Title :
Calibrated measurements and nonlinearity compensation of narrowband amplifiers
Author :
Van den Broec, Tom
Author_Institution :
Dept. ELEC, Vrije Univ., Brussels, Belgium
fDate :
12/1/1995 12:00:00 AM
Abstract :
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
Keywords :
calibration; circuit testing; compensation; feedforward; intermodulation; microwave amplifiers; microwave measurement; network analysers; calibrated measurements; calibrated sampling oscilloscope; crossmodulation; high SNR measurements; intermodulation; narrowband amplifiers; narrowband measurements; nonlinearity compensation; reference generator; upconverted baseband signal; vectorial nonlinear network analyzer; Calibration; Character generation; Frequency measurement; Kernel; Narrowband; Oscilloscopes; Phase measurement; Sampling methods; Signal generators; Signal to noise ratio;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
