Evanescent Mode Waveguide Filtering Antennas
#antenna
#radar
#phased-arrays
Abstract:
Antenna/filter technology for RADAR phased arrays has the following requirements: high power handling capability and low loss characteristics for large range of the RADAR, large beamwidths for ultra-low scan loss, wide bandwidth operation for increased probability of detection and range, alternatively, tunable narrowband operation to decrease RADAR's pickup by ELINT/ ESM devices, filtering capability to protect friendly EW/RADAR/SPACE comm devices from being saturated/damaged and to increase probability of detection/ range, should be lightweight to enable space/airborne/man-portable deployment, should be thermally stable to ensure deployment in varied geographies of the country. His group at IIT Delhi have been involved in evanescent mode waveguide-based filtering antennas. To put it succinctly, small aperture/cross-section waveguides operating below their cut-off frequencies are utilised to produce both wide beam radiation and wide band filtering capability, simultaneously. The components have been implemented by additive manufacturing, offering lightweight solutions (if done in aluminium) or thermally stable and chemically inert structures (if done with stainless steel). Additionally, a circulating filtering antenna has been developed. All the structures have been thermally simulated and show remarkable temperature stability.
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- Dept. of Electrical Engineering, IIT Kanpur
- Kanpur, Uttar Pradesh
- India 208016
- Building: ACES Building
- Room Number: DA229
Speakers
Dr Kirti Dhwaj of CARE, IIT DELHI
Biography:
Dr Kirti Dhwaj received his PhD in 2018 at the University of California, Los Angeles, and his B.Tech. from IIIT Allahabad in 2012. He has worked with Broadcom Inc., Silicon Laboratories, Bell Laboratories and Georgia Institute of Technology as a Microwave Filter Engineer. Currently, he is an Assistant Professor at IIT Delhi and leads the Indian Army's ELINT development programme. He also holds the Core Research Grant for developing wide-beam filtering antennas from the Department of Science and Technology. He has been a faculty with Bharat Electronics, teaching microwave filters, and led a course on microwave technology for officers of the Central Reserve Police Force. His research interests are in the fields of microwave filters and filtering antennas. Dr Kirti twice won filter design competitions at the International Microwave Symposium, whereas his students have won the same accolade for filtering antennas at MAPCON.
Email:
Address:INDIAN INSTITUTE OF TECHNOLOGY DELHI, , Delhi, India, 110016