RESEARCH

 Research Work:

• Substrate Integrated Coaxial Line (SICL) Antennas and Circuits: 

With the advent of modern wireless communication technologies, researches on designing high frequency microwave and millimeterwave circuits are of prime interest now-a-days. Conventionally, waveguide based circuits are preferred for these applications due to its inherent advantages e.g. low loss, high Q, high power handling capability, good electromagnetic shielding etc. However, the bulky nature of waveguide structure, band-limited performance and complex fabrication process limits the use of these systems in compact, low profile wireless applications. Also conventional microstrip based planar technology are limited in performance due to its inherent disadvantages e.g. radiation loss, surface wave loss etc.

Recently, a concept to implement conventional coaxial line in planar substrate has been reported. The modified form of integrated coaxial line is known as substrate integrated coaxial line (SICL) which implements TEM transmission line in planar substrate using standard PCB fabrication technology. The SICL line is attractive since it operates over a large bandwidth with non dispersive propagation while maintaining a compact size. The shielded configuration of SICL line minimizes signal interference and crosstalk which is a major issue in millimeterwave communication system. Thus the new SICL technology opens a new frontier to design efficient millimeterwave circuits for compact low profile wireless applications. The area of research includes a detailed study of substrate integrated coaxial line and its integration with other planar technologies for its possible use in millimeterwave applications in Ku band (12-18 GHz) and Ka band (26-40 GHz).

• Substrate Integrated Waveguide (SIW) Antennas and feed network: 

Over the years, horn antennas are being used extensively for microwave communication based applications such as satellite tracking, RADAR, communication dishes etc. Typical advantage of horn antenna is high gain, wide bandwidth, ease of manufacturing etc. It finds a lot of application in feed antenna for reflector and lenses and in phased array antenna. Also, it is widely used as standard antenna for calibration and measurement purpose. However, the horn antenna is generally realized using nonplanar waveguide based structure which makes it bulky and not easy to integrate with planar circuits. The transition of planar to nonplanar technology includes complex interconnect designs which are not easy to implement and often exhibits narrowband performance. Hence an easier implementation of integrated planar circuits with horn antennas are in great demand to implement novel high-performance microwave circuits.

Recently, a new technology has emerged to implement planar version of dielectric filled waveguide which is named as Substrate Integrated Waveguide (SIW). The SIW technology can be one of the most promising technology to implement horn antenna in commercially available planar dielectric substrate which can be easily integrated with other low profile microwave circuits. In this case, the top and bottom metallic plate of the commercially available substrate will be used as the top and bottom conducting wall of the horn antenna and the sidewall of the horn antenna will be implemented by using plated through hole (PTH) based rows of metallic via. Thus the proposed structure can generate high gain, low VSWR radiation while maintaining planar form. Since the proposed antenna and other planar microwave circuits will be realized in the same substrate, it will be easier to integrate them using simpler interconnects and will exhibit better performance.

• Chipless RFID

• Multiband/broadband Microstrip Antenna.

• Antennas for IoT

    Invited talk:

• Summer FDP on Antenna Trends (01 – 05 July, 2019), E& ICT Academy, IIT Guwahati, "Radiation from planar apertures; waveguide and horn antennas"

• IEEE MTT-S Student Branch Chapter along with IEEE MTT-S UP Chapter Lecture on "Introduction to Substrate Integrated Waveguide (SIW)  based circuits and antennas" [Link].

• Designing of Substrate Integrated Waveguide (SIW) Antennas, IEEE MTT-S and AP-S SBC, Department of ECE, Manipal University Jaipur

• Substrate Integrated Circuits – microwave and millimeterwave applications, IEEE Microwave Theory & Techniques Society (MTT-S) Student Branch Chapter (SBC) IIT BHU Varanasi

• Application of Substrate Integrated Circuits in Microwave and Millimeterwave Frequencies, IIT Palakkad & IEEE APS Kerala

• Microwave or Milimetrewave based RFID sensors for IOT, TEQIP-III Sponsored Workshop on "Emerging Trends in Nanotechnology(ETNT-2020)"

• 5G millimeterwave antennas and circuits using substrate integrated coaxial line (SICL) technology, Webinar series on Recent trends in Antenna Engg. And Nanotechnology, MIT, Manipal

• Slot antennas- theory and recent application, Gauhati University

• 5G millimeterwave antennas and circuits using substrate integrated coaxial line (SICL) technology, Workshop on Advanced Design in RF, IEEE HMRITM Student Branch New Delhi

• Millimeterwave circuits and antennas, IEEE Young Scientist Conclave -2021 

• Millimeter Wave circuits and antennas, FDP on "Advanced Electromagnetics and Modern Antenna Design Principles'' , SSN College of Engineering Kalavakkam

• Application of Substrate Integrated Circuits in microwave and millimetre wave frequencies, Expert Talk in FDP entitled “The Trends of Research and Development of Electronics and Communication Area” AICTE Training and Learning (ATAL) National Institute of Technology Manipur, India 

• Basics of Antenna Measurement, National Workshop & Hands-on Training in Microwave Experiments (HTME-2022) to be organized by the Department of Physics, Kanoria PG Mahila Mahavidyalaya, Jaipur 

• “5G millimeter-wave antennas and circuits using substrate integrated coaxial line (SICL) technology” in AICTE-QIP sponsored Short Term Course titled “Electromagnetics: Recent Trends and Future Applications” at IIT Indore from February 28 to March 05, 2022.

• 5G millimeterwave antennas and circuits using substrate integrated coaxial line (SICL) technology, IEEE MTTS SBC, Jadavpur University 

• Annual Visitor Program, Department Of Electronic Science University of Delhi South Campus  

• Invited Talk in IEEE SBC, IIT Jammu

• Invited talk in Workshop on Standards-driven Research, IEEE COMSNETS 2023

• Moderator, Panel discussion on ““Standards Driven Research in Indian Academia: Achievements, Challenges and the Way Forward” in IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS) 2022