Patents Assigned to Chaparral Communications, Inc.
  • Patent number: 7957692
    Abstract: Embodiments of the present invention recite an improved signal receiver circuit and a method of implementation. In one embodiment, a first signal pathway of a low-noise block feedhorn comprises a ceramic low-pass filter coupled with a first polarity signal input. In accordance with embodiments of the present invention, a second signal pathway of the low-noise block feedhorn comprises ceramic high-pass filter coupled with a second polarity signal input.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: June 7, 2011
    Assignee: Chaparral Communications, Inc.
    Inventor: Yu-Wei Liu
  • Patent number: 5603077
    Abstract: A satellite broadcast system using an airwave message signal to remotely control a signal receiver. The system includes a system manager to issue a message, a message service to broadcast the message in the airwave message signal, and a signal receiver to select a satellite and a channel of a downlink signal from the satellite carrying a desired program. The program may include audio/video, text, pictures, software, or data. In the preferred embodiment, the message service is a pager service.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: February 11, 1997
    Assignee: Chaparral Communications, Inc.
    Inventors: Thomas A. Muckle, Gregory D. Gudorf, John O. Bumgarner
  • Patent number: 5579367
    Abstract: A satellite network receiver connected to receive video and audio programs and commands from orbiting satellites through a steerable dish antenna. Commands are alternatively received by the satellite receiver via pager radio service or phone wire from a network controller that uplinked the satellite programming. All user controls are eliminated from the satellite receiver and the network controller uses its command capability to steer the users antenna and to analyze and initiate diagnostics performed on various parts of the satellite receiver.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: November 26, 1996
    Assignee: Chaparral Communications, Inc.
    Inventors: J. Brian Raymond, Dan E. Bower
  • Patent number: 5461394
    Abstract: A dual band signal receiver is provided with relatively coaxial antenna assemblies electromagnetically coupled to respective upper and lower band rectangular waveguides and ports through suitable polarization switching assemblies. The upper band rotatable antenna assembly consists of a dipole feed having driven dipole elements, parasitic dipole elements and a corner reflector element electromagnetically coupled to the upper band rectangular waveguide by a suitable transmission line extending substantially along the longitudinal axis or centerline of the lower band cylindrical waveguide.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: October 24, 1995
    Assignee: Chaparral Communications Inc.
    Inventor: John Weber
  • Patent number: 5459441
    Abstract: Signal propagation apparatus is formed with a waveguide cavity for propagating first and second electromagnetic signals respectively having first and second electric fields that are distinguished outside the cavity by first and second polarizations, for example orthogonal polarizations, one vertical and one horizontal. Within the cavity, the electric field lines are curved and cross one another at angles that vary as a function of location within the cavity. A pair of probes are mounted within the cavity in spaced-apart relation to each other and have orientations that differ from the orientations of the electric fields outside the cavity. In order to send or transmit signals having electric fields that are respectively vertically and horizontally polarized, for example, thereby forming an angle of 90.degree. with respect to each other, the probes lie in planes forming a dihedral angle of about 80.degree..
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: October 17, 1995
    Assignee: Chaparral Communications Inc.
    Inventors: John G. Weber, Richard C. Yu
  • Patent number: 4578681
    Abstract: An optimized feedhorn comprising a circular waveguide having a corrugated plate disposed around the outside of the aperture of the waveguide wherein the corrugations of the plate are capacitive as to E plane signals. The feedhorn includes a reduced aperture diameter which selectively protrudes beyond the plane of the corrugated plate. The amount of protrusion of the aperture is determined to approximately equalize E and H plane beamwidths and selectively shape the top and skirts of the signal pattern around the center frequency of interest.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: March 25, 1986
    Assignee: Chaparral Communications, Inc.
    Inventor: H. Taylor Howard
  • Patent number: 4544900
    Abstract: A rotatable polarized signal receiver, having a rectangular waveguide orthogonally coupled to a circular waveguide, has a receiver probe portion oriented in the circular waveguide and a signal launch probe portion extending into the rectangular waveguide. A dielectric insert located in the circular waveguide transforms circularly polarized signals to linearly polarized signals. Since the receiver probe portion can be rotated right circular or left circular polarization can be selected and received.
    Type: Grant
    Filed: July 30, 1982
    Date of Patent: October 1, 1985
    Assignee: Chaparral Communications, Inc.
    Inventor: H. Taylor Howard
  • Patent number: 4503379
    Abstract: A continuously-variable septum for rotation of electric field polarization in a circular waveguide comprising a continuous, serpentine-shaped, electrically conductive filament.
    Type: Grant
    Filed: April 12, 1983
    Date of Patent: March 5, 1985
    Assignee: Chaparral Communications, Inc.
    Inventor: Clifford Raiman
  • Patent number: 4414516
    Abstract: A rotatable polarized signal receiver in a system for receiving linearly polarized electromagnetic signals includes a signal conductor having a receiver probe portion, oriented in a circular waveguide parallel to the polarization of the incident signal, and signal launch probe portion extending into the rectangular waveguide orthogonal to the direction of signal transmission therein, mounted concentrically in an insulator rod through perpendicular coupling of the circular and rectangular waveguides.
    Type: Grant
    Filed: November 18, 1981
    Date of Patent: November 8, 1983
    Assignee: Chaparral Communications, Inc.
    Inventor: H. Taylor Howard
  • Patent number: 4380014
    Abstract: An improved feed horn for use with long f/D reflector antennae comprising an aperture having a plurality of protuberances orthogonally disposed around the periphery thereof, a conical section, a waveguide transition section and an impedance matching section.
    Type: Grant
    Filed: August 13, 1981
    Date of Patent: April 12, 1983
    Assignee: Chaparral Communications, Inc.
    Inventor: H. Taylor Howard
  • Patent number: D272910
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: March 6, 1984
    Assignee: Chaparral Communications, Inc.
    Inventors: Robert B. Taggart, Howard H. Taylor
  • Patent number: RE32835
    Abstract: A rotatable polarized signal receiver in a system for receiving linearly polarized electromagnetic signals includes a signal conductor having a receiver probe portion, oriented in a circular waveguide parallel to the polarization of the incident signal, and signal launch probe portion extending into the rectangular waveguide orthogonal to the direction of signal transmission therein, mounted concentrically in an insulator rod through perpendicular coupling of the circular and rectangular waveguides.
    Type: Grant
    Filed: November 6, 1985
    Date of Patent: January 17, 1989
    Assignee: Chaparral Communications, Inc.
    Inventor: H. Taylor Howard