HUACAM HCM19 2.4GHz 5GHz Dual Band 9dBi Indoor Omni-Directional Antenna 802.11n/b/g RP-SMA Male Connector + 2 U.FL Mini PCI to RP-SMA Pigtail Antenna WiFi Cable

Works fine, got it for my HTPC which was having WiFi issues even though it was 15 ft. from my modem.Didn't check the dimensions when I ordered this, the antennas are 15 inches long (extended horizontally) so keep that in mind if the height is a limitation.Hooked the antennas up to a Lenovo ThinkCentre M92P Tiny, didn't try the pigtail cables as the ones that were installed work just fine.I was nearly able to max out my internet connection's downstream, speed tests show 200 Mbps (25 MB/s) which is near my max speed.Read/Write to and from my NAS was also about 25 MB/s for both on a 5 GHz WiFi connection, not sure if the WiFi card and 802.11 type affects the maximum speed, the HTPC and it's WiFi card are a little old (5 years), newer WiFi cards may (?) see better throughput provided there are no other bottlenecks (e.g. signal strength and modem).

Really well built units, everyone that said they are not are haters. AP is 50 feet away through 3 walls, signal with 5 db antenna was weak and wifi was in and out. Added in one of these antennas and the signal noticably increased and connection was as good as it gets without further modifications to the router. Keep in mind that adding a better and higher gain antenna will not always solve wifi issues, transmit power of the wireless device, location, tons of other devices and access points causing interference, walls, and many other factors can play a role in your WiFi happiness. But these antennas won't be part of the problem.

These antennas didn't help me with my router. For all I know the existing antennas that came with the router may be better than I realized. The ac signal (5GHz) actually went down a little as measured via inSSIDer. Not enough to be a bar, but it decreased. My router has internal N (2.4GHz) antennas and these did help the N strength - Although that's not the band I wanted increased.These may be okay, I can't really tell. They just didn't increase my ac signal as desired.

I somehow managed to lose the original antennas of my router, and decided to try out a high gain one to replace it. First off, these antennas are huge - make sure you have enough space for them where your router is located! Naturally, I decided to test the difference in RSSI with no antennas vs these ones. I was pleasantly surprised to find that it improved it by around 15dB in most places, and in one location it improved 2.4GHz by 30dB!! I almost couldn't believe it. Overall, these antennas helped throughput (although not quite as much as I might have expected by the 30dB number), but more importantly range and reliability of my wifi.

So I decided to purchase 3 of these, because I can't get wifi in my room, and I installed a security system that works off Wifi, and needed some extra range on that as well. Turns out this was a bad decision. Despite the antennas being twice the length, none of the signals improved. I still don't have Wifi in my room, and the security system cameras still do not function optimally, because of the weakened signal.Maybe I did something wrong here, but it is just plug and play......... Either way I am disappointed at my $30. I should have just saved it and lived with what I had, instead of spending it, and still living with what I had....

I used a dB meter on my phone and tested a few locations in my home. Conclusion, these perform about the same or worse than my much smaller router antennas (to be fair I have an expensive $300 router so that might not be true if you have a cheap router with cheap antennas).

they are pretty much what you are looking for in a 9dBi antenna. However, the swivel is too loose for my liking. but not a defect by any means.

The antennas just LOOK impressive - doesn't really improve anything though. Better off finding something else instead...