Jkx@home » Antennas http://www.larsen-b.com Titanium Exposé Fri, 31 Oct 2025 02:15:37 +0000 en-US hourly 1 http://wordpress.org/?v=3.5 AMOS wifi homemade antenna (Second Ed) http://www.larsen-b.com/Article/226.html http://www.larsen-b.com/Article/226.html#comments Mon, 05 Jun 2006 20:53:32 +0000 admin Continue reading →]]> I already done a AMOS Antenna before but I need to build another one. A bit more robust. I decided to use a N connector, a bit of plumbing.. and here is the result:

http://www.brest-wireless.net/albums/AntenneAmos/DSC02211.sized.jpg
http://www.brest-wireless.net/albums/AntenneAmos/DSC02214.sized.jpg

This stuff, is quite robust right now ;) .. and still have a great gain.

Please note that there is some new AMOS antenna design ;)

Check out http://yu1aw.ba-karlsruhe.de/vhf_ant.htm

]]> http://www.larsen-b.com/Article/226.html/feed 0 Howto to patch a wireless card to add a connector http://www.larsen-b.com/Article/211.html http://www.larsen-b.com/Article/211.html#comments Fri, 22 Jul 2005 14:58:33 +0000 admin Continue reading →]]> I spend a little time to write an article on the Brest Wireless website about various hack to add a connector to a PCMCIA, or USB card.

You can find it out here

a PCMCIA:

http://www.brest-wireless.net/albums/AntenneDivers/dsc01302.sized.jpg

a USB one:

http://www.brest-wireless.net/albums/AntenneDivers/dsc01383.sized.jpg

– Enjoy :)

]]> http://www.larsen-b.com/Article/211.html/feed 1 AMOS wifi homemade antenna http://www.larsen-b.com/Article/209.html http://www.larsen-b.com/Article/209.html#comments Thu, 07 Jul 2005 08:32:25 +0000 admin Continue reading →]]> This is perhaps one of my best homemade antenna.

http://www.brest-wireless.net/albums/AntenneAmos/amos05.sized.jpg
http://www.brest-wireless.net/albums/AntenneAmos/amos06.sized.jpg

I found the original design here: http://yu1aw.ba-karlsruhe.de/Amos.pdf

You can find my construction guide on Brest Wireless website at
http://www.brest-wireless.net/wiki/materiel:amos

My conclusion:

First:

  • Take care of this antenna, I broke the first balun while testing :(
  • and the balun is the hardest part to do

Tests :

  • 13db of gain
  • and a really big beam 120° !
  • the “hot spot” of this antenna is in the middle instead what we usually see in
    omnidirectionnal. So the best height for this antenna is the same as computer.
    And this is a good news.

I usually use a biquad antenna inside my appartement, because my AP is in one corner. Biquad (or patch) offer a performance boost compare to a omnidirectionnal antenna (tested with a 8db doradus). This is mainly due to the reflections with the walls of the room inducted by the omni.

But I need to say that AMOS antenna beat all antennas I tested before in this indoor conditions. It has a larger beam (120°) and a strong front / rear insolation.

The AMOS antenna offer the best parts of the pach / quad and omnidirectionnal antennas for indoor. But take care that vertical angle is not really large so it will perhaps not work for a entire flat :).

]]> http://www.larsen-b.com/Article/209.html/feed 13 biQuad (and double biQuad) homemade wifi Antenna: 14db ! http://www.larsen-b.com/Article/201.html http://www.larsen-b.com/Article/201.html#comments Mon, 18 Apr 2005 22:05:30 +0000 admin Continue reading →]]> After the omnidirectionnal antennas, and the can-antenna, here comes the new one:

http://www.brest-wireless.net/albums/AntenneQuads/dsc01296.sized.jpg
http://www.brest-wireless.net/albums/AntenneQuads/dsc01300.sized.jpg
http://www.brest-wireless.net/albums/AntenneQuads/double_biquad2.sized.jpg

This is a biQuad, and a double-biQuad antenna. You can find the construction guide (in Fr) here.

As usuall the photos is in the Brest-Wireless gallery

The small one is about 11/12db .. and the biggest one: ~ 14db !!

Update: Fix links

]]> http://www.larsen-b.com/Article/201.html/feed 22 Wifi can-antenna ;) http://www.larsen-b.com/Article/199.html http://www.larsen-b.com/Article/199.html#comments Tue, 05 Apr 2005 08:21:35 +0000 admin I decide to launch a new wireless antenna collection. Here is my new homemade one.

http://www.brest-wireless.net/albums/AntenneRicore/nescafe1.sized.jpg
http://www.brest-wireless.net/albums/AntenneRicore/nescafe2.sized.jpg

You can discover all photos here, and the construction guide

]]> http://www.larsen-b.com/Article/199.html/feed 1 Homemade Omnidirectionnal Wifi Antenna http://www.larsen-b.com/Article/195.html http://www.larsen-b.com/Article/195.html#comments Sat, 19 Feb 2005 00:00:57 +0000 admin Continue reading →]]> Once again, i tested several wireless design.

The spider

The spider is a simple to do (really), quarter wave omni-directional antenna. The cost: a female N :) Beside this antenna doesn’t have any gain, it prove to be really usefull, mainly for wardriving because it’s small, and offer really better performance than the default PCMCIA builtins (because it’s a omni and this is very good for out-door use)

http://www.brest-wireless.net/albums/AntenneSpider/spider_1.sized.jpg

French reader can read the complete story of this spider. Original design can be found here. Another trick, i don’t use a 32 mn line but 0.95 * 32 ~ 30 mn

The 6db one

This one require a little more job. The design came from gumph website. In fact the main issue with this one is to cut the parts at the good size. I made a 8 parts one, and give me ~ 6db. I will add 4 others soon. More infos can be found here

http://www.brest-wireless.net/albums/AntenneOmni/omni_jkx_1.sized.jpg

The full photo album is on the Brest Wireless photo gallery.

]]> http://www.larsen-b.com/Article/195.html/feed 2 SD15 Antenna at Home http://www.larsen-b.com/Article/191.html http://www.larsen-b.com/Article/191.html#comments Mon, 31 Jan 2005 15:49:32 +0000 admin Yes, I added a new SD15 at home

http://www.brest-wireless.net/albums/Node_Jkx/dsc01170_003.sized.jpg

Check out this if you want some photos

]]> http://www.larsen-b.com/Article/191.html/feed 3 Homemade Wifi Antenna ? http://www.larsen-b.com/Article/190.html http://www.larsen-b.com/Article/190.html#comments Sat, 22 Jan 2005 21:42:40 +0000 admin Continue reading →]]> I never do that before, but some guys give me this really fancy antenna.

http://www.brest-wireless.net/albums/AntenneCornet/cornet_usam_1.sized.jpg
http://www.brest-wireless.net/albums/AntenneCornet/cornet_usam_2.sized.jpg

Check out Brest Wireless photo album for more infos

Update: I tested this last night. In fact the gain of this beautifull antenna
is around 17dB. Yes ! 17dB for a homemade antenna is pretty high, no ? I really like this stuff

Update 2: Please check other post for additionnal infos about homemade antennas

– Enjoy wireless at home ;)

]]> http://www.larsen-b.com/Article/190.html/feed 20 Wifi Antenna TRENDNet TEW-IA040 http://www.larsen-b.com/Article/168.html http://www.larsen-b.com/Article/168.html#comments Sat, 09 Oct 2004 13:43:43 +0000 admin Continue reading →]]> I just receive my new wifi antenna :) I fact, I’m currently using my NetGear WG311 as a AP, this works pretty fine, but the signal is a bit low in some part of my home. I decided to buy a small antenna to have better signal.

http://www.larsen-b.com/static/tew-ia040.gif

This one is a omni antenna, with 4dBi, with a SMA connector, and a 1 meter cable.

Beside, this one isn’t really a big antenna.. it works really greater than the default antenna (shipped w/ the WG card)

]]> http://www.larsen-b.com/Article/168.html/feed 1