5GWLAN

5 GHz band low-power data communication system (1)(5.2GHz band, 5.3GHz band)
(Item 19-3 of Article 2 Paragraph 1)

Items

Technical standard

Assigned frequency or designated frequency

5180, 5200, 5220, 5240, 5260, 5280, 5300, 5320MHz
On board aircraft; 5180, 5200, 5220, 5240 only

Number of channels or channel separation

8 (On board aircraft : 4)

Tolerance of frequency

20×10^-6

Tolerance of occupied bandwidth

18MHz

Tolerance of unwanted emission intensity

(1) Below 5140MHz : 2.5µW / MHz
(2) Over 5360MHz : 2.5µW / MHz

Antenna power

(1) OFDM, DS : 10mW / MHz or less
(2) Others : 10mW or less
Tolerance : +20%,-80%

Equivalent isotropically radiated power (EIRP)

(1)

5180, 5200, 5220, 5240MHz : 10mW MHz or less

(2)

5260, 5280, 5300, 5320MHz :

(a)	10mW/MHz or less for equipment having a function to reduce the mean antenna power in one communication system by 3dB
(b)	5mW/MHz or less for other than equipment in (a)

Tolerance of adjacent channel leakage power and out-band leakage power

Adjacent channel leakage powoer
	±9MHz bandwidth at 20MHz detuning : -25dB ±9MHz bandwidth at 40MHz detuning : -40dB
Out-band leakage power
	EIRP : See Attached Table 1, 2 and 3.

Limit of secondary radiated emissions

(1) Below 1GHz : 4nW
(2) 1GHz - 10GHz : 20nW
(3) 10GHz or higher : 20nW

Interference prevention function

Shall have the function of automatic transmission or reception of identification code.

Carrier sensing function (1)

Shall not transmit radio wave when receiving over 100mV/m

Carrier sensing function (2)

See Attached Table 4.

Transmission burst length

4ms or less

Note

DS: Direct spreading
OFDM : Orthogonal frequency division multiplexing

Attached Table 1 : Technical standard for out-band leakage power (5260 - 5320MHz)

Frequency band	Deviation frequency (f) from 5240MHz	EIRP
5140 - 5142MHz	98- 100MHz	2.5µW/MHz orless
5142 - 5150MHz	90 - 98MHz	15µW/MHz orless
5250 - 5251MHz	10 - 11MHz	10^1-(f-9) mW/MHz or less
5251 - 5260MHz	11 - 20MHz	10^{-1-(8/90)(f-20)} mW/MHz or less
5260 - 5266.7MHz	20 - 26.7MHz	10^{-1.8-(6/50)(f-20)} mW/MHz or less
5266.7 - 5360MHz	26.7 - 120MHz	2.5µW/MHz orless

Attached Table 2 : Technical standard for out-band leakage power (5260 - 5320MHz)

Frequency band	Deviation frequency (f) from 5240MHz	EIRP
5140 - 5233.3MHz	26.7 - 120MHz	2.5µW/MHz orless
5233.3 - 5240MHz	20 - 26.7MHz	10-^{1.8-(6/50)(f-20)} mW/MHz or less
5240 - 5249MHz	11 - 20MHz	10-^{1-(8/90)(f-11)} mW/MHz or less
5249 - 5250MHz	10 - 11MHz	10^1-(f-9) mW MHz or less
5350 - 5360MHz	90 - 100MHz	2.5µW MHz orless

Attached Table 3 : Technical standard for out-band leakage power (For old frequency band) (Omitted)

Attached Table 4 : Technical standard for Dynamic Frequency Selection (DFS) function (5260, 5280, 5300 or 5320MHz for in-door use)

Subject radio equipment shall continuously verify the existence of radio wave transmitted from radars within occupied bandwidth of the channel under transmission and detect the radio wave with the probability of 60% or more on the following conditions.

(1)

Transmission rate :

Radio equipment that performs transmission based on IP packet transmission which packet size varies with the transmitting information contents shall transmit radio waves from a master station to slave stations at 50% of the maximum transmission rate of the radio equipment excluding error correction and control signals.

(2)

Pulse width, repetition frequency and the number of continuing pulses of radar wave

Pulse width (μs)	Repetition frquency (Hz)	Number of continuing pulses
1.0	700	18
2.5	260	18

(3)

Antenna input level (Mean power per 1μs when receiving with 0 dBi antenna

Maximum EIRP of radio equipment	Power level received by antenna (threshold)
Below 0.2W	-62dBm or more
0.2W or more	-64dBm or more

Notice: Regulations in the Ordinance Regulating Radio Equipment shall have priority over the descriptions in the sheet when any difference is found between them. Further above descriptions do not cover all of the regulations.