Design of Dual-Polarized L-Probe Patch Antenna Arrays With High Isolation

TLDR

The study presents a dual‑polarized L‑probe patch antenna that uses a dual‑feed technique to achieve high isolation between its two input ports. The antenna is designed for ~1.8 GHz operation using a dual‑feed approach, and array isolation techniques are explored to enhance adjacent‑element isolation. The antenna achieves a 23.8 % bandwidth at SWR ≤ 2, 15 % at SWR ≤ 1.5, and over 30 dB isolation, with a two‑element array also demonstrating >30 dB isolation.

Abstract

An experimental study of a dual-polarized L-probe patch antenna is presented. The antenna is designed to operate at around 1.8 GHz. A "dual-feed" technique is introduced to achieve high isolation between two input ports. The proposed antenna has an impedance bandwidth of 23.8% (SWR/spl les/2), 15% (SWR/spl les/1.5) and an isolation over 30 dB. In array designs, techniques for improving the isolation between two adjacent elements of an antenna array are also investigated. A two-element array with more than 30 dB isolation is designed and tested.