That's an ISM frequency (Industrial Scientific Medical) set aside (by the Federal Communications Commission in the USA) for unlicensed equipment to operate on, sometimes with considerable power and/or EM radiation. These bands allows use of the spectrum without interfering with communications or requiring excessively expensive shielding. There are other ISM bands, such as 915 MHz and elsewhere. Orin Laney On Fri, 5 Dec 2008 17:26:15 +0530 (IST) Sumathi Kuppuswamy <sumathi_ramana@xxxxxxxxxxx> writes: > Hi Experts, > If anybody knows, please share the information, why the frequency > 13.56 MHz has been selected for NFC? > thanks > Sumathi > > > > Add more friends to your messenger and enjoy! Go to > http://messenger.yahoo.com/invite/ > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject > field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > List technical documents are available at: > http://www.si-list.net > > List archives are viewable at: > //www.freelists.org/archives/si-list > or at our remote archives: > http://groups.yahoo.com/group/si-list/messages > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > > ____________________________________________________________ Click here to find experienced pros to help with your home improvement project. http://thirdpartyoffers.juno.com/TGL2141/fc/PnY6rw2eRIjGYWxF1rNv4EF5jo4Wz64hXNGn4WK8XL91eqDoRUDin/ ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu