尚未登入 請由此登入
 
 
 










知識分享平台Eshare檢視資訊View
返回前一頁Back
      [檢舉]

標題Title: Dual-Band Bandpass Ceramic Filters with Meandering Feeding Lines
作者Authors: 鄭建民,Hung-Chi Yang..等
上傳單位Department: 電子工程系
上傳時間Date: 2009-12-3
上傳者Author: 鄭建民
審核單位Department: 電子工程系
審核老師Teacher: 鄭建民
檔案類型Categories: 論文Thesis
關鍵詞Keyword: Coupled line,dual-band,stepped impedance resonator
摘要Abstract: In the applications of modern wireless communication systems, for the purpose of miniaturization and dual-band (2.4 and 5.7 GHz) operations, a pair of modified back-to-back stepped impedance resonators (SIR) were involved in a pair of modified meandering coupled lines to form a compact structure in this research. Owing to the high quality factor and dielectric constant Aluminum Oxide (Al2O3) ceramic substrate was used, the characteristics of this filter could be improved and the size of the filters could be minimized to only 22.2 mm  12 mm. Furthermore, the modified back-to-back SIR structures could be used to adjust the second resonant frequency (second harmonic) to a suitable frequency by adjusting of the impedance ratio (K values), and the modified meandering coupled line structures could be used to excite additional transmission zeros to improve the performance of the proposed filter. In this research, by the combination of the modified meandering coupled lines and the modified back-to-back SIR, the optimum measured insertion loss and bandwidth of the proposed dual-band bandpass filter for 2.4 GHz are 0.98 dB and 11.1 %, respectively. And the optimum measured insertion loss and bandwidth of the proposed dual-band bandpass filter for 5.7 GHz are 1.05 dB and 10.1 %, respectively.

檔案名稱
FileName
檔案大小
Size
檔案格式
Format
瀏覽次數
Browses
下載次數
Downloads
2009_12_69c7c329.pdf 458Kb pdf 430 144
文件中檔案:
 

開啟檔案Download
 
 
返回前一頁