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| 动态偏置射频功率放大器研究 | |
| 引用本文： | 何松柏,游飞. 动态偏置射频功率放大器研究[J]. 电子科技大学学报(社会科学版), 2009, 0(2) |
| 作者姓名： | 何松柏 游飞 |
| 作者单位： | 电子科技大学电子工程学院; |
| 基金项目： | 国家863计划(2007AA01Z283) |
| 摘 要： | 分析了功率放大器输入输出响应特性与栅极偏置电路时间常数的关系,以及信号通过功率放大器后的矢量幅度误差(EVM)和邻信道功率抑制比(ACPR)。并基于MW4IC2230设计了工作于2GHz频段,输出33dBm的TD-SCDMA三载波射频功率放大器,以验证该关系。当动态偏置电路时间常数为1ms时,功率放大器输出EVM为2.5%,ACPR为?43dB。根据TD-SCDMA物理信道特点,提出对偏置电路的控制可以比传输信号起始时刻提前,当该提前量为1.5μs、动态偏置电路时间常数为1ms时,功率放大器输出EVM为1.8%,ACPR为?45dB,满足TD-SCDMA系统标准要求。 |
| 关 键 词： | 邻信道功率抑制比 动态偏置 矢量幅度误差 射频功率放大器 时分同步码分多址接入 |
Investigation of RF Power Amplifiers in Dynamic Bias Operation |
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| HE Song-bai , YOU Fei. Investigation of RF Power Amplifiers in Dynamic Bias Operation[J]. Journal of University of Electronic Science and Technology of China(Social Sciences Edition), 2009, 0(2) | |
| Authors: | HE Song-bai YOU Fei |
| Affiliation: | School of Electronic Engineering;University of Electronic Science and Technology of China Chengdu 610054 |
| Abstract: | Radio frequency power amplifiers are analyzed in respect of their characteristics including the relation between the output response and the time constant of the gate dc bias circuits, error vector magnitude (EVM) and adjacent channel power ratio (ACPR) of the output signal. A power amplifier with 33 dBm output power at 2 GHz is desighed and tested to verify the analysis. When the dynamic gate bias voltage works in a time constant of 1 ms, the amplifier is measured with EVM of 2.5% and ACPR of ?43 dB. After... |
| Keywords: | ACPR dynamic bias mode EVM RF power amplifier TD-SCDMA |
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