4 ms·

No; in the US, for example, Part 15 devices are, I think, limited to a maximum of 1W transmitted power at 2.4GHz, and 4W of EIRP (effective isotropic radiated p

No; in the US, for example, Part 15 devices are, I think, limited to a maximum of 1W transmitted power at 2.4GHz, and 4W of EIRP (effective isotropic radiated power). i.e. maximum antenna gain of 6dBi at full power. For fixed, point-to-point installations there is a special rule in effect: you can get more EIRP by having higher gain antennas as long as you back off the power; e.g. you can drop down to 22dBm (159mW) but have a 30dBi antenna and get 52dBm (159W) of EIRP. A 30dBi antenna at 2.4GHz is, by the way, something like a 1.5 meter diameter parabolic grid.

8bitsrule 5y ago
Power levels can depend on the service and region. For an example in the US, this Wikipedia page outlines part 15 fairly completely, and links to most types of services with more details: https://en.wikipedia.org/wiki/Title_47_CFR_Part_15 https://en.wikipedia.org/wiki/Title_47_CFR_Part_15 E.g. I followed the link to '802.11 wireless LANs', thence to to '2.4_GHz_radio_use' where I was surprised to learn that US 'Amateur Radio operators can transmit [video&audio] ... in the 2.4 GHz band—and all ISM frequencies above 902 MHz—with maximum power of 1500 watts.'
- sbierwagen 5y ago
  Back in the day Ubiquiti used to sell a bunch of radio modules that let you transmit on the ham or public safety bands using their wifi equipment. Presumably they also had firmware that implemented the other limits. (Ham transmissions can't be encrypted and must include your callsign)
- NovemberWhiskey 5y ago
  Right; however that's a licensed form of usage - 802.11g channels 1 through 6 are all entirely within the 13cm amateur band in the U.S.
  - bagansio 5y ago
    That's incredible
red0point 5y ago
Any idea where to get a good quality 30dBi antenna these days (for 2.4GHz or different frequencies)?
- avidiax 5y ago
  https://mikrotik.com/products/group/antennas https://mikrotik.com/products/group/antennas But that's 5GHz or 60Ghz.

8bitsrule 5y ago

Power levels can depend on the service and region. For an example in the US, this Wikipedia page outlines part 15 fairly completely, and links to most types of services with more details: https://en.wikipedia.org/wiki/Title_47_CFR_Part_15 https://en.wikipedia.org/wiki/Title_47_CFR_Part_15 E.g. I followed the link to '802.11 wireless LANs', thence to to '2.4_GHz_radio_use' where I was surprised to learn that US 'Amateur Radio operators can transmit [video&audio] ... in the 2.4 GHz band—and all ISM frequencies above 902 MHz—with maximum power of 1500 watts.'

sbierwagen 5y ago
Back in the day Ubiquiti used to sell a bunch of radio modules that let you transmit on the ham or public safety bands using their wifi equipment. Presumably they also had firmware that implemented the other limits. (Ham transmissions can't be encrypted and must include your callsign)
NovemberWhiskey 5y ago
Right; however that's a licensed form of usage - 802.11g channels 1 through 6 are all entirely within the 13cm amateur band in the U.S.
- bagansio 5y ago
  That's incredible

red0point 5y ago

Any idea where to get a good quality 30dBi antenna these days (for 2.4GHz or different frequencies)?

avidiax 5y ago
https://mikrotik.com/products/group/antennas https://mikrotik.com/products/group/antennas But that's 5GHz or 60Ghz.