Title:
A Class of Printed Leaky Wave Antennas
Date:
Thursday, November 7, 2013 at 2:00 p.m.
Location:
EITC E1-270 (Fort Garry Campus; Engineering Building)
Speaker:
Prof. Yahia Antar
IEEE Distinguished Lecturer—Antennas and Propagation Society
Canada Research Chair in Electromagnetic Engineering
Department of Electrical and Computer Engineering
Royal Military College of Canada
Abstract:
Microwave and millimeter wave antennas are vital components for wireless and satellite communications, radars and other sensors, and many other emerging applications. The presentation will start by introducing some research activities at the Royal Military College of Canada that address recent and emerging research directions in the field. This will be followed by describing a new class of one and two dimensional printed leaky wave antennas. Leaky wave antennas form one type of traveling wave antennas in which an aperture is illuminated by the fields of a traveling wave. Usually a leaky wave stems from a close guiding structure that supports traveling waves but has some means of continuous power leakage into the exterior region. The illuminated aperture extends over several wavelengths and is limited by wave attenuation caused by power leakage. The basic properties of leaky wave antennas were founded in the pioneering work of Tamir and Oliner back in the early 1960s and later in the work of Jackson and Oliner. Recently, the need for high gain printed antennas has revived interest in leaky waves resulting in a great number of papers on printed leaky wave antennas. In here we discuss leaky waves analytical properties and their supporting structures. A new coplanar surface wave-based launcher feed system for direct excitation of leaky waves is described. Various high gain planar antenna configurations with partially reflecting screens will be studied in detail as examples of new scanning leaky wave antenna structures. Analysis of some of these structures reveals the main properties of leaky wave antennas and provides some physical insight into their nature and future potential developments. In addition, and based on the unique properties of the newly developed surface wave launchers, a new way of designing associated microwave guiding structures for integration with antennas or for use on their own in microwave circuits is presented.
Speaker Bio:
Dr. Yahia Antar obtained degrees from the University of Alexandria (BSC) and the University of Manitoba (MSc., PhD). He worked at CRC and NRC in Ottawa before joining the staff of the Department of Electrical and Computer Engineering at the Royal Military College of Canada in Kingston where he has held the position of professor since 1990. Dr. Antar is a Fellow of the IEEE (Institute of Electrical and Electronic Engineers) and a Fellow of the Engineering Institute of Canada (FEIC). He serves as an Associate Editor (Features) of the IEEE Antennas and Propagation Magazine and served as Associate Editor of the IEEE Transactions on Antennas and Propagation, IEEE AWPL. He served on NSERC grants selection and strategic grants committees, Ontario Early Research Awards (ERA) panels, and on review panels for the National Science Foundation. In May 2002, Dr. Antar was awarded a Tier 1 Canada Research Chair in Electromagnetic Engineering which was renewed in 2009. In 2003 he was awarded the Royal Military College of Canada “Excellence in Research” Prize and in 2012 the Class of 1965 Teaching Excellence Award. He served on the URSI Board as Vice President, and on the IEEE Antennas and Propagation Society Administration Committee. On 31 January 2011, Dr. Antar was appointed Member of the Canadian Defence Science Advisory Board (DSAB). In October 2012 he received from the Governor General of Canada, the Queen’s Diamond Jubilee Medal in recognition for his contribution to Canada.
Cost:
This will be a free event.
Contact:
For questions or more information: Puyan Mojabi 474 6754.
