A Coupled Line Type Waveguide Bandpass Filter

In this paper, a coupled line type waveguide bandpass filter is newly proposed. The proposed bandpass filter configuration consists of magnetically coupled waveguide cavities. In order to show the background of the proposed waveguide bandpass filter, the general coupled line TEM bandpass filter theory, which means the coupled line filter with arbitrary coupled line length and impedance level, will be briefly introduced. Measured result of an implemented coupled line type waveguide filter is presented.