Divider Reflected Wave Blocking Units Impedance Mismatch
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Solution Overview
Problem
In simultaneous high-frequency signal measurement, impedance unconformity between measurement terminals leads to reflected waves, causing signal level differences and inaccurate measurements due to interference.
Innovation Solution
A divider with reflected wave blocking units, including attenuators and isolators, that reduce the impact of impedance mismatch by blocking and attenuating reflected waves, ensuring consistent signal levels across output terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a divider is used to distribute high frequency signals to multiple measurement terminals for simultaneous measurement, then measurement time is reduced, but impedance unconformity at one terminal causes reflected waves that interfere with other terminals and create signal level differences
Solution Approach 1:
Reflected wave blocking units are introduced as intermediary components between the distribution unit and output terminals. These blocking units specifically target and suppress reflected waves caused by impedance unconformity, preventing them from interfering with other measurement terminals while allowing forward signals to pass through unchanged, thus maintaining both measurement speed and accuracy
Solution Approach 2:
The harmful reflected waves are extracted and separated from the main signal path using reflected wave blocking units. By identifying and removing only the reflected wave component that causes interference, the system maintains the beneficial simultaneous measurement capability while eliminating the precision-degrading effect
2Measurement precision
If reflected wave blocking units are added to suppress impedance mismatch effects, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The divider is segmented into distinct functional modules: a distribution unit for signal splitting and multiple reflected wave blocking units for impedance mismatch suppression. This modular segmentation allows each component to perform its specific function independently, making the overall system easier to design, analyze, and maintain despite the added complexity
3Measurement precision
If attenuation units are used to reduce reflected wave impact, then signal level consistency is improved, but signal loss increases
Solution Approach 1:
Attenuation units are configured to provide partial attenuation specifically targeted at reflected waves rather than complete signal suppression. The attenuation level is optimized to be sufficient to suppress reflected wave interference but not excessive enough to cause significant loss of the main forward signal, achieving a balance between signal consistency and signal strength
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
The solution effectively suppresses the influence of impedance mismatch, reducing signal level differences and measurement errors, enabling accurate simultaneous measurement by blocking reflected waves and adjusting signal levels.
Implementation Method 1
each of the plurality of reflected wave blocking units may include an isolator that transmits only a unidirectional signal directed toward the plurality of output terminals from the distribution unit
Implementation Method 2
the plurality of reflected wave blocking units may respectively include attenuation units (60-1, 60-2, . . . and 60-n) that attenuate a reflected signal
Data Source
AI summary
Provided is a divider capable of accurately evaluating an object to be measured without being affected by impedance of a terminal to be measured of the object to be measured, and a signal generation system. There is provided a divider including an input terminal, a plurality of output terminals, a distribution unit that distributes a high frequency signal input to the input terminal and outputs signals obtained by the distribution, and a plurality of reflected wave blocking units that are respectively connected to a plurality of distribution unit outputs and attenuate reflected waves reflected by sides of the plurality of output terminals. The distribution unit includes the plurality of distribution unit outputs and outputs the high frequency signal distributed from the plurality of distribution unit outputs. Outputs from the plurality of reflected wave blocking units are output from the plurality of output terminals.