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Aerospace & Defense

Elevate the performance of your RF systems with the industry’s most reliable, compact, and efficient RF power devices.


RF flies farther with Wolfspeed GaN on SiC.

RF technology advancements are moving wireless systems forward. It’s the backbone of telecommunications and radar for navigation and safety systems across commercial and military aviation, air traffic control, weather services, aircraft-to-satellite communications, space exploration and more. The silicon and gallium arsenide semiconductors that enabled early progress in these fields cannot match the wider bandwidth, higher power density, and higher efficiency delivered by Wolfspeed’s GaN on SiC components.

For increased range and reliability with reduced consumption, keep us on your radar.

Radar and communications systems reach farther and perform longer when designed around our field-tested, high power, wide band-gap devices. How much longer? With an average FIT rate of 8.6 fails per billion hours, Wolfspeed’s GaN on SiC HEMTs deliver a median lifetime of 6800 years.

So many tasks, so many reasons to specify Wolfspeed devices.

A commercial aircraft contains as many as six million parts, thousands of which are electronic devices switching current every second of every flight to safely deliver a billion+ travelers per year. Those numbers have the world’s designers making the switch to Wolfspeed’s lighter, smaller, faster-switching GaN on SiC components.

IFF (Identification Friend or Foe)

This radar-based identification system is routine in commercial and military aviation, yet its operation is anything but. Each aircraft’s unique signature, location and bearing is broadcast in real time to allow controllers to route them safely. Designers have access to an array of silicon-crushing GaN on SiC MMICs, transistors and other Wolfspeed components that enable higher performance in L-band, S-band, C-band, X-band and Ku band radars.

UHF Communications (Voice)

Whether its first responders’ handheld radios, submarine to shore or Earth to space, systems architects know their customers require a reliable, high-efficiency communications link. Wolfspeed’s broad portfolio of proven multi-bandwidth and high-power-density LDMOS FETs and GaN HEMTs deliver high gain and low thermal resistance in a package proven to withstand extremes of heat, cold and moisture.

Satellite Communications and Inflight WiFi

Keeping passengers happy is a priority for air carriers, who need streaming-capable inflight WiFi. At Wolfspeed, our priority is keeping avionics engineers happy. There are smiles all around with high-throughput satellites (HTS) enabled by Wolfspeed technologies, delivering full video bandwidth for multi-carrier streaming - the fastest bits/sec per MHz.

Tactical Collision Avoidance System (TCAS)

As this moment there are over 9,000 aircraft in the air, each being tracked by a TCAS system. Wolfspeed helps keep them separated far more effectively by providing GaN on SiC HEMTs and other radar system components which offer industry-leading power density, higher breakdown voltage, greater thermal conductivity and better object discrimination while consuming less energy. Wolfspeed. It’s the right call for avoiding close calls.

Radar for Weather, Navigation and Air Traffic Control

Awareness of a storm before you can see it was breakthrough technology. Knowing the location, speed, size, density, and direction of that storm much sooner can be life changing. Knowledge is power, especially the knowledge that Wolfspeed’s next-generation GaN on SiC HEMTs drop right into the last gen’s footprint. That gives radar systems and broadband engineers the capability to achieve greater efficiency and higher power density, to detect earlier and with more clarity; all with the best-in-class reliability for which Wolfspeed is known. Available as both packaged devices and bare die, these HEMTs bring advanced capability to radar, EW, ECM and commercial ISM systems.

Air Traffic Control (ATC)

Radar-based ATC systems have routed aircraft through the world’s skies for so long that few travelers give them a second thought. For those working to make these systems more efficient – and safer – it’s the only thought. The backbone of ATC are radio beacons that combine VHF ominidirectional range (VOR) with distance measuring equipment (DRE) which track aircraft by timing the response delay of radio signals with on-board aircraft transponders. As the craft transitions to other airspace after takeoff, control is handed off to long range radar systems operating on other designated frequencies then handed to VHF ATC at the arrival field. Throughout the journey frequencies must be converted (switched) hundreds of times a second to safely maintain a constant location fix. Wolfspeed’s technologies enable the functionality of these various ATC systems required for airplane safety and guidance. From wide bandwidth GaN on SiC transistors to GaN on SiC MMIC power amplifiers, Wolfspeed supports applications that span L, S, C, X and Ku-Band with the smallest, lightest, most efficient and highest performing solutions in the industry with reliability proven by billions of hours in the field.

Distance Measuring Equipment (DME)

Like the VHF ATC, DME functions by timing radio signal delays and allows aircraft to fly safe, accurate departure and approach paths. However, DME is a more precise UHF system which measures the craft’s distance from a ground station as well as its altitude to determine “slant angle”. Combine a thunderstorm or heavy air traffic with a target changing vectors at 600+ knots, and there’s a whole lotta switching going on. The higher switching speeds enabled by Wolfspeed’s GaN on SiC technology deliver exceptionally efficient spacial multiplexing, the simultaneous signal switching (Multiple In, Multiple Out) that’s the MMIC’s superpower. Wolfspeed’s robust SiC-based devices are field-proven to tolerate the extremes of heat and cold and high moisture conditions in which these systems must perform.

Tactical Air Navigation System (TACAN)

TACAN is very similar in function to DME, but is more accurate and is often used for military systems in ground installations, at sea and aboard aircraft. TACAN is typically collocated with civil VOR stations as parts of a network of radar quadrants collectively known as the National Airspace System (NAS). TACAN’s seaborne and airborne systems demand high efficiency and high performance yet have severe restrictions in size and weight. Wolfspeed’s wide bandgap GaN on SiC RF components offer three times the thermal conductivity of a silicon system, allowing devices to run at a much higher voltage and higher power density in components which are about 20% smaller.

Secondary Surveillance Radar (SSR)

SSR interfaces with primary radar to deliver supplemental data from on-board transponders to controllers of commercial, military and general aviation aircraft. The SSR and primary systems differ in frequency to eliminate clutter and interference, and when fitted with Wolfspeed devices, systems engineers can deliver on their promise to maximize safety and detection with the world's most reliable GaN RF transistors and MMIC power amplifiers.

Broad Band and Ultra-Broad Band

The race is on to define “ultra-broadband” as RF engineers seek to create a future state with previously unthinkable capability in digital and wireless technologies, a world empowered by exponentially wider bandwidth. This is a destination reachable only through the vehicle of silicon carbide, and as the only manufacturer that controls 100% of its SiC material supply and fields a broad portfolio of the most powerful, reliable next-generation GaN on SiC RF transistors on the planet, Wolfspeed is ready to deliver what's next.

As the only manufacturer that controls 100% of its SiC material supply and fields a broad portfolio of the most powerful, reliable next-generation GaN on SiC RF transistors on the planet, Wolfspeed is ready to deliver what's next.

Why Wolfspeed RF?

SiC Expertise

Wolfspeed was first to launch a GaN on SiC HEMT (1998), first with a GaN HEMT MMIC grown on SiC substrate and, not coincidentally, first to successfully synthesize silicon carbide, in 1987. Over the last 30 years Wolfspeed has launched multiple generations of the world’s most powerful, energy efficient SiC and GaN on SiC devices for use in high-power RF telecommunications and aerospace applications.


Wolfspeed fields the broadest, most extensive portfolio of next-generation GaN on SiC semiconductors, transistors, Schottky diodes, SIC-based MOSFETs and power modules for broadband, telecom, satellite and L-band, S-band, X-band, C-band, and Ku-band radar RF applications, and now, 5G networks. Further advances in capabilities and efficiencies are frequently brought to market through collaboration with RF applications developers.


As the only vertically integrated semiconductor manufacturer, we control 100% of our SiC material supply. We doubled production capacity 2018 and are on track to double capacity again before the end of 2020. In addition, we’ve committed $1 billion to grow SiC wafer and device production capacity 30-fold by 2024 to deliver the tools needed by RF systems engineers.