Method for measuring a characteristic impedance and a propagatio

Details Method for measuring a characteristic impedance and a propagatio Method for measuring a characteristic impedance and a propagatio

1988-12-22

1990-02-27

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

324637, G01R 2732

Patent

active

049049275

ABSTRACT:
In a method for measuring a characteristic impedance and a propagation constant of a two-port network (2), an output port (5) of the two-port network (2) is successively terminated with at least two different finite known impedances (3a, 3b) which are independent of the two-port network (2). An input impedance (ZE1, ZE2) is measured for each residual impedance. From the termination impedances (ZA1, ZA2) of the impedances (3a, 3b) and the corresponding input impedances (ZE1, ZE2), the propagation constant and the characteristic impedance are determined.

REFERENCES:
patent: 3715667 (1973-02-01), Nicolson
patent: 3771056 (1973-11-01), Zimmerman
patent: 4156842 (1979-05-01), Huang
patent: 4463308 (1984-07-01), Underhill
patent: 4621226 (1986-11-01), Powell
patent: 4777429 (1988-10-01), Potter
Oliver: "Time Domain Reflectometry"-hp Journal-Feb. 1964, pp. 1-8.
News from Rohde & Schwarz, vol. 118, Summer 1987.
Transmission Loss--Determined by Reflection Measurement, T. Reichel, p. 21, see the whole document.

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