1、IEEE Std 521-2002 (Revision of IEEE Std 521-1984) IEEE Standards521TMIEEE Standard Letter Designationsfor Radar-Frequency BandsPublished by The Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USA8 January 2003IEEE Aerospace +1 978 750 8400. Permission t
2、o photocopy portions of any individual standard for educationalclassroom 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 publication of th
3、is standard, no position is taken with respect to the existence orvalidity of any patent rights in connection therewith. The IEEE shall not be responsible for identifying patentsfor which a license may be required by an IEEE standard or for conducting inquiries into the legal validity orscope of tho
4、se patents that are brought to its attention.Copyright 2003 IEEE. All rights reserved. iiiIntroduction(This introduction is not part of IEEE Std 521-2002, IEEE Standard for Letter Designations for Radar-FrequencyBands.)The Standard Letter Designations for Radar-Frequency Bands was first issued in 19
5、76 and was written toremove the confusion which developed from the misapplication to radar of letter band designations of othermicrowave frequency users. This standard relates the letter terms in common usage to the frequency rangesthat they represent. The 1984 revision defined the application V and
6、 W to a portion of the millimeter waveregion 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
7、 revises the notes to Table 1. The Standard Letter Designations for Radar-Frequency Bands issued in 1976 and revised in 1984 listed thespecific frequency ranges for radar only for Region 2 in Table 1. Table 1 has been modified for internationalapplication by including Regions 1 and 3 in addition to
8、Region 2.ParticipantsAt this time this standard was completed, the IEEE Aerospace for example, VHF (216225 MHz) orL-band (1.2151.4 GHz).3. Relation to other nomenclatureThe radar letter designations are consistent with the recommended nomenclature of the ITU, as shown inTable 2. Note that the high f
9、requency (HF) and the very high frequency (VHF) definitions are identical in theIEEEStd 521-2002 IEEE STANDARD FOR 2 Copyright 2003 IEEE. All rights reserved.two systems. The essence of the radar nomenclature is to subdivide the existing ITU bands, in accordancewith radar practice, without conflict
10、or ambiguity.The letter band designations should not be construed as being a substitute for the specific frequency limits ofthe 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 sha
11、ll be used.The letter designations 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 toradar.The letter designations for electronic countermeasure operations, as
12、described in Air Force Regulation No.55-44, Army Regulation No. 105-86, and Navy OPNAV Instruction 3430.9B, are not consistent with radarpractice and shall not be used to describe radar-frequency bands.Table 1Standard radar-frequency letter band nomenclatureInternational tableBand designationNominal
13、 frequency rangeSpecific frequency ranges for radar based on ITU assignments (see Notes 1, 2)Region 1 Region 2 Region 3HF 330 MHz (Note 3)VHF 30300MHz None 138 144 MHz216 225 MHz(See Note 4)223-230 MHzUHF 3001000 MHz(Note 5)420450 MHz (Note 4)890942 MHz (Note 6)L 12 GHz 12151400 MHzS 24 GHz 23002500
14、 MHz27003600 MHz 27003700 MHzC 48 GHz 4200 4400 MHz (Note 7)52505850 MHz 52505925 MHzX 812 GHz 8.510.68 GHzKu 1218 GHz 13.414 GHz15.717.7 GHzK 1827 GHz 24.0524.25 GHz 24.0524.25 GHz24.6524.75 GHz(Note 8)24.0524.25 GHzKa 2740 GHz 33.436 GHzV 4075 GHz 5964 GHzW 75110 GHz 7681 GHz92100 GHzmm (Note 9)11
15、0300 GHz126142 GHz144149 GHz231235 GHz238248 GHz(Note 10)IEEELETTER DESIGNATIONS FOR RADAR-FREQUENCY BANDS Std 521-2002Copyright 2003 IEEE. All rights reserved. 3NOTES1These international ITU frequency allocations are from the table contained in Article S5 of the ITU Radio Regula-tions, 1998 Edition
16、 The ITU defines no specific service for radar, and the frequency assignments listed are derivedfrom those radio services that use radiolocation. The frequency allocations listed include those for both primary andsecondary service. The listings of frequency assignments are included for reference on
17、ly and are subject to change.2The specific frequency ranges for radiolocation are listed in the NTIA Manual of Regulations & Procedures for Fed-eral Radio Frequency Management, Chapter 4. The NTIA manual (known as the Redbook) can be downloaded fromthe website: http:/www.ntia.doc.gov/osmhome/redbook
18、/redbook.html.3There are no official ITU radiolocation bands at HF. So-called HF radars might operate anywhere from just abovethe broadcast band (1.605 MHz) to 40 MHz or higher.4Frequencies from 216450 MHz were sometimes called P-band.5The official ITU designation for the ultra high frequency band e
19、xtends to 3000 MHz. In radar practice, however, theupper limit is usually taken as 1000 MHz, L- and S-bands being used to describe the higher UHF region.6Sometimes included in L-band.7Designated for aeronautical navigation, this band is reserved (with few exceptions) exclusively for airborne radaral
20、timeters.8The frequency range of 24.6524.75 GHz includes satellite radiolocation (earth to space only).9The designation mm is derived from millimeter wave radar, and is also used to refer to V- and W-bands, and part ofKa-band, when general information relating to the region above 30 GHz is to be con
21、veyed.10No ITU allocations are listed for frequencies above 275 GHz.Table 2Comparison of radar-frequency letter band nomenclature with ITU nomenclatureRadar nomenclature ITU nomenclatureRadar letter designationFrequency range Frequency rangeBand No.Adjectival band designationCorresponding metric des
22、ignationHF 330 MHz 330 MHz 7 High frequency (HF) Dekametric wavesVHF 30300 MHz 30300 MHz 8 Very high frequency (VHF)Metric wavesUHF 3001000 MHz0.33 GHz 9 Ultra high frequency (UHF)Decimetric wavesL 12 GHzS 24 GHz330 GHz 10 Super high frequency (SHF)Centimetric wavesC 48 GHzX 812 GHzKu 1218 GHzK 1827 GHzKa 2740 GHz30300 GHz 11 Extremely high frequency (EHF)Millimetric wavesV 4075 GHzW 75110 GHzmm 110 300 GHz
