多頻段微波帶通濾波器設計之研究

Multi-Band Bandpass Filter Design

林生峰(Sheng-Feng Lin)

指導教授 ： 黃建彰

元智大學/工程學院/通訊工程學系/碩士(2006年)

摘要

本論文主要在利用平行式的方法，以及步階阻抗諧振器雙頻帶的特性，設計一種多頻帶帶通濾波器。此多頻帶濾波器工作於1.76~1.84 GHz (GSM 1.8GHz)、2.4~2.4835 GHz (IEEE 802.11b/g)、5.15~5.25 GHz (IEEE 802.11a)、3.4~3.53 GHz (WiMax 3.5GHz)以及5.85~5.925 GHz (Dedicated Short Range Communications, DSRC) 等五個頻帶，經實作與量測所得到之結果為：在第一頻帶1.765~1.788 GHz其S11 < 7.5 dB、S21 > 10.4 dB，在第二頻帶2.462~2.534 GHz其S11 < 19.83 dB、S21 > 9 dB，在第三頻帶3.381~3.467 GHz其S11 < 14.2 dB、S21 > 7.4 dB，在第四頻帶5.084~5.159 GHz其S11 < 8.6 dB、S21 > 8.9 dB，在第五頻帶5.7~5.845 GHz其S11 < 7.6 dB、S21 > 8.44 dB，驗證了此方法之可行性。

關鍵字

平行式的方法 ； 步階阻抗諧振器 ； 多頻帶濾波器

並列摘要

In this thesis a multi-band filter design using a new parallel-way method with step-impedance resonators (SIR) is presented for multi-mode wireless communications applications. The multi-band filter includes 1.76~1.84 GHz (GSM 1.8 GHz), 2.4~2.4835 GHz (IEEE 802.11b/g), 5.15~5.25 GHz (IEEE 802.11a), 3.4~3.53 GHz (WiMax 3.5 GHz), and 5.85~5.925 GHz (Dedicated Short Range Communications, DSRC) five bands. The final measurement results are listed as follows: the first band 1.765~1.788 GHz with S11 < 7.5 dB and S21 > 10.4 dB; the second band 2.462~2.534 GHz with S11 < 19.83 dB and S21 > 9 dB; the third band 3.381~3.467 GHz with S11 < 14.2 dB and S21 > 7.4 dB; the fourth band 5.084~5.159 GHz with S11 < 8.6 dB and S21 > 8.9 dB; the fifth band 5.7~5.845 GHz with S11 < 7.6 dB and S21 > 8.44 dB. These results validate the parallel-way design method way with SIR configurations for multi-band/multi-mode wireless applications.

並列關鍵字

parallel-way method ； step-impedance resonators (SIR) ； multi-band filter

參考文獻

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