Kihun Chang

Kihun Chang, Ph. D.

Post-doctoral Research Associate (supervised by Dr. Hao Xin)

Millimeter Wave Circuits and Antennas Laboratory (241A),

Department of Electrical and Computer Engineering (ECE),

The University of Arizona

1230 E. Speedway Blvd., Tucson, AZ 85721, U.S.

Email: chang.kihun@gmail.com

Office: +1-520-621-4296

Education

Ÿ           Ph. D. in Electrical and Electronic Engineering, Aug. 2009
   Microwave and Antenna Lab., Yonsei University, Seoul, Korea
   Doctoral Dissertation: An Electromagnetic Gradient Surface and Its Application to Flat Reflector Antennas
   Advisor: Dr. Young Joong Yoon

Ÿ           M. S. in Electrical and Electronic Engineering, Aug, 2004
   Microwave and Antenna Lab., Yonsei University, Seoul, Korea
   Thesis topic: Multi-resonant ultra-wideband dipole antenna with band-rejection

Ÿ B. S. in Mechanical and Electronic Engineering, Aug. 2002
Yonsei University

Research Interest

Ÿ Periodic Structures and Metamaterial-Based Antenna Technology
- Artificial Magnetic Conductors (AMC), Electromagnetic Bandgap (EBG) Structure
- Electric-coupled Metamaterials, Active Frequency Selective Surfaces (FSS)
- Gradient Index Metamaterials

Ÿ Multi-functional Antennas and Rectifying Antennas

Ÿ Planar and/or Small Antennas

Ÿ Magneto-dielectric Antennas

Publications

Ÿ Refereed Journal Papers

1. K. Chang and Y. J. Yoon, “Electromagnetic Parabolic Cylinder on a Geometrically Flat Structure at Microwave Regime,” IEEE Transactions on Antennas and Propagation, (under review).

2. K. Chang, J. Ahn, and Y. J. Yoon, “Artificial Magnetic Conductor (AMC) Polarizer Backed Circular-Polarized (CP) Antenna,” The Journal of Korean Institute of Electromagnetic Engineering and Science (KIEES), (under review)

3. K. Chang, J. Ahn, and Y. J. Yoon, “Electromagnetic Gradient Surface with Reflected Beam Steering,” IEEE Transactions on Antennas and Propagation, (under review).

4. K. Chang, J. Ahn, and Y. J. Yoon, “Oblique Incidence on Electromagnetic Gradient Surface,” IET Microwaves, Antennas and Propagation, (Accepted).

5. J. U. Ha, K. Chang, and Y. J. Yoon, “An Integrated Packaging Antenna-Diplexer Module for Cellular/SDMB Bands with LTCC Technology,” Microwave and Optical Technology Letter, (to be published in Apr. 2009)

6. K. Chang, S. I. Kwak, and Y. J. Yoon, “Active Frequency Selective Surfaces Using Incorporated PIN Diodes,” IEICE Transactions on Electronics, Vol. E91-C, No.12, pp.1917-1922, Dec. 2008.

7. J. Kim, D. Kim, J. Burm, K. Chang, and Y. J. Yoon, “Phase Control Using Open-Stubs for Programmable SAW-based RFID,” Journal of the Korean Physical Society, Vol. 53, No.2, pp.831-834, Aug. 2008.

8. S. W. Bae, W. Lee, K. Chang, S. Kwon, Y. J. Yoon, “A Small RFID Tag Antenna with Bandwidth-Enhanced Characteristics and a Simple Feeding Structure,” Microwave and Optical Technology Letter, Vol. 50, No.8, pp.2027-2031, Aug. 2008.

9. K. Chang, H. Kim, and Y. J. Yoon, “UWB Antenna with Improved Gain Characteristics,” IET Microwaves Antennas & Propagation, Vol. 2, No.5 pp. 512-517, Aug. 2008.

10. K. Chang and Y. J. Yoon, “Antennas for Ubiquitous Sensor Network,” IEICE Transactions on Communications, Vol. E91-B, No.6, pp. 1697-1704, Jun. 2008.

11. J. U. Ha, K. Chang, and Y. J. Yoon, “Antenna-Diplexer Module for Cellular/SDMB Band Using LTCC Technology,” The Journal of Korean Institute of Electromagnetic Engineering and Science (KIEES), Vol. 18, No. 7, pp. 774-783, Jul. 2007.

12. Y. Lim, K. Chang, and Y. J. Yoon, “A Study on the Intenna Based on PIFA with Multi Element,” The Journal of Korean Institute of Electromagnetic Engineering and Science (KIEES), Vol. 18, No. 7, pp. 784-795, Jul, 2007.

13. K. Chang, W. Lee, Y. J. Yoon, J. Kim, J. Park, and J. Burm, “A Wireless Identification System Using an Efficient Antenna Based on Passive Surface Acoustic Wave(SAW) Devices,” The Journal of Korean Institute of Electromagnetic Engineering and Science (JKIEES), Vol. 7, No.1, pp.12-16, Mar. 2007.

14. K. Chang, Y.-H. Kim, Y.-J. Kim, and Y. J. Yoon, “Functional Antenna Integrated with a Relative Humidity Sensor Using a Synthesized Polyimide for a Passive RFID Sensing,” Electronics Letters, Vol. 43, No.5, pp. 259-260, Mar. 2007.

15. S. I. Kwak, K. Chang, and Y. J. Yoon, “Small Spiral Antenna for Wideband Capsule Endoscope System,” Electronics Letters, Vol.42, No.23, pp.1328-1329, Nov. 2006.

16. Y.-H. Kim, K. Jang, Y. J. Yoon, and Y.-J. Kim, “A Novel Relative Humidity Sensor Based on Microwave Resonators and a Customized Polymeric Film,” Sensors and Actuators B-Chemical, Vol.117, No 2, pp. 315-322, Oct. 2006.

17. W. Lee, K. Chang, Y. J. Yoon, and B. M. Lee, “A Small RFID Tag Antenna with Bandwidth-Enhanced Characteristic,” The Journal of Korean Institute of Electromagnetic Engineering and Science (KIEES), Vol. 17, No. 6, pp. 511-518, Jun. 2006.

18. K. Chang, H. Kim, and Y. J. Yoon, “A Triple-Band Printed Dipole Antenna Using Parasitic Elements for Multiple Wireless Services,” Microwave and Optical Technology Letters, Vol.47, No.3, pp.221-223, Nov. 2005.

19. H. Kim, K. S. Hwang, K. Chang, and Y. J. Yoon, “Novel Slot Antennas for Harmonic Suppression,” IEEE Microwave and Wireless Components Letters, Vol.14, No.6, pp.286-288, Jun. 2004.

20. K. Chang, H. Kim, K.-S. Hwang, I.-J. Yoon, and Y. J. Yoon, “A Triple-Band Printed Dipole Antenna using Parasitic Elements for Multiple Wireless Service,” The Journal of Korean Institute of Electromagnetic Engineering and Science (JKIEES), Vol. 4, No.1, pp. 8-12, Mar. 2004.

21. K.-S. Hwang, H. Kim, K. Chang, J.-U. Ha, and Y. J. Yoon, “Bandwidth Enhancement of a Meander Slot Antenna with Harmonic Suppression,” The Journal of Korean Institute of Electromagnetic Engineering and Science (KIEES), Vol. 14, No. 9, pp.961-966, Sep. 2003.

Ÿ Conference Papers

1. K. Chang, J. Ahn, and Y. J. Yoon, “Physically Flat but Electromagnetic Parabolic Surface Using EBG Structure with Stepped Reflection Phase,” European Conference on Antennas and Propagation, to be presented, Mar. 23-27. 2009.

2. K. Chang, J. Ahn, and Y. J. Yoon, “Artificial Surface with Asymmetric Reflection Properties,” Asia-Pacific Microwave Conference, Dec. 17-20, 2008.

3. K. Chang, S. I. Kwak, and Y. J. Yoon, “Equivalent Circuit Modeling of an Active Frequency Selective Surfaces,” IEEE MTT-S Radio and Wireless Week, pp.663-666, Jan. 22-25, 2008.

4. K. Chang, S. I. Kwak, S. H. Lee, and Y. J. Yoon, “Ultra-Wideband Conical Helix for Capsule Endoscope System,” International Symposium on Antennas and Propagation, pp.880-883, Aug. 20-24, 2007.

5. K. Chang, W. S. Kang, and Y. J. Yoon, “Antennas for Ubiquitous Sensor Network,” International Symposium on Antennas and Propagation, pp.596-599, Aug. 20-24, 2007.

6. K. Chang, W. Lee, J. Kim, J. Park, J. Burm, and Y. J. Yoon, “A Wireless Identification System with an Efficient Antenna Based on Passive SAW Devices,” IEEE Antennas and Propagation Society International Symposium, pp.1765-1768, June 10-15, 2007.

7. K. Chang, Y.-H. Kim, Y.-J. Kim, and Y. J. Yoon, “Patch Antenna Using Synthesized Polyimide for RFID Sensing,” European Microwave Week, pp.126, Sept. 10-15, 2006.

8. K. Chang, H. Kim, and Y. J. Yoon, “Multi-Resonance UWB Antenna with Improved Band Notch Characteristics,” IEEE Antennas and Propagation Society International Symposium, pp.516-519, July 3-8, 2005.

9. (Total 31 international and 19 domestic conference papers)

Ÿ Patents

1. K. Chang, et al., “Antenna Having Extended Operation Frequency Bandwidth,” U.S. Registration Dates: Apr. 21, 2009, U.S. Patent No.: 7522106.

2. K. Chang and Y. J. Yoon, “Reflection Type Polarization Converter and Polarization Generation Apparatus and the Transmitter-Receiver of a Radio Signal,” Korea Filing dates: Feb. 20, 2009, Korea Patent Application No.: 10-2009-0014325.

3. K. Chang, et al., “Wideband Antenna for Covering Both CDMA Frequency Band and UWB Frequency Band,” Korea Filing dates: May 27, 2008, Korea Patent Application No.: 10-2008-0049116.

4. K. Chang and Y. J. Yoon, “Reflection Type Polarization Converter and Polarization Generation Apparatus,” Korea Filing dates: May 7, 2008, Korea Patent Application No.: 10-2008-0042231.

5. K. Chang and Y. J. Yoon, “Transmission Type Polarization Converter and Polarization Generation Apparatus,” Korea Filing dates: May 7, 2008, Korea Patent Application No.: 10-2008-0042230.

6. K. Chang and Y. J. Yoon, “Transmission Type Electromagnetic Refractor,” Korea Filing dates: May 7, 2008, Korea Patent Application No.: 10-2008-0042229.

7. K. Chang and Y. J. Yoon, “Method and Apparatus for Obtaining Car Accident Information Based on Ubiquitous Sensor Network,” Korea Filing dates: Apr. 4, 2008, Korea Patent Application No.: 10-2008-0031652.

8. K. Chang, et al., “Antenna Having Extended Operation Frequency Bandwidth,” Korea Registration dates: Nov 14, 2007, Korea Patent No.: 10-0778120.

9. K. Chang and Y. J. Yoon, “Artificial Magnetic Conductor with Non-Identical Unit Cell and Antennas Comprising It,” Korea Filing dates: Nov. 9, 2007, Korea Patent Application No.: 10-2007-0114083.

10. K. Chang, et al., “Humidity Sensor and Fabricating Method of the Same,” Korea Registration dates: Feb. 13, 2007, Korea Patent No.: 10-0684925.

11. K. Chang, et al., “Printing Antenna of UHF Band,” Korea Registration dates: Feb. 27, 2007, Korea Patent No.: 10-0690849.

12. K. Chang, et al., “Humidity Sensor and Fabricating Method of the Same,” Korea Registration dates: Aug. 24, 2007, Korea Patent No.: 10-0753801.

13. K. Chang, et al., “Small Antenna for Wideband and Capsule Endoscope Using the Same,” Korea Filing dates: Mar. 20, 2006, Korea Patent Application No.: 10-2006-0025398.

14. K. Chang, et al., “Antenna Having Extended Operation Frequency Bandwidth,” Europe Filing dates: Feb. 6, 2007, Europe Patent Application No.: 07101799.0.

15. K. Chang, et al., “Antenna Having Extended Operation Frequency Bandwidth,” Japan Filing dates: May 28, 2007, Japan Patent Application No.: 2007-139945.

Honors and Awards

Ÿ Award of Korea Radio Promotion Association (Nov. 2008)

o 2008 Korean National Picture and Essay Congress on the Beautiful World of Radio

Ÿ The Encouraging Award (Nov. 2008)

o 2008 Idea Contest for Application on Ubiquitous Sensor Network

o “Intelligent Car System for Identifying a Hit-and-Run Car”

Ÿ The Prize of the Minister of Information and Communication (Nov. 2007)

o 2007 Korean National Student Paper Congress on Radio and Broadcasting

o Paper title: “Gradient Artificial Magnetic Conductor (AMC) Surfaces”

Ÿ The 2^nd Award for Excellence in Paper of 2004-2005 KIEES (May 2005)

o Bellwave and Korean Institute of Electromagnetic Engineering and Science (KIEES)

o Paper title: “A Triple-Band Printed Dipole Antenna using Parasitic Elements for Multiple Wireless Service”