Gigahertz frequency band inductors with magnetic films and gigahertz circuit analysis including inductance

The design and equivalent circuit of an inductor with a ferromagnetic film is described. High-frequency circuit simulation including inductance is carried out by two methods: 1) a SPICE-based simulation in which the distributed linear circuit is converted into a GCRL equivalent circuit and 2) an harmonic balance method in which the nonlinear active part of the circuit is solved in terms of sinusoidal harmonics in the frequency domain. High-frequency circuits including inductors and active elements such as low noise amplifiers are analyzed by these methods.