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, Apr., 2002 [Online]. Available: http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-02-48A1.pdf
2. Electronic Communications Committee: ECC Decision‘Constanta on the harmonized conditions of devices using Ultra-Wideband (UWB) technology in bands below 10.6 Ghz’, ECC/DEC/(06)04, Jul., 2007 [Online]. Available: http://www.ero.dk/documentation/docs/doc98/official/pdf/ECCDEC0604.pdf
3. Planar half-disk antenna structures for ultra-wideband communications
4. A planar triangular monopole antenna for UWB communication