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

Volume

1

fYear

2004

fDate

20-25 June 2004

Firstpage

831

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2004. IEEE

Print_ISBN

0-7803-8302-8

Type

conf

DOI

10.1109/APS.2004.1329799

Filename

1329799