Prof. Amit Mehta
Institute of Advanced Telecommunications
Swansea University, UK

This talk covers various types of single element beam scanning antennas under electronic switch control. Firstly, a rectangular spiral antenna with shorting and open switches is presented. Following that, its polarization randomness and other antenna parameter limitations are addressed. Then new structures, namely: star strip, star patch, square loop and double square loop antennas are introduced to overcome the polarization problem in the spiral antenna. All these new antennas are symmetrical, and have multiple feeding points. When excited individually, these feeding points generate a doughnut, four /eight tilted beams of the same characteristics in different quadrants, yielding a complete beam scanning antenna. Finally future work on implementing switches including MEMS on the ground plane of the antennas for switching the beam of the antennas is outlined.

Dr. Amit Mehta received his Bachelor of Engineering degree in Electronics and Telecommunication (University of Pune, India) in 1998, Master of Science Degree in Telecommunications and Information Networks in 2002 (University of Essex, UK) and Ph.D. on Spiral Antennas with beam adaptive radiation pattern in 2005 (University of Essex, UK). From 1998 to 2001 he worked in Telecom Industry in Bangalore and Singapore. From July 2002 to February 2006 he worked as Senior Research Officer at University of Essex. Since, February 2006 he is working at the Institute of Advanced Telecommunications at Swansea University, where currently appointed at a lecturer and has research focus on RF systems, Antennas and UWB. On steerable antenna he has numerous publications, patents; works closely with academic and industrial partners (Hosei University, Japan, Indian Institute of Technology (IIT) Delhi, India and NXP Semiconductors, UK).