RESEARCH FIELDS

1. Microwave Circuit and Systems

We are interested in RF transceivers for future communications such as 5G, 6G and etc.

High Speed Communication System
MIMO System(Dual Polarization, OAM etc.)
Broadband System

120GHz Transmitter/Receiver System

120GHz Receiver

(2021 JSSC)

Demonstration for

20Gbps Data-rate

120GHz LNA Chip Micrograph

(2020 TCAS1)

60GHz Beamformer (2019 TMTT)

120GHz VGA (2020 JIMTW)

120GHz QILO(2020 MWCL)

120GHz VGA(2021 TMTT)

Transmitter and Receiver for STNO Based Wireless Communication (2019 TMAG)

120GHz Power Amp.(2019 TCAS2)

rESEARCH HIGHLIGHT : 20 Gbps+ short range high speed communication SYSTEM demo

20 Gbps data was successfully demonstrated using QPSK / 16QAM Modulation. (~10^-6 BER)
120GHz sub-THz Carrier Freq.
5cm Short Distance
Off-chip Vivaldi Antenna
40nm CMOS Process
JSSC 2021, IOTJ 2023

2. Antennas and Systems

We are interested in Antennas and systems for future wireless communications.

mmW Beamforming Antenna Array
mmW Dual-Polarized Antennas
OAM Antennas
Antenna in Package

Dual Polarized Antenna in Package

60GHz Antenna in Package (2022 TAP)

Horn Antenna Array in Package, Front View (TAP 2022)

Horn Antenna Array in Package, Back View (TAP 2022)

Dual Polarized Antenna (TAP 2021)

rESEARCH HIGHLIGHT : 120-ghZ POLARIZATION control demo

Measurement Setup

Normalized Conv. Gain for Dynamic Pol.

Pol. Ctrl is successfully demonstrated for 120GHz Tx.
20Gbps was demonstrated for arbitrary polarization.
High Isolated Dual Pol. Antenna
40nm CMOS, 3cm Distance.
TAP 2024

Communication Experiment

20Gbps Eye Diagram

QPSK(left), 16 QAM(right)

20Gbps Eye Diagram

QPSK(left), 16 QAM(right)

3. Cyrogenic RF Circuits for Quantum Computing

We are interested in Cyrogenic circuits (Quantum controller/receiver) for quantum computing applications.

Cyrogenics

Quantum Computing

Cyrogenic circuits

Quantum Memories (2022 TQE)

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