Dual-Band WLAN Diversity Antenna System With High Port-to-Port Isolation

Abstract

In this letter, an innovative technique is proposed to enhance the port-to-port isolation of two closely spaced dual-band radiating elements in the WLAN 2.4-2.5-GHz and 5.15-5.825-GHz frequency bands. This broadband technique consists in inserting an optimized parasitic element between the two antennas of a multiple-input-multiple-output (MIMO) set-top box. High port-to-port isolation is obtained, and the computation of the diversity performance shows suitability for enhanced diversity and MIMO applications.Index Terms-Diversity and multiple-input-multiple-output (MIMO) techniques, dual-band, isolation, multiantenna systems, parasitic element, WLAN.

Design of a Compact Wideband Mimo Antenna for Mobile Terminals

“…Various methods have been devised to improve isolation between the elements of a narrowband MIMO antenna, e.g., [3][4][5][6][7][8][9][10][11][12]. In [3,4], good isolation is achieved by adding parasitic elements, which can create a reverse coupling to reduce mutual coupling.…”

Diversity and Directivity Mode-Switchable Planar Antenna Array

“…이러한 환경에서 무선 연결의 품질과 신뢰성 향상을 위해 다이버시티 안테나 기술이 도입되었으며, 현재 시장 의 요구에 부응하면서 꾸준한 연구가 진행되고 있다 [2]～ [4] . 기본적으로 다이버시티 안테나는 패턴, 편파, 주파수, 공간 다이버시티의 네 가지 방식으로 구현 할 수 있으며, 구분된 기법들은 각각의 통신 환경에 맞게 사용되고 있다 [5], [6] .…”

A Printed Wideband Mimo Antenna System for Gsm1800/1900, Umts, Wlan2450, Lte2300/2500, and GPS Applications

“…In [7], an isolation structure, formed by parasitic elements, is attached to the ground plane in order to achieve high isolation. In [8], a protruded ground plane is employed as an isolation structure, while in [9], a parasitic element is inserted between two radiating elements to enhance their port-to-port isolation. Radiation pattern diversity technique has also proven to be an effective method for achieving highly isolated MIMO elements as illustrated in [3] and [10].…”