Patents by Inventor Chao Yuan Chen

Chao Yuan Chen 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).

  • Liquid-crystal-absed retardation-free terahertz phase shifter
    Publication number: 20070188668
    Abstract: The present invention enables a means of continuously shifting the phase of electromagnetic waves in the THz (0.1 to 10 THz, 1 THz=10?12 Hz) or sub-millimeter wave range. It is based on magnetically controlled birefringence of liquid crystals. The device consists of an assembly of a liquid crystal cell and rotatable magnets. By varying the angle of the magnet with respect to the incident THz wave, desired phase shift or delay can be achieved. To increase the amount of phase shift, the device employs multiple liquid crystal cells in a compact sandwich structure.
    Type: Application
    Filed: February 5, 2007
    Publication date: August 16, 2007
    Inventors: Ci-Ling Pan, Ru-Pin Chao, Chao-Yuan Chen
  • Terahertz phase shifter or retarder based on magnetically controlled birefringence in liquid crystals
    Publication number: 20050024359
    Abstract: The present invention enables a means of continuously shifting the phase of electromagnetic waves in the THz (0.1 to 10 THz, 1 THz=10?12 Hz) or sub-millimeter wave range. It is based on magnetically controlled birefringence of liquid crystals. The device consists of an assembly of a liquid crystal cell and rotatable magnets. By varying the angle of the magnet with respect to the incident THz wave, desired phase shift or delay can be achieved. To increase the amount of phase shift, the device employs multiple liquid crystal cells in a compact sandwich structure.
    Type: Application
    Filed: November 12, 2003
    Publication date: February 3, 2005
    Inventors: Ci-Ling Pan, Ru-Pin Chao, Chao-Yuan Chen