When the input signal of the device under test contains nonlinear distortions due to for instance source-pull, the ACPR will result in an over- or underestimation of the level of nonlinear distortions. A high ACPR corresponds to a strong nonlinear device. The ACPR describes the level of distortions generated by the nonlinear behavior of RF components and is often used to characterize the linearity of a device. The amount of interference, or power, in the adjacent frequency channel is represented by the Adjacent co-Channel Power Ratio (ACPR), which is defined as the ratio of the average power in the adjacent frequency channel to the average power in the transmitted frequency channel. Hence, when designing RF systems it is very important to know the amount of in- and out-of-band nonlinear distortions that will be generated by the devices. In practice, this “frequency leaking” is caused by the nonlinear behavior of components and systems. Sharing these limited frequencies requires that each application does not “leak” into the frequency band of the other. Thousands of telecommunication applications are used daily, and they all require their own piece of bandwidth. ![]() ![]() Kurt Barbé, in Microwave De-embedding, 2014 6.5.1 Adjacent co-channel power ratioįrequency bandwidth is very scarce and expensive nowadays. Measuring and Characterizing Nonlinear Radio-Frequency Systems
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