The Japanese Ministry of Internal Affairs and Communications (MIC) issued Ordinance No. 87. According to the new update, the following documents have been partly revised:
Radio Law Enforcement Regulations
Radio Equipment Regulations
Technical Regulations Conformity Certification of Specified Radio Equipment
The revision was made with regard to UWB wireless systems for outdoor use and radar systems transmitting short- wavelength electromagnetic wave signals (mmWave radars). MIC extends the use of UWB technologies on 7.25-9 GHz frequency bands.
Additionally, MIC informs that UWB devices should have the following:
Average antenna power of -41.3 dBm/MHz or less
Peak antenna power of 0 dBm/50 MHz or less
Tolerance of occupied frequency bandwidth should be 1.75 GHz
Frequency bandwidth for radiant power 10 dB lower than maximum radiant power: 450 MHz or higher
The design of housing should prevent easy opening
The document revised technical conditions requirements to the mmWave radars operating on 60 GHz band.
Frequency allocation 57 GHz ~ 64 GHz
Antenna power should be 12 dBm or less
Equivalent isotropic radiated power should be 17 dBm or less
Pulse amplitude modulation type