mthottappan.ece's picture
Dr. M. Thottappan
Associate Professor
Department of Electronics Engineering, Indian Institute of Technology
mthottappan.ece@iitbhu.ac.in
+91 8825489206
Area of Interest: 
RF & Microwave Engineering, High Power Microwave (HPM) Devices

M. Thottappan obtained his Ph.D. in the area of " Microwave and Millimeter Wave Vacuum Electron Beam High Power Gyrotron Travelling Wave Amplifier" from the Indian Institute of Technology (BHU), Varanasi, in 2013 and he was awarded UK Commonwealth Professional Fellowship-2017 to work at the Department of Engineering, Lancaster University, Lancaster, UK.

His current research interests include:

  • Millimetre Wave and Terahertz Vacuum Electron Beam Devices and their Applications
  • High Power Microwaves for Defense Applications
  • Mode Convertors / High Power Antennas for Microwave / Millimeter Wave Applications
  • Gyrotron Travelling Wave Amplifiers

Under Graduate Course

1. Electromagnetic Waves and Transmission Lines

2. Microwave Engineering

Post Graduate  Course

1. Microwave O-Type Tubes

2. Microwave M-Type Tubes

  1. Mumtaz Ali ansari and M.Thottappan, “Design and Performance Analyses of High Efficiency X-band Relativistic Backward Wave Oscillator using an Improved Resonant Reflector under Low Guiding Magnetic Field," IEEE Transactions on Plasma Science, vol. 47, no. 4, pp. 1754-1761, Apr. 2019.
  2. Anshu Sharan Singh, and M.Thottappan, “ RF Coupling and Beam-Wave Interaction Study in a Periodically Loaded X-band 25 MW Gyro-twystron,” IEEE Transactions on Electron Devices, vol. 65, no. 11, pp. 5089-5096, Nov. 2018.
  3. Anshu Sharan Singh, and M.Thottappan, “ Stability Study in Dielectric Ring Loaded Periodic Interaction Structure for a Mega-Watt Class Gyro-twystron,” IEEE Transactions on Electron Devices, vol. 65, no. 10, pp. 4585-4591, Oct. 2018.
  4. Mumtaz Ali ansari and M.Thottappan, “Analysis, Design, and 3D-Simulation of a High Efficiency Overmoded Non-uniform Relativistic Backward Wave Oscillator,” IEEE Transactions on Electron Devices, vol. 65, no. 3, pp. 1158-1163, March 2018.
  5. Amit Arora, M. Thottappan and P. K. Jain, “Particle-In-Cell Simulation of a Millimeter Wave Gyrotron Travelling Wave Amplifier,” International Journal of Microwave and Optical Technology, vol.12, no.1, pp.37-44, Jan. 2017.
  6. Anshu Sharan Singh, S. Yuvaraj, and M.Thottappan, “Analytical and PIC Simulation Studies of a Mega-Watt Class Gyro-Twystron Amplifier,” IEEE Transactions on Electron Devices, vol. 63, no. 10, pp. 4104-4112, Oct. 2016.
  7. Amit Arora, M. Thottappan and P. K. Jain, “Design and Stability Studies of Second Harmonic Gyro-TWT Amplifier Using Wedge-Shaped Lossy Ceramic Rods Loaded Mode Selective RF Interaction Circuit,” IEEE Transactions on Plasma Science, vol. 44, no. 10, pp.` 2340 - 2347, Oct. 2016.
  8. Amit Arora, M. Thottappan and P. K. Jain, “Particle-In-Cell Simulation of Uniformly Loaded W-band Gyro-TWT to Study its Multi-Mode Beam-Wave Interaction Behavior,” International Journal of Microwave Applications, vol. 5, no. 5, pp. 41 - 47, Oct. 2016.
  9. M.Thottappan, Pardeep Singh and P.K.Jain, “Gyro-TWT Using a Metal PBG Waveguide as its RF Circuit — Part II: PIC simulation and Parametric Analysis”, IEEE Transactions on Electron Devices, vol. 63, no. 5, pp. 2125-2131, May 2016.
  10. M.Thottappan, Sukwinder Singh and P.K.Jain, “Gyro-TWT Using a Metal PBG Waveguide as its RF Circuit — Part I: Analysis and Design”, IEEE Transactions on Electron Devices, vol. 63, no. 5, pp. 2118-2124, May 2016.
  11. M.Thottappan, and P.K.Jain, “Nonlinear Investigation and 3-D Particle Simulation of Second Harmonic Gyro-TWT with a Mode Selective RF Circuit”, IEEE Transactions on Electron Devices, vol. 62, no. 5, pp. 1641-1647, May 2015.
  12. M.Thottappan, Yuvaraj S., and P.K.Jain, “3-D PIC Simulation of a Gyro-Twystron Amplifier using “MAGIC”, IEEE Transactions on Plasma Science, vol. 43, no. 1, pp. 398-404, Jan. 2015.
  13. M.Thottappan, Surya Prakash Singh and P.K.Jain, “Analysis and PIC Simulation of Gyrotron Travelling Wave Tube Amplifier”, Journal of Microwaves, Optoelectronics and Electromagnetic Applications, vol. 12, no. 2, pp. 307-324, Dec. 2013.
  14. M.Thottappan and P.K.Jain, “Analysis, Design and Simulation of Metal PBG Waveguide”, International Journal of Microwave and Optical Technology, vol.8, no.2, pp.61-68, March 2013.
  15. M.Thottappan and P.K.Jain, “PIC Simulation of a Gyro-TWT Amplifier to Study its Beam-Wave Interaction Behavior”, International Journal of Microwave Applications, vol.1, no.1, pp.13-19, Dec. 2012.
  1. Akash and M.Thottappan, “Design and Simulation of W-band Second Harmonic Periodically Loaded Gyro-TWT Amplifier,” 20th International Vacuum Electronic Conference (IVEC) 2019, IEEE International, Busan, South Korea, 28th Apr. - 1st May, 2019 (Accepted).
  2. Mumtaz Ali Ansari and M.Thottappan, “Design and Simulation of an X-Band RBWO using Non-uniform Bragg Structure,” 20th International Vacuum Electronic Conference (IVEC) 2019, IEEE International, Busan, South Korea, 28th Apr. - 1st May, 2019 (Accepted).
  3. Rajanish Kumar Singh and M.Thottappan, “Mode Analysis and Design of PBG Cavity for Tunable Gyrotron”, URSI Asia Pacific Radio Science Conference (AP-RASC)-2019, New Delhi, India, March 9-15th, 2019.
  4. Akash and M.Thottappan, “3D Beam-Wave Interaction Study in a Dielectric Loaded W-band Gyro-TWT using MAGIC”, IEEE MTT-S International Microwave and RF Conference (IMaRC)-2018, Kolkata, India, Nov. 28-30th, 2018.
  5. Mumtaz Ali Ansari and M.Thottappan, “Study of Improved Cavity Resonant Reflector for an X-Band Relativistic Backward Wave Oscillator”, IEEE MTT-S International Microwave and RF Conference (IMaRC)-2018, Kolkata, India, Nov. 28-30th, 2018.
  6. S. G. Yadav, A.S. Singh, and M.Thottappan, “ 3D Particle-In-Cell Simulation of W-band Gyro-Twystron Amplifier”, IEEE MTT-S International Microwave and RF Conference (IMaRC)-2018, Kolkata, India, Nov. 28-30th, 2018.
  7. Anshu Sharan Singh and M.Thottappan, “Analysis of Pre-bunching RF Sections for Weakly Relativistic Gyro-Twystron,” National Symposium on Vacuum Electronic Devices & Applications (VEDA)-2018, IIT, Guwahati, India, 22-24th Nov., 2018.
  8. V. Veera Babu, Anshu Sharan Singh, Smrity Dwivedi and M.Thottappan, “Design Studies of a Ka-band Gyro-Twystron,” National Symposium on Vacuum Electronic Devices & Applications (VEDA)-2018, IIT, Guwahati, India, 22-24th Nov., 2018
  9. V. Venkata Reddy, Mumtaz Ali Ansari and M.Thottappan, “Design Studies on S-Band Uniform Relativistic Backward Wave Oscillator,” National Symposium on Vacuum Electronic Devices & Applications (VEDA)-2018, IIT, Guwahati, India, 22-24th Nov., 2018.
  10. Akash and M.Thottappan, “Numerical Analysis of Resistively Loaded Waveguide for W-band Gyro-TWT,” National Symposium on Vacuum Electronic Devices & Applications (VEDA)-2018, IIT, Guwahati, India, 22-24th Nov., 2018.
  11. S. G. Yadav, A.S. Singh, and M.Thottappan, “Beam-Wave Interaction Studies of W-band Gyro-twystron,” National Symposium on Vacuum Electronic Devices & Applications (VEDA)-2018, IIT, Guwahati, India, 22-24th Nov., 2018.
  12. Mumtaz Ali Ansari and M.Thottappan, “PIC Simulation of Relativistic Backward Wave Oscillator using Bragg Structure,” National Symposium on Vacuum Electronic Devices & Applications (VEDA) - 2018, IIT, Guwahati, India, 22-24th Nov., 2018.
  13. Rajanish Kumar Singh and M.Thottappan, “Design and Simulation of CW Tunable Gyrotron using PBG Cavity as its RF Circuit,” German Microwave Conference (GeMiC)-2018, Freiburg, Germany, March 12-14th, 2018.
  14. Akash and M.Thottappan, “PIC Simulation of Uniformly Loaded Gyro-TWT,” National Symposium on Vacuum Electronic Devices & Applications (VEDA), IIT, Roorkee, India, 17-19th Nov., 2017.
  15. Dhananjay Kumar, Mumtaz Ali Ansari and M.Thottappan, “PIC-Simulation of an S-Band non-uniform Relativistic Backward Wave Oscillator,” National Symposium on Vacuum Electronic Devices & Applications (VEDA), IIT, Roorkee, India, 17-19th Nov., 2017.
  16. Rajanish Kumar Singh and M.Thottappan, “Design and Cold Simulation of Metal PBGCavity for THz Gyrotron,” National Symposium on Vacuum Electronic Devices & Applications (VEDA), IIT, Roorkee, India, 17-19th Nov., 2017.
  17. Anshu Sharan Singh and M.Thottappan, “Multimode Analysis of Periodically Loaded Gyro-twystron Amplifier,” National Symposium on Vacuum Electronic Devices & Applications (VEDA), IIT, Roorkee, India, 17-19th Nov., 2017.
  18. Arjun Kumar, M. Thottappan, and   P. K. Jain, “Study of Asymmetric Mode Generation in Magnetically Insulated Line Oscillator,” National Symposium on Vacuum Electronic Devices & Applications (VEDA), IIT, Roorkee, India, 17-19th Nov., 2017.
  19. Prabhakar Tripathi, Manpuran Mahto, M. Thottappan, and P. K. Jain, “Studies of a Megawatt-Class Gridless Reltron Oscillator,” National Symposium on Vacuum Electronic Devices & Applications (VEDA), IIT, Roorkee, India, 17-19th Nov., 2017.
  20. Mumtaz Ali Ansari and M.Thottappan, “Design and Simulation of a High efficiency Relativistic Backward Wave Oscillator,” 18th International Vacuum Electronic Conference (IVEC) 2017, IEEE International, London, UK, 24-26th Apr., 2017.
  21. Rajanish Kumar Singh and M.Thottappan, “Design and Cold Simulation of a Metal PBG Cavity for Sub-millimeter Wave Gyrotron,” 18th International Vacuum Electronic Conference (IVEC) 2017, IEEE International, London, UK, 24-26th Apr., 2017.
  22. Akash and M.Thottappan, “Particel-In-Cell Simulation of W-band Gyro-TWT,” National Conference on Emerging Trends in Vacuum Electronic Devices & Applications (VEDA), IPR, Gandhinagar, India, 16-18th March, 2017.
  23. Mumtaz Ali Ansari, Dhananjay Kumar, and M.Thottappan, “Design and Simulation of an X-band Relativistic Backward Wave Oscillator,” National Conference on Emerging Trends in Vacuum Electronic Devices & Applications (VEDA), IPR, Gandhinagar, India, 16-18th March, 2017.
  24. Dhananjay Kumar, Mumtaz Ali Ansari, and M.Thottappan, “PIC Simulation of an S-band Relativistic Backward Wave Oscillator,” National Conference on Emerging Trends in Vacuum Electronic Devices & Applications (VEDA), IPR, Gandhinagar, India, 16-18th March, 2017.
  25. Rajanish Kumar Singh and M.Thottappan, “PIC Simulation Studies of a High Power Millimeter Wave Gyrotron,” National Conference on Emerging Trends in Vacuum Electronic Devices & Applications (VEDA), IPR, Gandhinagar, India, 16-18th March, 2017.
  26. Rajanish Kumar Singh and M.Thottappan, “Design and PIC Simulation Studies of a Millimeter Wave Gyrotron for DNP/NMR Applications,” National Conference on Emerging Trends in Vacuum Electronic Devices & Applications (VEDA), IPR, Gandhinagar, India, 16-18th March, 2017.
  27. Anshu Sharan Singh and M.Thottappan, “Particel-In-Cell Simulation of Ka-band Gyro-Twystron,” National Conference on Emerging Trends in Vacuum Electronic Devices & Applications (VEDA), IPR, Gandhinagar, India, 16-18th March, 2017.
  28. Anshu Sharan Singh and M.Thottappan, “Analytical and PIC Simulation Studies of Ka-band Gyro-Twystron Amplifier,” Asia Pacific Microwave Conference (APMC) 2016, New Delhi, India, 5-9th Dec., 2016.
  29. Rajanish Kumar Singh and M.Thottappan, “PIC Simulation of a Millimeter Wave Gyrotron for DNP/NMR Applications,” International Conference on Industrial and Information Systems (ICIIS) -2016, IIT-Rookee, India, 3-4th Dec., 2016.
  30. Rajanish Kumar Singh and M.Thottappan, “Design and Simulation Studies of a Metal PBG Cavity for Millimetre Wave Gyrotrons”, 37th Progress in Electromagnetic Research Symposium (PIERS) -2016, Shanghai, China, August 8-11th, 2016.
  31. Rajanish Kumar Singh and M.Thottappan, “Particle-in-Cell (PIC) Simulation of a 250 GHz Gyrotron”, 37th Progress in Electromagnetic Research Symposium (PIERS)-2016, Shanghai, China, August 8-11th, 2016.
  32. Anshu Sharan Singh and M.Thottappan, “Design and PIC Simulation of a Mega-Watt Class Gyro-Twystron”, 37th Progress in Electromagnetic Research Symposium (PIERS)-2016, Shanghai, China, August 8-11th, 2016.
  33. Anshu Sharan Singh and M.Thottappan, “Design and PIC Simulation a Stagger Tuned Gyro-twystron”, 37th Progress in Electromagnetic Research Symposium (PIERS)-2016, Shanghai, China, August 8-11th, 2016.
  34. M.Thottappan, and P.K.Jain, “Particle-In-Cell Simulation of gyro-TWT using a Metal PBG Circuit”, German Microwave Conference (GeMiC)-2015, Nuremberg, Germany, March 16-18th, 2015, (ISBN 978-3-9812668-6-3)
  35. Amit Arora, M.Thottappan, and P.K.Jain, “Time-Dependent Nonlinear Analysis of Gyro-TWT Amplifier,” National Conference on Recent Advances in Electronics & Computer Engineering, RAECE -2015, IIT Roorkee, India, Feb.13-15, 2015.
  36. M.Thottappan, and P.K.Jain, “Cold Measurement of a Ka-Band Metal PBG Waveguide”, IEEE MTT-S International Microwave and RF Conference (IMaRc)-2014, Bangalore, India, Dec. 15-17, 2014.
  37. M.Thottappan, and P.K.Jain, “Design and Simulation of Metal PBG Waveguide Mode Launcher”, IEEE Region 10 Technical Symposium (TENSYM) 2014, Kuala Lumpur, Malaysia, April 2014.
  38. Sachin Kalraiya, Hari Shankar Singh, Manoj Kumar Meshram, and M.Thottappan,  “Microstripline-Fed Dual Band Printed Monopole Antenna for WLAN/WiMAX/HIPERLAN Applications”, IEEE Region 10 Technical Symposium (TENSYM)- 2014, Kuala Lumpur, Malaysia, April 2014.
  39. Yuvaraj S.,  M.Thottappan, and P.K.Jain, “Design and Simulation of 94 GHz Metal PBG Waveguide”, IEEE MTT-S International Microwave and RF Conference (IMaRc)- 2013, Delhi, India, 14-16 Dec. 2013.
  40. Yuvaraj S., M.Thottappan, and P.K.Jain, “Analytical Study of High Power Gyro-Twystron”, 9th International Conference on Microwaves, Antenna, Propagation & Remote Sensing, ICMARS-2013, Jodhpur, India, Dec. 11 – 14, 2013.
  41. Pushpalata Laxman Pakhale, M.Thottappan, and P.K.Jain. “PIC Simulation of Second Harmonic Ka-band Gyro–TWT”,  9th International Conference on Microwaves, Antenna, Propagation & Remote Sensing, ICMARS-2013, Jodhpur, INDIA, Dec. 11 – 14, 2013.
  42. Yuvaraj S., M.Thottappan, and P.K.Jain, “High Power Gyro-Twystron- A Review”, VEDA KOLLEG 2013 at IIT Roorkee, India, 18-20th Oct. 2013.
  43. Pushpalata Laxman Pakhale, M.Thottappan, and P.K.Jain. “PIC Simulation of Second Harmonic Gyro –TWT Amplifier”, VEDA KOLLEG 2013 at IIT Roorkee, India, 18-20th Oct. 2013.
  44. M.Thottappan,  Sukwinder Singh, and P.K. Jain, “Second Harmonic High Power Gyro-TWT Amplifier”, VEDA KOLLEG 2013 at IIT Roorkee, India, 18-20th Oct. 2013.
  45. M.Thottappan, and P.K.Jain, “Particle-in-Cell  Simulation of 35 GHz Gyro-TWT Amplifier”, 8th  International Conference on Microwaves, Antenna, Propagation & Remote Sensing, ICMARS-2012, Jodhpur, India, pp. 876-880, Dec. 11 – 15, 2012.
  46. Sukwinder Singh, M.Thottappan, and  P.K.Jain “Numerical Simulations of Gyro-TWT Amplifier Using Metal PBG Waveguide”, 8th  International Conference on Microwaves, Antenna, Propagation & Remote Sensing, ICMARS-2012, Jodhpur, India, pp. 863-867, Dec. 11 – 15, 2012.
  47. Pardeep Singh, M.Thottappan, and P.K.Jain, “Design and Simulation Metal Photonic Band Gap Waveguide for Ka-Band Gyro-TWT amplifier”, 8th  International Conference on Microwaves, Antenna, Propagation & Remote Sensing, ICMARS-2012, Jodhpur, India, pp. 860-862, Dec. 11 – 15, 2012.
  48. M.Thottappan, and P.K.Jain, “Design and Simulation Metal Photonic Band Gap Waveguide for Gyro-TWT amplifier,” National Conference on Vacuum Electron Devices & its Applications (VEDA-2012), Pilani, India, 21-24, Sep. 2012.
  49. M. Thottappan, and P. K. Jain, “Beam-wave Interaction simulation of gyro-TWT amplifier,” National Conference on Recent Trends on Microwave Techniques and Applications (Microwave-2012), Jaipur, India, 30th  July to 1st  Aug. 2012.
  50. Surya Prakash Singh, Gaurav Singh Baghel, M. Thottappan, and P. K. Jain, “Modeling and Simulation of a 250 GHz Metal PBG Waveguide for Gyrotron Amplifier”, IEEE International Conference on Computing, Electronics and Electrical Technologies [ICCEET], pp. 828-831, March 2012.
  51. Lalit Gathre, M. Thottappan, and P. K. Jain, “Analysis of PBG Structures using FDTD Algorithm”, IEEE International Conference on Computing, Electronics and Electrical Technologies [ICCEET], pp. 825-827, March 2012.
  52. M.Thottappan, and P.K.Jain, “Analysis of two dimensional metal electromagnetic band gap (EBG) structure using finite difference time domain method”, IVEC 2011, IEEE International, pp.311 – 312, Feb. 2011.
  53. M.Thottappan,  Pathak, A.K.,  and P.K.Jain, “Study of Metal Photonic Band Gap structures for Gyrotron”, National Symposium on Vacuum Technology and its Applications to Electronic Devices & Systems, 11-13th Nov. 2009, CEERI, CSIR, Pilani,  India.
  54. M.Thottappan,  Pathak, A.K., and P.K.Jain, “Simulation of Linear waveguides in Photonic Crystal Slab”, Symposium on Vacuum Electronic Devices and Applications, VEDA 2009, 8-10th Jan. 2009, BHU, Varanasi.
  55. Kalivaraprasad Reddy, D., M.Thottappan,  and P.K.Jain, “Analysis and simulation of folded waveguide slow wave guide structures for millimeter wave TWTs”, Symposium on Vacuum Electronic Devices and Applications, VEDA 2009, 8-10th Jan. 2009, BHU, Varanasi.
  56. Pathak, A.K.,  M.Thottappan, and  P.K.Jain, “Study of Metal Photonic Band Gap structures for millimeter wave Gyro-TWTs”, 7th Indian conference on Microwave, Antenna, Propagation and Remote sensing, 9-11th December 2008, InCMARS, Jodhpur, India.

Research Projects (Under Execution)

  1. Analysis, Design, Fabrication and Measurement of Metal Photonic Band Gap (PBG) Waveguide for Millimeter Wave Gyro-TWT Amplifiers, (Principle Investigator), for Rs. 15 Lacs, Since January 2018, for 2 years.

Research Projects (Completed)

  1. Electromagnetic Analysis, Design and Simulation of an X-band Gyro-Twystron Amplifier, Sponsored by SERB, DST, India (Principle Investigator), under Young Scientist Scheme - for Rs. 29.10 Lacs,  Oct. 2015 - Oct. 2018.
  2. Analysis, Design and Simulation of S-band MILO, Sponsored by Defense Research and Development Organization  (DRDO), India (Co-Principle Investigator) – for Rs. 45.85 Lacs, June 2013 - June 2016.

Ph.D. Theses:

  1. Mr. Amit Arora - Multimode Time Dependent Analysis and Simulation Studies of the Gyro-TWT Amplifier (Awarded in June 2017)
  2. Mr. Anshu Sharan Singh -  (Registred in 2014)
  3. Mr. Akash - (Registered in 2015)
  4. Mr. Rajanish Kumar Singh - (Registered in 2015)
  5. Mr. Mumtaz Ali Ansari - (Registered in 2015)
  6. Mr. Shyam Gopal Yadav (Registered in 2016)
  7. Mr. V. Venkata Reddy (Registered in 2017)
  8. Mr. Gundu Venkatesh (Registered in 2017)
  9. Mr. Vangalla Veerababu (Registered in 2017)

1. EM Simulation Software:

(i) MAGIC Pro-3D Suite
(ii) E-Gun Particle Optics Program
(iii) High Frequency Structure Simulator
(iv) CST Microwave Studio Suite

2. Computational Machines:

High end design work station computers with dual Intel Xeon Processor & add-on of Nvidia Tesla GPU Co-processor for simulating Microwave, Millimeter & Sub-millimeter wave active vacuum devices and also passive devices - 6 Nos.