报告题目：Reconfigurable Antennas for Digital Data Communication Systems

报告人：Dau-Chyrh Chang，IEEE Life Fellow, IET Fellow, and EMA Fellow， Chair Professor, Department of Communication, Oriental Institute of Technology，New Taipei City, Taiwan

时间：2014年11月11日，下午2：00

地点：行政楼一楼108会议室

Abstract：

From the Shannon-Hartley theorem, the channel capacity depends on the received S/N (signal to noise ratio) and the data streams in communication system. The S/N and data streams depend on the performance of antenna. In order to improve the channel capacity in digital data communication, reconfigurable antennas play an important role for the communication system.

According to the electrical performances, the reconfigurable antennas are divided into pattern reconfigurable antenna, polarization reconfigurable antenna, and impedance (or frequency) reconfigurable antenna. All these reconfigurable antennas are adaptive to the environmental condition to reduce the effects of propagation fading. The pattern reconfigurable antenna is an adaptive pattern with the maximum S/N in receiver. The phased array antenna and the adaptive antenna are example of pattern reconfigurable antennas. The change of polarization during wave propagation is another propagation fading. The change of polarization will also reduce the S/N in receiver. The polarization fading can be improved by the polarization reconfigurable antenna.  The polarization reconfigurable antennas includes linear (vertical, horizontal, or slant) polarization and circular (right hand or left hand) polarization which is used to solve this polarization fading problem. Another reconfigurable antenna is changing the impedance of the antenna at the desired frequency. This is impedance or frequency reconfigurable antenna.

Various kinds of developed reconfigurable antennas for digital data communications and the measurement of EVM (error vector magnitude) by using these reconfigurable antennas will be discussed in this talk.

报告人简介：

Dau-Chyrh Chang obtained his BS degree and MS degree from Chung-Cheng Institute of Technology, and Ph.D. degree in Electrical Engineering from University of Southern California. He spent 17 years in antenna R&D at CSIST (Chung Shan Institute of Science and Technology). For 12 of these years, he served as director of antenna section. During his employment at CSIST, he developed reflector antennas, phased array antennas, slot array antennas, communication antennas, and innovative antenna test range. In 1998, he left his post as director of the antenna section to become Dean of the Engineering School at Da-Yeh University. He had been invited to be the Dean of College of Electrical and Communication Engineering at Oriental Institute of Technology in 2006.

He established the IEEE AP-S Taipei Chapter and as the first Chair in 2001, Chair of IEEE MTT-S Taipei Chapter, President of Chinese Microwave Association. He has been the General Chair of CSTRWC2001, CSTRWC2008, ISAP2008, ICONIC2009, AEM2C2010, IEEE iWEM2011, CSQRWC2012, PIERS2013 in Taipei, and future IEEE IMWS-Bio 2015. He has been the Chair Professor and Director of Communication Research Center at Oriental Institute of Technology since 2006.

Prof. Chang is IEEE Life Fellow, IET Fellow, and EMA Fellow.