Title :
Coplanar spiral antenna
Author :
Nakano, H. ; Arao, T. ; Oyanagi, H. ; Yamauchi, J.
Author_Institution :
Dept. of Electron. & Inf., Hosei Univ., Koganei, Japan
Abstract :
A coplanar spiral antenna (CSAT) in free space is analyzed using the finite-difference time-domain method. It is found that the CSAT radiates a circularly polarized wave over a relatively wide frequency range (13%). The gain is found to be an approximately 4.8 dBi. Subsequently, a CSAT with a glass plate is investigated. It is found that impedance matching is achieved by partially removing the conducting areas between the antenna filaments.
Keywords :
finite difference time-domain analysis; spiral antennas; CSAT; coplanar spiral antenna filament; finite-difference time-domain method; impedance matching; Antennas; Bandwidth; Glass; Impedance; Impedance matching; Spirals; coplanar arms; printed antenna; spiral antenna;
Conference_Titel :
Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on
Conference_Location :
Spokane, WA
Print_ISBN :
978-1-4244-9562-7
DOI :
10.1109/APS.2011.5996506
