"Usually, the Radiation Boundary Condition (ABC):
• Absorption achieved via 2nd order radiation boundary
• Place at least λ/4 from strongly radiating structure
• Place at least λ/10 from weakly radiating structure
• The radiation boundary will reflect varying amounts of energy depending on the incidence angle. The best performance is achieved at normal incidence. Avoid angles greater then ~30 degrees."
1. What can be the extended size (the frequency corresponding to the λ to be chosen) of the radiation box in HFSS, for a
i) resonant/narrow band antenna?
ii) wideband and UWB antenna?
iii) Multiband antenna?
2. What is the strongly radiating surface and weakly radiating surface for a patch antenna structure?
3. Is there any relation between the freq. corresponding to the λ, solution frequency and start and stop sweep frequencies?