Method and a six port network for use in determining complex ref

Details Method and a six port network for use in determining complex ref Method and a six port network for use in determining complex ref

1982-08-23

1985-06-04

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 585R, G01R 2704

Patent

active

045217289

ABSTRACT:
A six port network for use in determining a complex reflection coefficient associated with a microwave network. A directional coupler is connected between first and second ports of the six port network for transmitting microwave energy from a microwave source connected to the first port, to the microwave network connected to the second port. This coupler provides two signals respectively representative of the microwave energy supplied to the first port, and of the transmitted microwave energy reflected at the microwave network. The six port network further comprises a microwave circuit for producing from the two representative signals, four microwave power readings respectively associated with third, fourth, fifth and sixth ports of the six port network and proportional to .vertline.a.vertline..sup.2, .vertline.1+.alpha.e.sup.j.phi. .GAMMA..vertline..sup.2, .vertline.1+.alpha.e.sup.j(.phi.+120.degree.) .GAMMA..vertline..sup.2 and .vertline.1+.alpha.e.sup.j(.phi.-120.degree.) .GAMMA..vertline..sup.2 respectively, wherein .GAMMA. is the complex reflection coefficient, .alpha. is a constant representing a calibrated parameter of the six port network, .phi. is an arbitrary phase angle and <<a>> is the amplitude of the microwave signal supplied to the first port. The six port network may be used as an intelligent reflectometer and in a computer aided measurement system.

REFERENCES:
patent: 4104583 (1978-08-01), Engen
Hoer: "A Network Analyzer Incorporating Two Six-Port Reflectometers", IEEE Trans. on MTT--vol. 25--No. 12--pp. 1070-1074, Dec. 1977.

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