標題: Analytical Design of Microstrip Short-Circuit Terminated Stepped-Impedance Resonator Dual-Band Filters
作者: Chang, Wei-Shin
Chang, Chi-Yang
電信工程研究所
Institute of Communications Engineering
關鍵字: Bandpass filter (BPF);dual band;microstrip;stepped-impedance resonator (SIR)
公開日期: 1-Jul-2011
摘要: This paper proposes an analytical method to design a dual-band filter using the short-circuit terminated half-wavelength stepped-impedance resonator (SIR). The SIR has an advantage to easily control the first and second resonances by adjusting its structural parameters. In the proposed method, the structural parameters of the SIR are obtained analytically according to the two passband center frequencies and bandwidths of the filter. As a result, the achievable specifications of the dual-band filter can be rapidly determined. The coupling between adjacent SIRs is realized by a short-circuited stub, which is characterized as a K-inverter network. The dual-frequency transformer incorporated with the tapped-line input/output structure is used for the external coupling. Applying the analytical equations in the design process, a dual-band filter can be easily and quickly realized. More importantly, compared to the published dual-band filters, the proposed method is easier to design, especially for a relatively high-order dual-band filter. Two fourth-order and one sixth-order dual-band filters are designed and fabricated to demonstrate the proposed method.
URI: http://dx.doi.org/10.1109/TMTT.2011.2132140
http://hdl.handle.net/11536/21822
ISSN: 0018-9480
DOI: 10.1109/TMTT.2011.2132140
期刊: IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume: 59
Issue: 7
起始頁: 1730
結束頁: 1739
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