Tunable High-Frequency Transmission Line

• US 20130249653A1
• Filed: 09/08/2011
• Published: 09/26/2013
• Est. Priority Date: 09/08/2010
• Status: Active Grant

• Current Assignee: Universite Joseph Fourier
• Original Assignee: Universite Joseph Fourier
• Inventors: Ferrari, Philippe, Rehder, Gustavo Pamplona
• Granted Patent: US 9,136,573 B2
• Time in Patent Office: Days
• US Class Current: 333/238
• CPC Class Codes: H01P 1/184 Strip line phase-shifters H01P1/181, H01P1/185, H01P1/19 take precedence
• CPC Class Codes: H01P 3/003 Coplanar lines
• CPC Class Codes: H01P 3/006 Conductor backed coplanar waveguides

Abstract

The invention relates to a high-frequency transmission line including a central conductive strip (6) associated with at least one conductive shielding plane (4), wherein at least a portion of the space between the conductive plane and the conductive strip comprises a ferroelectric material (10).

Claims

1. A high-frequency transmission line comprising a central conductive strip associated with at least one conductive shielding plane, wherein at least a portion of the space between the conductive shielding plane and the conductive strip comprises a ferroelectric material.

2. The transmission line of claim 1, wherein the transmission line is of the slow wave coplanar waveguide type, comprising two lateral strips extending on either side of the central strip.

3. The transmission line of claim 1, wherein the ferroelectric material is BST.

4. The transmission line of claim 3, wherein the ferroelectric material has a thickness in the range from 0.4 to 1 μ

m.

5. The transmission line of claim 2, wherein the ferroelectric material extends under all or part of the central strip and of the lateral strips.

6. The transmission line of claim 2, associated with means for selectively biasing the central strip and/or the lateral strips.

7. The transmission line of claim 2, wherein the lateral strips have their central portions formed above recesses and are associated with lateral electrostatic displacement means.