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Variable Termination Unit for Noise-Parameter Measurement

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3 Author(s)
Dazhen Gu ; Electromagn. Div., Nat. Inst. of Stand. & Technol., Boulder, CO ; Walker, D.K. ; Randa, J.

The National Institute of Standards and Technology (NIST) has upgraded its capability to measure noise parameters on low-noise amplifiers with a variable termination unit (VTU) in the frequency range of 1-12.4 GHz. Such a unit allows improved time efficiency and accuracy in the noise-temperature measurements used to de-embed the noise parameters of amplifiers. We present the design and characterization of the VTU. The measured results of one particular amplifier at integer frequencies ranging from 8 to 12 GHz show satisfactory accuracy. The VTU method is also validated by comparison with the results from the manual method.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:58 ,  Issue: 4 )