Cylindrical coordinates FD-TD analysis of cylindrical microstrip GPS antennas for ships

Author

Morita, N. ; Hata, S. ; Kazama, Y. ; Teshirogi, T.

Author_Institution

Chiba Inst. of Technol., Narashino, Japan

Volume

4

fYear

1998

fDate

21-26 June 1998

Firstpage

2040

Abstract

A cylindrical coordinates FD-TD algorithm is developed for analysing antennas whose structure mainly consists of circular and/or cylindrical shapes. The absorbing boundary condition scheme employed is that of Berenger´s (see J. Compt. Phys., vol.114, p.185-200, 1994) PML (perfectly matched layers) algorithm adapted to the cylindrical coordinates. The model for excitation is that of a coaxial line inside which the voltage and current are are calculated by a one dimensional FD-TD method. The algorithm is applied to the analysis of circular polarization cylindrical microstrip antennas (MSA) with a wide hemispherical beam radiation pattern, the GPS antenna for ships. The results agree very accurately with those of the experiment.

Keywords

Global Positioning System; antenna radiation patterns; electromagnetic wave absorption; electromagnetic wave polarisation; finite difference time-domain analysis; microstrip antennas; mobile antennas; ships; Berenger´s PML; D-TD algorithm; absorbing boundary condition; circular polarization; circular shape; coaxial line; current; cylindrical coordinates FD-TD analysis; cylindrical microstrip GPS antennas; excitation model; experiment; perfectly matched layers; ships; voltage; wide hemispherical beam radiation pattern; Algorithm design and analysis; Antenna radiation patterns; Boundary conditions; Coaxial components; Microstrip antennas; Pattern analysis; Perfectly matched layers; Polarization; Shape; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1998. IEEE

Conference_Location

Atlanta, GA, USA

Print_ISBN

0-7803-4478-2

Type

conf

DOI

10.1109/APS.1998.701609

Filename

701609