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首页> 外文期刊>Very Large Scale Integration (VLSI) Systems, IEEE Transactions on >Phase Distortion to Amplitude Conversion-Based Low-Cost Measurement of AM-AM and AM-PM Effects in RF Power Amplifiers
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Phase Distortion to Amplitude Conversion-Based Low-Cost Measurement of AM-AM and AM-PM Effects in RF Power Amplifiers

机译：基于相位失真到幅度转换的射频功率放大器中AM-AM和AM-PM效应的低成本测量

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摘要

This work develops a simple, practical yet easily realizable method for low cost measurement of phase and amplitude distortions in radio frequency power amplifiers (RF PA). Amplitude-to-amplitude (AM-AM) and amplitude-to-phase (AM-PM) distortions are two significant distortion effects in PAs at high output power levels, causing out of band interference in the transmitted signal and bit errors in the received signal. Traditional measurements of amplitude and phase distortion in RF PAs require the use of expensive vector network analyzers. In this work, we propose the use of phase-to-amplitude conversion to develop a low cost and accurate test methodology for AM-AM and AM-PM measurement using simple load board test circuitry along with software based difference generation and peak detection mechanisms. Using either simple sine wave stimulus with power sweep or a single amplitude modulated RF stimulus, both distortion effects can be measured with high accuracy for nominal devices as well as over process and voltage variations, while allowing significant reduction in test cost.
机译：这项工作为射频功率放大器（RF PA）中相位和幅度失真的低成本测量开发了一种简单，实用且易于实现的方法。幅度到幅度（AM-AM）和幅度到相位（AM-PM）失真是高输出功率电平下PA中的两个重要失真效应，导致发射信号中的带外干扰和接收到的误码信号。 RF PA中幅度和相位失真的传统测量需要使用昂贵的矢量网络分析仪。在这项工作中，我们建议使用相位到幅度转换来开发低成本和准确的测试方法，以使用简单的负载板测试电路以及基于软件的差分生成和峰值检测机制来进行AM-AM和AM-PM测量。使用带功率扫描的简单正弦波激励或单个幅度调制的RF激励，可以对标称器件以及整个过程和电压变化进行高精度的两种失真效应测量，同时可以显着降低测试成本。

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