標題: | Design of microstrip bandpass filters with a dual-passband response |
作者: | Kuo, JT Yeh, TH Yeh, CC 電信工程研究所 Institute of Communications Engineering |
關鍵字: | dual-passband;microstrip circuit;planar microwave filters;stepped impedance resonator (SIR) |
公開日期: | 1-四月-2005 |
摘要: | This paper presents a rigorous design of microstrip bandpass filters with a dual-passband response in parallel-coupled and vertical-stacked configurations. Based on resonance characteristics of a stepped impedance resonator (SIR), the second resonant frequency can be tuned over a wide range by adjusting its structure parameters. Emphasis is placed on filter synthesis for simultaneously matching in-band response and singly loaded Q by using tapped input/output couplings for the two designated passbands. Fractional bandwidth design graphs are used to determine proper geometric parameters of each coupled stage when filter specification is given. Realizable fractional bandwidths of the two passbands for a coupled SIR structure are clearly depicted in fractional bandwidth design graphs. Several experimental litters are fabricated and measured to demonstrate the design. |
URI: | http://dx.doi.org/10.1109/TMTT.2005.845765 http://hdl.handle.net/11536/13833 |
ISSN: | 0018-9480 |
DOI: | 10.1109/TMTT.2005.845765 |
期刊: | IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES |
Volume: | 53 |
Issue: | 4 |
起始頁: | 1331 |
結束頁: | 1337 |
顯示於類別: | 期刊論文 |