HFSS15: Quantity Command

E

The electric field, E

H

The magnetic field, H

Jvol

The volume current density, J_vol

Jsurf

The surface current density, J_surf

Poynting

The Poynting vector, defined as 0.5E x H*

LocalSAR

The local Specific Absorption Rate

AverageSAR

The average Specific Absorption Rate

Certification SAR

IEEE standard Specific Absorption Rate certification number.

To calculate certification SAR on a specific object (rather than the whole model) proceed as follows:

1. In the Calculator Input area, click the Quantity button and select Certification SAR.

Certification SAR is displayed in the calculator stack.

2. In the Calculator, click the Geometry button to display the Geometry dialog.

The Geometry dialog displays with the Volume radio button selected, and the available geometries listed.

3. Select the Geometry of interest.

This enables the OK button.

4. Click the OK button.

5. This adds the selected Volume geometry to the calculator stack.

6. In the Calculator Output area, press the Value button

This prepares the calculation for the selected quantity and volume.

7. Press the Eval button to evaluate.

Both the value and location will be shown on the calculator stack.

SurfaceLossDensity

This contains the surface impedance (if any) loss at every node in every triangle. This is calculated as:

where p_s is the surface impedance loss density, S is the Poynting vector on the boundary, and n is the out unit normal of the boundary.

To export a REG file containing the surface loss density, place the SurfaceLossDensity in the top register and use the Write... command, selecting Reg format.

VolumeLossDensity

The volume loss density p is calculated as:

where E is the electric field, is the conjugate of the volumentric current density, B is the magnetic flux density, and is the conjugate of the magnetic field.

To export a Reg file containing the volume loss density, place the VolumeLossDensity into the top register, and use the Write....command, selecting the Reg format.

Displacement

This is value is for use with Workbench when exploring stress feedback.