GHz magnetic film inductors

Use of magnetic films for miniaturization of planar inductors operating at ultra-high frequencies is reviewed. Materials and design aspects determinin g the efficiency of the devices are analyzed. Mechanisms involved in magnet ic dissipation and their role in limiting the device operation frequency ra nge and quality factor are discussed. Typical inductor geometries are consi dered. A magnetically sandwiched strip inductor is argued to hold a promise for GHz applications. (C) 2000 Elsevier Science B.V. All rights reserved.