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US 5,206,600 AGranted
Impedance determining apparatus using quadrature current and peak detectors
AssigneeHarris Corporation
InventorRichard H. Moehlmann
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Abstract
A system and method for determining the complex impedance of a load, such as an antenna in an RF transmission system. The system samples both the voltage and current of the signal passing through a transmission line and directly derives digitally the impedance parameters independently of the amplitude or phase of the signal.
Claims1
A system to compute the parameters of a complex load impedance comprising:
- a signal source;
- a load;
- a transmission path for transmitting an RF signal from said signal source to said load;
- quadrature current samplers for providing measures of the current in the RF signal;
- a voltage sampler for providing a measure of the voltage in the RF signal;
- plural peak detectors to detect the peak of the measures of current and voltage;
- analog to digital converters to convert the signals output from the peak detectors to digital signals;
- a digital computational unit to compute the parameters of the impedance of the load from the digital signals and from a signal indicating the frequency of said RF signal sources.
5 more elements
Dependencies are inferred from the claim text.