Patents by Inventor Aubrey I. Chapman

Aubrey I. Chapman 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: 6169910
    Abstract: A system for establishing and utilizing a wireless communication system using a lens antenna having a dielectric material lens. The lens focuses output radio frequency (rf) signals into narrow beam rf signals which are directed to a specific receiving communication device. The lens focuses input rf signals onto signal processing equipment. A communication system between two or more communication devices which utilizes a dielectric material lens and signal processing equipment can be used for point-to-point or point-to-multipoint communication.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: January 2, 2001
    Assignee: Focused Energy Holding Inc.
    Inventors: Lakshman S. Tamil, Aubrey I. Chapman, Douglas F. Carey
  • Patent number: 5838276
    Abstract: A microwave radio frequency landing system includes an aircraft borne transmitter/receiver (transceiver) and a ground unit. The ground unit comprises a dielectric material lens and a transponder module array. The transceiver transmits pulsed interrogation signals to the ground unit. The dielectric material lens focuses the pulsed signals onto the transponder module array. The transponder modules illuminated by the pulsed signals transmit continuous wave return signals to the aircraft. Each continuous wave return signal comprises four tones, which are used by the aircraft to determine azimuth and glide slope of the aircraft, carried on a microwave carrier. In each transponder module which receives the pulsed signals from the aircraft transceiver, the microwave carrier is phase inverted for the duration of each pulse of the pulsed signals. The phase inversions on the microwave carrier are used by the aircraft to determine the range, velocity and acceleration of the aircraft with respect to the ground unit.
    Type: Grant
    Filed: September 3, 1996
    Date of Patent: November 17, 1998
    Inventors: Aubrey I. Chapman, George F. Ridpath