Patent ID: 7545243

Claim:
A galvanic isolation mechanism for a planar circuit, said planar circuit formed on a two sided substrate, said galvanic isolation mechanism comprising: a process line formed on one side of the substrate; a circuit line formed on the same side of the substrate as said process line; a DC isolation component formed on the same side of the substrate as said process line, said DC isolation component coupled to one end of said process line and to one end of said circuit line, said DC isolation component providing a block for DC signals between said process line and said circuit line; a ground plane, said ground plane formed on the other side of the substrate, said ground plane underlying at least a portion of said process line and said circuit line; wherein the process line comprises a coplanar waveguide and the circuit line comprises a microstrip line, the coplanar waveguide including a center conductor and at least one side ground plane, where the at least one side ground plane is arranged to form a gap between the at least one side ground plane and the microstrip line where an end section of the at least one side ground plane opposite the process line has a radially shaped profile configure such that the gap between the at least one side ground plane and the microstrip line increases as a function of distance away from the process line.