Title :
Dual circular polarization of tilted beam by a single arm rectangular spiral antenna
Author :
Jung, Chang Won ; De Flaviis, Franco
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Irvine, CA, USA
Abstract :
A single-arm rectangular spiral antenna has been investigated to obtain dual circular polarization of a tilted beam. The proposed rectangular spiral antenna is printed on a finite size dielectric substrate (εr=3.27) backed by a finite size conducting plane. Spiral arm length (L) is varied from L=0.99λo to L=4.06λo to choose the length that yields the proper axial ratio and gain. L is chosen to be two values: L1=1.05λo and L2=3.35λo. L1 radiates an axial beam and L2 radiates a tilted beam. The spiral radiates right hand circular polarization (RHCP) in its axial beam (L1=1.05λo) due to the winding sense. In addition, the spiral radiates dual circular polarization (RHCP and LHCP) at its tilted beam (L2=3.35λo) in one antenna element.
Keywords :
antenna radiation patterns; electromagnetic wave polarisation; microstrip antennas; spiral antennas; 10 GHz; LHCP; RHCP; axial beam; axial ratio; conducting plane; dielectric substrate; dual circular polarization; printed antenna; radiation gain pattern; radiation pattern; single arm rectangular spiral antenna; tilted beam; Bandwidth; Coaxial components; Computational modeling; Dielectric substrates; Directive antennas; Frequency; Permittivity; Polarization; Spirals; Testing;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN :
0-7803-8302-8
DOI :
10.1109/APS.2004.1329790
