用于精确卫星导航的单通道双频低噪声放大器研制  

Development of Single-Channel Dual-Frequency Low Noise Amplifier for Precise Satellite Navigation

作　　者：邓淑珍 林福民[1] 周冬跃[1] 李红涛[1] 王媛媛 DENG Shuzhen;LIN Fumin;ZHOU Dongyue;LI Hongtao;WANG Yuanyuan(School of Physics and Optoelectronic Engineering,Guangdong University of Technology,Guangzhou Guangdong 510006,China)

机构地区：[1]广东工业大学物理与光电工程学院,广东广州510006

出　　处：《电子器件》2023年第3期619-623,共5页Chinese Journal of Electron Devices

摘　　要：为了实现多频点、低成本、改善电路结构,设计了一款用于四大卫星导航系统的单通道双频低噪声放大器。该设计采用三级放大器级联实现高增益,分路、合路器采用电容、电感搭建,有利于小型化、节约成本,并通过引入后级带通滤波器提高射频前端的抗干扰能力。实测结果表明,在L1(1.5 GHz~1.6GHz)、L2(1.176 GHz~1.28 GHz)工作频段内,输入反射系数小于-10 dB,增益在40 dB左右,噪声系数小于1.5 dB。该低噪声放大器具有结构简单、性能好、低成本等优点,能较好地应用于GNSS接收设备终端应用系统。In order to achieve multi-frequency, low cost and improve circuit structure, a low-noise amplifier is designed for four major satellite navigation systems. Characteristic of the amplifier is single-channel dual-frequency(1.5 GHz-1.6 GHz, 1.176 GHz-1.28 GHz). The design achieves high gain by using three-stage amplifiers cascaded. The splitter and combiner are built with capacitors and inductors, which is conducive to miniaturization and cost savings. Post-stage bandpass filter is introduced to improve the anti-interference ability of the RF front-end. The actual measurement results show that the input reflection coefficient is less than-10 dB in the L1(1.5 GHz-1.6 GHz)and L2(1.176 GHz-1.28 GHz)working frequency bands. At the same time, the gain is above 40 dB and the noise figure is less than 1.5 dB. The advantages of the low noise amplifier are simple structure, good performance, and low cost. The amplifier can be better applied to the terminal application system of GNSS receiving equipment.

关 键 词：低噪声放大器 单通道双频 卫星导航系统 

分 类 号：TN73[电子电信—电路与系统]