DocumentCode :
2812519
Title :
Near-field investigations to determine the lines of constant phased for an airborne position-finding antenna-system
Author :
Kemptner, E. ; Stein, V.
Author_Institution :
German Aerosp. Res. Establ., Oberpfaffenhofen, Germany
fYear :
1991
fDate :
24-28 June 1991
Firstpage :
1263
Abstract :
A method is presented which makes it possible to calculate the scattered field very close to the surface of a perfectly conducting body as well as the surface itself. The method is based on the representation of the scattered field by an integral over the surface current distribution. The integrand is treated by identical transformations in such a way that the singular terms can be integrated analytically, while the remaining nonsingular terms are integrated numerically. The surface current distribution is determined by the magnetic field integral equation. The theory is validated by experiments by means of the scattered field of a metallic cube with an edge length of a wavelength. The normal and tangential electric near-field of the cube is measured by small probes, and the results are compared with those of the theory. The theoretical results of the near-field distribution of a cube and an airplane are presented using lines of constant phase.<>
Keywords :
antenna radiation patterns; current distribution; integral equations; mobile antennas; radio direction-finding; airborne position-finding antenna-system; lines of constant phased; magnetic field integral equation; metallic cube; scattered field; surface current distribution; Conductors; Current distribution; Electric variables measurement; Integral equations; Magnetic analysis; Magnetic field measurement; Probes; Scattering; Surface treatment; Wavelength measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
Type :
conf
DOI :
10.1109/APS.1991.175078
Filename :
175078
Link To Document :
بازگشت