COMPACT DUAL-PASSBAND FILTER USING SPIRAL RESONATORS

Kaijun Song, Yuxia Mo, Yunqiang Xia, Shunyong Hu, Yong Fan
2012 Progress In Electromagnetics Research Letters  
A novel compact dual-band bandpass filter using spiral resonators and input/output (source-load) direct coupling structure has been presented. Two different transmission paths are utilized to realize independently controllable central frequencies and bandwidths for each passband. In addition, three transmission zeros has been introduced to improve the frequency selectivity. A dual-passband filter centered at 2.41 GHz and 4.22 GHz is designed, simulated, and fabricated to demonstrate the
more » ... nstrate the performance of the proposed filter structure. The measured results show good agreement with the simulated ones.
doi:10.2528/pierl12081803 fatcat:i6qoubgtwrhrnjoljla25lx2yu