NEC-LIST:Multiple port excitation

I am working an a crossed dipole antenna, and am having problems with
the two port voltage excitation.

The question is how should I excite and load these two ports?

The load Z that the antennas will be attached to a two port load that a
complex Z.

I want to make the two antenna feed points a conjugate match to this two
port load.

Here are some of the loading and exciting schemes I have tried.

DO not load either port, Excite one port with a elementary voltage
source... and adjust antenna to get match to load. Repeat for other port.

DO not load either port, Excite both ports with a elementary voltage
source with a 90 deg phase difference ... adjust antenna to get match
to load on both ports....

Load the one excited port with the imaginary part of the load Z, Load
the non-excited port with the full load Z. Adjust antenna until excited
port Z shows a purely real component that is twice the Load. Repeat for
other port (Note this method shows low efficiency due to power lost in
the real part of the load)

Load both ports with the expected Load Z, and excite one port. Adjust
antenna until excited port Z shows a purely real component that is twice
the Load. Repeat for other port (Note this method shows low efficiency
due to power lost in the real part of the load)

Fully load and excite each port 90 deg out of phase.

The point is that I am getting allot of nonsense simulations.

Each port is in effect a separate receiver, and must be evaluated
independently , yet take into consideration the interaction with the
other dipole that is terminated into it's own load.

Perhaps a CP plane wave excitation would be better?

Any suggestions?

Wayne Shanks

D

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