1kW Solid State Power Amplifier for L-band radar system

A 1kW Solid State Power Amplifier (SSPA) is proposed for achieving high power and high efficiency using Gallium Nitride (GaN) technology for L-band radar applications. Measured results showed more than 1 kW within a 200 MHz bandwidth with 53 dB gain and a typical 50% drain efficiency. The SSPA realizes a negative voltage supply, sequential bias circuit, temperature sensor circuit, and external switching circuit including. Its compact and lightweight design is suitable for various radar systems. This paper presents a high power SSPA using GaN HEMT device that appears high power and high efficiency.