SIDELOBE BLANKING SYSTEM FOR PHASED ARRAY RADAR

摘要

An embodiment of the present invention transmits a radio wave toward a target, an array antenna element for receiving a radio wave reflected from the target as a received signal, and processing the received signal to generate a main channel output signal including the output value and incident angle information A main channel beam forming unit, a spatial delay line canceller for processing the received signal to generate a first sub-lobe channel output signal having a null signal formed at a direct-angle angle, and a null for the direct-angle angle by processing the first sub-lobe channel output signal. By calculating a ratio value between the main channel output signal and the second sublobe channel output signal, and a sublobe channel beam forming unit including an asynchronous accumulator for generating a second sublobe channel output signal having a predetermined output value at all incident angles other than the signal, The ratio value is compared with a threshold set by the user, and if the ratio value is smaller than the threshold value, the main channel output signal is used as an input signal for detecting the target. Comprising a block for preventing the use, and a target detection unit for receiving the main channel output signal when the ratio value of the main channel output signal and the second sub-lobe channel output signal is greater than the threshold value to use as an input signal for detecting the target; A side lobe blocking system of a phased array radar is disclosed.