Fabry-Perot cavity antenna (FPCA) is known for its high gain characteristics and works based on the multi-reflection principle between a superstrate and a ground plane mutually separated by half-wavelength distance. These antennas are designed by using the well-known Fabry-Perot principle of laser optics. Its recent popularity among antenna engineers stems from the fact that
the FPCA can be designed to perform as well as a horn antenna or an array, with a comparable footprint. It has been explored in different forms using various types of primary radiators such as patch, dielectric resonator, aperture, and open-ended waveguide. The superstrates were generally conceived as partially reflective surface (PRS) of varying configurations e.g., a dielectric layer, printed geometries like metal-grid, electromagnetic band-gap structure, metamaterial, or frequency selective surface. The antenna designs were investigated either by using reflection characteristics or leaky-wave properties of the PRS superstrate. Most recently, a nontransparent fully reflective surface (FRS) has also been proposed as a superstrate where synthesis of aperture field has been demonstrated as an effective technique to realize a high gain. This is possible by using some strategic superstrate engineering. It is extremely challenging to achieve high gain while maintaining the wide impedance bandwidth of an FPCA. In most of the earlier studies, little importance was given to the properties of the primary radiator. But, the impedance bandwidth and the radiation pattern of the primary radiator both play important roles in determining the overall antenna performance. The primary radiator should exhibit the following two attributes: (i) wide impedance bandwidth and (ii) boresight pattern maintained over that wide bandwidth. The ray-tracing analysis, commonly used in geometrical optics (GO) was also employed to identify the phase-locking conditions in an FPCA. This knowledge has been combined with the eigenmode analysis of the FPCA cavity leading to the final design.
Dr. Koushik Dutta is an Assistant Professor in the Department of Electronics and Communication Engineering, Netaji Subhash Engineering College, Kolkata, India. Presently, he is a visiting researcher in the department of ECE, University of Central Florida, USA. After finishing his B.Sc Physics Honors, he had received his B.Tech., M.Tech., and PhD degrees from the Institute of Radio
Physics & Electronics, University of Calcutta, India. He has researched in developing high-gain Fabry-Perot cavity antenna with a new concept and theory. He has published over 40 papers in top peer-reviewed Journals and Conferences. Dr Dutta is a Senior Member of IEEE and a life member of the Institute of Engineers (India). He is presently associated with editorial boards of several International Journals. He is the recipient of the National Fellowship from MHRD, India and IEEE outstanding volunteer Award of IEEE Kolkata. He has received 2 best paper awards at IEEE conferences. For the past 10 years, he took the responsibilities of several IEEE organizational units in India. Presently, he is the vice-chair of IEEE AP/MTT Joint Chapter of Kolkata, Student Activity Chair of IEEE Kolkata Section, and Treasurer of IEEE CEDA, India Council. He was the organizing chair of IEEE international conferences TENSYMP STUDENT 2019, ICCE 2020, and AESPC 2021. His current research interests include dielectric resonator antenna, Fabry-Perot cavity antenna, lens antennas, phased array antennas, and antennas for millimetre wave 5G/6G applications.