What is Low Frequency Electromagnetics?
Low Frequency Electromagnetics can be either a static or quasi-static approximation of High Frequency electromagnetics. LF electromagnetic simulations solve simplified forms of Maxwell’s equations (e.g. neglecting displacement current). The approximations are true for situations when the working frequency is either, zero (statics) or, when the wavelength is much larger than the geometric dimensions of structure. There is no definite cross over frequency between LF and HF, considering a solid conductor, at static or low frequencies the current flows in the bulk of the material, but as the frequency increases the current travels closer to the conductors surface and into the surrounding dielectric region. At high frequencies, such as microwave, only a small fraction of the energy travels in the volume of the conductor. At this stage the conductor is often referred to as a waveguide. It is technically more rigorous to define LF Emag as either Static or Quasi-static.
