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Low-profile, extremely wideband, dual-band-notched MIMO antenna for UWB applications

Published online by Cambridge University Press:  19 March 2019

Ankan Bhattacharya Open the ORCID record for Ankan Bhattacharya [Opens in a new window] ,
Bappadittya Roy ,
Rafael F. S. Caldeirinha Open the ORCID record for Rafael F. S. Caldeirinha [Opens in a new window]  and
Anup K. Bhattacharjee
Ankan Bhattacharya*
Affiliation:
Department of Electronics & Communication Engineering, National Institute of Technology, Durgapur, India Department of Electronics & Communication Engineering, Mallabhum Institute of Technology, Bishnupur, India
Bappadittya Roy
Affiliation:
Department of Electronics & Communication Engineering, Madanapalle Institute of Technology & Science, Madanapalle, India
Rafael F. S. Caldeirinha
Affiliation:
Instituto de Telecomunicações, Leiria and Polytechnic Institute of Leiria, Leiria, Portugal
Anup K. Bhattacharjee
Affiliation:
Department of Electronics & Communication Engineering, National Institute of Technology, Durgapur, India
*
Author for correspondence: Ankan Bhattacharya, E-mail: [email protected]
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Abstract

In this article, an extremely wideband, isolation-enhanced, low-profile “Multiple-Input-Multiple-Output” (MIMO) antenna along with dual-band-notched features has been investigated. The antenna proposed herein, possesses two mutually orthogonal staircase-etched radiators for achieving a wide bandwidth. The radiating elements are placed mutually perpendicular in order to achieve polarization diversity and high isolation, i.e. for minimization of mutual coupling effect between adjacent radiating elements. The antenna exhibits an extremely wide frequency bandwidth covering 1.2–19.4 GHz except two frequency band notches centered at 3.5 and 5.5 GHz, respectively, originated due to the incorporation of a “Rectangular Complementary Split Ring Resonator (RCSRR)” structure and by etching dual “L-shaped” slits in the ground plane. The center frequency of the notched bands is adjusted by fine tuning of the dimensions of the incorporated band-notching structures. Isolation level (S21) better than −20 dB has been obtained due to the insertion of a “T-shaped” parasitic element as a decoupling structure. A prototype of the proposed antenna having dimension of 20 mm × 20 mm (0.08 λo × 0.08 λo) is fabricated and the antenna responses have been measured. Obtained results show that the miniaturized MIMO diversity antenna is undoubtedly a capable contender for communications supporting an extremely wide impedance bandwidth along with band-notched features for WLAN and WiMAX.

Keywords

Compactextremely wide bandisolation enhancedMIMO antennaband-notched characteristics
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Special Issue 7: MIKON 2018 / EuMW 2018 (Part II) , September 2019 , pp. 719 - 728
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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