Tunable high-frequency transmission line

• US 9,136,573 B2
• Filed: 09/08/2011
• Issued: 09/15/2015
• Est. Priority Date: 09/08/2010
• Status: Expired due to Fees

• Current Assignee: Universite Joseph Fourier
• Original Assignee: Universite Joseph Fourier
• Inventors: Ferrari, Philippe, Rehder, Gustavo Pamplona
• Primary Examiner(s): Donovan, Lincoln
• Assistant Examiner(s): Almo, Khareem E
• Application Number:
  US13/821,865
• Publication Number:
  US 20130249653A1
• Time in Patent Office: 1,468 Days
• Field of Search: None
• US Class Current: 1/1
• 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, wherein the transmission line is of the slow wave coplanar waveguide type, comprising two lateral strips extending on either side of the central conductive strip and wherein the transmission line is associated with a voltage source for selectively biasing at least one of the central conductive strip and the lateral strips.

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

3. The transmission line of claim 2, wherein the ferroelectric material has a thickness in the range from 0.4 to 1 μ

m.

4. The transmission line of claim 1, wherein the ferroelectric material extends under all or part of the central conductive strip and of the lateral strips.

5. The transmission line of claim 1, wherein the lateral strips have their central portions formed above recesses and are associated with lateral electrostatic displacement means.

6. 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, wherein the transmission line is of the slow wave coplanar waveguide type, comprising two lateral strips extending on either side of the central strip and wherein the lateral strips have their central portions formed above recesses and are associated with lateral electrostatic displacement means.