Postgraduate student (PhD)
Jonathan is studying planar monopole antennas for broadband mobile applications.  He has been studying part-time since September 2001 while also working as a Technology Analyst for ComReg.

Areas of interest
Broadband mobile antennas, Antenna modelling, Ultrawideband radio

Publications

Evans, J.A., Ammann, M.J., “A dual-frequency stacked microstrip patch antenna for GPS applications”. Proc.  ISSC99, NUI Galway, Ireland, pp. 381-384.

Evans, J.A., Ammann, M.J., “Planar Trapezoidal and Pentagonal Monopoles with Impedance Bandwidths in Excess of 10:  Dig.1999 IEEE AP-S International Symposium, Orlando, FL., USA,

Evans, J.A., Ammann, M.J., and Doyle, L.E., “A Wideband Antenna for Reconfigurable Multiband Radio Applications’, ISSC2002, Cork, 2002, pp. 157-160

Evans, J.A. and Ammann, M.J., “Planar monopole design considerations based on TLM simulation of current density”, Microw. Opt. Techn. Lett , 2003, 36, (1), pp. 40-42

Ammann, M. J., Evans J. A and Wu, Z. “A Novel Hybrid Inverted-L Antenna with Wide Bandwidth”, 12th IEE International Conference on Antennas & Propagation, Vol (2) pp. 720-722, 2003.

Evans, J.A. and Ammann, M.J., “Planar Monopole Antennas for Broadband Mobile Applications”, IEI/IEEE Irish Telecommunications Systems Research Symposium, 2003