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Ansys Learning Forum › Forums › Discuss Simulation › Electronics › Ansys HFSS transient near field data extraction › Reply To: Ansys HFSS transient near field data extraction

November 1, 2024 at 12:11 am
Irina Gordion
Ansys Employee

Hi,

my thoughts about transinet response to the design with 2 ports, say Tx and Rx antennas: it's usually better to use HFSS FEM solver in frequency domain and get S21 vs. frequency. Sometimes it's more effecient to use SBR+ or othe hybrid solver technoligies. Then one can transfer frequency response to time domein response, for example, using Circuit design in AEDT. Make sure that the freqeuncy band and frequency steps in reported frequency based S-parameter matrix is suitable for time pulse and duration of the time simulations. 

NF setup is not available in transient simulations: if it's closer to the antenna, save Field on a specific objects (plane or even a point) vs. time may fit the simulation goal. If the distance is far from antenna and in Far Field range, try to use Far Field vs. time report and estimate field as rE/R (the value of reported Far Field divided by the distance to the antenna phase center). Â