Overview of ARIB Standards (STD-T48)｜Association of Radio Industries and Businesses

Overview of ARIB Standards (STD-T48)

STD Number	ARIB STD-T48
Standard Name	Millimeter-Wave Radar Equipment for Specified Low Power Radio Station
Enactment Date	12.26.1995
General Description	This standard specifies millimeter-wave radar equipment (radar that uses radio waves in a millimeter band for radiolocation service) which is categorized as a Specified Low Power Radio Station designated in Article 6 of the Regulations for Enforcement of the Radio Act.

Ver.	Amendment or Enactment Date	Amendment summary
2.3	10.09.2026	Revisions were made in response to the regulatory revision by the Ministry of Internal Affairs and Communications concerning the antenna power limit for 76 GHz band millimeter-wave radar, which changed the limit from 0.01W or less to 1W or less for equipment with a maximum EIRP of 50 dBm.
2.2	12.03.2015	Change items necessary to conform the legislation of Ministry of Internal Affairs and Communications (Notification No. 217, 2015 (June, 2015): Revision of the tolerance of occupied frequency bandwidth for 76 GHz band Millimeter-Wave Radar from 500 MHz to 1 GHz).
2.1	11.30.2005	Revise definitions, tolerance limits, interim measure for the revision, and measurement method on spurious emission, etc. in accordance with amendment concerning technical criterion on Permissible Values for Spurious Emission, and so on.
2.0	02.02.1999	Change the limit on secondarily radiated emissions.
1.0	12.26.1995	Enactment