MIL-DTL-25708/1H
REQUIREMENTS (ANTENNA):
Dimensions and configuration: See figure 1.
Materials:
Base: Aluminum alloy in accordance with ASTM B85/B85M, alloy SC84B.
Cover: Suitable material that will resist erosion of impinging particles at velocities up to Mach 2.
Temperature operating range: -55°C to 250°C.
Static load: 15 psig.
Frequency range: 0.960 to 1.220 GHz.
Impedance: 50 ohms nominal.
VSWR:
Antenna:
1.40:1 maximum from 0.960 to 1.220 GHz.
1.30:1 maximum from 1.000 to 1.100 GHz.
Sampling probe: 1.50:1 maximum from 0.960 to 1.220 GHz.
Power: 4 kW peak, 100 watts average.
Weight: 10 ounces maximum.
Part or Identifying Number (PIN): See table I.
Data list: A data list shall accompany each antenna with VSWR measurement values made at
0.960, 1.000, 1.100, and 1.200 GHz.
REQUIREMENTS (ADAPTER PLATE):
Dimensions and configuration: See figure 2.
Material: Aluminum alloy in accordance with SAE-AMS-QQ-A-250, Temp T4.
Finish: Anodize in accordance with MIL-A-8625, Type I, Class I.
TABLE I. PIN.
PIN
Description
M25708/1-01
AT-741B/B Antenna
M25708/1-02 1/
AT-741B/B Adapter (anodized)
1/ Inactive for new design. To be used to replace existing AS-133/APX
and AT-722/APX antennas by using antenna AT-741B/B (M25708/1-01)
and antenna adapter plate (M25708/1-02).
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