wifi antenna mod

[Luising]

Please post your pics of home made wifi antennas or mods

[Luising]

this is my home made antenna

also a link with more info

http://www.stanford.edu/~jstockdl/tmp/usbwifi.orcon.net.nz/

[Luising]

if this is in the wrong area please let me know

[Blergo]

to be honest i dont think many people will have moded or made their own wifi antennas on here. Personally i think a bipole antenna would be more suitable as it would be less directional. but then again there may be reasons why people dont use them for wifi, im no expert in wifi. just speaking from experience in amature radio, cb, that kinda stuff.. :)
owen

[Luising]

thanks for the reply i made a dish antena for wifi with a gain of 15 to 18 dbi aprox

and for the cost its wort it

and then this site is full with people that like to make their own thigs like wc pch and mods so that why i posted in hope of a overclocked wifi device lol...

[Szpara]

oh nice ....we have a project going on in our class so... ill post bunch of pix this friday^^

[Mongo129]

you should check this page out it has some good ideas and shows som significant gains.

http://www.usbwifi.orconhosting.net.nz/

[Itchy]

Ive got a full tutorial from an old APC magazine, very similar to Mongo's link. I'll scan it tomorrow while im at work if you like. Havn't tried it personally, but my mate did about a year ago and reported pretty good results. Basically just involves a 6in chinese wire strainer, cable ties and your usual equipment. Definately worth a look.

[XHAFMaster]

What about a dish from Direct TV or Dish Network????

[Mongo129]

@XHAFMaster:
that should work, most parabolic dishes should enable you to get greater gain on your antenna once you find the focal point of the dish, if you are using mesh i believe the size of the hole in the mesh make a difference.

I work for a wireless ISP in my country and we have one customer far out of range of one of our cell towers but he is using a skytv dish to increase the gain of his antenna and is able to connect with a rather strong signal, and we run on a frequency close to wifi about 400-300mhz off i think.

[Szpara]

my progresss.....



the tube...
http://i70.photobucket.com/albums/i102/szpara15/Image102.jpg


you got to love this!~ aluminium tape!
http://i70.photobucket.com/albums/i102/szpara15/Image103.jpg


http://i70.photobucket.com/albums/i102/szpara15/Image108.jpg
http://i70.photobucket.com/albums/i102/szpara15/Image114.jpg

i thougt it would be cool to have someting like this....
http://i70.photobucket.com/albums/i102/szpara15/Image112.jpg


http://i70.photobucket.com/albums/i102/szpara15/Image115.jpg
http://i70.photobucket.com/albums/i102/szpara15/Image116.jpg
http://i70.photobucket.com/albums/i102/szpara15/Image118.jpg

Ohh... while i whos going trugh my pix i found the server our class supposed to hack(or test the verebilitys)... of server 2000 with out any updates...

http://i70.photobucket.com/albums/i102/szpara15/Image067.jpg

[Itchy]

Hey guys, sorry bout the delayed post. Was waiting for the colour scanner to come back in... looks like it could be a while lol. So I've just scanned it in B & W.

Asked my mate about it the other day, he said he's still using it. He reckons he's getting around a 16dB gain, which is fairly decent.

Hope this helps....

BTW, Szpara ur antenna is looking sweet man! Hope you get some impressive results with it.

Link to PDF. http://rapidshare.com/files/225172157/Wi-Fi_booster.pdf.html

[Szpara]

http://i70.photobucket.com/albums/i102/szpara15/Image069.jpg

http://i70.photobucket.com/albums/i102/szpara15/Image080.jpg

[lism]

to be honest i dont think many people will have moded or made their own wifi antennas on here. Personally i think a bipole antenna would be more suitable as it would be less directional. but then again there may be reasons why people dont use them for wifi, im no expert in wifi. just speaking from experience in amature radio, cb, that kinda stuff.. :)
owen

Well if you speak based upon experience in CB kinda things you would know a decent antenna would need a 1:1 ratio especially using with linears and so on. I builded an external antenna once from just a radio antenna which was used for FM frequencies recieval but it only lasted for a week to tear down the transmitter of the wireless card. Basicly, if you dont know what your doing, dont even start making your own antenna's as they need proper 1:1 ratio's. And building one from imagination won't get you towards 1:1 perfect ratio. It'll only damage your transmitter and in the end you only see wireless network but cannot connect to them anymore.

There are some good guides on the net and even a pringles bus will do fine lol. Hell you can extend your little antenna as long as you use proper wire and soldering. Make sure you dont have "open" connections as they will cause interfearance or either worse recieve/transieve-loss.

[Itchy]

Wow Szpara, ur antenna turned out sick! Didnt realise what level you were originally aiming at. But its ended up very nice indeed... Be sure to let me know how it goes! :clap:

Also, I'm digging the tri-pod as a mount haha

[Szpara]

dont worry lism, noting is toching anything thats not siposed too..
my networking teacher asked me if i was using any guides, well no.
Im going to get a wifi card for the laptop im using in school for this project that ill have to mod... even my teacher highlided that
it dosint mean that ill stop there... ill be working on another on if i fail:D:D

[lism]

It's not about shortcuts or anything but rather the resistance on the antenna and your output in miliwatts. If the antenna does not have a 1:1 to 1:5 resistance rather anything above it is coming back into your transmittor which causes it to be damaged after a while.

[Szpara]

I'm confused :confused:

[purecain]

wow...this is amazing.... i'd love to have this kind of knowledge at my disposal.... really interesting... keep on posting this stuff man.....

[Slibri]

i dont get how any of this is usefull... but it all looks so interesting

[lism]

I'm confused :confused:

If you do it wrong you can damage your wireless card and basicly connect towards nothing anymore.

[ArcticOC]

When I did the new world record in Bluetooth transmission, I built this microwave head for my small parabolic dish :D

I hacked a mobilephone over a distance of 2,125KM

http://www.hardware.no/artikler/blaatann-gutta_slaar_til_igjen/11381

The record has not been beaten to this very day :)

My neighbor asked me if I had started to work for Interpol or NASA.. haha

http://img154.imageshack.us/img154/7818/biquaddaytime.jpg
http://img154.imageshack.us/img154/9626/smallantenna.jpg

[Barrman]

wow that's one heck of a dish arcticoc. Did you rob a radio station lol? Anyways this whole ratio thing, lets call it by its proper name. He is referring to impedance matching. Impedance is the complex form of resistance containing the real (resistive) and imaginary (reactive) parts of a materials impedance. The idea of matching come from the quest for maximum efficiency. The maximum power transfer from your transmitter(wireless card) to the transmission line (antenna) will occur when their impedances match each other. The more the impedances match in the connections the more it forces ringing and reflections to zero (good for efficiency and signal integrity). The hard thing about designing antenna is that the common impedance for radio frequency interconnects,driver, etc. is about 50ohms and the impedance of free space (or air) is about 376 ohms. This means that you cant build a perfect antenna (unless you have control over the output stage of your driver chips) because you need to make comprimises between matching to the circuit and matching to the air. The safest bet for keeping your transmitter (wireless card) alive is to match its impedance and disregard trying to match the impedance of the air. this will minimize the stress on the driver since it will achieve maximum power transwer to and from the antenna. The problem with this approach is that you wont see any gains in power other than from directionalizing the beam (using a tube waveguide instead of the omnidirectional stock antenna) which will increase transmit sensitivity but not necessarily receive sensitivity (as it might reduce the effective area of the reciever) it depends on the situation.

Well good luck with the expierement I hope this helps. for more information check out electromagnetic field theory fundamentals by bhag guru and husseyin hiziroglu. Its one of the better (and easier to understand) books on the subject.

[Mean Machine]

When I did the new world record in Bluetooth transmission, I built this microwave head for my small parabolic dish :D

I hacked a mobilephone over a distance of 2,125KM

But then again, if you don't live in Oslo in Norway, you probably have use for that dish, since people are so few and far between. ;)

[ArcticOC]

But then again, if you don't live in Oslo in Norway, you probably have use for that dish, since people are so few and far between. ;)I live above the arctic circle, so yes.. a really big antenna is nice to have ;)

Still got the monster and it`s for sale with custom the custom built microwave head, the totalt gain is higher than 40dbi. :D Perhaps I call SETI and ask if they buy it ;)

[grasskicker509]

http://img154.imageshack.us/img154/7818/biquaddaytime.jpg[/IMG]
http://img154.imageshack.us/img154/9626/smallantenna.jpg

how many channels you get with that?:eek:

[Szpara]

BTW my antena faild it wos tooooo...ooo long i would get even wore ingal unless i pontedet right exacly into the AP then i got enprovment other then that, its fail.

[ArcticOC]

how many channels you get with that?:eek:
I can pick up 384 different Access Point`s right from my balcony :D If you got the right skills you can have a lot of fun with it ;) Sniffing packets, decrypting and analyzing the network traffic can be quite educational..

[i found nemo]

http://img154.imageshack.us/img154/9626/smallantenna.jpg

can someone make a cap that says: nothing illegal here guize!

[ArcticOC]

http://img14.imageshack.us/img14/6504/smileydish.jpg

can someone make a cap that says: nothing illegal here guize!

Nuthin` illegal here, I only use the antenna for purely educationaly purposes!

..and just to show the world how nice a guy I am.. I`m planning to re-paint the antenna this summer :)


It isn`t called Xtremesystems for nothing, is it? ;)

[i found nemo]

olollollololol

[zsamz_]

i freind built 2 with satelite dishes just so that he could use his brothers wifi 2 blocks away:eek:

[Ecca]

http://img199.imageshack.us/img199/7083/46410794.jpg

[Jamesrt2004]

ahh man this made me lol :P

[ArcticOC]

ARP pollution
Yes, but far less than the average omni-antenna running multichannel technology found in most equipment these days..

Reason: My antenna has a narrow lobe, only 2-3deg. And it has virtually no side-lobes.. the affected sector RF is admitted is very limited :wave: