串接/並接微擾雙模方環帶通濾波器之設計

Design of dual-mode square-loop resonators with series and parallel perturbations

李炯宏(Chiung-Hung Li)

指導教授 ： 劉智群

健行科技大學/電資學院/電機工程所/碩士(2009年)

摘要

本論文設計三種雙模方環型濾波器，應用串/並接希爾伯特曲線達到微擾效果，以產生寬頻響應，且具有多重諧振之特性。其次，藉由調整微擾參數以控制多重諧振之諧振點個數，使諧振點從第二、第三、第四、第五個諧振點都可以產生出來。最後，將濾波器串聯，使頻率響應更為左右對稱，並以電流分佈及頻率響應探討其特性。
在並接一次遞迴希爾伯特微擾雙模方環濾波器的設計中，其頻率響應特性可達到較佳的效果，其比例頻寬可達到65％，低介入損耗為-0.5 dB，通帶外的高衰減特性為-49.51 dB。

關鍵字

希爾伯特空間填充曲線 ； 雙模 ； 方環型諧振器 ； 多重諧振

並列摘要

The Hilbert-curve perturbation to series and parallel connected with three dual-mode square-loop resonators (DMSLR) are introduced for multiple resonances and wideband filters in this thesis. Multiple resonances features included dual modes, third, fourth and fifth resonances are presented with resonance splitting plots. The cascaded DMSLR with Hilbert-curve perturbation will obtain a higher rejection and symmetry responses. Results including surface current distributions and frequency responses are presented and discussed.
The DMSLR with first iteration Hilbert-curve exhibit the good performance that including low insertion loss (0.5 dB) and high out-of-band rejection level (-49.51 dB) and wider band (BW 65%).

並列關鍵字

Hilbert-curve ； dual-mode ； square-loop resonators ； multiple resonances

參考文獻

參考文獻

[1] P. Troughton, “Measurement Techniques in Microstrip,” Electronics Letters, Volume 5, Issue 2, pp. 25-26, Jan. 1969.

[2] K. Chang and L. H. Hsieh, Microwave Ring Circuits and Related Structures, John Wiley and Sons, Inc., 2004.

[3] I. Wolff, “Microstrip Bandpass Filter Using Degenerate Modes of A Microstrip Ring Resonator,” Electronics Letters, Volume 8, Issue 12, pp. 302-303, Jun. 1972.

[4] J. S. Hong and M. J. Lancaster, “Bandpass Characteristics of New Dual-mode Microstrip Square Loop Resonators,” Electronics Letters, Volume 31, Issue 11, pp. 891-892, May 1995.