Design of integrated millimetre wave microstrip interdigital bandpass filters on CMOS technology

Abstract

With communication systems designed for operation in the millimeter wave frequencies it is now possible to have most of the transceiver implemented on a single CMOS die. An important system component that is required to ensure regulatory compliance is the RF bandpass filter. Unfortunately to date RF bandpass filters have been difficult to integrate on CMOS because of filter size and undesirable performance due to the conductive substrate. In this paper a six step method for the design of integrated interdigital bandpass filters on CMOS is presented. The utility of the method outlined in the paper is demonstrated for an on-chip integrated mm-wave interdigital bandpass filter designed and fabr..