**LORENTZ-HF**, the high frequency version of LORENTZ, is an easy-to-use 3D full-wave electromagnetic simulator based on CFIE (combined-field integral equation) combined with the ability to analyze charged particle trajectories in the presence of high frequency electromagnetic fields.

It uses the Method of Moments (MoM) (or Boundary Element Method) coupled with Physical Optics found in SINGULA and is coupled with the ray tracing and powerful emission regime and secondary emission capabilities of LORENTZ.

LORENTZ-HF also calculates near and far field results, power and directive gain, radar cross-section, axial ratio, and input impedance, admittance and scattering parameters.

It is uniquely suited for early-stage simulation and resolution of the Multipactor Discharge phenomenon affecting many high power vacuum electronics device designs.

LORENTZ-HF can also be combined with electrostatics, magnetostatics and time-domain solvers for **LORENTZ-HFE**, **LORENTZ-HFM** and **LORENTZ-HFTD**.

LORENTZ-LF, the low frequency version of LORENTZ can be combined in a similar way for LORENTZ-LFE and LORENTZ-LFM.