Methods and apparatus for evaluating radiated performance of MIMO wireless devices in three dimensions

摘要

According to some embodiments, a system is provided for simulating a cluster of reflections. The system includes an array of antenna elements distributed in space over a solid angle having an angular spread. The solid angle is substantially less than a full sphere and each antenna element has a spatial orientation. The system also includes a spatial environment simulator connected to the antenna elements and configured to apply one of excitations to the antenna elements and weights to signals from the antenna elements. The combination of the spatial distribution of the antenna elements, the orientation of the antenna elements, and the weighting applied by the variable path simulator simulates a near field arising from a cluster of reflections of a multipath environment.

主权项

1. A system for simulating a cluster of reflections, the system comprising:
an array of antenna elements distributed in space over a surface having finite curvature and bound by a solid angle having an angular spread, the solid angle covering substantially less than a full sphere, but extending over a region to enable the antennas to simulate a near field environment arising from a cluster of reflections of a multipath environment, each antenna element having a spatial orientation, the antenna elements being mounted on a structure that includes spaced apart arms that emanate from a center of the structure, the spaced apart arms being curved and distributed to position the antenna elements over the surface having finite curvature and bound by the solid angle; and a variable path simulator in communication with the antenna elements, the combination of the spatial distribution of the antenna elements, the orientation of the antenna elements, and weightings applied by the variable path simulator to signals of the antenna elements, causing a simulation of a near field environment arising from a cluster of reflections of a multipath environment.