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AN/TPQ-11

Description of the radar set, tactical-technical characteristics

Figure 1: AN/TPQ-11

Figure 1: AN/TPQ-11

Specifications
frequency: 34.5 … 35.2 GHz
(Ka-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 1 000 Hz
pulsewidth (τ): 0.5 µs
receive time:
dead time:
peak power: 80 … 120 kW
average power:
instrumented range:
range resolution:
accuracy:
beamwidth:
hits per scan:
antenna rotation:
MTBCF:
MTTR:

AN/TPQ-11

AN/TPQ-11 was 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.