A metasurface-based high gain circularly polarized patch antenna with wide global bandwidth

Deepak Ram, Amit Kumar Singh and Somak Bhattacharyya

Journal of Electromagnetic Waves and Applications, 2024, vol. 38, issue 9, 1041-1055

Abstract: This paper introduces a novel metasurface (MS)-based circularly polarized (CP) microstrip patch antenna. Utilizing a square microstrip patch with plus- and diagonal-shaped slots on a 1.6 mm thick FR-4 substrate as the host antenna, the design incorporates a 4 × 4 square array MS on another 1.6 mm thick FR-4 substrate, separated by a 3.4 mm thick Teflon layer. The antenna offers a −10-dB impedance bandwidth from 5.45 to 7.55 GHz and an axial ratio (AR) bandwidth between 6.02 and 6.35 GHz, achieving a maximum realized gain of 6.3 dBic at 6.25 GHz, exhibiting right-handed circular polarization (RHCP). An equivalent circuit model is developed to validate impedance response, and the fabricated antenna closely matches simulated results. With a low profile of $ 0.42\lambda\, {\rm o} \times 0.42\lambda\, {\rm o} \times 0.033\lambda\, {\rm o} $ 0.42λo×0.42λo×0.033λo at 6.25 GHz, this CP antenna is suitable for applications like satellite communication for their uplinks and WLAN application.

Date: 2024
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DOI: 10.1080/09205071.2024.2354718

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