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
Updating this patch as likely still valuable for v19
WIP on master edited for Linux 4.19 and ath79 spi-nand suggests that
support will be possible after ath79 master moves to Linux 4.19
Jeff
From 7bd39bc01d8b0a03e796268f06f99b5a65fc353a Mon Sep 17 00:00:00 2001
From: Jeff Kletsky
Date: Mon,
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
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
Adrian-
I have a C7V2 and can do some testing on it if you'd explain exactly what
you're looking for... I don't quite follow what is needed in the above
thread. Something about looking at PCI paths before and after an upgrade
from one version to another...
Camden
On Mon, Apr 22, 2019 at 4:45 AM
> 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_id=1289=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
>
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,
