A novel waveguide E-plane filter with metal cut and loaded cavity
In this paper, a novel four-section waveguide E-plane bandpass filter with two pieces of metal cut at both sides is presented. In this filter, in order to improve the performance of the band rejection, loaded cavity is designed instead of air cavity. The insertion loss is less than 1.5 dB in the passband from 91.4 to 94.9 GHz. The lower rejection is larger than 40 dB from 75 to 87.6 GHz, while the upper rejection is larger than 40 dB in the range 103-110 GHz.