Hello, <\/p>\n
I am working on designing and characterizing a Reconfigurable Intelligent Surface (RIS). I am using Ansys HFSS to design and simulate the array and am currently trying to validate my process by comparing the results of the Antenna Array Setup (using a codebook file)<\/strong> against a manually created homogeneous finite array (with variable unit cell patch dimensions) with a feed antenna<\/strong>.<\/p>\n However, the radiation patterns \/ beamforming results from these two methods do not match in my current setup. I would appreciate your insights on whether my simulation methodology is correct or if I am missing critical configuration steps.<\/p>\n <\/p>\n The simulation process is like this:<\/p>\n 1. First I create one unit cell with primary\/secondary boundary, and assign floquet port and apply de-embedding to place the port at unit cell face.<\/p>\n 2. I sweep the patch dimensions and get the S11 magnitude and phase. I take Phases of all dimension combinations at 10 GHz frequency (operation frequency of the RIS) and make a phase vs dimension lookup table.<\/p>\n 3. Based on the required phase distribution for a target beam direction (e.g., θ = 30°, φ = 0°), appropriate patch dimensions are selected.<\/p>\n 4. Then create the array manually. Add feed antenna and radiation boundary and complete simulation.<\/p>\n <\/p>\n