
to maximize the use of scarce spectrum resources.
For some high gain, point-to-multipoint requirements, antennas may be used having performance as per the appropriate
point-to-point antenna standard. For these antennas, minimum requirements are given in EN 300 833 [8].
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• 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.
• For a non-specific reference, the latest version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
[1] CEPT Recommendation T/R 13-02: "Preferred channel arrangements for fixed services in the
range 22.0 - 29.5 GHz".
[2] CEPT/ERC/REC 12-05: "Harmonised radio frequency channel arrangements for digital terrestrial
fixed systems operating in the band 10.0 - 10.68 GHz".
[3] CEPT/ERC/REC 14-03: "Harmonised radio frequency channel arrangements for low and medium
capacity systems in the band 3400 MHz to 3600 MHz".
[4] ITU-R Recommendation F.747: "Radio-frequency channel arrangements for fixed wireless
systems operating in the 10 GHz band".
[5] ITU-R Recommendation F.748: "Radio-frequency arrangements for systems of the fixed service
operating in the 25, 26 and 28 GHz bands".
[6] Final Acts - WRC - 2000, Istanbul.
[7] ETSI ETS 300 019-1-4: "Equipment Engineering (EE); Environmental conditions and
environmental tests for telecommunications equipment; Part 1-4: Classification of environmental
conditions; Stationary use at non-weatherprotected locations".
[8] ETSI EN 300 833: "Fixed Radio Systems; Point-to-point antennas; Antennas for point-to-point
fixed radio systems operating in the frequency band 3 GHz to 60 GHz".
[9] ETSI EN 301 126-3-2: "Fixed Radio Systems; Conformance testing; Part 3-2: Point-to-Multipoint
antennas - Definitions, general requirements and test procedures".
[10] IEC 60154-1: "Flanges for waveguides. Part 1: General requirements".
[11] IEC 60154-2: "Flanges for waveguides. Part 2: Relevant specifications for flanges for ordinary
rectangular waveguides".
ETSI
7 ETSI EN 302 085 V1.2.3 (2005-09)
[12] IEC 60169 (part 1 and applicable subparts): "Radio-frequency connectors. Part 1: General
requirements and measuring methods".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
antenna: that part of the transmitting or receiving system that is designed to transmit or receive electromagnetic
radiation
boresight: axis of the main beam in a directional antenna
Central Station (CS): base station which communicates each way with many terminal stations and, in many cases,
repeater stations
co-polar pattern: diagram representing the radiation pattern of a test antenna when the reference antenna is similarly
polarized, scaled in dBi or dB relative to the measured antenna gain
cross-polar pattern: diagram representing the radiation pattern of a test antenna when the reference antenna is
orthogonally polarized, scaled in dBi, or dB relative to the measured antenna gain
cross-polar discrimination: difference between the peak of the co-polarized main beam and the maximum
cross-polarized signal over an angle measured within a defined region
fixed beam: radiation pattern in use is fixed relative to a defined mechanical reference plane
gain: ratio of the radiation intensity in a given direction to the radiation intensity that would be obtained if the power
accepted by the antenna was radiated isotropically
Half Power BeamWidth (HPBW): angle, relative to the main beam axis, between the two directions at which the
measured co-polar pattern is 3 dB below the value on the main beam axis
inter-port isolation: ratio in dB of the power level applied to one port of a multi-port antenna to the power level
received in any other port of the same antenna as a function of frequency
isotropic radiator: hypothetical, lossless antenna having equal radiation intensity in all directions
input port(s): flange(s) or connector(s) through which access to the antenna is provided
main beam axis: direction for which the radiation intensity is a maximum
main beam: radiation lobe containing the direction of maximum radiation
mechanical tilt: fixed angular shift in elevation of the antenna main beam axis by a change to the physical mounting
Radiation Pattern Envelope (RPE): envelope within which the radiation pattern shall fit
radiation pattern: diagram relating power flux density at a constant distance from the antenna to the direction relative
to the notional antenna main beam axis. Specifically referenced in EN 302 085 to the zero degree reference direction.
radome: cover, of dielectric material, intended for protecting an antenna from the effects of its physical environment
Repeater Station (RS): radio station providing the connection via the air to both the central station and the terminal
station(s). The remote station may also provide the interfaces to the subscriber equipment, if applicable.
sector angle: declared angle of coverage in azimuth of a sectored antenna, defined as 2α in EN 302 085
Terminal Station (TS): remote (out) station which communicates with a central station
tilt: fixed, angular shift of the antenna main beam axis (boresight) in the elevation plane by either electrical, electronic
or mechanical means
ETSI
8 ETSI EN 302 085 V1.2.3 (2005-09)
zero degree (0°°°°): declared direction as referenced to the antenna
reference direction: mechanical characteristics, used as reference for the RPE
reference beam direction: mechanical characteristics, used as reference for every beam RPE (applicable only to
multi-beam antennae)
3.2 Symbols
For the purposes of the present document, the following symbols apply:
α Alpha (= half the sector angle)
ε reference beam direction
dBi Decibels relative to an isotropic source
f
0 Nominal centre frequency of declared antenna operating range
GHz GigaHertz
MHz MegaHertz
ROUND ( ) Round up or down to nearest integer
ABS( ) Absolute value of the number
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
CS Central Station
HPBW Half Power BeamWidth
P-MP Point-to-MultiPoint
PIM Passive InterModulation
RPE Radiation Pattern Envelope
RS Repeater Station
TS Terminal Station
VSWR Voltage Standing Wave Ratio
4 Frequency bands
The present document applies to a number of frequency ranges within the 3 GHz to 11 GHz frequency bands considered
within CEPT/ERC and ETSI for allocation to the fixed services. Suitable sub-bands for allocation to point-to-multipoint
use are subject to channel plans described in references CEPT/ERC/REC 12-05 [2], CEPT/ERC/REC 14-03 [3] and
ITU-R Recommendation F.747 [4].
For the purpose of the present document, the overall frequency bands 3 GHz to 11 GHz are divided into three ranges as
follows:
range 1: 3,0 GHz to 5,9 GHz;
range 2: 5,9 GHz to 8,5 GHz;
range 3: 8,5 GHz to 11,0 GHz.
ETSI
9 ETSI EN 302 085 V1.2.3 (2005-09)
5 Types and classification of antennas
5.1 Antenna types
The present document addresses fixed beam antennas used in the Central (CS) and Terminal (TS) stations including
Repeaters (RS).
The antennas are used in a system which can generally be described as in figure 1.
TS
TS
Exchange
CS
RS
CS: Central Station, which is linked to all remote stations (repeater or terminal stations) by microwave
transmission paths.
TS: Terminal Station (outstation with subscriber interfaces).
RS: Repeater Station (radio repeater outstation with or without subscriber interfaces). A RS may serve one or
more TSs.
Figure 1: General point-to-multipoint system architecture
These antennas shall be grouped into the following types:
Central and repeater stations:
• Omni-directional;
• Sectored:
- Single-beam;
- Multi-beam;
• Directional, conforming to the requirements for TS antennas.
Terminal stations: Directional.
Repeater antennas can be of either Central (CS) or Terminal (TS) station types.
5.2 Antenna classifications
5.2.1 CS classes
With respect to the azimuthal Radiation Pattern Envelope (RPE), three classes may be identified in different frequency
sub-ranges for Central Station (CS) sectored antennas (CS1,CS2,CS3) and two classes may be identified for
multi-beam antennas (CSMB1,CSMB2):
• class CS 1;
ETSI
10 ETSI EN 302 085 V1.2.3 (2005-09)
• class CS 2;
• class CS 3;
• class CSMB1;
• class CSMB2.
These classes allow flexibility for a variety of different systems, and may be generally appropriate for low, medium and
higher density deployments respectively.
With respect to the azimuthal RPE for omni-directional CS antennas, no requirement for separate classes has been
identified.
5.2.2 TS classes
With respect to the radiation pattern envelope (RPE), a number of classes have been identified for Terminal Station
(TS)
...