A Novel Lowpass Filter Using Three Corner-Cutting T-Shaped Compact Microstrip Resonator Cells

A compact and novel lowpass filter using three-order corner-cutting TCMRC (T-shaped compact microstrip resonator cells) is presented. Such a structure decreases the unnecessary coupling between the microstrip transmission lines and presents a good impedance matching and less spurious responses. Based on this theory, the proposed filter has been designed, fabricated and measured. From the measurements, good agreements with the simulated results are obtained.