62
Far from obsolete, copper remains the backbone of de - fense electronics, indispensable for power distribution and critical control signals. Its all-terrain mechanical robustness and straightforward maintenance make it the safe choice for core system architectures. However, when mission requirements demand massive data rates or drastic weight reduction, the laws of phys- ics eventually catch up with metal, pushing engineers toward alternatives for data transport. The importance of ruggedized transceivers Electrical-to-optical conversion is the critical point. Rather than using standard commercial off-the-shelf (COTS) components, military applications rely on rugge- dized transceivers soldered directly onto the PCB. This eliminates fragile intermediate connectors and brings optical conversion closer to the processor, preserving signal integrity at the source. “ Electrical-to- optical conversion is the critical point
• Intrinsic mechanical robustness. Metal is ductile; glass is brittle. Historically, copper connectors offer superior resilience to mechanical vibration and repeated thermal shocks. That’s why these interconnect “classics” remain the default choice for mission-critical functions. • Ease of maintenance. Repairing a copper contact in the field is a well-mastered operation using standard tools, whereas fiber splicing requires a controlled environment.
Copper’s versatility enables hybrid configurations (signal, power, coax) within proven modular connectors such as CMM, simplifying PCB architectures. Decision guide: when to favor each technology Choosing between copper and fiber should never be arbitrary. The table below outlines typical scenarios to guide system architects.
Criteria
Favor Copper if… Short reach (< 10 m) or short backplane links Below 10 Gb/s (copper can go higher over very short runs) Low risk or heavy shielding acceptable Required (combined power & signal)
Favor Fiber if…
Distance
Long distance, inter-system links, or along the fuselage Above 10 Gb/s, HD video streams, raw radar data High-interference environments (radar, EW) or stealth required
Data Rate
EMI Environment
Power
No power needed (data only) Modular maintenance (full cable replacement) planned
Maintenance Frequent field
repairs with basic tools
Modern optical transceivers are designed to withstand shock and vibration while ensuring immediate signal conversion.
Powered by FlippingBook