應用CSRR FMMR結構與指叉耦合器設計具帶拒特性之超寬頻帶通濾波器

Notched-band Ultra Wideband Bandpass Filter Design Using CSRR FMMR and Inter-digital Couples

徐敬淳(Jing-Chung Xu)

指導教授 ： 劉智群

健行科技大學/電資學院/電機工程所/碩士(2013年)

摘要

本論文設計五個超寬頻濾波器，有互補開槽摺疊多模濾波器(CSRR FMMR)、反向互補開槽濾波器(Invert CSRR)、帶殘支指叉饋路濾波器(Stubbed Inter-digital Couples)、地層挖槽濾波器(DGS)、以及地層挖槽與指叉饋路濾波器(DGS and Inter-digital Couples)等。主要是透過修改諧振器、饋路、地層結構達到寬頻與微型化，在過程中探討電流分佈與頻率響應之關係並分析濾波器之特性。設計完成之濾波器具有單帶拒、雙帶拒與三帶拒等特性可以應用於超寬頻(‎Ultra-wideband)系統中。

設計之DGS and Inter-digital Couples的頻率響應：中心頻率(5.60GHz)、低介入損耗(-0.26dB)、-3dB頻寬(6971MHz)、比例頻寬(126%)。濾波器頻率滿足超寬頻通訊系統所需且具有三個可調整帶拒響應(4.8~5.3 / 5.8~6.5 / 7.6~8.5 GHz)，可以避免無線網路與衛星通訊信號干擾超寬頻系統。

關鍵字

超寬頻 ； 濾波器 ； 互補開槽摺疊多模 ； 指叉饋路 ； 地層挖槽

並列摘要

In this thesis, five Ultra-wideband filters included CSRR FMMR filter、Invert CSRR filter、Stubbed Inter-digital Couples filter、DGS filter and DGS and Inter-digital Couples filter are designed. In addition, size reduction and wider bandwidth are achieved by improving the resonators, feed line, inter digital couples and DGS structure. The Ultra-wideband filter with band-notched, dual band-notched and triple band-notched response in the pass-band are presented. The current distribution and frequency response are to analyze the characteristics of the filters, which can be applied to the Ultra-wideband systems.

The response of DGS and Inter-digital Couples filter are with center frequency of 5.60 GHz, low insertion Loss (-0.26dB), -3dB bandwidth of 6971MHz, and fractional bandwidth of 126%. The filters can be applied to the microwave UWB systems with the ability of blocking the interference signals, such as Wi-Fi and satellite communication signals.

並列關鍵字

Ultra-wideband ； filter ； CSRR FMMR ； Inter-digital Couples ； DGS.

參考文獻

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