Six-port reflectometer

Details Six-port reflectometer Six-port reflectometer

1985-04-25

1987-02-03

Gensler, Paul

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

333109, 333114, G01R 2706

Patent

active

046410821

ABSTRACT:
A six-port reflectometer has first and second directional couplers, a first waveguide and a third directional coupler providing a series connection from a source to a test device. The first coupler is connected to two detectors. The second coupler is connected to a third detector and to a fourth waveguide having two ports connected via a waveguide and a further port connected to an absorber. The third coupler is connected to a detector and a reflector. The second waveguide and the reflector receive radiation coupled by the second and third couplers respectively. The third and fourth couplers provide equivalent transmission paths. Equal path lengths are traversed by signals leaving the second coupler and returning to it from the reflector and the fourth coupler respectively. With broad-band couplers and waveguides, this arrangement gives broad-band performance.

REFERENCES:
patent: 4489271 (1984-12-01), Riblet
patent: 4571545 (1986-02-01), Griffin et al.
Engen, The Six-Port Reflectometer: An Alternative Network Analyzer, IEEE Trans. on MTT, vol. MTT-25, No. 12, Dec. 1977.
Griffin, Six-Port Reflectometer Circuit Comprising Three Directional Couplers, Electronics Letters, 10th Jun. 1982, vol. 18, No. 12, pp. 491-493.

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