A dual-depth corrugated conical horn design

The corrugated conical horn has been developed for a long time as an excellent feed with high gain and low cross-polarization. However, as the antenna system develops in the direction of dual band or even multi-band, the feed horn also needs to work in dual-band or multi-band at the same time as well. This paper starts with the design idea of ordinary corrugated conical horn, uses a simple parametric modeling design method to improve the design, and extends it to the design of dual depth corrugated conical horn. Finally, a 23.8GHz/31.4GHz dual-depth corrugated conical horn is designed, which can achieve VSWR less than 1.1 and cross-polarization peak below -20dB in 22.6GHz~25GHz and 30.2GHz~32.6GHz two discrete frequency bands. -12dB beam width is below about 25 degrees, so it can be used as an excellent far-field irradiation feed for the optimal design of quasi-optical optical path.