Title :
Generation of a wide circularly polarised wave from a conical-helix antenna
Author :
Nakano, Hisamatsu ; Sato, Mitsuhisa ; Yamauchi, Junji
Author_Institution :
Hosei University, College of Engineering, Koganei, Japan
Abstract :
The optimum pitch and cone angles of a conical-helix antenna are numerically investigated from the viewpoint of widening a circularly polarised beam. It is found that the helices of a cone angle of 5° with pitch angles ranging from 40° to 45° realise a circularly polarised beam over a hemispherical region. It is also found that an antenna height of at least one wavelength is required to maintain a circularly polarised beam of more than 160°.
Keywords :
antenna radiation patterns; antenna theory; radiowave propagation; antenna height; cone angles; conical-helix antenna; hemispherical region; pitch angles; radiation patterns; radiowave propagation; wide circularly polarised wave;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870283
