School of Electronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 611731, China.
Sensors (Basel). 2023 Jun 21;23(13):5781. doi: 10.3390/s23135781.
A high-gain low-profile reflector antenna with dual-band radiation ability is presented in this paper. The antenna achieves a relative 2 dB gain bandwidth of 10% around , and a relative 2 dB gain bandwidth of 20%, around , where and are the center operating frequencies of the frequency bands of 29.432.4 GHz and 142174 GHz, respectively. To achieve the dual-band radiation ability, a composite dual-band feed with an / ratio of around 5 is proposed as the feed for the reflector antenna, which includes a higher-band circular waveguide and a lower-band coaxial horn. The metallic elliptical surface serves as the subreflector (SR) in the higher band, while the SR is the planar reflectarray in the lower band. Due to the design of the dual reflector, the dual-band reflector antenna features a low focal-to-diameter (F/D) ratio of approximately 0.2. According to the simulated results, the proposed reflector antenna achieves efficiencies of 59.0% and 42.9% at and , respectively. For verification purposes, a Ku/E-band scaled prototype is manufactured. The measured VSWRs, radiation patterns, and gains are in reasonable agreement with the simulated ones, proving the correctness of the proposed design method.
本文提出了一种具有双频辐射能力的高增益低剖面反射器天线。该天线在 29.432.4 GHz 频段和 142174 GHz 频段的中心工作频率 和 处，实现了相对 2 dB 增益带宽为 10%和相对 2 dB 增益带宽为 20%。为了实现双频辐射能力，提出了一种 / 比值约为 5 的复合双频馈源作为反射器天线的馈源，其中包括高带圆形波导和低带同轴喇叭。金属椭圆面作为高带的副反射器（SR），而在低带中 SR 是平面反射阵。由于双反射器的设计，双频反射器天线具有低焦距与直径比（F/D）约为 0.2。根据仿真结果，在 和 处，所提出的反射器天线分别实现了 59.0%和 42.9%的效率。为了验证目的，制造了一个 Ku/E 波段缩比原型。测量的 VSWR、辐射图和增益与仿真结果吻合较好，证明了所提出的设计方法的正确性。
