Patent ID: 6590478
Filing Date: 2003-07-08
Classification: H01P,H05K

Abstract:
An assemblage, comprising:a first stripline board including first and second ground planes, and a circuit trace lying between said first and second ground planes, said first ground plane defining a circular first electromagnetic coupling aperture, a conductive center trace lying at the center of said first coupling aperture, to thereby define, in cross-section, a first coaxial transmission line, said center trace of said first electromagnetic coupling aperture connecting by way of a plated-through via to an end of said circuit trace of said first stripline board; a second stripline board including first and second ground planes, and a circuit trace lying between said first and second ground planes of said second stripline board, said first ground plane of said second stripline board defining a circular second electromagnetic coupling aperture and a conductive center trace at the center of said second electromagnetic coupling aperture, to thereby define, in cross-section, a second coaxial transmission line essentially identical to said first coaxial transmission line, said center trace of said second electromagnetic coupling aperture connecting by way of a plated-through via to an end of said circuit trace of said second stripline board; a separator defining two parallel planar surfaces spaced from each other by a predetermined distance, said separator defining a circular through aperture extending between said parallel planar surfaces, said through aperture being larger in diameter than said first and second electromagnetic coupling apertures, said separator being physically fastened to said first and second stripline boards so that said through aperture is concentric with said first and second electromagnetic coupling apertures; and an axially compliant third coaxial transmission line insert including a center conductor coaxial with an outer conductor but not in electrical contact therewith, at least one of said center conductor and said outer conductor of said third coaxial transmission line being in the form of a conductive ladder-shaped spring structure defining a plurality of rungs extending between elongated parallel conductive members, said elongated members having a circular configuration such that said rungs lie generally parallel with each other and with an axis of the other one of said center conductor and said outer conductor, said axially compliant third coaxial transmission line lying within said through aperture with a first end of said center conductor abutting said center trace of said first coaxial transmission line and a second end of said center conductor abutting said center trace of said second coaxial transmission line, and with a first end of said outer conductor of said coaxial third transmission line abutting said first ground plane of said first stripline board in a region surrounding said through aperture of said first stripline board, and with a second end of said outer conductor of said coaxial third transmission line abutting said first ground plane of said second stripline board in a region surrounding said through aperture of said second stripline board.