论文信息 - A Dual-Band Combline Bandpass Filter Loaded by Lumped Series Resonators

A Dual-Band Combline Bandpass Filter Loaded by Lumped Series Resonators

This letter presents a dual-band combline bandpass filter (BPF) loaded by lumped series resonators. The proposed filter configuration can easily generate two desired passbands by controlling the resonant frequencies of the comblines as well as the series resonators. Furthermore, the skirt frequency characteristics between the two passbands are improved by transmission zeros introduced by source-load coupling via a lumped element capacitor. Two-pole dual-BPF with center frequencies of 1.2 and 1.54 GHz is designed and the measured results agree well with simulated results.

[1] Chi-Yang Chang,et al. Realization of transmission zeros in combline filters using an auxiliary inductively coupled ground plane , 2003 .

[2] Chu-Yu Chen,et al. A simple and effective method for microstrip dual-band filters design , 2006, IEEE Microwave and Wireless Components Letters.

[3] Lin-Chuan Tsai,et al. Dual-band bandpass filters using equal-length coupled-serial-shunted lines and Z-transform technique , 2004, IEEE Transactions on Microwave Theory and Techniques.

[4] Xiaohong Tang,et al. Compact Dual Band Bandpass Filter Using Novel E-Type Resonators With Controllable Bandwidths , 2008, IEEE Microwave and Wireless Components Letters.

[5] Yeong-Her Wang,et al. A novel compact ring dual-mode filter with adjustable second-passband for dual-band applications , 2006 .

[6] Xiu Yin Zhang,et al. Dual-Band Bandpass Filters Using Stub-Loaded Resonators , 2007, IEEE Microwave and Wireless Components Letters.

[7] C. Hsue,et al. Dual-band bandpass filters using equal-length coupled-serial-shunted lines and Z-transform technique , 2004 .