Title :
A spiral antenna array with an electromagnetic band-gap reflector
Author :
Nakano, H. ; Hitosugi, K. ; Yamauchi, J.
Author_Institution :
Coll. of Eng., Hosei Univ., Koganei, Japan
Abstract :
A v-spiral antenna, whose arms are composed of horizontal and vertical sections, is analyzed using the FDTD method. The radiation characteristics when finite-sized perfect electric conductor (PEC) and electromagnetic band-gap (EBG) reflectors are used to back the v-spiral are revealed. The EBG reflector restores circularly polarized radiation for the v-spiral when the height above the reflector is small. Based on the radiation characteristics of the single v-spiral above the EBG a two-element array is constructed and analyzed. The input impedance of each feed point is found to have a broadband frequency characteristic.
Keywords :
electromagnetic wave polarisation; finite difference time-domain analysis; microwave antenna arrays; photonic crystals; reflector antennas; spiral antennas; EBG reflector; FDTD; circularly polarized radiation; electromagnetic band-gap reflector; feed point broadband frequency characteristics; feed point input impedance; finite-sized PEC reflector; perfect electric conductor; spiral antenna array; v-spiral antenna; Antenna arrays; Arm; Conductors; Electromagnetic radiation; Electromagnetic wave polarization; Feeds; Finite difference methods; Impedance; Reflector antennas; Spirals;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN :
0-7803-8302-8
DOI :
10.1109/APS.2004.1329799
