Effects of shielding structures on the performance of planar inductors

摘要

The aim of this work is the study of the performance of planar inductors due to the presence of shielding structures. Equivalent inductance, quality factor and self resonance of the component are chosen as figures of merit for a fair comparison. Two experiments are proposed. In the first one, identical inductor geometries are evaluated under three different electromagnetic boundary conditions:(i) as a stand-alone device, (ii) surrounded by a guard-ring structure, and (iii) adding a ground plane connected to the guard-ring with solid through vias. In the second one, the influence of the width of the guard-ring is studied. Experimental results are compared with a fast quasi-static partial element equivalent circuit (PEEC) solver, which is embedded in a circuit simulator, that can handle all the previous shielding conditions.