> I've stumbled across problems with the transmission output power of OpenWrt
> routers quite often.
> E.g. https://bugs.openwrt.org/index.php?do=details&task_id=1289&pagenum=4
> which I still have to look into in greater detail.
> OpenWrt's handling of TX power, antenna and PA gains needs to be re
On 4/29/19 8:24 PM, Matthias Schiffer wrote:
This is just the factor of 1/2/3/4 (approximated) in dB:
10^0.0 = 1
10^0.3 ≈ 2
10^0.5 ≈ 3
10^0.6 ≈ 4
I've seen these numbers being used in WLAN drivers to account for the
antenna array gain, so at least this part of the TX power computation might
alr
This is just the factor of 1/2/3/4 (approximated) in dB:
10^0.0 = 1
10^0.3 ≈ 2
10^0.5 ≈ 3
10^0.6 ≈ 4
I've seen these numbers being used in WLAN drivers to account for the
antenna array gain, so at least this part of the TX power computation might
already be working as expected.
Kind Regards,
Mat
Hi Matthias,
thank you for the hint. That's funny, because someone from the German Federal
Network Agency
said that when radios have multiple antennas, the aggregated EIRP of the
antenna array must not exceed the
EIRP limits of a single antenna, but I've assumed this is done in hardware and
not
On 25/04/2019 17:54, Vincent Wiemann wrote:
> First EIRP is by definition ERP + antenna gain - cable loss.
Hi
Small detail: Don't forget the antenna array gain.
So EIRP as:
Antenna Port Power
+ Antenna Gain
+ Antenna Array Gain
- Cable Loss
The Array Gain as a simple lookup table:
1 Antenna: 0
2
Hi,
I've stumbled across problems with the transmission output power of OpenWrt
routers quite often.
E.g. https://bugs.openwrt.org/index.php?do=details&task_id=1289&pagenum=4
which I still have to look into in greater detail.
OpenWrt's handling of TX power, antenna and PA gains needs to be revised
