Dielectric filters for short millimetre wave integrated circuits

Abstract

Characteristics are presented for narrow. band pass (∼3%) filters designed with temperature compensated high permittivity dielectrics (barium nonatitanate). At W band both duroid and Z cut quartz microstrip substrates have been investigated and the insertion losses due to the various coupling fields are estimated to be ∼ 2 dB for 2 resonator filters and ∼ 3.5 dB for 3 resonator filters.