Multiport Network Analyzer Calibration Unit Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multi-port network analyzers face challenges in verifying calibration due to complex and error-prone cabling, especially with T-checkers, which fail to detect cabling errors in two-port analyzers using switchable impedances, leading to incomplete verification.
Innovation Solution
A method and calibration unit that utilize the same calibration standards for verification by interchanging connections between the calibration unit and network analyzer, requiring complete detachment and reconnection of jack connections to detect cabling errors, ensuring a complete verification of calibration parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If T-checkers are used for verification of multi-port network analyzers, then verification can be performed, but the procedure becomes very awkward and susceptible to error due to many screw connections
Solution Approach 1:
The calibration unit is designed to serve dual purposes: it functions as a calibration standard during calibration procedures and as a verification standard during verification procedures. This eliminates the need for separate T-checkers and reduces the number of connections required, thereby improving both reliability and ease of operation.
Solution Approach 2:
The patent merges the calibration unit and verification standard into a single integrated device. By combining these functions, the patent eliminates the need for separate T-checkers and reduces the number of screw connections required, making the verification process less awkward and less susceptible to connection errors.
2Ease of operation
If the same calibration standards are used for verification without interchanging connections, then verification is simpler, but cabling errors such as interchanged connections or faulty electrical connections cannot be detected
Solution Approach 1:
The patent applies inversion by interchanging the connections of the calibration unit to the network analyzer ports during verification. Instead of maintaining the same connection configuration, the calibration unit connections are swapped, which allows detection of cabling errors that would otherwise go undetected if the same connections were used.
Solution Approach 2:
The verification process provides feedback about the correctness of cabling connections by measuring transmission and reflection coefficients with interchanged connections. If cabling errors exist, the verification measurements will reveal discrepancies, providing feedback that allows operators to correct connection errors.
3Reliability
If complete verification is implemented by detaching and reconnecting jack connections, then all parameters including cabling faults can be detected, but the process becomes more time-consuming
Solution Approach 1:
The calibration unit serves multiple functions including calibration, verification, and error detection all in one device. This eliminates the need for separate verification equipment and reduces the overall time required for complete verification by consolidating functions into a single unit that can be quickly reconfigured.
Data Source
AI summary
The described method and calibration unit are used to verify the calibration of a multiport network analyzer which uses a calibration unit for calibration, the unit having a plurality of calibration ports corresponding to the number of measuring ports of the network analyzer, whereby different calibration standards, especially idle, short-circuit, adaptation or through-connection stands can be connected to the calibration ports. According to the inventive method, the calibration ports of the calibration unit art interchanged with the measuring ports of the network analyzer in such a manner that one calibration standard of the calibration unit each which is different from the one used in the previous calibration process is connected to every measuring port of the network analyzer.