Split Ring Resonator-Based Bandstop Filter for Improving Isolation in Compact MIMO Antenna

Islam, Hashinur and Das, Saumya and Ali, Tanweer and Kumar, Pradeep and Dhar, Sourav and Bose, Tanushree (2021) Split Ring Resonator-Based Bandstop Filter for Improving Isolation in Compact MIMO Antenna. Sensors, 21. ISSN 1424-3210

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Abstract

The ever-growing expectation for high data rates has led to the introduction of multiple�input multiple-output (MIMO) technologies to wireless connectivity. Such a system requires an MIMO antenna with high isolation. At the same time, the MIMO dimension should not be com�promised for achieving high isolation. Thus, isolation techniques that do not allow an increase in dimension need to be fostered for MIMO antenna design. In this paper, a novel low-profile, miniatur�ized MIMO antenna with high isolation was developed considering a split ring resonator (SRR)-based bandstop filter as a decoupling network. The bandstop filter was designed with a unit cell split ring resonator structure and was deployed between two closely spaced monopole MIMO antenna elements to obtain isolation as high as 39.25 dB at 2.61 GHz. Two open-circuit stub lines were attached with the MIMO feeding network to achieve good impedance matching at resonance frequency. The proposed antenna exhibited a peak gain of 3.8 dBi and radiation efficiency of 84%. It had a low en�velop correlation coefficient (ECC < 0.12), high diversity gain (DG > 9.95 dB), low mean effective gain ratio (MEG 1/MEG 2 < 0.05 dB), and low channel capacity loss (CCL < 0.042 bits/s/Hz) at resonance frequency. The overall antenna dimension was restricted to 44 mm × 22 mm (0.38 λ0 × 0.19 λ0) for its easy integration in compact wireless devices.

Item Type: Article
Uncontrolled Keywords: MIMO antenna; decoupling network; SRR-based bandstop filter
Subjects: Engineering > MIT Manipal > Electronics and Communication
Depositing User: MIT Library
Date Deposited: 15 Jul 2021 08:42
Last Modified: 15 Jul 2021 08:42
URI: http://eprints.manipal.edu/id/eprint/156990

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