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Using a small satellite dish as an 11 meter antenna

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Old 01-02-2009, 06:39 PM
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Default Using a small satellite dish as an 11 meter antenna


I have been playing around with this thing to today and i actually got it to work. What i did was drill out the center of a direct TV dish and mounted a 4 foot fire stick antenna there. I have it up about 10 feet right now as i am still working the bugs out but after figureing out the ground for this antenna i have the SWR down to 1.2. It's seems to receive and transmit very well and it is very directional with great rejection which is what i wanted from the start of this little project. The only reason i tried this was out of boredom but i was wondering if any of you have tried something like this.

The reason i posted this here was because most hams like to experiment and i thought that some of you may have tried this in the past.
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Old 01-02-2009, 07:03 PM
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It's an interesting idea. But, how is the SWR? The dish doesn't exactly provide a tuned ground plane for it. Maybe if the dish was bigger? Th next thing you would have to do is put it on a antenna rotor after you work out the bugs...
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Old 01-02-2009, 07:16 PM
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Quote:
But, how is the SWR?
The answer was in the first post. Looks like he did pretty well !

Quote:
after figureing out the ground for this antenna i have the SWR down to 1.2.
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Old 01-02-2009, 07:54 PM
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i did a 10k 27 inch shaft on one of the old stye metal satilite dishes
what 8 or 9 foot across
the dish is on a 14 foot pole to clear the back part of the house
undid the motor and hardware
had the dish looking straight up
mounted the antenna dead center of the dish

swr are flat
talks as recieves pretty good
nothing big and bad with spactacular numbers but it worked
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Old 01-02-2009, 08:11 PM
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CDX-4540 and I pondered using a dish but couldn't figure out how it would work. Never gave a thought to mounting an antenna in the center .
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Old 01-02-2009, 08:17 PM
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All the dish is doing is providing a groundplane and nothing more. You will not see any gain nor directivity with it. Any directivity seen is a result of a freak null in the pattern. A dish antenna is simply far too small to work on 11m. in fact a six foot dish is too small for even 2m.


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Old 01-02-2009, 09:01 PM
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Garth, that was why we figured it wouldn't work. But I guess we could have made use of it with a hamstick attached .
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Old 01-03-2009, 03:19 AM
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You might be surprised at what can be 'made' to 'work'. Doesn't say anything about how well it works, or what peculiar characteristics it may have, just that it 'works', sort of. Wanna try different things? Why not! The 'biggy' with that experimenting is that something usually gets torn up, one way or another. If you can't afford to loose it, don't use it. Sort of... Yeah, but it worked!
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antenna engineering, experimental antenna, home made antenna, loop antenna, magnetic loop antenna
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