2.4ghz amplifier - Page 1
Forum section: electronics / beginners

author: Unknown
author_rank: Unknown
timestamp: October 13, 2013, 12:34:05 am
content: http://postimg.org/image/c0bj4wcjh/heres the img how i think..is there any way to amplify 2.4ghz wifi signal..i have 3 bars of 5 ...and if you have any diagram how to build one .Thxjust need to know if i can or not

author: AlfBaz
author_rank: Super Contributor
timestamp: October 13, 2013, 01:25:38 am
content: Just tape a coat hanger to your wifi dongle

author: madshaman
author_rank: Frequent Contributor
timestamp: October 13, 2013, 01:57:43 am
content: Quote from: zorkwan on October 13, 2013, 12:34:05 amDo you think you will need to ensure that you don't amplify the transmitting signal since it will also be on your antenna? Do you plan to amplify both directions of communication?

author: hedgewallace
author_rank: Contributor
timestamp: October 13, 2013, 02:18:44 am
content: You can buy WiFi boosters. Just put it in an area that has pretty good reception (4 or 5 bars) and it should boost your range a bit.Check out this link:http://www.pcmag.com/article2/0,2817,2372811,00.aspOne thing you might also want to look at is a network power line adapter. it's pretty much an adapter that can transmit network signals from an Ethernet cable through your power cables in your house. You would plug one adapter in near your modem, and the other adapter in near your computer, or WiFi router.

author: alxnik
author_rank: Regular Contributor
timestamp: October 13, 2013, 03:18:18 pm
content: wifi is duplex. An amplifier will boost tx signal but rx will stay the same so the link will not be any better. To have a better link you need a better antenna.Check your other post, you will find info there.

author: Unknown
author_rank: Unknown
timestamp: October 13, 2013, 05:35:04 pm
content: Quote from: madshaman on October 13, 2013, 01:57:43 amno just the receiver

author: Unknown
author_rank: Unknown
timestamp: October 13, 2013, 05:41:26 pm
content: Quote from: alxnik on October 13, 2013, 03:18:18 pmso you mean that i cant amplify my receiver,only my transmitter ,,cant understand whytheres signal coming from my transmitter to the receiver(antenna) and from my receiver ad a amplifier to get better signal and from there to my usb wifi adapter - and pcantenna- to amp -to wifi adapter- to pc

author: alxnik
author_rank: Regular Contributor
timestamp: October 13, 2013, 08:49:06 pm
content: Quote from: zorkwan on October 13, 2013, 05:41:26 pmI don't think there are any amplifiers that amplify the receiving signal, only transmit. Most probably you will get nothing anyway. What matters is the SNR (signal to noise ratio). If you amplify the receiving signal, you are amplifying the noise too. The only way to reliably get a better link is to get a higher gain antenna which must be directional. A yagi wifi antenna costs about 25 euros on ebay, and I doubt you will find a receiving signal amp (if it exists) with that kind of money.

author: tszaboo
author_rank: Super Contributor
timestamp: October 14, 2013, 03:52:38 am
content: Just put an LM358 in non inverting configuration with a gain of 1,4

author: Kryoclasm
author_rank: Regular Contributor
timestamp: October 14, 2013, 08:43:41 am
content: This works a treat, but it is directional and ugly.http://www.makeuseof.com/tag/how-to-make-a-wifi-antenna-out-of-a-pringles-can-nb/

author: HamiltonHipster
author_rank: Contributor
timestamp: October 14, 2013, 09:53:23 am
content: Quote from: NANDBlog on October 14, 2013, 03:52:38 amI was thinking a LM741 because of its superior noise characteristics.Zorkwan, you might want to try the coat hanger or pringles. Is 3/5 bars so bad? does it drop your data rate below whats provided by your ISP?

author: ee.jmlp
author_rank: Contributor
timestamp: October 14, 2013, 11:31:54 am
content: put a reflector in a places where the signal does not come to concentrate the received power in the antena. Not every distance will be ok, you must move it according of the power level received. Better if the reflector is concave or parabolic with its focus on the antenna.Aluminium would be okay. Treat wifi singnal as light you cann't see.

author: madshaman
author_rank: Frequent Contributor
timestamp: October 14, 2013, 12:49:47 pm
content: Quote from: zorkwan on October 13, 2013, 05:35:04 pmSo you're absolutely sure the transmitted signal won't get in your amplifier, by reflection or other means? How do you plan to ensure this? (Maybe google "diplexer" and "duplexer")

author: tszaboo
author_rank: Super Contributor
timestamp: October 14, 2013, 01:27:14 pm
content: Quote from: HamiltonHipster on October 14, 2013, 09:53:23 amAre you aware that for amplifying a 2.4Ghz signal you need something, which has bigger gain-bandwidth than 2.4Ghz? Which is usually high-end stuff by itself, and you need $$$ equipment to test it if it is working properly or not.

author: AlfBaz
author_rank: Super Contributor
timestamp: October 14, 2013, 01:31:11 pm
content: Quote from: NANDBlog on October 14, 2013, 01:27:14 pmOh... Surely he was being sarcastic

author: tszaboo
author_rank: Super Contributor
timestamp: October 14, 2013, 01:33:32 pm
content: Quote from: AlfBaz on October 14, 2013, 01:31:11 pmOK, I thought someone actually took my LM358 bait...

author: Unknown
author_rank: Unknown
timestamp: October 14, 2013, 02:46:43 pm
content: Quote from: alxnik on October 13, 2013, 08:49:06 pm

author: madshaman
author_rank: Frequent Contributor
timestamp: October 14, 2013, 03:36:15 pm
content: Quote from: alxnik on October 13, 2013, 08:49:06 pmThere's plenty of surplus high bandwidth amps on eBay fairly cheap, even more in the selective 800-900Mhz, 1750-2200Mhz and around 2.5Ghz for cellular, cellular data and wifi.

author: geraldjhg
author_rank: Regular Contributor
timestamp: October 14, 2013, 06:30:54 pm
content: hibuy an amplified usb cable ant take dongle outsidecould work