Analog surface wave multipoint repeater and methods for use therewith

• US 10,536,212 B2
• Filed: 01/03/2019
• Issued: 01/14/2020
• Est. Priority Date: 03/26/2018
• 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: Barzegar, Farhad, Gerszberg, Irwin, Willis, III, Thomas M., Henry, Paul Shala, Bennett, Robert, Barnickel, Donald J., Vannucci, Giovanni
• Primary Examiner(s): Ha, Dac V
• Application Number:
  US16/238,888
• Publication Number:
  US 20190296823A1
• Time in Patent Office: 376 Days
• CPC Class Codes: H04B 1/005 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04B 2203/5491 using filtering and bypassing
• 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
• CPC Class Codes: H04B 3/56 Circuits for coupling, blocking, or by-passing of signals
• CPC Class Codes: H04B 3/58 Repeater circuits
• CPC Class Codes: H04B 7/15 Active relay systems

Abstract

In accordance with one or more embodiments, an analog surface wave multi-point repeater includes a first launcher configured to transmit and receive first guided electromagnetic waves that propagate on an outer surface of a first segment of a transmission medium without requiring an electrical return path. A transceiver includes a splitter coupled to a second launcher and the third launcher and a low noise amplifier configured to receive a second microwave signal from the second launcher and the third launcher via the splitter. A directional coupler is configured to couple the second microwave signal from the second launcher and the first microwave signal to the splitter to facilitate transmission of the second guided electromagnetic waves by the second launcher on the second segment of the transmission medium and to further facilitate transmission of the third guided electromagnetic waves by the third launcher on the third segment of the transmission medium.

Claims

1. An analog surface wave multi-point repeater comprising:

a first launcher configured to transmit and receive first guided electromagnetic waves that propagate on an outer surface of a first transmission medium segment without requiring an electrical return path;

a second launcher configured to transmit and receive second guided electromagnetic waves that propagate on an outer surface of a second transmission medium segment without requiring an electrical return path;

a third launcher configured to transmit and receive third guided electromagnetic waves that propagate on an outer surface of a third transmission medium segment without requiring an electrical return path;

a first transceiver including;

a first low noise amplifier configured to receive a first microwave signal from the first launcher, wherein the first microwave signal is generated by the first launcher in response to receiving the first guided electromagnetic waves from the first transmission medium segment;

a first notch filter configured to attenuate signals in a wireless frequency band from the first microwave signal;

a first amplifier configured to amplify a second microwave signal; and

a first directional coupler configured to couple the first microwave signal from the first launcher and the second microwave signal to the first launcher to facilitate transmission of the first guided electromagnetic waves on the first transmission medium segment; and

a second transceiver including;

a splitter coupled to the second launcher and the third launcher;

a second low noise amplifier configured to receive the second microwave signal from the second launcher and the third launcher via a splitter, wherein the second microwave signal is generated by the splitter in response to the second launcher receiving the second guided electromagnetic waves from the second transmission medium segment and further in response to response to the third launcher receiving the third guided electromagnetic waves from the third transmission medium segment;

a second notch filter configured to attenuate signals in the wireless frequency band from the second microwave signal;

a second amplifier configured to amplify the first microwave signal; and

a second directional coupler configured to couple the second microwave signal from the second launcher and the first microwave signal to the splitter to facilitate transmission of the second guided electromagnetic waves by the second launcher on the second transmission medium segment and to further facilitate transmission of the third guided electromagnetic waves by the third launcher on the third transmission medium segment.

2. The analog surface wave multi-point repeater of claim 1, wherein the transmission medium is a medium voltage cable network supported by a utility pole via an insulator and wherein the first transmission medium segment extends in a first direction from the insulator, the second transmission medium segment extends in a second direction from the insulator and the third segment of the transmission medium extends in a third direction from the insulator.

3. The analog surface wave multi-point repeater of claim 2, further comprising:

a first housing, supported by the first transmission medium segment, configured to support the first launcher, the first transceiver and the second transceiver;

a second housing, coupled to the second transmission medium segment, configured to support the second launcher;

a third housing, coupled to the second transmission medium segment, configured to support the third launcher;

a first cable that couples the second transceiver to the second launcher to bypass the insulator; and

a second cable that couples the second transceiver to third second launcher to bypass the insulator.

4. The analog surface wave multi-point repeater of claim 3, further comprising:

an inductive power supply, supported by the first housing, configured to inductively generate power from the medium voltage cable network to power the first transceiver and the second transceiver.

5. The analog surface wave multi-point repeater of claim 1, wherein the transmission medium is a coaxial cable supported by a utility pole via a pole attachment assembly and wherein the first transmission medium segment extends in a first direction from the pole attachment assembly and the second transmission medium segment extends in a second direction from the pole attachment assembly.

6. The analog surface wave multi-point repeater of claim 5, further comprising:

a first housing, supported by the first transmission medium segment, configured to support the first launcher, the first transceiver and the second transceiver;

a second housing, coupled to the second transmission medium segment, configured to support the second launcher; and

a third housing, coupled to the second transmission medium segment, configured to support the third launcher;

a first cable that couples the second transceiver to the second launcher to bypass the pole attachment assembly; and

a second cable that couples the second transceiver to third second launcher to bypass the pole attachment assembly.

7. The analog surface wave multi-point repeater of claim 5, further comprising:

a power supply, supported by the first housing, configured to generate power from the coaxial cable to power the first transceiver and the second transceiver.

8. The analog surface wave multi-point repeater of claim 1, wherein the first microwave signal and the second microwave signal are formatted in accordance with a multimedia over cable alliance protocol.

9. The analog surface wave multi-point repeater of claim 1, wherein the first microwave signal has a first frequency spectrum and the second microwave signal has a second frequency spectrum and wherein the first frequency spectrum and the second frequency spectrum each are within a range of 500 MHz and 10 GHz and do not overlap.

10. The analog surface wave multi-point repeater of claim 9, wherein the first transceiver further includes:

a first bandpass filter that attenuates the first microwave signal outside the first frequency spectrum; and

a second bandpass filter that attenuates the second microwave signal outside the second frequency spectrum.

11. The analog surface wave multi-point repeater of claim 10, wherein the second transceiver further includes:

a third bandpass filter that attenuates the first microwave signal outside the first frequency spectrum; and

a fourth bandpass filter that attenuates the second microwave signal outside the second frequency spectrum.

12. The analog surface wave multi-point repeater of claim 1, wherein the first transceiver further includes:

a first power detector, coupled to the first directional coupler, configured to detect a power level of the second microwave signal; and

a first processor configured to adjust a gain of the first amplifier based on the power level of the second microwave signal.

13. The analog surface wave multi-point repeater of claim 12, wherein the second transceiver further includes:

a second power detector, coupled to the second directional coupler, configured to detect a power level of the first microwave signal; and

a first processor configured to adjust a gain of the second amplifier based on the power level of the first microwave signal.

14. The analog surface wave multi-point repeater of claim 1, wherein the first directional coupler attenuates the first microwave signal by a first attenuation factor and the second microwave signal by a second attenuation factor and wherein the first attenuation factor is less than the second attenuation factor.

15. The analog surface wave multi-point repeater of claim 14, wherein the second directional coupler attenuates the first microwave signal by a third attenuation factor and the second microwave signal by a fourth attenuation factor and wherein the third attenuation factor is greater than the fourth attenuation factor.

16. A method comprising:

transmitting and receiving, via a first launcher, first guided electromagnetic waves that propagate on an outer surface of a first transmission medium segment without requiring an electrical return path;

transmitting and receiving, via a second launcher, second guided electromagnetic waves that propagate on an outer surface of a second segment of transmission medium without requiring an electrical return path;

transmitting and receiving, via a third launcher, third guided electromagnetic waves that propagate on an outer surface of a third segment of a transmission medium without requiring an electrical return path;

receiving, via a first low noise amplifier, a first microwave signal from the first launcher, wherein the first microwave signal is generated by the first launcher in response to receiving the first guided electromagnetic waves from the first transmission medium segment;

attenuating from the first microwave signal, via a first notch filter, signals in a cellular frequency band;

amplifying, via a first amplifier, a second microwave signal;

coupling, via a first directional coupler, the first microwave signal from the first launcher and the second microwave signal to the first launcher to facilitate transmission of the first guided electromagnetic waves on the first transmission medium segment;

receiving, via a second low noise amplifier, the second microwave signal from the second launcher and the third launcher via a splitter, wherein the second microwave signal is generated by the splitter in response to the second launcher receiving the second guided electromagnetic waves from the second transmission medium segment and further in response to response to the third launcher receiving the third guided electromagnetic waves from the third segment of the transmission medium;

attenuating from the second microwave signal, via a second notch filter, signals in the cellular frequency band;

amplifying, via a second amplifier, the first microwave signal; and

coupling, via a second directional coupler, the second microwave signal from the second launcher and the first microwave signal to the splitter to facilitate transmission of the second guided electromagnetic waves by the second launcher on the second transmission medium segment and to further facilitate transmission of the third guided electromagnetic waves by the third launcher on the third segment of the transmission medium.

17. An analog surface wave multi-point repeater comprising:

a first launching means for transmitting and receiving first guided electromagnetic waves that propagate on an outer surface of a first transmission medium segment without requiring an electrical return path;

a second launching means for transmitting and receiving second guided electromagnetic waves that propagate on an outer surface of a second segment of transmission medium without requiring an electrical return path;

a third launching means for transmitting and receiving third guided electromagnetic waves that propagate on an outer surface of a third segment of transmission medium without requiring an electrical return path;

a first transceiver including;

a first low noise amplifier configured to receive a first microwave signal from the first launching means, wherein the first microwave signal is generated by the first launching means in response to receiving the first guided electromagnetic waves from the first transmission medium segment;

a first notch filter configured to attenuate signals in a wireless frequency band from the first microwave signal;

a first amplifier configured to amplify a second microwave signal; and

a first directional coupler configured to couple the first microwave signal from the first launching means and the second microwave signal to the first launching means to facilitate transmission of the first guided electromagnetic waves on the first transmission medium segment; and

a second transceiver including;

a splitter coupled to the second launching means and the third launching means;

a second low noise amplifier configured to receive the second microwave signal from the second launching means and the third launching means via a splitter, wherein the second microwave signal is generated by the splitter in response to the second launching means receiving the second guided electromagnetic waves from the second transmission medium segment and further in response to response to the third launching means receiving the third guided electromagnetic waves from the third segment of the transmission medium;

a second notch filter configured to attenuate signals in the wireless frequency band from the second microwave signal;

a second amplifier configured to amplify the first microwave signal; and

a second directional coupler configured to couple the second microwave signal from the second launching means and the first microwave signal to the splitter to facilitate transmission of the second guided electromagnetic waves by the second launching means on the second transmission medium segment and to further facilitate transmission of the third guided electromagnetic waves by the third launching means on the third segment of the transmission medium.

18. The analog surface wave multi-point repeater of claim 17, wherein the first microwave signal and the second microwave signal are formatted in accordance with a point-to-multipoint communication protocol.

19. The analog surface wave multi-point repeater of claim 17, wherein the first microwave signal and the second microwave signal are formatted in accordance with a multimedia over cable alliance protocol.

20. The analog surface wave multi-point repeater of claim 17, wherein the first microwave signal has a first frequency spectrum and the second microwave signal has a second frequency spectrum and wherein the first frequency spectrum and the second frequency spectrum do not overlap.