Hi, I used the online synthesizer for a 50 Ohm CPW line. I simulated that on HFSS V.11. And got a 50 ohm result too. But somehow the CPW structure radiates, not sure if it was from the feeding or the structure itself. The maximum gain from the 3D polar plot was around 6 dB. The radiation box is approx lambda/3 away from the structure. I don't think this is possible because its gain is even higher than a dipole. Anyone know what the problem is?