论文部分内容阅读
通过选用噪声系数小、性能优良、价格便宜的AT41486晶体管,使用安捷伦公司的ADS软件,设计了一个适于基站GSM的多制式宽带低噪声放大器(LNA)。该放大器工作频率范围为1700MHz～2000MHz,噪声系数不大于1.8dB,增益不小于13dB,频带内增益平坦度不大于0.5dB,输入电压驻波比小于2.0,输出电压驻波比小于3.3。电路具有噪声系数小,增益大,频带内增益平坦度小,性能优良等特点。
By using the AT41486 transistor with low noise figure, high performance and low cost, a multi-system wideband low noise amplifier (LNA) designed for base station GSM was designed by using Agilent’s ADS software. The amplifier operating frequency range of 1700MHz ~ 2000MHz, the noise figure is not more than 1.8dB, the gain is not less than 13dB, the gain flatness within the band is not more than 0.5dB, the input voltage standing wave ratio is less than 2.0, the output voltage standing wave ratio is less than 3.3. The circuit has the characteristics of small noise figure, large gain, small in-band gain flatness and excellent performance.