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Yes, It is possible, of course. You can use lumped port, either voltage or current exitation, and observe another, to get impedance.

Regards,

The lumped port is good if you don't want to spend time creating your feed network (like creating and defining a coax feed and probe to feed a patch antenna), so you just put a lumped port between the feedpoint location on the antenna and the ground plane.

This is good for a first-pass design of the antenna, but it ignores the real geometry of the feed, which might have some parasitic capacitance or inductance that you need to consider for a very accurate design.

When you use the coax feed for your model, you have a TEM transmission line with a clearly defined Zo, which is a lot easier to match up to measurements later. And it's a more accurate representation of your model with the real feed.

As we simulate models at higher and higher frequencies, we risk adding large discontinuities to the problem with lumped ports that don't really exist in practice.

--Max

thank you for your positive reply,
but I could not understand clearly. could you please explain clearly, how should I define lumped port or voltage drop or current excitation to measure input impedance for example in this structure ???

thank you for your positive reply,
but I could not understand clearly. could you please explain clearly, how should I define lumped port or voltage drop or current excitation to measure input impedance for example in this structure ???