Patents by Inventor Hoon YUN

Hoon YUN 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: 8330661
    Abstract: Provided is a system and method for measuring an antenna radiation pattern in a Fresnel region based on a phi-variation method. The system includes a rotator for changing angles of a reference antenna and a target antenna; a vector network analyzer for obtaining radiation pattern data in accordance with transmission/reception radio frequency (RF) signals between the reference antenna and the target antenna; a measurement unit for calculating a far-field radiation pattern based on the radiation pattern data received from the vector network analyzer; and a controller for controlling the rotator according to a measurement angle transmitted from the measurement unit.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: December 11, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Soon-Soo Oh, Yong-Hee Cho, Je-Hoon Yun, Joung-Myoun Kim, Jung-Ick Moon
  • Publication number: 20120223591
    Abstract: Provided is a power transmission device including a transmission unit and a reception unit. The reception unit includes an overvoltage protection circuit and provides a feedback signal to the transmission unit. The transmission unit controls intensity of power wirelessly transmitted to the reception unit with reference to the feedback signal to control power consumption of the overvoltage protection circuit. The overvoltage protection circuit includes a detection unit and a current control unit. The detection unit detects an input voltage and a first current to generate a control signal. The current control unit controls a second current with reference to the control signal. Herein, the second current is controlled so that a ratio of the input voltage to a sum of the first and second currents is kept constant.
    Type: Application
    Filed: February 6, 2012
    Publication date: September 6, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sang Hoon Cheon, Yong Hae Kim, Seung Youl Kang, Myung Lae Lee, Je Hoon Yun
  • Patent number: 8228132
    Abstract: A voltage-controlled oscillator robust against power supply includes: a regulating unit configured to maintain a virtual power supply of a VCO core circuit in a stable condition with regard to a reference voltage; and a power supply removal unit including second transistors configured to correspond to respective first transistors of the regulating unit, the power supply removal unit being configured to remove power noise of the virtual power supply by using negative feedback through a closed-circuit loop formed by each of the first and second transistors.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: July 24, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Young-Ho Kim, Je-Hoon Yun
  • Publication number: 20120161542
    Abstract: A system for reducing a radiation field in a wireless power transmission system includes a signal generation unit, a power amplification unit, a signal detection unit, a standing wave ratio (SWR) calculation unit and a control unit. The signal generation unit receives power and generates a signal for wireless power transmission. The power amplification unit amplifies the wireless signal generated by the signal generation unit. The signal detection unit detects a radiation signal generated by the magnetic resonator with respect to output power of the power amplification unit. The SWR calculation unit calculates an SWR using the detected radiation signal. The control unit selects a frequency having a lowest SWR based on the SWR calculated by the SWR calculation unit, and controls the signal generation unit to generate the signal for the wireless power transmission using the selected frequency.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 28, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seong-Min KIM, In-Kui Cho, Je-Hoon Yun, Jung-Ick Moon, Seung-Youl Kang, Yong-Hae Kim, Sang-Hoon Cheon, Myung-Lae Lee, Woo-Jin Byun, Chang-Joo Kim
  • Publication number: 20120161899
    Abstract: A 4-port strip line cell for generating standard near fields includes an upper conductor, a third port, a first port, a lower conductor, a second port and a fourth port. The third port supplies a power signal to the upper conductor. The first port terminates the upper conductor. The lower conductor is disposed to be spaced apart from the upper conductor. The second port is connected to the lower conductor so as to supply a power signal in the opposite direction of the third port. The fourth port terminates the lower conductor.
    Type: Application
    Filed: November 15, 2011
    Publication date: June 28, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RSEARCH INSTITUTE
    Inventor: Je Hoon YUN
  • Publication number: 20120161540
    Abstract: Disclosed is an energy transmitting apparatus in an energy system, including: a transmit feeding cable configured to be applied with AC power; a transmit inductor in which AC current for an AP power supply flows; a transmit metal electrode configured to transmit the AC power to a receive metal electrode by the AC current flowing the transmit inductor; and a transmit grounding bar configured to control at least one of a position, a length, and a diameter thereof to control a resonance frequency generated by the transmit inductor.
    Type: Application
    Filed: December 21, 2011
    Publication date: June 28, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jung-Ick MOON, Je-Hoon Yun, In-Kui Cho, Seong-Min Kim
  • Publication number: 20120157021
    Abstract: Disclosed is an apparatus for wirelessly transmitting and receiving energy and data including: a signal generator generating a first frequency signal for power transmission; a first matching circuit matching input/output impedance upon receiving the first frequency signal generated by the signal generator; an oscillator outputting a second frequency signal, a carrier frequency, by using the first frequency signal, generated by the signal generator, as a reference frequency; a mixer modulating a data signal output from a communication module by using the second frequency signal; a second matching circuit matching input/output impedance upon receiving a modulated signal by using the second frequency signal; a resonator resonating an output signal from the first matching circuit to a reception side apparatus; and a radiator radiating an output signal from the second matching circuit to the reception side apparatus.
    Type: Application
    Filed: November 9, 2011
    Publication date: June 21, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jung Ick Moon, In Kui Cho, Seong Min Kim, Je Hoon Yun, Woo Jin Byun, Kwang Seon Kim, Bong Su Kim, Min Soo Kang
  • Publication number: 20120133214
    Abstract: A direct feeding apparatus for impedance matching of a wireless power transmission device includes a helical type resonator, and a feeding unit configured to directly feed power to a region having a relatively small current value as compared to a center of a conductive line of the resonator.
    Type: Application
    Filed: November 25, 2011
    Publication date: May 31, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Je-Hoon YUN, In-Kui Cho, Jung-Ick Moon, Seong-Min Kim, Dong-Hee Park
  • Publication number: 20120098349
    Abstract: Provided is a wireless power transfer device. The wireless power transfer device includes: a base substrate including a base coil; transmission substrates spaced from the base substrate and including transmission coils; and a contact plug penetrating the base substrate and the transmission substrates to connect one ends of the transmission coils; wherein the transmission coils have the greater turn number than the base coil and transmitting/receiving a power signal through a magnetic resonance method.
    Type: Application
    Filed: October 11, 2011
    Publication date: April 26, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Yong Hae KIM, Seung Youl Kang, Sang Hoon Cheon, Myung Lae Lee, Je Hoon Yun, In Kui Cho, Jung Ick Moon, Seong-Min Kim
  • Patent number: 8161763
    Abstract: A refrigerator control method is disclosed which ensures efficient operation of a compressor. To control a refrigerator including a compressor, a first evaporator and a second evaporator connected to the compressor, and a refrigerant control valve that controls introduction of a refrigerant into the first evaporator and the second evaporator, the refrigerator control method includes operating the compressor, and controlling the opening and closing of the refrigerant control valve, to reduce not only consumption of electricity by the compressor, but also a pressure difference between an entrance and an exit of the compressor upon starting of the compressor.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: April 24, 2012
    Assignee: LG Electronics Inc.
    Inventors: Young Hoon Yun, Hyoung Keun Lim, Gye Young Song
  • Patent number: 8164506
    Abstract: An electromagnetic absorber using resistive material includes a ground plane of a conductive material; a dielectric layer formed on the ground plane; and a pattern layer in which specific unit cell patterns made of a resistive material are periodically arranged on the dielectric layer. The electromagnetic absorber is applied to an electronic toll collection system, a transportation device, a building structure, an electronic device and an anechoic chamber.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: April 24, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dong-Uk Sim, Jong Hwa Kwon, Sang Il Kwak, Je Hoon Yun, Chang-Joo Kim
  • Patent number: 8159412
    Abstract: Provided is an isolation antenna for a repeater which can acquire high isolation by using loop and dipole antennas, which are positioned in opposite directions to each other based on a shielding means, in a unidirectional repeater generally used in broadcasting or wireless communications even though transmitting antenna/receiving antennas having a co-channel are set up closely to each other. The transmitting/receiving isolation antenna includes: a shielding means including an electric conductor; a first antenna of a dipole antenna type in one side of the shielding means; and a second antenna of a loop antenna type in an opposite side of the shielding means where the first antenna is positioned.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: April 17, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Je-hoon Yun, Soon-ik Jeon, Jong-sik Lim, Jung-ick Moon, Joung-myoun Kim, Seung-won Kim, Yong-tae Lee, Chang-joo Kim
  • Publication number: 20120049986
    Abstract: An apparatus for reducing a radiation power and an electric field includes a transmission end energy transfer unit configured to include a feeding roof and a transmission coil, a receiving end energy transfer unit configured to be symmetrically separated from the transmission end energy transfer unit at a predetermined distance, and to include a receiving roof and a receiving coil, a first electric field shield configured to be made of a nonconductor, to have a shape surrounding the transmission end energy transfer unit, and to have an empty space of a predetermined first thickness; and a second electric field shield to be made of a nonconductor, to have a shape surrounding the receiving end energy transfer unit, and to have an empty space of a predetermined second thickness, wherein the empty spaces are filled with a dielectric material for shielding the electric field.
    Type: Application
    Filed: December 21, 2010
    Publication date: March 1, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: In-Kui CHO, Je-Hoon Yun, Seong-Min Kim, Jung-Ick Moon
  • Publication number: 20120019075
    Abstract: A wireless power transfer apparatus includes: a transmitting coil into which a current having a predetermined frequency is introduced; a receiving coil configured to supply a current induced by electromagnetic induction to a load; and a transmission-side resonant coil and a reception-side resonant coil positioned between the transmitting coil and the receiving coil, configured to provide the current flowing in the transmitting coil to the receiving coil through electromagnetic induction, and spaced a predetermined distance from each other. Each of the resonant coils has a spiral structure.
    Type: Application
    Filed: July 20, 2011
    Publication date: January 26, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: In-Kui CHO, Je-Hoon YUN, Jung-Ick MOON, Seong-Min KIM
  • Publication number: 20110299590
    Abstract: An error resilient coding method using adaptive additional image information is provided comprising determining a priority order of header data, adaptively configuring additional image information according to the priority order, and coding the additional image information and adding the coded additional image information to original image information.
    Type: Application
    Filed: February 9, 2011
    Publication date: December 8, 2011
    Inventors: Ju Hun Nam, Woon Moon Lee, Sung Hoon Yun, Jin Hyung Kim, Sung Jea Ko
  • Publication number: 20110299149
    Abstract: An electrochromic transparent plate which can enhance a response speed and a method for manufacturing the same are disclosed. The electrochromic transparent plate includes a pair of transparent plates spaced apart a predetermined distance from each other; a pair of transparent electrodes provided in the pair of the transparent plates, respectively; a cathodic coloration layer provided on one of the pair of the transparent electrodes, to represent a color in a cathodic state; an anodic coloration layer provided on the other one of the pair of the transparent electrodes, in opposite to the cathodic coloration layer, to represent a color in an anodic state; and an electrolyte layer provided between the cathodic coloration layer and the anodic coloration layer, to move an electron between the cathodic coloration layer and the anodic coloration layer there through as intermediate.
    Type: Application
    Filed: November 5, 2009
    Publication date: December 8, 2011
    Inventors: Sun Hoo Park, Young Hoon Yun, Yoo Kang Ji
  • Patent number: 8035572
    Abstract: Provided is an H-type monopole isolation antenna. The antenna provides an H-type monopole isolation antenna which can gain a high bi-directional transmitting/receiving isolation between a transmitting antenna and a receiving antenna of co-channel/co-polarization by including an antenna symmetrically positioned in right/left sides based on a covering means. A transmitting/receiving isolation antenna for maintaining high isolation between a transmitting signal and a receiving signal includes a cover which includes a conductor; and first and second antennas which are bisymmetrically positioned in right and left parts of the covering means and separately operated as a transmitting antenna or a receiving antenna. The antenna is used in a co-channel bi-direction repeater system.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: October 11, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Je-hoon Yun, Joung-myoun Kim, Ung-hee Park, Soon-ik Jeon
  • Patent number: 8018380
    Abstract: There is a provided a system for measuring an antenna radiation pattern in a Fresnel region, including: a fixed antenna and a movable antenna located in the Fresnel region to acquire a far-field radiation pattern; a moving unit for moving upward or downward to adjust a measuring angle of the movable antenna; a rotation unit to rotate a rotation shaft horizontally; a vector network analyzing unit for outputting an radio frequency (RF) signal to one of the fixed antenna and the movable antenna as a transmission antenna, receiving the RF signal received through the other one of the fixed antenna and the movable antenna as a receiving antenna, and detecting a complex value; a control and communication unit for controlling the vector network analyzing unit and a control unit, and performing a data communication; and the control unit for providing a vertical/horizontal rotation force to the moving unit and the rotation unit under a control of the control and communication unit.
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: September 13, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Soon-Soo Oh, Je-Hoon Yun, Jung-Ick Moon, Joung-Myoun Kim, Yong-Heui Cho
  • Patent number: 8004369
    Abstract: An electromagnetic-wave suppression structure in a multilayer PCB or package structure is supplied with a power to be used therein by a power distribution network including a power plane and a ground plane. The multilayer PCB and package includes: an electromagnetic-wave suppression structure including an electromagnetic band-gap; and the electromagnetic-wave suppression structure is formed at a specific portion(s) of the power plane and/or the ground plane to suppress noises.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: August 23, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jong Hwa Kwon, Dong-Uk Sim, Sang Il Kwak, Je Hoon Yun, Chang-Joo Kim
  • Publication number: 20110194811
    Abstract: Provided are a fiber optic rotary joint, an antenna having the same, an antenna measurement system, and a wireless communication system. An antenna measurement system includes an electro-optic converting unit for converting an electric signal to an optical signal, a first optical fiber for transferring the converted optical signal from the electro-optic converting unit, a second optical fiber having a diameter larger than the first optical fiber and transferring the optical signal outputted from the first optical fiber, an align unit for aligning the first optical fiber with the second optical fiber, and an opto-electric converting unit for converting the optical signal outputted from the second optical fiber to the electric signal.
    Type: Application
    Filed: July 16, 2009
    Publication date: August 11, 2011
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: In-Kui Cho, Sung-Woong Choi, Je-Hoon Yun