How to Simulate a Equivalent Circuit of an Antenna ?

Recently, i have designed an antenna.

So what i did was using HFSS, i exported to an equivalent circuit model (lumped model) and use ADS to convert it into schematic.

So from the equivalent circuit that i have , how do i simulate the S11 ?

Sincerely,
frodonet

Go to the Simulation-S-Parameters toolbox. Add a Term(ination) block, and an S1P block (you may have to go up to the blank box in the toolbar, just type in S1P and hit Enter). Also, add an S_P controller and set it up to sweep across your frequency range. Connect the Term to the lumped element circuit and ground the other end of both networks.

After you simulate the network, a data display opens. Use the Smith Chart and plot S(1,1), or add some rectangular plots and graph real(S(1,1)), imag(S(1,1)), vswr(S(1,1)), etc.

Hey buddy, all these steps are done in ADS right?

Thanks for sharing, I will try it out and post the results.

By the way, would it make any difference if I use lumped element equivalent circuit for simulation?

You asked for a "how-to" in ADS, so the directions are for ADS (close enough that you should be able to find the elements described... I don't have it installed on this PC, so its from memory).

I guess I don't understand what you are trying to describe with ADS schematic vs. a lumped element circuit model question? If you have a bunch of R, L and C objects wired together in an ADS schematic, then you have a lumped element circuit. You could put transmission line components, RF channel model objects, transistor behavioral models and Momentum co-sim Look-Alike components into an ADS schematic, too. Lumped element typically describes the circuit's composition... generally taken to describe a simple circuit representation using only R's, L's and C's. What am I missing in your question?