Patents by Inventor Charles P. Leonard

Charles P. Leonard 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).

  • Anechoic test chamber and method of determining a loss characteristic of a material specimen
    Patent number: 6859047
    Abstract: An anechoic test chamber for testing an electromagnetic loss characteristic of a material specimen has first and second opposed and tapered conical sections. The chamber has an anechoic material covering its inside surface. Feed and receive antennas are disposed on the ends of the conical sections. An aperture plate is disposed between the first and second sections. The aperture plate electromagnetically isolates the first and second conical sections except for the aperture itself. A method of determining an electromagnetic loss characteristic of a material specimen utilizes a dual tapered conical chamber for processing S-parameter measurements to determine impedance, complex permittivity, or complex permeability of the specimen.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: February 22, 2005
    Assignee: The Boeing Company
    Inventors: Leland H. Hemming, Charles P. Leonard
  • Anechoic test chamber and method of determining a loss characteristic of a material specimen
    Publication number: 20040075443
    Abstract: An anechoic test chamber for testing an electromagnetic loss characteristic of a material specimen has first and second opposed and tapered conical sections. The chamber has an anechoic material covering its inside surface. Feed and receive antennas are disposed on the ends of the conical sections. An aperture plate is disposed between the first and second sections. The aperture plate electromagnetically isolates the first and second conical sections except for the aperture itself. A method of determining an electromagnetic loss characteristic of a material specimen utilizes a dual tapered conical chamber for processing S-parameter measurements to determine impedance, complex permittivity, or complex permeability of the specimen.
    Type: Application
    Filed: October 18, 2002
    Publication date: April 22, 2004
    Applicant: The Boeing Company
    Inventors: Leland H. Hemming, Charles P. Leonard