Accession Number : ADD006685

Title :   Immitance Measurement with High Frequency Injection and Electromagnetic Coupling.

Descriptive Note : Patent,


Personal Author(s) : Huang ,Kwang Ta ; Brooks ,James L ; Shiroma,Dallas M

Report Date : 29 May 1979

Pagination or Media Count : 13

Abstract : A system for measuring the transfer immitances, impedance and admittance, of a linear electrical network having one or more ports. The system utilizes clamp-on ferromagnetic cores to electromagnetically couple the transfer immitance measuring system to the electrical network without having to interrupt the normal on-line operation of the electrical network. A high frequency injection network, which includes a high frequency signal generator and a multichannel amplifier, injects a high frequency signal into each of the ports of the electrical network. High frequency voltage and current measuring networks are electromagnetically coupled to each of the ports of the electrical network to measure the high frequency component of the port voltage and the port current. By adjusting the relative amplitude and phase of each of the injected high frequency signals, open-and closed-circuit conditions, in the high frequency range, can be simulated in the ports of the electrical network, permitting the transfer immitances of the electrical network to be established without interrupting normal, on-line operation. (Author)

Descriptors :   *Patents, *Electrical networks, Transmission lines, Electrical impedance, Admittance, Coupling(Interaction), Circuits

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE