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IP.com Disclosure Number: IPCOM000008347D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2002-Jun-07

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Richard Carlson


A method to tune stripline transmission circuits is proposed. Stripline is a transmission medium composed of two ground planes that sandwich a strip conductor. Traditionally, these ground planes are solid conducting planes and are an integral part of the transmission medium. It is desirable in many circumstances to make the transmission medium electrically "tu,nable" to account for design and process variations. Stripline is difficult to tune with its solid ground planes. It's proposed that stripline could be made tunable through replacing one (or both) of the ground planes with a grid-like ground plane. Changes to the strip electrical characteristics could be made by judiciously cutting (laser or mill) open slots within the grid. Slots effectively would lower the capacitance between the strip and ground;