Method and apparatus for testing the output reflection coefficie

Details Method and apparatus for testing the output reflection coefficie Method and apparatus for testing the output reflection coefficie

1980-07-14

1982-11-16

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

364481, G01R 2704

Patent

active

043596827

ABSTRACT:
A method is disclosed for measuring the absolute value of the reflection coefficient between a transmission line of known characteristic impedance and the output port of an automatic level controlled source (i.e., ALC source). The ALC source is activated and a signal source is coupled to the output port of the ALC source via the transmission line to apply a test signal of amplitude V.sub.t to perturb the output signal of the ALC source. The magnitude of the amplitude modulation component of the resulting perturbed output signal is detected for use in combination with the value of V.sub.t in calculating the absolute value of the reflection coefficient. An apparatus is also disclosed for applying measuring the absolute value of the reflection coefficient. Alternatively, an on-carrier test signal is employed to perturb the output signal. The magnitude of variation of the amplitude of the output signal, as the phase of the test signal is varied, is determined for use in calculating the absolute value of the reflection coefficient.

REFERENCES:
patent: 2876416 (1959-03-01), Vinding
patent: 3355663 (1967-11-01), Aronoff

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