E-Band and V-Band - Survey on status of worldwide regulation
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ITS are regulated by:
ECC/DEC(09)01
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: “ECC Decision on the harmonised use of the 63-64 GHz frequency band for
Intelligent Transport Systems (ITS)” [7].
Regulatory emissions limitations
The upper part of V-Band (i.e. 57 to 66 GHz) is generally intended by a majority of administrations for
“unplanned/uncoordinated” deployment. Therefore, for the sake of maintaining a fair and efficient use
of the band, most regulations impose limitations in the emissions levels and, often, in antenna gain.
In the CEPT area the recommendation ECC/REC(09)01 indicates that the following limitations apply:
Maximum EIRP: +55 dBm
Minimum antenna gain: +30 dBi
Maximum transmitter output power: +10 dBm
According to this recommendation the combination of 57-64 GHz with 64- 66 GHz channel planning
according to ECC/REC(05)02) is also possible.
However, ECC/REC(05)02 does not have any emissions limit and this might imply an improper (or unfair)
use of the band by high power and low antenna gain systems.
The FCC in the USA adopted a methodology (initially for E-Band) of limiting the maximum EIRP as a
function of antenna gain (G) with a general formula:
EIRP (dB) = EIRPmax (dB) – 2*(Gmax-G) (dB).
Where EIRP and G are the values actually permitted in that station, while EIRPmax and Gmax are stated
by the FCC. For V-band, Part 15 states:
EIRPMax = +82 dBm
Gmax = +51 dBi
In addition, FCC Rule Part 15.255 states that for indoor equipment the average power of any emissions
shall not exceed 40 dBm and the peak power of any emissions shall not exceed 43 dBm. Recently, the
FCC have clarified that outdoor equipment, like WiGig, can comply with both this rule or the rule above
limiting the maximum EIRP as a function of antenna gain - whichever provides the higher EIRP limit.
This implies that, given the EIRP limitation and the maximum transmit power, the minimum antenna
gain in the FCC area becomes 13 dBi.
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To avoid possible misunderstanding it may be worth noting that ECC/DEC(09)01 is a different document with respect to the
above mentioned ECC Recommendation (09)01. One is a Decision and the second is a Recommendation.
