Comments on: HOWTO: make a simple and cheap Yagi antenna for wifi applications

By: Brian

Brian — Sat, 23 Jan 2010 01:26:05 +0000

Hello, I have your exact yagi set-up that you have but i am unsure how to connect the wireless Adapter to the driving element. I tried but it didnt work for me. Im a little confused. ok thank you, Brian

By: Jeff Liebermann

Jeff Liebermann — Sat, 12 Dec 2009 00:33:18 +0000

The antenna is a clone of the MFJ-1800 yagi. The problem with this design is that it’s really 200 ohm impedance, not 50 ohms. I needs a 4:1 balun to work properly. See: http://802.11junk.com/jeffl/antennas/mfj1800/

for a reverse engineered model of the MFJ-1800. Also, the original dimensions are archived at: http://web.archive.org/web/20080611022024rn_1/www.andrewhakman.dhs.org/yagi/

By: Jeff Liebermann

Jeff Liebermann — Sat, 12 Dec 2009 00:29:43 +0000

The antenna is a clone of the MFJ-1800 yagi. The problem with this design is that it’s really 200 ohm impedance, not 50 ohms. I needs a 4:1 balun to work properly. See:

for a reverse engineered model of the MFJ-1800. Also, the original dimensions are archived at:

By: nico

nico — Fri, 30 Oct 2009 12:31:20 +0000

Hi Ashkan,
I am not sure I have those available anymore. Sorry! You might be able to check out a book at library on Yagi design that has dimensions in units of wavelength, so you can take a particular design and adapt it to the frequency range you need.

By: Ashkan

Ashkan — Fri, 30 Oct 2009 07:36:14 +0000

Great article…..thanks!

I’m wondering if you can post the dimensions (or the PDF plan) here.

By: nico

nico — Mon, 03 Aug 2009 12:35:45 +0000

Hi Nicahlos, You only need to connect the driven element as described. You connect this loop or dipole to the location of the chip antenna on the linksys. This is a really dirty way of doing it since it is tough to see how much power actually gets sent to the element without proper tools. Don’t forget to compute the required cable length so you have minimal signal refiections.

By: Nicahlos

Nicahlos — Sun, 26 Jul 2009 02:58:33 +0000

I have a wifi usb device how do I hook it up when making a yagi antenna? when making the yagi antena do I connect all the elements to together and how do connect them to the usb wifi device?

By: Ribeiro

Ribeiro — Thu, 18 Jun 2009 15:00:29 +0000

PDF link broken, can anyone share ?

Thx

By: albert

albert — Wed, 17 Jun 2009 00:27:10 +0000

finish the antenna yet

By: jjsasha

jjsasha — Tue, 10 Mar 2009 02:51:09 +0000

hello… i just bought a usb belkin N wireless adapter (it picks up G also) it has no external antenna but i found a video showing how to soldier 1 wire on the circuit board inside as an extra antenna. i havent done it yet.

here’s what im shooting for. i put the usb belkin in a coffee can and i have a Marriot with 9 unsecured connections 1 block away and but im only getting 1 bar on each connection that shows.

my question is can i hook up the end of the 1 soldiered wire from the belkin to a Yagi that i will make or will i need 2 wires from the belkin to the Yagi??? also can anyone point me to a site with a USB adapter to the Yagi ? has anyone even done that? metalgearsasha@gmail.com