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to erkel
Found it!I found a metal shingle at Home Depot for 59 cents. It measures 8" x 12". |
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sweet! Hitting HD in the AM. Thanks! |
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ikarus1 Premium Member join:2002-10-23 Urbanna, VA
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ikarus1
Premium Member
2002-Oct-28 9:44 pm
A little ingenuity goes a very long way... Just a $.99 cookie sheet is all you ever really needed, or an empty Foster's can and a pair of tin snips, or that pringles can the fellow above documents. Get any of those at any corner store and save yourself the drive, or use a nickel's worth of tin foil that was the point, wasn't it? Some people can do something with nothing, other's need consultants (award winning consultants, to boot). -m- » osiris.urbanna.net/anten ··· template[text was edited by author 2002-10-28 21:48:31][text was edited by author 2002-10-28 21:50:53] |
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Anybody know if there's a program like the one in that link for the D-Link DWL-650 wireless pc card? Looks like a cool utility, so I'd like to see what all one can do. |
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ikarus1 Premium Member join:2002-10-23 Urbanna, VA |
ikarus1
Premium Member
2002-Oct-29 9:09 am
said by wildwolf: Anybody know if there's a program like the one in that link for the D-Link DWL-650 wireless pc card? Looks like a cool utility, so I'd like to see what all one can do.
The program used to model that reflector was 4Nec2. It can be found here: » www.qsl.net/wb6tpu/swindex.htmlThe DWL-650 does not have a means to attach an external antenna, so there is very little you might do to improve it's antenna except to modify the card to accept an external antenna. Here is a link on how to do that: » c0rtex.com/~will/antenna/Finally here is another hack of the DWL-650 that worked quite well for me: » osiris.urbanna.net/anten ··· rt_dish/To be quite honest though, I really like the "Kipper Tin" biquad design or a discone design for laptop use. Look at these: Biquad » manuka.orcon.net.nz/wififi.jpg» manuka.orcon.net.nz/wifibowt.gif» manuka.orcon.net.nz/wifibiqd.gifDiscone: Well... I see the only page I knew of that shows how to make one is gone, so I guess that will be then next thing I do on the web site. -m- |
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drjim MVM join:2000-06-13 Long Beach, CA |
drjim
MVM
2002-Oct-29 4:59 pm
Just a comment on Discone antennas....They're really bad! ZERO gain, vertical polarization, and usually multi-octave bandwidth. Good for scanners, and Amateur Radio VHF/UHF when it's all you can put up, but that's about it. drjim |
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ikarus1 Premium Member join:2002-10-23 Urbanna, VA
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ikarus1
Premium Member
2002-Oct-29 11:51 pm
said by drjim: Just a comment on Discone antennas....They're really bad! ZERO gain, vertical polarization, and usually multi-octave bandwidth. Good for scanners, and Amateur Radio VHF/UHF when it's all you can put up, but that's about it. drjim
Yes these things are true. I do believe there is a bit of gain over a dipole but not more than 3 dB. Still running sims. The nicest thing about this antenna (discone) is the fact that you get out pretty nearly what you put in. It is extremly efficient and exhibits a *VERY* low SWR across a 10:1 frequency range. That means one designed for 2.4 GHz will work *EQUALLY* well on 5.8. This antenna is not a good design for PtP work. It is a darn fine design for *REPEATERS* and *INTERCEPT* work, and that means it is an excellent design for a laptop clip on antenna. There is a second design which is good for a clip on but it will not work *BOTH* bands. I will make one of those when time permits... I just built another one today and took pictures. I did the template and will put together a web page on it before next Monday, Ryan... "Check is in the mail." -m- [text was edited by author 2002-10-30 00:03:11] |
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ikarus1 |
to walter3ca4
said by walter3ca4: I found a metal shingle at Home Depot for 59 cents. It measures 8" x 12".
Did you make one? How did it work? -m- |
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ikarus1
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ikarus1
Premium Member
2002-Dec-19 11:06 am
said by ikarus1:
said by drjim: Just a comment on Discone antennas....They're really bad! ZERO gain, vertical polarization, and usually multi-octave bandwidth. Good for scanners, and Amateur Radio VHF/UHF when it's all you can put up, but that's about it. drjim
Yes these things are true. I do believe there is a bit of gain over a dipole but not more than 3 dB. Still running sims.
The nicest thing about this antenna (discone) is the fact that you get out pretty nearly what you put in. It is extremly efficient and exhibits a *VERY* low SWR across a 10:1 frequency range. That means one designed for 2.4 GHz will work *EQUALLY* well on 5.8.
This antenna is not a good design for PtP work. It is a darn fine design for *REPEATERS* and *INTERCEPT* work, and that means it is an excellent design for a laptop clip on antenna. There is a second design which is good for a clip on but it will not work *BOTH* bands. I will make one of those when time permits...
I just built another one today and took pictures. I did the template and will put together a web page on it before next Monday, Ryan... "Check is in the mail."
-m- [text was edited by author 2002-10-30 00:03:11]
Well I was wrong ang Jim was right. The gain on a discone is somewhere about 1 dBi. The radiation pattern looks a whole lot like an apple. Great match, meaning very low SWR but other than that, I have removed the model from the site as I have come to agree with Jim. It's a bad antenna for wireless data purposes. -m- |
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to drjim
Look at these puppiescheck these out..... got a 25% increase of signal strength at 100M...camera can be found at » www.panasonic.com/consum ··· eras.asp |
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