Patent ID: 7642883

Claim:
A tunable electromagnetic delay line, comprising: a first conductor with a first main direction of extension, said first conductor being arranged on top of a non-conducting substrate, a layer of a ferroelectric material with first and second main surfaces, said layer separates the first conductor and the substrate, and a second conductor with a second main direction of extension, with the first and second main directions of extensions essentially coinciding with each other, and with the first and second conductors being mirror images with respect to an imaginary line in the center of the delay line along said first and second main directions of extension, said tuning being accomplished by applying a voltage between said first and second conductors, wherein the first conductor alternatingly comprises sections with a second direction of extension and sections with a third direction of extension, and with the second conductor alternatingly comprising sections with a fourth direction of extension and sections with a fifth direction of extension, where said second and fourth directions of extensions essentially coincide with each other, and said third and fifth directions of extensions essentially coincide with each other.