Posted: Sat Jun 20, 2020 7:55 Post subject: Looking for a very sensitive Router
I would like to use a DDWRT-Router as Wifi Client. Currently I am using a TP-Link WR842N and TL-ANT2424B Beam Antenna (+23dB!), but I can barely see the AP, I want to connect to.
When using an old Alpha AWSUS036H with the TL-ANT2424B to connect the Laptop directly i can get a good connection and see much more APs than using the Router.
Cable, Antennadirection is same.
Joined: 04 Aug 2018 Posts: 881 Location: Appalachian mountains, USA
Posted: Sat Jun 20, 2020 19:23 Post subject:
Wifi receiver sensitivity isn't likely to really be the issue, as that specification is for measurements in laboratory conditions, where the signal is competing only with internally generated noise. In the real world, the received signal strength required is largely a matter of what interference from other users is present on the channel. In most city and suburban environments, there is a great deal of 2.4 GHz interference. On 5 GHz there is less, but it still can be significant for apartment dwellers.
Also, be aware - and maybe you are but let's make it a teaching moment for others - that a 23 dBi antenna has a very narrow beam. It concentrates the radiated power into about 1/200 of possible 3D directions, leaving other directions starved for power. Things will be the same for receive: great sensitivity in a very narrow beam and very, very poor sensitivity in other directions. _________________ Five Linksys WRT1900ACSv2's on 42926, 43904, 44048:
VLANs, multiple VAPs, NAS, QoS, client-mode travel router, OpenVPN client/PBR (AirVPN), wireguard/PBR (AzireVPN), two DNSCrypt servers (incl Quad9) routed through OpenVPN.
Joined: 24 Oct 2008 Posts: 922 Location: Latin America
Posted: Sun Jul 12, 2020 23:16 Post subject:
Do you want to use the high gain external antenna you have? If so, either play with the antenna chains for a multi-tx-rx device, or find a single external removable antenna device. If your reference is an Alfa high power USB, and you are in a budget, you can get a second hand router with alike specs, like a Buffalo WHR-HP-G54.
Note: like SurprisedItWorks explained, a very high-gain antenna generates/receives a very narrow beam (think on a directional antenna like a flashlight you zoom according to the gain, and an omnidirectional antenna like a rubber donut you squeeze deppending on the gain). _________________ Worked with: WR850Gv2, WHR-HP-G54, WRT54 G/GL/GS, f5d7231-4p, wl-520gU, WRT150N, DIR-400A1, DIR-600B1, WLI-TX4-G54HP, WHR-HP-GN, F7D3301/FD7301, F7D3302/F7D7302, WNR3500Lv2, e1000
thank you for your replies.
The best budget solution I realized is using an TP-Link WR842N and having the Alfa connected to the USB-Port for Uplink. For nearby Wifi the router is good enough.
Unfortunately I was not able to realize this using DD-WRT but OpenWRT and Travelmate plugin.
Now I get a pretty stable connection to the public AP with a very narrow beam (less disturbing other APs) and share this network.
Thank you for your ideas and inputs. You people are great!