Exponential Horns

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Following on from this thread

http://www.satellites.co.uk/forums/...ur-own-satellite-dish-diy-instructions-2.html

this thread is about the mathematics and practical application for the exponential horn design.

The mathematics is actually quite simple, with just three variables required to provide the dimensions of a suitable design base.

For low frequencies, such as general accoutics in loudspeaker design

_http://www.quarter-wave.com/Horns/Horn_Physics.pdf

and for the higher frequencies, microwave and light

_http://www.ece.mcmaster.ca/faculty/nikolova/antenna_dload/current_lectures/L18_Horns.pdf
 

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The ultimate in low frequency application for the home

_http://www.passdiy.com/pdf/KleinHorn.pdf
 

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Not exponential design, but one of the first journals where the horn antenna was used for microwave frequency stuff

_http://www.microwaves101.com/downloads/Slayton/William%20Slayton%20Electronics%201955.pdf
 

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11GHz operation at 45dB gain (equivalent to a good 2.0m parabolic antenna)

_http://www.macpassradio.com/pages/15676.htm

1800 lbs though, without the mounting tower :eek:

And a link to one of the sites using them for (non satellite) broadcast/reception

_http://www.engineeringradio.us/blog/2009/07/cold-war-relic-att-long-lines-microwave-site-kingston-ny/
 
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