Dual Circularly Polarized Slotted Waveguide Antenna at W-Band

This article proposed a low-profile dual circularly polarized leaky wave antenna designed for W band applications. The unit element of this antenna comprises of a unique combination of longitudinal and transverse slots, that are positioned on the broad wall of the waveguide. The precise arrangement of slot offset positions and lengths results in the generation of circular polarization (CP). The presented design facilitates the realization of dual CP by simply switching the antenna's ports. The presented antenna operates from 82 GHz to 86 GHz frequency band, and exhibits a maximum gain of 19.58 dBi. Its all-metallic structure, easy fabrication process, and robust structure make it a highly promising choice for W band space applications.