請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/47746
標題: | 應用於微波與毫米波混波器及倍頻器之研製 Design of Mixers and Frequency Doublers for Microwave and Millimeter-wave Applications |
作者: | Jung-Hau Chen 陳仲豪 |
指導教授: | 王暉 |
關鍵字: | 混波器,倍頻器,平衡不平衡轉換器,電流再利用,柴比雪夫帶通濾波器,反射器,可調機制, mixer,frequency doubler,balun,current-reused,Chebyshev band-pass fitler,reflector,tuning machanism, |
出版年 : | 2010 |
學位: | 碩士 |
摘要: | 本論文主要是在討論一個結合平衡不平衡轉換器實現的混波器以及兩個應用於K頻段的倍頻器。研究方向主要著重於發展第一個使用金氧半製程毫米波之寬頻環狀混波器及兩個具有高轉換增益和對基頻隔離度之倍頻器。
此論文共分三個部份,在第一部份中先討論並設計一個使用金氧半製程的15-50 GHz 平衡式寬頻環狀混頻器,相較於之前發表過的論文,此電路具有相當良好的線性度,適合應用於寬頻系統接收端.同時這也是第一個以金氧半製程實現的毫米波頻段的寬頻環狀混波器;第二部份則是介紹一個使用金氧半製程的K頻段倍頻器,此倍頻器架構為一個單端倍頻器及一個疊接放大器以電流再利用的方式連接起來,並於輸出端使用一個柴比雪夫帶通濾波器,來做為輸出端的匹配電路及改善對基頻的隔離度,以及使用反射器增加轉換增益。使得此電路具有不錯的轉換增益及維持良好的對基頻隔離度,亦不需太高的輸入功率;第三部份是設計並實現另一個使用金氧半製程的K頻段倍頻器,此倍頻器無需使用寬頻平衡不平衡轉換器或分布式架構,且所需功耗甚低。為了改善轉換增益,於輸入匹配電路中加入了可調式的機制來改善。並同時利用可調式的反射器來改善頻段內的對基頻的隔離度,使得對基頻的隔離度於頻段內均有 32.5 dB以上的表現。因為只用到一個電晶體,所以只需0 dBm輸入功率即可推動此倍頻器,且可有效減少系統所需功耗。 This thesis presents a broadband doubly balanced resistive ring mixer with the baluns and two K-band single-ended frequency doublers. The research is focused on the development of a broadband resistive ring mixer in millimeter-wave frequency using CMOS technology, and two K-band frequency doublers with high conversion gain and good isolation. This thesis consists of three parts. The first part introduced a 15-50 GHz doubly balanced resistive ring mixer using CMOS process. Besides, this is the first doubly balanced resistive ring mixer in millimeter-wave using CMOS technology. Compared with the previously published broadband mixers, this mixer has high linearity and is suitable for the application for the receiver of the broadband systems. In the second part, a K-band CMOS frequency doubler is realized. The circuit schematic is a frequency doubler that is connected to a cascode amplifier with the current-reused topology, and a Chebyshev band-pass filter is used in the output port to be the output matching network and increase the fundamental rejection. This circuit can improve the conversion gain and maintain good fundamental rejection. In addition, the circuit does not need a large input power. Another K-band CMOS frequency doubler is designed and presented in part three. Without using a wide bandwidth balun or a distributed structure, the frequency mixer can achieve wide bandwidth and consume low dc power consumption. To achieve a good conversion gain in full K-band, the tuning mechanism at the input matching network is adopted. Moreover, a tunable reflector is utilized in this circuit to increase the fundamental rejection, thus the fundamental rejection of this circuit achieving above 32.5 dB in the K-band. Furthermore, since only one transistor is used in this frequency doubler, 0 dBm input power is sufficient to drive this frequency doubler, and thus the required dc power consumption of the frequency source in the system can be reduced effectively. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/47746 |
全文授權: | 有償授權 |
顯示於系所單位: | 電信工程學研究所 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-99-1.pdf 目前未授權公開取用 | 1.27 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。