The Outline of Proposed Amendment to Ministerial Ordinance 
 
１ Item 
Partial revision of Regulations for Enforcement of the Radio Law etc 
 
２ Amendment to ministerial ordinance 
 Regulations for Enforcement of the Radio Law 
    Regulations for Radio Equipment  
    Concerning Technical Regulations Conformity Certification of Specified Radio 
Equipment 
 
３ Reasons for amendment 
Recently, introduction of new wireless systems using broadband milliwave radars are 
expected. For example, motion sensors by gestures to remotely control mobile devices or 
TVs, biological information sensors that captures slight movement on the human body 
surface to measure heart rate with high accuracy and new radio system that enables 
both of data communication and radio evaluation. Further, considering that components 
of the data communication systems in 57-66GHz has been significantly changed, it has 
been desired to review the technical standards of the housing conditions of low power 
data communications system. 
  Japan will amend the current technical regulations for milliwave rador/sensor system 
based on these new usage needs. 
 
４ Outline of the amendment 
Technical requirements of milliwave radar system  
 
Item  
Name Milliwave radar/sensor system 
Frequency Allocation 57GHz ~ 64GHz 57GHz ~ 66GHz 
Antenna Power 10mW or less（Peak） 250mW or less(Peak or Average)  
Occupied Bandwidth 7GHz 9GHz 
Allowable deviation of Antenna 
Power Max 50%，Min 70% 
Antenna Gain ― 10dBi or more  
Equivalent Isotropic Radiated 
Power 13dBm or less 
 400dBm or less   
Allowable deviation of Frequency depends on Designation 
Frequency ±20ppm or depends on 
Designation Frequency. 
(±500 ppm or depends on 
Designation Frequency in case 
of 10mW or less only.) 
Unwanted Emission Strength Appendix 1 Appendix 2 
Secondary Radiated Emission 
Strength Appendix 3 
Modulation type Frequency Modulated Continuous 
Wave except Frequency 
Modulated Continuous Wave ― 
Housing requirements Both high-frequency portion and the modulation unit shall not be 
capable of being opened easily. Further, in the case where the 
high-frequency portion and the modulation unit are separated, 
oneness of them shall be kept and each of them shall not be capable of 
being opened easily. 
Transmission Time Control Duty 10%, in 33msec cycle  ― 
Crosstalk Preventing Function By identifying the modulation type and other characteristics of the 
received radio wave, the radio equipment should have capacity to 
distinguish between the reflected radio wave that is transmitted by 
the local station and the radio wave that is transmitted by other 
station. 
Others Have a means that terminate the 
transmission of radio wave. Transmitters is required a 
carrier sense function.  
 
  
Appendix 1（Unwanted Emission Strength） 
 
 Limit value (Peak) Remarks 
55.62 GHz or less -30dBm/MHz Spurious 
55.62 GHz - 57GHz -26dBm/MHz Outband 
64 GHz - 67.5GHz -26dBm/MHz Outband 
Over 67.5GHz -30dBm/MHz Spurious 
 
  
Appendix 2（Unwanted Emission Strength） 
 
 Limit value (Peak) Remarks 
55.62 GHz or less -30dBm/MHz Spurious 
55.62 GHz - 57GHz -26dBm/MHz Outband 
66 GHz - 67.5GHz -26dBm/MHz Outband 
Over 67.5GHz -30dBm/MHz Spurious 
 
Appendix 3（Secondary Radiated Emission Strength） 
 
 Limit value (Average) 
 below 1GHz Average power should be 4nW or less in any 
100kHz bandwidth 
1GHz or more Average power should be 20nW or less in any 
1MHz bandwidth.  
 
５ Proposed date of entry into force 
January, 2020