Patent ID: 6313721
Filing Date: 2001-11-06
Classification: H01P

Abstract:
A 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;at least three holes extending through said block of dielectric material from said top surface to said bottom surface, at least one of said three holes positioned along said top surface of said dielectric material such that the center of all of said holes do not lie on a single straight line, said at least three holes spaced one from the other so as to achieve a bandpass characteristic similar to a conventional filter with at least one more hole than said at least three holes, wherein the center of each of said holes of said conventional filter lie substantially on a single straight line; andconductive material substantially covering said bottom surface, side-wall surfaces and inner surfaces of said at least three holes.