摘要
设计出一款应用于多模式卫星导航接收机射频前端的双波段LNA,该电路可以工作在1.575GHz和1.267GHz两个波段附近,覆盖了当今各种卫星导航系统的载波频段.LNA的输入阻抗和输出阻抗均被匹配到50Ω,电路采用0.18μmCMOS工艺实现.测试结果表明该电路在1.575GHz和1.267GHz两个波段上噪声系数分别为0.88dB和0.78dB,功率增益分别为25.5dB和25.9dB,S11分别为-16dB和-12.5dB,1dB压缩点分别为-23.4dBm和-23.6dBm,1.8V供电电压条件下静态工作电流均为4.0mA.电路在上述两个频段上稳定性均满足要求.
A dual-band low-noise amplifier（LNA）for RF front-end of multimodal GNSS receiver is presented,which is capable of handling input signals near by 1.575 GHz and 1.267 GHz.All of the inputs and outputs are matched to 50 Ω.A 0.18 μm CMOS process is used for the circuit.measurement results show that the LNA has a noise figure of 0.88 dB and 0.78 dB,a power gain of 25.5 dB and 25.9 dB,a S11 of-16 dB and-12.5 dB,a P1 dB of-23.4 dBm and-23.6 dBm with good stability and bias current of 4.0 mA from a 1.8 V supply at 1.575 GHz and 1.267 GHz respectively.The circuit can satisfy the requirements very well.
出处
《微电子学与计算机》
CSCD
北大核心
2011年第1期69-73,共5页
Microelectronics & Computer
基金
国家科技重大专项(2009ZX1031-002-008)
关键词
LNA
双波段
射频前端
多模式
low noise amplifier
Dual-band
RF front-end
multimode
