Design Procedure of Two-Dimensional Circularly Polarized Slotted Waveguide Antenna Arrays

摘要

This paper presents a procedure for the design of a 2D Slotted Waveguide Antenna (SWA) array having circular polarization. The 2D array is formed by a defined number of 1D branchlines broadwall SWAs, which are fed using an extra broadwall SWA. The SWA branchlines have cross-shaped slots that radiate with a circular polarization. The dimensions of these slots are optimized for best performance. The feed SWA is made with rectangular slots, which are designed to achieve a low SLL. An example SWA with 10 χ 10 slots is designed using this procedure, and the design results are reported in this paper.