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研究生:江泳翰
研究生(外文):YONG-HAN JIANG
論文名稱:非四分之一波長枝幹耦合器之設計
論文名稱(外文):Non-Quarter Wavelength Branch Line Coupler Design
指導教授:曾振東曾振東引用關係
指導教授(外文):JAN-DONG TSENG
學位類別:碩士
校院名稱:國立勤益科技大學
系所名稱:電子工程系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2018
畢業學年度:106
語文別:中文
論文頁數:39
中文關鍵詞:枝幹耦合器任意電氣長度PI型等效
外文關鍵詞:branch line couplerarbitrary wavelengthPI type equivalent
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一般的枝幹耦合器是兩個對稱面傳輸線組成的四埠被動電路,傳輸線阻抗根據設計的輸出功率比有不同的值,傳輸線的電氣長度則固定四分之一波長,在實作上能變動的參數受到侷限。本文以傳輸線電氣長度的改變為主旨,首先在不更改枝幹耦合器結構下,改變電氣長度從零到二分之一波長,並運用傳輸線π型等效,再將相鄰並聯電容抵銷,使電路無需外加電容。延續上述做法後,將兩傳輸線段替換成電感器。最後是加上開路或短路殘段,以電抗值自由調整的方式,使電路設計更有彈性。
所有電路皆由電磁模擬軟體證實理論,並以FR-4板進行製作,在工作頻率點模擬數據與實測結果相符,證明其可行性,可應用於一般枝幹耦合器,使設計枝幹耦合器有更多彈性及選項。
Conventional branch line coupler is a four ports passive circuit consistsing of two part of parallel transmission lines. Normally, the electrical length of transmission lines is set to quarter wavelength. This restricts the circuit design freedom and layout size.
In this thesis, we propose three directions to design non-quarter wavelength branch line coupler. First, we use PI type equivalent circuit on the transmission lines used in conventional branch line coupler. By eliminating the adjacent capacitances at the joints, we can change the electrical length of transmission lines with no susceptance adding. Second, as the method described above, replace two transmission lines as inductors. Last, add open/short stubs to the joints. By adjusting reactance value, we can design the branch line coupler more flexible and freely.
All circuits designed by the above mentioned method were fabricated on FR4 substrate and measured by vector network analyzer. The measured and simulated results are in good agreement at the design frequency and these results demonstrate the validity of the approach.
中文摘要 I
Abstract II
致 謝 III
目錄 IV
圖目錄 V
第一章 緒論 1
1.1前言 1
1.2 章節概要 1
第二章 枝幹耦合器簡介 3
2.1枝幹耦合器簡介 3
2.2傳統枝幹耦合器分析 4
第三章 非四分之一波長之枝幹耦合器 9
3.1 非四分之一波長之枝幹耦合器 9
3.2 非四分之一波長之混合式枝幹耦合器 21
3.3 以電抗設計非四分之一波長之枝幹耦合器 27
第四章 結論 37
參考資料 38
[1] Qiang Xu, Mathew Biedka and Yuanxun Ethan Wang, “Indented Antenna Arrays for High Isolation: The Growing Interest in Simultaneous-Transmit-and-Receive-Based Full-Duplex Communication Systems,” IEEE Antennas and Propagation Magazine, vol. 60, no. 1, pp. 72-80, Feb. 2018.
[2] Ching-Wen Tang, Chien-Tai Tseng and Ko-Cheng Hsu, “Design of Wide Passband Microstrip Branch-Line Couplers With Multiple Sections,” IEEE Transactions on Components, Packaging and Manufacturing Technology, vol. 4, no. 7, pp. 1222-1227, July 2014.
[3] J. Reed and G. J. Wheeler, “A Method of Analysis of Symmetrical Four-Port Networks,” IRE Trans. Microwave Theory and Techniques, vol. 4, no. 4, pp. 246-252, Oct. 1956.
[4] Chien-Chun Ku, Chung-I G. Hsu, Chia-Hung Chou and Jan-Dong Tseng, “An adjustable output power ratio general type branch line coupler,” RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO), 2015 IEEE MTT-S 2015 International Microwave Workshop Series on, pp. 188-190, Sep. 2015.
[5] Lin-Zong Zheng, Jan-Dong Tseng, Bing-shu Wu and Jhih-Min Li, “Hybrid type rat-race coupler designs,” APEMC, 2015 Asia-Pacific Symposium on, pp. 724-727, May 2015.
[6] Aditi Khandelwal, Shreya Gupta and K. Shambavi, “Design and analysis of rat race coupler at C band,” ICICCS, 2017 International Conference on, pp. 1126-1130, June 2017.
[7] Chih-Kai Yang, Yu-Hui Shih, Kuang-Hao Lin and Jan-Dong Tseng, “An adjustable unequal power divider design,” iWEM, 2014 IEEE International Workshop on, pp. 74-75, Aug. 2014.
[8] E.J. Wilkinson, “An N-Way Hybrid Power Divider,” IRE Transactions on Microwave Theory and Techniques, vol. 8, no. 1, pp. 116-118, Jan. 1960.
[9] Wenhua Chen, Seyed Aidin Bassam, Xiang Li, Yucheng Liu, Karun Rawat, Mohamed Helaoui, Fadhel M. Ghannouchi and Zhenghe Feng “Design and Linearization of Concurrent Dual-Band Doherty Power Amplifier With Frequency-Dependent Power Ranges,” IEEE Transactions on Microwave Theory and Techniques, vol. 59, no. 10, pp. 2537-2546, Oct. 2011.
[10] F. Burdin, Z. Iskandar, F. Podevin, and P. Ferrari, “Design of compact reflection-type phase shifters with high figure-of-merit,” IEEE Trans. Microwave Theory Tech., vol. 63, no. 6, pp. 1883-1893, Jun. 2015.
[11] David M. Pozar,譯者郭仁財,“微波工程”,高立圖書有限公司,91年7月。
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