COPLANAR WAVE-GUIDE ACTIVE BANDPASS FILTER

A novel microwave active bandpass filter has been designed in coplanar waveguide. The approach uses a GaAs FET to link two end-coupled reson ators. The realised active filter not only compensates for the losses as compared to a passive filter but also provides an overall gain of 1 7.54 dB. Flexibility in tuning the filter response through the bias vo ltage and its superior performance at the harmonics over the passive f ilters are among the advantages of the design.