标题: 双频滤波器之设计~利用贯孔墙类波导结构
A dual-bandpass filter using via-hole-wall waveguide
作者: 吴宗霖
Zong-Lin Wu
黄瑞彬
Ruey-Bing Hwang
电信工程研究所
关键字: dual-badnpass filter;higher harmonics;双频滤波器;高频谐波
公开日期: 2006
摘要: 本论文提出一个具转角设计的双频滤波器。由于这个转角的设计,发现在不影响滤波器的双频通带响应下,其高频谐波响应有将-30dB的抑制,且我们可调整共振腔的长度来控制第二个频道的频率。同时,可藉由改变共振腔来得到想要的频宽。为了证明所提出滤波器有以上的特性,我们实作四个有不同共振腔长度的滤波器,由量测的结果说明,这种有转角的双频滤波器,其高频谐波平均可以抑制在-25dB以下。
In this thesis, we proposed a planar dual-bandpass filter with bend design. With this bend structure, the higher harmonics response of the proposed dual-bandpass filter can have a suppression of nearly -30dB; meanwhile, the first and the second pass-band specifications remain unchanged. Besides, we found that the second pass-band frequency is tunable by adjusting the length of each cavity. In order to demonstrate the proposed filter performance, four filters with different cavity length were implemented on a low-loss dielectric substrate. In addition to changing the length of each cavity, we changed the aperture length to observe the variation of pass-band bandwidth. From the simulated and measured results, the proposed filter obtains more than -25 dB suppression in average. The measurement shows a very good agreement with simulation.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT009313645
http://hdl.handle.net/11536/78459
显示于类别:Thesis


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  1. 364501.pdf
  2. 364502.pdf
  3. 364503.pdf

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