Mei Sun, X. Qing, Nasimuddin, Xiaoming Peng, Zhi Ning Chen
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Millimeter Wave Planar Full-range Switched Beam Grid Array Antenna and its Smart Car Radar Applications
In this paper, a patented compact planar full-range switched beam grid array antenna (GAA) is proposed for millimeter wave applications. By positioning the feeding points properly, the GAA is able to generate full-range switched beams with a specific coverage, for example, a GAA with 17 feeding ports generates 17 beams within a solid angle of θ = 14.1° to 26.3° with the directivity range from 15.3 dBi to 18.3 dBi at 93 GHz. For the 77-GHz smart car radar application, the GAA can produce 4 beams with ±15° scanning range and peak gain >18 dBi. The GAA on low cost printed circuit board (PCB) is with extremely compact structure, namely, its size is 1/70 of a conventional transmit-array.
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