小型化寬諧波抑制功率分配器與不等功率雙頻帶枝幹耦合器設計

Design of Compact Power Divider with Broad-Band Harmonic Suppression and Unequal Power Dual-Band Branch-Line Coupler

陳學武(Chen, Hsuehwu)

指導教授 ： 湯敬文

國立中正大學/工學院/電機工程學系/碩士(2012年)

摘要

本論文分為兩個部分。第一部分提出小型化寬諧波抑制功率分配器，使用T型電路實現小型化的效果，再利用開路殘段加入兩個傳輸零點，增加頻帶的選擇性與諧波抑制頻寬，最後使用全波電磁模擬軟體進行模擬輔助。
第二部分為不等功率雙頻帶枝幹耦合器，利用耦合線的方式產生雙頻帶的效果，藉由不同的奇耦模阻抗或是耦合線長度得到不同的頻率比，依照耦合線的長度不同與輸出埠可分為四種情形討論，接著再使用不等長的耦合線增加雙頻帶的頻率比，並且利用電容補償的方式補償耦合線奇偶模相速不同造成的誤差。
上述電路都經過實際電路製作與量測，並將量測結果與軟體之模擬進行比較之後，驗證兩者具有良好的一致性。

關鍵字

小型化 ； 諧波抑制 ； 雙頻帶

並列摘要

This thesis included two parts. The first part is design of compact power divider with harmonic suppression, Using T-type model reduce circuit size. Moreover add open stub to generate two transmission zeros for good selectivity and harmonic suppression bandwidth. Finally, the full-wave electromagnetic simulator is utilized as the design assistance.
Second part is unequal dual-band branch line coupler, The structure of this dual-band coupler is composed of three coupled lines, according to electric length of coupled lines have four case to discuss, unequal electric length can provide higher frequency ratio, Because the unequal odd-mode and even-mode phase velocity of the coupled line, the inter-digital capacitors at the source and load ports.
All circuits in this thesis are simulated with full-wave electromagnetic simulator, and these circuits have been fabricated and measured. The matched results between electromagnetic simulation and measurement can demonstrate the availability of all proposed circuits.

並列關鍵字

compact ； harmonic Suppression ； dual band

參考文獻

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[3] 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.

[4] 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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