Field Decorrelation and Isolation Improvement in an MIMO Antenna Using an All-Dielectric Device Based on Transformation Electromagnetics - Université Paris Nanterre Access content directly
Journal Articles Sensors Year : 2021

Field Decorrelation and Isolation Improvement in an MIMO Antenna Using an All-Dielectric Device Based on Transformation Electromagnetics

Usman Qureshi
Muhammad Umar Khan
  • Function : Author
Mohammad Sharawi
Raj Mittra
  • Function : Author

Abstract

This work presents a new technique for enhancing the performance of a multiple-input multiple-output (MIMO) antenna by improving its correlation coefficient ρ. A broadband dielectric structure is designed using the transformation electromagnetics (TE) concept to decorrelate the fields of closely placed radiating elements of an MIMO antenna, thereby decreasing ρ and mutual coupling. The desired properties of the broadband dielectric wave tilting structure (DWTS) are determined by using quasi-conformal transformation electromagnetics (QCTE). Next, the permittivity profile of the DWTS is realized by employing air-hole technology, which is based on the effective medium theory, and the DWTS is fabricated using the additive manufacturing (3D printing) technique. The effectiveness of the proposed technique is verified by designing two-element patch-based MIMO antenna prototypes operating at 3 GHz, 5 GHz, and 7 GHz, respectively. The proposed technique helped to reduce the correlation coefficient ρ in the range of 37% to 99% in the respective operating bandwidth of each MIMO antenna, thereby, in each case, improving the isolation between antenna elements by better than 3 dB, which is an excellent performance.
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Origin : Publication funded by an institution

Dates and versions

hal-04177646 , version 1 (15-01-2024)

Identifiers

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Usman Qureshi, Muhammad Umar Khan, Mohammad Sharawi, Shah Nawaz Burokur, Raj Mittra. Field Decorrelation and Isolation Improvement in an MIMO Antenna Using an All-Dielectric Device Based on Transformation Electromagnetics. Sensors, 2021, 21 (22), pp.7577. ⟨10.3390/s21227577⟩. ⟨hal-04177646⟩
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