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Author Topic: help!? 1kw 2.4ghz omnidirectional vertical antenna  (Read 1345 times)
UNEASY30746
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Posts: 1




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« on: December 29, 2005, 09:22:20 AM »

can someone help me find plans to homebrew a 2.45 ghz omnidirectional antenna that can handle  1 kw? any help would be very much apreciated
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N3JBH
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« Reply #1 on: December 29, 2005, 04:52:42 PM »

HOLLY CRAP!!! you trying to cook the neighbor hood? i donnt allways make statments like this. may i as bold as to ask why? and what sort a gain you looking for? a slot antenna may work nice for that you can google  that and find results.
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N3JBH
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« Reply #2 on: December 30, 2005, 08:44:02 AM »

here is a really good link to do what you need to do.

http://members.ij.net/packrats/Slot_Antenna/slot.html
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KG6WTF
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« Reply #3 on: December 30, 2005, 01:05:24 PM »

...if you are wealthy enough to afford a 1kw amplifier  on 2.4Ghz, you should hire an engineer to design your antenna ;-)
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KG4RUL
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« Reply #4 on: December 31, 2005, 05:54:25 AM »

And of course you will be doing the required FCC RF exposure analysis BEFORE firing up this open air microwave oven??

Dennis KG4RUL
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N3ZKP
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Posts: 2008




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« Reply #5 on: December 31, 2005, 12:04:07 PM »

And you need to run 1k on 2.4 gHz because ...

73,

Lon - N3ZKP
Baltimore, Maryland
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WILLY
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Posts: 286




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« Reply #6 on: December 31, 2005, 02:23:52 PM »

 by UNEASY30746 on December 29, 2005     

"can someone help me find plans to homebrew a 2.45 ghz omnidirectional antenna that can handle 1 kw? any help would be very much apreciated "

Use the formula  468/freq in MHz = L in feet.

You can make a really little, teeny weeny, itsy-bitsy, tiny dipole.   >g<
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N3ZKP
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Posts: 2008




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« Reply #7 on: December 31, 2005, 09:13:14 PM »

<< You can make a really little, teeny weeny, itsy-bitsy, tiny dipole. >g< >>

I want to watch him connect it to the 1-7/8 hardline. <gg>

73,

Lon - N3ZKP
Baltimore, Maryland
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WA9SVD
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Posts: 2198




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« Reply #8 on: January 01, 2006, 02:43:31 PM »

Wouldn't a 4" longwire work?
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VE6NHZ
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Posts: 15




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« Reply #9 on: January 02, 2006, 04:20:44 AM »

I do have to say, PLEASE make sure that you do an RF analisys and make sure that no one can get near that thing when it's operating!

That being said I know that you are a responsible Ham and that you know these thing... Cheesy

I am curious though, what are you using the extra power for?
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N3ZKP
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Posts: 2008




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« Reply #10 on: January 02, 2006, 06:21:55 AM »

<< That being said I know that you are a responsible Ham and that you know these thing>>

What makes you think this person is a ham? There's no call sign associated with the posting.

73,

Lon - N3ZKP
Baltimore, Maryland
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N4LI
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Posts: 397




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« Reply #11 on: January 02, 2006, 07:38:24 AM »

Could be a troll...

But, I ran the RF exposure calculations, and, surprisingly, it can easily be made to pass, assuming proper access control.

I would not, however, recommend running this in, say, one's attic.

"What's for lunch, Mom?"  

"We're cookin' hot dogs, son.  We're always cookin' hot dogs."

Peter
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WA6BFH
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« Reply #12 on: January 02, 2006, 01:55:02 PM »


You can make a Dipole antenna that will be 2.292 inches
long, tip to tip. If you use .125 inch diameter bazing rod for the elements, it should handle 1 kW Ok!

3333333's dude!
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WA9SVD
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Posts: 2198




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« Reply #13 on: January 02, 2006, 11:16:33 PM »

It's merely a case of "Pigeon in, roast squab out..."
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