Microwave Circular Polarization Plane Array Antenna with Wideband Axial Ratio and Supressed Horizontal Power Radiation

摘要

This paper presents a microwave circular polarization plane antenna. Plane antenna provides a compact antenna, but the circular polarization roundness was not enough and narrow band. S-type routing wires and grounded collar are newly given in this paper. The former provides circuits minimizing reflection points in routing wires which contributes perfect roundness in wideband. The latter eliminates power in horizontal plane and enhances the power along vertical axis. High performance 64-antenna array was presented in this paper. Almost perfect roundness (axial ratio less than 3dB) was realized by reducing power reflections in routing wires. And directive gain 24dB, which is 3 dB enhanced by the grounded square collar, are obtained. The number of antennas 64 in an array was reduced into a half or less of conventional number 128.