1、 MIL-DTL-25707F 16 April 2008 SUPERSEDING MIL-DTL-25707E 23 July 1999 DETAIL SPECIFICATION ANTENNA, FLUSH MOUNT, L-BAND, GENERAL SPECIFICATION FOR This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This document covers the gener
2、al requirements for flush mounted L-band antennas within the frequency range of 960 to 1,220 MHz. 1.2 Classification. Antennas covered by this document are classified by style, as specified (see 3.1). 1.3 Part or Identifying Number (PIN). The PIN consists of the letter M, the basic number of the spe
3、cification sheet, and an assigned dash number (see 3.1) as shown in the following: M25707/1 -01 Military designator_ _Dash number Specification sheet number _ 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This se
4、ction does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cit
5、ed in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, i
6、ssues of these documents are those cited in the solicitation or contract (see 6.2). DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-3643 - Connectors, Coaxial, Radio Frequency, Series HN, and Associated Fittings, General Specification for. MIL-PRF-5606 - Hydraulic Fluid, Petroleum Base; Aircraft, Missi
7、le, and Ordnance. MIL-DTL-5624 - Turbine Fuel, Aviation, Grades JP-4, JP-5, and JP-5/JP-8ST. MIL-PRF-39012 - Connectors, Coaxial, Radio Frequency: General Specification for. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-810 - Test Methods Standard for Environmental and Engineering Considerations and Labor
8、atory Tests. MIL-STD-1285 - Marking of Electrical and Electronic Parts. AMSC N/A FSC 5985 INCH-POUND Comments, suggestions, or questions on this document should be addressed to: Commander, Defense Supply Center Columbus, ATTN: DSCC-VAT, P.O. Box 3990, Columbus, OH 43218-3990, or e-mailed to TubesAmp
9、sdla.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25707F 2 (Unless o
10、therwise indicated, copies of the above specifications and standards are available from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094 or online from http:/assist.daps.dla.mil.) 2.2 Non-Government publications. The following publications form a
11、part of this document to the extent specified herein. Unless otherwise specified, the issues of documents which are DoD adopted are those cited in the solicitation or contract (see 6.2). INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE) IEEE Std 149-1979 - Test Procedures for Antennas. (IEEE
12、standards are available online at http:/www.ieee.org or from IEEE Service Center, 445 Hoes Lane, P.O. Box 1331, Piscataway, NJ 08855-1331.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein (except for related associated specificati
13、ons or specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified here
14、in and in accordance with the applicable specification sheets. In the event of any conflict between requirements of this specification and the specification sheet, the latter shall govern. 3.2 First article. This specification makes provisions for first article testing. Antennas furnished under this
15、 specification shall be a product which has been tested in accordance with the first article tests prescribed herein (see 4.3) and approved by the responsible acquiring activity (see 6.4). 3.3 Materials and finish. Materials shall be as specified herein (see 3.1). Where a definite material is not sp
16、ecified, materials and finish used on construction of the antenna shall resist erosion of surfaces due to action of rain, ice crystals, and other impinging particles at velocities as specified in accordance with applicable specification sheet (see 3.1). Acceptance or approval of any constituent mate
17、rial shall not be construed as a guaranty of acceptance of the finished product. 3.3.1 Nonflammable material. Materials shall be nonflammable when tested by accepted industry methods. 3.3.2 Fungus inert material. The antenna materials shall be fungus inert or resistant. 3.3.3 Pure tin. The use of pu
18、re tin as an underplate or final finish is prohibited both internally and externally. Tin content of the amplifier components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.7). 3.4 Design and construction. Antenna shall be of de
19、sign and physical dimensions specified (see 3.1). 3.4.1 Connectors. The antenna connectors shall be designed to accommodate plug UG-59( )/U and meet the interface requirements in accordance with MIL-DTL-3643. The test probe connector shall be designed to accommodate plug P/N M39012/16-0001 in accord
20、ance with MIL-PRF-39012. 3.4.2 Temperature operating range. The antenna shall operate without electrical or mechanical deterioration over the specified temperature range in accordance with the application specification sheet (see 3.1). 3.4.3 Seal (see 4.6). All openings of the antenna cavity shall b
21、e sealed to prevent air leakage during all changes in surface pressure encountered in air operations between pressure altitudes of 0 to 70,000 feet. 3.4.4 Resistance to solvents (see 4.7). All materials used in construction shall withstand direct contact with aromatic fuels and hydraulic liquid with
22、out causing electrical or mechanical deterioration. 3.5 Environmental requirements. The antenna shall withstand the environmental tests of 4.5.7 without mechanical or electrical deterioration. Following each environmental test, the antennas shall meet the electrical requirements specified. 3.5.1 Hig
23、h temperature. When tested as specified in 4.5.7.7, the antenna shall meet the electrical requirements of 3.6.2, 3.6.3 and 3.6.4. 3.5.2 Temperature altitude. When tested as specified in 4.5.7.1, the antenna shall meet the electrical requirements of 3.6.2 through 3.6.4. 3.5.3 Shock. When tested as sp
24、ecified in 4.5.7.2, the antenna shall meet the electrical requirements of 3.6.2 through 3.6.4. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25707F 3 3.5.4 Vibration. When tested as specified in 4.5.7.3, the antenna shall meet the electrica
25、l requirements of 3.6.2 through 3.6.4. 3.5.5 Humidity. When tested as specified in 4.5.7.4, the antenna shall meet the electrical requirements of 3.6.2 through 3.6.4. 3.5.6 Fungus. When tested as specified in 4.5.7.5, the antenna shall meet the electrical requirements of 3.6.2 through 3.6.4. 3.5.7 S
26、alt fog. When tested as specified in 4.5.7.6, the antenna shall meet the electrical requirements of 3.6.2 through 3.6.4. 3.6 Electrical requirements. 3.6.1 Frequency. The antenna shall provide performance over a specified radio frequency band in accordance with the applicable specification sheet (se
27、e 3.1). 3.6.2 Voltage standing wave ratio (VSWR). When antennas are tested as specified in 4.5.2, the VSWR (as referenced to a 50 system) at the antenna input shall be no greater than specified in the applicable specification sheet (see 3.1). 3.6.3 Sampling probe VSWR. When antennas are tested as sp
28、ecified in 4.5.3, the VSWR of the sampling probe shall be no greater than specified (see 3.1). 3.6.4 Sampling probe attenuation. when antennas are tested as specified in 4.5.4, the sampling probe attenuation shall be no greater than specified (see 3.1). 3.6.5 Radiation pattern. When tested as specif
29、ied in 4.5.5, the gain of the antenna system in the region extending completely around the antenna, in azimuth (), shall, at each zenith angle (), be essentially omnidirectional with nulls no greater than 2.0 dB down from the maximum. The gain at all zenith angles from 70 degrees to 110 degrees shal
30、l not be more than 2.0 dB below the gain of a matched quarter-wave stub antenna in the same location (see figure 1). 3.6.6 Polarization. When tested as specified in 4.5.6, the antenna shall transmit or receive vertically polarized signals. The axial ratios of polarization ellipses in the specified d
31、irections shall be equal to or better than that obtained in each of the same directions from a vertically polarized quarter-wave stub antenna at any frequency specified herein. 3.7 Weight. The weight of the antenna shall be in accordance with the applicable specification sheet (see 3.1). 3.8 Marking
32、. Antenna shall be marked in accordance with MIL-STD-1285 as shown on the applicable specification sheet (see 3.1) and will include the following minimum marking: Part or Identifying Number (PIN) (see 1.3), national stock number (NSN), type number (if applicable), contract number, serial number, dat
33、e code (year, month) and Manufacturer Code (FSCM). Example: PIN M25707/1-01 NSN: 5985-XXX-XXXX (as applicable) Type AT-740/A (if applicable) Contract DLA XXXXXXXXXXXXX Serial No. 1234 7701 12345 3.9 Maintainability. The antennas covered by this specification shall be considered as nonrepairable item
34、s, which, in the event of failure, shall be replaced. 3.10 Workmanship. Workmanship must be in accordance with accepted industry practices. 4. VERIFICATION 4.1 Classification of inspections. The inspections specified herein are classified as follows: a. First article inspection (see 4.3). b. Conform
35、ance inspection (see 4.4). 4.2 Inspection conditions. Unless otherwise specified, herein all inspections shall be performed at temperature of 25C 10C, barometric 650 to 800 millimeters of mercury, and relative humidity of 45 percent to 90 percent. 4.3 First article inspection. First article inspecti
36、on shall be performed by the contractor, after award of contract and prior to production, at a location acceptable to the Government. First article inspection shall be performed on sample units produced with equipment and procedures normally used in production see 6.2.c.(4). First article approval i
37、s valid only on the contract under which it is granted, unless extended by the Government to other contracts. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25707F 4 Due to similarity of items covered by specification sheets, a manufacturer
38、may apply for first article approval on items not on the current contract. Approval may be granted by successfully performing first article tests on a combination of antennas. The combination of antennas shall be as specified in contract (see 6.2). 4.3.1 Sample size. One antenna shall be subjected t
39、o first article inspection as specified in table I, unless otherwise specified by contract. 4.3.2 Inspection routine. Each sample shall be subjected to the inspections specified in table I in the order shown. TABLE I. First article inspection. Inspection Requirement paragraph Test method paragraph V
40、isual and mechanical inspection (materials, design and construction, physical dimensions, weight, marking 1/ and workmanship) VSWR - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Sampling probe VSWR - - - - - - - - - - - - - - - - - - - - - - - - - - - Sampling probe at
41、tenuation - - - - - - - - - - - - - - - - - - - - - - - - Radiation pattern - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Polarization - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - High temperature - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
42、- - - Temperature altitude - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Shock - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Vibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Humidity - - - - - - - - - - - - - - - - -
43、- - - - - - - - - - - - - - - - - - - - - Fungus - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Salt fog - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Seal test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
44、Resistance to solvents - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3.1, 3.3, 3.4, 3.7, 3.8, and 3.10 3.6.2 3.6.3 3.6.4 3.6.5 3.6.6 3.5.1 3.5.2 3.5.3 3.5.4 3.5.5 3.5.6 3.5.7 3.4.3 3.4.4 4.5.1 4.5.2 4.5.3 4.5.4 4.5.5 4.5.6 4.5.7.7 4.5.7.1 4.5.7.2 4.5.7.3 4.5.7.4 4.5.7.5 4.5.7.6 4.6 4.7 1/
45、Marking defects are based on visual examination only and shall be charged only for illegible, incomplete, or incorrect marking. 4.3.3 First article test program. The manufacturer shall prepare a test program which shall be approved by the preparing activity (see 6.4) prior to any formal first articl
46、e testing. The test program shall include the procedures and equipment used in performing the first article and acceptance tests. 4.4 Conformance inspection. 4.4.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A inspection. 4.4.1.1 Inspection lot. An i
47、nspection lot shall consist of all antennas of a particular style (see 3.1) from a production line or lines, produced essentially under the same conditions and offered for inspection during a single work month. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
48、 IHS-,-,-MIL-DTL-25707F 5 4.4.1.2 Group A inspection. Group A inspection shall consist of the inspections specified in table II, in the order shown. TABLE II. Group A inspection. Inspection Requirement paragraph Test method paragraph Visual and mechanical inspection Materials- - - - - - - - - - - -
49、- - - - - - - - - - - - - - - - - - - - - - - - - - Physical dimensions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Marking - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Workmanship - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - VSWR - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Sampling probe VSWR - - - - - - - - - -
