If you only want a quick design over a predefined modelyou should try Antenna Magus. The volatge used is 1 and input impedence is 50 ohm. I think that FEKO and CST Microwave Studio are the most powerful software tools in the design of antennas. So, in comsol, I am using lumped port as shown in attached file. I don't know where is wave port in comsol. As you can see in the diagrams, the wave port is somewhat floating in the air. The only difference that i can see in both the models is this wave port used in CST, shown in the attached file. However, in comsol its very different (S11= -15dB, directivity spread all side). Just to highlight again:- My problem is, i am using the same parameters to model an antenna in comsol and CST, the results (S11 = -20dB, directivity in particular direction) obtained in CST are good. I have attached the microstrip patch antenna model made in comsol and CST below. I have looked around application library of comsol multiphysics but all the examples there are using either lumped port or port boundary condition for exciting the antenna. Could you please guide me in where i can see these (boundary mode calculations) examples?
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