A Full Design Perspective of Port Decoupling for MIMO Antenna : Preservation of Radiation Pattern

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Detail(s)

Original languageEnglish
Journal / PublicationIEEE Transactions on Antennas and Propagation
Publication statusOnline published - 28 Oct 2024

Abstract

Whereas most studies of decoupling methods in antenna designs are limited to port isolation, this paper additionally investigates the radiation-pattern-decoupling (RPD) method to preserve the radiation pattern in a port-decoupling design. The RPD method introduce shorting vias to obtain a new current component for canceling the coupled current, leaving the original active current on the coupled antenna element. As a result, each element effectively has its own active current only, minimizing the coupling effects on the antenna port and radiation pattern. For demonstration, this RPD method is applied to a MIMO design using broadside microstrip antennas. Both 1×2 and 4×4 MIMO arrays are considered, with reasonable agreement between the measured and simulated results. Both of the arrays have an overlapping impedance and isolation bandwidth of more than 5%, with the portion isolation higher than 16.5 dB. © 2024 IEEE.

Research Area(s)

  • Microstrip antennas, mutual coupling, radiation pattern, two-dimensional array