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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/32606
標題: | 適用於2.45/3.5 GHz之全相域相移器 Full-Range Phase Shifters at 2.45/3.5 GHz |
作者: | Chia-Yu Chan 詹佳諭 |
指導教授: | 江簡富(Jean-Fu Kiang) |
關鍵字: | 相移器, phase shifter, |
出版年 : | 2006 |
學位: | 碩士 |
摘要: | 本論文使用切換式衰減器以及集總元件取代傳輸線,並串接一三位元向量和相移器及一主動全通式相移器,構成一小體積、全相域、高精確度之可調式相移器。此相移器被設計在2.45 GHz及3.5 GHz並以FR4印刷電路板實作,適合WiMax之應用。 In this thesis, full-range phase shifters at 2.45/3.5 GHz are designed and implemented, each of which consists of a lumped 3-bit vector-sum phase shifter and an active all-pass phase shifter. In the 3-bit vector-sum phase shifter, switched attenuators are used to provide attenuation difference with reduced circuit size. The hybrid coupler, Wilkinson dividers, and the 180$^circ$ phase shifter are also designed using lumped inductors and capacitors for size reduction. To reduce the insertion loss and enhance the phase resolution of the phase shifter, an active all-pass phase shifter is cascaded with the 3-bit vector-sum phase shifter. Around 2.45 GHz, measurement results of the 3-bit vector-sum phase shifter show that the standard deviation of phase shift is 9.6 degrees, insertion-loss variation is confined within 4 dB, and the return loss is above 10 dB. The active all-pass phase shifter has gain above 5 dB with phase shift range up to 61 degrees. Around 3.5 GHz, measurement results of the 3-bit vector-sum phase shifter show that the standard deviation of phase shift is 9.9 degrees, insertion-loss variation is confined within 4.7 dB, and the return loss is above 10 dB. The active all-pass phase shifter has gain between 12.7-13.7 dB with phase shift range up to 101 degrees. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/32606 |
全文授權: | 有償授權 |
顯示於系所單位: | 電信工程學研究所 |
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ntu-95-1.pdf 目前未授權公開取用 | 8.98 MB | Adobe PDF |
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