[第五课]HFSS边界条件类型

Ansys HFSS V19边界条件类型如下图： j \rGU){  

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Anisotropic impedance boundary E 1`g8Hk'  
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Planar screens or grids of large extent with periodic geometry can be replaced by an Anisotropic impedance boundary. The boundary applies a homogeneous characteristic impedance to the surface in an effort to create an equivalent electrical representation of the geometric grid pattern. For legacy designs, this boundary replaces the Screening Impedance boundary. lI46 f  

Aperture boundary q~18JB4WPJ  
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An aperture boundary represents a hole in a metallic sheet.An aperture boundary can only be assigned on a 2D sheet object assigned as IE Region. These objects will be meshed as part of the solution process. e7iQG@i7  

Finite conductivity boundary RY,L'GtO  
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A finite conductivity boundary the behavior of the field at the object surface. The finite conductivity boundary is valid only if the conductor being modeled is a good conductor, that is, if the conductor's thickness is much larger than the skin depth in the given frequency range. -
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Half Space boundary UXS+GAWU  
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The Half Space boundary is designed for solving antenna and scattering problems with a background comprising a dielectric half space. The Half Space boundary splits the background material along a z=constant plane. The antenna or scatterer can be located in the top medium (for example, air) or the bottom medium (for example, sea water) or embedded in both. Half space boundary is only available to an HFSS design when all the geometry objects are IE region. An HFSS design can only have one half space boundary. You do not select an object to assign a Half Space boundary. J B  !Q  

Impedance boundary EYKV}`  
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An impedance boundary (IB) represents a resistive surface. The behavior of the field at the surface and the losses generated by the currents flowing inside the resistor are computed using analytical formulae. ANSYS Electronics Desktop does not simulate any fields inside the resistor. bX&=*L+h6  

Layered impedance boundary K0]42K  
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A layered impedance boundary is used to model multiple thin layers in a structure as one impedance surface. The effect is the same as an impedance boundary condition, except that ANSYS Electronics Desktop calculates the impedance of the surface based on data you enter for the layered structure. Surface roughness is also taken into account. Materials with thermal modifiers are permitted have to layered impedance boundaries assigned. The layered impedance boundary is supported for single-frequency solutions and for Discrete and Interpolating frequency sweeps. ~-o[v-\  
If the layered structure is within the 3D model, meshing thin layers and solving inside is inefficient, you can replace the highly conductive thin layer by a shell element. The Shell Element option only applies to HFSS Driven solution types and does not apply to HFSS Eigenmode and Transient solution types or to HFSS-IE designs. Examples uses include simulation of an antenna inside a car chassis when the chassis is modeled using sheets or an antenna inside a dielectric radome when the radome is modeled using sheets. Shell elements maintain two sets of unknown coefficients for the top and bottom surface. #>dj!33  

Linked Impedance boundary T1#r>3c\  

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A linked Impedance boundary can be an isotropic or anisotropic impedance boundary in another design. Planar screens or grids of large extent with periodic geometry can be replaced by an Anisotropic impedance boundary. The boundary applies a homogeneous characteristic impedance to the surface in an effort to create an equivalent electrical representation of the geometric grid pattern. The link boundary can use an infinite ground plane and shell elements. d=d*:<Zx  

Lumped RLC boundary >#VNA^+t  
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A lumped RLC boundary represents a parallel combination of lumped resistor, inductor, and/or capacitor applied to a surface. Multiple RLC boundaries can be used to model other circuit configurations. For example, a lumped RLC serial circuit connection can be modeled with three connected RLC surfaces: one with only resistance, one with only inductance, and one with only capacitance. Z C<+BKS  

Master and slave boundaries  +IO>%  
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Master and slave boundaries enable you to model planes of periodicity where the E-field at every point on the slave boundary surface is forced to match the E-field of every corresponding point on the master boundary surface to within a phase difference. The transformation used to map the E-field from the master to the slave is determined by specifying a coordinate system on both the master and slave boundaries. \ 'Va(}v