Abstract
A tangential electric field equation for a wire antenna on a dielectric half-space of relative permittivity ε r is formulated using a finite-difference technique. This equation involves only single-integral calculations and is used to obtain the current distribution of a square spiral antenna. The validity of the current obtained is checked by FD-TD analysis. Based on the current distribution obtained, the radiation characteristics of the spiral are evaluated. It is found that the gain in the dielectric material is larger than that in free space, with a ratio of ε r 1.5 in the broadside directions. As ε r increases, the circularly polarised radiation region bounded by the critical angles in the dielectric becomes narrower and the resistance value of the input impedance becomes lower.
| Original language | English |
|---|---|
| Title of host publication | IEE Proceedings: Microwaves, Antennas and Propagation |
| Pages | 70-74 |
| Number of pages | 5 |
| Volume | 145 |
| Edition | 1 |
| Publication status | Published - 1998 |
| Externally published | Yes |
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Keywords
- Finite-difference technique
- Spiral antennas
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Networks and Communications
Cite this
Square spiral antenna on dielectric half-space : Analysis using an electric field equation formulated by a finite-difference technique. / Nakano, H.; Hirose, Kazuhide; Yamazaki, M.; Yamauchi, J.
IEE Proceedings: Microwaves, Antennas and Propagation. Vol. 145 1. ed. 1998. p. 70-74.Research output: Chapter in Book/Report/Conference proceeding › Chapter
}
TY - CHAP
T1 - Square spiral antenna on dielectric half-space
T2 - Analysis using an electric field equation formulated by a finite-difference technique
AU - Nakano, H.
AU - Hirose, Kazuhide
AU - Yamazaki, M.
AU - Yamauchi, J.
PY - 1998
Y1 - 1998
N2 - A tangential electric field equation for a wire antenna on a dielectric half-space of relative permittivity ε r is formulated using a finite-difference technique. This equation involves only single-integral calculations and is used to obtain the current distribution of a square spiral antenna. The validity of the current obtained is checked by FD-TD analysis. Based on the current distribution obtained, the radiation characteristics of the spiral are evaluated. It is found that the gain in the dielectric material is larger than that in free space, with a ratio of ε r 1.5 in the broadside directions. As ε r increases, the circularly polarised radiation region bounded by the critical angles in the dielectric becomes narrower and the resistance value of the input impedance becomes lower.
AB - A tangential electric field equation for a wire antenna on a dielectric half-space of relative permittivity ε r is formulated using a finite-difference technique. This equation involves only single-integral calculations and is used to obtain the current distribution of a square spiral antenna. The validity of the current obtained is checked by FD-TD analysis. Based on the current distribution obtained, the radiation characteristics of the spiral are evaluated. It is found that the gain in the dielectric material is larger than that in free space, with a ratio of ε r 1.5 in the broadside directions. As ε r increases, the circularly polarised radiation region bounded by the critical angles in the dielectric becomes narrower and the resistance value of the input impedance becomes lower.
KW - Finite-difference technique
KW - Spiral antennas
UR - http://www.scopus.com/inward/record.url?scp=0031997178&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031997178&partnerID=8YFLogxK
M3 - Chapter
AN - SCOPUS:0031997178
VL - 145
SP - 70
EP - 74
BT - IEE Proceedings: Microwaves, Antennas and Propagation
ER -