Method for designing compact size inductors and compact size inductor thereof

摘要

The invention refers to a method for designing a compact size inductor, which inductor is a spiral of N turns occupying a square area of DxD, D being its outer dimension, and where s is the turn-to-turn spacing, d its inner dimension, w is the constant strip-width; the compact size inductor having an equivalent inductance Leq; the method comprising the following steps:obtaining a dependency of the inductance value Leq on the minimum inductor's outer dimension Dmin and fitting a curve using a non-linear expression;the resulting compact size inductor is obtained, for a given inductance value Leq and considering fixed minimum values of the turn-to-turn spacing smin, the inner dimension dmin and the constant strip-width wmin:- obtaining a minimum outer dimension Dmin using said non-linear expression;- filling a square of DminxDmin with as many turns as possible, starting from the outside inwards, taking into account the geometrical restriction defined by: N=intDmin⁢smin⁢wmin⁢dmin.