摘要
介绍了一种Ga N大功率高线性固态发射机。利用Ga N HEMT的高功率特性,结合新型波导魔T低损耗功率合成的特点,在7.9~8.4GHz范围内实现了连续波饱和输出功率大于200W,效率大于20%。此外,应用新型模拟预失真方法提升功放的线性化指标,在额定输出功率下三阶交调指标（IMD3）优于-30d Bc,改善功放的线性度11d B。该发射机具有输出功率大,线性度好等优点,整体性能优于国外同类产品。
A Ga N SSPA transmitter with high power and high linearity is presented. Using high power Ga N HEMT devices and the new Magic-T high efficiency power combiner,the SSPA delivers more than 200 W saturated output power with power efficiency above 20% in the frequency range of 7.9 ~ 8.4GHz. Additionally,a new analog pre-distortion method is applied to improve linearity,achieves IMD3 of- 30 d Bc with rated output power,which improves the linearity by11 d B. The advantages in high power and high linearity make the specification of the transmitter better than the similar abroad products.
出处
《电子信息对抗技术》
2016年第2期61-65,共5页
Electronic Information Warfare Technology
