Feature: Automotive system design
Figure 1: A typical PoC application uses bias-T circuits at each end of a coaxial cable to separate DC power from high-speed data signals
increasing the risk of anti-resonance. Managing these interactions requires additional resistors and capacitors, which further increase the component count and design effort. To reduce this complexity, designers
often aim to use fewer inductors. A single, wide-bandwidth inductor minimises the likelihood of anti- resonance effects, improves filtering consistency, and conserves board space – especially important in automotive subsystems, which are meant to kept small and of light weight. However, the difficulty is selecting an inductor with the right mix of impedance,
A single, wide- bandwidth inductor minimises the likelihood of anti- resonance eff ects, improves fi ltering consistency, and conserves board space
frequency response, and other electrical characteristics, particularly challenging since PoC applications have diverse requirements. Powertrain, ADAS and infotainment systems have different mixes of power delivery and data bandwidth demands, and there is considerable variance among application requirements within each of these categories. To address these needs, Murata
has developed a family of inductors engineered explicitly for automotive PoC bias-T circuits. The family encompasses a wide range of performance characteristics, providing designers with the flexibility to meet the needs
Figure 2: The LQW43FT180M0HL is a compact, wide-bandwidth inductor that serves the role of several inductors within automotive PoC bias-T circuits
Figure 3: The LQW32FT2R2M0HL is designed for PoC applications, offering both high power and high data rates
Figure 4: The LQW21FT2R0M0HL supports high-data-rate automotive PoC
www.electronicsworld.co.uk October 2025 19
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