Title :
Natural and metamaterial spiral antennas
Author :
Nakano, H. ; Miyake, J. ; Oyama, M. ; Yamauchi, J.
Author_Institution :
Grad. Sch. of Eng., Hosei Univ., Tokyo, Japan
Abstract :
A low-profile cavity-backed spiral antenna with an absorbing strip exhibits wideband radiation characteristics. An EBG reflector is useful in designing a small spiral for medium frequency bandwidth operation. A modified EBG reflector contributes to mitigation of the partial deterioration of the antenna characteristics in a low-profile equiangular spiral antenna. The circularly polarized radiation from a metamaterial spiral is left-handed at one frequency and right-handed at a different frequency.
Keywords :
broadband antennas; metamaterial antennas; photonic band gap; polarisation; spiral antennas; EBG reflector; absorbing strip; cavity-backed spiral antenna; circularly polarized radiation; low-profile equiangular spiral antenna; metamaterial spiral antennas; partial deterioration; wideband radiation; Broadband antennas; Metamaterials; Periodic structures; Reflector antennas; Spirals;
Conference_Titel :
Antenna Technology (iWAT), 2012 IEEE International Workshop on
Conference_Location :
Tucson, AZ
Print_ISBN :
978-1-4673-0036-0
DOI :
10.1109/IWAT.2012.6178648
