Broadband Microwave Coupler and Filter
碩士 === 國立交通大學 === 電信工程系所 === 94 === The thesis includes the two kinds of microwave circuits, namely the miniaturized ultra-broadband quadrature hybrid coupler and the multilayer wideband bandpass filter. We adopt a 5-section symmetrical cascaded coplanar waveguide (CPW) structure to realize the ul...
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ndltd-TW-094NCTU54350492016-05-27T04:18:34Z http://ndltd.ncl.edu.tw/handle/26091126519887169029 Broadband Microwave Coupler and Filter 寬頻微波耦合器與濾波器 Yong-Shun Chen 陳永順 碩士 國立交通大學 電信工程系所 94 The thesis includes the two kinds of microwave circuits, namely the miniaturized ultra-broadband quadrature hybrid coupler and the multilayer wideband bandpass filter. We adopt a 5-section symmetrical cascaded coplanar waveguide (CPW) structure to realize the ultra-broadband (2-18GHz) quadrature hybrid coupler. In the tightest center coupling section, we propose the vertically installed planar (VIP) structure to achieve it and also compensate the unequal odd- and even-mode phase velocities. The fabricated circuit size miniaturized by high dielectric substrate (er=9.8) is 16.8 mm×6 mm. Then, a wideband (2-4GHz) bandpass filter is designed by using parallel coupled line stepped impedance resonators (SIR). The properties of SIR can reduce the resonant length and suppress the upper stopband interference. Furthermore, we propose multilayer structure to obtain the tight-coupling. Finally, a wideband filter with center frequency at 3 GHz, 66.67% fractional bandwidth, and high stopband rejection is presented. Chi-Yang Chang 張志揚 2006 學位論文 ; thesis 47 en_US |
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碩士 === 國立交通大學 === 電信工程系所 === 94 === The thesis includes the two kinds of microwave circuits, namely the miniaturized ultra-broadband quadrature hybrid coupler and the multilayer wideband bandpass filter.
We adopt a 5-section symmetrical cascaded coplanar waveguide (CPW) structure to realize the ultra-broadband (2-18GHz) quadrature hybrid coupler. In the tightest center coupling section, we propose the vertically installed planar (VIP) structure to achieve it and also compensate the unequal odd- and even-mode phase velocities. The fabricated circuit size miniaturized by high dielectric substrate (er=9.8) is 16.8 mm×6 mm.
Then, a wideband (2-4GHz) bandpass filter is designed by using parallel coupled line stepped impedance resonators (SIR). The properties of SIR can reduce the resonant length and suppress the upper stopband interference. Furthermore, we propose multilayer structure to obtain the tight-coupling. Finally, a wideband filter with center frequency at 3 GHz, 66.67% fractional bandwidth, and high stopband rejection is presented.
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Chi-Yang Chang |
author_facet |
Chi-Yang Chang Yong-Shun Chen 陳永順 |
author |
Yong-Shun Chen 陳永順 |
spellingShingle |
Yong-Shun Chen 陳永順 Broadband Microwave Coupler and Filter |
author_sort |
Yong-Shun Chen |
title |
Broadband Microwave Coupler and Filter |
title_short |
Broadband Microwave Coupler and Filter |
title_full |
Broadband Microwave Coupler and Filter |
title_fullStr |
Broadband Microwave Coupler and Filter |
title_full_unstemmed |
Broadband Microwave Coupler and Filter |
title_sort |
broadband microwave coupler and filter |
publishDate |
2006 |
url |
http://ndltd.ncl.edu.tw/handle/26091126519887169029 |
work_keys_str_mv |
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