ARIB STD-T107

ARIB STD-T107 defines the technical requirements for RFID systems operating in the 920 MHz UHF band in Japan. It applies to object identification devices classified as Specified Low Power Radio Stations under the Radio Law.

Scope and Application

Used for:

• Logistics and supply chain tracking

• Warehouse and inventory systems

• Asset management and industrial RFID applications

Frequency and Operation

• Band: 916.7–923.5 MHz.

• Interference mitigation: ARIB STD-T107 does not prescribe a specific modulation or transmission method. It instead specifies carrier sensing, transmission and pause timing, and a channel-assignment plan for coexistence with other 920 MHz services.

• Below 922.3 MHz: transmissions are limited to 4 seconds per burst and followed by a pause of at least 50 ms. Before transmitting, equipment performs carrier sensing for at least 5 + (R × 0.5) ms, where R is a random integer from 0 to 10. The threshold is −74 dBm, or −64 dBm for equipment with antenna power below 10 mW.

• At or above 922.3 MHz: STD-T107 refers to the transmission-control and carrier-sense requirements of ARIB STD-T108 Part II.

Power Limits

• Antenna power: up to 250 mW, with a tolerance of +20%/−80%.

• Antenna gain: up to 3 dBi. Higher gain may compensate for the difference provided that the resulting EIRP remains below 27 dBm.

• Sealed-enclosure provision: equipment in a case that cannot be opened easily may use antenna power up to 500 mW, provided that EIRP remains below 27 dBm.

“Fixed” and “portable” describe how an interrogator is operated; they are not separate device classes with different power or duty-cycle limits.

Certification and Labeling

• Certification by a Registered Certification Body (RCB) is required

• Devices must display the Giteki mark with certification number

• Compliance involves both ARIB STD-T107 and relevant provisions of the Japanese Radio Law

For support with testing and approval, see our → MIC Certification Services.

Note
A comprehensive overview of device categories, certification process, and Giteki marking can be found in the guide → MIC Requirements – Overview.