1. Square planar monopole antennas, IEE NCAP, York, UK, 1999, pp. 37-40.
2. and ? A Disk Monopole Antenna With 1:8 Impedance Bandwidth And Omnidirectional Radiation Pattern,? ISAP '92, Sapporo, Japan, 1992, pp. 1145-1148.
3. Wide-band planar monopole antennas
4. Annular planar monopole antennas