K-Band及Q-Band毫米波帶通濾波器設計

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姓名

謝育書(Yu-shu Hsieh) 查詢紙本館藏

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電機工程學系

論文名稱

K-Band及Q-Band毫米波帶通濾波器設計
(Millimeter-wave bandpass filter designs for K-band and Q-band applications)

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摘要(中)

論文摘要
本論文利用GaAs 積體電路來實現單晶片帶通濾波器，提出兩種非常適合實
現於GaAs 單晶片系統的濾波器架構。首先，本論文提出「新式步階阻抗微帶耦
合線帶通濾波器」來設計Q-Band 毫米波寬頻帶通濾波器，通帶範圍為
31.3~45GHz，在此架構中，利用步階阻抗概念實現共振器長度小於四分之一波長
的微帶耦合線帶通濾波器，其電路面積較傳統使用四分之一波長共振器設計者縮
小1/4 以上，並且利用傳輸零點使29GHz 的衰減量大於37dB，可應用於ALMA
Band-1 無線電波天文望遠鏡接收機系統，並大幅減少接收機體積與整合難度。
此外，本論文亦提出「新式電容負載髮夾型微帶耦合線帶通濾波器」來設計
K-Band FMCW 雷達系統用窄頻帶通濾波器，通帶範圍為24~26GHz，在此架構中，
利用新式電容負載髮夾型共振器為基礎所設計的帶通濾波器，其電路面積較傳統
使用二分之一波長共振器設計者縮小3/4 以上，且30dB 止帶衰減的頻率上限可
大於0 2.68fo 。而本論文也另設計一Q-Band 波導管帶通濾波器，做為單晶片帶通
濾波器的特性比較參考標準。
針對本論文提出的兩種帶通濾波器架構，我們皆先以印刷電路板設計射頻頻
段帶通濾波器來驗證所提出的設計流程與公式，並都達到良好的特性，第一種設
計透過步階阻抗共振器的特性可以將止帶頻寬拓展到7.6fo ；第二種設計透過電
容值的選擇，可以將每段耦合線長度縮小到 λ/12 以下，實做與模擬結果也都很
吻合。
在本論文中，針對各式微帶耦合線的不同特性均詳細加以研究，並討論應用
於濾波器的最佳實施方式，而針對各種設計，均有一整套簡捷明瞭的設計流程作
為設計工具，同時也為未來進一步的改良提供更多的設計彈性。

摘要(英)

Abstract
In this study, two kinds of on-chip bandpass filters are proposed and
implemented using the GaAs pHEMT process. They are very suitable for the design
of GaAs single-chip transceiver. For the Q-Band bandpass filter with wide bandwidth
from 31.3 to 45GHz, the novel planar coupled-line filters with step-impedance
resonators are proposed. The resonators can be made much smaller than conventional
quarter-wavelength resonators. Compared to the conventional parallel-coupled
bandpass filters that are based on quarter-wavelength resonators, the circuit size of
proposed filters are reduced by more than 1/4. In addition, by utilizing the inherent
transmission zeros resulted from cross-coupling, the rejection at 29GHz is better than
37 dB . The proposed Q-Band filters meet the requirements of ALMA Band-1 radio
telescope receiver, and have the advantages of reducing size, weight, and complexity
in system integration. On the other hand, for the K-Band bandpass filter with narrow
bandwidth from 24 to 26GHz, the planar hairpin-line filters with loaded capacitors are
proposed. The circuit size of this filter can be reduced by half compared to
conventional hairpin-line bandpass filters. The 30dB stopband bandwidth of
proposed K-Band filter can be extended up to 4.6fo . In addition, a WR22
waveguide-based Q-Band bandpass filter is also implemented for bench-marking.
In order to verify the effectiveness of proposed filter design equations and
procedure, two planer bandpass filters with bandwidths from 2.3~2.7GHz are also
fabricate on PCB. For the step-impedance design, the 30 dB stopband bandwidth is
up to 7.6fo . For the hairpin filter with loaded capacitor, the length of coupled-line can
be reduced to λ/12 . All the measurement results agree well with the simulation ones.
In this work, the characteristics of different kinds of coupled-line sections are
thoroughly investigated so as to make the best use of them in bandpass filter designs.
Simple and explicit design flows have also been proposed for all designs, which allow
the easy extension of proposed filter structures for further improvement in the future.

關鍵字(中)

★ 帶通濾波器
★ Q-Bnad
★ K-Band

關鍵字(英)

★ bandpass filter
★ Q-Bnad
★ K-Band

論文目次

目錄
論文摘要............................................................I
英文摘要...........................................................II
致謝...............................................................III
圖形列表...........................................................VI
表格列表...........................................................IX
第一章簡介
　　　1.1 研究動機..................................................1
1.2 文獻回顧..................................................2
1.3 章節介紹..................................................4
第二章 Q-Band 波導管帶通濾波器
　　　2.1 .電路架構................................................5
　　　2.2 .濾波器設計..............................................9
　　　2.3 .總結...................................................17
第三章 Q-Band GaAs 新式耦合線帶通濾波器
　　　3.1 .電路架構...............................................18
　　　3.2 .濾波器公式推導與設計...................................21
3.2.1 濾波器公式推導...................................21
3.2.2 低頻帶通濾波器設計...............................23
3.2.3 Q-Band GaAs帶通濾波器設計........................35
　　　3.3 .總結...................................................64
第四章 K-Band GaAs 新式髮夾型帶通濾波器
　　　4.1 .電路架構...............................................65
　　　4.2 .濾波器公式推導與設計...................................68
4.2.1 濾波器公式推導...................................68
4.2.2 低頻帶通濾波器設計...............................69
4.2.3 K-Band GaAs帶通濾波器設計........................76
　　　4.3 .總結...................................................85
第五章結論.......................................................86
參考文獻...........................................................88
附錄..............................................................91

參考文獻

參考文獻
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指導教授

林祐生(Yo-Shen Lin)

審核日期

2008-7-23

推文