多頻帶功率分配器與寬截止頻帶濾波器

Design Of Multi-band Power Dividers And Wide Stopband Filters

鄭子政(Cheng,Tzucheng)

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

本論文分為兩部份。第一部份提出由耦合線串接短路殘段構成的雙頻帶相移器來實現雙頻帶功率分配器，由雙頻帶相移器串接四分之一波長傳輸線可以產生額外的頻帶來實行三頻帶功率分配器，分析方式採用雙頻帶相移器等效成四分之一波長傳輸線，經由推導得到四分之一波長傳輸線抗與雙頻帶相移器耦合線奇偶模阻抗的關係。

第二部份則是介紹兩個寬頻濾波器的設計，第一個寬頻濾波器的分析方式採用J 反轉子，並且經由適當的選擇短路殘段的電器長度以及帶止濾波器的阻抗值來控制傳輸零點以達到諧波抑制;第二個則是雙頻帶通濾波器並且經由帶止濾波器來抑制諧波。

上述電路的設計，均使用全波電磁模擬軟體IE3D 進行模擬輔助，並實際製
作電路進行量測。經由電磁模擬與量測的比較結果，兩者具有較好的一致性。

關鍵字

雙頻帶相移器 ； 雙頻帶功率分配器 ； 三頻帶功率分配器 ； J 反轉子 ； 諧波抑制 ； 帶止濾波器 ； 雙頻帶通濾波

並列摘要

There are two parts in this thesis. The introduction in the first part is design of dual-band power divider employing dual-band phase shifter is composed by a coupled line with short-stub. Derive tri-band power divider by using quarter wavelength transmission line at the input or output port of dual-band phase shifter. I use quarter wavelength transmission line to substitute for dual-band phase shifter. Derive from the solutions relating quarter wavelength transmission line impedance and odd mode and even mode impedance of dual-band phase shifter.

In the second part, the wideband bandpass filters are presented, in the first filter, we analyzed the circuit by J inverter, design the electrical length of the short stub and choose the impedance of the band stop filter appropriately to control the transmission zeros to suppress the spurious band. The second filter is dual band pass filter, to choose band stop filter to suppress the spurious band.

All the above mentioned circuits are simulated by using full-wave
electromagnetic simulator IE3D, and the prototype of these circuits are fabricated and measured. The match well result between electromagnetic simulation and measured data can evidence the availability of all proposed circuits.

並列關鍵字

dual-band phase shifter ； dual-band power divider ； tri-band power divider ； J inverter ； harmonic suppression ； bandstop filter ； dual band pass filter

參考文獻

[1] D. M. Pozar, Microwave Engineering, 3nd edition, John Wiley & Sons, 2005.

Applications, John Wiley & Sons, 2001.

[4] E. M. T. Jones, “Coupled-strip-transmission-line filters and directional couplers,”IEEE Trans. Microw. Theory Tech., vol. 4, no. 2, pp. 75–81, Apr. 1956.

components using composite right/left-handed transmission lines,” IEEE Trans.

[6] M. J. Park and B. Lee, “A dual-band Wilkinson power divider,” IEEE Microw.