Patent ID: 6683517
Filing Date: 2004-01-27
Classification: H01P,H01Q,H05K

Abstract:
A coaxial cable comprising:a first substantially cylindrical layer of dielectric material; a second substantially cylindrical layer of dielectric material positioned concentric to said first layer of dielectric material, said second layer of dielectric material having a dielectric constant that is less than the dielectric constant of said first layer of dielectric material; first and second electrodes for applying a controllable voltage across said first dielectric material, thereby controlling a dielectric constant of said first dielectric material, wherein said first electrode is positioned between said first and second layers of dielectric material and said second electrode is positioned on the side of said first dielectric layer non-adjacent to said second dielectric layer; a first conductor positioned along an axis associated with said first and second electrodes; and a second conductor concentrically surrounding said first and second substantially cylindrical layers.