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A detailed insight of 2 × 2 high isolation wideband dual notched band MIMO antenna with evolution initiated by theory of characteristics mode

Published online by Cambridge University Press:  10 February 2023

Manish Sharma Open the ORCID record for Manish Sharma [Opens in a new window] ,
Tathababu Addepalli Open the ORCID record for Tathababu Addepalli [Opens in a new window] ,
Rajasekhar Manda ,
T. Vidyavathi  and
Prabhakara Rao Kapula
Manish Sharma*
Affiliation:
Chitkara University Institute of Engineering and Technology, Chitkara University, Rajpura, Punjab, India
Tathababu Addepalli
Affiliation:
Department of ECE, Aditya Engineering College, Surampalem, A.P., India
Rajasekhar Manda
Affiliation:
Department of ECE, PACE Institute of Technology & Sciences (A), Ongole, A.P., India
T. Vidyavathi
Affiliation:
Department of ECE, Anil Neerukonda Institute of Technology and Sciences (A), Sanghivalasa, Visakhapatnam, A.P., India
Prabhakara Rao Kapula
Affiliation:
Department of Electronics and Communication Engineering, B V Raju Institute of Technology, Narsapur, Telangana 502313, India
*
Author for correspondence: Manish Sharma, E-mail: [email protected]
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Abstract

This research investigates the MIMO antenna by using the Theory of Characteristics Mode (TCM) where 10 modes are subjected in designing. Also, 5 modes are the significant mode and 2 modes correspond to non-significant which defines the operating bandwidth and notched bands. The proposed 2 × 2 MIMO antenna configuration is designed for wideband applications with a size of 0.44 × 0.68 mm2. The two isolated 12-sided polygons radiating patches placed adjacent to each other share a common ground which is printed on an FR4 substrate. The measured impedance bandwidth covers bandwidth 3.11–11.98 GHz with two bands rejecting capability: Wireless Local Area Network (WLAN) and Downlink-Uplink Satellite (DUS) system. These two interfering bands are mitigated by etching a C-type slot on the radiating patch and an inverted U-type slot in the microstrip feed. The simulated and measured results are also compared in the far-field region (Normalized Radiation Efficiency (NRE), Peak Gain (PG), and 2-D/3-D radiation pattern). Proposed MIMO antenna also offers good diversity performance with ECC2×2 < 0.00001, DG2×2 > 9.999 dB, TARC2×2 < −15.0 dB, CCL2×2 < 0.001 b/s/Hz and MEG2×2 ≅ −3.0 dB.

Keywords

Diversity performanceDUS10 modes2 × 2 MIMONREPGTCMWLAN
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Special Issue 8: EuCAP 2022 Special Issue , October 2023 , pp. 1392 - 1411
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Copyright
© The Author(s), 2023. Published by Cambridge University Press in association with the European Microwave Association

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