2Weigand, S. ; Huff, G. H. ; Pan, K. H. ; Bernhard, I. T. Analysis and design of broad--band single--layer rectangular U-slot mlcrostirp patch antennas [J] . Antennas and Propagation, 2003, 51 (3): 457-468.
3J S Kuo, K L Wong, A Dual--frequency L--shaped Patch Antenna [J]. Microwave and Optical Technology Letters, 2000, 27 (3): 177 - 179.
4J S Kuo, K L Wong, A Dual--frequency Operation of a Planar Inverted--L Antenna with Tapered Patch Width [J]. Microwave and Optical Technology Letters, 2001, 28 (2) :126 - 127.
6Autol D Labs homepage, http://www. autoidlabs. org/.
7International Telecommunication Union, Internet Reports 2005 : The Internet of things[ R]. Geneva: ITU ,2005.
8Commission of the European communities, COM (2009) 278 final. Internet of things-an action plan for Europe, Brussels [EB/OL]. ( 2009-06-18 ) [ 2010-05-12 ]. http://ee. europa. eu/information _ society/policy/rfid/doeuments/commiot2009. pdf.
10European Research Projects on the Internet of Things (CERP-IoT) Strategic Research Agenda (SRA). Internet of things--strategic research roadmap [EB/OL ] (2009-09-15) [ 2010-05-12 ]. http ://ec. europa. eu/information society/policy/rfid/documents/in_cerp. pdf.
