Patents by Inventor Harold Lee Rappaport

Harold Lee Rappaport has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10446935
    Abstract: In accordance with one or more embodiments, a system includes an impedance matching circuit that includes one or more adjustable circuit elements, wherein the impedance matching circuit receives an input signal and generates an output signal in response to the input signal. A guided wave launcher is configured to generate, in response to the output signal, a first guided electromagnetic wave along a surface of a transmission medium, wherein the first guided electromagnetic wave propagates along the surface of the transmission medium without requiring an electrical return path. A controller is configured to generate one or more control signals in response to a channel quality indicator, wherein the one or more control signals adjust the one or more adjustable circuit elements of the impedance matching circuit, wherein adjustment of the one or more adjustable circuit elements facilitates reducing an impedance mismatch of the guided wave launcher.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: October 15, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Harold Lee Rappaport
  • Publication number: 20190261192
    Abstract: Aspects of the subject disclosure may include, for example, a guided wave launcher generates, in response to an output RF signal, a guided electromagnetic wave along a surface of a transmission medium, wherein the guided electromagnetic wave propagates along the surface of the transmission medium without requiring an electrical return path, and wherein the guided electromagnetic wave has a non-optical carrier frequency. A mismatch probe generates a mismatch signal based on the output RF signal, wherein the mismatch signal indicates an impedance mismatch of the guided wave launcher. A controller generates one or more control signals in response to the mismatch signal, wherein the one or more control signals adjust one or more adjustable circuit elements of an impedance matching circuit, wherein adjustment of the one or more adjustable circuit elements facilitates reducing the impedance mismatch of the guided wave launcher. Other embodiments are disclosed.
    Type: Application
    Filed: May 7, 2019
    Publication date: August 22, 2019
    Applicant: AT&T Intellectual Property I, L.P.
    Inventor: Harold Lee Rappaport
  • Patent number: 10327153
    Abstract: Aspects of the subject disclosure may include, for example, a guided wave launcher generates, in response to an output RF signal, a guided electromagnetic wave along a surface of a transmission medium, wherein the guided electromagnetic wave propagates along the surface of the transmission medium without requiring an electrical return path, and wherein the guided electromagnetic wave has a non-optical carrier frequency. A mismatch probe generates a mismatch signal based on the output RF signal, wherein the mismatch signal indicates an impedance mismatch of the guided wave launcher. A controller generates one or more control signals in response to the mismatch signal, wherein the one or more control signals adjust one or more adjustable circuit elements of an impedance matching circuit, wherein adjustment of the one or more adjustable circuit elements facilitates reducing the impedance mismatch of the guided wave launcher. Other embodiments are disclosed.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: June 18, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Harold Lee Rappaport
  • Patent number: 10305192
    Abstract: In accordance with one or more embodiments, a system includes an impedance matching circuit that includes one or more adjustable circuit elements, wherein the impedance matching circuit receives an input signal and generates an output signal in response to the input signal. A guided wave launcher is configured to generate, in response to the output signal, a first guided electromagnetic wave along a surface of a transmission medium, wherein the first guided electromagnetic wave propagates along the surface of the transmission medium without requiring an electrical return path. A controller is configured to generate one or more control signals in response to a channel quality indicator, wherein the one or more control signals adjust the one or more adjustable circuit elements of the impedance matching circuit, wherein adjustment of the one or more adjustable circuit elements facilitates reducing an impedance mismatch of the guided wave launcher.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: May 28, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Harold Lee Rappaport
  • Publication number: 20190053068
    Abstract: Aspects of the subject disclosure may include, for example, a guided wave launcher generates, in response to an output RF signal, a guided electromagnetic wave along a surface of a transmission medium, wherein the guided electromagnetic wave propagates along the surface of the transmission medium without requiring an electrical return path, and wherein the guided electromagnetic wave has a non-optical carrier frequency. A mismatch probe generates a mismatch signal based on the output RF signal, wherein the mismatch signal indicates an impedance mismatch of the guided wave launcher. A controller generates one or more control signals in response to the mismatch signal, wherein the one or more control signals adjust one or more adjustable circuit elements of an impedance matching circuit, wherein adjustment of the one or more adjustable circuit elements facilitates reducing the impedance mismatch of the guided wave launcher. Other embodiments are disclosed.
    Type: Application
    Filed: October 16, 2018
    Publication date: February 14, 2019
    Applicant: AT&T Intellectual Property I, L.P.
    Inventor: Harold Lee Rappaport
  • Patent number: 10142854
    Abstract: Aspects of the subject disclosure may include, for example, a guided wave launcher generates, in response to an output RF signal, a guided electromagnetic wave along a surface of a transmission medium, wherein the guided electromagnetic wave propagates along the surface of the transmission medium without requiring an electrical return path, and wherein the guided electromagnetic wave has a non-optical carrier frequency. A mismatch probe generates a mismatch signal based on the output RF signal, wherein the mismatch signal indicates an impedance mismatch of the guided wave launcher. A controller generates one or more control signals in response to the mismatch signal, wherein the one or more control signals adjust one or more adjustable circuit elements of an impedance matching circuit, wherein adjustment of the one or more adjustable circuit elements facilitates reducing the impedance mismatch of the guided wave launcher. Other embodiments are disclosed.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: November 27, 2018
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Harold Lee Rappaport
  • Publication number: 20180249342
    Abstract: Aspects of the subject disclosure may include, for example, a guided wave launcher generates, in response to an output RF signal, a guided electromagnetic wave along a surface of a transmission medium, wherein the guided electromagnetic wave propagates along the surface of the transmission medium without requiring an electrical return path, and wherein the guided electromagnetic wave has a non-optical carrier frequency. A mismatch probe generates a mismatch signal based on the output RF signal, wherein the mismatch signal indicates an impedance mismatch of the guided wave launcher. A controller generates one or more control signals in response to the mismatch signal, wherein the one or more control signals adjust one or more adjustable circuit elements of an impedance matching circuit, wherein adjustment of the one or more adjustable circuit elements facilitates reducing the impedance mismatch of the guided wave launcher. Other embodiments are disclosed.
    Type: Application
    Filed: April 6, 2018
    Publication date: August 30, 2018
    Applicant: AT&T Intellectual Property I, L.P.
    Inventor: Harold Lee Rappaport
  • Patent number: 9973940
    Abstract: Aspects of the subject disclosure may include, for example, a guided wave launcher generates, in response to an output RF signal, a guided electromagnetic wave along a surface of a transmission medium, wherein the guided electromagnetic wave propagates along the surface of the transmission medium without requiring an electrical return path, and wherein the guided electromagnetic wave has a non-optical carrier frequency. A mismatch probe generates a mismatch signal based on the output RF signal, wherein the mismatch signal indicates an impedance mismatch of the guided wave launcher. A controller generates one or more control signals in response to the mismatch signal, wherein the one or more control signals adjust one or more adjustable circuit elements of an impedance matching circuit, wherein adjustment of the one or more adjustable circuit elements facilitates reducing the impedance mismatch of the guided wave launcher. Other embodiments are disclosed.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: May 15, 2018
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Harold Lee Rappaport