Time domain reflectometry (TDR) controlled-impedance testing systems for significantly low impedance applications

The TDR system with ultra-wide traces and balanced multilayer PCBs addresses the challenge of measuring low impedances, achieving accurate and sensitive impedance characterization in high-frequency applications.

WO2026128746A1 Publication Date: 2026-06-18BRILLOUIN ENERGY CORP
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
BRILLOUIN ENERGY CORP
Filing Date
2025-12-11
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Conventional TDR testing systems struggle with accurately measuring significantly low impedances below 10 ohms due to reduced signal-to-noise ratio and difficulty distinguishing very low impedances, especially in less sensitive instruments.

⚗Method used

A TDR controlled-impedance testing system with ultra-wide traces and ultra-low characteristic impedance, utilizing multilayer PCBs with specialized dielectric materials and copper layers, and a testing channel configured to handle impedances less than 10 ohms, employing ultra-wide traces and balanced stack-ups to maintain low impedance across a wide frequency range.

🎯Benefits of technology

Enables accurate and sensitive measurements of ultra-low impedances by improving signal transmission and reducing noise interference, allowing for precise impedance characterization in high-frequency applications.

✦ Generated by Eureka AI based on patent content.

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Abstract

A time domain reflectometry (TDR) controlled-impedance testing system includes one or more ultra-low impedance testing channels (e.g., having a characteristic impedance of less than 10 ohms, or less than 5 ohms, or less than 2 ohms) to couple a test signal to a test target ("device under test"). In one example, the TDR testing system includes one or more printed circuit boards (PCBs) on which at least a portion of the testing channel is implemented. The PCB includes an ultra-wide impedance-controlled trace and one or more return conductors constituting at least a portion of an ultra-low impedance PCB RF transmission line having a characteristic impedance of less than 10 ohms (or less than 5 ohms, or less than 2 ohms).
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