DR. GOPIKRISHNA M.

Ultra Wide-band Systems

UWB, or Ultra-Wide Band technology offers many advantages, especially in terms of very high data transmission rates which are well beyond those possible with currently deployed technologies such as 802.11a, b, g, WiMax and the like. Ultra-wide band systems transmit and  receive ultrashort electromagnetic pulses  having limited effective radiated power. The system performance is determined primarily by the characteristics of the radiators that have to conform to stringent frequency and time domain requirements in the entire operating band. These requirements are namely, a nondispersive phase center; constant radiation and impedance over the frequency range with no excitation of higher order modes.

In my research, I have proposed various antenna topologies suitable for UWB systems and have characterized them both in the frequency and time domains. For good time domain performance, resonances in the antenna within the operating band as well as the physical size of the antenna has to be minimum; the former condition will minimize internal reflections in the antenna geometry while the latter will make sure that there are no changes in the phase center of the antenna.

Publications in International Journals
  1. M. Gopikrishna, D. D. Krishna, C. K. Aanandan, A Compact Rectangular Monopole Antenna Design with a Novel Feed for an Improved UWB  performance, Radioengineering, 27(1), April 2018, pp 63-69, doi:10.13164/re.2018.0063, Impact Factor – 0.945
  2. P Thomas, DD Krishna, M Gopikrishna , UG Kalappura, CK Aanandan, Compact planar ultra-wideband bevelled monopole for portable UWB systems, Electronics letters 47 (20), 1112-1114, 2011, Impact Factor – 1.068
  3. P Thomas, M Gopikrishna , CK Aanandan, P Mohanan, K Vasudevan, A compact pentagonal monopole antenna for portable UWB systems, Microwave and Optical Technology Letters 52 (10), 2390-2393, 2010, Impact factor – 0.623
  4. Krishna, D.D., Gopikrishna, M. , Aanandan, C.K., Mohanan, P. and Vasudevan, K., Ultra‐wideband slot antenna with band‐notch characteristics for wireless USB dongle applications, Microwave and Optical Technology Letters, 51(6), pp.1500-1504, 2009, Impact Factor – 0.623
  5. M Gopikrishna , DD Krishna, CK Aanandan, P Mohanan, K Vasudevan, Design of a microstip fed step slot antenna for UWB communication, Microwave and Optical Technology Letters 51 (4), 1126-1129, 2009, Impact Factor – 0.623 
  6. DD Krishna, M Gopikrishna , CK Aanandan, P Mohanan, K Vasudevan, Compact wideband Koch fractal printed slot antenna, IET microwaves, antennas & propagation 3 (5), 782-789, 2009, Impact Factor – 0.969
  7. M Gopikrishna , DD Krishna, CK Anandan, P Mohanan, K Vasudevan, Design of a compact semi-elliptic monopole slot antenna for UWB systems, IEEE Transactions on Antennas and Propagation 57 (6), 1834-1837, 2009, Impact Factor – 2.459
  8. Krishna, D.D., Gopikrishna, M. , Aanandan, C.K., Mohanan, P. and Vasudevan, K., Ultra-wideband slot antenna for wireless USB dongle applications, Electronics Letters, 44(18), pp.1057-1058, 2008, Impact Factor – 1.068
  9. R Gayathri, TU Jisney, DD Krishna, M Gopikrishna , CK Aanandan, Band-notched inverted-cone monopole antenna for compact UWB systems, Electronics Letters 44 (20), 1170-1171, 2008, Impact Factor – 1.068
  10. M Gopikrishna , DD Krishna, CK Aanandan, P Mohanan, K Vasudevan, Compact linear tapered slot antenna for UWB applications, Electronics letters 44 (20), 1174-1175, 2008, Impact Factor – 1.068
  11. DD Krishna, M Gopikrishna , CK Aanandan, P Mohanan, K Vasudevan, Compact dual band slot loaded circular microstrip antenna with a superstrate, Progress In Electromagnetics Research 83, 245-255, 2008, Impact Factor – 5.298
  12. DD Krishna, M Gopikrishna , C K Anandan, P Mohanan, K Vasudevan, CPW-fed Koch fractal slot antenna for WLAN/WiMAX applications, IEEE Antennas and Wireless Propagation Letters 7, 389-392, 2008, Impact Factor – 1.948
  13. D D Krishna, M Gopikrishna , C K Aanandan, P Mohanan, K Vasudevan, Planar elliptical UWB antenna with band-notch characteristics, International Journal on Wireless & Optical Communications 4 (02), 183-194, 2007
  14. A R Chandran, M Gopikrishna , CK Aanandan, P Mohanan, K Vasudevan, Scattering behaviour of fractal based metallo-dielectric structures, Progress In Electromagnetics Research 69, 323-339, 2007, Impact Factor – 5.298
  15. M Gopikrishna , DD Krishna, AR Chandran, CK Aanandan, Square monopole antenna for ultra wide band communication applications, Journal of Electromagnetic Waves and Applications 21 (11), 1525-1537, 2007, Impact Factor – Not available
  16. AR Chandran, M Gopikrishna , CK Aanandan, P Mohanan, K Vasudevan, Radar cross-section enhancement of dihedral corner reflector using fractal-based metallo-dielectric structures, Electronics Letters 42 (20), 1135-1136, 2006, Impact factor – 1.068
  17. DD Krishna, M Gopikrishna , CK Aanandan, P Mohanan, K Vasudevan, Compact dual-polarised square microstrip antenna with triangular slots for wireless communication, Electronics Letters 42 (16), 894-895, 2006, Impact factor – 1.068
Publications in International Conferences
  1. M Gopikrishna , CK Aanandan, A Novel J Slot Antenna with constant radiation pattern for UWB WiMedia, Proceedings of the International Conference on Computing, Communication and Signal Processing, ICCCSP 2016, McGraw Hill Education, 98-101
  2. M Gopikrishna , DD Krishna, C Gopakumar, CK Aanandan, A Novel J Slot Antenna for UWB WiMedia, Procedia Computer Science 93, 89-93, 2016
  3. M Gopikrishna , DD Krishna, CK Aanandan, Design of a compact rectangular strip monopole antenna for UWB systems, Microwave Conference (EuMC), 2011 41st European, 253-256
  4. DD Krishna, M Gopikrishna , CK Aanandan, A compact printed inverted cone antenna for UWB based applications, Electromagnetic Theory (EMTS), 2010 URSI International Symposium on, 420-423
  5. AO Lindo, Anju P Mathews, M Gopikrishna , Nurul Osman, Robert Leigh, Charles Free, Aanandan Chandroth, Parallel and end coupled microstrip band pass filters at W-band, Microwave Conference, 2009. APMC 2009. Asia Pacific, 345-348
  6. DD Krishna, M Gopikrishna , CK Aanandan, A compact wideband Koch fractal printed slot antenna for WLAN applications, Proceedings of the Fifth IASTED International Conference 616 (056), 5
  7. M Gopikrishna , DD Krishna, CK Aanandan, A semi-elliptic slot antenna for Ultra Wide Band systems, Proceedings of the Fifth IASTED International Conference 616 (055), 9
  8. M Gopikrishna , DD Krishna, CK Aanandan, Band notched semi-elliptic slot antenna for UWB systems, Microwave Conference, EuMC 2008. 38th European, 889-892
  9. DD Krishna, M Gopikrishna , CK Aanandan, A CPW-fed triple band monopole antenna for WiMAX/WLAN applications, Microwave Conference, 2008. EuMC 2008. 38th European, 897-900
  10. Deepti Das Krishna, M.Gopikrishna , C.K.Aanandan, P.Mohanan and K. Vasudevan, Square Patch Antenna with a Bow-Tie Slot for Dual Port Operation, International Conference on Microwaves, Antenna, Propagation and Remote Sensing (ICMARS) , 14-18, 2006
Publications in National Conferences
  1. M. Gopikrishna , Deepti Das, Krishna, C. K. Aanandan, A study on the radiation characteristics of UWB rectangular strip monopole antenna, Proceedings on National Symposium on Antennas and Propagation (APSYM 2012),
  2. M.Gopikrishna , Deepti Das, Krishna, Anupam, R.Chandran and C.K.Aanandan, 5GHz WLAN band notched square monopole antenna for UWB systems, Proceedings on National Symposium on Antennas and Propagation (APSYM 2006)
  3. Deepti Das Krishna, M. Gopikrishna , C. K. Aanandan, P.Mohanan, and K. Vasudevan, Electronically Switchable Compact Microstrip Antenna with Triangular Slots for Dual port operation, Proceedings on National Symposium on Antennas and Propagation (APSYM 2006)
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