Samsung Electro-mechanics Co., Ltd.

Korea Advanced Institute of Science and Technology

Samsung Electronics Co., Ltd.

Sungkyunkwan University

Phychips Inc.

Yoo Sam Na

Yoo Hwan Kim

Hyun Hwan Yoo

Hyun Jin Yoo

Byeong Hak Jo

Jong Mo Lim

Jong Myeong Kim

Hyeon Seok Hwang

Moon Suk Jeong

Hyung Jun Cho

Gyu Suck Kim

Hyun Paek

Seong Jong Cheon

Dae Seok Jang

Moon Sun Kim

Young Sik Hur

Song Cheol Hong

Ki Yong Son

Bon Hoon Koo

Seung Min Oh

Shin Hwan Hwang

Kyoung Seok Park

Jeong Hoon Kim

Ho Kyung Kang

Young Kyoon Im

Dae Hyun Jang

Won Gi Kim

Hak Gu Kim

Hyo Seok Kwon

Young Bal Kim

Soo Ki Choi

Kang Yoon Lee

Sol Kim

Jae Hyouck Choi

Hong Jin Kim

Jang Ho Park

Gyu Sub Kim

Nam Heung Kim

Hak Sun Kim

Young Gun Pu

Sang Hyun Cho

Hyung Gu Park

Se Jong Kim

Ki Won Choi

Won Jin Baek

Kang Ta Jo

Sang Do Cho

Su Syeong Kim

Ju Yeon Lee

Si Heon Kwak

Ho Taek Song

Min Sun Kim

Jin Ho Ko

Byung Sung Kim

Su Kyong Kim

Dong Su Lee

Gi Won Choi

Su Gyeong Kim

A radio-frequency device includes a radio-frequency module. The radio-frequency module includes a first substrate, a second substrate, a radio-frequency integrated circuit (RFIC), a front-end integrated circuit (FEIC), and a flexible substrate. The RFIC has at least a portion surrounded by a first core member and is configured to input or output a base signal and a first radio-frequency (RF) signal having a frequency higher than a frequency of the base signal. The FEIC has at least a portion surrounded by a second core member and is configured to input or output the first RF signal and a second RF signal having a power different from a power of the first RF signal. The flexible substrate is configured to connect the first and second substrates to each other, provide a transmission path for the first RF signal, and being more flexible than the first and second substrates.

Electronic device with radio-frequency module

Disclosed herein are a transformer and a method of manufacturing the same. The transformer includes: a primary side winding having a loop shape; a secondary side winding formed on the same plane as that of the primary side winding in a remaining section except for at least a section at which it intersects with the primary side winding and having the same loop shape as that of the primary side winding so as to be electromagnetically coupled to the primary side winding; and an intersecting section formed so that the primary side and secondary side windings having the sum of the turn numbers of 3 or more intersect with each other in a two-layer structure, wherein the intersecting section includes at least one point of intermediate node having one side connected in a first layer and the other side connected in a second layer.

Transformer and method of manufacturing the same

A front-end module includes: a substrate including a first connection member in which at least one first insulating layer and at least one first wiring layer are alternately stacked, a second connection member in which at least one second insulating layer and at least one second wiring layer are alternately stacked, and a core member disposed between the first and second connection members; a radio-frequency component mounted on a surface of the substrate and configured to amplify a main band of an input RF signal or filter bands outside the main band; an inductor disposed on a surface of the core member and electrically connected to the radio-frequency component; and a ground plane disposed on another surface of the core member. The core member includes a core insulating layer thicker than an insulating layer among at least one first insulating layer and the at least one second insulating layer.

Front-end module

An apparatus for switching a transmission route of a radio frequency signal is provided. The apparatus may include a first inductor electrically connected to first and second ports; a second inductor electrically connected to the third and fourth ports and disposed to have mutual inductance with the first inductor; first, second, third, and fourth switches configured to switch an electrical connection between the first, second, third, and fourth ports and a ground, respectively; wherein the first and second inductors are electrically connected to the ground through one of the first and second switches and one of the third and fourth switches such that a radio frequency signal pass between one of the first and second ports an one of the third and fourth ports.

Apparatus with transmission route switching of radio frequency signals and radio frequency module

An amplifying device includes: an amplifying circuit connected between an input terminal and an output terminal and amplifying a signal input in an amplification mode; and a bypass circuit including a filter connected to a bypass path for bypassing the amplifying circuit, wherein the bypass path is in an off-state in the amplification mode and is in an on-state in a bypass mode, and the filter bypasses an input high-frequency signal to ground, in the amplification mode.

Amplification device with isolation characteristics

A radio-frequency switch includes a first series switch including a plurality of series field-effect transistors (FETs) connected in series between a first terminal and a second terminal, a first shunt switch including a plurality of shunt FETs connected in series between the first terminal and a first ground terminal, and a first shunt gate resistor circuit including a plurality of gate resistors respectively connected to gates of the plurality of shunt FETs of the first shunt switch. Respective resistance values of the plurality of gate resistors of the first shunt gate resistor circuit successively increase in a direction away from the first ground terminal toward the first terminal.

Radio-frequency switch with voltage equalization

An amplifying apparatus includes a variable gain amplifying circuit configured to operate in a gain mode selected from a plurality of gain modes in response to a first control signal during operation in an amplification mode, a variable attenuation circuit configured to have an attenuation value that is adjusted in response to a second control signal, and a phase compensation value which compensates for a phase distortion in the selected gain mode, and a control circuit configured to control the selecting of the gain mode, the adjusting of the attenuation value and the phase compensation value, based on the first and second control signals.

Variable gain low noise amplifying apparatus with phase distortion compensation

An inductor includes a substrate, and a first coil pattern disposed on one surface of the substrate and having a spiral shape comprising a plurality of turns, wherein as the first coil pattern extends inwardly towards a center of the first coil pattern, a pattern width of the first coil pattern decreases while a center-to-center distance between two adjacent turns of the first coil pattern increases.

Inductor and low-noise amplifier including the same

A directional coupler circuit includes a signal line disposed between a first terminal and a second terminal; a coupling line comprising a first end terminal and a second end terminal, and disposed to be coupled to the signal line; a switching circuit connecting the first end terminal and a coupling port to each other to extract a first coupling signal in a first coupling mode, and connecting the second end terminal and the coupling port to extract a second coupling signal in a second coupling mode; and a phase compensating circuit configured to compensate for a phase difference between the coupling port and a first isolation port in the first coupling mode, or compensate for a phase difference between the coupling port and a second isolation port in the second coupling mode.

Directional coupler circuit and power amplifying device with phase compensation function

An apparatus includes an amplifying circuit configured to include stacked first and second transistors, and to amplify a signal input from an input terminal during an operation in an amplifying mode, and provide the amplified signal to an output terminal, and a negative feedback circuit comprising first to nth sub-negative feedback circuits, each corresponding to a separate gain mode included in the amplifying mode, wherein the negative feedback circuit is configured to provide a variable resistance value to determine a negative feedback gain based on each of the separate gain modes.

Variable gain low noise amplifier with phase compensation

A coupler circuit includes: a signal line disposed between a first terminal and a second terminal; a coupling line disposed between a coupling port and an isolation port such that the coupling line is coupled to the signal line and is configured to extract a coupling signal from the signal line; and a coupling adjusting circuit connected to the coupling port and the isolation port, and configured to reduce changes in an amount of coupling according to a change in a frequency band of a signal passing through the signal line.

Coupler circuit with phase compensation function

A low noise amplifier circuit includes a first low noise amplifier including a common gate structure cascoded with a parallel common source structure to selectively amplify a band signal among first and second band signals; a second low noise amplifier including a common gate structure cascoded with a parallel common source structure to selectively amplify a band signal among third and fourth band signals; an output DPDT circuit including a first input terminal connected to the first low noise amplifier, a second input terminal connected to the second low noise amplifier, and a first output terminal and a second output terminal for selectively outputting signals input through the first input terminal and the second input terminal; and a control circuit performing an amplification control and a switching control for the first and second low noise amplifiers and the output DPDT circuit in response to a predetermined communications scheme.

Low noise amplifier circuit with multiple-input multiple-output (MIMO) structure

A radio frequency switch circuit is described including a radio frequency switch and a coupler. The radio frequency switch includes a first band switch circuit connected between a first signal port and a common port, and configured to switch a first band signal. The coupler includes a first coupling wiring, disposed adjacent to a signal wiring formed between the common port of the radio frequency switch and an antenna port, and configured to form a first coupling signal with the signal wiring. A resonant frequency of the first coupling wiring is based on an inductance of the first coupling wiring and a capacitance of the radio frequency switch.

Radio frequency switch circuit and apparatus having built-in coupler

A radio frequency switching device includes a switching circuit including first and second transistors; a gate resistor circuit including a first gate resistor and a second gate resistor, the first gate resistor connected to a gate of the first transistor and the second gate resistor connected to a gate of the second transistor; a gate buffer circuit including a first gate buffer and a second gate buffer, the first gate buffer being connected to the first gate resistor to provide a first gate signal to the first transistor through the first gate resistor, the second gate buffer being connected to the second gate resistor to provide a second gate signal to the second transistor through the second gate resistor; and a delay circuit to generate the first gate signal having a first switching time and the second gate signal having a second switching time different than the first switching time.

Radio frequency switching device for fast switching operation

Growing community of inventors

Seoul, South Korea

Yoo Sam Na