Wireless Channel Reproduction Structure With Adjustable Mode Agitators
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Solution Overview
Problem
Reverberation chambers for measuring antenna radiation performance are complex to manufacture and require high design accuracy, with challenges in achieving field and spatial uniformity, making them large and costly.
Innovation Solution
A wireless channel reproduction device with a column and wall mode agitator structure, featuring adjustable metal panels to generate multiple lower cut-off frequencies, ensuring field and spatial uniformity, and allowing miniaturization while maintaining measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reverberation chamber is designed to achieve field and spatial uniformity, then measurement accuracy is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The mode agitator is segmented into multiple independent metal panels that can be individually adjusted. Each panel can be positioned at different angles and locations to create diverse electromagnetic modes, replacing a single complex agitator structure with multiple simpler, adjustable components that collectively achieve the same uniformity function.
Solution Approach 2:
The metal panels are made adjustable and reconfigurable rather than fixed. The panels can be dynamically repositioned to optimize electromagnetic field distribution for different measurement scenarios, allowing the chamber to adapt to various test requirements without requiring a completely new design for each case.
2Reliability
If the reverberation chamber is designed with proper field uniformity, then measurement reliability is improved, but the chamber size increases
Solution Approach 1:
The lower cut-off frequencies of the metal panels are carefully controlled and adjusted as key parameters. By optimizing the panel dimensions, materials, and resonant frequencies, the chamber achieves effective mode stirring and field uniformity within a compact volume, rather than requiring a large chamber size for natural mode distribution.
3Manufacturing precision
If multiple mode agitators are added to improve field uniformity, then spatial uniformity is improved, but manufacturing cost and complexity increase
Solution Approach 1:
Instead of adding more complex agitator mechanisms, the invention controls the lower cut-off frequency parameters of existing metal panels. By adjusting panel dimensions, materials, and resonant characteristics, effective mode stirring is achieved through parameter optimization rather than structural complexity, simplifying manufacturing while maintaining spatial uniformity.
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 device provides improved field and spatial uniformity, enabling accurate antenna radiation performance measurements in a compact form, supporting various radio terminals with enhanced stability and reduced manufacturing costs.
Implementation Method 1
parameters of each of the plurality of panel groups may be adjusted, considering natural frequencies of the plurality of panel groups and lower cut-off frequencies generatable by the natural frequencies
Implementation Method 2
a column and wall mode agitator structure, featuring adjustable metal panels to generate multiple lower cut-off frequencies, ensuring field and spatial uniformity
Data Source
AI summary
Provided is a wireless channel reproduction device having a structure of an reverberation chamber. More specifically, the wireless channel reproduction device may minimize a measurement uncertainty by satisfying recommendations on spatial uniformity or field uniformity of a working volume and may be designed as an internal structure of an reverberation chamber including a plurality of mode agitators.