Circular Polarized Patch Antenna Array as an Element of the Antenna Field at 1.6GHz

This article presents a design of a circular patch antenna array with left-hand circular polarization with 2 × 2 elements, directional and high gain G > 11dB, simulating an S
11
< 10dB, and an axial ratio AR < 3dB at the microwave frequency of the L-band 1.585– 1.615GHz. The spacing of adjacent antenna elements is 0.5λ
0
. The antenna array is achieved by T-power divider (1: 4). the design of antenna includes a slot in the circular patch antenna, that can act as a second feed to create circular polarization, and eliminate the need for an external second feed. Also, quarter wave transformer is designed to feed to the antenna. The antenna provides a circular polarization over a wide angular range ±100°, ±80° in the plane φ = 0°, φ = 90°, respectively.