OTA Test System Antenna Height Reduction via DUT Tilting
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Solution Overview
Problem
Existing spherical over-the-air (OTA) test systems require high spatial dimensions due to large elevation angle ranges, necessitating test rooms or chambers with heights over ten meters.
Innovation Solution
The OTA test system reduces spatial requirements by tilting the device under test by a predefined angle, thereby reducing the maximum necessary elevation angle of the test antenna and the required height of the test system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the elevation angle range to be tested is large, then the measurement coverage is improved, but the spatial requirements (height) increase significantly
Solution Approach 1:
The patent introduces a tilting mechanism for the DUT positioner that adds a rotational degree of freedom around an axis perpendicular to the measurement zone. This allows the device under test to be tilted by a predefined angle, effectively redistributing the elevation angle measurement range across both the antenna positioner and the DUT positioner, thereby reducing the maximum height requirement of the test antenna while maintaining full measurement coverage
Solution Approach 2:
The patent changes the orientation parameter of the device under test by tilting it by a predefined angle. This parameter change allows the measurement elevation angle range to be shifted, enabling the test antenna to operate within a reduced elevation angle range while still covering the required measurement space through the combined rotation of the antenna positioner and tilting of the DUT
Data Source
AI summary
An over-the-air (OTA) test system is described. The OTA test system includes an antenna positioner with at least one test antenna. The OTA test system further including a DUT positioner, wherein the DUT positioner is configured to hold a device under test in a measurement zone. The antenna positioner is configured to rotate the at least one test antenna around the measurement zone by adapting an elevation angle of the test antenna. The DUT positioner is configured to tilt the device under test by a predefined angle with respect to a height direction of the OTA test system, thereby adapting an elevation angle of the device under test. Further, an OTA test method is described.