Compact ultra‐wideband diversity antenna with a floating parasitic digitated decoupling structure

Abstract

A compact planar ultra-wideband (UWB) multiple-input-multiple-output antenna array with two radiating elements is proposed in this work. Elements separation is kept at 5.5 mm and the isolation is achieved with a floating parasitic decoupling structure not known for UWB diversity antennas previously. The antenna system performs very well over the entire UWB frequency range of 3.1-10.6 GHz. The mutual coupling between the radiating elements is below -20 dB in most of the band. The decoupling structure is investigated in detail and the diversity analysis of the antenna in Rayleigh fading environment for indoor and outdoor propagations is also presented by computing envelope correlation coefficients. The proposed antenna array measures 33 x 45.5 mm(2) only and it is suitable for handheld devices, personal digital assistant (PDA)s, next generation home entertainment systems and robots

Compact 1×2 and 2×2 Mimo Antennas With Enhanced Isolation for Ultrawideband Application

“…Thus, the major problem in MIMO antenna designs is to suppress the mutual coupling while maintaining a compact antenna configuration. Recently, various decoupling methods have been reported in open literature [3][4][5][6][7][8][9][10][11][12][13]. Usually, antenna elements of different types combined in [3,4] can achieve high isolation, yet the MIMO antennas possess different impedance matchings and radiation characteristics between ports.…”

“…A tree-like structure extending from the ground is adopted in [5] to cut down the wideband mutual coupling between the radiating elements. By using the parasitic elements, the MIMO antennas in [6,7] achieve isolation enhancement over a wide bandwidth. However, the wideband decoupling methods often make the antennas relatively large in size and complicated in structure.…”

Very Compact 5.5 GHZ Band-Notched Uwb-Mimo Antennas With High Isolation

“…UWB combined with multi-input multi-output (MIMO) technology should be a wonderful solution. Some MIMO antennas for UWB applications have been proposed in the past few years [3][4][5][6].…”

Design of High-Isolation Compact Mimo Antenna for Uwb Application

“…WLAN and WiMax bands were achieved by using slotted ground structure and metamaterial rectangular split ring resonator. Many MIMO antennas have been proposed to reduce the mutual coupling for UWB systems [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. In [4][5][6][7][8], various decoupling structures have been inserted between two antenna elements to enhance wide band isolation.…”