Simple Wi-Fi Yagi (2014)
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Simple Wi-Fi Yagi (2014)
1–10 of 70 posts
Re: Simple Wi-Fi Yagi (2014)
#2What is the legality of this? I have a vague suspicion that operating a device like this would violate some FCC regulations.
Re: Simple Wi-Fi Yagi (2014)
#3I am wondering if antenna calculations are applicable for all types of routers. If not, how can I adapt it to my own setup?
Re: Simple Wi-Fi Yagi (2014)
#4What is the legality of this? I have a vague suspicion that operating a device like this would violate some FCC regulations.
FCC regulations (afaik) only apply to the power output of the device, modifying the antenna like this shouldn't change the power output.
Re: Simple Wi-Fi Yagi (2014)
#5I am wondering if antenna calculations are applicable for all types of routers. If not, how can I adapt it to my own setup?
itll be applicable for any 2.4ghz, 50 ohm radio
Re: Simple Wi-Fi Yagi (2014)
#6I am wondering if antenna calculations are applicable for all types of routers. If not, how can I adapt it to my own setup?
itll be applicable for any 2.4ghz, 50 ohm radio
Not really. It's only really applicable to any router that uses a dipole antenna.
Pragmatically, this means it's only really an option on routers with external whip antennas. Lots of routers have internal antennas, at which point you're going to have problems attaching the thing. Also, if the internal antennas aren't dipoles, it's not an option at all without significant redesign.
Re: Simple Wi-Fi Yagi (2014)
#7What is the legality of this? I have a vague suspicion that operating a device like this would violate some FCC regulations.
FCC regulations (afaik) only apply to the power output of the device, modifying the antenna like this shouldn't change the power output.
FCC regulates EIRP, which is output+antenna gain. For this to be strictly legal you would need to adjust the power down until the EIRP is within the legal limit. Actually to be strictly legal I think it would need to be type excepted by the FCC.
That being said if you're using this in your home/office on a legal channel it would be really difficult to even tell from outside you were using it and almost certainly not worth the FCCs time to even try to watch for it. It's not that much extra gain over the stock antenna.
Re: Simple Wi-Fi Yagi (2014)
#8What is the legality of this? I have a vague suspicion that operating a device like this would violate some FCC regulations.
FCC regulations (afaik) only apply to the power output of the device, modifying the antenna like this shouldn't change the power output.
If it's like here in Australia, they do consider EIRP. So a directional antenna would increase the EIRP, but with just 100mw tx at the output, I doubt EIRP would be over the limit (4W for 2.4Ghz ISM in Australia).
Re: Simple Wi-Fi Yagi (2014)
#9What is the legality of this? I have a vague suspicion that operating a device like this would violate some FCC regulations.
Good intuitions. FCC regulations restrict EIRP[0], which is essentially "what is the signal strength in the strongest direction". It's possible that increasing directionality of your antenna puts you over the EIRP limit (given how routers already try to get _really_ close to it to improve performance).
[0] https://en.wikipedia.org/wiki/Equivalent_isotropically_radia...
Re: Simple Wi-Fi Yagi (2014)
#10Could something like this have any impact on a bluetooth antenna?