http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/ Engadget Comments for http://www.engadget.com/media/feedlogo.gif http://www.engadget.com en-us Copyright 2012 Weblogs, Inc. The contents of this feed are available for non-commercial use only. Blogsmith http://www.blogsmith.com/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Mar 30th 2007 1:24PMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
I think this is the perfect replacement for the Cantenna. I already have a spare DirecTV dish gathering dust, so why not use it?]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Mar 12th 2007 3:20PMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
Thanks!]]>Mar 28th 2007 6:22PMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
According to the loss stats on the coax's data sheet though, you'll lose almost a whopping 7 dbi of gain over 100 feet of cable....

I wonder how it would work as a roof antenna if you ran hardline? Awesome, I bet.

Although, this could be useful with the previous router in an outdoor box post. In fact, it's perfect!]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
RF coax is not the same as your normal CATV/satellite coax. You can't use SAT coax! You'll damage your gear.

CATV/SAT coax is rated at 75 Ohms of impedance. RF gear requires 50 Ohm cable... Some Radio Shacks still carry it... but places like Home Depot don't.

Just be careful or you'll damage your gear.]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
Does it mean that you no longer need to walk down the street with your Cantenna to find a network?

am I wrong?]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
You couldn't use it *inside* your house and get effective coverage... your walls will eat any signals from far away.

You'll get best results if you stick it high up outside. The higher the better.]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
Allow me to recommend:
The ARRL Antenna Book (click my name for the direct link)]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/What is worse is that people are getting busted for downloading things on p2p networks and bittorrent sites and they only bust them by ip address...how can you get caught if your stealing your neighbors internet from a few blocks away? I wonder how they will deal with this issue in court.]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://wireless.binarywolf.com/parabolic.htm]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
My favorite is the bicircle:
http://www.wikarekare.org/Antenna/bicircle.html

I've build a couple for 802.11b/g using large gauge #6 bare ground wire from Lowes and 6x4 inch 16oz. copper sheet metal from a local sheet metal shop (you might look around for a rain gutter shop... they use similar stuff).

By recalculating the specs you can build one for cell phone boosting (both GSM and CDMA single and dual band).

I currently have one dual-band design on a rooftop mast that pulls in cell signals from miles away. In this case its used for CDMA EVDO access in a mountainous area that normally receives no signal. :)]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
Also be sure to check your local regulations, as a biquad-fed dish is likely to exceed any local maximum EIRP limits...]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Will this work after the copper bowtie turns a pretty shade of petina?

]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/yes this will work perfectly. It might be even possible to use the same bi-quad but simply put it in a sardin can.

If you need a picture of something simple just mail me at info@linkpixels.com

Cheers,
Ries
]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
I oft find myself needing internet @ a friends house in the projects but I can only find one unsecured AP in the dinky range of my built in WiFi.

This page is soooooo getting bookmarked.]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/2 there are LIMITS to the power your allowed to put out by the FCC to protect licensed services (large fines)
3 they dont use just your ip to get ppl for downloading they use a unique hardware address embedded in a persons net card wired and wireless called a mac address every nic has one of its own no two are the same]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Of course sometimes that loss can be benificial say if for example you're exceeding your legal output dB, then losing a little in the cabling can drop it down just enough.

--Praetorian_TMOTC]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
www.manuka.orcon.net.nz

]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
www.manuka.orcon.net.nz

]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/And does it have to be this card http://www.wlanparts.com/product/NL2511CDPLUSEXT2]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
Oh god, now I really want one. But first I'll need to justify getting a car... :)]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
First, is there any way to buy the feedhorn for this type of thing? I don't trust my handyman skills all that much.

Second, I like the idea of sticking the router right up there with the dish. I know the router sends out signal, but will it actually receive it from the antenna? Basically we're talking about inverting the functions of a wireless router- using the antenna to receive and the ports to send out the connection. If I wanted to repeat the wireless signal, I presume I would need 2 Wifi routers?]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/39 a router is a 2 way device to your CARD and back if you get a linksys wrt54g then you can setup 1 tranciever port(antenna connector) to the biquad 1 to an omni and setup 3rd party firmware i sugguest http://www.sveasoft.com/
im not affiliated with them but i do like their feature set also this design is very forgiving also try finding a hamfest in your area they have all kinds of antennas even commercialy made 2.4ghz antennas and yes that is the frequency we are working with]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/thanks
jb
]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/thanks
jb
]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/How do you keep your router from broadcasting back on the 14db antenna all over the neighborhood? I'd like to receive on the biquad and broadcast on the low gain
antenna(s) included with the router... I guess it doesn't matter since my network is secured but isn't 14db a pretty strong signal? I wouldn't want to create too much interference.

Thx,
~ n8]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
i'll thank you post again those pictures... my email is neko.katse@gmail.com if you can send it to me...

Thank and Greetings!]]>Jul 23rd 2007 3:12AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/
thanks
chris537]]>Dec 19th 2005 2:46AMhttp://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/Dec 19th 2005 2:46AM