Title :
Consideration on radiation from an unbalanced-mode spiral antenna
Author :
Nakano, H. ; Igarashi, T. ; Suzuki, R. ; Iitsuka, Y. ; Yamauchi, J.
Author_Institution :
Coll. of Eng., Hosei Univ., Koganei
Abstract :
This paper describes the radiation from an unbalanced-mode two-arm spiral antenna, where the antenna arms are defined by the Archimedean spiral function. The input impedance, current distribution, radiation pattern, axial ratio, and gain are investigated. The investigation reveals that the unbalanced-mode spiral radiates a circularly polarized wave over a wide frequency range as the balanced-mode spiral.
Keywords :
antenna radiation patterns; spiral antennas; Archimedean spiral function; axial ratio; current distribution; gain; input impedance; radiation pattern; unbalanced-mode spiral antenna; Arm; Circuits; Coaxial components; Directive antennas; Feeds; Frequency; Impedance matching; Magnetic analysis; Polarization; Spirals;
Conference_Titel :
Antennas, Propagation and EM Theory, 2008. ISAPE 2008. 8th International Symposium on
Conference_Location :
Kunming
Print_ISBN :
978-1-4244-2192-3
Electronic_ISBN :
978-1-4244-2193-0
DOI :
10.1109/ISAPE.2008.4735179
