Author :
Nakano, H. ; Okuzawa, S. ; Ohishi, K. ; Mimaki, H. ; Yamauchi, J.
Author_Institution :
Coll. of Eng., Hosei Univ., Koganei, Japan
fDate :
11/1/1993 12:00:00 AM
Abstract :
A radiation element, designated as a curl antenna, is proposed for a circularly polarized antenna. The radiation characteristics of the curl are numerically analyzed. The gain is approximately 8.4 dB, and the 3-dB axial ratio criterion is 6.7%. Two aspects of curl array antennas are also presented: a decoupling factor between two curls and a circular array antenna consisting of 168 curls. Calculations show how the decoupling factor depends on the relative rotation angle of the two curls. The 168-curl array antenna shows a high aperture efficiency of 95%
Keywords :
antenna arrays; antenna radiation patterns; electromagnetic wave polarisation; receiving antennas; 3-dB axial ratio; 8.4 dB; 95 percent; aperture efficiency; circularly polarized antenna; curl array antennas; decoupling factor; gain; radiation characteristics; radiation element; rotation angle; Antenna arrays; Aperture antennas; Conductors; Coplanar waveguides; Current distribution; Helical antennas; Patch antennas; Polarization; Satellite broadcasting; Spirals;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
