優化WCDMA 系統之射頻功率放大器研究

Optimization of WCDMA power amplifiers

陳明榆(Ming-Yu Chen)

指導教授 ： 洪維廷

元智大學/電機通訊學院/通訊工程學系/碩士(2011年)

摘要

本論文以ANADIGICS 公司所研製的AWU-6601 射頻功率放大 器作為研究主體，利用周邊電路進行優化研究。本文運用德州儀器公 司所研製的TPS 62040 直流轉換器，轉換電池壓降，供給功率放大 器所需電壓，藉此改善功率放大器效率，再輔以低通濾波電路，濾除 因交互調變產生的低頻因素透過電源電路和偏置網路反饋回輸入端 等問題，進而改善ACLR 的不對稱性，提高功率放大器的線性度。最 後將此功率放大器進行X-參數的測試與模擬，捕捉其非線性參數， 可以加速了解放大器的各項數據，減少在實體產物下的反覆測試，幫 助研發者縮短研發時間，並提高設計精準度與效率，本文將其設計方 式與量測結果探討其特性與未來改善方向。

關鍵字

WCDMA ； 功率放大器

並列摘要

The optimization studies of RF power amplifier (PA) in AWU-6601 MMIC by ANADIGICS Inc. for WCDMA system are presented, by using some peripheral circuitries including DC-DC converter TPS-62040 from TI Inc. and low pass filter at the power supply. The DC-DC converter improves the PA efficiency by adjusting the handset battery to the optimum voltage; and the associated low pass filter reduces the inter-modulation distortion caused by the low frequency interference from power supply circuit to improve ACLR asymmetry. Finally, the X-parameter measurements are performed for the PA to demonstrate the various nonlinear parameters acquired by the X-parameter computation to accelerate the RD cycle accurately and efficiently. The thesis also addresses the future directions for PA designs and measurements.

並列關鍵字

WCDMA ； Power Amplifier

參考文獻

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