UHF-Band 4kW Broadband High Efficiency GaN Amplifier

Because of the excellent performance, phased array technology has been widely applied. Phased array can be shifted instantly from a target to another by electric scanning, which enhances the probability of capturing and tracing multiple targets. The Wide-band Synthetic Aperture Radar (WB-SAR) is a new radar system which is an investigative hotpots in the radar technologies nowadays. The SAR offer a greatness distinction of target character on different frequency band, and it has a strong penetrating performance can detect the concealed targets which under foliage or under the earth's surface when it operates on VHF/UHF band, furthermore, VHF/UHF band transmitter has extended application such as passive target identification, precise position, target imaging and discrimination. Many people show considerable interest in the radar imaging technology on the band. As a main part of multi frequency band SAR on the middle or low frequency band, the performance of VHF/UHF P band Wide-band High power amplifier (HPA) chain has a direct influence on the performance of the whole system, so the research of the HPA is the key component in T/R modules for UHF band phased array antenna. HPA with high power, high efficiency, small size and wide bandwidth are critical enablers for the widespread application of digital T/R modules in the future.