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Design of Modulated End-Fire Antennas

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3 Author(s)
Kirov, G.S. ; Tech. Univ. of Varna, Varna ; Lahr, J. ; Malvetti, M.

The design presented in this article is dedicated to end-fire antennas with a modulated surface-wave structure fed by a dipole or crossed dipole. For short, these are herein called modulated end-fire antennas. The studies were carried out with a modulated corrugated-rod (disks attached to a metal rod) surface-wave structure. The results obtained may be applied to other types of surface-wave structures, such as dielectric on a metal rod or dipole. The length of the investigated antennas ranged between 1.5lambda and 4.5lambda . The increase in directivity obtained was between 5 dB and 3.5 dB, compared to ordinary non-modulated end-fire antennas with the same lengths.

Published in:

Antennas and Propagation Magazine, IEEE  (Volume:49 ,  Issue: 6 )