公开(公告)号：US20160277049A1

公开(公告)日：2016-09-22

申请号：US15074881

申请日：2016-03-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Dong Woo KANG ,  Cheon Soo KIM ,  Jang Hong CHOI

IPC: H04B1/04 ,  H04W72/04

CPC classification number: H04B1/0483 ,  H04B1/0053 ,  H04B2001/0491

Abstract: Provided is a transmitter. The transmitter includes a signal combiner configured to amplify a first differential radio frequency (RF) signal modulated to be transmitted through a first frequency band and a second differential RF signal modulated to be transmitted through a second frequency band non-adjacent to the first frequency band and summate the amplified first differential RF signal and the amplified second differential RF signal in a current mode to generate an RF signal and a power amplifier configured to amplify the generated RF signal.

Abstract translation: 提供一个发射机。 发射机包括信号组合器，其被配置为放大被调制为经由第一频带传输的第一差分射频（RF）信号和被调制以通过与第一频带不相邻的第二频带传输的第二差分RF信号 并且在当前模式下将放大的第一差分RF信号和放大的第二差分RF信号相加以产生RF信号，以及配置成放大所产生的RF信号的功率放大器。

公开(公告)号：US20210359654A1

公开(公告)日：2021-11-18

申请号：US17317483

申请日：2021-05-11

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Min PARK ,  Jang Hong CHOI ,  Bon Tae KOO ,  Kisu KIM ,  Kyung Hwan PARK

IPC: H03F3/24 ,  H03F3/217 ,  H03G3/30

Abstract: Provided is a drive amplifier. A drive amplifier may include: a main circuit configured to receive an RF input signal and output a first RF output signal; and a selective bias adjustment circuit comprising a first common gate transistor to which a first common gate bias voltage is applied and a second common gate transistor to which a second common gate bias voltage is applied, and configured to output a second RF output signal using the first common gate transistor and the second common gate transistor.

公开(公告)号：US20210181300A1

公开(公告)日：2021-06-17

申请号：US17101506

申请日：2020-11-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jang Hong CHOI ,  Bon Tae KOO

IPC: G01S7/282 ,  G01S7/03 ,  H03L7/081

Abstract: Disclosed is a radar. The radar comprises a transmitter configured to radiate an output signal to an outside. The transmitter includes the phase shifter including a first oscillator configured to generate a first signal, based on a first external signal and a second oscillator configured to generate a second signal, based on a second external signal having a phase different from that of the first external signal, and wherein the first oscillator further receives the second signal to generate the first signal and the second oscillator further receives the first signal to generate the second signal, and configured to generate an oscillation signal of which phase is shifted based on the first signal and the second signal, and the signal amplifier configured to amplify the phase-shifted oscillation signal to generate the output signal.

公开(公告)号：US20220302909A1

公开(公告)日：2022-09-22

申请号：US17585009

申请日：2022-01-26

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jang Hong CHOI ,  Bon Tae KOO ,  Kyung Hwan PARK ,  Min PARK ,  Seon-Ho HAN

IPC: H03K5/01 ,  H03F3/04 ,  H03D7/00 ,  H04L27/22

Abstract: Disclosed is a phase demodulator, which includes a transmitter that outputs a reference signal to a target, a receiver that receives a target signal generated in response to the reference signal from the target, and a demodulation processor that demodulates the target signal, and the demodulation processor includes a phase controller that outputs a first phase signal based on the reference signal, a phase shifter that delays a phase of the first phase signal to output a first delayed signal, a mixer that outputs a first mixing signal based on the target signal and the first delay signal, and an amplifier that outputs a first feedback signal generated by amplifying the first mixing signal to the phase controller.

公开(公告)号：US20220244371A1

公开(公告)日：2022-08-04

申请号：US17573177

申请日：2022-01-11

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Min PARK ,  Bon Tae KOO ,  Kyung Hwan PARK ,  PIL JAE PARK ,  Jang Hong CHOI

IPC: G01S13/58 ,  G01S13/536 ,  G01S7/35

Abstract: Disclosed is a radar device capable of operating in a dual mode, which includes a transmitter that includes a first signal generator that generates a Doppler radar signal and a second signal generator that generates a Frequency Modulated Continuous Wave (FMCW) radar signal, a receiver that receives a reflected signal reflected from a target and converts the reflected signal to a digital signal, a signal processing circuit that processes the digital signal differently depending on the dual mode to output an output signal, a signal analysis circuit that analyzes the output signal, and a controller that controls operations of the transmitter, the receiver, the signal processing circuit, and the signal analysis circuit, and the dual mode includes a first mode in which the first signal generator is activated and a second mode in which the second signal generator is activated.

公开(公告)号：US20170257176A1

公开(公告)日：2017-09-07

申请号：US15229950

申请日：2016-08-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Ik Soo EO ,  Sang-Kyun Kim ,  Cheon Soo KIM ,  Jang Hong CHOI

IPC: H04B17/14 ,  H04L1/24

CPC classification number: H04B17/14 ,  H04B17/0085 ,  H04B17/104

Abstract: A method and device for calibrating a DC offset and an I-Q imbalance component of an RF transceiver, the method including inputting a test signal into a transmitter, and converting the test signal into an analogue test signal; converting the analogue test signal using a transmitting mixer; sub-sampling a signal output from the transmitting mixer; and computing a DC offset calibrating constant number and an I-Q imbalance calibrating constant number from a sub-sampled signal.