Recent Trends in Electromagnetics and Optics
Organized by the Electronics and Telecommunication Engineering Department | IIEST, Shibpur
DST-SERB sponsored Workshop
Prof. Bratin Ghosh
Topic of Lecture:
FULL-WAVE ANALYSIS & DESIGN OF DIEELECTRIC RESONATOR ANTENNAS
Abstract of Lecture:
The Requirement for Efficient & Low-profile Antennas has fuelled Research Work in the Development of Antenna Structures with Performances considerably enhanced over Traditional Antenna Structures & Methodologies. In this context, the Development of the Dielectric Resonator Antenna (DRA) Technology has taken Significant Strides in overcoming Fundamental Limitations in the Design of Broadband & Efficient Antenna Structures. The Microstrip Patch suffer from reduced Efficiency due. It is well known that Antenna Structures like to the Stratified Nature of the Design, resulting in Surface Wave Loss together with the Presence of a Conducting Patch contributing to Conductor Loss in the Antenna Structure. The DRA is Ideally suited for Low-loss Applications due to the Absence of Conductors or Surface-wave Loss.
Furthermore, the Achievable Bandwidth with the Dielectric Resonator Topology of the Order of 60% or more far exceeds that of Broadband Microstrip Patch Antenna Configurations with Typical Bandwidths of 10-15% using Parasitic Patch loaded Configurations. In addition, a Noticeable Feature of such Bandwidth Enhancement by the DRA is that the Wideband Nature is accompanied by Absolute Stability of Radiation Characteristics across the Large Impedance Bandwidth, making the Radiation Bandwidth Identical to the Impedance Bandwidth.
The above features of the DRA make it an ideal choice for Wideband Low-profile Applications with Controlled Radiation Characteristics. In spite of the Potential of the Dielectric Resonator Technology, Analysis Techniques for the DRA have not received Adequate Attention particularly in the Indian Context. This is particularly also significant as the Analysis leads us to the In-depth Understanding of the Modes of the Antenna Structure & their Contribution to the Dielectric Resonator Coupling Problem.
The Talk deals with Introducing & Investigating Full-wave Techniques for Analysis of the Antenna and the Realization of Wideband DRA Structures.
A Bit About Prof. Ghosh
Prof. Bratin Ghosh received his Bachelors in Electronics and Telecommunication Engineering in 1990 from Jadavpur University, Kolkata, Master of Technology in Electronics and Electrical Communication Engineering with specialization in Microwave Engineering in 1994 from the Indian Institute of Technology, Kharagpur and Ph.D. in Applied Electromagnetics in 2002 from the University of Manitoba, Canada. He is currently a Professor in the Department of Electronics and Electrical Communication Engineering, Indian Institute of Technology, Kharagpur. He is a TPC Member and an Invited / Keynote Speaker & Chaired Sessions in many National & International Conferences & Seminars. He has been the Recipient of many Federal Project Grants in addition to Research Grants from the Industry on the Design of Efficient Antennas & Guided Systems. He has also organized many Short Term Lectures & Workshops in the Field of Applied Electromagnetics that have been well attended by Participants from both the Academia and Industry. He had been the Recipient of the National Talent Search Scholarship, the University of Manitoba Graduate Fellowship and is Senior Member, IEEE. He has also been the Recipient of many National Awards, Travel Grants & Best Student Paper Awards. His Areas of Research Interest are Full-wave Green’s Function Technique for the Analysis of Cylindrical & Spherical Multilayer Structures, Singularity Removal Techniques, Efficient Evaluation of Sommerfeld Integral Tails and Leaky & Creeping Waves in Cylindrical Structures. He is also actively involved in the Design & Analysis of Efficient Horn Antenna Feeds, Metamaterials, Dielectric Resonator Antennas, Antenna Miniaturization and Numerical Techniques.