Title :
Radiation from a metahelical antenna
Author :
Nakano, Hisamatsu ; Tanaka, Mitsuru ; Yamauchi, Junji
Author_Institution :
Hosei Univ., Koganei, Japan
Abstract :
A novel helical antenna, designated as the metahelical antenna, is proposed, where the helical arm has electromagnetic right-handed (RH) and left-handed (LH) properties. The antenna design process is described. It is found that the metahelical antenna radiates a circularly polarized (CP) wave within two frequency bands. The rotational sense of the CP wave within one of the frequency bands is opposite to that of the CP wave within the other frequency band. The VSWR is less than 2, as desired, when the gain is at the maximum value.
Keywords :
electromagnetic waves; helical antennas; VSWR; circularly polarized wave; electromagnetic left-handed properties; electromagnetic right-handed properties; helical arm; metahelical antenna; radiation; Antenna feeds; Antenna radiation patterns; Dielectrics; Directive antennas; Helical antennas; Reflector antennas;
Conference_Titel :
Antennas & Propagation (ISAP), 2013 Proceedings of the International Symposium on
Conference_Location :
Nanjing
Print_ISBN :
978-7-5641-4279-7
