Lighter, Faster, Smarter: Ethernet Connectivity for LEO Satellite Systems

From global communication and Earth observation to defense and security, Low Earth Orbit (LEO) satellites are helping to transform the way we operate in space. As these next-generation systems continue to develop and grow in capability, there’s a need for equally advanced cabling and connectivity solutions that enable faster, leaner, and smarter data exchange. Highly engineered to operate in space environments, the cabling in these systems must not only be light in weight and small in size, but also high-performance enough to support fast, reliable single-pair Ethernet connectivity.

Aptiv addresses these needs through LiteSPEed™ Cable, a single-pair Ethernet solution designed to meet the stringent performance and reliability requirements of next-generation LEO satellite systems.

The Challenge: Connectivity for LEO Satellites

Situated between 300–1,200 miles (500–2,000 kilometers) above the Earth’s surface, LEO satellites offer numerous advantages over traditional geosynchronous systems, from lower latency to faster download speeds. However, these performance gains also create a unique set of design considerations and constraints, including:

• Weight matters. As every gram of cable weight increases launch cost and decreases available payload capacity, LEO satellite systems need as light a harness as possible.
• Space is at a premium. With limited room to work, satellite harnesses and cables must be designed for easy installation and routing around sharp corners in tightly packed electronic assemblies.
• High-bandwidth data. As satellites handle more and more data in real time, connectivity must support increasingly high bandwidth requirements, making single-pair Ethernet connectivity essential.

With each gram of cable weight and square inch of harness volume costing money and impacting mission capabilities, LiteSPEed™ was designed with these constraints in mind.

How LiteSPEed™ Enables Lighter, Faster, Smarter Satellite Connectivity

Designed for LEO applications from the start, LiteSPEed features a range of attributes that make it ideal for the LEO satellite market, including:

• Single-Pair Ethernet (SPE): LiteSPEed uses a single-pair architecture instead of the 4-pairs required by conventional Ethernet. This results in a solution that is easier to terminate, route, and install – greatly reducing the time and effort required to harness a LEO satellite.
• Compact and lightweight: LiteSPEed is up to 25% lighter and 50% smaller in diameter than conventional Ethernet cables, helping to simplify cable routing, fit into tighter spaces, and free up valuable payload capacity.
• Designed for high-density routing: Thanks to a flexible and robust construction, LiteSPEed cables can be routed around tight corners and high-density routing paths with ease. This reduces stress on harnesses and connectors, helping to maximize available space.
• Data + Power over Ethernet (PoE): By allowing satellites to transmit power and data over a single pair, LiteSPEed eliminates the need for separate power wiring, reducing harness complexity, and reducing weight and size even further. LiteSPEed also supports Power over Ethernet (PoE) to transmit up to 50 watts of DC power over the same cable.
• Future-ready Ethernet solution: Unlike legacy protocols like CANbus, Profinet, or RS-485, LiteSPEed is an Ethernet solution, simplifying integration, removing the need for gateways, and providing a clear technology path forward to meet future mission requirements.

LiteSPEed: The Ideal Solution for Next-Generation LEO Missions

LiteSPEed is an ideal solution for satellite manufacturers and integrators looking to reduce weight, simplify installation, and enable high-bandwidth data exchange in next-generation LEO satellite platforms. Whether those satellites are being deployed for broadband communications, Earth observation, or defense and security applications, the small, lightweight design of LiteSPEed, combined with its ability to carry both data and power over a single cable, can help satellite system designers and integrators to reduce overall system costs, minimize weight, and simplify harness complexity.

Aptiv: Designing the Cabling and Connectivity Solutions of the Future

Aptiv is a world-leading manufacturer and supplier of connectivity solutions for the space industry. LiteSPEed Cable is the latest product in a range of cabling and connectivity solutions designed to help our customers design the technologies of the future by providing them with the cabling and connectivity they need to make it possible.