A 55GHz 5-pole NRD guide E-plane bandpass filter for millimeter wave OFDM applications

Abstract

A rectangular waveguide compatible NRD guide E-plane bandpass filter is proposed for millimeter wave OFDM applications. The NRD guide Eplane bandpass filter is constructed by inserting a metal foil array in the E-plane of NRD guide. Simulation, fabrication, and handling of the filter are not difficult because each resonator is constructed by a couple of metal foils of a simple shape. A Chebyshev response 5-pole bandpass filter with a very narrow bandwidth of 550MHz is designed and fabricated at 55GHz. Simulated and measured filter performances agree well with the design specifications. Insertion loss and temperature stability of the fabricated filter are found to be quite practical.Index Terms -bandpass filter, NRD-guide, NRD guide E-plane resonator, millimeter wave