Wireless Device Test Fixture Using PIN Diode Impedance Loading
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Solution Overview
Problem
The existing methods for designing wireless communication devices are time-consuming and resource-intensive, as they require extensive testing in three-dimensional microwave anechoic chambers to evaluate RF circuit performance, and the use of multiple test fixtures further increases the time and resource requirements.
Innovation Solution
A test system utilizing a single test fixture composed of PIN diodes to generate impedances corresponding to different impedance loading areas, allowing for the measurement of RF characteristic sets and determination of optimal impedance loading areas, thereby reducing the need for multiple test fixtures and simplifying the design process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple test fixtures are used to measure different impedance loading areas, then measurement completeness is improved, but device complexity and time consumption increase
Solution Approach 1:
The patent combines multiple test fixtures into a single integrated test fixture that can measure multiple impedance loading areas. The test fixture includes multiple measurement channels that can simultaneously or sequentially measure different impedance loading areas through switching circuits, thereby reducing device complexity while maintaining measurement completeness.
Solution Approach 2:
The single test fixture is designed with multi-functionality to handle multiple measurement tasks. It includes a switching mechanism that can connect different measurement channels to different impedance loading areas, allowing one fixture to perform the work of multiple fixtures while adding the capability to measure various impedance conditions.
2Measurement precision
If extensive chamber testing is conducted to evaluate RF circuit performance, then measurement accuracy is improved, but time consumption and resource requirements increase
Solution Approach 1:
The patent implements preliminary measurement action by using the test fixture to measure impedance loading areas before conducting extensive chamber testing. The test fixture can quickly screen and evaluate RF circuit performance under different impedance conditions, identifying potential issues early in the design process. This preliminary action reduces the need for repeated extensive chamber testing, thereby saving time and resources while maintaining measurement accuracy.
3Measurement precision
If multiple test fixtures are designed and replaced during testing, then measurement coverage is improved, but productivity decreases
Solution Approach 1:
The patent merges multiple test fixtures into a single integrated fixture with multiple measurement channels. This consolidation eliminates the need to design, manufacture, and replace multiple separate fixtures during testing. The single fixture can measure all impedance loading areas through its switching mechanism, significantly improving productivity by reducing fixture replacement operations while maintaining comprehensive measurement coverage.
4Device complexity
If a single test fixture is used to simulate various impedance loading conditions, then device complexity is reduced, but adaptability must be maintained
Solution Approach 1:
The patent implements dynamic adaptability in the single test fixture through switching circuits and control mechanisms. The fixture can dynamically reconfigure its measurement channels to adapt to different impedance loading areas and testing requirements. This dynamic capability allows the fixture to maintain versatility and adaptability while remaining a single integrated device, resolving the contradiction between reduced complexity and maintained adaptability.
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 approach enables initial estimation of RF circuit transmitting and receiving abilities without extensive chamber testing, significantly reducing time and resource consumption in the design of wireless communication devices by using PIN diodes to simulate various impedance loading conditions.
Implementation Method 1
A test fixture is coupled to the power supply for generating impedances corresponding to a plurality of impedance loading areas according to the plurality of voltages generated by the power supply
Data Source
AI summary
A test system for adjusting a wireless communication device by impedance loading features includes a power supply for generating a plurality of voltages, a test fixture coupled to the power supply for generating impedances corresponding to a plurality of impedance loading areas, a test equipment coupled to a test point of the wireless communication device via the test fixture for measuring a plurality of radio frequency characteristic sets of the wireless communication device, and a decision device coupled to the test equipment for determining an optimal impedance loading area of the wireless communication device according to the plurality of radio-frequency characteristic sets.