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Althuwayb, Ayman Abdulhadi, Ali, Esraa Mousa, Alibakhshikenari, Mohammad, Virdee, Bal Singh, Rashid, Nasr, Kaaniche, Khaled, Atitallah, Ahmed Ben, Elhamrawy, Osama I. and Falcone, Francisco (2025) Multi antenna structure assisted by metasurface concept providing circular polarization for 5G millimeter wave applications. Scientific Reports, 15 (1) (17579). pp. 1-13. ISSN 2045-2322
This paper presents a circularly polarized multi-antenna structure designed for 5G millimeter-wave applications. The structure is based on circular patch radiators, each enhanced with metasurface (MTS) characteristics through the integration of multi-split ring slots. Each radiating element is enclosed within a decoupling wall constructed from a microstrip transmission line, which features both wide (capacitive) and thin (inductive) impedance profiles. The antennas are excited from below using metallic pins, which connect to the radiators through via-holes stemming from coplanar waveguide ports on the ground plane. Experimental results demonstrate a wide bandwidth from 25.6 to 29.7 GHz, corresponding to a fractional bandwidth of 14.82%. Additionally, the antenna exhibits stable radiation patterns, with an average gain of 2.7 dBi and a radiation efficiency of 57%. Using a single radiator configuration, a 3 × 3 antenna array was implemented. In this design, electromagnetic coupling between adjacent radiators is significantly reduced. The resulting array, measuring 20 × 20 × 0.32 mm3, achieves excellent performance across a wide frequency range from 24 to 31 GHz, corresponding to a bandwidth of 25.45%. Key metrics include an average isolation between radiating elements exceeding 17 dB and an average gain and radiation efficiency of 9.0 dBi and 91.5%, respectively.
Available under License Creative Commons Attribution 4.0.
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