ANNEX 9: INDUCTIVE APPLICATIONS

Scope of annex
This annex covers frequency bands and regulatory as well as informative parameters recommended for inductive applications including for example: - car immobilisers, - radio frequency identification (RFID) applications including for example automatic article identification, asset tracking, alarm systems, waste management, personal identification, access control, proximity sensors, anti-theft systems, location systems, NFC applications e.g. used for data transfer to handheld devices, anti-theft systems including RF anti-theft induction systems (e.g. EAS), - wireless control systems, - animal identification, - cable detection, - wireless voice links, - automatic road tolling. It should be noted that other types of anti-theft systems can be operated in accordance with other relevant annexes.

Frequency Band Power / Magnetic Field Spectrum access and mitigation requirements Modulation / maximum occupied bandwidth ECC/ERC Deliverable Notes
a1 9kHz  -  90kHz
72 dBµA/m at 10m - The limit is reduced according to Table 9bis No requirement Not specified In case of external antennas only loop coil antennas may be employed. Field strength level descending 3 dB/oct at 30 kHz
a2 90kHz  -  119kHz
42 dBµA/m at 10m No requirement Not specified In case of external antennas only loop coil antennas may be employed
a3 119kHz  -  135kHz
66 dBµA/m at 10m - The limit is reduced according to Table 9bis No requirement See note 1 In case of external antennas only loop coil antennas may be employed. Field strength level descending 3 dB/oct at 119 kHz
b 135kHz  -  140kHz
42 dBµA/m at 10m No requirement Not specified In case of external antennas only loop coil antennas may be employed
c 140kHz  -  148.5kHz
37.7 dBµA/m at 10m No requirement Not specified In case of external antennas only loop coil antennas may be employed
k1 148.5kHz  -  5000kHz
-15 dBµA/m at 10 m No requirement Not specified In case of external antennas only loop coil antennas may be employed. The maximum field strength is specified in a bandwidth of 10 kHz.The maximum allowed total field strength is -5 dBµA/m at 10 m for systems operating at bandwidths larger than 10 kHz whilst keeping the density limit (-15 dBµA/m in a bandwidth of 10 kHz)
d 400kHz  -  600kHz
-8 dBµA/m at 10 m No requirement Not specified For RFID only. In case of external antennas only loop coil antennas may be employed. The maximum field strength is specified in a bandwidth of 10 kHz. The maximum allowed total field strength is -5dBµA/m at 10 m for systems operating at bandwidths larger than 10 kHz measured at the centre frequency whilst keeping the density limit (-8dBµA/m in a bandwidth of 10 kHz.) These systems should operate with a minimum operating bandwidth of 30 kHz
e 3155kHz  -  3400kHz
13.5 dBµA/m at 10m No requirement Not specified In case of external antennas only loop coil antennas may be employed
k2 5000kHz  -  30MHz
-20 dBµA/m at 10 m No requirement Not specified In case of external antennas only loop coil antennas may be employed. The maximum field strength is specified in a bandwidth of 10 kHz. The maximum allowed total field strength is -5 dBµA/m at 10 m for systems operating at bandwidths larger than 10 kHz whilst keeping the density limit (-20 dBµA/m in a bandwidth of 10 kHz)
f 6765kHz  -  6795kHz
42 dBµA/m at 10m No requirement Not specified The frequency band is also identified in Annex 1
g 7400kHz  -  8800kHz
9 dBµA/m at 10m No requirement Not specified
h 10200kHz  -  11000kHz
9 dBµA/m at 10m No requirement Not specified
j1 13553kHz  -  13567kHz
60 dBµA/m at 10m No requirement See note 2 ECC Report 208 For RFID only
j 13553kHz  -  13567kHz
42 dBµA/m at 10m No requirement Not specified
i 26957kHz  -  27283kHz
42 dBµA/m at 10m No requirement Not specified The frequency band is also identified in Annex 1


Standard frequency and time signals to be protected

Stations Frequency Protected Bandwidth maximum Field Strength at 10m Location
MSF 60 kHz +/-250Hz 42 dBuA/m United Kingdom
RBU 66.6 kHz +/-750Hz 42 dBµA/m Russian Federation
HBG 75 kHz +/-250Hz 42 dBµA/m Switzerland
DCF77 77.5 kHz +/-250Hz 42 dBµA/m Germany
DCF49 129.1 kHz +/-500Hz 42 dBµA/m Germany

Additional Information

Harmonised Standards
EN 300 330 all sub-bands

Technical parameters also referred to in the harmonised standard
Note 1 - Sub-band a3): RFIDs operating in the frequency sub-band 119-135 kHz shall meet the spectrum mask given in EN 300 330. This will permit a simultaneous use of the various sub-bands within the range 90-148.5 kHz. Note 2 - Sub-bands j), j1): Devices operating in the 13.56 MHz band shall meet the transmission mask and antenna requirements for all combined frequency segments (including the limits in the sub-bands k1) and k2)) as described in harmonised standard EN 300 330. This will permit the simultaneous use of the sub-bands j) or j1) together with the limits of the sub-bands k1) and k2).

Frequency issues
Users should be aware that emissions from inductive applications could cause interference to nearby receivers of other radio services. In case of loop antennas used within bands a1) and a3) integral or dedicated within an area between 0.05 m2 and 0.16 m2, the field strength is reduced by 10 * log (area/0.16 m2); for an antenna area less than 0.05 m2 the field strength is reduced by 10 dB. Particular attention should also be paid to the more stringent protection requirements identified by the ITU for global distress and safety communications frequencies in the same or adjacent bands.