Abstract
In this paper, a Circularly Polarized (CP) Magneto-Electric (ME) dipole antenna excited by low loss Printed Ridge Gap Waveguide (PRGW) feed network is proposed. The PRGW design consists of substrate filled periodic mushrooms arranged around the ridge of the transmission line. An air gap layer is added above the ridge structure covered with a top metallic layer. The PRGW excites the ME dipole antenna through a transverse radiating slot above the air gap. A ME dipole antenna is designed in the form of horizontal trapezoidal metallic patches supported with vertical pins. It is operating over the frequency band from 54 GHz to 68 GHz where the reflection coefficient is below -10 dB. The maximum gain is 8 dB and the axial ratio bandwidth with maximum value 2.5 dB is achieved all over the band.
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