Digital Signal Processing Reference
In-Depth Information
Table 5.14 Permitted frequency ranges and field strengths
at a distance of 10m
Frequency range (MHz)
Field strength H @10m
(dBµA/m)
0.009-0.057
42
0.057-0.05975
69
0.05975-0.06025
42
0.06025-0.067
69
0.067-0.119
42
0.119-0.127
69
0.127-0.135
42
0.135-30.000
5
3.155-3.400
13.5 (EAS)
6.765-6.795
42
7.400-8.800
9 (EAS)
13.553-13.567
42
26.957-27.283
42
Table 5.15 Permissible frequency ranges and power levels for
short range devices
Frequency range (MHz)
Power level
6.765-6.975
42 dB µ A/m @ 10m
13.553-13.567
42 dB µ A/m @ 10m
26.957-27.283
42 dB µ A/m @ 10m, 10 mW ERP
40.660-40.700
10mW ERP
433.05-434.79
10mW ERP
2400.0-2483.5
10mW ERP
5725.0-5875.0
25mW ERP
24.000-24.250
100mW ERP
Devices)'). The general allocation covers numerous SRD applications and is not limited
to RFID systems. Only the frequency ranges listed in Table 5.15 may be used for these
applications with the corresponding maximum magnetic field strength or the maximum
radiated power.
5.4
National Licensing Regulations
5.4.1
USA
In the USA, RFID systems must be licensed in accordance with licensing regula-
tion ' FCC Part 15 '. This regulation covers the frequency range from 9 kHz to above
64 GHz and deals with the intentional generation of electromagnetic fields by low and
minimum power transmitters (intentional radiators) plus the unintentional generation of
electromagnetic fields (spurious radiation) by electronic devices such as radio and tele-
vision receivers or computer systems. The category of low power transmitters covers a
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