Two port CPW‐fed MIMO antenna with wide bandwidth and high isolation for future wireless applications

Abstract

A compact size, coplanar waveguide (CPW) fed two-antenna multiple input multiple output (MIMO) with high isolation and excellent impedance matching operating in n77/n78/n79 5G NR sub-6 GHz/Wi-Fi-5/V2X/DSRC/ Wi-Fi-6/INSAT-C is proposed for future wireless applications. Each antenna element is a CPW-fed antenna type composed of an "inverted-A," "y-shaped,"and "small extended stub" structures. The two-antennas are deployed in the same orientation at an edge-to-edge distance of 0.06λ (λ represents free-space wavelength at 3.70 GHz) on a shared rectangular substrate having designed footprint of 0.57λ × 0.39λ. To attain high isolation of greater than 20 dB in the desired bands of interest, a novel comb-shaped isolating structure is deployed between the two antenna elements. From the measured results, the proposed MIMO antenna has exhibited wide 10-dB impedance bandwidth of 88.57%(3.00-7.70 GHz), good gain above 3 dBi and efficiency larger than 78% throughout the desired operating bands. Moreover, the MIMO diversity performance metrics including envelope correlation coefficient (ECC), diversity gain (DG), mean effective gain (MEG), total active reflection coefficient (TARC), channel capacity and channel capacity loss (CCL) are also achieved.

RETRACTED: Design of Metamaterial Loaded Wideband Sub-6GHz 2×1 MIMO Antenna with Enhanced Isolation Using Characteristic Mode Analysis

“…Also, combining decoupling structures with other techniques such as a matching network in [9] and an interdigital capacitor in [10] provides improved isolation levels. Authors in [11,12] have implemented comb-shaped and modi ed T-shaped ground planes for isolation enhancement. Utilizing defected ground structures (DGS) as proposed in [13,14] for increment in isolation levels is also popularly adapted.…”

“…Further, a combined methodology of implementing both CMA and metamaterials proposed in [31][32][33] suggests a unique approach to improving isolation levels within MIMO antenna elements. The designs proposed in [5][6][7][8][9][10][11][12] exhibit a high level of isolation levels (S 12 >-20dB) along with wide bandwidth; however, structures are quite complex and bulky. The technique implemented in [13] does improve isolation level to -15dB but has a large area, whereas in [14], high isolation is achieved within a narrow bandwidth.…”

Design and Performance Analysis of a Compact Planar MIMO Antenna for IoT Applications

“…The adjacent radiating antennas affect the overall efficiency and operating bandwidth of the MIMO system [ 39 ]. In order to take this impact into account, a new metric TARC was introduced.…”

Multiband hybrid MIMO DRA for Sub‐6 GHz 5G and WiFi ‐6 applications

“…4 A number of printed MIMO antennas have been suggested in the literature. [5][6][7][8][9][10] Through the neutralization line, 5 defective grounding structure, 6 and the use of directional antenna elements, 7 the inter element isolation between the elements of the MIMO configuration can be increased. The advantages of microstrip patch antennas are that they are low cost and low profile.…”