> > It may require a bit of tweaking to get the
> > +/-j component tuned out, but with suitable test equipment that is
easy
> > to do.
> >
> I would like to learn more.
>=20
> I have access to signal generators, spectrum analysers with tracking
> generators and network analysers.
>=20
> I guess at resonance the load appears completely resistive and current
> is in phase with voltage.
>=20
> Therefore, my first approach would be to use a CRO with a current
> probe.  Drive the antenna with signal generator at the desired
> frequency and see how it behaves.
>=20
> However, I suspect you refer to another approach.
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> I would welcome any suggestions.
>=20
> Justin

Well, It is ages since I dealt with rf stuff, but my memories are that
you would use the network analyser to generate a smith chart style
display around the frequency you require, and then a suitable matching
network would be used to tweak out the reactive components, and may be
able to adjust the resistive value seen looking into the input side of
the network to make it suitable for the tx or rx that you are using.=20

My memories of working out Pi networks at HF type frequencies suggests
that they can, with judicious component selection, be used to raise or
lower the impedance to suit.
--=20
Scanned by iCritical.

--=20
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