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#1
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"Dale Parfitt" wrote:
A rough esrtimate tells me an array of 4000-8000 1 wavelength dipoles could achieve this. Heh. I'd like to see the phasing harness! |
#2
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Not likely. Such an array would be about twenty wavelengths wide (and still
have reasonable side lobes). It is improbable that one could keep the required elements' current close enough in phase to be able to realize a 2.5 degree beamwidth. Too expensive. If used on a path that is longer than something like 10Mm, the narrow beam will occasionally miss the target (unless one adds skewing, which would be expensive in this case). In other words, a SW broadcast system would not want such an antenna. Less expensive and more reliable to buy a larger transmitter. Why do you ask? Mac N8TT -- J. Mc Laughlin; Michigan U.S.A. Home: "Max Power" wrote in message ... Has anyone ever designed a SW transmission system using curtain arrays that has a beamwidth of 2.5 to 5 degrees? Most standard curtain arrays [HR 4/4/1 to 12/6/1] have 15 to 30 degrees of beamwidth. |
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