臺灣博碩士論文加值系統

一般的單旁波帶混波器，藉由使用各一個射頻與中頻耦合器或一個中頻耦合器與一個90度相移的本地振盪訊號所構成的兩個雙平衡式混波器，來達成旁波帶拒斥與本地振盪至射頻端的隔離度。
本論文主要提出一個新的單旁波帶混波器架構，採用次諧波混波器架構，而且使用一個雙頻帶耦合器分別設計於射頻與中頻兩個頻帶，以減少電路面積。本論文也提出使用集總元件與分佈式集總元件的兩種雙頻帶耦合器設計方法。新的單旁波帶混波器架構包含2個反並聯式二極體對。為了驗證所提的單旁波帶混波器設計方法，研製單旁波帶混波器於一般的PCB上。量測結果顯示轉換損耗約15dB，旁波帶抑制約26dB，載波抑制約30dB。
其二，提出一種新型耦合線耦合器，採用平行微帶耦合線，在其上覆蓋上浮接金屬板，用來增強耦合量。在此架構中，可以不需要鎊線及高解析度之製程，即可以達到3dB 之耦合量。而且此架構可以與微帶波導架構(microwave guiding structure)相容。為了驗證所提的耦合器設計方法，研製鏡頻拒斥混波器於PCB上，量測結果顯示轉換損耗約18dB，鏡頻拒斥值約20dB。

In the conventional designs of SSM, the side-band rejection and the LO-to-RF isolation have to be achieved by using two double-balance mixers in conjunction with either RF and IF couplers or an IF coupler and a quadrature-phase LO pumping signals.
This thesis presents a novel single sideband mixer (SSM) feature with subharmonic mixer and a dual-band quadrature coupler, which is designed to operated at RF and IF bands, respectively, is proposed for minimizing the size of circuit. Two design approaches of constructing the dual-band couplers with the lumped-element and distributed-lumped elements are proposed. This novel feature of SSM is consisted of two anti-parallel diode. For verification of the proposed SSM design method, two experimental circuits were designed and fabricated on the conventional PCB. The measured results are the conversion loss of 15 dB, sideband suppression of 26dB, and carrier suppression of 30dB.
Second, presents a new structure of tightly coupled directional coupler fabricated on PCB substrate. The proposed structure is realized by placing a floating metal plate overlaid on the parallel-coupled microstrip lines to enhance the coupling between two lines. Such a structure can realize a 3dB directional coupler without using wire-bonding and very high resolution fabrication processes. For verification of the proposed coupler design method , one experimental circuits were designed and fabricated on the conventional PCB. The measured results are the conversion loss of 18 dB, image rejection ratio of 20dB.

目 錄


指導教授推薦書………………………………………………………….i
口試委員會審定書………………………………………………………ii
授權書…………………………………………………………………...iii
中文摘要…………………………………………………………………v
英文摘要………………………………………………………………...vi
誌謝……………………………………………………………………viii
目錄……………………………………………………………………..ix圖表目錄………………………………………………………………..xii
第一章 簡介……………………………………………………………1
1.1研究動機………………………………………………………1
1.2章節概述………………………………………………………1
第二章 混波器基本原理……………………………………………3
2.1鏡頻拒斥與單旁波帶混波器基本原理及架構………………3
2.1.1鏡頻拒斥混波器基本動作原理…………………………4
2.1.2單旁波帶混波器基本動作原理…………………………6
2.2 反並聯式二極體工作原理……………………………………8
2.3混波器的主要特性…………………………………………9
第三章 集總元件式耦合器…………………………………………….12
3.1等效集總網路分析…………………………………………12
3.2寬頻二階集總元件式耦合器………………………………18
3.3雙頻帶二階集總元件式耦合器……………………………24
第四章 使用集總元件式雙頻帶耦合器設計單旁波帶混波器………38
4.1混波器架構的動作原理分析………………………………38
4.2集總元件式雙頻帶耦合器電路設計………………………39
4.3單旁波帶混波器……………………………………………45
4.3.1電路設計………………………………………………45
4.3.2特性量測與討論……………………………………46
第五章 使用集總元件與分佈式元件的雙頻帶耦合器設計單旁波
帶混波器………………………………………………………53
5.1使用分佈式元件與集總元件的雙頻帶耦合器電路設計…53
5.2功率分割器電路設計……....……………………………...60
5.3單旁波帶混頻器……………………………………………62
5.3.1電路設計………………………………………………62
5.3.2特性量測與討論………………………………………63
第六章 使用新型微帶線耦合器設計鏡頻拒斥混波器………………70
6.1混波器架構的選擇與動作原理分析………………………70
6.2集總元件式耦合器電路設計………………………………71
6.2.1中頻耦合器…………………………………………71
6.2.2射頻耦合器…………………………………………74
6.2.2.1新型耦合器奇偶模分析...........................................74
6.2.2.2射頻耦合器之製作...................................................78
6.3鏡頻拒斥混波器……………………………………………80
6.3.1電路設計………………………………………………80
6.3.2特性量測與討論……………………………………82
第七章 結論與建議…………………………………………………90
參考文獻………………………………………………………………91

[1]S. A. Maas “Microwave Mixers”, Artech House, Norwood, MA, 1993.
[2]J. M. Mourant, & S. Jurgiel, “A Broadband Planar Image Reject Mixer”, IEEE MTT-S Digest, vol.3, pp.1637 –1640, May 1994.
[3]Chen-Yu Chi, and Gabriel M. Rebeiz, “Design of Lange-Couplers and Single-Sideband Mixers Using Micromachining Techniques”, IEEE Transactions on Microwave Theory and Techniques, vol. 45, no. 2, pp.291 -294,February 1997.
[4]H. I. Fujishiro, Y. Ogawa, T. Hamada ,and T. Kimura, “SSB MMIC mixer with subharmonic LO and CPW circuits for 38GHz band applications”, IEEE Electronic Letters, vol. 37, no. 7, pp.435 -436, March 2001.
[5]Gary K. Lewis, Inder J. Bahl, and Arthur E. Geissberger, “GaAs MMIC Slotline/CPW Quadrature IF Upconverter”, IEEE Microwave and Millimeter-Wave Monolithic Circuits Symposium, pp.51 -54 ,May 1988.
[6]Samuel J. Parisi “ Lumped Element Hybrid”,IEEE MTT-S Digest, vol. 3, pp. 1243 –1246, June 1989.
[7]Ramesh K. and William J. Getsinger “Quasi-Lumped-Element 3- and 4-Port Networks For MIC and MMIC Applications”, IEEE MTT-S Digest, vol. 84, no. 1, pp. 409-411, May 1984.
[8]R.W. Vogel, “Analysis and design of Lumped- and Lumped- Distributed-Element Directional Couplers for MIC and MMIC applications”, IEEE Transaction on Microwave Theory and Techniques, Vol. 40, No. 2, pp. 253-262, Feb. 1992.
[9]D. M. Pozar, “Microwave Engineering”, Second Edition John Wiley & Sons, Inc. 1998
[10]Wei-Shin Tung, Hsu-Hsiang Wu, and Yi-Chyun Chiang, “Design of Microwave Wide-Band Quadrature Hybrid Using Planar Transformer Coupling Method” IEEE Transaction on Microwave Theory and Techniques, Vol. 51, No. 7, pp. 1852-1856, July. 2003.
[11]Fai-Leung Wong, and Kwok-Keung M Cheng, “A Novel Planar Branch-Line Coupler Design For Dual-Band Applications” IEEE MTT-S Digest, Vol. 2, No. 2, pp. 903-906, June 2004.
[12]Kwok-Keung M. Cheng,and Fai-Leung Wong, “A Novel Approach to the Design and Implementation of Dual-Band Compact Plannar Branch-Line Coupler” IEEE Transaction on Microwave Theory and Techniques, Vol. 52, No. 11, pp. 2458-2463, Nov. 2004.
[13]Ben R. Hallford and Senior Member, “Investigation of a Single-Sideband Mixer Anomaly” IEEE Transaction on Microwave Theory and Techniques, Vol. 31, No. 12, pp. 1030-1038, Dec. 1983.
[14]A.H Baree ,I.D Robertson and J.S Bharj, “MMIC SSB Frequency Translators with Image-Rejection for Satellite Transponder Applications” IEEE MTT-S Digest, vol. 2, pp. 869-872, May 1995.
[15]Jui-Chieh Chiu, Chih-Ming Lin and Yeong-Her Wang, “A 3dB Quadrature Coupler Suitable for PCB Circuit Design” IEEE MTT-S Digest

[16]R. Mongia, I. Bahl and P. Bhartia, RF and Microwave Coupled-Line Circuits, Artech House, 1999
[17]J. Lange, “Interdigitated stripline quadrature hybrid,” IEEE Trans. Microwave Theory Techn, pp. 1150-1151., Dec. 1969.
[18]J-H Cho, H-Y. Hwang and S-W. Yun, “A design of wideband 3-dB coupler with N-section microstrip tandem structure,” IEEE Microwave and Wireless Components Letters, vol. 15, pp. 113-115, Feb. 2005.
[19]S. M. Perlow and A. Presser, “The interdigitated three-strip coupler,” IEEE Trans. Microwave Theory and Tech., vol. MTT-32, pp. 1418 – 1422, Oct 1984.
[20]J.A. Garcia, “A wide-band quadrature hybrid coupler,” IEEE Trans. On Microwave Theory Techn., pp. 660-661, July 1971.
[21]E. G. Cristal, "Coupled-transmission-line directional couplers with coupled lines of unequaI characteristic impedances,” IEEE Trans. Microwave Theory Tech., vol. MTT-4, pp. 337–346, July 1966.
[22]D. P. Andrews and C. S. Aitchison, ” Wide-band lumped-element quadrature 3-dB couplers in microstrip,” IEEE Trans. Microwave Theory and Tech., vol. MTT-48 pp. 2424 - 2431, Dec. 2000.
[23]B. Sheleg and B Spielman,” Broad-Band Directional Coupler Using with Dielectric Overlays,” IEEE Trans. Microwave Theory and Tech., vol. MTT-22, No. 12, pp. 1216 - 1221, Dec. 1974.
[24]R. Garg, I. J. Bahl, ”Characteristics of coupled microstriplines,” IEEE Trans. Microwave Theory and Tech., vol. MTT-27, No. 7, pp. 700 - 705, July 1979.
[25]蘇惟冠, “高頻集總元件耦合器及相關電路考量寄生效應設計方法之研究”, 長庚大學,碩士論文,1999.
[26]蘇文林,“微型化低功率鏡頻拒斥混波器設計方法之研究”, 長庚大學,碩士論文,2000.
[27]雷宏裕,“使用雙頻帶微波耦合器設計高性能單旁波帶混頻器之研究” , 長庚大學,碩士論文,2005.