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Article | REF: R452 V1

Measurement of radio frequency noise factors and parameters

Author: Daniel PASQUET

Publication date: June 10, 2012

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4. Two temperature or Y factor method

4.1 Measurement principle

When a dipole is placed at the input of a quadrupole, which can be brought to two different temperatures T 1 and T 2 (without changing its Thévenin impedance), the following two equations are obtained [E 1 308] :

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Two temperature or Y factor method
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