Title :
A dipole-fed multi-polarization spiral antenna including a coaxial feeding element
Author :
Matsunaga, Motoshi
Author_Institution :
Dept. of Electr. & Electron. Eng., Ehime Univ., Matsuyama, Japan
Abstract :
A multi-polarization spiral antenna including a transforming element from coaxial cable is presented in this paper. The spiral antenna radiates circularly and linearly polarized waves simultaneously at three bands. Moreover, the antenna does not need an impedance converter and balun, even though it is fed by using a coaxial cable. In this paper, the return-loss characteristics and radiation patterns of the antenna are delineated for showing that the antenna not only can be fed directly by a coaxial cable without any baluns and impedance converters but also can be used in a GPS band as well as mobile bands.
Keywords :
antenna feeds; antenna radiation patterns; baluns; coaxial cables; dipole antennas; impedance convertors; multifrequency antennas; polarisation; spiral antennas; GPS band; antenna radiation patterns; balun; coaxial cable; coaxial feeding element; dipole-fed multipolarization spiral antenna; impedance converters; mobile band; return loss characteristics; transforming element; Antenna radiation patterns; Coaxial cables; Dipole antennas; Feeds; Spirals; GPS; loop antennas; mobile phones; multi-frequency; multi-polarization; small antennas; spiral antennas;
Conference_Titel :
Antennas and Propagation (EuCAP), 2013 7th European Conference on
Conference_Location :
Gothenburg
Print_ISBN :
978-1-4673-2187-7
Electronic_ISBN :
978-88-907018-1-8
