雙頻等功率分配器與雙頻帶通濾波器設計暨結合

本論文分雙頻等功率分配器與雙頻等功率分配器兩個部分探討。第一部分為第三章的雙頻等功率分配器，藉由改良傳統威金森功率分配器，利用傳輸線轉換耦合線的方法，透過數學公式的驗證，設計出頻帶可調控之雙頻等功率分配器。第二部分為第五章的雙頻等功率分配器，分別介紹兩種雙頻濾波器。第一種為平行耦合線左右末端各接一開路殘段，可以在諧振頻率兩側，產生傳輸零點；第二種為雙路徑步階諧振腔雙頻濾波器，透過數學公式的分析與驗證，設計出可以調控頻帶與頻寬的雙頻濾波器，並利用指叉式電容補償的方法來解決平行耦合線在微帶線實作上奇偶模相數不一的問題。最後將上述雙頻等功率分配器與雙頻帶通濾波器作結合，實現具有濾波功能的雙頻等功率分配器。上述電路均使用全波電磁模擬軟體進行模擬工作，並實際進行電路製作與量測。經由量測結果與電磁模擬相比較，確實驗證與理論有良好的一致性。

關鍵字

微帶線；雙頻帶通濾波器；雙頻等功率分配器；指叉式電容

並列摘要

This thesis is included two parts, the first part introduces a dual-band equal power divider in chapter 3 and the second part of chapter 5 is about dual-band bandpass filter. In order to improve the traditional Wilkinson power divider, the transmission lines have been converted into parallel coupled lines. Moreover, the mathematical analyses are provided to verify and adjust the design of the dual-band power divider. The second part of chapter 5 is the dual-band bandpass filter. Two kinds of dual-band bandpass filters are introduced. The first one is that series open stub at each end of parallel coupled lines, it makes transmission zeros at two resonant frequency. The other is dual path dual-band bandpass filter, through analysis and verification to design a rectifiable frequency and bandwidth dual-band bandpass filter, and using interdigital capacitance compensation to solve the phase difference between the even mode and odd mode of parallel coupled lines. Finally, combine the dual-band equal power divider and dual-band bandpass filter above, to achieve a filtering function of dual-band equal power divider. All the circuits are simulated with full-wave electromagnetic simulator. The results are well match between electromagnetic simulations and measurements can evidence the availability of all proposed circuits.

並列關鍵字

microstrip line ； dual-band bandpass filter ； dual-band equal power divider ； interdigital capacitor

參考文獻

[1] D. M. Pozar, Microwave Engineering. John Wiley and Sons, 1998. 2nd, ch.8.

[3] E. J. Wilkinson, “An N-way hybrid power divider,” IRE Trans. Microwave Theory Tech., vol. 8, no. 1, pp. 116–118, Jan. 1960.

[4] J. Wang, B.-Z. Wang, Y.-X. Guo, L. C. Ong, and S. Xiao, “Compact slow-wave microstrip rat-race ring coupler,” Electron. Lett., vol. 43, pp. 111–113, Jan. 18 2007.

[5] J. Wang, B. Z. Wang, Y. X. Guo, L. Ong, and S. Xiao, “A compact slow-wave microstrip branch-line coupler with high performance,” IEEE Microw. Wireless Compon. Lett., vol. 17, no. 7, pp. 501–503, Jul. 2007.

[6] J. He, B.-Z. Wang, and W. Shao, “Compact power divider embedded with zigzag microstrip slow-wave structures,” Electron. Lett., vol. 45, pp. 62–63, Jan. 2009.

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雙頻等功率分配器與雙頻帶通濾波器設計暨結合

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