The unidirectional equiangular spiral antenna
Open Access
- 1 October 1959
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 7 (4) , 329-334
- https://doi.org/10.1109/tap.1959.1144707
Abstract
Circularly polarized unidirectional radiation, over a bandwidth which is at the discretion of the designer, is obtainable with a single antenna. The antenna is constructed by wrapping balanced equiangular spiral arms on a conical surface. The non-planar structure retains the frequency-independent qualifies of the planar models, and, in addition, provides a single lobe radiation pattern off the apex of the cone. Practical antennas have been constructed with radiation patterns and input impedance essentially constant over bandwidths greater than 12 to 1 and there is no reason to assume that these cannot be readily extended to more than 20 or 30 to 1.Keywords
This publication has 4 references indexed in Scilit:
- Frequency independent antennasPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Log periodic feeds for lens and reflectorsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- The equiangular spiral antennaIEEE Transactions on Antennas and Propagation, 1959
- EXPERIMENTAL INVESTIGATION OF THE CONICAL SPIRAL ANTENNAPublished by Defense Technical Information Center (DTIC) ,1957