Patent ID: 8193880
Filing Date: 2012-06-05
Classification: H01P,H05K

Abstract:
1. A device comprising: a substrate; a coplanar waveguide in a first layer over the substrate, the coplanar waveguide having a length and comprising: a dielectric layer between the substrate and the coplanar waveguide; wherein the coplanar waveguide has a first transverse cross-section that varies over its length; wherein the first and second ground lines respectively have second and third transverse cross-sections that are uniform over their lengths; wherein the signal line comprises periodically alternating first and second segments, the first segment being wider than the second segment; and wherein a first distance between the signal line and the first ground line varies along the length of the coplanar waveguide, a second distance between the signal line and the second ground line varies along the length of the coplanar waveguide, and the first distance is equal to the second distance at each point along the length of the coplanar waveguide.