Patent ID: 6404306
Filing Date: 2002-06-11
Classification: H01P

Abstract:
A block filter comprising:a block of dielectric material having a top surface, a bottom surface, two opposing side-walls connecting said top surface to said bottom surface along the width of said block and two opposing side-walls connecting said top surface to said bottom surface along the height of said block, wherein said bottom surface and side walls are substantially covered with conductive material; at least two holes extending through said dielectric material from said top surface to said bottom surface, wherein the inner surface of said holes are substantially covered with conductive material; conductive material layered on said top surface in a geometrical pattern such that the combination of said at least two holes and said pattern of conductive material form an equivalent electrical circuit having capacitance and inductance which when subjected to a power source has a frequency response within a desired bandpass; a pattern of conductive material on said top surface, said conductive material being electrically grounded and arranged in a pattern so as to form an area of dielectric material on said top surface, said area of dielectric material having a geometry and dimensions so as to attenuate the frequency response of said block filter which is above said bandpass; and said area of dielectric material is rectangular in geometry, and surrounded from all sides by electrically grounded conductive material.