Organization: Ajou University and Ajou hospital
Subject: Small antenna for EM waves detection in hospital
Description: Design small antenna at 2.4 GHz frequency for detecting the EM waves in Ajou hospital. The final antenna satisfied requirements of compact, low return loss, omni-directional patterns and moderate directivity.
Organization: Ajou University and Hongik University
Subject: Small and multiband antenna for mobile phones
Description: Design compact and multiband antenna applied in handset/mobiphone terminal. The antenna satisfied the compactness, omni- and good radiation patterns. The technique of Electromagnetic coupling for multiple frequency band purpose was applied and improved. The antenna covered 7 bands which almost covered all the wireless communication bands.
Organization: Ajou University and Seoul National University
Subject: THz integrated module development
Description: Antennas designed at Terahertz frequency was designed, developed, and tested. The antennas were with requirements of high efficiency for increased output power. The antenna could be applied in several applications such as imaging, security, and bio-sensor.
Organization: Ajou University
Subject: Nano photonics device and application
Description: Study the effect of nano-structure on the antenna characteristics. The antenna with the nano particle is a great combination to significantly enhance the power level. This topic is quite new and has a lot of challenge.
Organization: Ajou University
Subject: BK21 PLUS (Brain Korea) postdoctoral fellowship
Description: Research on Terahertz Photomixer and Terahertz Photoconductive antenna for compact and high power sources.
Organization: NAtional FOundation for Science and TEchnology Development (NAFOSTED-103.05-2013.75)
Subject: Emission Efficiency of Photoconductive Antennas in a Terahertz Pulsed System
Description: Design of substrate lens, laser pulse, and plasmonic nano-antenna structure to improve THz output power of Photoconductive antenna in THz-Time Domain Spectroscopy.
Organization: FOundation for Science and TEchnology Development-Ton Duc Thang University (FOSTECT.2015.BR.13)
Subject: Advanced metamaterials for enhanced THz generation in photomixers
Description: We explore metamaterial concepts to address some limitations of THz output power using photomixer. The metamaterial-based device architectures are expected to significantly improve thermal qualities as the heat-sink substrate creates a ground plane, modifying the optical absorption and radiation profiles under low input pump powers.
Organization: Asian Office of Aerospace Research and Development- AOARD) (FA2386-15-1-4080)
Subject: A Study of Novel Passive Micromixers with High Mixing Performance and Easy Fabrication
Description: In this project, we propose a novel passive micromixer structure based on the effect of stretching-folding in both vertical and horizontal directions for High Mixing Performance and Easy Fabrication.
Organization: TWAS (The World Academy of Science-16-184 RG_PHYS_AS_I)
Subject: Ultra-thin metamaterial for enhanced THz generation in photoconductive antenna based photomixer
Description: In this work, we propose utilizing plasmonic gratings embedded within the photoconductive region of an antenna to substantially increase the absorption from the pump lasers. With an optimal grating design, i.e., also known as nano-antenna design, the strong scattering of the impinging pump lasers towards the active layer results in standing resonant fields where optical absorption is enhanced.
Organization: NAtional FOundation for Science and TEchnology Development (NAFOSTED-103.05-2016.37)
Subject: Wideband and High-gain Circularly Polarized Fabry-Perot Antenna
Description: In this project, we have proposed two techniques to obtain a low-profile, light-weight, wideband, and high gain CP antenna. The first one is designing wideband CP radiator by using parasitic elements in conjunction with the conventional crossed dipole antenna. The second one is using Fabry-Perot Resonator (FPR), which consisted of a primary radiator placing inside a cavity formed by a ground plane and two close proximity thin dielectric slabs as partially reflecting surface (PRS), to enhance the broadside gain and 3-dB gain bandwidth. These two techniques are combined and the full antenna is carefully optimized to maximize the overlapping between the impedance bandwidth, the axial ratio (AR) bandwidth, and the 3-dB gain bandwidth while still maintaining high gain and low profile properties.
Organization: ASEAN-India Science & Technology Development Fund (AISTDF) (IMRC/AISTDF/R&D/P-13/2018 )
Subject: Fiber-optic sensor technology for the detection of chemical species in liquid/gas environment using side-polished photonic crystal fiber
Description: The project aims to achieve several objectives. The main objective of the proposed project is to develop a new sensor for the direct detection of chemical species in both liquid and gas environment. Such sensor could open new research boundaries for chemical analysis and simplify the development of fibre-optic chemical sensor.
Organization: FOundation for Science and TEchnology Development-Ton Duc Thang University (FOSTECT.2019B.24)
Subject: Planar Antenna for Circular Polarization
Description: Circular polarization (CP) has become necessary and important due to its immunity to Faraday rotation as well as resistance to polarization mismatch between transceivers, which is a great setback in linear polarization. The goal of this research is to introduce circular polarization onto a planar antenna which is otherwise linearly polarized. The proposed technique introduced in this research will produce a new, simple, and compact planar monopole antenna with wideband circular polarization characteristics. In the last couple of years, introducing CP into planar antennas has received enormous attention. This project aims to contribute to this important research area as well as improves novel ways to achieve results.
Organization: NAtional FOundation for Science and TEchnology Development (NAFOSTED-102.04-2019.04)
Subject: Reconfigurable Antenna with Metamaterial Structures for ISM Band Applications
Description: We rely on theory, simulation (using software ADS, HFSS, CST), and experimentally (manufacturing, measuring) to solve these problems: i) design single/multi-frequency RA and single/multi-resonance MTM structures; ii) find the principle of controlling these resonant frequencies and incorporate them effectively. As a result, RAs incorporating single/multi-band MTM (focusing on ISM*, 700 MHz-4 GHz band) achieves outstanding functions and performance compared to previous designs.
Organization: NAtional FOundation for Science and TEchnology Development (NAFOSTED-102.04-2023.36)
Subject: Design of Reconfigurable MIMO and Array Antenna with Substrate-Integrated-Waveguide (SIW) and Machine Learning (ML) Techniques for 5G Applications
Description: In this study, we aim to use theory, electromagnetic simulation supported by ML and experimental verification to design two advanced RA structures: i) MIMO RA-frequency with SIW and ML operating at frequencies below 6 GHz; ii) Array RA-radiation pattern with SIW and ML operating in mm-Wave (24-28 GHz).