IEEE-521-2002.pdf
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1、IEEE Std 521-2002 (Revision of IEEE Std 521-1984) IEEE Standards 521 TM IEEE Standard Letter Designations for Radar-Frequency Bands Published by The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA 8 January 2003 IEEE Aerospace +1 978 750 8400. Perm
2、ission to photocopy portions of any individual standard for educational classroom use can also be obtained through the Copyright Clearance Center. Note: Attention is called to the possibility that implementation of this standard may require use of subject mat- ter covered by patent rights. By public
3、ation of this standard, no position is taken with respect to the existence or validity of any patent rights in connection therewith. The IEEE shall not be responsible for identifying patents for which a license may be required by an IEEE standard or for conducting inquiries into the legal validity o
4、r scope of those patents that are brought to its attention. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 08:36:05 MDTNo reproduction or networking permitted witho
5、ut license from IHS -,-,- Copyright 2003 IEEE. All rights reserved.iii Introduction (This introduction is not part of IEEE Std 521-2002, IEEE Standard for Letter Designations for Radar-Frequency Bands.) The Standard Letter Designations for Radar-Frequency Bands was first issued in 1976 and was writt
6、en to remove the confusion which developed from the misapplication to radar of letter band designations of other microwave frequency users. This standard relates the letter terms in common usage to the frequency ranges that they represent. The 1984 revision defined the application V and W to a porti
7、on of the millimeter wave region while retaining the previous letter designators for frequencies below the millimeter region. This revi- sion keeps the same letter band designations, includes a change in the definition of millimeter wave frequen- cies to conform to the ITU designation, and revises t
8、he notes to Table 1. The Standard Letter Designations for Radar-Frequency Bands issued in 1976 and revised in 1984 listed the specific frequency ranges for radar only for Region 2 in Table 1. Table 1 has been modified for international application by including Regions 1 and 3 in addition to Region 2
9、. Participants At this time this standard was completed, the IEEE Aerospace for example, VHF (216225 MHz) or L-band (1.2151.4 GHz). 3. Relation to other nomenclature The radar letter designations are consistent with the recommended nomenclature of the ITU, as shown in Table 2. Note that the high fre
10、quency (HF) and the very high frequency (VHF) definitions are identical in the Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 08:36:05 MDTNo reproduction or network
11、ing permitted without license from IHS -,-,- IEEE Std 521-2002IEEE STANDARD FOR 2Copyright 2003 IEEE. All rights reserved. two systems. The essence of the radar nomenclature is to subdivide the existing ITU bands, in accordance with radar practice, without conflict or ambiguity. The letter band desi
12、gnations should not be construed as being a substitute for the specific frequency limits of the frequency bands. The specific frequency limits should be used when appropriate, but when a letter desig- nation of a radar-frequency band is called for, those of Table 1 shall be used. The letter designat
13、ions described in this standard are designed for radar usage and are used in current prac- tice. They are not meant to be used for other radio or telecommunication purposes, unless they pertain to radar. The letter designations for electronic countermeasure operations, as described in Air Force Regu
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