Hi,
I am trying to do transient analysis of two antipodal vivaldi antennas placed side-by-side using HFSS, to see the ability of the antenna to transmit and receive signals without distortion. I am following the procedure in the HFSS example guide of a Ridged Horn Antenna (attached herewith).
For this I have assigned perfect E boundaries to the top and bottom layers of the antipodal vivaldi. I have excited the antennas with waveports having height= substrate thickness and length= trace width of the vivaldi.
I have assigned one volt as the source magnitude for the first antenna's port and zero volt for the second, from the HFSS> fields > edit sources option, so that the first antenna works as the transmitter and the second works as the receiver.
However, I am getting the following error while attempting to run simulation: "Port refinement, process hf3d error: Too few conductors were found on port p1. There should be one conductor for each terminal, with one additional reference conductor. Unintentional contact between conductors may cause this error."
I increased the waveport size to length= 20Xtracewidth and width= 20Xsubstrate height, but still then it cannot solve. Now it says: "Port refinement, process hf3d error: Port 'p1' contacts more than one non-conducting material which violates the TEM terminal modes restriction.."
Can you suggest a way out from this. Is the process that I am following correct?
Thanks in advance.