Methods for establishing the complex measuring capacity of homod

Details Methods for establishing the complex measuring capacity of homod Methods for establishing the complex measuring capacity of homod

1990-04-09

1992-03-17

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Calibration

324638, 324642, G01R 2704

Patent

active

050972154

ABSTRACT:
Methods for establishing the complex measuring capability of homodyne operating network analyzers. Single port as well as two-port measuring devices are treated in which the signal detection takes place by means of a linear mixing process. It is possible to overcome the disadvantage of the homodyne detection process, which does not directly supply information relating to the amplitude and phase of the measurement signal, by measuring arbitrary unknown standards. The required number of different unknown standards depends, among other things, on the complexity of the measuring device used. One of the proposed methods operates without any standards at all. After weighting factors have been determined, complex measuring values can be ascertained and one can then proceed as in the case of a heterodyne network analyzer, i.e. with system error calibration measurements and finally with DUT (device under test) measurements.

REFERENCES:
patent: 4904927 (1990-02-01), Garbe et al.
patent: 4982164 (1991-01-01), Schiek et al.

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