NAVY MIL-A-28893-1985 ANTENNA COUPLER GROUP AN SRA-56 AN SRA-57 AN SRA-58《AN SRA-56 AN SRA-57 AN SRA-58天线耦合器组》.pdf

1、MIL-A-2B73 57 = 7797706 0053733 7 MIL-A-28893(EC) 2 June 1985 This specification of the Navy, and is ava 1. SCOPE MILITARY SPECIFICATION . ANTENNA COUPLER GROUP, AN/SRA-56, AN/SRA-57, AND AN/SRA-58 is approved for use lable for use by al by the Space and Navl Warfare Systems Comnand, Department Depa

2、rtments and Agencies of the Department of Defense. 1.1 SCO e. This specification.covers the design, performance, and testing of a 1 kilowatt (kW) (aver Shipboard Machinery, Equipment And Systems, Requirements For Electronic, Interior Comnunication And Navigation Equipment, Naval Ship And Shore: Gene

3、ral Specification For Wire, Electrical , Insulated, General Specification For Electronic And Electrical Equipment , Accessories, And Repair Parts; Packaging And Packing Of Fuseholder, Extractor Post Type, Blown Fuse Indicating And Nonindicating, General Specification For Electronics Type Designation

4、s, Identification Plates And Markings; Requirements For Cabinets, Electronic Equipment, CY-4516(A)/S And CY-4516(B)/S (Single Bay) (Naval Shipboard Use) Connectors, Coaxial , Radio Frequency,. General Specification For Connectors, Plug, Electrical , Coaxial, Radio Frequency, (Series C (Cabled), Male

5、, Class 2) Connectors, Plug, Electrical , Coaxial Radio Frequency, (Series Cy (Cabled), Female, Class 2) Connectors, Receptacle, Electrical , Coaxial , Radio Frequency, (Series Cy (Cabled), Female, Flange Mounted, Rear Mounted, Class 2) Connectors, Coaxial Radio Frequency Series C (Cabled- Receptacl

6、e, Female, Jam Nut, Front Mounted, C1 ass 2) Connectors, Plug, Electrical, Coaxial, Radio Frequency, (Series Cy (Cabled), Male, Right Angle, Class 2) Connectors, Receptacle, Electrical, Coaxial, Radio Frequency, (Series Cy (Cabled), Female, Jam Nut, Rear Mounted, Pressurized, Class 2) Connectors, Co

7、axial , Radio Frequency, Series C (Uncabled- Receptacle, Female, Flange Mounted, Rear Mounted, Class 2) THIS DOCUMENT CONTAINS 17 PAGES Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander,

8、 Space and Naval Warfare Systems Comnand (SPAWAR-8111) , Washington, DC 20363-5100, by using the self-addressed Standard- ization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. d 7 FSC 5985 Provided by IHSNot for ResaleNo reproduction or networking

9、permitted without license from IHS-,-,-_ flIL-A-dd93 59 9999906 0053932 O M MIL-A-28893( EC) MI L-C- 39012/13 MIL-C-39012/14 MI L-C-39012/15 STAN DARDS MI LI TARY MIL-STD-105 MIL-STD-109 MIL-STD-454 MI L-STD-461 MIL-STD-462 MIL-STD-471 MIL-STD-781 MIL-STD-965 DoD-STD-1399, Section 300 HAND8 OOKS MIL

10、ITARY MIL-HDBK-235 MIL-HDBK-237 MIL -HDBK-241 Connectors, Coaxial , Radio Frequency, Series C (Uncabled- Receptacle, Female, Jam Nut Mounted, Front Mounted, Pressurized, Class 2) Connectors, Coaxial, Radio Frequency, Series C (Uncabled- Receptacle, Female, Jam Nut Mounted, Hermetic Seal, Class 2) Co

11、nnectors, Plug, Electrical, Coaxial, Radio Frequency, (Series C (Cabled), Male, Class 2) Sampling Procedures And Tables For Inspect ion By Attributes Quality Assurance Terms And Definitions Standard General Requirements For Electronic Equipment Electromagnetic Emission And Susceptibility Requirement

12、s For The Control Of Electromagnetic Interference Electromagnetic Interference Characteristics, Measurement Of Maint ai nab i 1 i ty Ver if icat i on/Demonstrat ion/Eval uat i on Reliability Design Qualification And Production Acceptance Tests: Exponential Distribution Parts Control Program Interfac

13、e Standard For Shipboard Systems, Electric Power, Alternating Current (Metric) Electromagnetic Radiated Environment Considerations For Design and Procurement Of Electrical And Electronic Equipment, Subsystems And Systems Electromagnetic Compat ibi 1 ity Management Guide For Platforms, Systems And Eq

14、uipment Design Guide For Electromagnetic Interference (EMI) Reduct ion In Power Supplies (Copies of specif ications, standards, and handbooks required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting

15、 officer.) 2.1.2 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. 3. REQUIREMENTS 3.1 General. The antenna coupler group shall be in accordance with MIL-E-16400, unless otherw

16、ise specified herein. The antenna coupler group shall be designed for transmit operations in the 2 MHz to 30 MHz frequency range. The AN/SRA-56 shall be designed to connect up to four transmitters to one antenna or a maximum of eight transmitters when the associated impedance matching network is use

17、d. The AN/SRA-57 shall be designed to connect up to four transmitters to one antenna or a maximum of eight transmitters when the associated impedance matching network is used. The AN/SRA-58 shall be designed to connect up to four transmitters to one antenna. 3.1.1 First article. When specified, a sa

18、mple shall be subjected to first article inspection (see 4.3 and 6.3). 3.1.2 Operational requirements. Each antenna coupler group shall give re1 iable performance under conditions of intermittent or continuous operation during the exposure to adverse conditions normally encountered in Naval ship com

19、munication service. Mechanical and electrical ruggedness is of paramount importance for assurance of reliable performance without failure. 3.2 Characteristics. Antenna coupler group characteristics shall be as specified in 3.2.1 through 3.2.3.5. 2 Provided by IHSNot for ResaleNo reproduction or netw

20、orking permitted without license from IHS-,-,- MIL-A-273 53 W 9777906 0053733 2 W 2 to 6 I 4 to 12 , 10 to 30 I MIL-A-28893( EC) 3.2.1 Performance characteristics. Performance characteristics shall be as specified in le 3.2.1.1 through 3.2.1.7. I 3.2.1.1 In ut parameters. The antenna coupler groups

21、shall be capable of handling 4 kW (average), 8 khpedance for each multicoupler unit shall be nominally 50 ohms, unbalanced. 3.2.1.2 Operating frequency range. The antenna coupler group shall be capable of operating over the frequency range 2 MHz to 30 MR z. Each antenna coupler group shall include c

22、ouplers . capable of being tuned over the frequency ranges specified in TABLE I. TABLE I. Antenna coupler frequency ranges (MHz). I I I I 1 Frequency I I hiqh limit I Antenna Frequency I Range coup1 er I low limit nom in al AN/SRA-56 AN/SRA-57 AN/SRA-58 1.96 I i:;: 12.30 30.75 3.2.1.3 Passband chara

23、cteristics. Passband characteristics shall be as specified in 3.2.1.3.1 and 3.2.1.3.2. 3.2.1.3.1 Insertion loss. 3.2.1.3.2 Bandwidth. Insertion loss shall be less than 2 decibels (dBj between the input connector and the antenna output connector (four or eight channels) in a 50-ohm system. 12 kiloher

24、tz (kHm 3 dB points. The bandwidth of each coupler unit shall be equal to or greater than 3.2.1.4 Isolation characteristics. Isolation characteristics shall be as specified, in a through c: a. b. The isolation between the input terminals of any two operating channels (four channels or eight channels

25、) shall be at least 35 dB for frequency separation equal to, or greater than, 5 percent throughout the frequency range of the multicoupler. The isolation between the input terminal of any operating channel and the output terminal of the multicoupler (four channels or eight channels) shall be at leas

26、t 35 dB for frequency separations equal to, or greater than, 5 percent of the operating frequency throughout the frequency range of the multicoupler. c. The isolation between the input terminal of any operating channel and the output terminal of the multicoupler (four channels or eight channels) sha

27、ll be at least 60 dB at all frequencies between 2 MHz and 30 MHz that are equal to, or greater than, 25 percent of the operating frequency. 3.2.1.5 Output impedance. Each coupler shall provide an output impedance of 50 ohms, unbalanced. 3.2.1.6 In ut impedance. Each coupler shall provide an input im

28、pedance of 50 ohms, unbalanced. The voltage stan -%- ing wave ratio (VSWR) input for each individual channel shall be less than 1.05:l.O for any 3:l VSWR load. 3.2.1.7 Radio frequency (RF) overload protection. Each coupler unit shall include overload protection and indication to: a. . Limit RF volta

29、ge in the output resonator to 6.25 kilovolts (kV) root-mean-square b. Provide visual local and remote indication of overload protection conditions. The . (rms) and the reflected power in the transmitter to a 3:l ratio at a 1-kW forward power level (250 watts) reflected power. overload protection and

30、 indication circuits shall be actuated automatically when an RF signal is transmitted within f3 percent of the tuned frequency. 3.2.2 Physical characteristics. 3.2.2.1 Dimensions and weight. Physical characteristics of the antenna coupler group shall be as specified in 3.2.2.1. Dimensions and weight

31、 shall be as specified in TABLE II. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-273 57 a 7799706 0053934 4 Items Antenna Coupler Drawer Units, CU-1772lSRA-56, CU-1774lSRA-57, CU- 1776lSRA-58 Antenna Coupler Combiner Units, CU- 1773lSRA-56

32、, CU-1775lSRA-57 Antenna Coupler Group, ANISRA-56, AN/SRA-57, ANISRA-58 Dumy load MIL-A-28893( EC) TABLE II. Dimensions and weight. Width i/ (in.) - 19.0625 32.00 23.00 N/A Depth (in.) 30.125 8.50 38.50 NIA Height (in.) 14.00 15.125 77.00 NIA Maximum nominal weight (lbs) - 2/ 88 30 3/ 735 - 4/ 20 -

33、- i/ Inches. 2/ Pounds 3/ Exclusive of dummy load, packing, crating, maintenance, and installation kits - U/ Exclusive of packing, crating, maintenance, and installation kits 3.2.3 Environmental service conditions. Environmental service conditions of the antenna coupler group shall be as specified i

34、n 3.2.3.1 through 3.2.3.5. 3.2.3.1 Operating temperature range. specified in M-t used in a sheltered controlled environment (Range 4). 3.2.3.2 Nonoperating temperature. specified in MIL-E-16400 for the equipment used in a sheltered controlled environment (Range 4). 3.2.3.3 Shock. The antenna coupler

35、 shall be capable of withstanding the shock requirements of MIL-S-901 for Grade A, Class III, medium weight, Type A for shipboard equipment. 3.2.3.4 Vibration. MIL-STD-167-1 at an upper vibration frequency limit of 50 hertz (Hz). shall be selected randomly, not in incremental steps. equipment of Mdo

36、. The antenna shall have the operating temperature range The antenna shall have the nonoperating temperature range The antenna coupler group shall withstand the Type I vibration test of Vibration test frequencies 3.2.3.5 Salt fo . 3.3 Parts and materials. Parts and materials shall be as specified in

37、 3.3.1 through 3.3.2. 3.3.1 Parts. Parts shall be as specified in 3.3.1.1 through 3.3.1.4. 3.3.1.1 Parts controls. The parts to be incorporated in the equipment shall be controlled in accordance with MIL-STD-965 , Procedure I. 3.3.1.2 Tuning capacitors. conform to MIL-STD-454 , Requirement 2. freque

38、ncy tuning characteristics. capacitor. antenna inputs and receiver antenna output shall be Series C in accordance with MIL-C-39012 and MIL-C-39012/6 through MIL-C-39012115. cabinet and shall be suitably labeled. The center pin of the Series C connectors shall be made captive in all directions. to en

39、sure proper mating. used. The antenna coupler group shall withstand the salt fog test for sheltered All tuning capacitors shall have an air dielectric and shall Tuning capacitors shall have midline or straight line Alignment provisions shall be incorporated for each tuning 3.3.1.3 RF input and outpu

40、t (I/O) connectors. The coaxial RF connectors for the receiving The receptacles shall be mounted at the top of the equipment RF inserts, if used, shall be constrained from nonperpendicular movement Connectors shall be of the solder-lug type; crimped pin types shall not be 4 I . Provided by IHSNot fo

41、r ResaleNo reproduction or networking permitted without license from IHS-,-,-a MIL-A-273 57 7777706 0053735 b MIL-A-28893( EC) 3.3.1.4 Multiconductor connectors. Mating plugs for multiconductor cable connectors shall be provided with cable clamps. All external mounted connector receptacles shall be

42、provided with a suitable protective plastic cap to prevent damage to the connector when the mating connector is not installed. Separate internal and external connectors shall be used for the application specified in a through c: a. Primary alternating current line voltage b. Receiver audio input c.

43、Remote overload indicator 3.3.2 Materials. No ferrous material or nonlinear part shall be used in the main RF signal . Nonlinear parts shall not be connected to the input resonator for use with overload detection path. or protection. 3.4 Electrical design and construction. Electrical design and cons

44、truction of the antenna coupler group shall be as specified in 3.4.1 through 3.4.2. 3.4.1 Electrical power characteristics. The antenna coupler group shall conform to the interface requirements of DoD-STD-1399, Section 300. alternating current (VAC), 60 Hz, single-phase, Type I. 3.4.1.1 Steady-state

45、 voltage and frequency. The antenna coupler group shall conform to the maximum dissipation requirements of MIL-t-16400 under the conditions specified in a through f: Nominal supply voltage shall be 115 volts a. Nominal voltage: 115 VAC b. Lower voltage limit: 103.5 VAC c. Upper voltage limit: 126.5

46、VAC d., Nominal frequency: 60 Hz e. Lower frequency limit: 57 Hz f. Upper frequency 1 imit: 63 Hz 3.4.2 3.5 Mechanical design and construction. Mechanical design and construction shall be as specified 3.5.1 Rounded corners and edges. Internal wiring and cab1 ing. Al 1 wiring shall be polytetrafluoro

47、ethylene insulated. Hookup wire shall conform to MIL-W-16 878, Type E. in 3.5.1 through 3.5.5. Sharp edges and points of any kind shall be avoided. All edges and corners of the enclosure shall be rounded, 3.5.2 Equipment mounting. The antenna coupler group shall be deck-mounted in accordance with MI

48、L-E-16400. Resilient mounts shall not be used. 3.5.3 Composition. The antenna coupler group shall consist of four individual coupler units, a power supply unit, and an impedance matching network, shall be slide-mounted in a cabinet. The slides shall be equipped with automatically operated locks whic

49、h lock units in both servicing and operating positions. TABLE III. The coupler units and power supply unit Design similarities are specified in TABLE III. Basic similarities in antenna coupler groups. Items Antenna coupler units Power supply Equipment cabinet Impedance matching Frequency range (MHz) network Antenna coupler groups AN/SRA-56 CU-1772/SRA-56 , PP-4993/SRA CY -6422/SRA-56 CU- 1773/SRA- 56 1.95 to 6.15 2 to 6 (nominal) 5 AN/SRA-57 CU- 1774/SRA-57 CY- 1775/SRA- 57 3.90 to 12.30 4 to