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Spiral antennas

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1 Author(s)
Curtis, W. ; Boeing Airplane Company, Seattle, WA, USA

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 )