摘要
针对温度等因素会改变三极管的静态工作点进而影响放大器性能的问题,采用一种直流偏置反馈控制技术,设计了一个X波段的低噪声放大器。同时,采用等资用功率增益圆和等噪声系数圆相结合的方法,以加快LNA的设计过程。对成品的实际测试和调试表明,此放大器达到了预定的技术要求,性能良好,其工作频率范围为10.2 GHz～10.8 GHz,噪声系数小于2 dB,增益达到34.5 dB,S参数S11优于-10 dB。
Aiming at the temperature and other factors will change the quiescent operating point of the transistor, and then affect the performance of the amplifier, this paper introduces a DC bias feedback control technology to design an X-band low noise amplifier（LNA）. In order to accelerate the design process of the LNA, this paper also adopts a method of combining available power gain circles with noise figure circles to design LNA. Finally, the practical test and debugging demonstrate that this LNA has reached the scheduled technical requirements and works well. The operating frequency range is 10.2 GHz-10.8 GHz, the noise figure is less than 2 dB, the power gain is 34.5 dB and the S parameter SH is better than -10 dB.
出处
《电子技术应用》
北大核心
2013年第6期40-42,45,共4页
Application of Electronic Technique
作者简介
卢洪树，男，1988年生，硕士研究乍，主要研究方向：射频电路的设计。
张晓发，男，1978年生，讲师，主要研究方向：射频电路的设计。
袁乃昌，男，1965年生，教授，主要研究方向：射频电路的设计。
