Wu Handong, Ren Yuhui, Wang Yingying, Zhang Kai
Xi'an HengDa Microwave Technology Development Co., Ltd., Xi'an, China.
School of Information Science and Technology, Northwest University, Xi'an, China.
Sci Rep. 2023 Oct 18;13(1):17721. doi: 10.1038/s41598-023-44941-7.
A multimode reflector antenna is a new concept proposed by our team in recent years, which does not correspond to the use of the traditional multimode feed but to innovation in the reflector design. This paper presents an S-band multimode reflector antenna based on multimode reflector theory. To achieve a flat-top beam shape, the main reflector of the antenna is divided into a middle region and an edge region. The height difference between them is approximately λ/4, and then, the reflected waves in different areas partially cancel out in the direction of maximum radiation. The voltage standing wave ratio of the antenna is less than 1.5 from 2.8 to 3.4 GHz (19.4%), and the gain is more than 29.2 dB in the same frequency band. At the same time, a good flat-top beam is achieved in the range of ± 2°. The antenna can be used for satellite constellation tracking and other systems that require high-gain flat-top beams.
多模反射器天线是我们团队近年来提出的一个新概念，它并非对应于传统多模馈源的使用，而是反射器设计方面的创新。本文提出了一种基于多模反射器理论的S波段多模反射器天线。为实现平顶波束形状，将天线的主反射器划分为中间区域和边缘区域。它们之间的高度差约为λ/4，然后，不同区域的反射波在最大辐射方向上部分抵消。天线在2.8至3.4 GHz（19.4%）频段内的电压驻波比小于1.5，在同一频段内增益大于29.2 dB。同时，在±2°范围内实现了良好的平顶波束。该天线可用于卫星星座跟踪等需要高增益平顶波束的系统。
