Patent ID: 6727781
Filing Date: 2004-04-27
Classification: H01L,H05K

Abstract:
A high-frequency amplifier with electromagnetic decoupling, which comprises a metal case consisting of a box container and a lid; the box container having first and second end walls, first and second side walls and a ceiling; an amplifying element installed on a dielectric board in the box container; leads connected to an input circuit and an output circuit of the amplifying element and extending outside through both the first and second end walls of the box container; and means for preventing electromagnetic coupling between the input circuit and the output circuit; the means including at least one electromagnet wave-absorbing sheet that absorbs electromagnetic waves in a frequency range of 5-13 GHz arranged inside at least one of the end walls, side walls and ceiling of the box container of the metal case, and the electromagnetic wave-absorbing sheet comprising a metal powder-dispersed sheet prepared by dispersing a soft magnetic metal material in a rubber matrix.