Patents Assigned to KMW Inc.
  • Patent number: 10897078
    Abstract: A base station apparatus of an antenna-integrated type for use in a mobile communication network, includes an enclosure configured to have electric and electronic devices for processing signals in receipt and to form at least a part of an exterior of the base station, and an antenna configured to be installed so as to be tiltable on one surface of the enclosure, to have an outer contour defined by a radome, to include at least one radiating element for transmitting and receiving a radio signal, and an enclosure fixing device configured to fixedly mount the enclosure to an external support, and an antenna fixing apparatus configured to fixedly install the antenna on the enclosure so that the antenna is adjustably tilted with respect to the enclosure.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: January 19, 2021
    Assignee: KMW INC.
    Inventors: In-Ho Kim, Oh-Seog Choi, Hee Kim
  • Patent number: 10886966
    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 includes 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: Grant
    Filed: May 17, 2019
    Date of Patent: January 5, 2021
    Assignee: KMW INC.
    Inventors: Young Chan Moon, Min Seon Yun, Sung-hwan So
  • Patent number: 10886610
    Abstract: A portable antenna control device includes: a main controller for generating a control signal for adjusting a device provided in an antenna; a modem unit for converting the control signal generated by the main controller into an on-off keying (OOK) signal; a power management unit for supplying direct current power; and an OOK port for synthesizing and outputting the OOK signal converted by the modem unit and the direct current power supplied by the power management unit.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: January 5, 2021
    Assignee: KMW INC.
    Inventors: Dong-Hun Lee, Ki-Hoon Woo, Sung-Hak Kim, Yong-Hyo Jeon
  • Patent number: 10847938
    Abstract: An antenna cable connection module in accordance with the present disclosure includes an antenna cable for forming a contact point connected to an antenna filter part; a body part located on the outer circumferential surface of the antenna cable, and inserted into a receiving port located on the antenna filter part together with the end portion of the antenna cable and coupled to the antenna filter part; and a bush interposed between the antenna cable and the body part, and having an inclined surface having a slope in a longitudinal direction formed thereon to strengthen the coupling between the antenna filter part and the antenna cable. As a result, it is possible to constitute a simple antenna cable connection module of a ground contact type, thus providing a device reducing the failure occurrence rate.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: November 24, 2020
    Assignee: KMW INC.
    Inventors: Sunghwan So, Seongman Kang, Eunsuk Jung
  • Patent number: 10847865
    Abstract: The present disclosure relates to an antenna alignment guide device between pieces of communication equipment, the device comprising: a sensor unit for sensing an azimuth of the alignment guide device and information on the location thereof; a user interface unit for displaying the information on the location sensed by the sensor unit and for receiving an operation setting input and information on the location of another device; and a fixing device for mounting, in an aligned state, the alignment guide device in a preset part of communication equipment on the basis of a wireless signal radiation direction of the communication equipment.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: November 24, 2020
    Assignee: KMW INC.
    Inventors: Dong-Hun Lee, Yong-Hyo Jun, Min-Ji Park
  • Patent number: 10847861
    Abstract: A resonator includes a housing having a cavity therein; a plurality of resonance plates which are arranged radially around a center of the cavity with a predetermined interval therebetween; and a plurality of legs each of which supports one of the plurality of resonance plates, respectively. A center of each of the plurality of legs is deviated from a center of a corresponding resonance plate.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: November 24, 2020
    Assignee: KMW INC.
    Inventor: Nam-Shin Park
  • Publication number: 20200365960
    Abstract: The present invention relates to a cavity filter and, particularly, to a cavity filter comprising: a resonance element including a coupling block; a first case including the resonance element therein; a second case arranged so as to cover one surface of the first case; a terminal unit penetrating the first case such that one end thereof is protrudingly provided so as to be connected to an electrode pad of an external member provided on the outside of the first case and the other end thereof is electrically connected to the coupling block of the resonance element provided to be close to the second case, wherein the terminal unit is electrically insulated from the first case; and an assembly unit provided on either one side or both sides in the lengthwise direction of the case, and having a terminal insertion hole in which the terminal unit is insertedly provided, wherein the assembly unit is formed to protrude to the outside from a lower surface of the first case.
    Type: Application
    Filed: July 31, 2020
    Publication date: November 19, 2020
    Applicant: KMW INC.
    Inventors: Duk Yong Kim, Sung Ho Jang, Joung Hoe Kim
  • Publication number: 20200350651
    Abstract: Disclosed herein is a radio frequency filter having a notch structure. The radio frequency filter includes a hollow housing having a plurality of partition walls defining a plurality of cavities and an open surface formed on one side, a cover configured to shield the open surface of the housing, a plurality of resonance elements positioned in the cavities of the housing, a coupling substrate arranged to cross a partition wall between at least two of the plurality of resonance elements, and a tuning screw inserted into the housing through the cover. The partition wall crossed by the coupling substrate includes a support window formed to have a first depth from the open surface, the coupling substrate being arranged through the support window, and a tuning window formed to have a second depth greater than the first depth from the open surface, the tuning screw being inserted into the tuning window.
    Type: Application
    Filed: July 15, 2020
    Publication date: November 5, 2020
    Applicant: KMW INC.
    Inventors: Sung Bae Park, Joung-hoe Kim, Nam-shin Park
  • Publication number: 20200343629
    Abstract: The present disclosure provides a shield wall for shielding multiple individual antenna modules of a massive MIMO antenna from each other. A shield wall according to at least one embodiment of the present disclosure is formed by a plurality of staple-shaped unit partitions arrayed longitudinally of the shield wall, wherein the unit partitions are designed to have optimal widths and heights according to the frequency band in use, and are arranged at a predetermined interval or less with reference to the frequency band in use, thereby providing an antenna structure which satisfies both the X-POL isolation and CO-POL isolation characteristics and can be easily fabricated in a compact, lightweight design.
    Type: Application
    Filed: July 9, 2020
    Publication date: October 29, 2020
    Applicant: KMW INC.
    Inventors: Inho Kim, Oh-seog Choi, Hyoung-seok Yang, Jeong Uk Park, Jin Suk Seo
  • Publication number: 20200321712
    Abstract: A dual-polarized antenna and a dual-polarized antenna assembly including the same are provided. A dual-polarized antenna includes a base board, feeding unit supported on the base board, and radiation plate supported on the feeding unit. The feeding unit includes a first and a second feeding boards arranged to cross each other on the base board. The first feeding board includes a first feed line configured to supply a first reference-phase signal to a first point on the radiation plate and supply a first antiphase signal having an antiphase relative to the first reference-phase signal to a second point on the radiation plate. The second feeding board includes a second feed line configured to supply a second reference-phase signal to a third point on the radiation plate and supply a second antiphase signal having an antiphase relative to the second reference-phase signal to a fourth point on the radiation plate.
    Type: Application
    Filed: June 19, 2020
    Publication date: October 8, 2020
    Applicant: KMW INC.
    Inventor: Yong Won Seo
  • Publication number: 20200305308
    Abstract: The present disclosure relates to a cooling apparatus for an electronic element, and includes a printed circuit board which has a plurality of electronic elements mounted on one surface, at least one of the plurality of electronic elements generating heat at operation, a board case which accommodates the printed circuit board, a cooling cover which has the inner surface in close contact with the other surface of the printed circuit board while covering the board case, and a plurality of radial cooling bodies which have at least one provided to protrude from the outer surface of the cooling cover, are each formed to extend to be inclined upward, and receive heat generated from the printed circuit board to dissipate the heat outward, thereby increasing an effective cooling area on a limited cooling portion to largely improve cooling performance.
    Type: Application
    Filed: June 4, 2020
    Publication date: September 24, 2020
    Applicant: KMW INC.
    Inventors: Duk Yong Kim, Jun Woo Yang, Jin Soo Yeo, Chang Woo Yoo, Min Sik Park, Hye Yeon Kim
  • Publication number: 20200305270
    Abstract: The present disclosure relates to a cooling apparatus for an electronic element, and particularly, includes a printed circuit board which has a plurality of electronic elements provided on one surface thereof as a unit heat-generating element, a housing main body which has the other surface of the printed circuit board accommodated to be in close contact therewith, and has a plurality of first cooling ribs provided to protrude from the outer surface thereof, an additional cooling part which is disposed to be spaced apart from the outer surface of the housing main body, and dissipates heat transferred from the housing main body, and a heat transfer part which has one end connected to the outer surface of the housing main body and the other end connected to the additional cooling part to transfer heat generated from the electronic element to the additional cooling part, thereby improving cooling performance.
    Type: Application
    Filed: June 5, 2020
    Publication date: September 24, 2020
    Applicant: KMW INC.
    Inventors: Duk Yong Kim, Jun Woo Yang, Jin Soo Yeo, Chang Woo Yoo, Min Sik Park, Hye Yeon Kim
  • Publication number: 20200295433
    Abstract: The present disclosure relates to a multiple-input and multiple-output antenna apparatus, and particularly, includes a housing, a ray dome which is coupled to the top of one side of the housing in a longitudinal direction, and has an antenna assembly disposed between the ray dome and the housing, a PCB assembly which is disposed at the bottom of the antenna assembly, a top cooling part which is coupled to the top of the other side of the housing in the longitudinal direction, has a battery and an FPGA assembly disposed between the top cooling part and the housing, and dissipates upward the heat discharged from the FPGA assembly, and a side cooling part which is coupled to protrude to one side in a width direction between the housing and the top cooling part and the other side in the width direction therebetween, and moves and dissipates the heat generated from the FPGA assembly to one side and the other side of the housing in the width direction, thereby improving cooling performance.
    Type: Application
    Filed: June 3, 2020
    Publication date: September 17, 2020
    Applicant: KMW INC.
    Inventors: Duk Yong Kim, Jun Woo Yang, Jin Soo Yeo, Chang Woo Yoo, Min Sik Park, Hye Yeon Kim
  • Patent number: 10777869
    Abstract: The present invention relates to a cavity type wireless frequency filter having a cross-coupling notch structure, the filter comprising a notch substrate provided for cross-coupling between at least two resonance elements among a plurality of resonance elements, wherein the notch substrate comprises: a main substrate, which is made of a non-conductive material and has the first and second coupling structures mechanically coupled with at least two resonance elements, respectively; and a conductive line which is implemented by a conductive pattern formed on the main substrate and transfers a signal of a first resonance element to a second resonance element by using a non-contact coupling method.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: September 15, 2020
    Assignee: KMW INC.
    Inventors: Joung-Hoe Kim, Sung-Ho Jang
  • Publication number: 20200287260
    Abstract: The present disclosure provides a cavity filter assembly installed with an RF filter having an empty area formed between the RF filter and a cavity filter body serving as a ground to reduce the parasitic capacitance by forming the cavity filter body with a first pocket portion configured to install the RF filter and a second pocket portion within the first pocket portion in a position to overlap a transmission line, thereby reducing the insertion loss of the RF filter, which when serving as a low-pass filter, can position the harmonics in the stopband further away from the cutoff frequency and thus effect improved frequency characteristics of the low-pass filter through improvements of, for example, the frequency characteristics in the stopband.
    Type: Application
    Filed: May 21, 2020
    Publication date: September 10, 2020
    Applicant: KMW INC.
    Inventors: Joung-hoe Kim, Sung Bae Park
  • Publication number: 20200244235
    Abstract: The present disclosure in some embodiments relates to a method of calibrating a power amplifier performance and an apparatus therefor, which provide an optimal calibration of the output characteristics of a power amplifier to all possible combinations in the input signal source by enabling individualized calibrations for changes in the output characteristics at room temperature and changing temperatures, thereby improving the performance of the power amplifier.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Applicant: KMW INC.
    Inventors: BaeMook Jeong, HyeRyeon Kim
  • Publication number: 20200244018
    Abstract: The present disclosure relates to a coaxial connector, and particularly, a coaxial connector including a fixing module which is connected to a first PCB, and a contact module which is coupled movably to the fixing module, and provided to be contactable to a second PCB facing the first panel, in which the contact module includes a contact body which is made of a conductive material, and has a hollow formed therein, a contact pin which is made of a conductive material, and disposed to penetrate the hollow of the contact body, and a contact insulator which is disposed in the hollow of the contact body to insulate the contact pin and the contact body by partitioning the contact pin and the contact body, and the contact module is configured so that the contact body, the contact pin, and the contact insulator are integrally formed to be assembled to the fixing module by a singular process, thereby providing the advantages which may reduce the cost of a product, and improve the quality of the product by improving a
    Type: Application
    Filed: April 10, 2020
    Publication date: July 30, 2020
    Applicant: KMW INC.
    Inventors: Nam Shin Park, Joung Hoe Kim, Jin Hoon Lim, Min Hee Lee, Ho Jin Hwang
  • Publication number: 20200228217
    Abstract: The present disclosure relates to a time division duplexing (TDD) sub-system of a distributed antenna system using a TDD mode. According to the present disclosure, a head-end unit of a distributed antenna system using a division duplexing mode has a TDD sub-system which includes a TDD sync detection module, a TDD sync replica module, a TDD sync self delay detection module, and a TDD sync operator delay detection module, whereby quickly detecting possible errors in the system operation, and more efficiently performing responsive servicing thereto.
    Type: Application
    Filed: March 24, 2020
    Publication date: July 16, 2020
    Applicant: KMW INC.
    Inventors: SeongMin Ahn, MinSeon Yun, SeokJin Lee
  • Patent number: 10707924
    Abstract: A distributed antenna system supporting MIMO service is disclosed. Some embodiments provide a distributed antenna system supporting MIMO communication, including first node, second node and one transmission line. The first node receives MIMO downlink signals of a plurality of MIMO services each including N (a natural number of 2 or more) MIMO downlink signals, and performs, for each MIMO service, frequency-conversion of N?1 MIMO downlink signals among the N MIMO downlink signals, to different frequency band from original frequency band, to generate N MIMO downlink signals without mutually overlapping frequency bands. The second node performs, for each MIMO service, frequency-conversion of the MIMO downlink signals having been frequency-converted by first node, in a complementary manner, to reconstruct the MIMO downlink signals of original frequency band. The single transmission line is used between the first node and second node for transmitting N downlink signals without mutually overlapping frequency bands.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: July 7, 2020
    Assignee: KMW INC.
    Inventors: Duk-yong Kim, Young-chan Moon, Bung-chul Kim, Sang-hyo Kang
  • Patent number: 10707563
    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: Grant
    Filed: March 8, 2018
    Date of Patent: July 7, 2020
    Assignee: KMW INC.
    Inventors: Sung-Hwan So, Hun-Jung Jung, Kwang-Seok Choi, Jae-Jung Choi