Low Noise Amplifier Used in Beidou Navigation Satellite System
Ying Zhang · Computer Technology and Development · 2012
The Beidou satellite navigation system is independently developed by China,its development purpose is to consolidate Chinese military strength in an increasingly grim world environment.The Beidou RF receiver chip is the core of the entire ground-side equipment of the Beidou satellite navigation system,therefore the RF receiver chip's RD work has important practical significance.Design a low-noise amplifier for Beidou(COMPASS) navigation satellite system based on the theory of narrow-band low noise amplifier by using TSMC 0.18μm CMOS process.The amplifier uses the improved single to differential circuit structure,and through effective buffer stage circuit corrects the differential signal amplitude and phase deviation.The experimental results show that the circuit in 2.45GHz~2.55GHz band,the input return loss is less than-28dB,noise figure is less than 1.1dB,power gain greater than 15dB,voltage gain higher than 32dB.