Title :
Effects of metal fences on the scan performance of a large dipole array
Author_Institution :
Hughes Aircraft Co., Fullerton, CA, USA
Abstract :
A theoretical method of investigating the scan characteristics of an infinite dipole array in the presence of thin metal fences along the H-plane is presented. The analytic approach is to determine the current distribution in the unit cell, so that the active impedance of the element can be computed. This was accomplished by using the moment method and imposing the boundary conditions on the tangential electric field on the dipole and the metal fence. It was found that for a given element spacing and dipole geometry there is an optimum fence height at which the E-plane performance can be most improved.<>
Keywords :
antenna phased arrays; dipole antennas; electric impedance; scanning antennas; E-plane performance; active impedance; analytic approach; antenna array; boundary conditions; current distribution; electric field; impedance; infinite dipole array; large dipole array; metal fences; optimum fence height; scan performance; Aircraft; Boundary conditions; Current distribution; Distributed computing; Geometry; Green´s function methods; Impedance; Moment methods; Mutual coupling; Periodic structures;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115201
