Anechoic Chamber Shared Wall for Shielding Testing
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Solution Overview
Problem
Existing measurement systems face challenges in reliably testing the shielding effectiveness and dielectric properties of objects, especially at higher frequencies due to multi-path scattering and high measurement errors caused by metal enclosures and narrow-band high-Q resonators.
Innovation Solution
A measurement system comprising an anechoic chamber assembly with two separately formed chamber portions and an intermediate shared wall with absorber material on its surfaces, which reduces multi-path reflections and allows for cost-effective testing of shielding effectiveness and dielectric properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a probe is placed inside the device under test to test shielding effectiveness at frequencies above 3 GHz, then measurement capability is improved, but multi-path scattering and high measurement errors occur due to metal enclosure and near-field boundaries
Solution Approach 1:
The anechoic chamber is divided into a first chamber portion and a second chamber portion separated by an intermediate shared wall. This segmentation allows the measurement system to avoid placing the probe inside the metal enclosure, thereby eliminating multi-path scattering and near-field boundary issues while maintaining measurement capability through the shared wall structure.
Solution Approach 2:
The intermediate shared wall acts as an intermediary structure between the two chamber portions. It provides a controlled interface for electromagnetic wave transmission while being surrounded by absorber material, enabling accurate shielding effectiveness measurements without direct probe insertion into the metal enclosure.
2Measurement precision
If narrow-band high-Q resonators are used to test dielectric properties, then measurement precision is improved, but device complexity and cost increase due to requiring mechanically tunable resonators or multiple individual resonators
Solution Approach 1:
The anechoic chamber assembly with the intermediate shared wall serves as a universal measurement platform that can test both shielding effectiveness and dielectric properties. By using the same chamber structure with absorber material for both measurement types, the system eliminates the need for multiple specialized resonators, reducing complexity while maintaining measurement precision.
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 provides reliable and cost-efficient measurements by minimizing multi-path reflections and avoiding the need for multiple high-Q resonators, thereby reducing measurement errors and improving testing accuracy.
Implementation Method 1
The first surface and the second surface both comprise absorber material. Inner walls of the first chamber portion and inner walls of the second chamber portion comprise absorber material.
Data Source
AI summary
The present disclosure relates to a measurement system for testing an object, including an anechoic chamber assembly with a first chamber portion and a second chamber portion. An intermediate shared wall is located between the chamber portions that encompass a first space and a second space. The intermediate shared wall has a first surface orientated towards the first space and a second surface orientated towards the second space. The intermediate shared wall has an opening that provides a passage between the spaces. The surfaces include absorber material. Inner walls of the chamber portions comprise absorber material. The opening in the intermediate shared wall defines a mounting portion for the object. Further, a method of testing an object by using the measurement system is described.