Design of Space-borne Broadband VHF/UHF Beacon Antenna

摘要

In this paper, a miniaturized space-borne broadband beacon antenna of 243MHz/406MHz is designed. Based on the improvement of the structure of the monopole antenna, the working bandwidth is effectively expanded by adopting the parallel feeding method. After the antenna structure is determined, the microwave simulation software XFDTD is used for simulation analysis. The calculation and analysis results show that the standing wave ratio SWR is less than or equal to 2.0 in the 243MHz/406MHz working bandwidth, and the antenna pattern is basically similar to a monopole antenna. Using one antenna can cover 243MHz and 406MHz working frequencies, which can be used for manned spacecraft or return spacecraft beacon antennas. Finally, the antenna is made and tested with a network analyzer to verify the theoretical analysis and simulation results.