Miniature Parallel-Coupled Bandpass Filters
碩士 === 國立臺灣大學 === 電信工程學研究所 === 94 === Compact parallel-coupled bandpass filters with good selectivity and better stopband rejection are proposed in this study. They are designed with quarter-wavelength resonators such that there is no repeated passband at twice the center frequency, and the lengths...
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ndltd-TW-094NTU054350802015-12-16T04:38:37Z http://ndltd.ncl.edu.tw/handle/35577123696502058433 Miniature Parallel-Coupled Bandpass Filters 小型化耦合線帶通濾波器 Chien-Chun Cheng 鄭建群 碩士 國立臺灣大學 電信工程學研究所 94 Compact parallel-coupled bandpass filters with good selectivity and better stopband rejection are proposed in this study. They are designed with quarter-wavelength resonators such that there is no repeated passband at twice the center frequency, and the lengths of coupled-line sections can be reduced by using additional capacitors or inductors. In addition, by introducing the capacitive or inductive cross-coupling effect, transmission zeros can be achieved to improve the selectivity. The open stub which works as a K-inverter can also introduce a transmission zero at high frequency so as to suppress the spurious passband. Suitable equivalent models and design formulas are establish, from which the proposed filter can be design and investigate. Finally, compact 4th and 6th order bandpass filters with better selectivity and wider stopband up to four times the center frequency are accomplished. Comparing to the conventional parallel-coupled bandpass filter, the size reduction is over 60%. Yo-Shen Lin 林祐生 2006 學位論文 ; thesis 71 zh-TW |
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碩士 === 國立臺灣大學 === 電信工程學研究所 === 94 === Compact parallel-coupled bandpass filters with good selectivity and better stopband rejection are proposed in this study. They are designed with quarter-wavelength resonators such that there is no repeated passband at twice the center frequency, and the lengths of coupled-line sections can be reduced by using additional capacitors or inductors. In addition, by introducing the capacitive or inductive cross-coupling effect, transmission zeros can be achieved to improve the selectivity. The open stub which works as a K-inverter can also introduce a transmission zero at high frequency so as to suppress the spurious passband. Suitable equivalent models and design formulas are establish, from which the proposed filter can be design and investigate. Finally, compact 4th and 6th order bandpass filters with better selectivity and wider stopband up to four times the center frequency are accomplished. Comparing to the conventional parallel-coupled bandpass filter, the size reduction is over 60%.
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Yo-Shen Lin |
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Yo-Shen Lin Chien-Chun Cheng 鄭建群 |
author |
Chien-Chun Cheng 鄭建群 |
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Chien-Chun Cheng 鄭建群 Miniature Parallel-Coupled Bandpass Filters |
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Chien-Chun Cheng |
title |
Miniature Parallel-Coupled Bandpass Filters |
title_short |
Miniature Parallel-Coupled Bandpass Filters |
title_full |
Miniature Parallel-Coupled Bandpass Filters |
title_fullStr |
Miniature Parallel-Coupled Bandpass Filters |
title_full_unstemmed |
Miniature Parallel-Coupled Bandpass Filters |
title_sort |
miniature parallel-coupled bandpass filters |
publishDate |
2006 |
url |
http://ndltd.ncl.edu.tw/handle/35577123696502058433 |
work_keys_str_mv |
AT chienchuncheng miniatureparallelcoupledbandpassfilters AT zhèngjiànqún miniatureparallelcoupledbandpassfilters AT chienchuncheng xiǎoxínghuàǒuhéxiàndàitōnglǜbōqì AT zhèngjiànqún xiǎoxínghuàǒuhéxiàndàitōnglǜbōqì |
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1718150496294797312 |