FREQUENCY SELECTIVE MULTI-FEED DIELECTRIC ANTENNA SYSTEMAND METHODS FOR USE THEREWITH

• US 20180166785A1
• Filed: 12/08/2016
• Published: 06/14/2018
• Est. Priority Date: 12/08/2016
• 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: Henry, Paul Shala, BARNICKEL, DONALD J., BARZEGAR, FARHAD, BENNETT, ROBERT, GERSZBERG, IRWIN, WILLIS, III, THOMAS M.
• Granted Patent: US 10,938,108 B2
• Time in Patent Office: Days
• CPC Class Codes: H01Q 1/2291 used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN] H01Q1/241 takes precedence; WLAN in general H04W
• CPC Class Codes: H01Q 13/02 Waveguide horns
• CPC Class Codes: H01Q 13/24 constituted by a dielectric or ferromagnetic rod or pipe H01Q13/28 takes precedence
• CPC Class Codes: H01Q 15/24 Polarising devices; Polarisation filters H01Q15/12, H01Q15/22 take precedence
• 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 25/007 using two or more primary active elements in the focal region of a focusing device for operation on different wavebands H01Q5/22
• CPC Class Codes: H01Q 3/22 varying the orientation in accordance with variation of frequency of radiated wave
• CPC Class Codes: H01Q 3/245 in the focal plane of a focussing device
• CPC Class Codes: H01Q 9/0485 Dielectric resonator antennas

Abstract

In accordance with one or more embodiments, an antenna system includes a dielectric antenna having a feed-point, wherein the dielectric antenna is a single antenna having a plurality of antenna beam patterns. At least one cable having a plurality of conductorless dielectric cores is coupled to the feed-point of the dielectric antenna, each of the plurality of conductorless dielectric cores corresponding to one of the plurality of antenna beam patterns. A frequency selective launcher generates electromagnetic waves and couples the electromagnetic waves to a selected one of the plurality of conductorless dielectric cores, the selected one of the plurality of conductorless dielectric cores corresponding to a selected one of the plurality of antenna beam patterns.

Claims

1. An antenna system, comprising:

a dielectric antenna including a feed-point, wherein the dielectric antenna is a single antenna configured to selectively generate a plurality of antenna beam patterns;

at least one cable comprising a plurality of conductorless dielectric cores coupled to the feed-point of the dielectric antenna, each of the plurality of conductorless dielectric cores, when selected, configured to supply a select one of electromagnetic waves to the feed-point of the dielectric antenna, and the select one of the electromagnetic waves transforming at the dielectric antenna to be emitted as a selected one of the plurality of antenna beam patterns; and

a frequency selective launcher configured to generate the select one of the electromagnetic waves that couples to a selected one of the plurality of conductorless dielectric cores to generate the selected one of the plurality of antenna beam patterns.

2. The antenna system of claim 1, wherein the dielectric antenna operates to generate a wireless signal, having the selected one of the plurality of antenna beam patterns, resulting from propagation of the electromagnetic waves through the dielectric antenna.

3. The antenna system of claim 1, wherein the at least one cable includes a dielectric cladding that supports the plurality of conductorless dielectric cores and an outer jacket.

4. The antenna system of claim 1, wherein the plurality of conductorless dielectric cores are coupled to differing spatial locations at the feed-point of the dielectric antenna.

5. The antenna system of claim 3, wherein the at least one cable lacks a conductive shield layer.

6. The antenna system of claim 3, wherein the plurality of conductorless dielectric cores has a first dielectric constant, wherein the dielectric cladding has a second dielectric constant, and wherein the first dielectric constant exceeds the second dielectric constant.

7. The antenna system of claim 3, wherein the dielectric cladding comprises a low density dielectric material.

8. The antenna system of claim 1, wherein the plurality of conductorless dielectric cores is resistant to propagation of electromagnetic waves having an optical operating frequency.

9. The antenna system of claim 1, wherein the select one of the electromagnetic waves propagates at least in part on an outer surface of the plurality of conductorless dielectric cores without utilizing an electrical return path.

10. The antenna system of claim 1, wherein the frequency selective launcher couples the select one of the electromagnetic waves to the selected one of the plurality of conductorless dielectric cores based on a frequency of the electromagnetic waves.

11. The antenna system of claim 10, wherein the frequency selective launcher includes a plurality of filters and a plurality of launchers and wherein the frequency selective launcher couples the select one of the electromagnetic waves to the selected one of the plurality of conductorless dielectric cores via one of the plurality of filters corresponding to the frequency of the select one of the electromagnetic waves.

12. The antenna system of claim 1, wherein the dielectric antenna has a flared structure.

13. The antenna system of claim 1, wherein the dielectric antenna has a pyramidal structure.

14. The antenna system of claim 1, wherein the dielectric antenna is conductorless.

15. A method, comprising:

coupling first electromagnetic waves having a first frequency from a frequency selective launcher to a first selected one of a plurality of conductorless dielectric cores of a single dielectric antenna, wherein the first selected one of the plurality of conductorless dielectric cores is determined based on the first frequency; and

radiating, via an aperture of the single dielectric antenna, a first wireless signal responsive the first electromagnetic waves at the aperture, the first wireless signal having a selected one of a plurality of antenna beam patterns corresponding to the first selected one of the plurality of conductorless dielectric cores.

16. The method of claim 15, wherein each of the plurality of conductorless dielectric cores is surrounded, at least in part, by a dielectric cladding.

17. The method of claim 15, wherein electromagnetic waves that are guided by differing ones of the plurality of conductorless dielectric cores to the single dielectric antenna result in differing ones of the plurality of antenna beam patterns.

18. The method of claim 15, further comprising:

receiving, by the single dielectric antenna, a second wireless signal having a second frequency; and

coupling second electromagnetic waves, generated by the single dielectric antenna in response to the second wireless signal, to the frequency selective launcher via a second selected one of the plurality of conductorless dielectric cores.

19. An antenna structure, comprising:

a dielectric horn antenna comprising a dielectric material; and

filter means for coupling electromagnetic waves to the dielectric horn antenna via a selected one of a plurality of dielectric cores, wherein the electromagnetic waves guided by the selected one of the plurality of dielectric cores result in a selected one of a plurality of antenna beam patterns and wherein the filter means couples the electromagnetic waves to the selected one of the plurality of dielectric cores based on a frequency of the electromagnetic waves.

20. The antenna structure of claim 19, wherein the dielectric horn antenna operates to generate a wireless signal, the wireless signal having the selected one of the plurality of antenna beam patterns.