Measuring radio-frequency impedance

Details Measuring radio-frequency impedance Measuring radio-frequency impedance

G - Physics

01

R

324/43

G01R 27/02 (2006.01) G01R 27/16 (2006.01)

Patent

CA 1126340

A B S T R A C T A method of deriving radio-frequency impedance informa- tion of an electrical network such for example as an aerial by using a current transducer to introduce a radio-frequency current into the network and a voltage transducer to impress a radio-frequency voltage on the network, applying signals from a radio-frequency source to the transducers which couple them into the network, and detecting the resul- tant signal or signals with a radio receiver by coupling the receiver to a port of the network and deriving the impedance information from the detected signal or signals. Because the receiver is directly connected to the network the applied energy is very small for example 1 nanowatt. One or more of the signals coupled into the network may be modulated.

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