An edge-slot waveguide array antenna is proposed to serve as the receive antenna in an omnidirectional radar system. The general design process for the antenna is described and the antenna is modeled in Ansoft HFSS and EMSS FEKO. Results from these simulations are compared with prototype measurements to characterize the antenna. The results indicate an S 11 <-10 dB bandwidth of 6.5%, half-power beamwidth of 14° in azimuth and 96° in elevation and a realized gain of 12.65 dBi. I.
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