Artificial dielectric antenna elements

• US 7,379,030 B1
• Filed: 11/10/2005
• Issued: 05/27/2008
• Est. Priority Date: 11/12/2004
• Status: Expired due to Fees

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Lier, Erik
• Primary Examiner(s): DINH, TRINH VO
• Application Number:
  US11/270,520
• Time in Patent Office: 929 Days
• Field of Search: 343/786, 343/772, 343/822
• US Class Current: 343/786
• CPC Class Codes: H01Q 13/00 Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
• CPC Class Codes: H01Q 19/08 for modifying the radiation pattern of a radiating horn in which it is located corrugated horns H01Q13/0208; producing a circular polarisation H01Q13/0241

Abstract

An artificial dielectric antenna structure for reducing the mass and insertion loss of an antenna is provided. The artificial dielectric antenna structure includes a plurality of layers of dielectric material. Each layer of dielectric material has a dielectric constant. The artificial dielectric antenna structure further includes a plurality of spacing layers interposed between the plurality of layers of dielectric material. Each of the plurality of spacing layers has a dielectric constant lower than the dielectric constant of any of the plurality of layers of dielectric material. The artificial dielectric antenna structure may be disposed within a horn antenna. The artificial dielectric antenna structure may alternately be disposed upon a transmission medium to form a dielectric resonator antenna.

Claims

1. An artificial dielectric antenna structure for reducing a mass and an insertion loss of an antenna, the artificial dielectric antenna structure comprising:

a plurality of layers of dielectric material, each of the plurality of layers of dielectric material having a dielectric constant;

a plurality of spacing layers interposed between the plurality of layers of dielectric material, each of the plurality of spacing layers having a dielectric constant lower than the dielectric constant of any of the plurality of layers of dielectric material; and

first and second impedance-matching layers of dielectric material surrounding the plurality of layers of dielectric material, each of the first and second impedance-matching layers of dielectric material having an axial width of about ¼

of an operating wavelength of the antenna in the dielectric material of the impedance matching layer.

2. The artificial dielectric antenna structure of claim 1, wherein each of the plurality of layers of dielectric material has the same dielectric.

3. The artificial dielectric antenna structure of claim 1, wherein the dielectric constant of a first one of the plurality of layers of dielectric material is different from the dielectric constant of a second one of the plurality of layers of dielectric material.

4. The artificial dielectric antenna structure of claim 1, wherein the plurality of layers of dielectric material are substantially parallel.

5. The artificial dielectric antenna structure of claim 1, wherein at least one of the plurality of layers of dielectric material comprises a material chosen from the group of materials including TEFLON®

, polystyrene and polyethylene; and

wherein an overall dielectric constant of the artificial dielectric antenna structure is below about 2.

6. The artificial dielectric antenna structure of claim 1, wherein at least one of the plurality of layers of dielectric material comprises a material chosen from the group of materials including TEFLON®

, polystyrene and polyethylene; and

wherein an overall dielectric constant of the artificial dielectric antenna structure is above about 2.

7. The artificial dielectric antenna structure of claim 1, wherein at least one of the plurality of layers of dielectric material includes one or more support structures and one or more alignment structures for coupling the at least one of the plurality of layers of dielectric material to an adjacent one of the plurality of layers of dielectric material.