AN/TPN-22
Description of the radar set, tactical-technical characteristics
Figure 1: AN/TPN-22
| Specifications | |
|---|---|
| frequency: | 9 000 … 9 200 MHz
( X-Band) |
| pulse repetition time (PRT): | |
| pulse repetition frequency (PRF): | 1 200 Hz |
| pulsewidth (τ): | 0.8 µs |
| receive time: | |
| dead time: | |
| peak power: | 120 kW |
| average power: | |
| instrumented range: | 3 NM (≙ 5.5 km) |
| range resolution: | |
| accuracy: | |
| beamwidth: | |
| hits per scan: | |
| antenna rotation: | |
| MTBCF: | |
| MTTR: | |
AN/TPN-22
The AN/TPN-22 all-weather landing subsystem (ALS) is a Precision Approach Radar (PAR). It is a transportable, computerized, pencil beam, 3-dimensional radar which is used for landing tactical aircraft. It is a part of the U.S. MATCALS program.
The AN/TPS-22 handles all civil and military air traffic by providing:
- Mode I: fully automatic landing capabilities;
- Mode II: ILS guidance commands to the aircraft (a crosspointer cockpit display)
- Mode III: conventional PAR, ground controlled approach (“talk down”)
The antenna uses circular polarization only. It is a planar phased array of 94 radiator groups each with a PIN-Diode phase shifter. It uses phase controlled electronically beam steering; and has an 8 degree (-1 to +7 degree) angular coverage in elevation.
The AN/TPN-22 is a track-while-scan radar. It tracks up to six aircrafts. The MTI capability includes search (2-pulse canceler) and track (3-pulse canceler).
The transmitter contains a traveling wave tube as power amplifier. It got a solid-state modulator as modernization.