Description of the radar set, tactical-technical characteristics
Figure 1: AN/TPQ-11
|frequency:||34.5 … 35.2 GHz
|pulse repetition time (PRT):|
|pulse repetition frequency (PRF):||1 000 Hz|
|pulsewidth (τ):||0.5 µs|
|peak power:||80 … 120 kW|
|hits per scan:|
The AN/TPQ-11 was an operating in Ka-Band weather radar for cloud detecting. AN/TPQ-11 continuously detects and records the height and density profiles of clouds and precipitation directly above the radar. The TPQ-11 was capable of detecting clouds at altitudes between 500 and 60,000 feet.
The transmitting antenna is a 7-foot parabolic reflector that is excited by a rectangular horn and waveguide. A radiation shield, made of microwave-absorbent material, is attached to the outer rim of the transmitting antenna to absorb side-lobe energy. The radar set has a separate receiving antenna. The Transmitter used a magnetron. The radar showed the data on a modified A-scope and on a permanent paper recording.