1、 Recommendation ITU-R M.1802-1(04/2010)Characteristics and protection criteria for radars operating in the radiolocation service in the frequency band 30-300 MHzM SeriesMobile, radiodetermination, amateurand related satellite servicesii Rec. ITU-R M.1802-1 Foreword The role of the Radiocommunication
2、 Sector is to ensure the rational, equitable, efficient and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and po
3、licy functions of the Radiocommunication Sector are performed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO
4、/IEC referenced in Annex 1 of Resolution ITU-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC
5、 and the ITU-R patent information database can also be found. Series of ITU-R Recommendations (Also available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broad
6、casting service (television) F Fixed service M Mobile, radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-s
7、atellite and fixed service systems SM Spectrum management SNG Satellite news gathering TF Time signals and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publicatio
8、n Geneva, 2010 ITU 2010 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R M.1802-1 1 RECOMMENDATION ITU-R M.1802-1 Characteristics and protection criteria for radars operating in the radiolocation service in the
9、 frequency band 30-300 MHz (Question ITU-R 237/5) (2007-2010) Scope This Recommendation describes VHF radiodetermination radars and provides technical parameters and protection criteria for some type of radars operating in the band 30-300 MHz. The ITU Radiocommunication Assembly, considering a) that
10、 technical characteristics of radars operating in the radiodetermination service depend on specific applications, and could significantly vary, even within the same frequency band; b) that within different ITU Regions as well as in different countries certain frequency bands in the range 30-300 MHz
11、are allocated to the radiodetermination service; c) that the VHF range provides unique capabilities for detecting objects at a very large distance, that is the most suitable for tracking and identification of space objects; d) that analysis of frequency sharing between radiodetermination radars and
12、systems in other services and determination of the feasibility of implementing new types of radiodetermination radars and to select appropriate frequency bands require knowledge of technical and operational characteristics of the systems operating in a specific frequency band, recommends 1 that tech
13、nical and operational characteristics and protection criteria of the radiolocation radars described in Annex 1 should be considered representative of those systems operating in the frequency range 30-300 MHz and used in studies of compatibility with systems in other services; 2 that Recommendation I
14、TU-R M.1461 should be used as a guideline in analysing compatibility between radars operating in the radiodetermination service with systems in other services. Annex 1 Technical and operational characteristics and protection criteria of radar systems operating in the frequency range 30-300 MHz 1 Int
15、roduction Representative characteristics of radiolocation radars operating in the frequency range 30-300 MHz are shown in Table 1. This information is required for assessment of compatibility between radars and systems in other services. 2 Rec. ITU-R M.1802-1 2 Technical characteristics The frequenc
16、y range 30-300 MHz is used by several different types of radars on fixed platforms within different ITU Regions as well as in different countries. Radiolocation functions performed in the band are space object recognition and tracing. TABLE 1 Characteristics of radars operating in the frequency rang
17、e 30-300 MHz Parameter Value Radar Radar Radar C Radar type Primary ranging radar Primary ranging radar (bi-static) Radar purpose Space object recognition and tracing Frequency band (MHz) 154-156 142-144 Relative frequency instability 10111011N/AOutput pulse power (min/max) (dBW) 27/46 40/46 47.2 Me
18、an output power (min/max) (dBW) 22/41 35/41 47.2 Polarization Linear Pulse duration (s) 13 000 3 200 N/A Duty cycle 0.322 N/A Modulation type Pulse Continuous WaveAltitude above the ground level (m) 19 5 Antenna type Phased array Maximum antenna gain (dB) transmitter receiver 25 30 24 N/A Maximum an
19、tenna gain on the horizon (dB) 9 12 Main beam pattern (degrees) horizontal plane (Rx/Tx) vertical plane (Rx/Tx) 2.6/5.2 2.6/2.6 8 20 Scan angle ranges (degrees): horizontal plane vertical plane 0-360 2-70 4 sectors covering: 0-180 30 Receiver noise temperature (K) 800 N/A Operational receiver passband (kHz) 0.132 625 50 Necessary bandwidth (kHz) 0.132 625 1 Emission class P0N MXN N0N I/N protection ratio (dB) 6 NOTE 1 N/A not applicable.
