Patents by Inventor Torbjorn Johnson

Torbjorn Johnson 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: 8344826
    Abstract: A phased-array antenna filter and diplexer for a super economical broadcast system are provided. The filter and diplexer includes a signal divider tee diplexer, a receive filter and a transmit filter. The diplexer includes a tee branch point, an antenna port, a transmit port and a receive port. The receive filter includes a flat, multi-pole bandpass filter, an input port and an output port, where the input port is coupled to the diplexer receive port to define a receive signal path, from the tee branch point to the receive input port, that has a length of approximately one quarter receive wavelength. The transmit filter includes a folded, multi-pole bandpass filter, an input port and an output port, where the output port is coupled to the diplexer transmit port to define a transmit signal path, from the tee branch point to the transmit output port, that has a length of approximately one quarter transmit wavelength.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: January 1, 2013
    Assignee: SPX Corporation
    Inventors: Chris Rossiter, Robert Dunning, Torbjorn Johnson
  • Publication number: 20120220339
    Abstract: A base station for a cellular communication system is provided. The base station includes a transceiver and a phased-array antenna. The phased-array antenna includes a plurality of sectors, each of which includes a plurality of vertically-arranged antenna panels, each of which includes a plurality of radiators arranged in columns. The vertical spacing between the radiators in each column is a predetermined value, and the vertical spacing between the radiators in adjacent columns is one-half of the predetermined value.
    Type: Application
    Filed: May 7, 2012
    Publication date: August 30, 2012
    Applicant: SPX CORPORATION
    Inventors: Torbjorn Johnson, John Schadler
  • Patent number: 8199062
    Abstract: A parasitic element for a phased-array antenna radiator is provided. The radiator comprises a first dipole radiator including two coplanar monopole radiating elements disposed symmetrically about a radiation axis, a second dipole radiator, arranged orthogonally with respect to the first dipole radiator, including two coplanar radiating elements disposed symmetrically about the radiation axis, and a parasitic gain element, having a substantially elliptical shape, disposed above the first and second dipole radiators and centered on the radiation axis.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: June 12, 2012
    Assignees: SPX Corporation, Radio Innovation Sweden AB
    Inventors: Torbjorn Johnson, John Schadler, Gary Lytle
  • Patent number: 8175648
    Abstract: A super economical broadcast system and method are provided. The system includes a plurality of base transceiver stations that define a plurality of respective cells, each base transceiver station includes a phased-array antenna having a plurality of sectors, each sector has a plurality of vertically-arranged antenna panels, and each antenna panel has a plurality of vertically-arranged radiators disposed in at least two staggered columns. The method includes forming a horizontally and vertically shaped beam using a plurality of vertically-arranged antenna panels, in which each antenna panel has a plurality of vertically-arranged radiators disposed in at least two staggered columns, and transmitting a power distribution that has an essentially uniform field strength over a near zone, a middle zone and at least a portion of a far zone.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: May 8, 2012
    Assignees: SPX Corporation, Radio Innovation Sweden AB
    Inventors: Torbjorn Johnson, John Schadler
  • Patent number: 8159406
    Abstract: A phased-array antenna radiator for a super economical cellular communication system is provided. The phased-array antenna radiator comprises two dipole radiators. The first dipole radiator includes a first monopole radiating element supported by a first outer conductor, a second monopole radiating element supported by a second outer conductor, a first inner conductor, disposed within the first outer conductor and extending therethrough, having an upper termination, a first feed strap, attached to the upper termination of the first inner conductor, and a first stub, disposed within the second outer conductor and attached to the first feed strap.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: April 17, 2012
    Assignees: SPX Corporation, Radio Innovation Sweden AB
    Inventors: John Schadler, Gary Lytle, Andre Skalina, Torbjorn Johnson
  • Patent number: 8115696
    Abstract: A phased-array antenna panel for a super economical broadcast system is provided. The phased-array antenna panel system includes an antenna panel support member, a first pair of striplines and a second pair of striplines. The antenna panel support member includes a front reflector surface to support first and second columns of constantly-spaced, crossed-dipole radiators, a first pair of signal ground cavities disposed beneath the first column of crossed-dipole radiators, a second pair of signal ground cavities disposed beneath the second column of crossed-dipole radiators, and a rear surface including first and second pairs of signal distribution cable connectors. The first pair of striplines are respectively disposed within the first pair of signal ground cavities and are coupled to the first pair of signal distribution connectors and the first column of crossed-dipole radiators.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: February 14, 2012
    Assignees: SPX Corporation, Radio Innovation Sweden AB
    Inventors: Andre Skalina, Torbjorn Johnson, Charles Michael Davison, Jr., John Schadler, Gary Lytle
  • Publication number: 20100134374
    Abstract: A phased-array antenna panel for a super economical broadcast system is provided. The phased-array antenna panel system includes an antenna panel support member, a first pair of striplines and a second pair of striplines. The antenna panel support member includes a front reflector surface to support first and second columns of constantly-spaced, crossed-dipole radiators, a first pair of signal ground cavities disposed beneath the first column of crossed-dipole radiators, a second pair of signal ground cavities disposed beneath the second column of crossed-dipole radiators, and a rear surface including first and second pairs of signal distribution cable connectors. The first pair of striplines are respectively disposed within the first pair of signal ground cavities and are coupled to the first pair of signal distribution connectors and the first column of crossed-dipole radiators.
    Type: Application
    Filed: April 27, 2009
    Publication date: June 3, 2010
    Applicant: SPX Corporation
    Inventors: Andre Skalina, Torbjorn Johnson, Charles Michael Davison, JR., John Schadler, Gary Lytle
  • Publication number: 20090305710
    Abstract: A super economical broadcast system and method are provided. The system includes a plurality of base transceiver stations that define a plurality of respective cells, each base transceiver station includes a phased-array antenna having a plurality of sectors, each sector has a plurality of vertically-arranged antenna panels, and each antenna panel has a plurality of vertically-arranged radiators disposed in at least two staggered columns. The method includes forming a horizontally and vertically shaped beam using a plurality of vertically-arranged antenna panels, in which each antenna panel has a plurality of vertically-arranged radiators disposed in at least two staggered columns, and transmitting a power distribution that has an essentially uniform field strength over a near zone, a middle zone and at least a portion of a far zone.
    Type: Application
    Filed: May 4, 2009
    Publication date: December 10, 2009
    Applicant: SPX CORPORATION
    Inventors: Torbjorn Johnson, John Schadler
  • Publication number: 20090284325
    Abstract: A phased-array antenna filter and diplexer for a super economical broadcast system are provided. The filter and diplexer includes a signal divider tee diplexer, a receive filter and a transmit filter. The diplexer includes a tee branch point, an antenna port, a transmit port and a receive port. The receive filter includes a flat, multi-pole bandpass filter, an input port and an output port, where the input port is coupled to the diplexer receive port to define a receive signal path, from the tee branch point to the receive input port, that has a length of approximately one quarter receive wavelength. The transmit filter includes a folded, multi-pole bandpass filter, an input port and an output port, where the output port is coupled to the diplexer transmit port to define a transmit signal path, from the tee branch point to the transmit output port, that has a length of approximately one quarter transmit wavelength.
    Type: Application
    Filed: April 21, 2009
    Publication date: November 19, 2009
    Applicant: SPX Corporation
    Inventors: Chris Rossiter, Torbjorn Johnson, Robert Dunning
  • Patent number: 6161023
    Abstract: An access method using a rotating lobe in a telecommunication system that has antennas that support a number of horizontal lobes for communication between a base station and a mobile station. Signals to and from the antennas are modulated by a lobe shaping unit to bring the lobe to rotate in a horizontal plane, that the mobile station synchronizes with the base station transmission lobe by means of an internal clock, and after achieving synchronization goes into a sleep mode. The sleep mode has a number of wake up levels, wherein the mobile station in the deepest level listens for wake up calls and in the highest level listens for the proper message.
    Type: Grant
    Filed: December 29, 1998
    Date of Patent: December 12, 2000
    Assignee: Radio Design Innovation TJ AB
    Inventors: Torbjorn Johnson, Bo G. Magnusson
  • Patent number: 6088002
    Abstract: An antenna system including a support structure and an antenna assembly having an open grid reflector structure in a closed ring and dipole elements. The antenna assembly includes a number of antenna panels, each including a number of the dipole elements, the closed ring is self-supporting and connected to the support structure by radial beams and struts, and the antenna panels are interconnected by a variable angle connection.
    Type: Grant
    Filed: December 29, 1998
    Date of Patent: July 11, 2000
    Assignee: Radio Design Innovation TJ AB
    Inventors: Torbjorn Johnson, Jan Berglund