Ampleon has announced the B11G4450N91D, a fully integrated dual-section, three-stage 4.4–5.0 GHz Doherty MMIC driver designed to drive GaN-based final power amplifiers in macro cellular base stations. It is engineered to improve overall amplifier linearity while simplifying RF power amplifier design.
GaN has become the technology of choice for the final power amplifier stages in macro cellular base stations. But the driver stage – that critical link in the signal chain between your DSP and the GaN output – is where lineup linearizability is made or broken. A noisy, discrete, hard-to-match and characterize driver creates DPD headaches upstream and limits how much headroom your finals can actually deliver. The B11G4450N91D addresses this directly. Built on LDMOS – Ampleon’s legacy technology with inherently superior AM-AM and AM-PM characteristics at driver power levels – it brings the linearity discipline the driver stage has been missing in a GaN-final world.
That linearity advantage is compounded by full integration: carrier and peaking amplifiers, input splitting, output combining, and pre-matching networks all consolidated in one compact, well-characterised package. Fewer discrete components, a cleaner PCB, and consistent device-to-device behaviour that makes DPD model training faster and more repeatable across production runs.
At 35.4 dBm average output power with 29.4 dB gain and large instantaneous bandwidth across the full 4.4-5.0 GHz range, the B11G4450N91D gives GaN finals the headroom they’re rated for. Independent carrier and peaking bias control provides real tuning flexibility across operating modes, while 10:1 VSWR robustness and solid thermal management ensure stable performance under the continuous, high-utilisation demands of 5G macro deployments.
The B11G4450N91D is available now through Ampleon‘s global distribution network. Reach out to your Ampleon sales contact or preferred distributor to discuss your lineup architecture – whenever you’re ready to explore the fit, we’re here to think it through with you.