Abstract：Multi-beam antenna can generate multiple independent and uncorrelated high gain narrow beams through the feed, which can not only solve the problem of high loss and signal interference of millimeter wave in free space, but also dynamically control the beam direction, achieve beam switching and expand the signal coverage. Based on Butler matrix and multi-beam antenna theory, a Ka-band multi-beam antenna subsystem is designed in this paper. Three basic units of broadband quadrature coupler, phase shifter and cross junction are designed by copper based micro-coaxial process to achieve 4 × 4 Butler matrix, using Vivaldi antenna1 × 4 antenna array is designed with Butler matrix as its feed phase network. Using copper based micro coaxial flip chip packaging technology, the heterogeneous integration of copper based micro coaxial and active chip is realized. The input port of Butler matrix is integrated with switch chip, and the output port of Butler matrix is integrated with amplifier chip. Finally, Ka-band Butler matrix feed of 1 × 4 multi beam antenna subsystem is simulated and designed. In the frequency band of 28 ~ 35 GHz, the gain of the multi beam antenna can reach 14.47 dBi, and the maximum beam coverage can reach ±32°, which is conducive to improving the signal-to-noise ratio, communication capacity, anti-interference ability and signal coverage of the millimeter wave communication system.
万浩, 顾村锋, 计淞耀, 靳子凡, 段宇文, 许进. 基于铜基微同轴线的Ka波段多波束天线子系统仿真建模技术[J]. 空天防御, 2022, 5(4): 53-59.
WAN Hao, GU Cunfeng, JI Songyao, JIN Zifan, DUAN Yuwen, XU Jin. Simulation Modeling and Design of Ka-band Multi-Beam Antenna Subsystem Based on Copper Based Micro-Coaxial Line. Air & Space Defense, 2022, 5(4): 53-59.
