On 07/27/2018 11:49 PM, Carlos E. R. wrote:
Hi,
Apparently for tethering my laptop to my mobile phone I can configure to use 2.4 or 5 Ghz. So I wonder which uses less battery - on each side. If it is a significant difference.
Normally on radio higher frequency uses less energy (and reach less distance and is more directive)
Just curious! :-)
Normally, higher RF frequencies need MORE power to achieve the same range, unless the difference is made up by more antenna gain. I would think, however, that a phone or router or any simple device, would probably use the same RF output power at either of the two frequency bands, or perhaps even lower at the higher, and thus the range would normally be shorter, with common internal antennas. It is also true (to some extent) that the same power output at higher microwave frequencies requires a higher drain from a battery supply, altho this is improving day by day. --doug, WA2SAY, retired RF Engineer -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org