Patent ID: 7688165

Claim:
A galvanic device for a planar circuit, the planar circuit formed on a two-sided substrate, the galvanic isolation mechanism comprising: a coplanar waveguide formed on a first side of the two-sided substrate and including a center conductor and two side ground planes running parallel and equidistant on each side of the center conductor, the centre conductor ending in a microstrip line; a first ground plane formed on a second side of the two-sided substrate and underlying the microstrip line and an adjacent portion of the coplanar waveguide, thus transforming the coplanar waveguide into a grounded coplanar waveguide; a direct current isolation component formed on the first side of the two-sided substrate; and a coaxial cable connector mounted on the first side of the two-sided substrate and connected to the coplanar wave guide, wherein a first terminal of the coaxial cable connector is connected to the two side ground planes and a second terminal of the coaxial cable connector is connected to the center conductor of the coplanar wave guide, wherein the direct current isolation component is arranged between the microstrip line and a further microstrip line formed on the first side of the two-sided substrate, and comprises a strip extending from an end of the microstrip line, with another strip extending from an adjacent end of the further microstrip line, and a gap separating and galvanically isolating said strips from each other, and wherein the two side ground planes of the coplanar waveguide are galvanically isolated from the first ground plane.