Colored resin fiber material based dual port compact reconfigurable MIMO antenna with reduced mutual coupling for wideband applications

Raju Pandey, Ashim Kumar Biswas and Ujjal Chakraborty

Journal of Electromagnetic Waves and Applications, 2025, vol. 39, issue 10, 1133-1155

Abstract: This work introduces a compact dual-port MIMO antenna made from a colored resin fiber substrate material featuring switchable broad dual-frequency band properties. The proposed antenna design incorporates two PIN diode switches, dual resonators, and two trapezoidal-shaped ground slots. These two switches allow antennas to change their operating band. The antenna spans 3.95 to 7.12 GHz in one switching state and 6.14 to 8.84 GHz in another, covering WLAN (5.15-5.35 GHz/5.725-5.825 GHz), C band uplink (5.925-6.425 GHz), downlink defense (7.2-7.7 GHz), and ITU band (8-8.5 GHz). The resonator and ground slot combination ensure exceptional antenna isolation, surpassing 21 dB in the lower band and exceeding 24 dB in the upper band. Throughout all switching states, the antenna demonstrates favorable diversity characteristics, with a low ECC ( 9.96 dB), minimal CCL ( 0.1 dB) and stable TARC characteristics.

Date: 2025
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DOI: 10.1080/09205071.2025.2497453

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