How to simulate an antenna

Hi everyone. I need to simulate a circuit that has a 2.4ghz transmitter, a pair of directional antennae and a rectifying circuitry. I tried in pspice and multisim, but could not find models for antennae. Help me if anyone know about these..

pSpice may not be suitable for this type of simulations. Try ANSYS HFSS or CST MICROWAVE STUDIO - 3D EM simulation software

BTW, pSpice is a circuit-level simulator

Thanks for reply. I used EM simulation tools such as rfsim, eMgine and comsol. I find it difficult to design antenna along with the rectifying circuit that has discrete components. I hope u got my problem.

You need to simulate the antenna part and the rectifying circuit separately. I mean simulate your rectifying circuit using pspice/multisim and the antenna using rfsim/eMgine/comsol. If both the parts work perfectly, then you can integrate them.

What type of antenna are you planning to fabricate. Is it a patch antenna or a monopole ?

-sv

i want to use microstrip patch antenna. I have both emgine and multisim. Designed individually as u said. Could u explain the integration steps? I would be grateful to u if this works out :)