Spiral antennas
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The radiation fields of the Archimedes spiral are derived by approximating the spiral with a series of semicircles. The calculated patterns are shown to have excellent correlation with experimentally determined patterns. It is shown that the high-frequency limit is determined by the feed configuration and that the low-frequency limit occurs when the outside diameter is a little greater than a half wavelength.
Published in:
Antennas and Propagation, IRE Transactions on
(Volume:8
,
Issue:
3
)
Date of Publication: May 1960