In article ,
"c.foster" wrote:

how do you determine the impedance of an antenna?
is this something i can do with a multi-meter or is it very technical?

You can't effectively measure it with a multi-meter.

An antenna is a 3rd to 4th dimensional problem involving electric and
magnetic fields depending on its construction.

The derivation thereof are technical but there are formulae and spread
sheets that can be followed to calculate the dimensions that make it
simple at the same time.

--
Telamon
Ventura, California