Title :
Analysis of a cavity-backed coaxial array of ring-slot antennas
Author :
Nikolic, N. ; Kot, J.S.
Author_Institution :
Div. of Radiophys., CSIRO, Epping, NSW, Australia
Abstract :
An integral equation solution for a cavity-backed coaxial array of ring-slot antennas is described. A solution for the unknown magnetic currents in the slots is found by a moment-method technique. It is assumed that the slot gaps are narrow and the azimuthal current component is dominant, but no assumption is made about the thickness of the dielectric substrate. After the currents are determined, the input impedance and the far-field radiation pattern are calculated. The generation of shaped and scanned beams is described.
Keywords :
antenna radiation patterns; aperture antennas; electric impedance; integral equations; loop antennas; method of moments; slot antenna arrays; azimuthal current component; cavity-backed coaxial array; dielectric substrate thickness; far-field radiation pattern; input impedance; integral equation solution; magnetic currents; moment method; narrow slot gaps; ring-slot antennas; scanned beams; shaped beams; Antenna arrays; Antenna radiation patterns; Circuits; Coaxial components; Dielectrics; Green´s function methods; Impedance; Integral equations; Magnetic analysis; Magnetic fields;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1995. AP-S. Digest
Conference_Location :
Newport Beach, CA, USA
Print_ISBN :
0-7803-2719-5
DOI :
10.1109/APS.1995.531003
