Design of Parallel-Coupled Microstrip Filters with a Dual-Passband Response

• Main Authors: Tsung-Hsun Yeh, 葉琮勛
• Other Authors: Jen-Tsai Kuo
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/86644908461408403515

碩士 === 國立交通大學 === 電信工程系 === 91 === Abstract Recent advances in wireless communication have created a need of high-performance filters with a dual-passband response. It is found that both the fundamental and first higher order resonant frequencies of a planar stepped-impedance resonator (SIR) can be easily adjusted by changing its structural parameters. Simultaneous synthesizing the two passbands for an SIR filter, however, is a challenge to circuit designers. In this thesis, we propose a method for designing SIR bandpass filters with a dual-passband response. The structural parameters of an SIR are determined by specified passbands. Then, in a filter, the gap and coupling length between two adjacent SIR’s are determined by the coupling coefficients specified by the design equations.