Frequency balanced six-port reflectometer with a variable test p

Details Frequency balanced six-port reflectometer with a variable test p Frequency balanced six-port reflectometer with a variable test p

1992-03-17

1993-12-28

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

324642, 324601, 333263, G01N 2704

Patent

active

052743330

ABSTRACT:
A source of microwave power is connected to the first, input, port of a six-port device whose second, output, port is connected to a device under test. A variable impedance is connected between the source and the input port. Preferably, the variable impedance is a mechanical three stub tuner. The six-port device includes a first directional coupler whose first input comprises the input port and whose first output comprises the output port. First, second and third hybrid couplers have outputs which constitute the third, fourth, fifth and sixth outputs of the six-port device. A power divider connects the directional coupler to the hybrid couplers.

REFERENCES:
patent: Re25396 (1963-06-01), Weinschel
patent: 4616120 (1986-10-01), Maruyama
patent: 5041803 (1991-08-01), Shindhara
"The Six-Port Reflectometer: An Alternative Network Analyzer", Glenn F. Engen, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-25, No. 12, Dec. 1977, pp. 1075-1079.
"Calibrating The Six-Port Reflectometer by Means of Sliding Terminations", Glenn F. Engen, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-26, No. 12, Dec. 1978, pp. 951-957.
"A Six-Port Network Analyzer Load-Pull System for Active Load Tuning", F. M. Ghannouchi et al, IEEE Transactions on Instrumentation and Measurement, vol. 39, No. 4, Aug. 1990, pp. 628-631.
"An Improved Circuit for Implementing the Six-Port Technique of Microwave Measurements", Glenn F. Engen, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-25, No. 12, Dec. 1977, pp. 1080-1083.

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