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2019-01-05

A Shape-First, Feed-Next Design Approach for Compact Planar MIMO Antennas

By Binbin Yang, Juncheng Zhou, and Jacob J. Adams
Progress In Electromagnetics Research M, Vol. 77, 157-165, 2019
doi:10.2528/PIERM18100903

Abstract

Employing characteristic mode theory (CMT), a shape-first feed-next design methodology for compact planar antennas is proposed, which facilitates rapid and systematic design of self-matched, multi-port antennas with optimal bandwidth and high isolation. First, the optimal antenna shape with multiple self-resonant modes is synthesized using a binary genetic algorithm. Then, the optimal feed positions that provide good input matching and high isolation between the excitation ports are specified using a virtual probe modeling technique. A two-port microstrip antenna with an electrical size of 0.45λd×0.297λd is designed, fabricated and measured. The measured operating frequency is within 2% of the full wave simulation, and the overall S parameter characteristics and far field patterns agree well with the simulation result, validating our design methodology. Mutual coupling S21 < -30 dB at the center frequency is achieved in this design.

Citation


Binbin Yang, Juncheng Zhou, and Jacob J. Adams, "A Shape-First, Feed-Next Design Approach for Compact Planar MIMO Antennas," Progress In Electromagnetics Research M, Vol. 77, 157-165, 2019.
doi:10.2528/PIERM18100903
http://www.jpier.org/PIERM/pier.php?paper=18100903

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