Impact of Receiver Bandwidth and Nonlinearity on Noise Measurement Methods
M. Rudolph1,2 , P. Heymann2, and H. Boss3
Published in:
IEEE Microwave Mag., vol. 11, no. 6, pp. 110-121 (2010).
Abstract:
The article has dealt with problems of noise measurement located on the receiver side. The influence of noise bandwidth B and receiver gain GREC on the measured power level FNwas discussed. The digital realization of B enables a revival of the signal generator method. The need for a calibrated noise generator is eliminated and a VNA can be used a receiver. A transistor measurement shows that the linearity of the receiver is extremely important. Through the application of the cold-source method, this influence can be significantly reduced.
1 Ulrich L. Rohde Chair of RF and Microwave Techniques, Siemens-Halske-Ring 14, 03046 Cottbus, Germany
2 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
3 Rohde & Schwarz, Munich, Germany
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