RF Test System Data Verification via Calibration Comparison
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Solution Overview
Problem
Conventional test systems for RF characteristics of devices under test face challenges in ensuring accurate measurement results due to the inherent RF properties of probes, which are not adequately addressed by existing shielding methods and error compensation techniques.
Innovation Solution
A method for data verification in a test system that includes a main control unit and a probe assembly, utilizing a calibration standard assembly to perform relative comparisons of measured data from multiple testing circuits, with adjustable verification boundaries to ensure data accuracy and compensate for measurement errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shielding structures are placed between circuit components to reduce RF signal impact, then measurement reliability is improved, but device complexity increases
Solution Approach 1:
The patent extracts the verification function from the measurement process by separating calibration standard assembly from device under test, allowing independent verification of measurement system accuracy without adding shielding structures to the main measurement path
Solution Approach 2:
The calibration standard assembly acts as an intermediary between the measurement system and the verification process, providing known reference values that enable data accuracy verification without requiring direct modification of the measurement path with shielding elements
2Measurement precision
If numerical compensation is applied to measurement results, then measurement precision is improved, but loss of information increases due to error quantification requirements
Solution Approach 1:
The patent performs preliminary verification by comparing measured data against known calibration standards before final measurement, ensuring accuracy is confirmed in advance rather than requiring post-measurement compensation that may lose information
Solution Approach 2:
The system implements feedback by using the comparison result between measured data and known standard values to verify measurement accuracy, creating a closed-loop verification process that maintains information integrity
3Measurement precision
If relative comparison verification is performed on measured data, then measurement precision is improved, but measurement time increases
Solution Approach 1:
The patent segments the measurement process into distinct phases: calibration phase where verification boundaries are established, and measurement phase where verification is applied. This segmentation allows efficient reuse of verification boundaries across multiple measurements
Solution Approach 2:
The system performs verification by comparing against predetermined boundaries rather than full re-verification of all parameters, applying partial verification action that maintains precision while reducing time consumption compared to complete re-measurement
Data Source
AI summary
A test system and a method for data verification for the same are provided. The test system includes a main control unit having a control host and an analyzer, and a probe assembly that includes at least one probe-head with probe tips and a cable linked to the analyzer. The probe assembly is configured to contact one of testing circuits of a calibration standard assembly via the probe tips for performing a calibration process. In the method, incident data is inputted to the calibration standard assembly for generating measured uncorrected data, and afterwards the measured uncorrected data can be verified by performing relative comparison on any two sets of the measured uncorrected data.