Patent ID: 7336140
Filing Date: 2008-02-26
Classification: H01P

Abstract:
1. A low temperature cofired ceramic-metal (LTCC-M) integrated non-reciprocal device for directing radio frequency (RF) signals, comprising: a ferrous base plate; a plurality of LTCC-M insulating layers situated above the ferrous base plate; a ferrite disk at least partially within the plane of a first LTCC-M insulating layer of the plurality of LTCC-M insulating layers; a conductor junction having 3 ports for coupling the RF signals to the non-reciprocal device, the conductor junction situated above the ferrite disk; a permanent magnet at least partially within the plane of a second LTCC-M insulating layer of the plurality of LTCC-M insulating layers, the second LTCC-M insulating layer located above the conductor junction, wherein the ferrous base plate acts as a magnetic return path; and a third LTCC-M insulating layer of the plurality of LTCC-M insulating layers at least partially situated between the ferrite disk and the permanent magnet.