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Dual-band aperture-shared antenna with pattern and polarization diversities for ISM applications

Wenfei Yin, Jiacheng Si, Chunhua Li and Salam K. Khamas

Journal of Electromagnetic Waves and Applications, 2025, vol. 39, issue 15, 1858-1871

Abstract: This paper presents a dual-band aperture-shared planar antenna for ISM applications, operating at 2.45 and 5.8 GHz. It integrates a rectangular dielectric resonator antenna (RDRA) with a cross-slot feed and circular patch for circular polarization and high gain in the upper band, achieving a broadside gain of 10.05 dBi and 4.15% axial ratio bandwidth. A modified Alford loop antenna in the lower band provides a gain of 2.3 dBi and 14.1% impedance bandwidth. Simulations and measurements confirm performance with over 20 dB port isolation. Compared to existing designs, it offers superior pattern/polarization diversity, bandwidth, and gain in a compact form factor, suitable for modern wireless systems.

Date: 2025
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DOI: 10.1080/09205071.2025.2530627

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