Yonsei University

Lg Electronics Inc.

Samsung Electronics Co., Ltd.

Byung-Wook Min

Donghyun Lee

Kwangseok Noh

Dongkyu Kim

Jaehoon Chung

Jinmin Kim

Kyutae Park

Sung Eun Kim

Taewan Kim

Michael Choi

Youngjoo Lee

Young Joo Lee

Jounghyun Yim

Hyungyu Kim

Hae-Gwon Park

Kyu Jong Choi

Kiryong Song

Bosung Suh

An attenuator includes: a first transmission line connected between a first terminal and a first node; a second transmission line connected between the first node and a second terminal; a first resistor connected between the first terminal and a ground node; a second resistor connected between the second terminal and the ground node; and a third resistor connected between the first node and the ground node, wherein the first and second resistors each have a resistance that is higher than a resistance of the third resistor.

Attenuator including nonuniform resistors and apparatus including the same

A phased array antenna comprises a plurality of unit cells arranged in an array. Each of the plurality of unit cells comprises: at least one radiating element receiving a feed signal and radiating a signal; and two path changeover switches for transmitting the applied feed signal as it is or as a distribution to the at least one radiating element, or at least one unit cell disposed adjacent, under control of an antenna control circuit.

Scalable and reconfigurable phased array antenna and method for manufacturing the same

An antenna device comprises: a first antenna; a second antenna; and a plurality of single decoupling network circuits DN_-DN_n which electromagnetically connect the first antenna and second antenna and remove a self-interference signal, wherein a multi-stage decoupling network circuit in which the DN_-DN_n are dependent-connected can be configured such that a Yparameter of the multi-stage decoupling network circuit becomes equal to or lower than a predetermined value on frequencies f_-f_n, respectively.

Antenna device having multi-stage decoupling network circuit

A broadband patch antenna comprises a substrate, a ground plate attached to one surface of the substrate, a radiation plate attached to the other surface of the substrate opposite the one surface of the substrate, and a feed line attached to the other surface of the substrate and having one end connected to the radiation plate. The feed line comprises a first line and a second line. The ground plate has the shape of capital 'L' having a first groove, a second groove, and a third groove, and may not comprise a portion corresponding to the radiation plate. The first groove is positioned at a first portion which corresponds to a connection portion between the first line and the radiation plate, the second groove is positioned at a second portion which corresponds to a connection portion between the second line and the radiation plate, and the third groove may be positioned so as to be spaced apart from the first groove and the second groove.

Broadband patch antenna

A center-fed array antenna comprises: a central radiation element located in the center among the odd number of N radiation elements; a first radiation part including n (=(N&#x2212;1)/2) first radiation elements positioned on one side of the central radiation element and n first phase shifters corresponding to each of the n first radiation elements; a second radiation part including n second radiation elements positioned on the other side of the central radiation element and n second phase shifters corresponding to each of the n second radiation elements; and a 3-way power divider distributes the received feed signal in an asymmetric ratio in proportion to the ratio of the number of radiation elements included in the central radiation element and the first and second radiation parts, and outputs the obtained first to third distribution feed signals to the corresponding central radiation element and the first and second radiation parts, respectively.

Center-fed array antenna using unequal power divider

An apparatus for removing a magnetic interference signal according to a use of a full duplex radio (FDR) scheme comprises a plurality of Rat race couplers; and a plurality of antenna pairs in which two antennas are paired, wherein each of the plurality of antenna pairs are disposed at equal intervals from each other, a first output port between two output ports of a first Rat race coupler from among the plurality of Rat race couplers is connected to a first antenna of a first antenna pair and a second output port is connected to a second antenna of the first antenna pair, a third output port between two output ports of a second Rat race coupler from among the plurality of Rat race couplers is connected to a third antenna of a second antenna pair, and a fourth output port is connected to a fourth antenna of the second antenna pair.

Method for removing magnetic interference signal according to use of FDR scheme, and device for removing magnetic interference signal

A method for an apparatus that supports full-duplex radio (FDR) communication controlling a self-interference duplication signal for removing self-interference comprises the steps of: transmitting two reference signals; and measuring the power of the two reference signals that arrive as self-interference signals; and a self-interference duplication generation unit for duplicating and generating a self-interference signal including three elements controlling two elements of the three elements based on the measured power of a first reference signal of the two reference signals, and controlling the remaining element based on the measured power of a second reference signal, wherein the three elements comprise a time delayer, a phase shifter and an attenuator, and the two reference signals are orthogonal to each other.

Method for controlling self-interference duplication signal for removing self-interference in environment supporting full-duplex radio (FDR) communication, and apparatus therefor

The apparatus includes a transmission signal divider for dividing and transmitting a received signal to a transmission antenna and an attenuator, an attenuator for applying a predetermined attenuation factor to the transmitted signal divided to the attenuator, a phase shifter for phase-shifting the signal to which the attenuation factor is applied by a predetermined phase, and a time delayer for time-delaying the phase-shifted signal by a predetermined time.

Apparatus and method for cancelling self-interference signal in RF front end

A user equipment (UE) for cancelling a self-interference (SI) signal is disclosed. The UE includes a rat-race coupler, a plurality of transceiving antennas capable of transmitting and receiving signals, a receive antenna, a transmission (Tx) chain connected to an input port when the rat-race coupler uses one port as the input port, and a reception (Rx) chain connected to the receive antenna and an isolated port when the rat-race coupler uses the one port as the input port.

Growing community of inventors

Seoul, South Korea

Byung-Wook Min