Apparatus and method for guided wave communications using an absorber

• US 10,541,460 B2
• Filed: 06/18/2019
• Issued: 01/21/2020
• Est. Priority Date: 12/01/2017
• 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, Vannucci, Giovanni, Willis, III, Thomas M.
• Primary Examiner(s): Jones, Stephen E.
• Application Number:
  US16/443,909
• Publication Number:
  US 20190305399A1
• Time in Patent Office: 217 Days
• Field of Search: 333240, 333 24 R, 333 21 R
• CPC Class Codes: G01R 1/24 Transmission-line, e.g. waveguide, measuring sections, e.g. slotted section
• CPC Class Codes: H01P 1/225 Coaxial attenuators H01P1/23 takes precedence
• CPC Class Codes: H01P 3/10 Wire waveguides, i.e. with a single solid longitudinal conductor
• CPC Class Codes: H01P 3/12 Hollow waveguides H01P3/20 takes precedence
• CPC Class Codes: H01P 5/188 the guides being dielectric waveguides
• CPC Class Codes: H04B 10/25752 Optical arrangements for wireless networks
• CPC Class Codes: H04B 3/52 Systems for transmission between fixed stations via waveguides
• CPC Class Codes: H04B 3/54 Systems for transmission via power distribution lines

Abstract

Aspects of the subject disclosure may include, a system having an absorber and a coupling device. The absorber includes absorbent material that absorbs radiation. The coupling device is positioned in and surrounded by the absorber. The coupling device facilitates transmitting or receiving of an electromagnetic wave along a transmission medium, where the electromagnetic wave propagates along the transmission medium without requiring an electrical return path. Other embodiments are disclosed.

Claims

1. A communication device, comprising:

an absorber comprising radiation absorbent material;

a receiver having an aperture and surrounded by the radiation absorbent material, wherein the receiver receives at the aperture a first electromagnetic wave that propagates along a transmission medium without requiring an electrical return path, and wherein the receiver obtains a first communication signal from the first electromagnetic wave; and

a launcher collocated with the receiver and surrounded by the radiation absorbent material, wherein the launcher induces a second electromagnetic wave that conveys a second communication signal, and wherein the radiation absorbent material absorbs radiation associated with the second electromagnetic wave in proximity to the launcher.

2. The communication device of claim 1, wherein the absorber has a cylindrical shape defining a cavity therethrough, and wherein the launcher is positioned in the cavity.

3. The communication device of claim 2, wherein the transmission medium passes through the cavity.

4. The communication device of claim 2, wherein the receiver is positioned in the cavity.

5. The communication device of claim 2, wherein the cavity has an inner radius, and wherein the launcher induces the second electromagnetic wave such that a distance from the transmission medium to an outer extent of the second electromagnetic wave is less than the inner radius of the cavity.

6. The communication device of claim 1, wherein a portion of the launcher is positioned outside of the absorber.

7. The communication device of claim 1, wherein the launcher, the absorber and the transmission medium are concentrically aligned.

8. The communication device of claim 1, wherein the radiation absorbent material of the absorber circumscribes second material that is not radiation absorbent.

9. The communication device of claim 8, wherein the second material has a cylindrical shape.

10. The communication device of claim 1, wherein the launcher is configured as a hollow horn, and wherein the transmission medium passes through the hollow horn.

11. The communication device of claim 1, wherein the absorber circumscribes the launcher.

12. The communication device of claim 1, wherein the absorber comprises a rigid body, and wherein the radiation absorbent material is connected to and surrounded by the rigid body.

13. The communication device of claim 1, comprising transceiver circuitry and a cable, wherein the cable has a dielectric core coupled to the launcher, and wherein the transceiver circuitry and the launcher are coupled via the cable.

14. A communication device, comprising:

an absorber comprising radiation absorbent material;

a receiver having an aperture and surrounded by the radiation absorbent material, wherein the receiver receives at the aperture a first electromagnetic wave that propagates along a transmission medium without requiring an electrical return path; and

a launcher collocated with the receiver and surrounded by the radiation absorbent material, wherein the launcher induces a second electromagnetic wave, and wherein the radiation absorbent material absorbs radiation associated with the second electromagnetic wave in proximity to the launcher.

15. The communication device of claim 14, further comprising:

a coupling device positioned in and surrounded by the absorber.

16. The communication device of claim 15, wherein the coupling device has a distal end, and wherein the radiation absorbent material absorbs radiation in proximity to the distal end of the coupling device.

17. The communication device of claim 15, wherein the absorber has a cylindrical shape defining a cavity therethrough, wherein the coupling device has a hollow horn shape and is positioned in the cavity, and wherein the transmission medium passes through the cavity.

18. The communication device of claim 14, wherein the absorber comprises a rigid body having a cylindrical shape, and wherein the radiation absorbent material is connected to and surrounded by the rigid body.

19. A method comprising:

generating, by a launcher of a communication device, a first electromagnetic wave that propagates along a transmission medium without requiring an electrical return path;

absorbing, by an absorber of the communication device, radiation associated with the first electromagnetic wave in proximity to the launcher; and

receiving, by a receiver of the communication device, a second electromagnetic wave that propagates along the transmission medium without requiring the electrical return path.

20. The method of claim 19, wherein the first electromagnetic wave conveys a first communication signal, the method further comprising:

obtaining, by the receiver, a second communication signal from the second electromagnetic wave; and

selecting, by the communication device, parameters for the first electromagnetic wave such that a distance from the transmission medium to an outer extent of the first electromagnetic wave is less than an inner radius of a cavity defined by the absorber.