Abstract:

This paper presents a method of designing low loss waveguide filter for Ka band satellite communication system.After constructing simulation models based on the theory of cut-off waveguide and step impedance conversion,we get a proper result by optimization and variable sweeping in the software.The test results shows that is a high performance filter can be applied to practical engineering,the insertion loss is less than 0.4 dB in pass band (25~28 GHz),and greater than 40 dB in stop band (22~23 GHz).

Key words: Ka band;step impedance conversion;variable sweep;high pass filter