1、MIL-A-70945 (AR) 30 July 1990 MILITARY SPECIFICATION ANTENNA ASSEMBLY: 12922146 This specification is approved for use within the U.S. Army Armament, Munitions and Chemical Command and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specifi
2、cation establishes the requirements for manufacture and acceptance of the Antenna Assembly, used in the M90 Radar Chronograph (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards and handbooks. The following specifications, standards and handbooks form a part
3、of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). 0 SPECIFICATIONS
4、 MILITARY MIL-F-13926 - Fire Control Materiel, Manufacture and Inspection, General Specification for MIL-P-14232 - Parts, Equipment and Tools for Army Materiel, Packaging of MIL-1-45607 - Inspection Equipment, Acquisition, Maintenance and Disposition of Beneficial comments (recommendations, addition
5、s, deletions) and any pertinent data which may be of use in improving this document, should be addressed to: Commander, U.S. Army ARDEC, ATTN: SMCAR-BAC-S, Picatinny Arsenal, New Jersey 07806-5000 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at t
6、he end of this document or by letter. AMSC N/A FSC 1290 D 1 STRIBUT ION STATEMENT A. Approved for public release; disiribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-707Li5 12 D 777770b OLiSb001 MIL-A-70945 (AR) STANDARDS
7、 MILITARY MIL-STD-105 - MIL-STD-109 - MIL-STD-454 - MIL-STD-2164 - Sampling Procedures and Tables for Inspection by Attributes Quality Assurance Terms and Definitions Standard General Requirements for Electronic Equipment Environmental Stress Screening Process for Electronic Equipment (Unless otherw
8、ise indicated, copies of federal and military specifications, standards and handbooks are available from: Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) The following other Government documents, drawings and publications form a part of this specific
9、ation to the extent specified herein. Unless otherwise specified, the issues shall be those in effect on the date of the solicitation. 2.1.2 Other Government documents, drawinqs and publications DRAWINGS (See 6.4) U.S. ARMY ARMAMENT RESEARCH, DEVELOPMENT AND ENGINEERING CENTER (ARDEC) . 12922098 - B
10、racket Assembly 12922105 - EM1 Test Procedure 12922126 - Microstrip Antenna 12922146 - Antenna Assembly 12922225 - Environmental Test Methods SPECIAL PACKAGING INSTRUCTIONS P12922146 - Special Packaging Instructions for the Antenna Assembly (Copies of drawings, publications, and other Government doc
11、uments required by the contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Order of precedence. In the event of a conflict between Nothing in the text of this specification and the references
12、cited herein, the text of this specification shall take precedence. this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-70
13、945 (AR) 3. FEQUIREMENTS 3.1 General description. The antenna is an input/output device that transmits an RF signal upon command from the M90 Radar Chronograph data unit and receives the doppier signal reflected from the projectile providing signal to the data unit for processing. the applicable dra
14、wings and specifications. 3.2 Materials. The materials shall be in accordance with 3.3 Components and assemblies. The components and assemblies shall comply with all requirements specified on Drawing 12922146, all associated drawings, and with all requirements specified in applicable specifications
15、and standards. Where applicable, the Antenna Assembly shall meet the requirements of MIL-F-13926 and MIL-STD-454 as follows : a. Dimensions and tolerances b. Inorganic protective surface finishings c. Part identification and marking d. Workmanship e. Soldering electrical connections 3.4 Performance.
16、 3.4.1 General performance. 3.4.1.1 Input power. Input power shall be supplied to the Antenna Assembly on pins A and B of the connector J1. The Antenna Assembly shall withstand the following limits: a. Minimum voltage: 24 VDC. c. Consumption: 18 Watt maximum. b. Maximum voltage: 55 VDC. 3.4.1.2 ON/O
17、FF control. The ON/OFF control command to the Antenna Assembly shall be supplied on pins D and E of input connectorJ1. input, with 680 ohm series resistors on command and return lines. The command shall be a discrete 12 VDC +/-0.6 V a . riONir command: Antenna transmit and receive. b. riOFFri comman
18、d: Antenna shutdown. 3.4.1.3 Doppler output sisnal. Two, AC coupled, 180 degrees relative phase difference, Doppler signal outputs shall be provided. The outputs shall appear on pin D (DOPPLER +) and pin E (DOPPLER -). The signal shall satisfy the following conditions on both outputs: 3 Provided by
19、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-707Ll5 12 7777706 0450602 3 W DOPPLER(-), ON/OFF RETURN MIL-A-70945 (AR) a. Noise: 2 VPTP maximum. b. Saturated Output Swing: 14 VPTP minimum, 18 VPTP c. Bandwidth: 7 KHz to 1OQ KHz. maximum. .O1 5UF .O1 5UF
20、E 3.4.1.4 Common line interface. The ON/OFF control input signal and the DOPPLER signal output (t and -) shall be common lines. Figure 1 shall be used as a reference for fabrication of the common lines interface. I I I ANTENNA UNIT .: 680 : 1 /8W DATA UNIT I I 1 /8W FIGURE 1 - COMMON LINES INTERFACE
21、 3.4.2 Microwave radiatinq pattern performance. The Antenna Assembly shall satisfy the following requirements for microwave radiating pattern, using a microstrip antenna in accordance with Drawing 12922126. a. Gain: 22 DB minimum. b. -3 DB beamwidth, E-Plane-horizontal: 15 t/- 2 c. -3 DB beamwidth,
22、H-Plane-vertical: 7 t/- 2 degrees. d. Side lobe level: -12 DB maximum below main lobe. e. Squint angle, E-Plane: O t/-1 degrees. f. Squint angle, H-Plane: 7 t/-1 degrees. g. Cross polarization: -24 DE maximum. degrees, 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without li
23、cense from IHS-,-,-MIL-A-70945 (AR) 3.4.3 Receiveltransmit. The Antenna Assembly shall satisfy the following Receiving/Transmitting requirements: Frequency shall be factory tuned to 10525 +/- 1 MHz at 77 +/- 14 degree F Ambient. Frequency drift vs Time: +/- 5MHz maximum per 6 month period. Frequency
24、 drift vs Temp: -50 degree F to 125 degree F: +/- 7 MHz maximum. under all environmental conditions, at the microstrip antenna connector. a. Frequency: b. Output power: 20.8 DBM minimum to 23.8 DBM maximum c. Receiver sensitivity: -106 DBM minimum. d. Receiver bandwidth: 7 KHz to 100 KHz. 3.4.4 nput
25、/output interconnections. nput/output connections to the Antenna Assembly shall be with a 5 pin connector type MS3124E-14-5PY. Pin assignment shall be in accordance with TABLE I. TABLE I. Wirins connections 3.5 Environmental requirements. 3.5.1 Hish temperature. The Antenna Assembly shall meet the r
26、equirements of 3.3 and 3.4 when thermally stabilized at +125 degrees F. The Antenna Assembly when subjected to storage temperature of +150 degrees F shall meet the requirements of 3.3 and 3.4 when returned and thermally stabilized at ambient temperature. 3.5.2 Low temperature. The Antenna Assembly s
27、hall meet the requirements of 3.3 and 3.4 when stabilized at -50 degrees F and when returned and thermally stabilized at ambient temperature. 3.5.3 Solar Radiation. The Antenna Assembly shall meet the requirements of 3.3 and 3.4 after being subjected to 355 BTU per square foot. 3.5.4 Humidity. The A
28、ntenna Assembly shall meet the requirements of 3.3 and 3.4 after being subject to 240 hours at a 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-70745 12 m 7977906 0450604 7 m MIL-A-70945 (AR) relative humidity of 94 +/-5 percent from +68 deg
29、rees F to +125 degrees F. 3.5.5 Shock. The Antenna Assembly when mounted on Bracket P/N 12922098, shall meet the requirements of 3.3 and 3.4 after being subjected to a shock of 50 Gs for 11 milliseconds duration in each of its mutually perpendicular axis for a total of 18 shocks. 3.5.6 Vibration. Th
30、e Antenna Assembly when mounted on Bracket P/N 12922098 shall meet the requirements of 3.3 and 3.4 after being subjected to vibration, having a double amplitude of 1.0 inch, from 5 to 6.5 HZ and acceleration level of 2 Gs over the 6.5 to 200 HZ frequency range for a 15-minute duration in each of its
31、 three mutually perpendicular axes. 3.5.7 Altitude. The Antenna Assembly shall meet the requirements of 3.3 and 3.4 after being subjected to and altitude of 10,000 feet in operational mode and after exposure at an altitude of 50,000 feet in nonoperational mode. requirements of 3.3 and 3.4 after bein
32、g subjected to a 2.0 inch per hour, 20 mile per hour wind driven rain. 3.5.8 Rain. The Antenna Assembly shall meet the 3.5.9 Salt foq. The Antenna Assembly shall meet the requirements of 3.3 and 3.4 after being subjected to 48 hours of continuous exposure to a 5 percent salt solution with a specific
33、 gravity of 1.027 to 1.034, a PH of 6.5 to 7.0 and a temperature of 95 degrees F. 3.5.10 Sand and dust. The Antenna Assembly shall meet the requirements of 3.3 and 3.4 after being subjected to 36 hours of exposure to wind driven sand and dust. 3.5.11 Funsus. The Antenna Assembly shall meet the requi
34、rements of 3.3 and 3.4 after being subjected to 28-day fungus exposure to a composite spore suspension. drawing 12922105 when connected to an M90 RADAR CHRONOGRAPH (NSN: 1290-01-073-0764), supplied as Government-furnished material. 3.5.12 w. The Antenna Unit shall meet the requirement of 3.6 Environ
35、mental stress screeninq (ESS). The Antenna Assembly shall be subjected to a 40-hour run-in period (excluding downtime) which includes vibration and operation at temperature extremes. The time required to conduct the vibration test shall not be included as part of-the-run-in period. The Antenna 6 Pro
36、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-70945 (AR) Assembly shall meet the requirements of this specification for the 40-hour run-in period.- Antenna Assembly shall meet the performance requirements in 3.3 - 3.6.1 Environmental stress scre
37、eninq (ESS) temperature. The and 3.4 after being subjected to-40-hours of temperature cycling between O degrees F and +125 degrees F in accordance with 5.1.2.1 Of MIL-STD-2164. 3.6.2 Environmental stress screeninq (ESS) vibration. The Antenna Assembly shall meet the performance requirements in 3.3 a
38、nd 3.4 after being subjected to random motion in the range of 20 to 2000 Hz for 5 minutes at an axis perpendicular to the largest surfaces of the Antenna Assembly. Acceleration spectral density is 6.06 g. RMS in accordance with 5.1.1 of MIL-STD-2164. 3.7 Fabrication. The Antenna shall be manufacture
39、d in 3.8 First article inspection. When specified in the contract or purchase order, three samples shall be subjected to first article inspection in accordance with the technical provisions herein (see 4.3) . accordance with Drawing 12922146. 3.9 Workmanship. The workmanship requirements of MIL-F-13
40、926 and MIL-STD-454 shall apply. 4. QUALITY ASSURANCE 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. Except as otherwise specified in the
41、 contract or purchase order, the contractor may use his own or any other- facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification
42、where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Reference shall be made to MIL-STD-109 to define quality assurance terms used herein. 4.1.1 Responsibility for compliance. All items must meet all requirements of sections 3 and 5 and all
43、applicable drawings. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of assuring that all product
44、s or supplies submitted to the Government for acceptance comply with all 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-70745 12 777770b 0450bOb O MIL-A-70945 (AR) requirements of the contract. does not authorize submission of known defectiv
45、e material, either , indicated or actual, nor does mit the Government to acceptance of defective material. Sampling in quality conformance e 4.1.2 General provisions. The component and subassembly inspection requirements of MIL-F-13926 and MIL-STD-454 form a part of the Quality Assurance Provisions
46、of this specification. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.3). b. Quality conformance inspection (see 4.4). c. Special sampling (see 4.5) . 4.2.1 Inspection conditions. Unless otherwise specifie
47、d, all examinations and tests shall be conducted at the following standard ambient conditions: a. Temperature +60 degrees to t90 degrees F. b. Relative humidity 90% RH maximum. c. Pressure 28 to 32 inches of Hg. 4.3 First article inspection. 4.3.1 First article submission. The contractor shall submi
48、t e a first article sample as designated by the contracting officer consisting of three Antenna Assemblies for inspection in accordance with 4.3.2. 4.3.2 Inspections to be performed. First article assemblies, compnents and test specimens may be subjected by the Government to any or all of the examin
49、ations and tests specified in TABLE II and TABLE III herein, and to any or all requirements of the applicable drawings. 4.3.3 Rejection. If any assembly, component or test specimen fails to comply with any of the applicable requirements, the first article sample shall be rejected. The Government reserves the right to terminate its inspection upon any failure of any Antenna Assembly to comply with any of the stated requirements. 4.4 Q
