The O utline of Proposed Amendment to  Ministerial O rdinance  
 
１ Item 
Partial  revision of Regulations for Radio Equipment  etc. 
 
２ Amendment to ministerial ordinance  
Regulations for Radio Equipment  
 
３ Reason s for amendment  
To make improvements  the convenience of wireless LAN  (WLAN)  system , we make technical 
standards of the 320MHz WLAN system  and technical standards of the client to client connection 
at LPI operation to the 6GHz WLAN System . Also, we revise the technical standards of 5.2GHz 
band wireless LAN sy stems in cars.  
 
４ Outline of the amendment  
Technical requirements of radio equipment  
(The following items written in red indicate are points to change. ) 
Item  
Name  Wireless LAN System  (2.4/5.2/5.3/5.6 /6GHz band ) 
Frequency band 2400MHz  to 2483.5MHz  
5150MHz to 5350MHz  
5470MHz to 5730MHz  
5925MHz to 6425MHz  
Communication Systems   Unidirectional, Simplex, Half -Duplex  and Duplex  
Modulation DS-SS, Amplitude Modulation, Phase Modulation, Frequency Modulation, 
Pulse Modulation or these combination, and OFDM  
Max Bit -rate (5150MHz to 5350MHz , 5470MHz to 5730MHz  and 5925MHz to 
6425MHz ) 
・20MHz system : more than 20 Mbps  
・40MHz system : more than 40 Mbps  
・80MHz system : more than 80 Mbps  
・160MHz system : more than 160 M bps 
・320MHz system : more than 320 Mbps  
OBW  (2400 MHz to 2483.5MHz)   
・20MHz system :  26 MHz  
・40MHz syste m : 40 MH z 
(5150MH z to 5350MHz and 5470MHz to 5730MHz)  
・20MHz system : 20 MHz (OFDM), 18 MHz (other modulations)  
・40MHz system : 40 MHz  
・80MHz system : 80 MHz  
・160MHz system  : 160 MHz  
(5925MHz to 6425MHz ) 
・20MHz system : 20 MHz (OFDM)  
・40MHz system : 40 MHz(OFDM)  
・80MHz sys tem : 80 MHz(OFDM)  
・160MHz system  : 160 MHz(OFDM)  
・320MHz system : 320 MHz(OFDM)  
Allowable 
deviation of 
frequency  ・2400MHz to 2483.5MHz ：±50×10-6 
・5150MHz to 5350MHz , 5470MHz to 5730MHz  and 5925MHz to 
6425MHz ：±20×10-6 
Antenna Power  
  
Frequency band  Modula tions  Antenna Power  
2400MHz 
to 
2483.5MHz FH 3 mw/MHz  
DS-SS (excepting FH -DS) 10 mW/MHz  
OFDM  
(excepting FH -OFDM ) 20MHz system  10 mW/MHz  
40MHz system  5 mW/MHz  
other modulations  10 mW  
5150MHz - 
5350MHz 
 DS-SS 10 mW/MHz  
OFDM  20MHz system  10 mW/MHz  
(without 
connecting  ) 
40MHz system  5 mW/MHz  
(without )  
80MHz system  2.5 mW/MHz  
(without )  
160MHz system  1.25 mW/MHz  
other modulations  10 mW  
5470MHz - 
5730MHz DS-SS 10 mW/MHz  
OFDM  20MHz system  10 mW/MHz  
40MHz system  5 mW/MHz  
80MHz syste m 2.5 mW/MHz  
160MHz system  1.25 mW/MHz  
other modulations  10 mW/MHz  
5925MHz - 
6425MHz OFDM  20MHz system  10 mW/MHz  
40MHz system  5 mW/MHz  
80MHz system  2.5 mW/MHz  
160MHz system  1.25 mW/MHz  
320MHz system  0.625mW/MHz  
  
EIRP  
 (unlicensed 5.2/5.3/5.6/6GHz WLAN s ystem)   
Frequency band   EIRP  
5150MHz 
to 
5250MHz 20MHz system  10 mW/MHz   
(installations inside  cars; 2mW/MHz)  
40MHz system  5 mW/MHz  
 (installations inside  cars; 1mW/MHz)  
80MHz system  2.5 mW/MHz   
(installations inside  cars; 0.5mW/MHz)  
5250MHz 
to 
5350MHz 20MHz system  10 mW/MHz  (without TPC support; 5 mW/MHz)  
40MHz system  5 mW/MHz  (without TPC support; 2.5 mW/MHz)  
80MHz system  2.5 mW/MHz  
(without TPC support; 1.25 mW/MHz)  
5470MHz 
to 
5730MHz 20MHz system  50 mW/MHz  
(without TPC support ; 25 mW/MHz)  
40MHz system  25 mW/MHz  
(without TPC support; 12.5 mW/MHz)  
80MHz system  12.5 mW/MHz  
(without TPC support; 6.25 mW/MHz)  
160MHz system  6.25 mW/MHz  
(without TPC support; 3.125  mW/MHz)  
5925MHz 
to 
6425MHz 20MHz system  Low Po wer Indoor (L PI); 10mW/MHz  
Very Low Power ( VLP); 1.25mW/MHz  
40MHz system  LPI; 5mW/MHz  
VLP; 0.625mW/MHz  
80MHz system  LPI ; 2.5mW/MHz  
VLP; 0.3125mW/MHz  
160MHz system  LPI; 1.25mW/MHz  
VLP; 0.15625mW/MHz  
320MHz system  LPI; 0.625mW/MHz  
VLP; 0.078125mW/MHz  
(registered  5.2GHz High- power WLAN system )  
 elevation angle  θ (degree)  Max EIRP (dBW/MHz)  
20MHz system  < 8 -13 
8 to 40  -13 – 0.716(θ - 8) 
40 to 45  -35.9 – 1.22(θ - 40) 
45 < -42 
40MHz system  < 8 -16 
8 to 40  -16 – 0.716(θ - 8) 
40 to 45  -38.9 – 1.22(θ - 40) 
45 < -45 
80MHz system  < 8 -19 
8 to 40  -19 – 0.716(θ- 8) 
40 to 45  -41.9 – 1.22(θ - 40) 
45 < -48 
  
 
Allowable 
deviation of 
Antenna Power  (5150MHz to 5350MHz , 5925MHz to 6425MHz )   -80 to + 20% 
(5470MHz to 5730MHz )   -50 to + 50% 
Spectrum Mask 
(1) OBW is less than 18MHz ：Average powers within the ±  9MHz  regions 
of 20MHz and 40MHz separations  from the 
carrier frequency are respectively 25dB and 
40dB less than the average power of the 
carrier frequency.  
OBW is 18MHz to 20MHz ：Average powers within the ± 10MHz 
regions of 20MHz and 40MHz separations  
from the carrier frequency are respectively 
25dB and 40dB less than the average power of the carrier frequency.  
OBW is 20MHz to 40MHz ：Average powers within the ± 20MHz 
regions of 40MHz and 80MHz separations  
from the carrier frequency are respectively 25dB and 40dB less than the average power 
of the carrier frequency.  
OBW is 40MHz to 80MHz ：Average power within the ± 40MHz region 
of 80MHz and 160MHz separation s from 
the carrier frequency are 25dB and 40dB 
less than the av erage power of the carrier 
frequency.   
OBW is 8 0MHz to 160MHz ：Average power within the ±  80MHz region 
of 160MHz  and 320MHz  separation s from 
the carrier frequency are 25dB and 40dB 
less than the av erage power of the carrier 
frequency.  
OBW is 160MHz to 320MHz ：Average power within the ± 160MHz 
region of 320MHz separation  from the 
carrier frequency are 25dB less than the 
average power of the carrier frequency.  
 
  
Spectrum Mask 
(2) (unlicensed 5.2/5.3GHz WLAN system ) 
OBW  reference 
channel  applied frequency region  Allowable unwanted emission 
level(EIRP)  
≦ 18MHz  5240MHz  ≦ 5142MHz  2.5 μW/MHz  
5142MHz - 5150MHz  15 μW/MHz  
5250MHz - 5251MHz  101-(f-9) mW/MHz  
5251MHz - 5260MHz  10-1-(8/90)(f -11) mW/MHz  
5260MHz - 5266.7MHz  10-1.8-(6/50)(f -20) mW/MHz  
5266.7MHz  ≦ 2.5 μW/MHz  
5260MHz  ≦ 5233.3MHz  2.5μW/MHz  
5233.3MHz -5240MHz  10-1.8-(6/50)(f -20) mW/MHz  
5240MHz - 5249MHz  10-1-(8/90)(f -11) mW/MHz  
5249MHz - 5250MHz  101-(f-9) mW/MHz  
5350MHz  ≦ 2.5 μW/MHz  
18MHz to 
20MHz  5180MHz  ≦ 5142MHz  2.5 μW/MHz  
5142MHz - 5150MHz  15 μW/MHz  
5240MHz  5250MHz – 5250.2MHz  101-(8/3)(f -9.75) mW/MHz  
5250.2MHz - 5251MHz  101-(f-9) mW/MHz  
5251MHz - 5260MHz  10-1-(8/90)(f -11) mW/MHz  
5260MHz - 5266.7MHz  10-1.8-(6/50)(f -20) mW/MHz  
5266.7MHz  ≦ 2.5μW/MHz  
5260MHz  ≦ 5233.3MHz  2.5 W/MHz  
5233.3MHz - 5240MHz  10-1.8-(6/50)(f -20) mW/MHz  
5240MHz - 5249MHz  10-1-(8/90)(f -11) mW/MHz  
5249MHz - 5249.8MHz  101-(f-9) mW/MHz  
5249.8MHz - 5250MHz  101-(8/3)(f -9.75) mW/MHz  
5320MHz  5350MHz  ≦ 2.5 W/MHz  
20MHz to 
40MHz  5190MHz  ≦ 5141.6MHz  2.5μW/MHz  
5141.6MHz - 5150MHz  15μW/MHz  
5230MHz  5250MHz - 5251MHz  10-(f-20)+log(1/2) mW/MHz  
5251MHz - 5270MHz  10-(8/190)(f -21)-1+log(1/2) mW/MHz  
5270MHz - 5278.4MHz  10-(3/50)(f -40)-1.8+log(1/2) mW/MHz  
5278.4MHz ≦ 2.5 μW/MHz  
5270MHz  ≦ 5200MHz  2.5 μW/MHz  
5200MHz - 5221.6MHz  2.5 μW/MHz  
5221.6MHz - 5230MHz  10-(3/50)(f -40)-1.8+log(1/2) mW/MHz  
5230MHz - 5249MHz  10-(8/190)(f -21)-1+log(1/2) mW/MHz  
5249MHz - 5250MHz  10-(f-20)+log(1/2) mW/MHz  
5310MHz  5350MHz - 5358.4MHz  15μW/MHz  
5358.4MHz  ≦ 2.5 μW/MHz  
40MHz to 
80MHz  5210MHz  ≦ 5123.2MHz  2.5 μW/MHz  
5123.2MHz - 5150MHz  15 μW/MHz  
5250MHz - 5251MHz  10-(f-40)+log(1/4) mW/MHz  
5251MHz - 5290MHz  10-(8/390)(f -41)-1+log(1/4) mW/MHz  
5290MHz - 5296.7MHz  10-(3/100)(f -80)-1.8+log(1/4) mW/MHz  
5296.7MHz - 5480MHz  2.5 μW/M Hz 
5290MHz  ≦ 5203.3MHz  2.5 μW/MHz  
5203.3MHz - 5210MHz  10-(3/100)(f -80)-1.8+log(1/4) mW/MHz  
5210MHz - 5249MHz  10-(8/390)(f -41)-1+log(1/4) mW/MHz  
5249MHz - 5250MHz  10-(f-40)+log(1/4) mW/MHz  
5350MHz - 5376.8MHz  15 μW/MHz  
5376.8MHz  ≦ 2.5 μW/MH z 
80MHz to 
160MHz  5250MHz  ≦ 5099.6MHz  2.5 μW/MHz  
5099.6MHz - 5150MHz  15 μW/MHz  
5350MHz - 5400.4MHz  15 μW/MHz  
5400.4MHz  ≦ 2.5 μW/MHz  
' f ' is the separation from the carrier frequency. (unit : MHz)   
(unlicensed 5.6GHz WLAN system ) 
 
(unlicensed 5.2GHz WLAN system installations inside  cars)  
OBW  reference 
channel  applied frequency 
region  Allowable unwanted emission 
level  
(EIRP)  
< 20MHz  5180MHz  ≦ 5142MHz  0.5μW/MHz  
5142MHz - 5150MHz  3μW/MHz  
5240M Hz 5250MHz – 5250.2MHz  0.2x101-(8/3)(f -9.75) mW 
5250.2MHz - 5251MHz  0.2x101-(f-9)mW/MHz  
5251MHz - 5260MHz  0.2x10-1-(8/90)(f -11)mW/MHz  
5260MHz - 5266.7MHz  0.2x10-1.8-(6/50)(f -20)mW/MHz  
5266.7MHz ≦ 0.5μW/MHz  
20MHz to 
40MHz  5190MHz  ≦ 5141.6MHz  0.5μW/MHz  
5141.6MHz - 5150MHz  3μW/MHz  
5230MHz  5250MHz - 5251MHz  0.2x10-(f-20)+log(1/2)mW/MHz  
5251MHz - 5270MHz  0.2x10-(8/190)(f -21)-1+log(1/2)mW/
MHz  
5270MHz - 5278.4MHz  0.2x10-(3/50)(f -40)-1.8+log(1/2)mW/
MHz  
5278.4MHz ≦ 0.5μW/MHz  
40MHz to 
80MH z 5210MHz  ≦ 5123.2MHz  0.5μW/MHz  
5123.2MHz - 5150MHz  3μW/MHz  
5250MHz - 5251MHz  0.2x10-(f-40)+log(1/4)mW/MHz  
5251MHz - 5290MHz  0.2x10-(8/390)(f -41)-1+log(1/4)mW/
MHz  
5290MHz - 5296.7MHz  0.2x10-(3/100)(f -80)-1.8+log(1/4)mW/
MHz  
5296.7MHz ≦ 0.5μW/ MHz  
' f ' is the separation from the carrier frequency. (unit : MHz)  
 
(registered 5.2GHz High- power WLAN system )  
OBW  reference 
channel  applied frequency 
region  Allowable unwanted emission 
level  
(EIRP)  
< 18MHz  5240MHz  ≦ 5142MHz  12.5μW/MHz  
5142MHz - 5150MHz  75μW/MHz  OBW  applied fre quency region  Allowable unwanted emission level(EIRP)  
≦ 20MHz  
(OFDM)  < 5460MHz  2.5 μW/MHz  
5460MHz - 5470MHz  
5730MHz - 5765MHz  12.5 μW/MHz  
5765MHz  < 2.5 μW/MHz  
≦ 20MHz  
(others)  ≦ 5470MHz   12.5 μW/MHz  
5730MHz  ≦ 12.5 μW/MHz  
20MHz to 
40MHz  ≦ 5460MHz  12.5 μW/MHz  
5460MHz - 5470MHz  50 μW/MHz  
5770MHz  ≦ 12.5 μW/MHz  
40MHz to 
80MHz  ≦ 5460MHz  12.5 μW/MHz  
5460MHz  - 5469.5MHz  50 μW/MHz  
5469.5MHz  - 5470MHz  51.2 μW/MHz  
5770MH z ≦ 12.5 μW/MHz  
80MHz to 
160MHz  ≦ 5419.6MHz  12.5 μW/MHz  
5419.6MHz - 5470MHz  50 μW/MHz  
5725MHz ≦ 12.5 μW/MHz   
5250MHz - 5251MHz  101+log(5) -(f-9)mW/MHz  
5251MHz - 5260MHz  10-1+log(5) -(8/90)(f -11)mW/MHz  
5260MHz - 5266.7MHz  10-1.8+log(5) -(6/50)(f -20)mW/MHz  
5266.7MHz ≦ 12.5μW/MHz  
18MHz to 
20MHz  5180MHz  ≦ 5142MHz  12.5μW/MHz  
5142MHz - 5150 MHz  75μW/MHz  
5240MHz  5250MHz – 5250.2MHz  101+log(5) -(8/3)(f -9.75) mW 
5250.2MHz - 5251MHz  101+log(5) -(f-9)mW/MHz  
5251MHz - 5260MHz  10-1+log(5) -(8/90)(f -11)mW/MHz  
5260MHz - 5266.7MHz  10-1.8+log(5) -(6/50)(f -20)mW/MHz  
5266.7MHz ≦ 12.5μW/MHz  
20MH z to 
40MHz  5190MHz  ≦ 5141.6MHz  12.5μW/MHz  
5141.6MHz - 5150MHz  75μW/MHz  
5230MHz  5250MHz - 5251MHz  10log(5) -(f-20)+log(1/2)mW/MHz  
5251MHz - 5270MHz  10log(5) -(8/190)(f -21)-1+log(1/2)mW/M
Hz 
5270MHz - 5278.4MHz  10log(5) -(3/50)(f -40)-1.8+log(1/2)mW/
MHz 
5278.4MHz ≦ 12.5μW/MHz  
40MHz to 
80MHz  5210MHz  ≦ 5123.2MHz  12.5μW/MHz  
5123.2MHz - 5150MHz  75μW/MHz  
5250MHz - 5251MHz  10log(5) -(f-40)+log(1/4)mW/MHz  
5251MHz - 5290MHz  10log(5) -(8/390)(f -41)-1+log(1/4)mW/M
Hz 
5290MHz - 5296.7MHz  10log(5) -(3/100)(f -80)-1.8+log(1/4)mW/
MHz  
5296.7MHz ≦ 12.5μW/MHz  
' f ' is the separation from the carrier frequency. (unit : MHz)  
 
(unlicensed 6GHz WLAN system (LPI) )  
OBW  reference 
channel  applied frequency 
region  Allowable unwanted emission 
level  
(EIRP)  
≦ 20MHz  5955MHz  ≦ 5925MHz  2 µW/MHz  
6415MHz  6425MHz - 6435.9MHz  10 µW/MHz  
6435.9MHz ≦ 2.5 µW/MHz  
20MHz to 
40MHz  5965MHz  ≦ 5925MHz  2 µW/MHz  
6405MHz  6425MHz – 6440.1MHz  50 µW/MHz  
6440.1MHz ≦ 12.5 µW/MHz  
40MHz to 
80MHz  5925MHz  ≦ 5925MHz  2 µW/MHz  
6385MHz  6425MHz – 6440.4MHz  50 µW/MHz  
6440.4MHz ≦ 12.5 µW/MHz  
80MHz to 
160MHz  6025MHz  ≦ 5925MHz  2 µW/MHz  
6345MHz  6425MHz – 6425.5MHz  50 µW/MHz  
6425.5MHz ≦ 12.5 µW/MHz  
160MHz to 
320MHz  6105MHz  ≦ 5925MHz  2 µW/MHz  
6265MHz  6425MHz – 6425.7MHz  50 µW/MHz  
6425.7MHz ≦ 12.5 µW/MHz  
 (unlicensed 6GHz WLAN system (VLP) )  
OBW  reference 
channel  applied frequency 
region  Allowable unwanted emission 
level  
(EIRP)  
≦ 20MHz  5955MHz  ≦ 5925MHz  0.2 µW/MHz  
6415MHz  6425MHz - 6425.5MHz  50 µW/MHz   
6425.5MHz ≦ 12.5 µW/MHz  
20MHz to 
40MHz  5965MHz  ≦ 5925MHz  0.2 µW/MHz  
6405MHz  6425MHz – 6425.4MHz  50 µW/MHz  
6425.4MHz ≦ 12.5 µW/MHz  
40MHz to 
80MHz  5925MHz  ≦ 5925MHz  0.2 µW/MHz  
6385MHz  6425MHz – 6425.2MHz  50 µW/MHz  
6425.2MHz ≦ 12.5 µW/MHz  
80MHz to 
160MHz  6025MHz  ≦ 5925 MHz  0.2 µW/MHz  
6345MHz  6425MHz – 6425.1MHz  50 µW/MHz  
6425.1MHz ≦ 12.5 µW/MHz  
160MHz to 
320MHz  6105MHz  ≦ 5925MHz  2 µW/MHz  
6265MHz  6425MHz  ≦ 12.5 µW/MHz  
 
 
Leak radiation 
from receiver 
circuit  At the frequency region  
   less than 1GHz ：4nW  
   more t han 1GHz ：20nW  
Usage  condition ・2.4GHz WLAN system ：none  
・5.2GHz WLAN system ：indoor use only(*) , except connecting to 5.2GHz 
High -power WLAN  system  (Fixed -AP) 
・5.3GHz WLAN system ：indoor use only(*)  
・5.6GHz WLAN system ：do not use in the sky (except using in an airplane)  
・5.2GHz High- power WLAN system ：Fixed -AP 
・6GHz WLAN system  (LPI)： indoor use only( *) 
・6GHz WLAN system (LPI) -Client to Client connection ：Requiring client 
devices to decode an enabling signal from an LPI A ccess Point at a 
minimum received power of -95 dBm/MHz every four seconds.  
・6GHz WLAN system (VLP) ：do not use in the sky 
(*) Indoor includes trains, boats, and aircraft exceptionally includes cars in 
the 5.15 - 5.25 GHz band.  
License  ・2.4/ 5.2/5.3/5.6/6 GHz WLAN system ：unlicensed  system  
・5.2GHz Hi gh-power WLAN system ：registered system  
 
５ Proposed dat e of entry into force  
December , 2023