Compact transmitting dielectric resonator filter using capacitive loaded dual mode method for PCS microcellular base station

This paper describes a compact transmitting bandpass filter using dielectric resonators for PCS microcellular base station. We propose new size reduced capacitive loaded TM dual mode resonators that consist of monoblock high K ceramics. The electrical performance of the filter constructed by these resonators is designed by using dual mode dielectric transmission line method. A six pole bandpass filter at 1.9 GHz band is manufactured. It has center frequency of 1.87 GHz, low insertion loss of 1.1 dB and small dimensions of 20/spl times/20/spl times/60 mm.