Shows enhanced gain and bandwidth in circularly polarized antennas for millimeter-wave satellite applications, suggesting improved performance in broadband communication.
An ultra‐wideband circular polarized (CP) antenna array with nonperiodic elliptical shape metasurface (MTS) for millimeter‐wave (mm‐w) applications is proposed in this paper. The element in this array uses fragmented elliptical patches as the MTS and features an elliptical notch microstrip patch beneath it, acting as the primary radiator. Characteristic mode analysis (CMA) was used to analyze the evolution process of the structure and demonstrate the working principle of ∣S 11 ∣ and axial ratio (AR) bandwidth broadening. Based on the proposed element, a 4 × 4 antenna array is designed to achieve higher gain. And the element and arrays are fabricated and measured to verify the design. The measured performance of the proposed element achieves an impedance bandwidth of 89%, covering the frequency range from 15.5 to 40.5 GHz, along with an AR bandwidth of 62.3% (16–30.5 GHz), and reaches a maximum gain of 8 dBi. For the antenna array configuration, the impedance bandwidth spans from 15 to 41 GHz, while the AR bandwidth extends over 17.7–33 GHz, and the peak gain reaches 17.9 dBi. This design highly appropriates for broadband applications in mm‐w satellite applications.
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Shen et al. (2026) studied this question.
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