Title :
Extremely low-profile spiral antenna with PEC and EBG reflectors
Author :
Nakano, H. ; Oyanagi, H. ; Igarashi, T. ; Iitsuka, Y. ; Yamauchi, J.
Author_Institution :
Coll. of Eng., Hosei Univ., Koganei, Japan
Abstract :
An extremely low-profile spiral antenna above a PEC reflector does not show wideband antenna characteristics. However, placing ring-shaped absorbing material between the outermost spiral arms and the PEC reflector mitigates deterioration in the antenna characteristics. Further investigation shows that removing absorbing material and replacing the PEC reflector by an EBG reflector contribute to realizing a low-profile antenna with high radiation efficiency.
Keywords :
antenna feeds; antenna radiation patterns; broadband antennas; photonic band gap; reflector antennas; spiral antennas; EBG reflector; PEC reflector; antenna feed; extremely low-profile spiral antenna; high radiation efficiency; ring-shaped absorbing material; wideband antenna characteristics; Arm; Broadband antennas; Frequency; Impedance; Integral equations; Metamaterials; Periodic structures; Reflector antennas; Spirals; Wideband;
Conference_Titel :
Electromagnetics in Advanced Applications, 2009. ICEAA '09. International Conference on
Conference_Location :
Torino
Print_ISBN :
978-1-4244-3385-8
Electronic_ISBN :
978-1-4244-3386-5
DOI :
10.1109/ICEAA.2009.5297609
