Design of the Compact Band-Pass Filter Utilizing Dielectric Loaded

A design of a compact Ku-band four pole band-pass filter is reported. The filter is based on twodual-mode dielectric loaded waveguide (WG) resonators providing a significant reduction of the sizesas compared to its single mode counterpart. Each resonator is comprised of a square shaped cut-offwaveguide loaded with a silica glass plate. The filter is realized using a quadruplet cell, which allowstwo symmetric transmission poles to be placed at an arbitrary distance from the pass-band edges. Thisis a welcome feature making this filter useful for both Tx and Rx duplexer channels. A number ofnumerical issues are addressed concerning the modelling using High Frequency Structure Simulator(HFSS). Experimental results are compared with the simulations validating the design approach