A Dual-Polarized Planar Antenna Array Differentially-Fed by Orthomode Transducer

Abstract

This paper presents a new design of a differentiallyfed substrate integrated planar antenna array with dualpolarization. Compared with the traditional dual-polarized antenna arrays, the proposed array antenna has the advantages of simple configuration, high cross-polarization discrimination (XPD) and high gain. 2 × 2-element subarray design with a vialoaded crossover structure is used, which reduces the complexity of the array antenna. The operation bandwidth is improved by generating three resonances in the subarray. An 8 × 8 antenna array is designed, prototyped and tested to exemplify its potential applications in large dual-polarized antenna arrays. A planar orthomode transducer is used to achieve differential excitation for the antenna array. The measured results show that the proposed antenna array has an impedance bandwidth of 19.2-20.7 GHz for |S 11 | < −10 dB and port isolation higher than 20 dB. The array antenna exhibits a high XPD of 43 dB and a flat gain about 22.2 dBi within the bandwidth.

Polarization Reconfigurable Sequentially Rotated Dielectric Resonator Antenna Array

“…DCP antennas are good candidates for enhancing system reliability and channel capacity from among the various solutions that have been proposed to improve communication performance [1]. These antennas have several appealing features, for example resisting the multipath fading effect, enhancing the system capacity by conquering frequency reuse, their ability to function numerous wireless standards, decent port isolation, and reduced size and overall cost [2].…”