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Hi I am making an antenna array, I have the following questions.I have simplified the model to 3 elements for this forum purpose. My array will have parasitic (passive) element which would be terminated in 50ohms (or other loads). In order to simulate this I have added this load to the wire ports which I created on all wires. The antenna pattern depends strongly on the load. It is not clear for me that when I should use the load. In one of the examples I saw they have used the transmission lines between the ports when making antenna arrays. Should the active ports also be loaded? (loading the active elements does not change the pattern but it does change the absolute gain). and a couple of stupid questions. I have not seen using the load in any of the examples. 2-What is the difference between vertex and segment wire ports, when should we use which one? 3-Why we have to make a union of the model, otherwise FEKO solver returns an error, although it passes the CEM validate . sq_param_model_3arr_2G4.cfx