A spaceborne Ka-band radial line slot antenna

In this paper, a large-aperture Ka-band radial line slot antenna is proposed. The Ka-band RLSA with simple structure can be easily processed. Through the optimization of the RLSA parameters, pencil beam coverage can be achieved. The gain is better than 33.5dBi, the 3-dB gain and axial ratio bandwidth is about 5%. The VSWR is better than 1.5, which is suitable for deep space exploration communication. The resulting antenna shows good performance in gain and frequency aspects through simulation.