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Old Dec 05, 2012, 12:24 PM
2Vision-Air
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Canada, QC, Blainville
Joined Aug 2009
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Anyone used this from the store, it's a copper sheet in 12x12 made to create circuit, the sheet is made of plastic but the front is a thin copper sheet.

Will this work?
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Old Dec 05, 2012, 12:29 PM
2Vision-Air
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Canada, QC, Blainville
Joined Aug 2009
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Forgot to attach the pictures
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Old Dec 05, 2012, 01:02 PM
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United States, FL, Palm Beach
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I would say absolutely.
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Old Dec 05, 2012, 01:30 PM
The Fixer
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Canada, ON, Milton
Joined Jan 2009
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When your finished making it. Give it a spay of paint or clear to keep it from going green.
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Old Dec 05, 2012, 01:38 PM
Still hackin'
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Port Elizabeth, South Africa
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^^ What he said
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Old Dec 16, 2012, 11:17 AM
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USA, NY, New York
Joined Nov 2008
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Tested mine 2km only so far and works 100% not a single drop of the video strength ! My wife was the test bunny reporting the results.
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Old Dec 20, 2012, 06:59 PM
Can i get a do-over?!?!
JesterKlown77's Avatar
United States, TN, Clarksville
Joined Nov 2012
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Q: Can I use this antenna for a ground-based UGV? Like a FPV rock crawler?
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Old Dec 21, 2012, 07:05 AM
Engineer for Christ
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Amherst, VA
Joined Jun 2006
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A: Certainly.
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Old Dec 28, 2012, 10:57 PM
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OctoQuad CP

May this design works?
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Old Dec 28, 2012, 11:23 PM
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or this one?
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Old Dec 29, 2012, 11:45 AM
Engineer for Christ
IBCrazy's Avatar
Amherst, VA
Joined Jun 2006
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^Your second diagram is it. Take all of your elements and rotate them 45 degrees (in the same direction) for best results as well as a pretty cool look. I have radiation plots and such for this antenna. Plots courtesy of HugeOne

4NEC-2 code:

CM NEC Input File Biquad for 2439 MHz, Pow 20020608 |
CM All data in wavelengths. Scaled to meters with GS |
CM --------------------------[ http://pow.za.net/ ]--'
CE
SY A = .1814' Element dimensions
SY B = A * 2'
SY R = .00317' Wire radius
SY L = R * 2' Gap for soldering to feed
SY H=0.130507' Element height over reflector
SY RX = 1.3' Reflector vertical length / 2
SY RY = RX' Reflector horizontal length / 2
SY RH = .01' Height of reflector sides
SY spacing = 1 'Element spacing
SY para = 0.132
GW 1 10 H .0 L H A A R
GW 2 10 H A A H B .0 R
GX 1 011
GW 9 1 H .0 -L H .0 L R
GM 0 0 45 0 0 0 spacing/2 spacing/2
GM 10 3 90 0 0 0 0 0
SM 12 10 .0 -RY -RX .0 RY -RX
SC 0 0 .0 RY RX
SM 12 3 .0 -RY RX .0 RY RX
SC 0 0 RH RY RX
SM 3 12 .0 -RY -RX RH -RY -RX
SC 0 0 RH RY -RX
GS 0 0 .123
GE 0
EK
FR 0 1 0 0 2440. 0
EX 0 9 1 0 0 -1
EX 0 19 1 0 -1 0
EX 0 29 1 0 0 1
EX 0 39 1 0 1 0
RP 0 73 73 1001 -90. 90. 5. 5. 10000.
EN


-Alex
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Old Dec 31, 2012, 03:50 PM
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United States, NE, Omaha
Joined Nov 2011
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I just finished building the Bi-quad for 910 mHz and was researching to see if a Tupper ware container could be placed over it without impacting performance (found the answer was "shouldn't"). However, I noticed others have the active element shielded all the way to the antenna--I didn't. I used an N connector chassis as basis of the build. Is this a fatal flaw?
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Old Dec 31, 2012, 04:20 PM
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United States, FL, Marco Island
Joined Jan 2007
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My 1280 BQ is in sterilite. 11km and counting. I think Alex said keep a certain distance like a wavelength but I don't remember for sure.
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Old Dec 31, 2012, 04:25 PM
2Vision-Air
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Canada, QC, Blainville
Joined Aug 2009
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Quote:
Originally Posted by 1fullbird View Post
I just finished building the Bi-quad for 910 mHz and was researching to see if a Tupper ware container could be placed over it without impacting performance (found the answer was "shouldn't"). However, I noticed others have the active element shielded all the way to the antenna--I didn't. I used an N connector chassis as basis of the build. Is this a fatal flaw?
I will let Alex correct me, but i think your center conductor will not work like this, the feed starts as soon as it leaves the shield of the cable, so you have 2 element running parallel with each other, that antenna will not give you good result at all.

sorry
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Old Dec 31, 2012, 04:29 PM
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motorhead's Avatar
Kansas, USA
Joined Sep 1999
3,923 Posts
Would he be able to fix it by adding a piece of brass tube in place of the shield? It would be soldered to the connector.
Mike
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