Abstract
Millimeter wave has gained great attention for 5G communications and imaging systems. Building a high gain antenna is essential to such systems. In this paper, the design of a high gain differential feeding aperture antenna in the printed ridge gap waveguide technology is presented. It has a fractional bandwidth of 16.1% at 30 GHz with S 11 < −10 dB and peak gain of 12.8 dBi. The aperture efficiency is 52% and the radiation pattern is stable over the operating frequency range. The 3-dB gain bandwidth is 15.4% dBi.
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