Patent ID: 8198962

Claim:
A carrier for transmitting a high frequency signal, comprising a substrate, conducting wires and reference planes both formed on the substrate, and characterized by at least one of a conducting layer formed on the conducting wires, a coplanar waveguide that encompasses both the reference planes and the conducting wires as a part thereof, roughness portions formed on the conducting wires, recessed portions forming on the conducting wires, and the substrate being a high loss tangent substrate for increasing high frequency signal loss wherein the roughness portions satisfy equations σ c =σ/Kw 2 and Kw=1+exp(−(s/2h) 1.6 ), wherein electrical conductivity is denoted by σ, skin effect parameter is denoted by Kw, roughness by h, skin depth by s, and electrical conductivity of roughness portion by σ c .