System for testing multi-antenna devices

摘要

A test system for testing multiple-input and multiple-output (MIMO) systems is provided. The test system may convey signals bidirectionally between two test chambers. Each test chamber may be lined with foam to minimize electromagnetic reflections. Each test chamber may include structure three-dimensional array of test antennas. The test antennas may be mounted in a sphere using an antenna mounting structure. The antenna mounting structure may include multiple rings of different sizes. Test antennas may be embedded in the inner walls of the antenna mounting structure. There may be multiple receiving antennas located in each test chamber. One test chamber may include a device under test inside an array of test antennas and another test chamber may include base station antennas inside another array of test antennas. Signals may be conveyed between the test chambers using channel emulators.

主权项

1. A wireless test system, comprising:
a test chamber; a plurality of test antennas within the test chamber; a plurality of retractable ring-shaped antenna mounting structures on which the test antennas are mounted, wherein the plurality of retractable ring-shaped antenna mounting structures share a common concentric axis, and wherein the plurality of retractable ring-shaped antenna mounting structures comprises ring-shaped antenna mounting structures of different sizes that form a spherical antenna mounting structure; and radio-frequency circuitry coupled to the array of test antennas.