论文部分内容阅读
自从毫米波固态器件问世以来,人们日益感兴趣于采用它们来组成各种体积小、重量轻的先进电子系统。特别是应用于雷达收发设备、高速数据传递系统、保密通信网、大气层和深空飞行器等场合。毫米波的优点是频带较宽,天线增益较高、元件尺寸较小以及窃听和干扰的可能性较小等。同时毫米波也有一些固有的缺点。研究雷达系统的关键参数后可以发现,在该系统领域内,振荡器稳定性问题尚未能像其它问题那样引起人们足够注意。用标准锁相技术降低相位噪声要比提高发射功率、天线增益或改进接收机噪声系统等,更能从本质上改善雷达的性能。
Since the advent of millimeter-wave solid-state devices, there has been an increasing interest in using them to form a variety of small and lightweight advanced electronic systems. Especially for radar transceiver equipment, high-speed data transmission systems, secure communication networks, the atmosphere and deep space aircraft and other occasions. The advantages of millimeter waves are wider frequency bands, higher antenna gain, smaller component sizes, and less potential for eavesdropping and interference. Millimeter waves also have some inherent disadvantages. After studying the key parameters of the radar system, it can be found that in the field of the system, the stability of the oscillator has not been able to attract enough attention as other problems. Decreasing the phase noise with standard phase-locking techniques can substantially improve the performance of the radar than by raising the transmit power, antenna gain, or improving the receiver noise system.