Millimeter-Wave Dual-Beam Scanning by Source Polarization Rotation for High-Power Applications

A novel millimeter-wave (mmWave) dual-beam an-tenna system with azimuthal scanning capability through polarization rotation suited for high-power applications is presented. The antenna and feed network are designed using metallic waveguide technology to handle high power levels. A circular waveguide antenna, differentially fed through a 4-port junction, enables beam scanning in multiple directions. Quadrature hybrid couplers are integrated to introduce the necessary phase shift between inputs, ensuring complete angular coverage. The proposed compact structure operates efficiently across the 28–32 GHz band, achieving a good impedance match and an average gain of 5 dBi.