VNA-based broadband EVM measurement of an RF nonlinear PA under load mismatch conditions |
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| G. P. Gibiino, A. M. Angelotti, A. Santarelli, P. A. Traverso |
- Abstract:
- In the context of modern communications systems operating at radio-frequency (RF), the error vector magnitude (EVM) is the most commonly adopted metric to quantify modulation distortion caused by a nonlinear device. While EVM is typically measured with instrumentation featuring broad acquisition bandwidth (BW), here we implement a method based on multiple narrowband vector network analyzer (VNA) acquisitions, allowing for improved measurement accuracy and for broader characterization BWs. We report the EVM characterization of a nonlinear RF power amplifier (PA), analyzing, in particular, the case of the PA cascaded with a linear network, under load mismatch conditions as imposed by a narrowband passive tuner.
- Download:
- IMEKO-TC4-2020-13.pdf
- DOI:
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