Abstract
A multi-feed Ka-band sin-shape corrugation antipodal Fermi-linear tapered slot antenna subarray is presented. The proposed prototype consists of four antenna elements excited by multimode beamforming network as an efficient method to perform beamforming operation without any use of couplers and phase shifters. It is implemented using substrate integrated waveguide technology. The four-element subarray has a measured gain of 11.45-13.86 dB along with beam scanning range of 24° and a narrow beamwidth (11.85°-13.05°) over 29-36 GHz. The measured mutual coupling between the four antenna ports is better than - 20 dB over the frequency range 29-36 GHz. The proposed multibeam antenna can be implemented for applications related to target tracking and imaging systems.
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