XFdtd Release 7.10.1

This release allows users to include bands with an FDTD simulation, as well as specify a number of steady-state data samples to collect across a band. Users can choose from a library of commonly used, pre-defined frequency bands, or add a new band with customized specifications.

XF's create FDTD simulation window supports new syntax for specifying multiple steady-state frequencies:

• [start-value : end-value : increment]
• {start-value : increment : count}
• <start-value : end-value : count>

Users can find details about these two updates on Remcom's support site.

SAR Post-Processing

The average specific-absorption rate (SAR) algorithms are decoupled from the FDTD simulation for accessibility during post-processing. The S-parameters tab of the create FDTD simulation window provides options for SAR averaging and applying a circuit simulation during post-processing includes a setting that computes the average SAR.

These updates allows users to avoid re-running a full FDTD simulation while computing averaged SAR with a matching network, and enable a VOP compression workflow with MRI design.

Schematic Editor Updates

This release improves XF's schematic capability with multiple updates within its editor. Additional transmission line components, such as a microstrip line, microstrip step, microstrip tee, and microstrip bend, provide more accurate models, and an editable substrate list allows users to define individual substrates and specify which ones are available for use by transmission line components.

This updated functionality also supports an equation-based RLC component that mimics XF's CEO capability with increased flexability. Users can select the desired topology, choose a primary element, and define a component's behavior by editing it's associated equation.

Enhanced voltage source settings allow users to define a port number for labeling results and specify whether a source is active or inactive. The switch editor contains an editable field for either capacitance or resistance when the switch state is specified as open or closed, respectively.

Additionally, users can re-name the default operating mode, and navigate the operating mode list using the search functionality.

IEC/IEEE Standards

XFdtd 7.10.1 is compliant with and passes all tests outlined in the international standards determined by the International Electrotechnical Commission (IEC) and the Institute of Electrical and Electronics Engineers (IEEE).

• IEC/IEEE 62704-1 specific absorption rate (SAR).
• IEC/IEEE 63195-2 incident power density.