Analog surface wave repeater pair and methods for use therewith

• US 10,171,158 B1
• Filed: 03/26/2018
• Issued: 01/01/2019
• 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
• Application Number:
  US15/935,509
• Time in Patent Office: 281 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 3/36 Repeater circuits H04B3/58 takes precedence
• CPC Class Codes: H04B 3/52 Systems for transmission between fixed stations via waveguides
• CPC Class Codes: H04B 7/14 Relay systems
• CPC Class Codes: H04B 7/15 Active relay systems

Abstract

In accordance with one or more embodiments, an analog surface wave repeater pair 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. A second launcher is configured to transmit and receive second guided electromagnetic waves that propagate on an outer surface of a second segment of the transmission medium. A first transceiver includes a first notch filter is configured to attenuate signals in a fourth generation (4G) wireless frequency band from the first microwave signal generated by the first launcher in response to receiving the first guided electromagnetic waves. A second transceiver includes a second notch filter configured to attenuate signals in the fourth 4G wireless frequency band from a second microwave signal generated by the second launcher in response to receiving the second guided electromagnetic waves.

Claims

1. An analog surface wave repeater pair comprising:

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 second launcher configured to transmit and receive second guided electromagnetic waves that propagate on an outer surface of a second 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 launcher, wherein the first microwave signal is generated by the first launcher in response to receiving the first guided electromagnetic waves from the first segment of the transmission medium;

a first notch filter configured to attenuate signals in a fourth generation (4G) 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 segment of the transmission medium; and

a second transceiver including;

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

a second notch filter configured to attenuate signals in the 4G 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 second launcher to facilitate transmission of the second guided electromagnetic waves on the second segment of the transmission medium.

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

3. The analog surface wave repeater pair of claim 2, further comprising:

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

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

a cable that couples the first transceiver to the second transceiver to bypass the insulator.

4. The analog surface wave repeater pair of claim 3, further comprising:

a first inductive power supply, supported by the first housing, configured to inductively generate power from the medium voltage cable to power the first transceiver; and

a second inductive power supply, supported by the second housing, configured to inductively generate power from the medium voltage cable to power the second transceiver.

5. The analog surface wave repeater pair of claim 2, further comprising:

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

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

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

6. The analog surface wave repeater pair of claim 5, further comprising:

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

7. The analog surface wave repeater pair 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 segment of the transmission medium extends in a first direction from the pole attachment assembly and the second segment of the transmission medium extends in a second direction from the pole attachment assembly.

8. The analog surface wave repeater pair of claim 7, further comprising:

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

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

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

9. The analog surface wave repeater pair of claim 7, further comprising:

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

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

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

10. The analog surface wave repeater pair of claim 7, 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.

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

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

13. The analog surface wave repeater pair of claim 12, 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.

14. The analog surface wave repeater pair of claim 13, 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.

15. The analog surface wave repeater pair 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.

16. The analog surface wave repeater pair of claim 15, 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.

17. The analog surface wave repeater pair 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.

18. The analog surface wave repeater pair of claim 17, 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.

19. A method comprising:

transmitting and receiving, via a first launcher, first guided electromagnetic waves that propagate on an outer surface of a first segment of a transmission medium 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;

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 segment of the transmission medium;

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 segment of the transmission medium;

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

attenuating from the second microwave signal, via a second notch filter, signals in the 4G wireless 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 second launcher to facilitate transmission of the second guided electromagnetic waves on the second segment of the transmission medium.

20. An analog surface wave repeater pair comprising:

a first launching means for transmitting and receiving 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 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 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 segment of the transmission medium;

a first notch filter configured to attenuate signals in a fourth generation (4G) 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 segment of the transmission medium; and

a second transceiver including;

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

a second notch filter configured to attenuate signals in the 4G 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 second launching means to facilitate transmission of the second guided electromagnetic waves on the second segment of the transmission medium.