Accurate and rapid determination of beam pointing direction and polarization of an antenna using a smart wall

A smart wall containing many dual polarized probes receives the field radiated by an antenna at a distance of about 50 ft. The received voltage from a few probes receiving the strongest fields are used to determine the antenna beam pointing direction and its polarization based on some apriori information on the antenna.

Enhancement of REFARR MoM Reflection Dyad Computer Programs

Design and analysis of a microstrip reflectarray requires the reflection dyad of a doubly periodic infinite array excited by a plane wave. In order to determine the reflection dyad one solves an integral equation for the induced currents in the unit cell patch by the method of moments. The conventional perturbation method for determining the conductor loss in terms of the surface impedance of the metal in the moment method produces diver...

Determine Optimum Search Strategies for Rapidly and Accurately Locating a Beam Pointing Direction

This research will focus on fast and accurate methods of determining beam pointing direction and polarization of an antenna from limited measurements made in the Fresnel region. Initially the antenna aperture size, amplitude distribution, and its phase center will be assumed to be known. The beam pointing angle with respect to the antenna aperture normal is assumed to be known within 5 degrees. We wi...

Analysis of antenna beam pointing accuracy using limited measurements in the Fresnel region

The purpose of this study is to conduct an analysis that quantifies the beam (main lobe) pointing measurement accuracy of a system under test (SUT). The SUT switched-beam pointing tests shall be performed in a chamber in which the measurement probe antennas may be located in the SUT antenna's Fresnel zone (at the highest frequency of interest). The study shall assess candidate beam pointing measurement...