The authors have previously demonstrated that the easy direction of a single large soft magnetic film-substrate can be separated into two different directions via micro patterning of the magnetic film into bi-directional micro wire arrays. In the present work, this technique is applied to the rf integrated rectangular spiral inductors used for personal handy phone handset at 1GHz range. Hard axis excitation is essentially required for this application in order to have good permeability at 1 GHz range. The proposed technique makes it possible to utilize the 100% area of magnetic film on the spiral because hard axis excitation is possible at any part of the film. Another benefit of the micro array geometry for the rf inductors is to artificially shift the ferromagnetic resonance frequency toward higher frequency range. The physical dimension of wires and the spacing of wires determine the degree of frequency shift.
|Journal||Digests of the Intermag Conference|
|Publication status||Published - 2000 Jan 1|
|Event||2000 IEEE International Magnetics Conference-2000 IEEE INTERMAG - Toronto, Ont, Can|
Duration: 2000 Apr 9 → 2000 Apr 13
ASJC Scopus subject areas
- Electrical and Electronic Engineering