多頻段微波被動元件之分析與設計

本論文主要為分析與設計多頻段微波被動元件。其內容包括兩種雙頻段共面波導濾波器、兩種多頻段巴倫與超寬頻背覆導體共面波導帶通濾波器。首先，提出一個小型化雙頻段共面波導濾波器，使用複合式右/左手共面波導的開路與電磁能隙共面波導的短路殘段所構成。另一方面，使用週期性結構的複合式右/左手共面波導的短路殘段與四分之一波長的開路殘段，分別實現寬頻帶通濾波器與窄頻帶止濾波器。並聯連接此兩種濾波器，實現新型的雙頻共面波導濾波器。另外，提出一個三頻段巴倫建立在變壓器、多頻段諧振器與一階濾波器設計，來達到具有任意操作頻率。接著，提出由傳統馬遜巴倫的架構與多頻段諧振器，結合具有轉阻器的濾波器理論來設計另一個三頻段巴倫。最後，本文提出一具可調傳輸零點的超寬頻背覆導體共面波導帶通濾波器。此超寬頻濾波器由寬邊耦合傳輸結構與殘段諧振器組成，達到超寬頻的頻寬與傳輸零點。利用兩組槽線結構對稱排列於共面波導的地平面上，可同時產生雙頻的帶止頻率在5.2與5.8千兆赫，消除無線區域網路的信號干擾。

關鍵字

多頻段；等效電路；諧振器；濾波器；超寬頻；巴倫

並列摘要

This dissertation proposes multi-band microwave components; including two types of dual-passband coplanar waveguide (CPW) filters, two types of triple-band baluns, and ultra-wideband (UWB) conductor-backed CPW bandpass filter. First, a dual-passband CPW filter using the composite right/left-handed (CRLH) CPW open-circuited and electromagnetic bandgap (EBG) CPW short-circuited stubs is proposed. Furthermore, a wide bandpass filter and a narrow bandstop filter are consisted of periodic CRLH short-circuited stubs and quarter-wavelength open-circuited stubs, respectively. Then the novel dual-passband CPW BPF is realized by combining the wide bandpass filter with the bandstop filter in parallel. Second, a triple-band balun with arbitrary operating frequencies based on the transformer, multi-band resonator, and 1-order filter design is presented. Furthermore, the conventional Marchand balun, multi-band resonator, and filter with admittance inverters are employed to design another triple-band balun. Finally, a novel UWB bandpass filter based on a conductor-backed coplanar waveguide structure is presented, which consists of the broadside-coupled transitions and the stub resonators. To eliminate the interference of the coexisting wireless local area network within the UWB spectrum, two slot-lines are symmetrically arranged on the ground plane of UWB bandpass filter to generate the band-notched frequencies at 5.2 and 5.8 GHz simultaneously.

並列關鍵字

Multi-band ； equivalent circuit ； resonator ； filter ； ultra-wideband ； balun

參考文獻

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多頻段微波被動元件之分析與設計

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