Design of Square-loop Dual-mode Band-pass Filters Using Perturbation with Hilbert Curve

• Main Authors: Jun-Mao Chang, 張俊貿
• Other Authors: Po-Chiang Lu
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/77034605461857502351

碩士 === 清雲科技大學 === 電機工程研究所 === 95 === Perturbation applied with Hilbert fractal configuration for dual-mode square-loop resonator (DMSLR-H) is introduced to design wide-band band-pass filter in this paper. Using iterative Hilbert perturbation and space-filling technique is proposed to form the dual-mode characteristics as well as to enhance the frequency response of conventional DMSLR. For analysis, results including surface current distributions and frequency responses are presented and discussed. The cascaded DMSLR-H with lower insertion loss (0.55 dB) and high out-of-band rejection level (-28.8 dB) and wide band (BW 26.14 %) is obtained. The modified cascaded DMSLR-H exhibits a good performance with low insertion loss (0.7 dB), high out-of-band rejection level (-27.45 dB) and wider band (BW 31.5 %) filters.