摘要
低噪声放大器是射频接收前端中的关键部件,它可以大大改善整个接收机的信噪比。介绍一种C频段低噪声放大器的设计过程,并且给出电路实测结果。该放大器由两级NEC的场效应管NE334S01级联组成,在ADS 2011中进行电路仿真,并依照仿真结果制作印制板图。放大器实物测试结果显示,在3.6GHz^4.2GHz范围内增益为(30±2)dB,噪声温度小于45K,输入、输出驻波比均小于1.5:1,达到了预期要求。
Low noise amplifier is the key unit in the front end of RF receiving system, which can improve the signal to noise ra- tio of the receiver greatly. The design process of a C-band low noise amplifier is introduced, and the test result of the circuit is giv- en. The amplifier is composed of two-stage FET NE334S01 of NEC company. The circuit is simulated by ADS 2011, and the prin- ted board is made according to the simulation result. The test results show that in the frequency range of 3.6GHz - 4.2GHz, the gain is （30 ± 2） dB, the noise temperature is less than 45K, and the VSWRIN and VSWROUT are all less than 1.5：1, which can meet the expected design requirements.
出处
《遥测遥控》
2015年第3期37-40,53,共5页
Journal of Telemetry,Tracking and Command
关键词
低噪声放大器
射频接收前端
信噪比
ADS仿真
噪声温度
Low noise amplifier
Front end of RF receiving system
Signal to noise ratio
ADS simulation
Noise temperature
