Qorvo Pushes X-Band GaN Power Density Beyond 400% in DARPA Program
Qorvo has achieved more than a 400% increase in X-band GaN transistor RF power density through research funded by DARPA’s THREADS program. Rather than simply increasing transistor output, the project attacks one of high-power RF electronics’ fundamental limitations: heat generated within the transistor itself. Qorvo is combining new materials, device structures and fabrication techniques to reduce thermal resistance and move heat away from the active transistor channel. The Phase I result could ultimately enable substantially higher-power radar, electronic-warfare and communications systems without proportionally increasing equipment size or weight. Qorvo has now received follow-on Phase II work.
Key points
- Qorvo reports more than a 400% increase in X-band GaN transistor RF power density through its DARPA-funded THREADS research.
- The development addresses heat at the transistor level rather than relying primarily on larger external cooling systems.
- Qorvo completed Phase I and has received follow-on Phase II work to continue developing the technology.
Heat Is Becoming the Limitation
Gallium nitride has already established itself as an important semiconductor material for high-power RF applications, particularly where high frequency, high voltage and power density are required.
But increasing the amount of RF power produced by a GaN transistor creates another engineering problem.
Heat.
As output power increases, heat generated in the transistor channel can reduce RF performance and device lifetime. Eventually, the thermal problem limits how much additional performance engineers can extract from the semiconductor.
That is the problem DARPA’s Thermal Reduction for Electronics through Advanced Devices and Heterogeneous Semiconductors program, or THREADS, is attempting to address.
Instead of treating cooling primarily as something that occurs outside the transistor package, THREADS moves thermal engineering closer to the semiconductor itself.
More Than a 400% Increase in RF Power Density
Qorvo announced on September 22 that its THREADS work has produced more than a 400% increase in RF power density at X-band.
X-band generally occupies frequencies around 8 to 12 GHz and is widely used for radar, communications and other RF systems.
Qorvo says its approach integrates new materials, semiconductor architectures and manufacturing processes intended to reduce total thermal resistance within the device.
Reducing thermal resistance allows heat generated in the active region of the transistor to escape more effectively.
That can allow engineers to operate the device at substantially higher RF power densities while maintaining acceptable temperatures and reliability.
The important development therefore isn’t simply a transistor producing more power.
It is a transistor architecture designed to handle the heat generated while producing that power.
DARPA Is Targeting 81 Watts per Millimeter
DARPA’s first-party THREADS documentation provides considerably more context for the scale of the project.
The agency says RF systems currently operate well below the potential electrical limits of their semiconductor devices because excessive heat reduces transistor performance and lifetime.
THREADS therefore established two primary technical challenges.
The first is reducing thermal resistance inside the semiconductor device without harming current transport through the transistor channel.
The second is efficiently moving heat away from high-power transistors without degrading RF performance.
DARPA’s eventual program target is particularly ambitious: an eightfold reduction in thermal resistance and X-band transistor power density reaching 81 W/mm.
That represents a significant change from treating thermal management primarily as a packaging, heatsink or system-level problem.
The objective is to engineer thermal performance directly into the transistor architecture.
Phase I Produced About Five Times the Power Density
Qorvo’s result is part of a broader set of THREADS Phase I accomplishments.
DARPA reported in June that Phase I performers had demonstrated approximately a fivefold increase in RF power density compared with current state-of-the-art devices.
According to DARPA, performers achieved these improvements while maintaining device lifetimes suitable for practical defense applications.
The agency estimates that the improvement in RF power density could translate into approximately twice the radar range in some implementations.
That is a program-level projection rather than a performance specification for a currently available Qorvo radar product.
The distinction matters.
Qorvo’s announcement describes an experimental semiconductor technology milestone, not a finished radar system or production RF amplifier.
Why X-Band GaN Matters
X-band occupies an important position in high-performance RF electronics.
Its frequencies are used in radar, satellite communications and other specialized communications systems. Generating substantial RF output at these frequencies requires power transistors capable of operating efficiently while handling high electric fields and significant thermal loads.
GaN is particularly well suited to these requirements because of its wide bandgap, high breakdown field and ability to operate at high power densities.
Qorvo already manufactures commercial X-band products using GaN-on-SiC technology.
For example, its production QPA2811 X-band power amplifier operates from 8.5 to 10.55 GHz and produces 60 W of output power. Qorvo manufactures the amplifier using its 0.15-micron QGaN15 GaN-on-SiC process.
The amplifier achieves 48.9 dBm saturated output power, 27.9 dB large-signal gain and 48.5% power-added efficiency.
That existing product helps illustrate the difference between today’s commercial GaN technology and the experimental transistor work occurring under THREADS.
The Research Goes Beneath the Package
Traditional high-power RF systems rely on multiple layers of thermal management.
Heat travels from the active semiconductor through the die, substrate, package, thermal interface materials and ultimately into a heatsink or another cooling system.
Each layer adds thermal resistance.
THREADS attempts to attack that thermal pathway much earlier.
Qorvo says its work incorporates new materials, device architectures and semiconductor processes specifically designed to reduce total thermal resistance within the device.
This could potentially allow more heat to leave the transistor’s active region before channel temperature becomes the factor limiting RF output.
If successfully transitioned into production semiconductor processes, the technology could allow engineers to obtain substantially greater RF output without simply making amplifiers, heatsinks and cooling systems larger.
Phase II Is Now Underway
Qorvo achieved its announced milestone at the end of THREADS Phase I.
DARPA has subsequently awarded Qorvo follow-on work for Phase II.
The program itself began in 2023 as a four-year research effort.
During Phase II, DARPA says participants will work toward still higher power levels and improved thermal performance.
The agency is also conducting a system-level study to identify RF power thresholds relevant to existing and future military systems.
That work is important because experimental semiconductor performance ultimately has to transition into manufacturable RF components and practical systems.
A transistor capable of extraordinary laboratory performance has limited value unless it can eventually meet reliability, manufacturing, packaging and system-integration requirements.
Development Status
The Qorvo technology described in the September announcement remains research and development work.
Qorvo has not announced a commercial part number, production transistor, evaluation board or release date based specifically on the THREADS technology.
There is consequently no commercial price for the device demonstrated under the program.
The next development stage is Phase II research.
Qorvo does, however, already manufacture numerous commercial GaN products covering X-band frequencies.
That makes the THREADS program particularly interesting because the company already possesses production GaN-on-SiC processes and commercial X-band RF products that provide an existing technology base for future development.
Existing Qorvo X-Band GaN Products
Engineers who want to evaluate currently available Qorvo X-band GaN technology do not have to wait for THREADS.
The QPA2811 is a production 60-W X-band GaN power amplifier covering 8.5 to 10.55 GHz.
Qorvo also offers the QPF5001, an 8-to-12-GHz, 12-W transmit/receive front-end module. It integrates a limiter, low-noise amplifier and power amplifier and provides 45% transmit power-added efficiency.
The QPF5005 covers the same 8-to-12-GHz X-band range with 5-W transmit capability and integrates a transmit/receive switch, limiter, low-noise amplifier and power amplifier.
These are commercial products and should not be confused with the experimental high-power-density transistor technology developed through THREADS.
Price, Purchasing and Availability
The THREADS transistor technology itself is not commercially available and Qorvo has published no price, delivery schedule or commercial ordering information for it.
Existing Qorvo X-band GaN components are available through Qorvo and authorized RF distributors.
At the time checked, Qorvo listed its production QPA2811 60-W X-band GaN amplifier with distributor inventory available through Richardson RFPD.
Qorvo also listed RFMW inventory for its QPF5001 and QPF5005 X-band front-end modules.
Prices vary by component and quantity and should be confirmed directly with Qorvo or the distributor before publication or purchasing.
First-Party Source Material
Qorvo — Qorvo Achieves Key X-Band GaN Milestone in DARPA THREADS Program
DARPA — THREADS Program
DARPA — THREADS the Needle on Thermal Barriers to RF Power
Qorvo — QPA2811 60-W X-Band GaN Power Amplifier
Qorvo — QPF5001 12-W X-Band Transmit/Receive Module
Qorvo — QPF5005 5-W X-Band Transmit/Receive Module
Further Reading
DARPA’s THREADS program page provides the most useful technical context for Qorvo’s announcement because it defines the larger program goals: reducing thermal resistance within RF devices while preserving channel-current transport and efficiently moving heat away from high-power transistors without degrading RF performance. DARPA’s ultimate targets include an eightfold reduction in thermal resistance and X-band power density of 81 W/mm.
DARPA — THREADS Program: Technologies for Heat Removal in Electronics at the Device Scale
DARPA’s June 10, 2026 Phase I update provides additional context for Qorvo’s reported power-density improvement. DARPA says THREADS Phase I performers collectively demonstrated approximately a fivefold increase in RF power density compared with state-of-the-art devices while maintaining device lifetimes required for practical defense applications. The program has now advanced into Phase II.
DARPA — THREADS the Needle on Thermal Barriers to RF Power
For comparison with commercially available GaN technology, Qorvo’s QPA2811 documentation describes a production 60-W X-band GaN power amplifier fabricated using the company’s 0.15-µm QGaN15 GaN-on-SiC process. The device covers 8.5 to 10.55 GHz and provides 48.9 dBm saturated output power, 27.9 dB large-signal gain and 48.5% power-added efficiency.
Qorvo — QPA2811 60-W X-Band GaN Power Amplifier
Original Article
Qorvo — “Qorvo Achieves Key X-Band GaN Milestone in DARPA THREADS Program”
Published September 22, 2026.
Qorvo reports achieving more than a 400% increase in X-band GaN transistor RF power density through R&D performed under DARPA’s THREADS program. Qorvo completed the milestone at the end of Phase I and has received follow-on Phase II work.
Qorvo — Qorvo Achieves Key X-Band GaN Milestone in DARPA THREADS Program
Contact for Purchase
The experimental GaN transistor technology developed by Qorvo under THREADS is not currently offered as a commercial product. Qorvo’s announcement identifies the technology as R&D and says the company has moved into Phase II of the DARPA program. No commercial part number, price or delivery date has been announced.
For currently available X-band GaN components, Qorvo provides direct purchasing, sample requests, evaluation hardware, sales assistance and authorized-distributor purchasing. Its production QPA2811, for example, is a 60-W X-band GaN-on-SiC amplifier, and Qorvo’s current product page shows distributor inventory.
Qorvo, Inc.
Greensboro, North Carolina
Commercial purchasing:
Production X-band GaN amplifier:
Qorvo QPA2811 Product and Purchasing Page
QPA2811 evaluation/reference hardware:
Qorvo Power Amplifier Design Resources
Qorvo Online Store telephone ordering: 1-844-367-7786, Monday–Friday, 6 a.m.–5 p.m. Pacific Time. Qorvo states that online-store orders are fulfilled by RFMW, an authorized Qorvo distributor.
THREADS technology price: Not available
THREADS commercial delivery date: Not announced
Development status: Phase II research and development
Commercial Qorvo GaN products: Available through Qorvo and authorized distributors
