Modes of the contrawound toroidal helix antenna

Authors
Hansen, RC Ridgley, R
Citation
Rc. Hansen et R. Ridgley, Modes of the contrawound toroidal helix antenna, MICROW OPT, 23(6), 1999, pp. 365-368
Citations number
10
Categorie Soggetti
Optics & Acoustics
Journal title
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
ISSN journal
08952477 → ACNP
Volume
23
Issue
6
Year of publication
1999
Pages
365 - 368
Database
ISI
SICI code
0895-2477(199912)23:6<365:MOTCTH>2.0.ZU;2-Z
Abstract
The contrawound toroidal helix antenna with constant current is examined; i t has an omnidirectional pattern in the toroid plane. Radiation resistance is derived for the dipole mode, and results are validated by moment-method calculations. The radiation es of these antennas are greater than one milli on, making them unsuitable as dipole mode radiators. Ratios of loop-mode to dipole-mode radiation resistances range from several hundred to large valu es. (C) 1999 John Wiley & Sons, Inc.