Patent ID: 6946927
Filing Date: 2005-09-20
Classification: H01P

Abstract:
1. A suspended substrate coupler comprising: a housing; a dielectric substrate suspended in said housing, said substrate having a topside and a bottom side; a first transmission line disposed on said topside of said substrate; a second transmission line disposed on said bottom side of said substrate; a first plurality of spaced stubs disposed along and extending from first and second sides of said first transmission line; a second plurality of spaced stubs disposed along and extending from first and second sides of said second transmission line; a first plurality of grounded stubs disposed on said bottom side of said substrate, each of said grounded stubs being aligned with a corresponding one of said spaced stubs in said first transmission line on said topside of said substrate, whereby said first plurality of spaced stubs and said first plurality of said grounded stubs form a first plurality of coupling capacitors for said first transmission line; and a second plurality of grounded stubs disposed on said topside of said substrate, each of said grounded stubs being aligned with a corresponding one of said spaced stubs in said second transmission line on said bottom side of said substrate, whereby said second plurality of spaced stubs and said second plurality of said grounded stubs form a second plurality of coupling capacitors for said second transmission line, said first and second plurality of coupling capacitors serving to improve mode velocity matching in said coupler.