Radiating coaxial cable having groups of spaced apertures for generating a surface wave at a low frequencies and a combination of surface and radiated waves at higher frequencies
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United States of America Patent
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Sep 18, 2001
Grant Date -
N/A
app pub date -
Dec 8, 1998
filing date -
Dec 8, 1998
priority date (Note) -
Expired
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Abstract
A radiating coaxial cable includes an inner conductor, an electrical insulator located about a periphery of the inner conductor, and an outer conductor located about a periphery of the electrical insulator. The outer conductor defines groups of apertures spaced from each other a predetermined distance in the range of from about twice the longest operational wavelength of the cable to less than ten meters. The aperture groups are designed in such a way to excite a surface wave at low operating frequencies and a combination of surface and radiating waves at high operational frequencies.
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