ANSYS HFSS

ANSYS HFSS software is the industry standard for simulating 3-D full-wave electromagnetic fields. Its gold-standard accuracy, advanced solver and compute technology have made it an essential tool for engineers designing high-frequency and high-speed electronic components.

HFSS offers multiple state-of the-art solver technologies based on finite element, integral equation or advanced hybrid methods to solve a wide range of applications. Each HFSS solver incorporates a powerful, automated solution process, so you need only to specify geometry, material properties and the desired output. From there, HFSS automatically generates an appropriate, efficient and accurate mesh for solving the problem using the selected solution technology. With HFSS, the physics defines the mesh; the mesh does not define the physics.

Two Modes of Operation

To enhance user productivity, ANSYS HFSS includes two modes of operation:

  • 3-D interface
  • HFSS for ECAD

The 3-D interface enables users to model complex 3-D geometry or import CAD geometry. Typically, the 3-D mode is used to model and simulate high-frequency components, such as antennas, RF/microwave components and biomedical devices. Engineers can extract scattering matrix parameters (S,Y, Z parameters),

visualize 3-D electromagnetic fields (near- and far-field), and generate ANSYS Full-Wave SPICE models that link to circuit simulations.

The other mode of operation is an electrical CAD interface, HFSS for ECAD, which is ideal for designers who work in layered geometry or layout of high-speed components, including on-chip embedded passives, IC packages and PCB interconnects. These types of designs can be easily modeled in HFSS’ electrical layout environment while, at the same time, simulating for all 3-D features, such as trace thickness and etching as well as bondwires, solder bumps and solder balls. Geometry such as trace width can be easily parameterized and optimized using the integrated ANSYS Optimetrics tool in the HFSS for ECAD interface. Beyond the convenient electrical layout environment, HFSS includes a fast 2.5-D planar electromagnetic solver based on the method of moments. This provides the flexibility to use a fast solver optimized for planar structures in the initial design phase, and then turn to the reliable 3-D accuracy of HFSS finite elements for optimization and design verification. Signal integrity engineers use HFSS for ECAD to integrate within established EDA design flows to evaluate signal and power quality, including transmission path losses, reflection loss from impedance mismatches, parasitic coupling, ground bounce and radiation.