hfss边界与端口设置.pdf

边界与端口设置 电子科技大学 贾宝富 博士 2-1 HFSS Boundary List ? Perfect E and Perfect H/Natural ? Ideal Electrically or Magnetically Conducting Boundaries ? ‘Natural’ denotes Perfect E ‘cancellation’ behavior ? Finite Conductivity ? Lossy Electrically Conducting Boundary, with user-provided conductivity and permeability ? Impedance ? Used for simulating ‘thin film resistor’ materials, with user-provided resistance and reactance in ?/Square ? Radiation ? An ‘absorbing boundary condition,’ used at the periphery of a project in which radiation is expected such as an antenna structure ? Symmetry ? A boundary which enables modeling of only a sub-section of a structure in which field symmetry behavior is assured. ? “Perfect E” and “Perfect H” subcategories ? Master and Slave ? ‘Linked’ boundary conditions for unit-cell studies of infinitely replicating geometry (e.g. a slow wave circuit an antenna array) 2-2 HFSS Boundary Descriptions: Perfect E and Perfect H/Natural r E perpendicular ? Parameters: None ? Perfect E is a perfect electrical conductor* ? Forces E-field perpendicular to the surface Perfect E Boundary* ? Represent metal surfaces, ground planes, ideal cavity walls, etc. r E parallel ? Perfect H is a perfect magnetic conductor ? Forces H-field perpendicular to surface, E- Perfect H Boundary field tangential r ? Does not exist in the real world, but E continuous represents useful boundary constraint for