# An integral equation and its application to spiral antennas on semi-infinite dielectric materials

Hisamatsu Nakano, Kazuhide Hirose, Ichiro Ohshima, Junji Yamauchi

17 引用 (Scopus)

### 抄録

This paper presents an integral equation that can handle wire antennas on a semi-infinite dielectric material. The integral equation is reduced to a set of linear equations by the method of moments. For efficiency, the impedance matrix element Zmn is divided into two parts on the basis of weighted Green's function extractions. The far-zone radiation field, which is formulated using the stationary phase method, is also described. After the validity of the presented numerical techniques is checked using a bow-tie antenna, a spiral antenna is analyzed. The current distribution, radiation pattern, axial ratio, power gain, and input impedance are discussed. It is found that the radiation field inside a dielectric material is circularly polarized. As the relative permittivity of the dielectric material increases, the angle coverage over which the axial ratio is less than 3 dB becomes narrower.

元の言語 English 267-274 8 IEEE Transactions on Antennas and Propagation 46 2 https://doi.org/10.1109/8.660972 Published - 1998 Yes

### Fingerprint

Spiral antennas
Integral equations
Antennas
Directional patterns (antenna)
Method of moments
Set theory
Linear equations
Green's function
Permittivity
Wire

### ASJC Scopus subject areas

• Electrical and Electronic Engineering
• Computer Networks and Communications

### これを引用

An integral equation and its application to spiral antennas on semi-infinite dielectric materials. / Nakano, Hisamatsu; Hirose, Kazuhide; Ohshima, Ichiro; Yamauchi, Junji.

：: IEEE Transactions on Antennas and Propagation, 巻 46, 番号 2, 1998, p. 267-274.

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