臺灣博碩士論文加值系統

本論文共提出了兩種電路，第一種為平衡式濾波型雙功能耦合器，第二種則是寬頻濾波型跨接耦合器電路。
平衡式濾波型雙功能耦合器的工作頻帶設計於2 GHz與5.2 GHz，分別具有跨接耦合器與功率分配器的功能。先後設計平衡式濾波型跨接耦合器與平衡式濾波型功率分配器，最後再將兩者整合到一起來實現雙功能設計。電路架構採用接上開路單株的環形共振器來設計，利用各共振器不同的高階共振頻率來抑制不必要的頻率響應，來使兩個電路功能不會互相影響，且由於共振器之間同時發生共振耦合的特性，電路會呈現高選擇性的帶通響應。
寬頻濾波型跨接耦合器電路以兩節支線耦合器重新設計而成，設計分為3階段：改善通帶內隔離度，帶通響應設計以及寬頻響應設計。前兩者利用四分之一波長的兩端開路耦合線串接兩節支線耦合器有效改善了通帶內隔離度以及產生了帶通響應。而後者則是加上兩端開路耦合線作為輸入/輸出匹配網路以進一步提高頻寬表現以及頻率選擇性。

This thesis presents two types of circuits, one of which is a balanced filtering dual-function coupler, the other being a wideband filtering crossover.
The balanced filtering dual-function coupler aims to operate at 2 GHz and 5.2 GHz with functions of a crossover and a power divider, respectively. A balanced filtering crossover is designed followed by a balanced filtering power divider. The dual-function coupler is then realized by combining the designed crossover and power divider. The circuit adopts stub-loaded ring resonators with different high-order resonant frequencies to suppress spurious responses. High isolation between two circuit functions will be achieved. Due to the coupling between resonators, the coupler will also exhibit a bandpass response with high selectivity.
The wideband filtering crossover is redesigned using a two-section branch line coupler. The design has three stages: isolation improvement, bandpass response, and wideband response. Isolation improvement and bandpass response are fulfilled by cascading two branch line couplers with quarter-wavelength open-circuited coupled lines. To further improve the performance of bandwidth and frequency selectivity, additional open-circuited coupled lines are used as input/output matching networks.

論文審定書

中文摘要

英文摘要

第一章 文獻回顧

第二章 平衡式濾波型雙功能耦合器
2.1 設計理論
2.1.1 步階式阻抗環型共振器設計
2.1.2 平衡式網路的S參數計算
2.1.3 品質因子與耦合係數計算
2.1.4 帶通濾波器設計

2.2 平衡式跨接耦合器設計
2.2.1 模擬結果

2.3 平衡式功率分配器設計
2.3.1 模擬結果

2.4 雙頻阻抗轉換器設計

2.5 平衡式濾波型跨接耦合器與功率分配器整合設計

2.6 模擬與量測結果
2.6.1 差模S參數
2.6.2 共模S參數
2.6.3 跨模S參數

2.7 小結

第三章 寬頻濾波型跨接耦合器
3.1 使用2節支線耦合器實現跨接耦合器

3.2 設計A：頻帶內隔離度改善
3.2.1 參數分析-Z3
3.2.2 參數分析-Zt
3.2.3 模擬與量測結果

3.3 設計B：帶通響應設計
3.3.1 參數分析-Z3
3.3.2 參數分析-C
3.3.3 模擬結果

3.4 設計C：寬頻響應設計
3.4.1 參數分析-Z1
3.4.2 參數分析-C
3.4.3 模擬與量測結果

第四章 結論
參考文獻

[1]X. Y. Zhang, Q. Guo, K. Wang, B. Hu, and H. L. Zhang, “Compact filtering crossover using stub-loaded ring resonator,” IEEE Microwave and Wireless Components Letters, vol. 24, no. 5, pp. 327-329, May 2014.

[2]C.-I. Lu and Y.-H. Pang, “A Compact Balanced Filtering Crossover with Wide Stopband Rejection,” in Asia-Pacific Microwave Conference, Dec. 2019, pp. 309-311.

[3]S. Chen, W.-C. Lee and T.-L. Wu, “Balanced-to-Balanced and Balanced-to-Unbalanced Power Dividers With Ultra-Wideband Common-Mode Rejection and Absorption Based on Mode-Conversion Approach,” IEEE Transactions on Components, Packaging and Manufacturing Technology, vol. 9, no. 2, pp. 306-316, Feb. 2019.

[4]L. Chang and T.-G Ma, “Dual-Mode Branch-Line/Rat-Race Coupler Using Composite Right-/Left-Handed Lines,” IEEE Microwave and Wireless Components Letters, vol. 27, no. 5, pp. 449-451, May 2017.

[5]I.-J. Chen, C.-I. Lu, and Y.-H. Pang, “Wideband Dual-Function Circuit with Switchable Crossover/Branch-Line Coupler Characteristics,” in Asia-Pacific Microwave Conference, Dec. 2019, pp. 1116-1118.

[6]C.-W. Tang, C.-T. Tseng, and K.-C. 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.

[7]W. A. Arriola, J. Y. Lee, and I. S. Kim, “Wideband 3-dB Branch Line Coupler Based on /4 Open Circuited Coupled Lines,” IEEE Microwave and Wireless Components Letters, vol. 21, no. 9, pp. 486-488, Sept. 2011.

[8]J. Yao, C. Lee, and S. P. Yeo, “Microstrip Branch-Line Couplers for Crossover Application,” IEEE Transactions on Microwave Theory and Techniques, vol. 59, no. 1, pp. 87-92, Jan. 2011.

[9]C. Zhao, W. Feng, and W. Che, “High selectivity wideband filtering crossover using stub-loaded ring resonators,” in IEEE International Conference on Microwave and Millimeter Wave Technology, Jun. 2016, pp. 73-75.

[10]Y.-Y Lin, B.-L Jiang, C.-Y Huang, and C.-W Tang, “Design of a wideband planar patched crossover with slotted lines,” in Asia Pacific Microwave Conference, Nov. 2017, pp. 280-282.

[11]C.-W Tang, K.-C Lin, and W.-C Chen, “Analysis and Design of Compact and Wide-Passband Planar Crossovers,” IEEE Transactions on Microwave Theory and Techniques, vol. 62, no. 12, pp. 2975-2982, Dec. 2014.

[12]Z.-W. Lee and Y.-H. Pang, “Compact planar dual-band crossover using two-section branch-line coupler,”  Electronics Letters, Stevenage vol. 48, Iss. 21, Oct. 2012.

[13]C.-F. Chen, T.-Y. Huang, and R.-B. Wu, “Design of microstrip bandpass filters with multiorder spurious-mode suppression,” IEEE Transactions on Microwave Theory and Techniques, vol. 53, no. 12, pp. 3788-3793, Dec. 2005.

[14]C.-F. Chen, T.-Y. Huang, and R.-B. Wu, “Design of Dual- and Triple-Passband Filters Using Alternately Cascaded Multiband Resonators,” IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 9, pp. 3550-3558, Sept. 2006.

[15]M. Sagawa, M. Makimoto, and S. Yamashita, “Geometrical structures and fundamental characteristics of microwave stepped-impedance resonators,” IEEE Transactions on Microwave Theory and Techniques, vol. 45, no. 7, pp. 1078-1085, July 1997.

[16]T. Jensen, V. Zhurbenko, V. Krozer, and P. Meincke, “Coupled Transmission Lines as Impedance Transformer,” IEEE Transactions on Microwave Theory and Techniques, vol. 55, no. 12, pp. 2957-2965, Dec. 2007.

[17]J.-S. Hong, Microstrip Filters for RF/Microwave Applications, 2nd ed., John Wiley & Sons, Inc., 2011, chap.7-8.

[18]C. Monzon, “A small dual-frequency transformer in two sections,” IEEE Transactions on Microwave Theory and Techniques, vol. 51, no. 4, pp. 1157-1161, April 2003.

[19]S. Zhang and L. Zhu, “Synthesis Design of Dual-Band Bandpass Filters With /4 Stepped-Impedance Resonators,” IEEE Transactions on Microwave Theory and Techniques, vol. 61, no. 5, pp. 1812-1819, May 2013.

[20]W. Fan, A. Lu, L. L. Wai, and B. K. Lok, “Mixed Mode S-parameter Characterisation of Differential Structures,” in Electronics Packaging Technology Conference, Dec. 2003, pp. 533-537.

[21]M. Steer, Microwave and RF Design: Networks, Volume 3, 3rd ed. NC State University, 2019.

[22]D. A. Frickey, “Conversions between S, Z, Y, H, ABCD, and T parameters which are valid for complex source and load impedances,” IEEE Transactions on Microwave Theory and Techniques, vol. 42, no. 2, pp. 205-211, Feb. 1994.

[23]B.-R. Wu and Y.-H. Pang, “A Balanced Filtering Coupler with Functions of Crossover and Power Divider at Different Frequencies,” in International Symposium on Radio-Frequency Integration Technology, Aug. 2021, pp. 1-3.