Parallel-Frequency RF Measurement for Faster DUT Characterization
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Solution Overview
Problem
Existing RF system characterization methods require lengthy measurement times due to the need for numerous successive measurements with different signals, particularly in characterizing Ethernet cables where several hundred 4-port measurements are necessary, adding up to several dozen minutes or even hours.
Innovation Solution
A measurement device that generates at least two test signals in parallel with different frequencies, utilizing forward and reverse couplers to simultaneously measure response signals in amplitude and phase, allowing for parallelized measurements across multiple frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If numerous successive measurements with different signals are performed to characterize the DUT, then measurement precision is improved, but measurement time increases significantly
Solution Approach 1:
The patent combines multiple successive measurements into a single parallel measurement setup. Multiple test signals at different frequencies are generated simultaneously and fed through the DUT, with response signals captured in parallel. This merging of multiple sequential measurements into one parallel measurement setup reduces measurement time while maintaining comprehensive characterization coverage.
Solution Approach 2:
The patent transitions from time-domain sequential measurements to frequency-domain parallel measurements. Instead of measuring one signal at a time across multiple time steps, the system simultaneously measures multiple signals at different frequencies in the frequency domain, effectively adding a dimensional approach that reduces measurement time while preserving measurement precision.
2Productivity
If multiple test signals are generated and measured in parallel, then measurement time is reduced, but device complexity increases
Solution Approach 1:
The measurement device is designed with multi-functional capabilities to handle multiple test signals simultaneously. The signal generator can produce multiple frequency signals, the couplers can handle multiple signal paths, and the measurement unit can process multiple response signals in parallel. This universal design enables parallel measurement while managing system complexity through integrated functionality.
Solution Approach 2:
The patent introduces couplers as intermediary components that facilitate parallel signal measurement. The forward coupler and reverse coupler act as mediators that selectively forward test signals and response signals to the measurement unit, enabling parallel processing while organizing the signal flow in a manageable manner that reduces overall system complexity.
Data Source
AI summary
The present disclosure relates to a measurement device for characterizing a device-under-test, DUT. The device includes an RF signal generator to generate test signals in parallel. The test signals each have a different frequency. A signal path connects the RF signal generator to a port of the measurement device. The port is connected to the DUT. The signal path feeds test signals to the port and receives response signals of the DUT from the port. The device includes a measurement unit; a forward coupler connected to the signal path and forwards at least a part of each of the test signals to the measurement unit; and a reverse coupler is connected to the signal path and forwards at least a part of the response signals to the measurement unit. The measurement unit simultaneously measures the forwarded parts of the test and response signals, each in amplitude and phase.