Optimizing Planar Inductors

摘要

A numerical simulation program, QvalueC, was developed for the design of planarinductors on lossy substrates in two-dimensional geometry. Integral equations are used for the estimation of the overall impedance of a circular inductor at a given frequency. The program computes the current density distribution in the wire has a finite electric conductivity. This so called magnetic computation gives the series inductance and series resistance of the coil. By using Green functions, integral equations are derived for equivalent surface charges that represent the conductor in the electric problem. From the surface charges the parallel capacitance and the parallel resistance are obtained. The code is written with the view to designing planar coils in four dielectric layers, but also solenois with multilayered conductors can be computed.