Patent ID: 6369324
Filing Date: 2002-04-09
Classification: H01L,H01P

Abstract:
A high-frequency input/output feedthrough, comprising:a dielectric substrate having a ground conductor on a bottom surface thereof; a wall member of a dielectric or conductive material joined to a top surface of the dielectric substrate protruding above the top surface, at least a portion of the wall member defining a recess; a first line conductor and a second line conductor formed on the top surface of the dielectric substrate in line with each other, each line conductor having a wall member adjacent end so that the line conductors are separated by a portion of the wall member; an inside-layer line conductor formed within the dielectric substrate, in line with the first and second line conductors and passing beneath the wall member; and through connectors at a first end and at a second end of the inside-layer line conductor electrically connected to respective wall member adjacent ends of the first and the second line conductors with a distance between the through conductors set to be a quarter of a wavelength of a high-frequency signal to be used, wherein the recess extends along the surface of the wall member in a direction normal to the top surface of the substrate, and wherein the wall member adjacent ends are at least partially in the recess, such that the portion of the wall member separating the wall member adjacent ends of the line conductors has a thickness that is less than a thickness of portions of the wall member not separating the wall member adjacent ends of the line conductors.