Ground plane isolation of planar inductors using a magnetic disk

Details Ground plane isolation of planar inductors using a magnetic disk Ground plane isolation of planar inductors using a magnetic disk

1997-11-21

1999-08-17

Gellner, Michael L.

Inductor devices

Coils of special configuration

Planar type

336200, 336223, H01F 500, H01F 2728

Patent

active

059399678

ABSTRACT:
An approach that minimizes ground plane effects affecting planar inductors is disclosed. A magnetic disk is inserted between an inductor and a ground plane to isolate the magnetic field of the inductor and preserve its magnetic characteristics. The present invention isolates the inductor from the ground plane to maintain or improve inductor electrical performance. The magnetic material serves to increase the inductance to its original value (prior to adding the ground plane) with only a slight degradation in Q due to an increase in AC resistance. This approach permits development of higher current, higher power printed networks, components and circuits whose circuit designs have decreased volume, weight, and cost.

REFERENCES:
patent: 5075650 (1991-12-01), Okamura et al.
patent: 5250923 (1993-10-01), Ushiro et al.

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