Patent ID: 6465730
Filing Date: 2002-10-15
Classification: H01L,H01Q,Y10T

Abstract:
A short-circuited transmission line, comprising:a monolithic, electrically conductive structure including (a) a solid center conductor having a circular cross-section about a central axis, said center conductor terminating at a first plane and having a first diameter at said first plane transverse to said central axis, and a second diameter, greater than said first diameter, at a second plane parallel to said first plane, said diameter of said center conductor tapering monotonically between said first and second diameters, and the length of said center conductor being defined by the separation of said first and second planes; (b) a plurality of mutually identical solid outer conductors, each one of said outer conductors having a circular cross-section about a longitudinal axis, said longitudinal axis of each of said outer conductors being parallel with said central axis of said center conductor, and each of said outer conductors terminating at said first plane and having a third diameter at said first plane, and a fourth diameter, greater than said third diameter, at said second plane, said diameter of said outer conductors tapering monotonically between said first and second diameters, and said plurality of outer conductors having said longitudinal axes equally spaced from each other at radii which make equal angles with adjacent radii; (c) a solid short-circuiting plate interconnecting said center conductor and said outer conductors at said second plane; and a disk-like dielectric insulator defining a central axis coincident with said central axis of said center conductor, a thickness sufficient to enclose that portion of said center and outer conductors lying between said first and second planes, and a periphery defined, at least in part, by a radius from said central axis greater than the sum of (a) one of said radii plus (b) half of the greater of (i) said second diameter and (ii) said fourth diameter, said insulator surrounding at least portions of said center and outer conductors, for insulating said center conductor from said outer conductors and said outer conductors from each other, except at said short-circuiting plate.