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Flat Panel WIFI - RF Cafe Forums

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distantcoder
 Post subject: Flat Panel WIFI
Posted: Sun Dec 11, 2005 12:52 am 
 
Lieutenant

Joined: Sun Dec 11, 2005 12:39 am
Posts: 1
I was looking for a simple PCB flat panel design that I could make at home does anyone know of any blueprints or exacting measurements or layouts for a 2.4 ghz wifi?

I would really appreciate any links or pointers on making my own

Thanks, I have done some searching but seeing as I am new to this I am having a hard time.

I have build my own biquads and cantennas but I really want to try a high gain flat panel :)

Thank you

distantcoder


 
   
 
wsemajb
 Post subject:
Posted: Thu Jan 26, 2006 6:24 pm 
 
Captain

Joined: Wed Nov 02, 2005 1:50 pm
Posts: 11
distancoder,
I did search this topic but missed yours. I've just asked the same question.
I'm astonished that this info isn't plastered all over the web. I can't find anything either. Have you had any luck yet?


 
   
 
sag
 Post subject:
Posted: Fri Apr 07, 2006 9:52 am 
 
Captain

Joined: Wed Apr 05, 2006 3:34 pm
Posts: 6
what gain woul'd you like to get from you antenna?


 
   
 
fred47
 Post subject: 2.4 GHz flat panel antenna
Posted: Fri Apr 07, 2006 8:39 pm 
 
General
User avatar

Joined: Wed Feb 22, 2006 3:51 pm
Posts: 104
Hi!

One of the reasons you don't find such designs plastered all over the internet is that the common PCB material (G-10 or equivalent) is quite lossy at 2.4 GHz, and the good stuff (like Rogers makes) is both a bit hard for a hobbyist to get his hands on, and a bit spendy.

There are designs for colinear antennas on the web.

Good Luck!
Fred


 
   
 
nubbage
 Post subject: Flat Panel WiFi
Posted: Thu Apr 13, 2006 7:13 am 
 
General
User avatar

Joined: Fri Feb 17, 2006 12:07 pm
Posts: 218
Location: London UK
Two gold mines for patch antennas for 2.4GHz are IEEE Microwave Theory and Techniques Antennas & Propagation, and the IEE Antennas and Propagation. A good technical library will have copies.

For antenna designs fairly near 2.4GHz you can always scale the dimensions.

You can also forget about the dielectric material and air-mount strips of copper sheet on plastic pillars, and the bandwidth performance actually improves with air compared to dielectric support.

Another thought to avoid expensive low-loss substrates if you are cooking one at home, polystyrene sheet is readily available, as it is used to create some packaging. Ferero Rochet chocolate spheres come packaged in quite a good material. Google for self-adhesive copper foil for the elements, and a good tech library for the publications mentioned above.


 
   
 
bill sacks
 Post subject:
Posted: Sun May 14, 2006 4:25 am 
 
Lieutenant

Joined: Sun May 14, 2006 4:20 am
Posts: 1
A quick test of a material for use as a 2.4 GHz subsrate is to just put in a microwave oven-- if the styrofoam melts or gets warm, it will be a lossy sustrate material.
bill


 
   
 
archer
 Post subject:
Posted: Thu Oct 19, 2006 1:00 pm 
 
Lieutenant
User avatar

Joined: Wed Aug 09, 2006 10:49 am
Posts: 4
Location: Northern Illinois
Bill,
The first person I have heard this from was a low observable electromag engineer. You are only the second.

_________________
Tony


 
   
 
archer
 Post subject:
Posted: Thu Oct 19, 2006 5:06 pm 
 
Lieutenant
User avatar

Joined: Wed Aug 09, 2006 10:49 am
Posts: 4
Location: Northern Illinois
I should also add that, when I advise people of this, they look at me funny.

_________________
Tony


 
   
 
nubbage
 Post subject:
Posted: Tue Oct 31, 2006 8:05 am 
 
General
User avatar

Joined: Fri Feb 17, 2006 12:07 pm
Posts: 218
Location: London UK
I found a very good design in Microwave Journal Jan 2000

Wen-Shan Chen "A Novel Broadband Design of a Printed Rectangular Slot Antenna for Wireless Applications"






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