1. Federal Communication Commission, First Report and Order, Revision of Part 15 of the Commission's Rules Regarding Ultra-Wideband Transmission Systems, FCC 02-48, April 22, 2002.
2. and Note on antenna design in UWB wireless communication systems, IEEE Conf Ultra Wideband Sys Technol, Reston, VA, 2003, pp 503-507.
3. Wide-band planar monopole antennas
4. Impedance bandwidth of the square planar monopole