Patents by Inventor Sung-Hwan So

Sung-Hwan So 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).

  • Publication number: 20190280732
    Abstract: Disclosed herein are a method for eliminating passive intermodulation distortion (PIMD) and an antenna apparatus using the same. According to an embodiment, the antenna apparatus incudes a main antenna used for transmission and reception of an RF signal; an auxiliary antenna used for reception of an RF signal; and a passive intermodulation distortion (PIMD) eliminator configured to calculate PIMD contained in a received signal of the main antenna using a received signal of the auxiliary antenna, and to eliminate the calculated PIMD from the received signal of the main antenna.
    Type: Application
    Filed: May 17, 2019
    Publication date: September 12, 2019
    Inventors: Young Chan MOON, Min Seon YUN, Sung-hwan SO
  • Patent number: 10249940
    Abstract: A signal distributing/combining apparatus in an antenna device of a mobile communication base station includes a circuit board configured to have an upper surface formed with a signal distributing/combining conductor pattern for a high frequency signal distributing/combining operation, and a support plate configured to have an upper mounting surface of a size corresponding to the circuit board, to mate with the circuit board so that an underside of the circuit board is in close contact with the upper mounting surface for supporting the circuit board, and to fixedly mate with the antenna device at a reflection plate on a bottom side of the support plate. The support plate is provided with a plurality of cable holders for supporting and fixating coaxial cables for signal transmission which are connected from outside of the apparatus.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: April 2, 2019
    Assignee: KMW INC.
    Inventors: Young-Chan Moon, Sung-Hwan So, Hun-Jung Jung, Kwang-Seok Choi, Jae-Jeng Choi
  • Publication number: 20180337438
    Abstract: A phase shifter according to at least one embodiment of the present disclosure has a housing provided on both surfaces with respective shifting units. Each shifting unit is composed of a fixed board and a moving board. Movement of the moving board causes a phase-shifted signal to be simultaneously transferred from both surfaces of the housing to output ports. This allows more effective use of the space of the phase shifter and therearound.
    Type: Application
    Filed: July 31, 2018
    Publication date: November 22, 2018
    Inventors: Sung-hwan SO, Seong-man KANG, Eun-suk JUNG, Dae-myung PARK, Sang-hun LEE
  • Patent number: 10090912
    Abstract: The present invention is an antenna system of a mobile communication base station, comprising: a signal separation unit which is arranged within a radome of an antenna, and which separates a synthetic signal of a wireless signal transmitted from a main system of a base station through a feeder cable, a direct current power signal and a control signal having a preset format for controlling the antenna, in such a manner that the direct current power signal and the control signal are output by being separated from the wireless signal and the wireless signal is provided to an antenna unit; and equipment to be remotely controlled having a modem for receiving the direct current power signal and the control signal output from the signal separation unit and using the direct current power signal as an operating power and converting the control signal into a format which is preset to be internally recognizable in the radome of the antenna, the equipment to be remotely controlled performing an antenna control operation
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: October 2, 2018
    Assignee: KMW INC.
    Inventors: Young-Chan Moon, Sung-Hwan So, Jong-Han Kim, Goog-Seong Jeong, Dong-Hun Lee, Ki-Hoon Woo
  • Patent number: 10033110
    Abstract: The present invention relates to a multi-band, multi-polarized wireless communication antenna, which comprises: a reflector; at least one first radiation module of a first band which is installed on the reflector; and at least one second or third radiation module of a second band or a third band installed on the reflector, wherein the first radiation module comprises first to fourth radiating elements having a dipole structure, the first to fourth radiating elements are configured such that every two radiating arms thereof are connected in the shape of letter “¬”, one of the two radiating arms is configured to be placed side by side along side of the reflector, and the second or third radiation module is installed to be included within an installation range of the first radiation module.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: July 24, 2018
    Assignee: KMW INC.
    Inventors: Young-Chan Moon, Sung-Hwan So, Soon-Wook Kim, Jae-Hwan Lim, Seong-Ha Lee
  • Publication number: 20180198191
    Abstract: A multi-polarized radiating element of the present disclosure includes first, second, third, and fourth radiating arms arranged in a four-way symmetrical manner on a plane; a first feeding line commonly fed to the fourth radiating arm and the first radiating arm, and commonly grounded to the second radiating arm and the third radiating arm; and a second feeding line commonly fed to the first radiating arm and the second radiating arm, and commonly grounded to the third radiating arm and the fourth radiating arm.
    Type: Application
    Filed: March 8, 2018
    Publication date: July 12, 2018
    Inventors: Sung-Hwan SO, Hun-Jung JUNG, Kwang-Seok CHOI, Jae-Jung CHOI
  • Publication number: 20180108962
    Abstract: A multi-line phase shifter of a multi-band mobile communication base station antenna includes: a multi-line phase shifting circuit for receiving an input signal of a first frequency band, and dividing and phase-shifting the input signal so as to correspond to a plurality of radiation elements; and a plurality of frequency combination/division circuits for receiving a plurality of signals divided and phase-shifted by the multi-line phase shifting circuit and a plurality of signals of a second frequency band which have been inputted by being divided and phase-shifted for a plurality of radiation elements by an external multi-line phase shifter, combining corresponding signals, and outputting the same to the plurality of radiation elements.
    Type: Application
    Filed: December 15, 2017
    Publication date: April 19, 2018
    Inventors: Sung-Hwan SO, Hun-Jung JUNG, Kwang-Seok CHOI
  • Patent number: 9917361
    Abstract: The present invention relates to a variable beam control antenna for a mobile communication system, the antenna comprising: a radome formed on the front surface at which a signal is emitted; multiple emitters vertically arranged in at least one row; a frame portion for supporting the radome and the multiple emitters; and a direction-changing module which rotates each of the multiple emitters vertically and horizontally with respect to a reference point in order to change the emission direction of the multiple emitters.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: March 13, 2018
    Assignee: KMW INC.
    Inventors: Young-Chan Moon, Sung-Hwan So, In-Ho Kim, Oh-Seog Choi, Hyoung-Seok Yang
  • Patent number: 9913129
    Abstract: The present disclosure in some embodiments provides an antenna control system wherein multiple primaries perform selective communications with antenna line devices (ALDs) and its operation method. Some embodiments provide an antenna control system including a switching unit which is interconnected between at least one functional unit for controlling an antenna of a radio base station and a plurality of control devices for transmitting a control signal to the functional unit so as to control as well as power the functional unit, and is configured to selectively electrically connect any of the plurality of control devices to the functional unit.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: March 6, 2018
    Assignee: KMW INC.
    Inventors: Sung Hwan So, Myoung Sik Lee, Dong Hun Lee
  • Publication number: 20180006363
    Abstract: A signal distributing/combining apparatus in an antenna device of a mobile communication base station includes a circuit board configured to have an upper surface formed with a signal distributing/combining conductor pattern for a high frequency signal distributing/combining operation, and a support plate configured to have an upper mounting surface of a size corresponding to the circuit board, to mate with the circuit board so that an underside of the circuit board is in close contact with the upper mounting surface for supporting the circuit board, and to fixedly mate with the antenna device at a reflection plate on a bottom side of the support plate. The support plate is provided with a plurality of cable holders for supporting and fixating coaxial cables for signal transmission which are connected from outside of the apparatus.
    Type: Application
    Filed: September 15, 2017
    Publication date: January 4, 2018
    Inventors: Young-Chan MOON, Sung-Hwan SO, Hun-Jung JUNG, Kwang-Seok CHOI, Jae-Jeng CHOI
  • Publication number: 20170244159
    Abstract: A mobile communication base station antenna includes: a reflecting plate; a first patch-type radiating element installed on the reflecting plate; a second dipole-type radiating element installed and stacked on the first radiating element; and a circuit board for feeding power installed on the same surface as a surface of the reflecting plate on which the first radiating element and the second radiating element are installed and having a conductive pattern formed thereon to provide a feeding signal to the first radiating element.
    Type: Application
    Filed: May 10, 2017
    Publication date: August 24, 2017
    Inventors: Young-Chan MOON, Sung-Hwan SO, Soon-Wook KIM, Jae-Hwan LIM, Seong-Ha LEE
  • Publication number: 20170179589
    Abstract: The present disclosure relates to an antenna device for a mobile communication system, including a reflection plate, a service band separator/coupler and a radome. The reflection plate is configured in a plate shape, multiple radiation elements being mounted on one surface of the reflection plate so as to transmit/receive radio signals. The service band separator/coupler is installed on the other surface of the reflection plate so as to separate/couple the service band of the corresponding antenna device. The radome is configured in the shape of an integrated barrel that surrounds the reflection plate and the service band separator/coupler as a whole.
    Type: Application
    Filed: March 3, 2017
    Publication date: June 22, 2017
    Inventors: Sung-Hwan So, Seong-Man Kang, Eun-Suk Jung, Sang-Hun Lee, Dae-Myung Park
  • Patent number: 9667277
    Abstract: Provided is an apparatus for tuning the voltage standing wave ratio (VSWR) of a base station system in a wireless communication network, the apparatus comprising: a VSWR changing unit for changing the characteristics of the VSWR of an antenna by changing electrical signal transmission characteristics of an internal power feedline by means of an external operation, or by changing the characteristics for transceiving a radiating member; a driving unit for driving the VSWR changing unit in accordance with a control signal; a VSWR detection unit for detecting the corresponding VSWR for the installed antenna and generating a detection signal on the basis thereof; and a control unit for controlling the actions of the VSWR changing unit for changing the VSWR characteristics by controlling the operation of the driving unit, if a VSWR characteristic is determined to be in an abnormal state on the basis of the detection signal generated by the VSWR detection unit.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: May 30, 2017
    Assignee: KMW INC.
    Inventors: Young-Chan Moon, Sung-Hwan So, In-Ho Kim, Oh-Seog Choi
  • Publication number: 20160316359
    Abstract: The present disclosure in some embodiments provides an antenna control system wherein multiple primaries perform selective communications with antenna line devices (ALDs) and its operation method. Some embodiments provide an antenna control system including a switching unit which is interconnected between at least one functional unit for controlling an antenna of a radio base station and a plurality of control devices for transmitting a control signal to the functional unit so as to control as well as power the functional unit, and is configured to selectively electrically connect any of the plurality of control devices to the functional unit.
    Type: Application
    Filed: April 20, 2016
    Publication date: October 27, 2016
    Inventors: Sung Hwan So, Myoung Sik Lee, Dong Hun Lee
  • Publication number: 20160248166
    Abstract: The present invention relates to a multi-band, multi-polarized wireless communication antenna, which comprises: a reflector; at least one first radiation module of a first band which is installed on the reflector; and at least one second or third radiation module of a second band or a third band installed on the reflector, wherein the first radiation module comprises first to fourth radiating elements having a dipole structure, the first to fourth radiating elements are configured such that every two radiating arms thereof are connected in the shape of letter “”, one of the two radiating arms is configured to be placed side by side along side of the reflector, and the second or third radiation module is installed to be included within an installation range of the first radiation module.
    Type: Application
    Filed: May 2, 2016
    Publication date: August 25, 2016
    Inventors: Young-Chan Moon, Sung-Hwan So, Soon-Wook Kim, Jae-Hwan Lim, Seong-Ha Lee
  • Publication number: 20160248158
    Abstract: The present invention relates to a multi-band antenna, which comprises: a first antenna array of a first band configured by a radiation module of the first band; a (2-1)th antenna array of a common band between a second band and third band, the (2-1)th antenna array including radiation modules for the common band between the second band and third band; a (2-1)th phase shifter for receiving an input signal of the second band, distributing signals having phase difference therebetween to pre-configured radiation modules or groups of multiple radiation modules among the radiation modules of the (2-1)th antenna array, respectively, and then providing the signals; a (3-1)th phase shifter for receiving an input signal of the second band, distributing signals having phase difference therebetween to pre-configured radiation modules or groups of multiple radiation modules among the radiation modules of (2-1)th antenna array, respectively, and then providing the signals; a plurality of (2-1)th frequency combiners for co
    Type: Application
    Filed: May 5, 2016
    Publication date: August 25, 2016
    Inventors: Sung-Hwan So, Hun-Jung Jung
  • Publication number: 20160233917
    Abstract: The present invention relates to a device for forming a wireless high-frequency signal path, comprising: a plurality of output ends respectively connected so as to correspond to a plurality of antenna arrays; a plurality of input ends respectively connected so as to correspond to a plurality of amplifiers; a switching module for forming a path for variably connecting each of the plurality of input ends to one selected from the plurality of output ends according to a switching control signal; and a control unit for receiving an external command and outputting a switching control signal for controlling a switching operation of the switching module according to the external command.
    Type: Application
    Filed: April 18, 2016
    Publication date: August 11, 2016
    Inventors: Young-Chan Moon, Sung-Hwan So, Myong-Sik Lee, Dong-Hun Lee, Yong-Hyo Jeon
  • Patent number: 9379435
    Abstract: The present invention relates to an antenna of a mobile communication base station, comprising; an RET driving unit, an RAS driving unit, and an RAB driving unit, each comprising a driving motor, for driving electrical and mechanical devices for respectively adjusting RET, RAS and RAB; and multi-function equipment for controlling the driving of the RET driving unit, the RAS driving unit and the RAB driving unit by communicating with a main system of a base station such that at least a control signal for controlling the RET, the RAS, and the RAB is received.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: June 28, 2016
    Assignee: KMW Inc.
    Inventors: Young-Chan Moon, Sung-Hwan So, Dong-Hun Lee, Ki-Hoon Woo
  • Publication number: 20160064815
    Abstract: The present invention relates to a base station antenna for mobile communication, the antenna, equipped with horizontally arranged radiating elements and connected to a base station system, comprising: a reflective plate disposed in the interior of a multiple-input multiple-output antenna; a plurality of antennas disposed on the planar surface of the reflective plate; and a moving unit for moving the plurality of antennas vertically within the range of the planar surface of the reflective plate.
    Type: Application
    Filed: September 4, 2015
    Publication date: March 3, 2016
    Inventors: Young-Chan Moon, Sung-Hwan So, In-Ho Kim, Oh-Seog Choi
  • Patent number: 9276323
    Abstract: The present invention relates to a dual polarization antenna comprising a reflection plate, and a radiating module including first to fourth radiating elements having respective first to fourth radiating arms having respective bent portions. The bent portions of the first to fourth radiation arms are sequentially adjacent to each other, and sequentially form and shaped structures. The and shaped structures are located on a third quadrant, a fourth quadrant, a second quadrant, and a first quadrant, respectively. The first to fourth radiating elements have supports integrally extending from the bent portions of the first to fourth radiating arms to the reflection plate. The radiating module includes a first feeder line installed to transmit signals to the first and third radiating arms, and a second feeder line installed to transmit signals to the second and fourth radiating arms.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: March 1, 2016
    Assignee: KMW Inc.
    Inventors: Young-Chan Moon, Sung-Hwan So, In-Ho Kim