System and dielectric antenna with non-uniform dielectric

• US 10,374,316 B2
• Filed: 10/21/2016
• Issued: 08/06/2019
• Est. Priority Date: 10/21/2016
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Bennett, Robert, Gerszberg, Irwin, Barzegar, Farhad, Willis, III, Thomas M., Barnickel, Donald J., Henry, Paul Shala
• Primary Examiner(s): Han, Jessica
• Assistant Examiner(s): Patel, Amal
• Application Number:
  US15/299,576
• Publication Number:
  US 20180115075A1
• Time in Patent Office: 1,019 Days
• CPC Class Codes: H01Q 1/50 Structural association of antennas with earthing switches, lead-in devices or lightning protectors
• CPC Class Codes: H01Q 13/06 Waveguide mouths horns H01Q13/02
• CPC Class Codes: H01Q 13/24 constituted by a dielectric or ferromagnetic rod or pipe H01Q13/28 takes precedence
• CPC Class Codes: H01Q 15/08 formed of solid dielectric material
• 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
• CPC Class Codes: H01Q 5/55 for horn or waveguide antennas
• CPC Class Codes: H04B 1/00 Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission

Abstract

Aspects of the subject disclosure may include, for example, a solid dielectric antenna having a non-uniform spatial distribution of relative permittivity.

Claims

1. A communication device, comprising:

a dielectric antenna having a non-uniform spatial distribution of relative permittivity, wherein, when a longitudinal axis of the dielectric antenna is oriented in a horizontal orientation, the relative permittivity peaks at a largest negative vertical deviation from the longitudinal axis and varies along a vertical axis of the dielectric antenna as a monotonically decreasing function from the largest negative vertical deviation from the longitudinal axis to a largest positive vertical deviation from the longitudinal axis;

a cable comprising a dielectric core coupled to a feed point of the dielectric antenna; and

a transmitter, coupled to the cable, the transmitter facilitating a transmission of electromagnetic waves, the electromagnetic waves guided by the dielectric core, without an electrical return path, to the feed point of the dielectric antenna.

2. The communication device of claim 1, wherein the dielectric antenna is symmetrical about the longitudinal axis of the dielectric antenna and generates a far-field beam pattern that is asymmetrical about the longitudinal axis.

3. The communication device of claim 2, wherein the far-field beam pattern has a major lobe angularly displaced from the longitudinal axis.

4. The communication device of claim 3, wherein the major lobe has a first gain at a first angular displacement from a maximal direction of the major lobe and a second gain at a second angular displacement from the maximal direction of the major lobe and wherein the second angular displacement is opposite the first angular displacement along a vertical plane of the dielectric antenna, the first gain is different from the second gain.

5. The communication device of claim 1, wherein the non-uniform spatial distribution of relative permittivity includes at least one region of the dielectric antenna having a higher relative permittivity than at least one other region of the dielectric antenna.

6. The communication device of claim 5, wherein the dielectric antenna is non-uniformly doped and wherein the at least one region of the dielectric antenna has a higher relative dopant density than the at least one other region of the dielectric antenna.

7. The communication device of claim 1, wherein the dielectric antenna comprises a plurality of dielectric sections each composed of one of a plurality of dielectric materials.

8. The communication device of claim 1, wherein the relative permittivity varies along the vertical axis of the dielectric antenna as a continuous function.

9. The communication device of claim 1, wherein the relative permittivity varies along the vertical axis of the dielectric antenna as a discrete function.

10. An antenna structure, comprising:

a feed point that facilitates coupling to a dielectric core that supplies electromagnetic waves to the feed point; and

a solid dielectric antenna coupled to the feed point for receiving the electromagnetic waves, the solid dielectric antenna having a non-uniform spatial distribution of relative permittivity, wherein, when a longitudinal axis of the dielectric antenna is oriented in a horizontal orientation, the relative permittivity peaks at a largest negative vertical deviation from the longitudinal axis and varies along a vertical axis of the solid dielectric antenna as a monotonically decreasing function from the largest negative vertical deviation from the longitudinal axis to a largest positive vertical deviation from the longitudinal axis.

11. The antenna structure of claim 10, wherein the solid dielectric antenna is symmetrical about the longitudinal axis of the solid dielectric antenna and generates a far-field beam pattern that is asymmetrical about the longitudinal axis.

12. The antenna structure of claim 11, wherein the far-field beam pattern has a major lobe angularly displaced from the longitudinal axis.

13. The antenna structure of claim 12, wherein the major lobe has a first gain at a first angular displacement from a maximal direction of the major lobe and a second gain at a second angular displacement from the maximal direction of the major lobe and wherein the second angular displacement is opposite the first angular displacement along a vertical plane of the solid dielectric antenna, the first gain is different from the second gain.

14. The antenna structure of claim 10, wherein the non-uniform spatial distribution of relative permittivity includes at least one region of the solid dielectric antenna having a higher relative permittivity than at least one other region of the solid dielectric antenna.

15. The antenna structure of claim 14, wherein the solid dielectric antenna is non-uniformly doped and wherein the at least one region of the solid dielectric antenna has a higher relative dopant density than the at least one other region of the solid dielectric antenna.

16. The antenna structure of claim 10, wherein the solid dielectric antenna comprises a plurality of dielectric sections each composed of one of a plurality of dielectric materials.

17. The antenna structure of claim 10, wherein the solid dielectric antenna has an operating face that radiates or receives microwave signals.

18. An antenna, comprising:

three or more dielectric sections each composed of a different dielectric material, the three of more dielectric sections each comprising a corresponding lateral slice of a solid horn, wherein, when a longitudinal axis of the dielectric antenna is oriented in a horizontal orientation, the relative permittivity peaks at a largest negative vertical deviation from the longitudinal axis and varies along a vertical axis of the dielectric antenna as a monotonically decreasing function from the largest negative vertical deviation from the longitudinal axis to a largest positive vertical deviation from the longitudinal axis.

19. The antenna of claim 18, wherein the solid horn is symmetrical about the longitudinal axis of the antenna and wherein the antenna generates a far-field beam pattern that is asymmetrical about the longitudinal axis.

20. The antenna of claim 19, wherein the far-field beam pattern has a major lobe angularly displaced from the longitudinal axis.