Automated RSE Test System Using Stirrer and Turntable
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Solution Overview
Problem
Current radiated spurious emission (RSE) test methods are time-consuming, require large test spaces, and are costly, limiting their applicability in high-speed development of wireless communication products, especially when testing up to 40 GHz.
Innovation Solution
A high-speed RSE automated test system integrating a test chamber with a turntable, movable stirrers, and automated software that simulates semi/fully anechoic chamber environments, using a computer and spectrum analyzer to reduce measurement time through controlled signal stirring and rotation, enabling efficient RSE testing between 1~40 GHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional RSE test methods (DFF, IFF, or radiative near field test) are used, then measurement accuracy can be maintained, but measurement time becomes excessively long (up to several weeks for 40 GHz testing)
Solution Approach 1:
The patent introduces a turntable that rotates the device under test to multiple angular positions and movable stirrers that dynamically change position to create varying electromagnetic field conditions. This dynamic approach allows the system to gather comprehensive measurement data through multiple configurations, achieving accurate RSE measurements while significantly reducing test time compared to static traditional methods
Solution Approach 2:
The patent creates a simulated anechoic chamber environment within a compact test chamber using electromagnetic wave absorbing materials and reflective surfaces configured to mimic free-space conditions. This copying of the ideal measurement environment enables accurate RSE measurements without requiring the large space and time of actual anechoic chambers
2Reliability
If fully anechoic chamber is used for RSE test, then measurement environment is close to free space with reduced interference, but cost and test space requirements become excessively high
Solution Approach 1:
The patent applies electromagnetic wave absorbing materials selectively to specific surfaces within the compact test chamber, and configures reflective surfaces in particular positions, to create localized zones that simulate free-space conditions. This targeted approach achieves reliable RSE measurements without requiring the entire chamber to be fully anechoic, thus reducing space requirements while maintaining measurement quality
Solution Approach 2:
The patent changes the electromagnetic parameters of the test chamber environment by introducing absorbing materials and configured reflective surfaces, transforming the chamber from a standard enclosed space into one that simulates anechoic conditions. This parameter modification enables reliable measurements in a compact space rather than requiring a large fully anechoic chamber
3Measurement precision
If IFF test with multiple point tests is performed, then RSE measurement can be achieved, but test time remains long and batching test in production lines is not applicable
Solution Approach 1:
The patent implements automated continuous measurement by programming the turntable to rotate through multiple positions and the stirrers to move systematically, with the receiving antenna continuously scanning and recording data throughout the sequence. This continuous automated process eliminates the need for manual multiple point tests and enables batching test capability for production lines while maintaining measurement precision
Solution Approach 2:
The patent incorporates automated control systems that manage the turntable rotation, stirrer positioning, antenna scanning, and data acquisition without manual intervention. The system self-manages the complete measurement sequence, enabling unattended operation and batching test capability that improves productivity while maintaining accurate RSE measurements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system significantly reduces measurement time by up to 90% compared to traditional methods, allowing for faster evaluation and analysis of RSE signals, thus supporting the high-speed development of wireless communication products.
Implementation Method 1
The movable stirrers are used to stir the signal of the DUT by changing the position thereof so as to simulate the measurement environment of semi/fully anechoic chamber
Implementation Method 2
One sides of the receiving antenna faces the turntable in order to receive the RSE test signal from the DUT
Implementation Method 3
the turntable is configured to rotate according to the operation mode selected based on a measurement requirement to adjust the direction of the DUT
Implementation Method 4
the fully anechoic chamber can reduce the interference, caused by external electromagnetic waves, to test signals
Implementation Method 5
the semi anechoic chamber uses a conductive floor, which will generate electromagnetic wave reflecting paths
Data Source
AI summary
A high-speed RSE automated test system includes a RSE test chamber and a computer. The RSE test chamber includes a turntable disposed therein and a DUT is disposed on the turntable. The RSE test chamber further includes a receiving antenna configured to receive a RSE test signal from the DUT. The RSE test chamber further includes a movable stirrer configured to simulate the measurement environment of semi/fully anechoic chamber. The computer is connected to an I/O control box configured to control the movable stirrer and the turntable. The computer is further connected to a filter switch box configured to transmit the RSE test signal to a spectrum analyzer to obtain a measured value. The computer includes a test module with all necessary parameters for the RSE test and the test module is configured to generate an integrated test result.