Novel Bandpass Filter Configuration Using Coupled Linear Tapered Line Resonators

• DOI: 10.1007/s10762-004-0202-2
• Publication Date: 2004-12-27T11:20:34Z
• Authors: Zhong Yin Xiao; Zi Hua Wang
• Keywords: Return loss; Electronic filter topology; Butterworth filter

A novel tapped bandpass filter composed of two‐coupled linear tapered‐line resonators (LTLRs) is proposed. Multistepped resonators are applied to analyzing LTLRs, which are difficult to analyze directly. Through this analysis method, fundamental characteristics of LTLRs and their filter design parameters can be easily derived. This new filter has insertion loss less than 0.6dB at 1.9 GHz, the return loss less than 18dB in the range 1.8‐1.93GHz and 12.3% 3dB bandwidth. Experimental results of fabricated filter are in good agreement with the design results.