Low noise, electric field sensor
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United States of America Patent
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Aug 8, 2006
Grant Date -
Apr 15, 2004
app pub date -
Aug 14, 2003
filing date -
Feb 13, 2001
priority date (Note) -
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Abstract
A system for measuring a free space electric field includes an ultrahigh impedance antenna positioned in the electric field to generate a signal from the electric field. An amplifier having an input port is provided to amplify the signal. The amplifier generates an input bias current which combines with the signal to create an input potential at the input port. An electrical circuit connects the input port to a ground connection and includes at least one circuit element for controlling the input potential to stabilize the signal at the input port.
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