The FD-TD analysis of aperture antennas using a triplate transmission line structure

Author

Nakano, H. ; Unno, T. ; Nakayama, K. ; Mimaki, H. ; Yamauchi, J.

Author_Institution

Coll. of Eng., Hosei Univ., Tokyo, Japan

Volume

3

fYear

1997

fDate

13-18 July 1997

Firstpage

1538

Abstract

An aperture antenna (APA) is a flat element that radiates a linearly polarized wave. This antenna has been fabricated using a triplate transmission line (TTL). The measured data has shown that the TTL structure with a cavity improves the radiation characteristics. The purpose of this paper is to obtain a theoretical reason why the APA with the cavity improves the radiation characteristics. For this, two APAs are analyzed and compared: one has a flat conducting bottom without a cavity, and the other has a cavity in the bottom plate. Special attention is paid to a comparison of Poynting vectors in the two APAs. The radiation pattern and input impedance are also evaluated and discussed.

Keywords

antenna radiation patterns; aperture antennas; electric impedance; finite difference time-domain analysis; transmission lines; FD-TD analysis; Poynting vectors; aperture antennas; cavity; flat element; input impedance; linearly polarized wave; radiation characteristics; radiation pattern; triplate transmission line structure; Algorithm design and analysis; Aperture antennas; Educational institutions; Impedance; Load flow; Magnetic analysis; Polarization; Probes; Transmission line antennas; Transmission line theory;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1997. IEEE., 1997 Digest

Conference_Location

Montreal, Quebec, Canada

Print_ISBN

0-7803-4178-3

Type

conf

DOI

10.1109/APS.1997.631465

Filename

631465