RF Testing Apparatus VSWR Pre-equalization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a lack of radio frequency testing apparatus and methods with voltage standing wave ratio adjustment capable of accurately and efficiently testing devices under test, while compensating for systematic errors in the signal path, cabling, connections, and analog components.
Innovation Solution
A radio frequency testing apparatus and method that includes a signal source for pre-equalizing test signals based on voltage standing wave ratios (VSWR) at the output and/or input, and a signal sink for post-correcting received signals based on VSWR at the input and/or output, thereby compensating for systematic errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional radio frequency testing apparatus is used, then testing can be performed, but systematic errors from signal path, cabling, connections and analog components cannot be compensated, resulting in low measurement precision
Solution Approach 1:
The signal source performs pre-equalization of the test signal based on the voltage standing wave ratio determined at the output, compensating for systematic errors before they affect the measurement. This preliminary action eliminates the need for complex post-processing and differentiation of error sources.
Solution Approach 2:
The tracking generator continuously determines the voltage standing wave ratio at the input and output of the device under test, and the signal source adjusts the test signal accordingly based on this feedback. This closed-loop feedback mechanism enables real-time compensation of systematic errors.
2Reliability
If voltage standing wave ratio adjustment is implemented, then systematic errors can be compensated, but the device complexity increases due to additional components and control mechanisms
Solution Approach 1:
The tracking generator serves multiple functions: it generates the test signal, determines the voltage standing wave ratio at both input and output, and provides feedback for pre-equalization and post-correction. This multi-functionality reduces the need for separate dedicated components.
Solution Approach 2:
The system dynamically adjusts the test signal parameters (amplitude, phase, frequency) based on the determined voltage standing wave ratio. The signal source modifies these parameters in real-time to compensate for systematic errors, improving reliability without requiring complex hardware changes.
3Measurement precision
If pre-equalization and post-correction are performed, then measurement accuracy improves, but the testing time and processing requirements increase
Solution Approach 1:
By performing pre-equalization at the signal source before the test signal enters the device under test, the system eliminates the need for time-consuming post-processing operations. The compensation is done in advance, reducing overall testing time while maintaining high accuracy.
Solution Approach 2:
The tracking generator continuously monitors the voltage standing wave ratio and the signal source continuously adjusts the test signal parameters, ensuring that compensation is maintained throughout the entire testing process without interruption or additional processing delays.
Data Source
AI summary
A radio frequency testing apparatus with voltage standing wave ratio adjustment for testing a device under test is provided. Said radio frequency testing apparatus comprises an input, an output, a signal source for providing a test signal for the device under test via the output, thereby forming an output signal path, a signal sink for receiving a received signal from the device under test via the input, thereby forming an input signal path, and a tracking generator. In this context, the tracking generator and/or the signal sink is configured to determine a corresponding voltage standing wave ratio at the input and/or at the output. Furthermore, the signal source is configured to pre-equalize the test signal on the basis of the corresponding voltage standing wave ratio at the output and/or the input. In addition to this or as an alternative, the signal sink is configured to post-correct the received signal on the basis of the corresponding voltage standing wave ratio at the input and/or the output.