Port refinement ,hf3d error

hi i am using HFSSv11 simulator to designing micro strip patch antenna and i am using MS FEED LINE TECHNIQUE but when i design this structure in driven modal solution type, after validation check,it gives me wrong result with an an error message as " Port refinement ,hf3d error :Port faces have not solution inside material on either side" and this error comes after simulation. and my port is lumped port. my MS ANTENNA is 3×3 cm planar shape for 2 ghz application.please help for this error.

The error seems pretty self explanatory ;) A lumped port has to be entirely within the solution domain with meshed objects on either side of the face. If the lumped port lies on an external face of the model or with one side of the face coplanar with an object that is not solved inside (think metal) then this error will occur. I think you may have meant to use a waveport.

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