WANG Zhongbao, FANG Shaojun. Synthesis of Dual-Band Bandpass Filters with Asymmetric Stepped-Impedance CBACPW Resonators[J]. Chinese Journal of Electronics, 2013, 22(4): 861-864.
Citation: WANG Zhongbao, FANG Shaojun. Synthesis of Dual-Band Bandpass Filters with Asymmetric Stepped-Impedance CBACPW Resonators[J]. Chinese Journal of Electronics, 2013, 22(4): 861-864.

Synthesis of Dual-Band Bandpass Filters with Asymmetric Stepped-Impedance CBACPW Resonators

Funds:  This work is supported by National Natural Science Foundation of China (No.61071044), Traffic Applied Basic Research Project of the Ministry of Transport of China (No.2010-329-225-030), Fundamental Research Funds for the Central Universities (No.3132013053 and No.2012TD007) and National Key Technologies R&D Program of China (No.2012BAH36B01).
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  • Corresponding author: WANG Zhongbao, FANG Shaojun
  • Received Date: 2012-11-01
  • Rev Recd Date: 2013-05-01
  • Publish Date: 2013-09-25
  • A novel Dual-band bandpass filter (DBBPF) with an asymmetric topology and steppedimpedance Conductor-backed asymmetric coplanar waveguide (CBACPW) resonators is proposed in this paper. Compared with the existing DBBPFs with a same low-pass prototype, two additional transmission zeros are emerged by using the asymmetric topology. To facilitate the filter synthesis, design formulas of the filter are derived, and an ANN-based synthesis model of CBACPWs is developed. To validate the filter synthesis method, a DBBPF operating at GSM and GPS bands is designed, simulated and measured. A good agreement between simulation and measurement is obtained.
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