MEL

Microwave Engineering Laboratory
Tezpur University

Welcome To TU's Microwave Engineering Lab
The microwave engineering research group at Tezpur University is headed by Dr. Nidhi S Bhattacharyya and co-advised by Dr Satyajib Bhattacharyya. The group mostly focuses its research work in the areas of developing novel design microstrip antennas, engineered substrates, electromagnetic shielding materials (EMI) and also in computational electromagnetics.
To know more about us, please look into our website

ABOUT

Microwave Engineering Laboratory

The microwave communication systems which include both civilian and military linkage requires a wide bandwidth (>500 MHz typically), low impedance mismatch, conformability etc. Many airborne applications need conformal microwave antennas. The scientific contribution to these state-of-art microwave devices is the soul aim of microwave engineering laboratory (MEL) of Department of Physics. This group is doing widespread research on the field of microstrip antennas, engineered substrates, electromagnetic shielding materials (EMI) and computational electromagnetics. MEL has developed indigenous characterization technique for microwave frequencies and designed various experimental set-ups within the laboratory. The following are the highlights of MEL research group,

  1. Design of flexible microstrip antennas for military surveillance purpose
  2. Design and development of EMI shielding device and microwave absorbing materials using dielectric , magnetic composites
  3. Design and Development of particle filled composites and magnetodielectric substrates for ultra wide band (UWB) microstrip antennas.
  4. Development of high power handling materials for high power devices
  5. Development of analytical software using finite domain time difference technique for analyzing electric and magnetic field distribution in different microwave devices.






TEAM

Faculty members of MEL

  • Dr. Nidhi Saxena Bhattacharyya
    Ph.D. (University of Delhi) ,M.Sc. (University of Delhi)
    Professor, Department of Physics, Tezpur University
    Specialization: Microwave Materials & Technology, Instrumentation
    E-mail: ,
    Phone: (03712)267007(Ext.5555), 267083(R)
  • Dr. Satyajib Bhattacharyya.
    Co-Investigator
    Professor, Dept. of ECE, Tezpur University.
    Ph.D. (University of Delhi), M.Sc. (University of Delhi).
    Specialization : Microstrip Antennas, Arrays
    Phone :03712-267007#5255
    E-mail:

    • Current Ph. D. students of MEL

  • Mr. Pragyan Jyoti Gogoi
    M.Sc. (Tezpur University), Ph.D. (Full time 2012-till now)
    Specialization: Flexible microwave planar structures and antennas Also involved in the project entitled: “Studies of Ferromagnetic resonance in spinel ferrite and garnets for high power circulators”
    E-mail: ,
  • Mr. Rocktotpal Baruah
    M.Sc. (Gauhati University), Ph.D. (Full time 2014-till now)
    E-mail:
  • Mr. Dipangkar Borah
    M.Sc.(Physics) (IIT Guwahati), Ph.D. (Full time 2014-till now)
    Area of interest: EMI shielding materials
    Email-
  • Mr. Arunav Phukan
    M.Sc.(Physics) (Tezpur University), Ph.D. (Full time 2015-till now)
    Area of interest: Microstrip Antenna
    Also involved in the project entitled: “Microwave technology based tea processing system for NE states” (SAMEER, Mumbai).
    Email-
  • Mr. Dhruba Jyoti Gogoi
    M.Sc. (Physics) (Tezpur University), Ph.D. (Full time 2015-till now)
    Area of interest: EMI shielding materials
    Email-

    • Current Project Fellows

  • Mr. Deep Jyoti Das
    Junior Research Fellow
    Project title: “Microwave technology based tea processing system for NE states” (SAMEER, Mumbai)
    B. Tech. (Dept. of ECE) (Tezpur University)
    Email-

    • Former Ph. D. students of MEL

  • Dr. Juti R.Deka Saikia
    Ph.D. (Tezpur University)
    Presently Post Doctoral Fellow in the Dept of Mechanical Engineering, Chung YuanChristian University, Taiwan
    Specialization: Microwave Engineering
    Email-
  • Dr.Subasit Borah
    M.Sc. (Dibrugarh University), Ph.D. (Tezpur University)
    Presently Lecturer at NITS Engineering College, Mirza, Guwahati/Post Doctoral Fellow at IIT, Guwahati.
    Specialization: Microwave planar devices, Computational Electromagnetics, High Power Microwave Ferrite Devices
    Email-
  • Dr. Debasish Sarmah
    M.Sc (Tezpur University), Ph.D. (Tezpur University)
    Presently Lecturer at Royal School of Engineering and Technology, Guwahati
    Specialization: Microstrip Antennas on tailored substrates
    E-mail:
    Curriculum Vitae
  • Dr. Jyoti Prasad Gogoi
    Presntly Assistant Professor, Kaziranga University, Assam
    M.Sc.(Tezpur University), Ph.D.(Tezpur University)
    Specialization : Microwave absorbers, EMI Shielding materials
    E-mail:
    Curriculum Vitae
  • Dr. Kunal Borah
    M.Sc: (Tezpur University), Ph.D. (Tezpur University)
    Presently Assistant Professor, NERIST, Nirjuli, Arunachal Pradesh
    Specialization: UWB Microstrip antennas on Magnetodielectric substrates
    E-mail:
    Curriculum Vitae
  • Dr. Sikhajyoti Ozah
    M.Sc. (Tezpur University), Ph.D. (Tezpur University)
    Presently guest faculty at Dept. of Physics, Tezpur University Specialization: Computational electromagnetics, Microwave absorbers
    E-mail: ,
    Curriculum Vitae

RESEARCH

Electromagnetic Interference Shielding Materials

Wireless technology stride towards gigahertz frequency applications in modern communication system has increased the electromagnetic interference (EMI), hindering the normal operations. Electromagnetic Interference (EMI) suppression is a major challenge for wireless communication devices, strategic military devices, electronic and consumer goods industries.

The research group working on electromagnetic interference shielding materials is focused on developing thin and light weight and thermally stable broadband microwave absorbing material with capability of being applied to various types of applications in the frequency range of 8.2-12.4GHz.

Two type of microwave absorber are developed viz. dielectric microwave absorber (DMA) and magnetic microwave absorber (MMA).

DMA is composed of expanded graphite (EG)-novolac phenolic resin (NRP) composite. This EG is mixed with NPR in different weight ratios to obtain desired EG-NPR combination as microwave absorbing materials.

MMA is composed of nanosized M-type hexagonal ferrites viz. BaFe12019 and SrFe12019 mixed with NPR in different weight ratios.

EG-NPR composites gives maximum absorption of -44dB at 10.99GHz and 20 to 50 wt% EG-NPR composites can be used as reflecting shielding material giving S21~-43dB over the X-band. BaFe12O19/NPR composites give -20dB absorption bandwidth of 3.76GHz in the X-band.

The developed product will have use in mobile communications system, anechoic chamber, handheld devices, transmitting and receiving antennas, protecting circuits, strategic installations, human body from external radiation etc.

PROJECTS

MICROWAVE ENGINEERING LAB PROJECTS

Ongoing Projects

  • Project Title:“Microwave Technology based Tea Processing Systems for NE States”.
    Chief Investigator: Dr. Nidhi S. Bhattacharyya
    Co-Investigator: Dr. S Bhattacharyya
    Funding Agency (or Internal funding): SAMEER, Mumbai
    Financial Status (Total Project outlay, expenditure to date): 55.20 Lakhs
    Duration: 2 years (Ongoing; Initiated: September 2013)
    Project Fellows: Mr. Arunav Phukan & Mr. Deep Jyoti Das

  • Project Title: “Studies of Ferromagnetic resonance in spinel ferrite and garnets for high power circulators”.
    Chief Investigator: Dr. Nidhi S. Bhattacharyya
    Co-Investigator: Dr. S Bhattacharyya, Dr. Subasit Borah
    Funding Agency (or Internal funding): BRNS-DAE
    Financial Status (Total Project outlay, expenditure to date): 32.37 Lakhs.
    Duration: 3 years (Ongoing; Initiated: July 2014).
    Project Fellow: Mr. Pragyan Jyoti Gogoi.

    • Completed projects

  • Project Title:“Studies of Spin-Wave instability in Ferrites for High Power Circulators”.
    Chief Investigator: Dr. Nidhi S. Bhattacharyya
    Co-Investigator: Dr. P. Deb
    Funding Agency (or internal funding): BRNS-DAE
    Financial Status (Total Project outlay, expenditure to date): 42.57 lakhs, 42.57 Lakhs
    Duration: 5 years (Initiated: October 2007; Completed: March 2012)
    Project Fellow: Dr. Subasit Borah
  • Project Title:“Synthesis and development of broadband EMI shielding materials using magneto-dielectric nanoparticles”.
    Chief Investigator: Dr. Nidhi S. Bhattacharyya.
    Co-Investigator: Dr. S Bhattacharyya.
    Funding Agency (or internal funding): DIT
    Financial Status (Total Project outlay, expenditure to date): 86.98 lakhs, about 74 Lakhs
    Duration: 3 years (Initiated: May 2010; Completed: November 2013)
    Project Fellows: Dr. Jyoti Prasad Gogoi & Dr. Sikhajyoti Ozah.

Collaborators

Funding Agencies

  • Department of Electronics and information technology (DeitY), Govt. Of India.
  • Board for research in nuclear science (BRNS), Dept. of Atomic Energy (DAE), Govt. Of India

Collaborating Laboratories

  • Microwave Research Lab, dept. of electronics and communication, Tezpur University.
  • Society for applied microwave and electronics research (SAMEER), Mumbai.
  • AMTD, Raja Ramanna Centre for Advanced Technology (RRCAT), Dept. of Atomic Energy, Govt. Of India, Indore.

Publication

Download the details of Publications

Journals Publications

  • Single layer microwave absorber based on expanded graphite–novolac phenolic resin composite for X-band applications, JP Gogoi, NS Bhattacharyya, S Bhattacharyya, Composites Part B: Engineering 58, 518-523, 2014.
  • Study of graded composite (LDPE/TIO 2) materials as substrate for microstrip patch antennas in X-band, D Sarmah, NS Bhattacharyya, S Bhattacharyya, Dielectrics and Electrical Insulation, IEEE Transactions on, 20 (5), 1845-1850, 2013.
  • Nanosized barium hexaferrite in Novaloc Phenolic Resin as microwave absorber for X band application, S Ozah, NS Bhattacharyya, Journal of Magnetism and Magnetic Materials, 2013.
  • 4. Magnetodielectric composite with NiFe2O4 inclusions as substrates for microstrip antennas, K Borah, NS Bhattacharyya, Dielectrics and Electrical Insulation, IEEE Transactions on, 19 (5), 1825-1832, 2012.
  • Broadband magneto-dielectric response of particulate ferrite polymer composite at microwave frequencies, S Borah, NS Bhattacharyya, Composites Part B: Engineering 43 (4), 1988-1994, 2012
  • Synthesis and microwave characterization of expanded graphite/novolac phenolic resin composite for microwave absorber applications, JP Gogoi, NS Bhattacharyya, KC Raju Composites Part B: Engineering, 2011
  • EM Transmission Response of Microstrip Notch Filter on Obliquely Magnetized Magneto-Dielectric Substrate in Xband Under Influence of Low Magnitude of External DC Magnetic Field, S Borah, NS Bhattacharyya, Progress In Electromagnetics Research 21, 47-59, 2011.
  • Modified interphase theory to determine dielectric constant of particulate composite material at microwave frequency, NS Bhattacharyya, B Choudhury, JR Deka, Composites Part B: Engineering 43 (3), 1665-1670, 2010.
  • Magneto-dielectric material with nano ferrite inclusion for microstrip antennas: dielectric characterization, K Borah, N Saxena Bhattacharyya, Dielectrics and Electrical Insulation, IEEE Transactions on 17 (6), 1676-1681, 2010.
  • Broadband Measurement of Complex Permittivity of Composite at Microwave Frequencies Using Scalar Scattering Parameters, S Borah, NS Bhattacharyya, Progress In Electromagnetics Research 13, 53-68, 2010
  • Study of LDPE/TiO 2 and PS/TiO 2 Composites as Potential Substrates for Microstrip Patch Antennas, D Sarmah, JR Deka, S Bhattacharyya, NS Bhattacharyya, Journal of electronic materials, 1-7, 2010.
  • Magneto-dielectric material with nano ferrite inclusion for microstrip antennas: dielectric characterization, K Borah, N Saxena Bhattacharyya, Dielectrics and Electrical Insulation, IEEE Transactions on 17 (6), 1676-1681, 2010.
  • Improved Microwave and Thermal Properties of LDPE/TiO2 Composite Polymer System A Gogoi, D Sarmah, NS Bhattacharyya, Journal of Polymer Materials 25 (3), 328, 2008.
  • 14. Development of Particulate Magneto-Polymer Composite with Reduced Magnetic Losses S Borah, NS Bhattacharyya, Journal of Polymer Materials 25 (3), 323, 2008.
  • Development of a low cost automated PC-based insertion loss measurement set-up using a simple source and detector in X-band, JR Deka, NS Bhattacharyya, S Bhattacharyya, IETE Technical review 22 (6), 425-434, 2005
  • On the instability threshold of cobalt substituted Ni–Al ferrite at high-microwave-power levels, NS Bhattacharyya, GP Srivastava, Journal of magnetism and magnetic materials 262 (2), 212-217, 2003.

Conference Proceedings

  • Microwave absorption properties of graphite flakes-phenolic resin composite, JP Gogoi, PJ Gogoi, NS Bhattacharyya, International Conference on Communication and Electronics System Design, 2013.
  • Effect of annealing temperature of nano-sized BaFe12O19 in Novolac phenolic resin on microwave properties for use as EMI shielding material in X-band, S Ozah NS Bhattacharyya,International Conference on Communication and Electronics System Design,2013.
  • Influence of external magnetic biasing on rectangular patch antenna designed on nano-Co/Ni Fe2O4 magnetodielectric substrates, K Borah, A Phukan, NS Bhattacharyya, International Conference on Communication and Electronics System Design,2013
  • Expanded graphite/Novolac phenolic resin composite as single layer electromagnetic wave absorber for x-band applications, JP Gogoi, NS Bhattacharyya, International Conference on Communication and Electronics System Design, 2013.
  • Study of LDPE/Al2O3 composite material as substrate for microstrip antenna, D Sarmah, NS Bhattacharyya, S Bhattacharyya, JP Gogoi, International Conference on Communication and Electronics System Design, 2013
  • Microwave Characterization of Expanded Graphite/Phenolic Resin Composite for Strategic Applications, JP Gogoi, NS Bhattacharyya, Session 4P6 Plasmas, Composite Media, Materials Science, 896, 2012
  • Miniaturized Patch Antennas on Magnetodielectric Substrate for X Band Communications, K Borah, NS Bhattacharyya, Devices and Communications (ICDeCom), 2011 International Conference on, 1-3, 2011
  • GCPWG technique for measurement of dielectric properties of magneto-polymer composite at microwave frequencies, S Borah, NS Bhattacharyya, Applied Electromagnetics Conference (AEMC), 1-3, 2009.
  • Ni 0.5 Zn 0.5 Fe 2 O 4/bamboo charcoal/titania LDPE composites as viable microwave absorbing materials, JP Gogoi, S Sarmah, D Sarmah, NS Bhattacharyya, Applied Electromagnetics Conference (AEMC), 2009, 1-4.
  • In touch non-destructive superstrate technique for estimating complex permittivity of nanocomposites, K Borah, NS Bhattacharyya, Applied Electromagnetics Conference (AEMC), 2009, 1-3.
  • Synthesis and characterization of reduced size ferrite reinforced polymer composites, S Borah, NS Bhattacharyya, AIP Conference Proceedings 1003, 261, 2008
  • Development of LDPE/TiO2 composite as substrate material in microwave integrated circuits, A Gogoi, NS Bhattacharyya - INDIAN JOURNAL OF PHYSICS AND PROCEEDINGS OF THE INDIAN ASSOCIATION FOR THE CULTIVATION OF SCIENCE, 2008.
  • Microwave characterization of Alumina filled Polystyrene composite, JR Deka, NS Bhattacharyya, Proc. 2nd IASTED Int. Conf. Antennas, Radar, and Wave Propagat., 2005.
  • 14. Microstrip stub resonator on ferrite substrate, NS Bhattacharyya, S Bhattacharyya Antennas and opagation Society International Symposium, 2003. IEEE 3, 512-514.

Instruments

Agilent E8362C Vector Network Analyzer (VNA)

    • 4πMs and Curie temperature measurement set up

    • AC/DC conductivity measurement set up (four probe method)

    • Variable pole electromagnet

    • High power measurement set up

    • Muffle furnace

    • Tubular furnace

    • Radiation Pattern measurement set up (MEL Lab, ECE, TU)

    • Ultrasonicator

    • Components for microwave measurements (waveguides, circulators, rotary joint, Gunn diode, klystron etc.)

Contact