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Calibrated measurements and nonlinearity compensation of narrowband amplifiers

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1 Author(s)
Van den Broeck, T. ; Dept. ELEC, Vrije Univ., Brussels, Belgium

A vectorial nonlinear-network analyzer (VNNA) is absolutely calibrated in amplitude and phase for narrowband measurements of nonlinearities. Calibration is performed with a reference generator, characterized with a calibrated sampling oscilloscope. The reference signal, consisting of an upconverted baseband signal, is optimized for high signal-to-noise ratio measurements. Using the calibrated VNNA, narrowband amplifiers can be measured, enabling compensation of intermodulation and crossmodulation

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:43 ,  Issue: 12 )