Dr James Kelly
Biography
I am a Lecturer (Assistant Professor) in Microwave Antennas within the Department of Electrical and Electronic Engineering and a member of the Institute for Communication Systems (ICS) at the University of Surrey. I joined the University of Surrey in October 2013. Before this I was a Lecturer at Anglia Ruskin University in Cambridge, England. From 2007 to 2012 I worked as a research fellow/associate at Loughborough University, as well as the Universities of Birmingham, Durham, and Sheffield.
I have approximately 2.5 years of industry experience. From 1999 to 2000, I worked for the International Rail Vehicle Consultancy, Interfleet Technology. During 2001 and 2012, respectively I worked within the Rolls-Royce Strategic Research Centre and at Airbus Defence and Space Ltd (then EADS Astrium).
I received the Master's degree in electronic and electrical engineering (2002) and the Ph.D. degree in microwave filters (2007) from Loughborough University, Leicestershire, England.
I have published over 80 academic papers in peer reviewed international journals and conference proceedings. In 2009 I delivered the key note speech at an IET seminar in London. The topic of the seminar was “Adaptable and tunable antenna technology for handsets and mobile computing products”. I also co-chaired a session on adaptive antennas for software defined radio during the 2009 IEEE International Symposium on Antennas and Propagation, in Toronto, Canada.
I am a member of the Institution of Engineering and Technology (IET), the Institute of Electrical and Electronics Engineers (IEEE), and the IEEE Industrial Electronics Society. I frequently act as a referee for various international journal publications, including the IEEE Transactions on Antennas and Propagation, the IEEE Antennas and Wireless Propagation Letters, and the IET Microwaves, Antennas & Propagation.
Areas of specialism
Microwave Antennas
University roles and responsibilities
- Additional Learning Support (ALS) Tutor for Electronic Engineering
Research
Research interests
My main research focus is reconfigurable microwave and millimeter wave antennas. Other research interests: small antennas, handset antennas, millimeter wave antennas, ultra-wideband antennas, body-worn antennas, reconfigurable microwave filters, metamaterials.
Research projects
My teaching
Antennas and Propagation (EEEM006)
Laboratories, Design & Professional Studies II (EEE1028)
Laboratories, Design & Professional Studies III (EEE2036)
My publications
Publications
prototype of an innovative mechanical beam steering circular
patch antenna for 5G indoor cellular access networks with sub6
GHz operation. The beam steering is achieved using 18 screws
installed around the circular patch radiator, working as a
reflector by proper managing the screws position and height.
The new antenna can steer its main beam over 360º in azimuth
plane and from -30º to 30º in the elevation plane with gain up to
8.01 dBi at 4.6 GHz.
device that can be reconfigured to behave either as a filter or an
antenna. The device is based around a single resonant element,
referred to as a building block element that is connected to 4
ports. The resonant element is a microstrip square patch
working in the 2.45 GHz unlicensed Industrial Scientific and
Medical (ISM) band used for IEEE 802.11 WiFi. The proposed
building block is simple in its design and construction. The paper
also presents devices composed of three building blocks, which
can realize more complex filtering and antenna mode
performance. In addition, PIN diodes have also been
incorporated into the devices in order to facilitate electronic
control. Measured results, pertaining to fabricated prototypes,
show that filter and antenna operation can be achieved, in the
same device at a frequency of around 2.45 GHz with acceptable
insertion loss and efficiency. In the future, it is anticipated that
this could lead to a new paradigm, namely a device that is
analogous to a field programmable gate array (FPGA) operating
in the microwave frequency regime.
for a high gain millimeter wave beam steerable antenna that
supports continuous steering over a 360° scan range and
promises to yield extremely low power losses. The concept does
not require phase shifters which suffer from high insertion
losses at millimeter wave frequencies or mechanical movement,
in the conventional sense, which has the disadvantages of poor
reliability and slow response times due to high inertia.
are investigated in this thesis. The millimetre wave frequency spectrum
has recently attracted large attention from researchers and the industry of wireless communications.
Millimetre wave frequencies is considered to be the frequency spectrum
between 30 GHz and 300 GHz. However, the industry considers the spectrum above 10
GHz as millimetre wave, due to the fact that it shows similar propagation characteristics
with the spectrum above 30 GHz. The aforementioned spectrum of frequencies
offers a lot of advantages compared to lower frequency spectrum, due to the fact that
it offers large and mostly unexploited bandwidths. The need for very high data rates,
in future wireless communications, increases the need for bandwidth. Millimetre wave
frequencies can be used to fulfill future bandwidth demands.
Although millimeter wave frequencies offer several advantages and good potential for
future wireless communications, they also impose several challenges. This thesis discusses
the need for highly directive and beam reconfigurable antennas for such high
frequencies. It also discusses how an antenna design can benefit from being circularly
polarised for several wireless communication applications and how antennas for future
wireless communications must be able to reconfigure several parameters, without compromising
the performance, cost and size, giving the
exibility to a wireless terminal
to operate in several different modes.
This thesis proposes novel reconfigurable antennas for portable devices, which can be
used at millimetre wave frequencies, and which offer high gain, wide steering range, low
scan loss and multi-parameter reconfigurability; essential characteristics that antennas
designed for future wireless communications should offer.
designing and fabricating a set of 28 GHz 8-element beam steerable antennas. Within the feed, a
Taylor n-bar amplitude taper is implemented using unequal power dividers. At boresight, the taper
reduced the sidelobe level by 2.84 dB to -15.2 dB. Beam steering from 0° ? 48° is achieved using
meanders. An empirical formula for the meander widths is proposed, enabling independent control of
amplitude and phase. Empirical formulae for the initial parameters of the unequal dividers are also
proposed. The wide transmission lines in this feed network are compatible with low-cost PCB
fabrication techniques.
Additional publications
Journal Papers
[1] James R. Kelly, Titos Kokkinos, and Alexandros P. Feresidis, “Analysis and design of sub-wavelength resonant cavity type 2-D leaky-wave antennas,” IEEE Trans. Antennas and Propag., vol. 56, no. 9, pp. 2817-25, Sept. 2008.
[2] James R. Kelly and Rob D. Seager, “Lumped element equivalent circuit for the cymbal resonator bandpass filter,” Microw. and Optical Tech. Lett., vol. 50, no. 9, pp. 2381–4, Jun. 2008.
[3] James R. Kelly and Rob D. Seager, “Approximating the Eigenvalues of Planar Isosceles Triangular Patch Resonators using Galerkin’s Method,” Microw. and Optical Tech. Lett., vol. 51, no. 2, pp. 306 – 11, Dec. 2008.
[4] James R. Kelly and Rob D. Seager, “A Compact Triangular Patch Bandpass Filter,” Microw. and Optical Tech. Lett., vol. 51, no. 2, pp. 566-70, Dec. 2008.
[5] James R. Kelly and Rob D. Seager, “Novel Metallodielectric Electromagnetic Bandgap Structure,” Microw. and Optical Tech. Lett., vol. 51, no. 2, pp. 311–5, Dec. 2008.
[6] James R. Kelly, and Alexandros P. Feresidis, “Array antenna with increased element separation based on a Fabry-Perot resonant cavity with AMC Walls,” IEEE Trans. Antennas and Propag., vol. 57, no. 3, pp. 682-7, March 2009.
[7] F. Ghanem, P. Hall, and J. Kelly, “A two-port frequency reconfigurable antenna for cognitive radios” IET Electron. Lett., vol. 45, no. 11, pp. 534-6, May 21, 2009.
[8] Z. H. Hu, C. T. P. Song, J. Kelly, P. S. Hall, and P. Gardner, “Wide tunable dual-band reconfigurable antenna,” IET Electron. Lett., vol. 45, no. 22, pp.1109-10, Oct. 22, 2009.
[9] J.R. Kelly, P.S. Hall, P. Gardner, and F. Ghanem, “Integrated narrow/band-notched UWB antenna,” IET Electron. Lett., vol. 46, no. 12, pp. 814- 16, Jun. 2010.
10] Z.P. Wang, J. Kelly, P.S. Hall, “Reconfigurable bandstop filter with wide tuning range,” IET Electron. Lett., vol. 46, no. 11, pp. 771-2, May 2010.
[11] Z.H. Hu, P.S. Hall, J.R. Kelly and P. Gardner, “Wideband Conical Monopole Antenna with Frequency Band Notched Behaviour,” IET Electron. Lett., vol. 46, no. 23, pp. 1542-3, Nov. 2010.
[12] J.R. Kelly, and P.S. Hall, “Integrated Wide-Narrow Band Antenna for Switched Operation,” Microw. and Optical Tech. Lett., vol. 52, no. 8, pp. 1705–7, Aug. 2010.
13] J.R. Kelly, PS Hall, “Reconfigurable ultra‐wideband slot antenna,” Microwave and Optical Technology Letters vol. 52, no. 9, pp. 1988-90, Jun. 2010.
[14] Z.H. Hu, P.S. Hall, J.R. Kelly, and P. Gardner, “Novel UWB Pyramidal Monopole Antenna with Wide Tunable Band Notched Behaviour” IET Electron. Lett., vol. 46, no. 24, pp. 1588-90, 2010.
[15] J.R. Kelly, P.S. Hall, P. Gardner, “Ultra-Wideband Antenna with On/Off Band-Notch Control” Microw. and Optical Tech. Lett., vol. 52, no. 12, pp. 2743–46, Sept. 2010.
[16] A.L. Borja, J.R. Kelly, Q. Liu, P.S. Hall, and Z.H.S. Hu, “Dipole Antenna with Left-Handed Loading Operating at a Zero Order Mode,” Progress In Electromag. Research C, vol. 19, pp. 85-92, 2011.
[17] James R. Kelly, Peter S. Hall, Peter Gardner, “Band-Notched Ultra-Wideband Antenna Incorporating a Microstrip Open-Loop Resonator,” IEEE Trans. Antennas and Propag., vol. 59, no. 8, pp. 3045-8, 10 May 2011.
[18] Elham Ebrahimi, James R. Kelly, and Peter S. Hall, “Integrated Wide-Narrowband Antenna for Multi-Standard Radio,” IEEE Trans. Antennas and Propag., vol. 59, no. 7, pp. 2628-35, 2011.
[19] ZH Hu, PS Hall, JR Kelly, P Gardner, “Improved band‐notched wideband conical monopole antenna,” Microwave and Optical Technology Letters, vol. 53, no. 8, pp. 1825-9, 2011.
[20] J.R. Kelly, P. Song, P.S. Hall, and A.L. Borja, “Reconfigurable 460 MHz to 12 GHz Antenna with Integrated Narrowband Slot” Progress In Electromagnetics Research C, vol. 24, pp. 137-45, 2011.
[21] Z.P. Wang, P.S. Hall, J. Kelly, and P. Gardner, “TEM horn antenna with multi-pole band notch characteristic,” IET Electron. Lett., vol. 47, no. 25, pp.1357–8, 8 Dec. 2011.
[22] Z.H. Hu, J.R. Kelly, P.S. Hall, “Wideband Conical Monopole Antenna with Integrated Stopband Filter” Progress In Electromagnetics Research C, Vol. 27, pp. 223-38, 2012
[23] Alejandro L. Borja, Angel Belenguer, Joaquin Cascon and James R. Kelly, “A Reconfigurable Passive UHF Reader Loop Antenna for Near-Field and Far-Field RFID Applications,” IEEE Antennas and Wireless Propagation Letters, vol. 11, pp. 580–3, 2012.
[24] Zhengpeng Wang, P. S. Hall, James R. Kelly and Peter Gardner, “Microstrip Tunable Bandpass Filter with the Co-linear Resonators,” International Journal of Antennas and Propagation, 2013.
[25] Alejandro Lucas Borja, James R. Kelly, Fuli Zhang, and Eric Lheurette, “Editorial: Metamaterials,” International Journal of Antennas and Propagation, 2 pages, 2013.
[26] ZP Wang, PS Hall, J Kelly, P Gardner, “Coplanar Waveguide Reconfigurable Bandpass Filter Based on A Varactor Loaded Colinear Resonator,” Microw. and Optical Tech. Lett., vol. 55, no. 10, pp. 2389-93, 2013.
[27] Zhengpeng Wang ; Kelly, J.R. ; Hall, P.S. ; Borja, A.L. ; Gardner, P., "Reconfigurable Parallel Coupled Band Notch Resonator With Wide Tuning Range," IEEE Trans. on Industrial Electronics, vol. 61, no. 11, pp. 6316-26, Nov. 2014.
[28] Kelly, J.R.; Borja, A.L., "Hardware block for use in programmable microwave function arrays," IET Electronics Letters, vol. 50, no. 15, pp. 1076-7, July 2014.
[29] Kelly, J.R.; Borja, A.L., "Microwave multi-tool" IET Electron. Lett., vol. 50, no. 15, pp. 1035, 2014.
[30] Idris, I. H., Hamid, M.R., Jamaluddin, M.H., Rahim M. K. A., Kelly, J. R., Majid, H.A., "Single-, Dual- and Triple-band Frequency Reconfigurable Antenna", Radioengineering, vol. 23, no. 3, pp. 805-11, 2014.
[31] I.H. Idris, M.R. Hamid, M.H. Jamaluddin, M.K.A. Rahim, J. Kelly, “Slot dipole antenna with single and dual band tuning characteristic”, IET Electron. Lett., vol. 50, no. 21, pp. 1506–7, Oct. 2014.
[32] J Wei, X Chen, Z Wang, J Kelly, P Zhou, “3-Dimension Burden Surface Imaging System with T-shaped MIMO Radar in the Blast Furnace,” ISIJ International. vol. 55 no. 3, pp. 592-9, 2015.
33] J. D. Wei; X. Z. Chen; J. R. Kelly; Y. Z. Cui, "Blast furnace stockline measurement using radar," Ironmaking & Steelmaking. vol. 42, no. 7, pp. 533-41, Aug, 2015.
[34] Sahar Chagharvand, Mohamad Rijal Hamid, Muhammad Ramlee Kamarudin, James R. Kelly, “Wide-to-narrowband reconfigurable Vivaldi antenna using switched-feed technique,” Telecommunication Systems., pp. 1-7, March 2016.
[35] I. Uchendu and J. R. Kelly, "Survey of beam steering techniques available for millimeter wave applications," Progress In Electromagnetics Research B, vol. 68, pp. 35-54, 2016.
[36] S Chagharvand, MR Hamid, MR Kamarudin, JR Kelly, “Wide and multi-band reconfigurable Vivaldi antenna with slot-line feed,” Telecommunication Systems, pp. 1-7, 2016.
[37] C. Gaojie, P. Xiao, Bing Li, J. Kelly, R. Tafazolli, “Full-Duplex Wireless-Powered Relay in Two Way Cooperative Networks,” IEEE Access., pp. 1548–58, Jan. 2017.
[38] Iyemeh E. Uchendu, James R. Kelly, “Ultrawide isolation bandwidth Compensated Power Divider for UWB applications,” Microw. and Optical Tech. Lett., 22nd Sept. 2017.
[39] Z. P. Wang, P. S. Hall, J. R. Kelly, and P. Gardner, “Wideband Frequency Domain and Space Domain Reconfigurable Circular Antenna Array,” IEEE Trans. Antennas and Propag., vol. 65, no. 10, pp. 5179–89, Oct. 2017.
[40] Marion Allayioti, James Kelly, “Beam and Polarisation Reconfigurable Microstrip Antenna Based on Parasitics,” accepted for publication, Microwave and Optical Technology Letters.
Conference Papers
[1] J. Kelly, A. Chauraya, R. Seager, J. Vardaxoglou, “Metallodielectric electromagnetic Bandgap (MEBG) Lumped Element Equivalent Circuit,” in PREP Poster proceedings, University of Hertfordshire, 2004.
[2] J. Kelly, A. Chauraya, R. Seager, J. Vardaxoglou, “Metallodielectric Electromagnetic Bandgap (MEBG) Lumped Element Equivalent Circuit,” in ARMMS, Milton House Hotel, Oxford, 2004.
[3] A. Chauraya, J. Kelly, R. Seager, J. Vardaxoglou, “Frequency Switchable Microstrip Filter for Microwave Frequencies,” in European Microwave Conference, Paris, France, 2006.
[4] J. Kelly, T. Kokkinos, and A. P. Feresidis, “Modelling and Design of Sub-wavelength Metamaterial Resonant Cavity Antennas,” Metamaterials, 2007.
[5] J.R. Kelly, G. Passalacqua, A. P. Feresidis, F. Capolino, M. Albani, Y. C. Vardaxoglou “Dual-Band Leaky Wave Antenna Design,” European Conference on Antennas and Propagation, 2007.
[6] J. Kelly, G. Passalacqua, A. P. Feresidis, F. Capolino, M. Albani, Y. C. Vardaxoglou, “Simulations and Measurements of Dual-Band 2-D Periodic Leaky Wave Antenna,” in Loughborough Antennas and Propagation Conference, Loughborough, UK, 2007.
[7] J. Kelly, and R. Seager, “Slit-Slot Loaded Parallel Coupled-Line Filter,” in Loughborough Antennas and Propagation Conference, Loughborough, UK, 2007.
[8] A. Chauraya, J. Kelly, G. K. Palikaras , C. B. Mulenga, J. A. Flint, A. P. Feresidis and J. C. Vardaxoglou, G. Passalacqua, F. Capolino, and M. Albani, “Planar and Cylindrical Metamaterial Structures for Antenna Applications,” in URSI 2007.
[9] J.R. Kelly, A. P. Feresidis, “Low-Profile High-Gain Sub-Wavelength Resonant Cavity Antennas For WiMax Applications,” in European Conference on Antennas and Propagation, 2007.
[10] J.R. Kelly, G. Passalacqua, A.P. Feresidis, F. Capolino, M. Albani, Y.C. Vardaxoglou, “Dual Frequency Leaky-Wave Antenna Analysis and Design,” in European Conference on Antennas and Propagation (EuCAP), 2007.
[11] P. Gardner, M.R. Hamid, P.S. Hall, J. Kelly, F. Ghanem and E. Ebrahimi, “Reconfigurable Antennas For Cognitive Radio: Requirements And Potential Design Approaches”, in IET Seminar on Wideband, multi-band antennas and arrays for defence or civil applications, London, UK, 2008.
[12] James Kelly and Alexandros Feresidis, “Thin 2-D leaky-wave antenna formed by a double layer periodic array,” in Loughborough Antennas and Propagation Conference, Loughborough, UK, 2008.
[13] J. R. Kelly, E. Ebrahimi, P. S. Hall, P. Gardner, and F. Ghanem, “Combined Wideband and Narrowband Antennas for Cognitive Radio Applications”, in IET Seminar on Cognitive Radio and Software Defined Radio: Technologies and Techniques, London, UK, 2008.
[14] P.S. Hall, P. Gardner, J. Kelly, E. Ebrahimi, M.R. Hamid, and F. Ghanem, “Antenna Challenges in Cognitive Radio,” in ISAP 08, Taipei, Taiwan, 2008.
[15] P.S. Hall, P. Gardner, J. Kelly, E. Ebrahimi, M.R. Hamid, F. Ghanem, F.J. Herraiz-Martinez, D. Segovia-Vargas, “Reconfigurable antenna challenges for future radio systems” in European Conference on Antennas and Propagation, Berlin, 2009.
[16] J. Kelly, P.S. Hall, P. Gardner, “Planar Band-Notched UWB Antenna,” in European Conference on Antennas and Propagation, Berlin, 2009.
[17] J. Kelly, P.S. Hall, P. Gardner, “Integrated Wide-Narrow Band Antenna for Switched Operation,” in European Conference on Antennas and Propagation, Berlin, 2009.
[18] E. Ebrahimi, J. Kelly, P. Hall, “Integrated Wide-Narrowband Antenna for Multi-Standard Radio Systems,” in URSI Festival of Radio Science, Birmingham, UK, 2009.
[19] E. Ebrahimi, J. Kelly, and P.S. Hall, “A Reconfigurable Narrowband Antenna Integrated with Wideband Monopole for Cognitive Radio Applications,” in IEEE International Symposium on Antennas and Propagation, Charleston, SC, USA, 2009.
[20] J.R. Kelly, P.S. Hall, and P. Song, “A Reconfigurable Wideband Handset Antenna Operating from 460MHz to 12GHz,” in IEEE International Symposium on Antennas and Propagation, 2009.
[21] J.R. Kelly, and P.S. Hall, “Reconfigurable Slot Antenna for Cognitive Radio Applications,” in IEEE International Symposium on Antennas and Propagation, Charleston, SC, USA, 2009.
[22] P.S. Hall, P. Gardner, Z. Hu, P. Song, J. Kelly, and M.R. Hamid, “Reconfigurable antennas for wideband wireless systems” in IET seminar on adaptable and tunable antenna technology for handsets and mobile computing products, London, UK, 2009.
[23] C.T.P. Song, Z.H. Hu, J. Kelly, P.S. Hall, and P. Gardner, “Wide Tunable Dual-Band Reconfigurable Antenna for Future Wireless Devices,” in Loughborough Antennas and Prop. Conference, 2009.
[24] Z. H. HU, C. T. P. Song, J. Kelly, P. S. Hall, and P. Gardner, “A Novel Reconfigurable UWB Chassis-Antenna for Future Mobile Terminals,” in URSI Festival of Radio Science, Birmingham, UK, 2009.
[25] J.R. Kelly, K. L. Ford, and R. Langley, “A New Approach for On-Body and Off-Body Communications,” in Loughborough Antennas & Propagation Conference, 2010.
[26] Z.H. Hu, J. Kelly, C.T.P. Song, P.S. Hall, and P. Gardner, “Novel Wide Tunable Dual-Band Reconfigurable Chassis-Antenna for Future Mobile Terminals,” in European Conference on Antennas and Propagation, Barcelona, 2010.
[27] Z.H. Hu, J. Kelly, C.T.P. Song, P.S. Hall, and P. Gardner, “Equivalent Circuit Modeling of Chassis-Antenna with Two Coupling Elements,” in IEEE International Symposium on Antennas and Propagation, Toronto, Ontario, Canada, 2010.
[28] Z.H. Hu, C.T.P. Song, J. Kelly, P.S. Hall, and P. Gardner, “Novel Reconfigurable Dual-Port UWB Chassis-Antenna,” in IEEE International Symposium on Antennas and Propagation, 2010.
[29] Z. P. Wang, P. S. Hall, J. Kelly, and P. Gardner, “TEM Horn Circular Array for Wide Band Pattern Notch Reconfigurable Antenna System,” in Loughborough Antennas & Propagation Conference, Loughborough, UK, 2010.
[30] Z. P. Wang, J. Kelly, and P. S. Hall, “Wideband Reconfigurable Bandstop Filter for Future Wireless Communication,” in Loughborough Antennas & Propagation Conference, 2010.
[31] J. Holopainen, R. Valkonen, O. Kivekäs, J. Ilvonen, L. Martínez, P. Vainikainen, J. R. Kelly, P. S. Hall, “Equivalent Circuit Model-Based Approach on the User Body Effect of a Mobile Terminal Antenna,” in Loughborough Antennas & Propagation Conference, 2010.
[32] Z. H. Hu, P. S. Hall, J.R. Kelly, and P. Gardner, “Novel wideband pyramidal monopole antenna with wide tunable frequency band-notch,” in European Conference on Antennas and Propagation, Rome, Italy, 2011.
[33] Z. H. Hu, P. S. Hall, J.R. Kelly, and P. Gardner, “Wideband Omni Conical Monopole Antenna with High Q Band-Notched Behaviour,” in International Workshop on Antenna Technology (iWAT): Small Antennas, Innovative Structures and Materials, Lisbon, Portugal, 2011.
[34] J. Kelly, L. Ford, R. Langley, “Slotline structure for on/off-body communications at 2.45 GHz,” in European Conference on Antennas and Propagation, 2011.
[35] James R. Kelly, Mikolaj Chwalisz, Sana Salous, “Cognitive Radio: Sensing Engine Sensitivity,” in EURO-COST, Malaga, Spain, 2013.
[36] James K. Kelly, Sana Salous, Mikolaj Chwalisz, “On the Sensitivity of Candidate Cognitive Radio Sensing Engines,” in 1st URSI Atlantic Radio Science Conference, ExpoMeloneras Convention Centre, Gran Canaria, 2015
[37] James R. Kelly, Alejandro Borja, “Reconfigurable Microwave Circuit Based on a Single Triangular Microstrip Patch,” in IEEE AP-S Symposium on Antennas and Propagation and URSI CNC/USNC Joint Meeting, Vancouver, Canada, 2015.
[38] James R. Kelly, Alejandro Borja, “Reconfigurable Microwave Circuit Based on Three Triangular Microstrip Patches,” in IEEE AP-S Symposium on Antennas and Propagation and URSI CNC/USNC Joint Meeting, Vancouver, Canada, 2015.
[39] James R. Kelly, “PIFA with Reconfigurable Frequency Bandwidth,” in IEEE AP-S Symposium on Antennas and Propagation and URSI CNC/USNC Joint Meeting, Vancouver, Canada, 2015.
[40] Iyemeh Uchendu and James Kelly, “Combined Parasitic and Phased Array Reconfigurable Antenna,” in Loughborough Antennas and Propagation Conference, Loughborough, UK, 2015.
[41] Marion Allayioti, James R. Kelly, “Side lobe level reduction for beam steerable antenna design,” in European Conference on Antennas and Propagation, Davos, Switzerland, 2016.
[42] Marion Allayioti, James R. Kelly, “Multiple Parameter Reconfigurable Patch Antenna,” in IEEE AP-S Symposium on Antennas and Propagation and USNC-URSI Radio Science, San Diego, California, USA, 2017.
[43] Khaled Alqurashi, James R. Kelly, “Continuously Tunable Frequency Reconfigurable Liquid Metal Patch Antenna,” in IEEE AP-S Symposium on Antennas and Propagation and USNC-URSI Radio Science, San Diego, California, USA, 2017.
[44] H.R.D. Filgueiras, I. F. da Costa, Arismar Cerqueira S. Jr., R. A. Santos, D. H. Spadoti, James R. Kelly, “Mechanically Reconfigurable Slotted-Waveguide Antenna Array for 5G Networks,” in IEEE International Microwave and Optoelectronics Conference (IMOC), Brazil, 2017.
[45] I.F. da Costa, H.R.D. Filgueiras, J.R. Kelly, Arismar Cerqueira S. Jr., and Pei Xiao, “Mechanical Beam Steering Circular Patch Antenna,” accepted for publication in European Conference on Antennas and Propagation (EuCAP), London, England, 2018.
Book Chapters
[1] Lucas Borja, Alejandro; Kelly, James; Belenguer Martinez, Angel; Cascon Lopez, Joaquin; Boria , Vicente E.: Book title: Metamaterial, Chapter title: “Compact Coplanar Waveguide Metamaterial-Inspired Lines and its Use in Highly Selective and Tunable Bandpass Filters”, Intech, ISBN 979-953-307-563-0.
Patents
[1] “Reconfigurable Antenna” UK application reference GB0918477.1 filed 21st October 2009, published as international application WO2011/048357 and as EP2491613. Patent application still pending in European and US patent offices. Inventors: Peter Song, James Kelly, Peter Hall, Sampson Hu.
[2] “Energy Harvesting Utilizing Self-interface in Wireless Communication Systems “UK application reference GB1419668.7 filed 4th November 2014. Inventors: Bing Li, James Kelly, Gaojie Chen, Pei Xiao, Rahim Tafazolli