Galvanic isolation mechanism for a planar circuit

Details Galvanic isolation mechanism for a planar circuit Galvanic isolation mechanism for a planar circuit

2006-09-28

2009-06-09

Jones, Stephen E (Department: 2817)

Wave transmission lines and networks

Long line elements and components

Connectors and interconnections

C333S033000

Reexamination Certificate

active

07545243

ABSTRACT:
A mechanism for coupling a coaxial cable (108) to a planar circuit to provide galvanic isolation between the coaxial cable and the planar circuit while providing low transmission loss and reflections between the coaxial cable (108) and the circuit. The mechanism comprises a co-planar waveguide (211) coupled to the coaxial cable (108), a microstrip line (240) connected to the circuit, a galvanic isolation component (234) and a ground plane (222). The co-planar waveguide (211), the microstrip line (240) and the galvanic isolation component (234) are formed on one side (203) of a two-sided substrate (202). The ground plane (222) is formed on the other side (205) of the substrate (202) and underlies at least a portion of the co-planar waveguide (211) to form a grounded co-planar waveguide (221). The ground plane (222) includes a notch (224) underlying a portion of the co-planar waveguide (211) to provide a transition region (225) from the co-planar waveguide (211) to the grounded co-planar waveguide (221).

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Jean-Pierre Raskin, Gildas Gauthier, Linda P. Katehi and Gabriel M. Rebeiz; “Mode Conversion at GCPW-to-Microstrip-Line Transistions”; IEEE Transactions on Microwave Theory and Techniques, Jan. 2000, vol. 48, No. 1; pp. 158-161.

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