1986 Volume 1986 Issue 52 Pages 19-44
Development of a new model of Airport Surveillance Radar (ASR) has been made, intending to provide a draft for the specification of CAB's ASR.
The radar system is designed to raise the credibility of primary radar by increasing its capability to detect aircraft in the presence of severe ground clutter and precipitation. For this purpose, several new techniques are applied; dual-beam antenna system, klystron power amplifier with de-Q-ing circuit, RF-STC, LOG/CFAR and Range Azimuth Gate.
An evaluation test has been made where emphasis is laid on the performance test of new techniques and following results have been obtained.
The dual-beam antenna system provides 14 to 28 dB better target signal-to-clutter ratio than single-beam one within 15 NM of radar site.
The transmitting pulse stability is at 39.3 dB in the case of staggered PRF by using de-Q-ing circuit, which shows an improvement of about 10 dB compared with existing magnetron radar. MTI improvement factor is 35.0 dB.
A 33 dB MTI cancellation ratio is measured in which normal operation condition by using radar performance evaluation equipment that developed in ENRI.
Farther more, the radar cross section of B-99 is measured and the results give 8.7m2 in inbound target and 1.9m2 in outbound one.
