Posted by dB [ 195.23.136.206 ] on April 14, 2006 at 11:38:36:
In Reply to: Re: Wood hf horn. posted by Wayne Parham on April 13, 2006 at 22:30:29:
Hi,
After paying attention (and learning from it) to some of the work done by Wayne (and others) I found a very interesting Patent (#4,469,921) from Kinoshita, 1984, with a "similar" horn design.
<<Sectoral horn with side walls linear and opening degree or angle of the horn adjusted by the upper and lower curved walls>>
The interest of this is that it explains how a type ""shelf"" frequency response of the horn becomes flat and directivity is improved in the necessary frequency band. With a two angle throat for different frequencies.
Nice.
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