以多模分支共振器為基底之新型超寬頻與多頻濾波器之研製

Study of novel ultra wideband (UWB) and multi-band filters based on multi-mode stub-loaded resonator

陳昱夫(Yu-Fu Chen)

指導教授 ： 吳宏偉

崑山科技大學/資訊科技學院/電腦與通訊研究所/碩士(2012年)

https://doi.org/10.6828/KSU.2012.00055

摘要

無資料

關鍵字

帶通濾波器 ； 超寬頻 ； 雙頻 ； 步階式阻抗共振器

並列摘要

Three types of novel bandpass filter are presented in this study. The first type is a new ultra wideband (UWB) bandpass filter (BPF) with dual-notched bands (at 5.2 / 5.7 GHz) using the stub-loaded rectangular ring multi-mode resonator (MMR). The proposed resonator consists of the dual embedded open-circuited stubs for introducing the dual notch bands and connected with a stub-loaded rectangular ring structure for controlling the two transmission zeros (at 3 / 11 GHz) at both sides of the UWB passband edge.
The second type is a new ultra wideband (UWB) bandpass filter (BPF) with a notch band at 5.8 GHz using multi-mode stub-loaded resonator (SLR) is presented. The very sharp roll-off UWB characteristics of the proposed filter can be easily obtained by using the SLR. The multi-mode stub-loaded resonator consists of two propagation paths with λ/4 open-circuited stubs for providing the two transmission zeros at lower and upper passband edge. The notch band at 5.8 GHz can be well determined by tuning the structural parameters of the asymmetric interdigital coupled input/output (I/O) lines. This study mainly provides a simple method to design the high passband selectivity UWB filter with notch band for Federal Communications Commission (FCC-defined) indoor UWB specification.
Finally, a multi-layered dual-band bandpass filter using stub-loaded stepped-impedance and uniform-impedance resonators is proposed. The filter is designed to have dual-passband at 2.4, and 5.2 GHz for Wireless Local Area Network(WLAN). The multi-layered filter consists of the stub-loaded stepped-impedance resonator (SL-SIR) on the top layer and the stub-loaded uniform-impedance resonator (SL-UIR) on the bottom layer, that can provide the multi-path propagation to enhance the filter performance and compact circuit size. The proposed SL-SIR and SL-UIR play important roles for controlling the transmission zeros at each first and second passband edges.

並列關鍵字

Bandpass filter (BPF) ； ultra wideband (UWB) ； dual-band ； stepped-impedance resonator

參考文獻

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