A Broadband Reflectarray Antenna for Microwave Power Transmission

Advances in Astronautics Science and Technology Pub Date : 2022-03-07 DOI:10.1007/s42423-022-00103-x

Huaiqing Zhang, Jiapeng Wang, Hui Xiao, Xin Wang

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引用次数: 1

Abstract

In this work, a single-layer reflectarray antenna design operating at the center frequency of 5.8 GHz for microwave power transmission is proposed. The reflectarray unit embodies a slotted circular patch loaded with four symmetrical resonant phase delay lines. By adjusting the length of the phase delay lines, a reflection phase compensation range of about 400° is achieved. The reflectarray uses the low-cost F4B material as the substrate. The feed horn antenna adopts an offset angle of 15°, and the focal diameter ratio (F/D) is 1.2. Based on the reflectarray unit design, a 361-unit reflectarray antenna is designed with the desired pitch angle and azimuth of the reflected wave to be (0°, 0°). The measured gain is 27.3 dBi at the center frequency of 5.8 GHz. The aperture efficiency and 1 dB reflectarray bandwidth are 51% and 20.4% (5.01–6.15 GHz) respectively. In addition, at the center frequency of 5.8 GHz, the side-lobe level and cross-polarization level are lower than − 18 dB and − 30 dB, respectively.

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用于微波功率传输的宽带反射天线

本文提出了一种工作在中心频率为5.8 GHz的单层反射天线，用于微波功率传输。反射单元包含一个带四根对称谐振相位延迟线的开槽圆形贴片。通过调整相位延迟线的长度，实现了约400°的反射相位补偿范围。反射镜采用低成本的F4B材料作为衬底。馈电喇叭天线采用15°偏置角，焦径比(F/D)为1.2。在反射阵单元设计的基础上，设计了361单元反射阵天线，反射波的期望俯仰角和方位角为(0°，0°)。在中心频率为5.8 GHz时，测得增益为27.3 dBi。孔径效率为51%，1 dB反射带宽为20.4% (5.01-6.15 GHz)。此外，在中心频率为5.8 GHz时，副瓣电平和交叉极化电平分别低于- 18 dB和- 30 dB。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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