Wideband single-ridge waveguide-coaxial converter design

In order to meet the conversion requirements between various types of transmission lines in microwave systems, an ultra-broadband single-ridge waveguide-coaxial converter spanning X and Ku bands is designed in this paper by using a single-ridge waveguide plus a stepped impedance converter. The operating bandwidth is 7.31Ghz-15GHz, and the return loss is better than -20dB. The design uses coaxial probe back-feeding, which is conducive to the cascading of the system, and also sets the tuning screw to facilitate the subsequent adjustment. The design provides a new idea for an ultra-broadband waveguide coaxial line converter across frequency bands.