Isolation Enhancement of a Very Compact UWB-MIMO Slot Antenna With Two Defected Ground Structures

Author

Chao-Ming Luo ; Jing-song Hong ; Lin-Lin Zhong

Author_Institution

Sch. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

14

fYear

2015

fDate

7/7/1905 12:00:00 AM

Firstpage

1766

Lastpage

1769

Abstract

A very compact ultrawideband (UWB) multiple-input multiple-output (MIMO) antenna with high isolation is presented in this letter. The proposed antenna, consisting of two UWB slot antennas, has a very compact size of 22 ×26 mm², which is smaller than most of UWB antennas only with single antenna element. A T-shaped slot is etched on the ground to improve the impedance matching characteristic in the low-frequency and reduce the mutual coupling for the frequencies ≥ 4 GHz. By etching a line slot to cancel out original coupling, isolation enhancement at the 3-4 GHz band is achieved. The antenna possesses a low mutual coupling of less than - 18 dB over the operating band from 3.1-10.6 GHz. The performance of this antenna both by simulation and by experiment indicates that the proposed antenna is a good candidate for UWB applications.

Keywords

MIMO communication; defected ground structures; electromagnetic coupling; slot antenna arrays; ultra wideband antennas; T-shaped slot; defected ground structure; frequency 3 GHz to 10.6 GHz; impedance matching characteristic; line slot etching; mutual coupling reduction; ultrawideband multiple-input multiple-output antenna; very compact UWB-MIMO slot antenna isolation enhancement; Antenna measurements; MIMO; Resonant frequency; Slot antennas; Ultra wideband antennas; High isolation; miniaturization; multiple-input multiple-output (MIMO) antenna; ultrawideband (UWB) antenna;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2015.2423318

Filename

7086297