guest9999

Hi guys! I don't know what is wrong, could some of who are experts take some time and give me some info. I have Alfa NHA usb adapter. When I use Alfa directional 7dBi antenna(which is pretty small) as seen in photos I have ok range, works nicely, solved driver issues. I want more range, seems awesome to get more range and I bought 21 Dbi panel antenna(pretty large), 2.4 Hz range as in photos. The thing is I expected that there will be a lot of increase in range and was all excited. The thing is the range from the 21 dBi polish made yagi.pl panel antenna is in similar range as in smaller 7 dbi one, it works even worse I think. I don't get it. The coaxical cable is 3m long, the connectors were made by a guy who does that often. I don't understand why is the range so bad, is the design from polish antenna for 20-40 euros bad, or is the cable issue or am I expecting too much, do I need to calibrate it somewhow? The big 21 dBi antenna on the photos is 40cm x 40 cm. I hope someone will take some time to answer, I don't understand it. Thank you!

Hi Guys! Yes it is good advice to place antenna high and without obstacles I agree. But I still think is something with connectors(like you said swarg_eu), tried to solve it and need to test more. For testing I used 3 antennas in the same spot a few cm from the window. They were directed at the same or similar spot. I used linux software linSSID, which has nice graphical representation of signal quality and min, max ranges. The adapter was Alpha NHA. The antennas were: Alpha 5-7 dBi omni directional stick, Alpha 7dBi directional one and 18-21 dBi directional square panel antenna. The omni directional stick performed the worse. Suprisingly 21 dBi one performed worse than 7 dBi directional. The 7 dBi directional was pretty good one. I get a lot of signals from different directions, much more than from 21 dBi one. If I point it in the same direction as wifi router is positioned in the house(different room, different floor) I get great signal quality, better than from 21 dBi one. In longer distances the quality varies. In some cases if I point panel 21 dBi antenna in the right direction the former wins, but not always. I am really suprised that if I point larger 21 dBi antenna from window to another neighbor house, which is 100m away without obstacles I get only 80 PWR tops on airodump or linSSID. I was expecting much better signal. 7 dBi panel antenna gives me 76 dBi tops and seems more consistent. The problem is most likely cable, however,.... I am still searching online stores to buy direct adapter so I wouldn't use any cable. I need male BNC from antenna and female SMA to adapter. It is almost impossible to find one, been searching it a lot. The problem is female RP SMA, beacause I can't find the right one, so I could screw the adapter on it, the thread has to be the opposite. I have been searching https://www.tme.eu/en/, but haven't found the right one. If someone posts a link to eu based store so I could buy the right one I would appreciate it!.

Admin thx for the effort. At least I know the antenna is good. I don't understand that as well, I don't get it. I will buy adapter and try alfa nha directly on the antenna without the cable. I will buy one 12 dbi one as well and compare the results. I expected that that antenna would penetrate 1 wall in another direction as window so I would get signal from house near by. Or that if I use antenna in the attic I would detect ap signals from at least 1 km away, but I don't. 500-600 m at best.

It is not super precise or always symmetric -1 mm error in some instances. Rectangles are 61 x 45 and not 60 x 45. Also backplate reflector is 410 mm.

Hi! Here are the images. I tested the cable with multimeter, resistance is same, 0,5 for outer - outer part or inner - inner part seems good if I as amateur understand it. When I tested connected cable with antenna - outer part resistance readings seem good, but inner ones are out of normal as in images(exchange between 0 and 191.8). The connection between large connector on coaxical cable(inner part) and antenna could be the issue. I don't know.

Here are specs from the manufacturer. It is 2.4 Ghz as Alfa Nha.