Having Diverse Size Resonators Patents (Class 315/39.65)
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Patent number: 7801448Abstract: An optical communication system is provided which includes an optical signal transmitter which communicates high bandwidth, high power frequencies. The optical signal transmitter includes a high efficiency/high power optical source such as an optical magnetron or a phased array source of electromagnetic radiation, and a modulator element. The modulator element may be within a resonance cavity of the high efficiency/high power optical source (intra cavity) or external to the cavity (extra cavity). The modulator element serves to modulate output radiation of the high efficiency/high power optical source to produce a modulated high frequency optical signal which may be transmitted through the air. The optical signal transmitter is particularly useful in providing the last mile connection between cable service operators and end users.Type: GrantFiled: July 5, 2007Date of Patent: September 21, 2010Assignee: Raytheon CompanyInventor: James G. Small
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Patent number: 7609001Abstract: An electromagnetic radiation source is disclosed that produces a single mode operation at a desired operating frequency. The electromagnetic radiation source is included in a wide variety of applications including a wireless power transmission system, a system for providing wireless/high-bandwidth communications in accordance with the present invention, a lighting system, an irradiation system, a weapons system, etc.Type: GrantFiled: December 6, 2006Date of Patent: October 27, 2009Assignee: Raytheon CompanyInventor: James G. Small
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Patent number: 7511251Abstract: A magnetron is provided including a yoke having an internal space, a first magnet provided at one end of the internal space, a second magnet provided at a second end of the internal space, the second magnet being axially spaced from the first magnet. Further, an anode cylinder that generates radio frequency energy may be provided axially between the first and second magnets, a first pole piece and a second pole piece may be provided proximate first and second openings of the anode cylinder, respectively. Additionally, the magnetron may also include a seal that intercepts external leakage, the seal may have an inward protrusion extending axially towards the anode cylinder; and a choke filter that intercepts external leakage provided proximate the seal.Type: GrantFiled: December 20, 2006Date of Patent: March 31, 2009Assignee: LG Electronics Inc.Inventors: Seung-Won Baek, Jong-Soo Lee
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Patent number: 7446484Abstract: A middle output electrodeless lighting system comprising: a resonator having a certain inner space and adapted to form a resonance mode by shielding a discharge of microwaves applied therein to the exterior and to allow a discharge of light generated to the exterior; an electrodeless bulb including a light emitting portion positioned in the inner space of the resonator to emit (generate) light upon plasmarizing light emitting materials filled therein by the microwaves applied to the resonator, and a supporting member to support the light emitting portion thus to allow the light emitting portion to be arranged up to a certain height in the inner space of the resonator; and an initial lighting unit disposed at one side of the inner space of the resonator to enhance concentration of microwaves toward the electrodeless bulb so as to stabilize an initial lighting of the electrodeless bulb.Type: GrantFiled: October 3, 2006Date of Patent: November 4, 2008Assignee: LG Electronics Inc.Inventor: Ji-Young Lee
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Patent number: 7265360Abstract: An electromagnetic radiation source is disclosed. The electromagnetic radiation source includes an anode having a first conductor, a second conductor positioned relative to the first conductor, a plurality of pole pieces coupled to at least one of the first conductor and the second, and at least one mechanical phase reversal positioned along the first conductor or second conductor. Adjacent pole pieces are separated by a gap. The electromagnetic radiation source also includes a cathode separated from the anode by an anode-cathode space, electrical contacts for applying a dc voltage between the anode and the cathode and establishing an electric field across the anode-cathode space, and at least one magnet arranged to provide a dc magnetic field within the anode-cathode space generally normal to the electric field.Type: GrantFiled: November 5, 2004Date of Patent: September 4, 2007Assignee: Raytheon CompanyInventors: C. Vincent Baker, James G. Small
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Patent number: 7257327Abstract: An optical communication system is provided which includes an optical signal transmitter which communicates high bandwidth, high power frequencies. The optical signal transmitter includes a high efficiency/high power optical source such as an optical magnetron or a phased array source of electromagnetic radiation, and a modulator element. The modulator element may be within a resonance cavity of the high efficiency/high power optical source (intra cavity) or external to the cavity (extra cavity). The modulator element serves to modulate output radiation of the high efficiency/high power optical source to produce a modulated high frequency optical signal which may be transmitted through the air. The optical signal transmitter is particularly useful in providing the last mile connection between cable service operators and end users.Type: GrantFiled: August 30, 2002Date of Patent: August 14, 2007Assignee: Raytheon CompanyInventor: James G. Small
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Patent number: 6787998Abstract: In an inner conductor of a coaxial gyrotron, which inner conductor is disposed on the cathode of the gyrotron and includes an entrance funnel, a center part and an exit funnel, axial corrugations are formed in the conductor by axial grooves formed into its wall such that they begin at the end of the entrance funnel and have, in the center part, an increasing depths up to the exit funnel, in which the depth again becomes steadily smaller, the corrugations being evenly distributed about the inner circumference of the inner conductor.Type: GrantFiled: February 14, 2003Date of Patent: September 7, 2004Assignee: Forschungszentrum Karlsruhe GmbHInventor: Olgierd Dumbrajs
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Patent number: 6759808Abstract: An apparatus and method which maintains plasma discharges (for instance 25) in containers (for instance 20) which have an internal section of 1 cm or less in width are described. The very small cross-section plasma discharges are useful in MEMS devices, in spectrometers and in spectroscopy.Type: GrantFiled: October 25, 2002Date of Patent: July 6, 2004Assignee: Board of Trustees of Michigan State UniversityInventors: Timothy A. Grotjohn, Jes Asmussen, Andy Wijaya
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Patent number: 6724146Abstract: An electromagnetic radiation source is provided which includes an anode and a cathode separated by an anode-cathode space. The source further includes electrical contacts for applying a dc voltage between the anode and the cathode and establishing an electric field across the anode-cathode space. At least one magnet is arranged to provide a dc magnetic field within the anode-cathode space generally normal to the electric field. A plurality of openings are formed along a surface of the anode which defines the anode-cathode space, whereby electrons emitted from the cathode are influenced by the electric and magnetic fields to follow a path through the anode-cathode space and pass in close proximity to the openings.Type: GrantFiled: November 27, 2001Date of Patent: April 20, 2004Assignee: Raytheon CompanyInventor: James G. Small