| Summary: | 碩士 === 健行科技大學 === 電機工程所 === 102 === 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.
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