[TowerTalk] Antenna loads for bench testing
n0tt1 at juno.com
n0tt1 at juno.com
Fri Feb 15 17:01:16 EST 2019
Hi Gents,
Phased arrays and other multi-element antennas usually have a
"negative" input resistance on at least one of the elements like the
reflector.
The negative resistance is the "real" part of the impedance.
It means that power is being delivered back into the array from that
element.
The question is, if a builder wants to make "loads" for bench testing
(to simulate the actual antenna feed point impedances), how is the
negative
load resistance simulated? If there is, say an impedance of -27 + j3.0
Ohms,
does the builder just ignore the negative sign of the resistive part of
the load
and use a 27 Ohm resistor in series with the required amount of inductive
reactance or what?
Thanks,
Charlie, N0TT
More information about the TowerTalk
mailing list