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4hv.org :: Forums :: General Science and Electronics
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One antenna to rule them all...

1 2 
Move Thread LAN_403
Daniel Uhrenholt
Fri Nov 20 2009, 09:55PM Print
Daniel Uhrenholt Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
Hi all.

It has been a long time since I've been on the forum, because of stress at work and other things...

Finn Hammer encouraged me to post some pictures of the latest project at work, so here you go:-)

In the last two and a half month I have been working on a antenna array with some of the
electronic engineers at work. It is 16 Quard-Ridged Horn antennas with a frequency range of 700 MHz - 6 GHz, placed in a sphere shaped form. They are used by the University to do some measurements for the next generation of mobile communication, as they are working on this at the moment:-)


1258753360 125 FT0 Antenne2


1258753276 125 FT0 Antenne1


1258753228 125 FT0 Antenne

Traffic crash to the left, antenna to the right:-)

I designed the set-up and antennas in Solid Works, and made all of the antennas on our CNC machine.:-) We did not do the maths for the antennas, Denmark's biggest computer did this for us:-)

Okay, I promised my boss that if I use the pictures I took on the internet, I'd had to link to the section that is doing this research... Link2

Cheers, Daniel

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Proud Mary
Sat Nov 21 2009, 12:39AM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Wonderful stuff, Daniel!

UWB antenna design is one of the most creative areas of RF engineering at the moment, and you are lucky to have a part in it,

Stella. smile
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doctor electrons
Sat Nov 21 2009, 02:45AM
doctor electrons Registered Member #2390 Joined: Sat Sept 26 2009, 02:04PM
Location: Milwaukee Wisconsin
Posts: 381
No matter how you slice it, that is one hell of piece of artwork if nothing else. If one were like myself (inclined) to think about how much work goes into anything that complex; would be astonished! Whether that thing catches complex radio waves or looks really good on your coffee table its an accomplishment. I can admit that i don't know that much about rf antennas but i have years of machining experience and that my friend, is impressive.
Fantastic work. Don't ever stop doing jobs like that and i will never be mad at you wink
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Carbon_Rod
Sat Nov 21 2009, 08:47AM
Carbon_Rod Registered Member #65 Joined: Thu Feb 09 2006, 06:43AM
Location:
Posts: 1155
Interesting,
the cluster probably partitioned more than a few nodes to model this design.


What is the gain in 1.2 to 2.3 GHz?

How stable is it with temperature changes?


Bird prevention measures would seem to be ready too....
=)
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Daniel Uhrenholt
Sat Nov 21 2009, 09:11AM
Daniel Uhrenholt Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
Thanks for the comments, it was a pain in the A** to make:-) But this stuff is what I do on daily basis, and it is exiting and fun.

Carbon Rod,

I don't have the calibration report or the simulation papers here at home, so I can't give you any reply on this before Monday morning...

Cheers, Daniel
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Dave Marshall
Sat Nov 21 2009, 05:30PM
Dave Marshall Registered Member #16 Joined: Thu Feb 02 2006, 02:22PM
Location: New Wilmington, PA
Posts: 554
I...I think I just had a nerdgasm.

Daniel, how much do I have to pay to get you to smuggle one out of the lab for me?

-Dave
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rp181
Sat Nov 21 2009, 05:36PM
rp181 Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
that is AWESOME.
Those don't even look like antennas, I would think it was a sculpture if not for the LED's.
I love the texturing you did.
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Mads Barnkob
Sun Nov 22 2009, 09:11AM
Mads Barnkob Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
I am one impressed man!

Get me in! :)
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Bored Chemist
Sun Nov 22 2009, 09:58AM
Bored Chemist Registered Member #193 Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
My mum wouldn't be impressed because it won't pick up BBC Radio 4. (That's 198 KHz for those who are unfamiliar with UK radio stations)
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Steve Conner
Sun Nov 22 2009, 10:10AM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
That antenna looks awesome, Daniel! shades

I once made a Tesla coil whose resonant frequency turned out at 198kHz. It made an excellent antenna for Radio 4.
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