Voltage Limiter Module With Segmented Line for Broadband ESD Protection
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Solution Overview
Problem
Existing voltage limiter structures for electronic structures fail to provide reliable overvoltage protection while maintaining a high bandwidth, leading to potential damage from electrostatic discharges.
Innovation Solution
A voltage limiter module with positive and negative voltage limiter units, utilizing transmission lines with alternating impedances and diode configurations to manage voltage thresholds, ensuring protection across a wide frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage limiter structures are used to protect electronic structures from overvoltages, then reliability of overvoltage protection is improved, but bandwidth of the measurement instrument deteriorates
Solution Approach 1:
The transmission line is divided into multiple sections with alternating high and low impedances, creating a segmented structure that flattens resonance modes and maintains broadband performance while providing voltage limiting protection
Solution Approach 2:
Different sections of the transmission line are assigned different impedance values (high and low alternating sections) to locally optimize the voltage limiting characteristics across different frequency ranges, achieving overall broadband protection
2Ease of manufacture
If transmission line impedance is made uniform, then ease of manufacture is improved, but transmission characteristics deteriorate due to resonance modes
Solution Approach 1:
The transmission line is segmented into alternating high and low impedance sections, which can be implemented by varying the trace width in discrete segments, balancing manufacturing simplicity with performance optimization
Solution Approach 2:
Local variations in transmission line impedance are introduced only where needed to flatten resonance modes, while maintaining uniform characteristics in other regions, optimizing the balance between manufacturing ease and transmission performance
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 module effectively protects electronic structures from overvoltages up to 8 kV and maintains high bandwidth from DC to 54 GHz, enhancing transmission characteristics by flattening resonance modes.
Implementation Method 1
a positive voltage limiter unit that is configured to limit a positive voltage portion on the transmission line to a threshold
Implementation Method 2
a negative voltage limiter unit that is configured to limit a negative voltage portion on the transmission line to a threshold
Implementation Method 3
a transmission line connecting the first port and the second port
Implementation Method 4
transmission characteristics are enhanced over the relevant frequency spectrum due to the plurality of transmission line sections having different impedances. More precisely, it has turned out that resonance modes in the transmission characteristics are flattened
Data Source
Figure 1~2
Figure 3~4b
Figure 5
AI summary
A voltage limiter module (14) for limiting a voltage applied to an electronic structure is described. The voltage limiter module (14) comprises a first port (36) being connectable to a device under test. The voltage limiter module (14) further comprises a second port (38) being connectable to the electronic structure. The voltage limiter module (14) comprises a transmission line (40) connecting the first port (36) and the second port (38). The voltage limiter module (14) comprises a positive voltage limiter unit (48) that is configured to limit a positive voltage portion on the transmission line (40) to a threshold. The voltage limiter module (14) further comprises a negative voltage limiter unit (46) that is configured to limit a negative voltage portion on the transmission line (40) to a threshold. Further, a directive module (18) and a measurement instrument are described.