OTA Test Chamber Airstream Diffusor for Uniform Thermal Bubble
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Solution Overview
Problem
Inhomogeneous air distribution within thermal bubble components of existing over-the-air (OTA) test chambers leads to significant temperature differences and increased time required for achieving temperature changes during device under test (DUT) testing, reducing measurement performance.
Innovation Solution
The OTA test chamber incorporates an airstream diffusor at the air inlet to diffuse and distribute air evenly within the thermal bubble component, promoting turbulence and optimizing air circulation, which can be adjusted for specific testing purposes, along with a rotatable DUT positioner and RF transparent dome for efficient temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air is supplied into the thermal bubble component without diffusion, then the air circulation system is simple, but the air distribution becomes inhomogeneous leading to significant temperature differences and increased test time
Solution Approach 1:
An airstream diffusor is introduced as an intermediary component between the air inlet and the thermal bubble component. The diffusor receives air from the air inlet and distributes it evenly throughout the thermal bubble component, preventing inhomogeneous air distribution and reducing temperature differences without requiring complex circulation systems
Solution Approach 2:
The airstream diffusor creates locally optimized air distribution by directing airflow to different regions of the thermal bubble component. This ensures homogeneous air distribution throughout the entire volume, eliminating temperature differences in specific areas and improving overall test efficiency
2Speed
If air is supplied rapidly into the thermal bubble component, then temperature changes occur faster, but the air distribution becomes inhomogeneous causing temperature differences
Solution Approach 1:
The airstream diffusor acts as a mediator that receives rapid airflow from the air inlet and transforms it into evenly distributed airflow throughout the thermal bubble component. This allows fast temperature changes while maintaining temperature uniformity by preventing localized air accumulation
Solution Approach 2:
The airstream diffusor changes the flow parameters of the supplied air by diffusing it into multiple directions and distributing it evenly. This transforms the airflow from a concentrated, rapid stream into a distributed flow pattern that achieves fast temperature changes without creating temperature differences
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
This solution significantly reduces the time required for temperature changes within the thermal bubble component, enhancing measurement performance by ensuring uniform temperature distribution and rapid temperature profile achievement.
Implementation Method 1
an airstream diffusor provided at the air inlet and adapted to diffuse an airstream supplied by the air inlet within the thermal bubble component
Implementation Method 2
optimized air circulation within the thermal bubble component
Implementation Method 3
An inhomogeneous distribution of air circulating within the thermal bubble component can lead to significant temperature differences
Data Source
AI summary
An over the air, OTA, test chamber for testing at least one device under test, DUT, provided within the OTA test chamber which includes a thermal bubble component adapted to receive the device under test, DUT, comprising an air inlet adapted to supply air into the thermal bubble component, an air outlet adapted to remove air from the thermal bubble component and an airstream diffusor provided at the air inlet and adapted to diffuse an airstream supplied by the air inlet within the thermal bubble component.