Rosenberger Unveils Mini-Coax Connectors for eVTOL Avionics

Post by : Amit

A New Milestone in eVTOL Avionics Connectivity
As the race toward electric vertical takeoff and landing (eVTOL) aircraft intensifies, the spotlight has shifted from propulsion to another vital piece of the equation—avionics. On July 18, 2025, Rosenberger, a global leader in RF, fiber optic, and high-speed interconnects, introduced a breakthrough cabling solution: a lightweight Mini-Coax high-speed connector series engineered specifically for eVTOL avionics and flight control applications.

The launch signals Rosenberger’s strategic entry into one of the fastest-growing segments in aerospace—Urban Air Mobility (UAM). These compact, high-speed connectors are already making their way into the latest electric jet prototype from Lilium, a German eVTOL pioneer. According to sources familiar with the integration, the new Mini-Coax connectors are powering radar, flight control, and mission-critical communication modules onboard Lilium’s fifth-generation demonstrator.

Miniaturization Meets Performance: Up to 20 Gbps Transfer Rates
One of the primary design challenges in eVTOL development is balancing high-speed data communication with stringent weight constraints. In this regard, Rosenberger’s Mini-Coax connectors deliver an optimal solution. The series supports data rates up to 20 Gbps, a critical performance metric for avionics tasks such as sensor fusion, autonomous navigation, radar imaging, and real-time telemetry.

Traditional coaxial assemblies used in commercial aircraft often add substantial weight and space to the airframe. By contrast, Rosenberger’s new series offers a 40% weight reduction over legacy coax solutions. This translates directly into extended range, improved energy efficiency, and reduced thermal loads—all of which are essential for all-electric vertical flight systems operating in constrained urban environments.

Built for Harsh Aerospace Conditions
Reliability under stress is non-negotiable in the aerospace sector. Rosenberger’s Mini-Coax series has been tested and certified to meet the rigorous standards of DO-160G—a critical benchmark that assesses environmental conditions such as temperature, vibration, humidity, lightning, and electromagnetic interference.

The connectors incorporate a specialized vibration-resistant locking mechanism, engineered to withstand the unique G-forces and motion profiles of vertical flight, including rapid climbs, lateral gusts, and mid-air tilts. Unlike traditional RF connectors that can degrade under cyclic loads, Rosenberger’s locking interface ensures sustained signal continuity over the entire operational lifecycle.

This is particularly vital in applications like radar altimetry, obstacle detection, and autonomous takeoff and landing systems—where signal noise, dropouts, or transient disruptions can jeopardize both passenger safety and aircraft certification.

Application in Lilium's Next-Gen Electric Jet
Lilium’s decision to incorporate Rosenberger’s Mini-Coax connectors into its newest prototype speaks volumes about the performance and aerospace readiness of the product. The electric jet—designed to carry up to seven passengers with a top range of 250 kilometers—is currently in advanced pre-certification trials with EASA.

Insiders at Lilium confirm that the connectors are being used across a wide array of subsystems, including digital flight control, redundant telemetry buses, and high-bandwidth radar links. The system's modular design also allows for redundancy layering, meaning multiple Mini-Coax connectors can be daisy-chained to create fail-safe pathways in the aircraft’s fly-by-wire architecture.

Lilium’s CTO, Dr. Remo Gerber, noted in a statement: “Avionics systems in electric jets demand more than just speed. They need weight optimization, reliability, and environmental durability. Rosenberger’s Mini-Coax connectors tick every box.”

Future-Proofing Urban Air Mobility Infrastructure
While the Mini-Coax series is debuting on piloted eVTOL aircraft, Rosenberger is designing with the future in mind. The connector system has been optimized for both human-operated and autonomous UAM platforms, positioning it as a universal standard across next-generation aerospace applications.

Urban Air Mobility platforms—especially those aimed at full autonomy—require dense sensor networks and seamless data fusion between onboard systems, edge processors, and ground control units. This demands a cabling infrastructure capable of ultra-low latency and electromagnetic immunity. Rosenberger’s Mini-Coax series addresses these criteria while maintaining a compact profile that fits into ultra-slim fuselage and wing structures.

The system’s impedance control, shielding integrity, and low insertion loss characteristics also make it suitable for future upgrades, such as 6G aerial communication modules and AI-powered radar systems—technologies expected to define the second wave of eVTOL innovation.

Sustainability and Certification Alignment
Aviation regulators worldwide are beginning to enforce stricter guidelines not only on aircraft performance but also on the sustainability of components used in airframes. Rosenberger has aligned its manufacturing processes for the Mini-Coax series to meet RoHS, REACH, and AS9100D quality management standards.

The series uses halogen-free insulation and low-emission materials, ensuring compliance with fire resistance and toxicity limits. These characteristics are essential for certification under upcoming EASA and FAA frameworks, especially for commercial eVTOLs entering urban airspace where cabin safety and emission profiles are under heightened scrutiny.

Industry Reactions and Expert Commentary
The aerospace connector industry has responded positively to Rosenberger’s entry into the eVTOL avionics segment. Dr. Stefanie Mertz, an avionics systems researcher at the Technical University of Munich, called the launch “a significant step toward normalizing high-speed, lightweight interconnects in compact airframes.”

“Weight remains the enemy of electric flight. Any solution that offers a measurable performance boost with a substantial weight reduction is a game-changer,” Mertz stated.

Similarly, industry analyst Ravi Talreja of Aerospace WireTech Global remarked, “Rosenberger’s Mini-Coax series fills a critical niche in the avionics supply chain. It’s not just about raw bandwidth—it’s about survivability in extreme dynamic conditions. That’s what makes this launch relevant beyond just Lilium or Germany.”

Strategic Market Positioning and Global Potential
With Urban Air Mobility markets expected to surpass $35 billion globally by 2030, Rosenberger’s early positioning in this sector could yield long-term gains. The Mini-Coax series is expected to roll out in modular configurations across other aerospace projects in the United States, South Korea, Japan, and the United Arab Emirates—all of which have announced aggressive plans for eVTOL integration into their public transport systems.

Rosenberger has confirmed it is in talks with several Tier 1 avionics suppliers and eVTOL OEMs across North America and Asia for pilot integration studies. The company is also participating in the EUROCAE Working Group 105, which focuses on standards for electric and hybrid VTOL aircraft—suggesting that Rosenberger is committed not only to product development but also to regulatory leadership.

Enabling Safer, Lighter, Smarter Flight
Rosenberger’s launch of the Mini-Coax connector series is more than a product debut—it’s a strategic contribution to the architecture of future air mobility. As eVTOL aircraft inch closer to commercial reality, the supporting systems behind them—connectors, cables, avionics, sensors—must evolve in parallel to meet new standards of weight, speed, and reliability.

With its blend of performance, safety, and environmental resilience, Rosenberger’s Mini-Coax series is poised to become a foundational element in the avionics wiring ecosystems of tomorrow’s electric skies. From radar integration to autonomous flight logic, these connectors aren’t just transmitting data—they’re shaping the next generation of urban aviation.

Rosenberger, Mini-Coax Connectors, eVTOL, Avionics