دانلود مقاله ISI تقویت کننده توان خطی و مؤثر مبتنی بر حذف و بازیابی پوش
عنوان انگلیسی مقاله:
Efcient and Linear Power Amplier Based on Envelope Elimination and Restoration
ترجمه فارسی عنوان مقاله:
تقویت کننده توان خطی و مؤثر مبتنی بر حذف و بازیابی پوش
چکیده انگلیسی مقاله:
Abstract- This letter describes a power ampli?er (PA) with high linearity based on the envelope elimination and restoration (EER) technique. PAs based on this technique are composed of a highly ef?cient nonlinear PA (class E) that performs phase modulation and a wide bandwidth envelope ampli?er that supplies the nonlinear PA and has to inject the envelope through power supply modulation. The design of the envelope ampli?er is a complicated task due to the tradeoff between demanded high ef?ciency and very wide bandwidth. In order to obtain a reasonably high ef?ciency and very wide bandwidth, a solution based on the multilevel converter in series with a linear regulator is proposed. It provides up to 100 W of peak power and tracks sine waves up to 2 MHz. The class E ampli?er has been optimized for high-ef?ciency (near 85%) and high-frequency (120 MHz) operation. The experimental results presented in this letter validate the proposed solutions for the envelope and phase ampli?er, demonstrate that the implemented EER PA can handle up to 100 W of peak power, and highlight its high linearity (around 40 dB of attenuation of the intermodulation products) and high ef?ciency (up to 25% less power losses than an ideal class B ampli?er).
منتشر کننده مقاله: IEEE
سال انتشار مقاله: 2012
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