摘要
针对无人机数据链机载设备体积小重量轻的特点,文中采用集成锁相环芯片ADF4350设计了一种适合无人机数据链机载设备的接收机本振源。该芯片集领先的PLL功能和性能与完全集成的超宽带VCO于一体,设计时只需外加环路滤波器、参考源和控制电路即可构成完整的锁相频率合成器。根据实际测试,本振源的相位噪声为-92.28 d Bc/Hz/20 k Hz,频率准确度和稳定度分别为0.278 7 ppm和0.23 ppm,均满足系统指标要求。通过实际工程验证,结果表明此本振源性能稳定可靠,具有较强的工程实用性。
For the characteristicsof small size and light weightof UAV datalink airborne equipment, a receiver local oscillator suitable for UAV data link airborne equipment based on integrated PLL chip ADF4350 is designed in this paper. The chip puts together leading PLL functionality and performance with fully integrated ultra-wideband VCO, simply add the loop filter, the reference source and control circuitry to form a complete PLL frequency synthesizer. According to actual testing, the phase noise of local oscillator is-92.28 d Bc/Hz/20 k Hz,and the frequency accuracy and stability are 0.23 ppm and 0.278 7 ppm,fully meet the requirements of the system. Through practical engineering verification, the results show that the local oscillator is stable and reliable, and it has a strong engineering practicability.
出处
《电子设计工程》
2016年第10期114-116,120,共4页
Electronic Design Engineering
基金
总装航空支撑项目(619011101103)
