Abstract
In this paper, a 36×36 design of a thinned phased array antenna with subarrays is proposed. Binary-genetic learning particle swarm optimization (GLPSO) was used to design a thinned phased array antenna with a thinning factor of 60 % to 65 %, and continuous-GLPSO was used to apply 36 subarray shapes. The RF beam steering range was an azimuth/elevation of 40°, the sidelobe levels (SLLs) were 26.67 dB and 28.43 dB, and the half-power beamwidths (HPBWs) were 4.6° and 4.7°. When the subarrays were applied, the digital beam steering range was HPBW/2° in the azimuth/elevation direction. SLLs were 22.52 dB and 22.53 dB respectively, and the HPBWs were all 3.5°. When RF beam and digital beam steering are simultaneously performed in the azimuth/elevation direction by 40°+HPBW/2°, the SLLs are 20.16 dB and 21.25 dB respectively, and the HPBWs are all 5°.
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