Original poster: "Steve Conner" <steve.conner@xxxxxxxxxxx>
Hi all,
I was just thinking about ways of measuring the output voltage of a coil.
E-field probes like Terry's planar antenna are a nice solution but the
problem is how to calibrate them. It struck me that if you were to use a
probe with an easily modelled geometry (a small toroid or sphere?) then the
calibration could be done using a finite element modelling program like
FANTC.
All you would need to do is have the program calculate the capacitance
between your coil's topload (plus some fraction of the secondary self-
capacitance I suppose?) and the probe. The division ratio of the probe is
approximately (capacitance between probe and coil)/(capacitance between
probe and ground including cable and scope input cap)