Title :
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
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;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1997. IEEE., 1997 Digest
Conference_Location :
Montreal, Quebec, Canada
Print_ISBN :
0-7803-4178-3
DOI :
10.1109/APS.1997.631465
