Title :
A wire inverted F antenna on a finite-sized EBG material
Author :
Nakano, H. ; Asano, Y. ; Yamauchi, J.
Author_Institution :
Coll. of Eng., Hosei Univ., Koganei, Japan
Abstract :
A wire inverted F antenna (WIFA) is a simple, lightweight, low-cost radiation element for radiating a linearly polarized wave. This paper deals with a WIFA above a finite-sized surface, where an electromagnetic band-gap (EBG) material backs the WIFA. This antenna is referred to as the EBG-WIFA. The radiation characteristics are compared with those of a WIFA above a finite-sized perfect electric conductor (PEC-WIFA). First, the effects of the finite-sized PEC plane on the antenna characteristics are analyzed using the FDTD method. Second, the finite-sized PEC plane is replaced with an EBG material. The EBG material in this paper is composed of numerous patches that are mushroom-shaped. It is revealed that the EBG-WIFA and PEC-WIFA exhibit different radiation characteristics. The EBG-WIFA forms a tilted radiation pattern, similar to that for a bent monopole above an EBG material. In addition, this paper presents the frequency response of a representative EBG-WIFA forming a tilted beam.
Keywords :
antenna radiation patterns; finite difference time-domain analysis; frequency response; photonic band gap; wire antennas; EBG material; EBG-WIFA radiation characteristics; FDTD; PEC-WIFA; electromagnetic band-gap; finite-sized EBG surface; finite-sized perfect electric conductor; frequency response; linearly polarized wave; mushroom-shaped patches; tilted beam; tilted radiation pattern; wire inverted F antenna; Conducting materials; Finite difference methods; Frequency; Impedance; Magnetic materials; Metamaterials; Optical reflection; Periodic structures; Time domain analysis; Wire;
Conference_Titel :
Antenna Technology: Small Antennas and Novel Metamaterials, 2005. IWAT 2005. IEEE International Workshop on
Print_ISBN :
0-7803-8842-9
DOI :
10.1109/IWAT.2005.1460984