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AN/APX-7

Description of the radar set, tactical-technical characteristics

Figure 1: Antenna AS133/APX used by AN/APX-7

Figure 1: Antenna AS133/APX used by AN/APX-7

Specifications
frequency: 1 030 MHz and 1 090 MHz
(L-band)
pulse repetition time (PRT):
pulse repetition frequency (PRF):
pulsewidth (τ):
receiving time:
dead time:
peak power: 2 kW
average power:
instrumented range:
range resolution:
accuracy:
beamwidth:
hits per scan:
antenna rotation:
MTBCF:
MTTR:

AN/APX-7

AN/APX-7 is an airborne, operating in the L-band radar recognition set (interrogator-responder, IFF), designed to challenge the identity of aircrafts and determine if they are friend or foe (British designator: Airborne interception Radar Mk IX). It could display its interrogation results as an additional pulse on the A-scope of the AN/APS-20.

The antenna is a flat, diamond-shaped metal plate enclosed in a streamlined plastic housing. A bezel holds the housing to its mounting plate, and the whole assembly is bolted to the skin of the aircraft. The antenna’s r-f line section, which connects to the receiver-transmitter cable, projects into the aircraft through a cutout in the aircraft skin. The antenna weighs one pound and is (overall) 9-13/32 inches long, 3-11/64 inches wide, and 7-3/16 inches high. It is mounted vertically on the center line at the lowest point on the aircraft.[1]

Source:

  1. AFCRC-TR-60-134(Ⅳ), ’Antenna Catalog, Volume Ⅳ, Aircraft Antennas’ October 1960, Georgia Institute of Technology, Engineering Experiment Station.