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一款低噪声卫星导航接收机射频前端的设计 被引量：6

Design of a Low Noise RF Front-End of GNSS Receiver
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摘要 基于0.18μm RF CMOS工艺,采用低中频系统结构,设计了一款可应用于全球定位导航系统(GPS)L1频段和北斗二代(BD2)B1频段的低噪声卫星导航接收机的射频模拟前端芯片。该前端包括低噪声放大器、无源混频器、中频放大器、复数带通滤波器和数控可变增益放大器。其中低噪声放大器采用电流舵技术,与无源混频器一起,提高了射频前端的1dB压缩点输入功率(Pi(1dB)),有效地改善了系统的线性度。测试结果显示,在GPSL1频点,系统的最大增益107.2dB,噪声系数达到1.8dB,动态增益66dB,镜像抑制比约为39.54dB,Pi(1dB)为-41dBm,电源为1.8V时,消耗电流16mA,芯片面积1.7mm×0.8mm。 An integrated low noise front-end global navigation satellite system （GNSS） receiver with low IF architecture applied to GPS L1 band and BD2 B1 band was designed based on 0. 18 μm RF CMOS process. This front-end consists of a low noise amplifier, a passive mixer, an IF amplifier, a complex band-pass filter and a programmable variable gain amplifier. The low noise amplifier using current-steering technique together with the passive mixer enhances the input power at the 1 dB compres- sion point （Pi（1dB） ） of this front-end and improves system linearity effectively. The test results show that the maximum gain of system is 107.2 dB with the noise figure of 1.8 dB, the dynamic gain is 66 dB, the image rejection ratio is about 39.54 dB, and the Pi（1dB） is about -41 dBm in GPS L1 band. The current is 16 mA with a 1.8 V power supply, and the chip area is 1.7 mm×0. 8 mm.
作者 左玉多 王帅 叶向阳
机构地区 中国电子科技集团公司第十三研究所
出处 《半导体技术》 CAS CSCD 北大核心 2015年第8期575-579,共5页 Semiconductor Technology
关键词 全球导航卫星系统(GNSS) 接收机 低中频 低噪声 射频模拟前端 global navigation satellite system （GNSS） receiver low IF low noise RF front-end
分类号 TN432 [电子电信—微电子学与固体电子学]
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参考文献11

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二级参考文献22

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半导体技术
2015年 第8期

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