Design of Dual-Polarization Antenna with High Cross-Polarization Discrimination

Abstract

In a small cell base station used in densely populated areas , a dual polarized multiple antenna(MIMO) is mainly used to increase the cell capacity. This paper demonstrates a dual-polarization antenna with high cross-polarization discrimination(XPD) that can improve the capacity of a small cell using a dual polarization multiple antenna (MIMO). By using the symmetric structure and differential feeding, high XPD in all directions is achieved. In addition, a very similar radiation pattern is observed between each polarization. Because of high XPD and similar radiation pattern in all directions, proposed antenna is well adopted for small-cell multiple-input multiple-output(MIMO) system. Experimental results shows that the proposed antenna has a bandwidth of 180 MHz (2.51 ∼ 2.7 GHz), a maximum gain of 4.5 dBi (3.5 ∼ 4.5 dBi), and a half-power beam width of 85 degrees. In addition, average XPD of 26.4 dB in all directions, more than 13.8 dB increase than previous dual-polarization antennas which use single emitter by using different feeding or selectively use polarization through switching.

Design of Wideband High-Isolation Dual-Polarized Aperture Coupled Microstrip Patch Antenna

“…해 단일편파 안테나와 비교해 동일한 구조에서 더 많은 채널을 생성할 수 있다. 또한, 이중편파 레이다는 넓은 채 널과 함께 서로 수직인 두 편파를 통해 더 많은 정보를 얻어내는 등 활용도가 높다 [1]～ [3] .…”