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Characteristic-Mode-Analysis-Based Compact Vase-Shaped Two-Element UWB MIMO Antenna Using a Unique DGS for Wireless Communication

Authors :
Subhash Bodaguru Kempanna
Rajashekhar C. Biradar
Praveen Kumar
Pradeep Kumar
Sameena Pathan
Tanweer Ali
Source :
Journal of Sensor and Actuator Networks, Vol 12, Iss 3, p 47 (2023)
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

The modern electronic device antenna poses challenges regarding broader bandwidth and isolation due to its multiple features and seamless user experience. A compact vase-shaped two-port ultrawideband (UWB) antenna is presented in this work. A circular monopole antenna is modified by embedding the multiple curved segments onto the radiator and rectangular slotted ground plane to develop impedance matching in the broader bandwidth from 4 to 12.1 GHz. The UWB monopole antenna is recreated horizontally with a separation of less than a quarter wavelength of 0.13 λ (λ computed at 4 GHz) to create a UWB multiple input and multiple output (MIMO) antenna with a geometry of 20 × 29 × 1.6 mm3. The isolation in the UWB MIMO antenna is enhanced by inserting an inverted pendulum-shaped parasitic element on the ground plane. This modified ground plane acts as a decoupling structure and provides isolation below 21 dB across the 5–13.5 GHz operating frequency. The proposed UWB MIMO antenna’s significant modes and their contribution to antenna radiation are analyzed by characteristic mode analysis. Further, the proposed antenna is investigated for MIMO diversity features, and its values are found to be ECC < 0.002, DG ≈ 10 dB, TARC < −10 dB, CCL < 0.3 bps/Hz, and MEG < −3 dB. The proposed antenna’s time domain characteristics in different antenna orientations show a group delay of less than 1 ns and a fidelity factor larger than 0.9.

Details

Language :
English
ISSN :
22242708
Volume :
12
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Journal of Sensor and Actuator Networks
Publication Type :
Academic Journal
Accession number :
edsdoj.8a7192ce80843b2891fac416b3ca5ae
Document Type :
article
Full Text :
https://doi.org/10.3390/jsan12030047