Engineer Signal Processing

Kenny Seungwoo Ryu

E-mail : *****.*.***@*****.***

Mobile) 662-***-****

OBJECTIVE

To obtain Antenna Design Engineer position

EDUCATION

Ph. D in Electrical Engineering at University of Mississippi (GPA :3.78)

M.S in Electrical Engineering at Mississippi State University (GPA:3.72)

B.S in Radio & Communication Engineering at Yonsei University (Seoul, Korea)

Dissertation: Ultra-Wideband Dielectric Resonator Antennas for Communication and Radar

Sensor for Breast Cancer Detection compared with Printed Antennas

Thesis: Recognition of Vehicle number plate using Neural Network System

SPECIAL ANTENNA TECHNIQUES AND ACHIEVEMENTS

1. High isolation technique for dual polarization or MIMO antenna application.

A. Achieved high isolation with wideband antenna application

2. High Quality of the radiation pattern performance technique.

A. Solved tilted and deformed broadside E plane pattern problem at the upper band when dielectric

resonator antenna has wide impedance matching bandwidth.(historical achievement)

B. Achieved consistent excellent omni-directional pattern with the low cross polarization level within

whole operating Ultra-wide bandwidth for UWB antenna application.(historical achievement)

3. Increasing impedance matching bandwidth technique and multi-band technique

A. Historical bandwidth enhancement for dielectric resonator antenna area

B. Triple band application using PIFA antenna

C. Introduce controllability of the width of band-notch and dual band-notch design.

4. Enhancement of radiated pulse shape technique

A. Achieved only 0.6 nsec group delay and almost linear phase response.

5. Size reduction technique

A. Around 50 % size reduction (possible smallest portable antenna for UWB application)

6. Signal processing technique related with Electromagnetic research

A. Introduced new adaptive tuning Amplitude and Estimation method for the estimation

B. Microwave image processing

C. Several beamforming technique (DAS, Capon, RCB, and APES method)

RESEARCH EXPERIENCE

1. On-going novel performance antennas

(1) Design dual-polarization UWB antenna to increase channel capacity

(2) Design multiband (GSM, CDMA, UMTS, GPS, and Bluetooth) mobile antenna to reduce cross-

polarization level and to increase isolation level.

2. Antenna design experiences

(1) Dual polarization antenna using hook probe

(2) UWB antenna to avoid interference problem

(3) Dielectric Resonator Antenna (DRA) for the breast cancer detection

(4) UWB DRA to obtain high quality of radiation performance

3. Other antenna design experiences ( Conference or Project )

(1) Circular polarization antenna using modified hybrid feed network

(2) Triple-band Antenna using PIFA structure for WLAN bands (2.4, 5.2, 5.8 GHz)

(3) 1 by 4 and 4 by 4 array antennas for WMAX band

(4) Reconfigurable antenna using switch

4. Signal processing related Electromagnetic area

(1) Non-parametric adaptive beam-forming method specialized in Capon method, Robust Capon

Beamforming (RCB) method, Amplitude and Phase Estimation (APES) method, Adaptive Tuning

Amplitude and Phase Estimation (ATAPES) method.

(2) High accuracy and resolution spectral estimation

5. Active and Passive R.F circuit designs (Team project in research course)

(1) Wilkinson power divider, hybrid, rat race and directional coupler

(2) Low pass and band pass filter, Low noise amplifier (LNA)

6. FDTD & MoM Technique (Course project)

(1) Analysis of the configuration of shielded coupled micro-strip lines using non-uniform grid Finite

Difference technique

(2) Analysis of the micro-strip patch antenna under the Mur, Liao, PML, CPML boundary

condition using Finite Difference Time domain technique.

(3) Solution of the problems of scattering from a perfectly thin wire and yagi Antenna using the

Method of Moment technique.

WORK EXPERIENCE

1. L.G. Research and Development Campus

(1) Assigned to the IMT-2000 team that researched next-generation mobile phone services and

supported technical management issues

(2) Performed field engineer assignments such as plotting field signal strengths and calibrating

antennas.

TEACHING EXPERIENCE

1. Electric Circuit Theory (360/362) in Help session time

TECHNICAL SKILLS

1. E.M Simulators : HFSS, IE3D, CST microwave studio, WIPL-D, and ADS

2. Antenna Fabrication : LPKF PROTOMAT 91S (PCB/Milling machine)

3. R.F. Measurement : Anechoic chamber antenna and HP Network Analyzer usage

4. Other Packages : MathCAD, Circuit CAM, AutoCAD, and PSpice

5. Program Languages : MATLAB, FORTRAN, and Turbo C

RECENT AWARDS WITHIN 3 YEARS

1. Student paper award from 2008 URSI conference

2. Student Paper award from 2009 URSI conference

3. Spring 2010 Dissertation fellowship award from the graduate school (Univ. of Mississippi)

RECENT JOURNAL PAPERS WITHIN 3 YEARS

K. S. Ryu and Ahmed A. Kishk, “Excellent Omni-directional UWB DRA with Low Cross-

polarization Level”, IEEE Trans. Antennas Propagat. (processing)

K. S. Ryu and Ahmed A. Kishk, “Ultra-Wide Band Dielectric Resonator Antenna with

Broadside Patterns Mounted on a Vertical Ground Plane Edge ”, IEEE Trans. Antennas and

Propagation. (Accepted, will be printed 04/2010)

K. S. Ryu and Ahmed A. Kishk, “UWB Antenna with Single or Dual Band-Notches for Lower

WLAN Band and Upper WLAN Band ”, IEEE Trans. Antennas and Propagation., vol 57, pp. 3942-

3950, Dec. 2009

K. S. Ryu, Moe Sepehrifar and Ahmed A. Kishk, “High Accuracy Peak Location and Amplitude

Spectral Estimation via Tuning APES method”, Digital Signal Processing. Available online 26 June

2009

K. S. Ryu and Ahmed A. Kishk, “Wideband Dual Polarized Patch Excited by Hook Shaped

Probes”, IEEE Trans. Antennas and Propagation., vol 56, pp. 3645-3649, Dec. 2008

cf) Several conference papers available on the request

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