1、NIL-A-2882b 57 7777906 0053327 8 I MIL-A-28826( EC) 3 May 1976 MILITARY SPECIFICATION ANTENNA SYSTEM, BROADBAND IDENTIFICATION, FRIEND OR FOE This specification is approved for use by the Naval Electronic Systems Comnand, Department of the Navy, and is available for use by all Departments and Agenci
2、es of the Department of Defense. 1. SCOPE 1.1 Sco e. This specification covers the performance requirements of a broadband identifica- tion frien se or foe (IFF) antenna system. The antenna system operates in two bands: high frequency (1030 MHz i 10 MHz and 1090 MHz f 10 MHz), and low frequency (600
3、 MHz to 800 MHz). The high fre- quency band operates with sum and difference radiated patterns in an ISCS mde at 1030 MHz f 10 MHz, The low frequency band and the 1090 MHz i 10 MHz operate in the sum pattern only. 2. APPLICABLE DOCUMENTS 2.1 SPECIFICATIONS Issues of documents. The following document
4、s of the issue in effect on date of invitation for bids or request for proposal form a part of this specification to the extent specified herein: MIL I TARY MIL-C-17/74 MIL-E-16400 MIL-E-17555 STANDARDS MILITARY MIL-STD-105 MIL-STD-1 O9 MIL-STD-454 MIL-STD-810 MIL-STD-1631 HANDBOOKS MILITARY MIL-HDB
5、K-216 Cable, Radio Frequency, Coaxial, RG-213/U El ec troni c, Interior Comnuni Ca t ion And Navigation Equipment, Naval Ship And Shore: For Electronic And Electrical Equipment, Accessories, And Repair Parts, Packaging And Packing Of General Specification Sampling Procedures And Tables For Inspectio
6、n By Attributes Quality Assurance Terms And Definitions Standard General Requirements For Electronic Equipment Environmental Test Methods Procedures For Selection Of Electronic And Electrical Parts During Equipment Design RF Transmission Lines And Fittings (Copies of specifications, standards, handb
7、ooks, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring actfvlty or as directed by the contracting officer.) FSC 5985 THIS DOCUMENT CONTAINS PAGES E I Provided by IHSNot for ResaleNo reproduction or networking p
8、ermitted without license from IHS-,-,-_ MIL-A-28826 57 9777706 0053328 T MIL-A-28826( EC) 3. REQUIREMENTS 3.1 General. The antenna system shall conform to the requirements of MIL-E-16400 to the extent specified herein. 3.1.1 Applicable requirements of MIL-E-16400. The antenna system shall conform to
9、 the following requirements of MIL-E-16400: a. b. d. e. f. 9 .- h. i. J. k. 1. m. n. C. Salt fog Wind velocity Icing Thermal design Nuclear air blast (7 psi) Shock (high-impact) Vi brat ion Parts, materials, and processes Electrical design and construction Maintenance design Mechanical design and co
10、nstruction (excep Identification and marking System safety Workmanship time )tal izing meters are not requ . :ed) The requirements of a through n shall apply to above-deck equipments, and f through n shall apply to below-deck equi pments. principles in the design of the equipment shall be in accorda
11、nce with Requirement 62 of MIL-STO-454. 3.1.2 Human engineering. Guidelines in applying human engineering design criteria and 3.1.3 First article sample. Prior to beginning production, a sample shall be tested as specified in 4.3. 3.2 Parts and materials. . 3.2.1 Selection of parts and materials. Pa
12、rts and materials shall be selected and applied in accordance w3 th MIL-E- arts shall be derated in usage to provide a minimum safety factor of 100 percent for the cri%ai parameters when practical. Component parts shall be rated at 125OC minimum, or higher if required by Thermal Evaluation of circui
13、t application. Plastic encapsulated micro-circuits shall not be used. Non-standard parts. met by using standard parts or materials specified in MIL-E-16400, the use of non-standard parts shall be in accordance with the Approval Of Non-Standard Parts paragraph of MIL-E-16400, 3.2.1.1 When it has been
14、 determined that design requirements cannot be 3.2.1.1.1 Prescreening of non-standard parts. Prescreening of non-standard parts shall be in accordance with MIL-STD-1631. 3.3 Maintainability. The antenna system shall have a mean-corrective-maintenance-time ( that is, 1030 MHz, 1090 MHz, and 600 to 80
15、0 MHz. 3.9.3.5 Backlobes. The backlobe level in both the horizontal and vertical planes shall be -25 dB except at 1030 MHz and 1090 MHz. At 1030 MHz and 1090 MHz the backlobe shall be at least -15 dB. 3.9.3.6 VSWR. The antenna system shall have a VSWRof less than 1.4:l from 600 MHz to 800 MHz and at
16、m0 f 10 MHz and 1090 f 10 MHz. 3.9.4 Connectors and cables. RF Type N connectors shall be used and shall be selected from MIL-HDBK-216. Cables shall be in accordance with MIL-C-17/74. All necessary mating connectors shall be provided as part of the equipment. 3 Provided by IHSNot for ResaleNo reprod
17、uction or networking permitted without license from IHS-,-,-MIL-A-28826 57 7777706 0053330 8 E MIL-A-28826( EC) 1 3.9.5 Antenna mechanical design. 3.9.5.1 Weights and dimensions. The broadband antenna system shall not exceed a maximum weight of 65.77 kilograms (145 pounds). 711.2 m(28 inches) high,
18、and 914.4 mm (36 inches) deep. The maximum dimensions shall be 3175.Omm (125 inches) long, 3.9.5.2 Antenna structure assembly and mounting box assembly. The antenna structure assembly and the mounting box assembly shall be an integral part of the antenna. The mounting box assembly shall be basically
19、 a one-piece construction, symnetrical about the antenna centerline and extending to the center of each moment arm of the antenna. shall be possible to feed the antenna directly by coaxial cables through approved RF connectors. The electrical characteristics of the antenna and feed system shall not
20、be adversely affected when the antenna is fed in this manner. The design of the antenna shall be such that it 3.9.5.3 Structure assembly. The structure assembly shall be a one-piece construction with provisions for adequately supporting the radiating elements, feeder circuits, signal processor assem
21、bly, and backfill radiator assembly. 3.9.5.4 Mounting provisions. The RF coup1 ing and mechanical mounting provisions for mounting the antenna on the pedestal shall be such that the antenna can, without modification, be mounted on the pedestal for the AN/UPA-22 antenna system, as shown in FIGURE 6.
22、be as shown in FIGURE 6. The design of the antenna shall be such that it will be possible to mount the antenna on a radar antenna structure when proper mounting fixtures are provided. Mounting provisions shall I Two sets of mounting holes, spaced as shown in FIGURE 6 shall be provided. 3.9.6 Broadba
23、nd IFF antenna system components. The broadband IFF antenna components shall consist of the following component parts as a design minimum. feasible, the design philosophy shall be incorporated. Where component integration is 3.9.6.1 Radiating elements. 600 MHz to 1100 MHz. the system primary require
24、ment specified herein. requirement. processor unit to the 12 log periodic (LP) antenna elements, shall be provided. The radiating element used shall be a broadband design covering The radiating element patterns, gain, VSWR shall be consistent with achieving I A yagi array is acceptable for meeting t
25、his 3.9.6.2 Feeder circuits. Two feeder circuits, capable of coupling RF energy from the signal 3.9.6.2.1 Electrical. The two feeder circuits to be supplied shall be capable of providing The feeder circuits a CHEBYSHEV distribution of the signal amplitudes to the radiating elements. shall have provi
26、sions for adjusting the phases of each individual antenna element and the input to each feeder circuit; strip line techniques such that both assemblies can be readily assembled into or disassembled from the system for repair or replacement. antenna assembly and shall contain the following components
27、: 3.9.6.2.2 Mechanical. The two feeder circuits shall be modular in construction, utilizing 3.9.6.3 Signal processor assembh. The signal processor assembly shall be located on the L a. ANDPA-61 (Government Furnished Equipment) c. Hybrid d. Directional Coupler Mechanical. b. Diplexer L 3.9.6.3.1 The
28、signal processor shall be designed so that any component can be removed without disturbing or removing any other component in the assembly. assembly shall be equipped with handle(s) for removing the complete assembly from the broadband antenna. (Type N), three RF output connectors (Type N), and one
29、video input connector (BMC) for the switch driver pulse. package can be operational with or without the AN/UPA-61 RF switch. shall be provided as part of the equipment. The signal processor 3.9.6.3.2 Electrical. The signal processor assembly shall have one RF input connector Interconnecting cable de
30、sign shall be such that the signal processor component All necessary mating connectors 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-28826 57 111 7777706 005313L T MIL-A-28826( EC) 3.9.6.4 Diplexers. The diplexers shall be designed for hard
31、 mounting on the IFF antenna for above-decks shipboard environment. The following are the requirements for the diplexers: a. b. C. d. e. f. 9. h. i. j. Frequency range: Low band: 600-800 MHz Insertion loss: Low and high pass bands: 0.5 dB maximum Power handl ing: VSWR: il .5:1 High pass filters shal
32、l have DC continuity to permit passage of a DC pulse (-50V amplitude) to an RF switch. Environmental conditions: Weight: Size: See FIGURE 2 for Type I High band: 1000-1100 MHz Low and high reject bands: 40 dB High and low band: 5.0 KW peak 25 watts average Shall conform to the requirements of 3.1 3.
33、1752 kilograms (seven pounds) maximum - See FIGURE 3 for Type II The Type I and Type II diplexers shall be in accordance with FIGURE 2 and FIGURE 3 respectively. . Connectors: Type N. 3.9.6.5 Hybrid. The following are the requirements for the 180 degree hybrid assembly: a. b. C. d. e. f. 9. h. i. 3.
34、9.6.6 a. b. C. d. e. f. 9. Frequency range: Power handl i ng : Isolation: Amp1 itude balance: VSWR : Phase: Connectors: Size: Weight: Directional coupler. Frequency range: VSWR: Power handl ing : Directivity: Coup1 ing: Weight: Size: 600 to 1150 MHz 25 watts average 20 dB minimum 30 dB design object
35、ive 10.5 dB maximum 51.5 maximum 180 f 9.0 degrees Type N 5 KW peak See FIGURE 4 0.4536 kilograms (one pound) maximum The following are the requirements for the directional coupler: 600 to 1100 MHz 1.25:l maximum 25 watts average 20 dB minimum Value necessary to achieve 1 SLS system performance 0.68
36、040 kilograms (1.5 pounds) maximum See FIGURE 5 5 KW peak 3.9.6.7 Backfill radiator assembly. A backfill radiator assembly shall be provided on the LP antenna to provide coverage of the backlobe. radome and sealed against shipboard environment. with the directional antenna pattern shall provide cove
37、rage of the sum pattern sidelobes. be designed to provide at least four dB coverage of all sum pattern sidelobes and backlobes. backfill radiator shall be designed to operate at 1030 MHz 1 10 MHz only. The backfill radiator shall be housed in its own It shall The The backfill radiator pattern in con
38、junction 4. QUALITY ASSUYNCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. or any other facilities suitable for the performance of the i
39、nspection requirements specified herein, unless disapproved by the Government. the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise specified in the contract or order, the co
40、ntractor may utilize his own The Government reserves the right to perform any of I 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-VIL-A-2BB26 57 W 7777706 0053332 I MIL-A-28826( EC) 4.1.1 Government verification. All quality assurance operations p
41、erformed by the contractor will be subject to government verification at any time. Verification will consist of, but is not limited to, a) Surveillance of the operations to determine that practices, methods, and procedures of the written quality program are being properly applied; b) Government prod
42、uct inspection to measure quality of the product to be offered for acceptance; c) Government inspection of delivered products to assure compliance with all inspection requirements of this specification. Failure of the contractor to promptly correct deficiencies discovered by him or of which he is no
43、tified shall be cause for suspension of acceptance until corrective action has been taken or until conformance of the product to prescribed criteria has been demonstrated. 4,1.2 Quality assurance terms and definitions. Quality assurance terms used in this specification shall be as defined in MIL-STD
44、-109. 4.2 Classification of inspections. The methods of inspection are classlfied as follows: a. First article inspection (4.3) b. Qual i ty conformance inspections (4.4) 1. Production inspection (Group A) 2. Production control inspection (Group B) 3. Environmental inspection (Group C) Inspection of
45、 preparation, for delivery (4.6) c. 4.3 First article inspection. Unless otherwise specified (see 6.2). one unit shall be required for first article inspection. First article inspection shall consist of all examination and testing necessary to determine compliance with the requirements of this speci
46、fication. First article inspection shall include the tests specified in TABLE 1. TABLE I. First art1 Exami nation or test Surface examination Weight Size Parts and Material Finish , Marking Safety Workmansh i p Performance Temperature Low temperature High temperature Humidity Wind velocity Icing Int
47、erchangeability Nuclear Air Blast Shock Vi bra tion Magnetic field environment Magnetic Thermal performance test equirement paragraph 3.9.5.1, 3.9.6.49, 3.9.6.51, 3.9.6.6f 3.9.5.1, 3.9.6.4h, 3.9.6.5h, 3.9.6.69 3.1.1, 3.2 3.1.1 3.1.1 3.1.1 3.1.1 3.9 3.4 3.4 3.4 3.5 3.1.lb 3.1 .IC 3.1 .lh 3.1 .le 3.1
48、.If 3.1 .lg 3.8 le and qua Test paragraph 4.5.1 4.5.1 4.5.1 4.5.1 4.5.1 4.5.1 4.5.1 4.5.2 4.5.3 4.5.3.1 4.5.3.2 4.4.3 4.5.5 4.5.6 4.5.9 4.5.8 4.4.3 4.4.3 4.5 4.5 4.5.10 ,ty con First irticle X X X X X X X X X X X X X X X X X X X X X rmance inspections. 3ualitv conformance inspection Group A Group B
49、Group C 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-28826 57 O 7779706 0053333 3 O MIL-A-28826( EC) 4.4 Quality conformance Inspections. 4.4.1 Production Inspection (Group AI. Production inspection shall be made on every equipment 01 inspection shall comprise such examinations and tests as will prove the workmanship and reveal omissions and errors of the roduction process, such as which detect deviations from d
