Adaptive anti-interference technique using subarrays in HF surface wave radar

To improve the capability of high frequency (HF) surface wave radar to suppress interference, an adaptive anti-interference technique was evaluated by using subarrays in OSMAR2000 (Ocean State Monitor and Analysis Radar, manufactured in 2000). The authors propose a scheme to suppress the external HF radio strong interference based on OSMAR2000 radar without increasing any auxiliary facilities, and some radar experiments were carried out by using a monopole as the main antenna and the other three vertical monopoles as auxiliary antennas. The results of a preliminary study of an adaptive system with subarrays for the suppression of strong interference are presented. The results of the study show that the technique worked well against the observed interference.