Zhou Shaohua, Wang Jian
School of Microelectronics, Tianjin University, Tianjin 300072, China.
Qingdao Institute for Ocean Technology, Tianjin University, Qingdao 266200, China.
Micromachines (Basel). 2022 Aug 6;13(8):1268. doi: 10.3390/mi13081268.
To investigate the relationship between the specifications degradation of a low-noise amplifier (LNA) and temperature, we experimentally investigated the degradation characteristics of the specifications of the LNA at different temperatures. The small-signal gain (S21) of the LNA decreases with increasing temperature. This paper discusses and analyzes the experimental results in detail, and the reasons for the degradation of LNA specifications with temperature changes are known. Finally, we have tried to use the structure already available in the literature for the PA temperature compensation circuit for the temperature compensation of the LNA. The results show that the existing circuit structure for PA temperature compensation in the literature can also effectively compensate for the S21 and NF degradation of the LNA due to the temperature increase.
为了研究低噪声放大器（LNA）的性能退化与温度之间的关系，我们通过实验研究了LNA在不同温度下的性能退化特性。LNA的小信号增益（S21）随温度升高而降低。本文详细讨论并分析了实验结果，明确了LNA性能随温度变化而退化的原因。最后，我们尝试使用文献中已有的用于功率放大器（PA）温度补偿电路的结构来对LNA进行温度补偿。结果表明，文献中现有的用于PA温度补偿的电路结构也能有效补偿LNA因温度升高而导致的S21和噪声系数（NF）退化。
