Hybrid Reconfigurable Ladder-Type Filters with Saw and Lc Resonators

Proposed hybrid reconfigurable ladder-type filter has the ability to tune the center frequency and bandwidth of the filter independently and also has the ability to transform passband into stopband. The calculated and experimental results of different designs of the reconfigurable hybrid filter are presented. The 260-329 MHz experimental samples of reconfigurable dual-channel filter with tuning center frequency of 30%, tuning bandwidth of 100% show the insertion loss of 2 dB, stopband rejection of 15-20dB.