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標題: | 應用於提升空間傳輸效率之電路技巧 Circuit Techniques for Spatial Transmission Efficiency Enhancement |
作者: | Wei-Lun Ou 歐瑋倫 |
指導教授: | 呂良鴻 |
關鍵字: | 移相器,功率放大器, Phase Sifter,Power Amplifier, |
出版年 : | 2015 |
學位: | 碩士 |
摘要: | 本論文提出應用於相位陣列訊號強度改善以及傳輸效率的提升的電路技巧。第一個技巧著重於整合不同功能的電路,其包含了傳輸端的上變頻混頻器與移相器。藉由重複利用硬體完成向量和演算法而提出一個相位移動調變器的架構。因在基頻訊號完成移動相位,所以可以改善製成環境變異對精準度的影響。此外,提出一個不需額外硬體可提升功率後移效率多模功率放大器的方式。藉由改變硬體份數以及使用變壓器本身的訊號轉換功能,不同模式下皆可達到最佳負載阻抗。本論文實作三個晶片驗證上述的方法,其中包含一個相位移動調變器、一個雙模功率放大器與一個多模功率放大器。 In this thesis, circuit techniques are developed to improve the signal intensity and transmission efficiency of phased array systems. The first technique focuses on the integration of typical functional blocks such as up-conversion mixer and phase shifter in the transmitter chain. By sharing the hardware to facilitate a vector-summed algorithm, a phase shifting modulator architecture is proposed. Since the phase is rotated in the baseband domain, the accuracy is improved at the presence of PVT variations. In addition, a reconfigurable method for multi-mode power amplifiers (PAs) is presented to enhance the transmission efficiency without excess hardware overhead. By resizing the active device and exploiting the signal conversion nature of on-chip transformers, the optimal load impedance for maximum power delivery in different power modes is achieved. In order to validate such concept, two circuits including a dual-mode PA and a multi-mode PA are fabricated on a chip prototype for demonstrations. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/51727 |
全文授權: | 有償授權 |
顯示於系所單位: | 電子工程學研究所 |
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ntu-104-1.pdf 目前未授權公開取用 | 5.58 MB | Adobe PDF |
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