Design and fabrication of a dual-polarized corporate-feed waveguide 32×32-slot array antenna with an orthomode transducer for 40 GHz band

A dual-polarized corporate-feed waveguide 32 × 32-slot array antenna with an orthomode transducer is designed for 40 GHz band (41~42 GHz) in order to integrate their two input ports. The simulation by HFSS gives the bandwidth for VSWR lower than 1.5 of 6.5 % (S
₁₁
) and 3.8 % (S
₂₂
), respectively, at the design frequency of 41.5 GHz. S
₁₂
is achieved less than -20 dB over the bandwidth. The simulated realized gain for both polarizations is 38.1 dBi at 41.5 GHz with the antenna efficiency of 78 %.