Sungkyunkwan University

Samsung Electro-mechanics Co., Ltd.

Hyundai Motor Company

Kia Corporation

Hongik University Industry-academia Cooperation Foundation

Emtelli Inc.

Keum Cheol Hwang

Nam Heung Kim

Myeong Woo Han

Young Sik Hur

Jeong Ki Ryoo

Dae Ki Lim

Won Wook So

Youngsik Hur

Jeongki Ryoo

Woncheol Lee

Yong Serk Kim

Ki Hong Lee

Jong Jin Park

Jong Min Park

Nak Kyoung Kong

Nam Ki Kim

Kang Yoon Lee

Dae Hee Lee

Dong In Kim

Young Jun Park

Sung Woo Lee

Won Cheol Lee

Yong-Serk Kim

Youngoo Yang

Jong Ho Moon

Seong Jin Oh

Sang Yun Kim

Byeong Gi Jang

Jung Yeon Kim

Ho Sung Choo

Jong Seon Lee

Yong-serk Kim

Oh Heon Kwon

Disclosed is an apparatus for selecting a high-quality golf ball, the apparatus including a measurer configured to transmit a signal toward a golf ball and receive a signal reflected from the golf ball or a signal transmitted through the golf ball; and an analyzer configured to select a golf ball by analyzing the received signal.

Apparatus for selecting high-quality golf ball

A laminated glass antenna structure includes: a lower glass sheet including a first surface facing inside and a second surface at the upper end thereof; an upper glass sheet including a third surface adjacent to the lower glass sheet; an adhesive film positioned between the upper glass sheet and the lower glass sheet; and an antenna unit including a plurality of microstrip patch unit cells provided on the second surface and the third surface with respect to a ground plane provided on the first surface.

Laminated glass antenna structure

An antenna apparatus includes: a ground plane including first sides parallel to a first direction and second sides parallel to a second direction, on a plane formed in the first and second directions; a dielectric layer disposed on the ground plane in a third direction; an antenna patch overlapping the ground plane in the third direction; and vias connected to the ground plane and passing through at least a portion of the dielectric layer. Edges of the vias at least partially overlap the first sides of the ground plane in the third direction.

Antenna apparatus

An antenna device is provided. The antenna device includes a first antenna patch configured to transmit and receive an RF signal in a first frequency bandwidth and disposed a first dielectric layer; a second antenna patch disposed on a second dielectric layer and coupled to the first antenna patch; a third antenna patch disposed on a third dielectric layer and coupled to the second antenna patch; and a fourth antenna patch configured to transmit and receive an RF signal in the second frequency bandwidth, wherein the second antenna patch includes a plurality of first sub-antenna patches that do not overlap the first antenna patch, and the third antenna patch includes a plurality of second sub-antenna patches that overlap the first sub-antenna patches.

Antenna device

An antenna apparatus may include: a feed via; a patch antenna pattern electrically connected to the feed via; and coupling patterns spaced apart from the patch antenna pattern and spaced apart from each other. At least one of the coupling patterns may protrude in a direction in which the at least one of the coupling patterns is spaced apart from the patch antenna pattern.

An antenna apparatus includes a ground plane; first and second patch antenna patterns disposed above and spaced apart from a first surface of the ground plane and from each other; a second feed via to provide a second feed path of the second patch antenna pattern, and disposed adjacent to an edge of the second patch antenna pattern; a first feed via to provide a first feed path of the first patch antenna pattern, and disposed adjacent to an edge of the first patch antenna pattern that is opposite to the second patch antenna pattern; a first coupling pattern disposed between the first patch antenna pattern and the second patch antenna pattern along the first direction; a ground via; and a second coupling pattern disposed between the second patch antenna pattern and the first coupling pattern along the first direction.

An antenna apparatus includes a ground plane; first and second patch antenna patterns disposed above and spaced apart from the ground plane, and spaced apart from each other; a first feed via providing a first feed path of the first patch antenna pattern through a first point disposed adjacent to an edge of the first patch antenna pattern in a direction spaced apart from the second patch antenna pattern; a second feed via providing a second feed path of the second patch antenna pattern through a second point disposed adjacent to an edge of the second patch antenna pattern in a direction spaced apart from the first patch antenna pattern; and a first coupling pattern spaced apart from the first and second patch antenna patterns between the first and second patch antenna patterns, and defining a first internal space exposed towards the first patch antenna pattern.

A case for an electronic device according to the present disclosure meta-groves having different structures and formed symmetrically, asymmetrically, periodically, or non-periodically or meta-patches attached symmetrically, asymmetrically, periodically, or non-periodically at positions where the meta-grooves are formed, thereby improving the performance of antennas. Accordingly, there is an effect that it is possible to usefully use a mobile electronic device including arranged antennas therein even in a 5G environment having a millimeter wave band.

Case for electronic device

A method using energy harvesting including receiving, by a relay node, first information signals transmitted from a source node and second information signals transmitted from a destination node, harvesting, by the relay node, energy using energy signals transmitted from the source node while bi-directionally relaying the first information signals and the second information signals; receiving, by the source node, information signals transmitted by the relay node; and receiving, by the destination node, the information signals relayed by the relay node. The source node, the relay node, and the destination node are devices for performing communication in a full-duplex mode.

Full-duplex relay communication method using energy harvesting, full-duplex relay communication system based on energy-harvesting, relay node device, and source node device

Disclosed herein is an active rectifier. The rectifier includes a rectifier unit, a driver unit, and a switching device control circuit unit. The rectifier unit includes first and fourth transistors configured to become conductive when the voltage of an alternating current (AC) input is negative and apply the current of the AC input to a rectifier capacitor, and second and third transistors configured to become conductive when the voltage of the AC input is positive and apply the current of the AC input to the rectifier capacitor. The driver unit outputs first to fourth drive control signals, and drives the first to fourth transistors. The switching device control circuit unit compares the first drive control signal and the second drive control signal with the AC input, and outputs switching device control signals to delay the first to fourth drive control signals based on the extents to delay.

Active rectifier capable of preventing reverse leakage current

Growing community of inventors

Seoul, South Korea

Keum Cheol Hwang