ATL | Antenna Technology Laboratory

vortex-radio-waves

ATL’s principal areas of research are in the design and analysis of antennas and antenna arrays for adaptive beamforming applications, such as direction of arrival estimation, interference mitigation, and radar.

  • Design of small antennas and antenna arrays
  • Phased and time-modulated array antennas
  • Optimization of antennas and array configurations
  • Beamforming hardware implementation
  • Orbital angular momentum (OAM) waves

ATL is hiring highly-motivated students for advanced MILITARY antenna technologies

Our expertise is in the field of advanced military antenna technologies that are employed in satellites, missiles, reconnaissance aircraft, and various unmanned military vehicles.

Not a fan of military stuff? We also deal with civil wireless communications technologies, such as 5G communications, wireless power transfer, and OAM communications.

Check out the open positions below and feel free to come see us!

News & Events

  • Prof. Byun has been invited to ICT Express Journal as an editor

    ICT Express Journal is hosted by Elsevier and available online at sciencedirect.com. In addition, ICT Express is now indexed in SCOPUS, Emerging Sources Citation Index (ESCI), and the Directory of Open Access Journals (DOAJ). Prof. Byun now serves as an editor in the field of ICT Convergence Technologies, especially for Antenna systems, Antennas, Beamforming, RF front-end circuitries and modules, Smart antennas.
  • Our new paper has been published in JEES (KCI, eSCI, SCOPUS Indexed)

    Prof. Byun is a corresponding author of the article, and detailed information is as follows:   Jun Hur, Gangil Byun*, and Hosung Choo, “Design of Small CRPA Arrays with Circular Microstrip Loops for Electromagnetically Coupled Feed,” J Electromagn Eng Sci., vol. 18, no. 2, pp. 129-135, Apr. 2018. DOI: https://doi.org/10.26866/jees.2018.18.2.129
  • Welcome our new member, Jihyeon Mun (문지현)

    Jihyeon Mun is an undergraduate student in the School of Electrical and Computer Engineering (ECE), UNIST. He is currently doing his internship with us. We look forward to meeting other new members for greater success!
  • Prof. Byun in Antenna Technology Workshop 2018

    Prof. Byun was invited as a keynote speaker to give a lecture in Antenna Technology Workshop 2018. The workshop was organized by KIEES (한국전자파학회) and IEEE APS Seoul Chapter, and the venue was The K-Hotel, Seoul. His talk was mainly about time-modulated array (TMA) antenna technologies and provided theoretical explanations with some practical applications. His talk will also be available online shortly.
  • Welcome our new member, Jongwon Yoon (윤종원)

    Jongwon Yoon is an undergraduate student in the School of Electrical and Computer Engineering (ECE), UNIST. He is currently doing his internship with us. We look forward to meeting other new members for greater success!
  • Our new proposal has been accepted (NRF, Start: 2018.03)

    차세대 무선통신을 위한 방향탐지/항간섭/무선전력전송용 통합 다기능 시간변조 배열안테나 연구 Title: Research on Time-Modulated Array Antennas for Next-Generation Wireless Communications with Multi-Functional Operations of Direction Finding, Interference Mitigation, and Wireless Power Transfer Category: Basic Research Program Funder: National Research Foundation of Korea (NRF)

Open Positions

We are looking for highly-motivated graduate students. Please feel free to contact us.

전문연구요원 (병역특례)

박사학위로 병역특례를 마칠 수 있는 전문연구요원 TO가 있습니다. 선착순(2명)으로 할당되오니 관심있는 분은 언제든지 상담 요청하세요.

Post Doc. Researcher (URS)

A. Minimum Requirements

  • Ph.D. Degree
  • At least 1 SCI(E) Journal paper (within the past 3 years)

B. Salary

  • Basic: 2,800,000 KRW (before tax)
  • Extra: TBD (Ex>more than 500,000 KRW/project (before tax))
  • 1100 KRW = 1 US Dollar

C. Benefit

  • An opportunity to live in on-campus dormitory
  • An opportunity to attend domestic/international conferences at least once per year

M.S./Ph.D. Students (Combined Course as well)

A. Minimum Requirements

  • B.S./M.S. Degree with strong background/interests on one/many of i), ii), iii), and iv) will be preferred
    • i) Antennas, electromagnetic waves, and wave propagation
    • ii) RF circuit design and RF hardware implementation
    • iii) Software skills: MATLAB, LABVIEW, C++, Fortran, etc.
    • iv) Passion and Enthusiasm that cover all

B. Salary

  • M.S.: 700,000 KRW + a (before tax)
  • Ph.D.: 1,200,000 KRW + a (before tax)
  • Incentive: TBD (Ex>more than 300,000 KRW/project (before tax))
  • 1100 KRW = 1 US Dollar

C. Benefit

  • An opportunity to live in on-campus dormitory
  • An opportunity to attend domestic/international conferences at least once per year

Contact Information

  • Name: Prof. Gangil Byun
    Email: byun@unist.ac.kr
    Phone: +82-52-217-2107

 

FYI, all lectures in both undergraduate and graduate schools are in English!! (obligation of the school)

 

Detail information about how to prepare your application can be found at http://adm-g.intl.unist.ac.kr/admissions/guidelines/

Research Details

  • Design of small antennas and antenna arrays

    Design of small antennas and antenna arrays

    The use of arrays with multiple antennas has become essential for adaptive...

    The use of arrays with multiple antennas has become essential for adaptive beamforming in advanced wireless communication systems. Typically, arrays are used to adjust the direction of beams and nulls by multiplying complex weights to antenna ports for more reliable communication links in a multipath environment. This beamforming capability can be extended to estimate the direction of signals and mitigate the effects of interference; however, a growing demand for more effective beamforming capability in handheld devices with limited space has led to several technical challenges from an antenna engineering standpoint. First, active element patterns are distorted by strong mutual coupling between the array elements. Second, these distorted radiation characteristics result in lower estimation accuracy, increased ambiguity, and poor resolution in adaptive beamforming operations. Although various miniaturization techniques have been applied to the radiating elements in an effort to employ more antennas in a limited space, the antennas experience an additional gain reduction with an undesired frequency shift due to the narrow matching bandwidth, which cannot exceed the fundamental bandwidth limit. Thus, there has been a growing demand for altering the traditional approach of multiple-antenna arrays to solve these technical challenges, which allows for improving the beamforming performance with a miniaturized aperture size.

  • Phased and time-modulated array antennas

    Phased and time-modulated array antennas

    Traditionally, various beamforming systems based on phased arrays are...

    Traditionally, various beamforming systems based on phased arrays are widely adopted in military and civil applications, however, in searching for less complex alternatives, active research has been stimulated for time-modulated array antennas. Charactersitscs of the TMA antennas are listed below:

    • Phase shifters are replaced to RF switches that can be used to steered the array patterns.
    • The use of RF switches results in different weights with respect to the period and the duty.
    • Advantages of using the TMA are in lighter weights, lower costs, and lower complexity, which may carry greater potentials for more advanced future wireless communications technologies.
  • Optimization of antennas and array configurations

    Optimization of antennas and array configurations

    Optimization techniques are extremely important in the designing process of...

    Optimization techniques are extremely important in the designing process of antennas and antenna arrays to improve the overall system performances by taking into account antenna characteristics, mutual coupling effects, platform effects, etc. We mainly focus on the genetic algorithm, a.k.a. GA, and are also working very hard to develop a more efficient optimization process based on the machine learning process.

  • Beamforming hardware implementation

    Beamforming hardware implementation

    Implementation of beamforming hardware is essential for antenna engineers...

    Implementation of beamforming hardware is essential for antenna engineers to verify the feasibility of the developed antennas and antenna arrays through field tests.

  • Orbital angular momentum (OAM) waves

    Orbital angular momentum (OAM) waves

    Orbital angular momentum (OAM) waves have recently been spotlighted as a...

    Orbital angular momentum (OAM) waves have recently been spotlighted as a breakthtough technology for maximizing the channel capacity (theoretically, to infinity). We think that this is one of the perfect applications for antenna array engineers. Let’s become a pioneer to this field of research!