一种新型超短波宽带校正时钟源研制

发布时间：2018-01-16 12:30

本文关键词：一种新型超短波宽带校正时钟源研制　出处：《电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：通信技术的飞速发展,推动了通信设备的快速更新换代。多通道测向设备逐渐向小型化升级,从而对其核心组成部件校正信号源提出了更高的要求。因此多功能的校正源研制愈发必要。本文主要设计制作了一款多功能的校正时钟模块,其核心本质为频率源。共有3路输出信号。其一是600~1600 MHz的宽带梳状谱输出,即时频谱带宽大于16 MHz,频谱间隔为500 KHz,输出功率覆盖-30dBm~-90dBm。其二是600~1600MHz的脉冲信号源输出,脉冲周期为100?s,脉冲宽度为3?s。第三是80 MHz的固定点频信号,相位噪声达到-120dBc/Hz@10KHz。论文对阶跃二极管方案和计数器方案进行对比,选取了计数器方案制作梳状谱;谱线宽度能够精确控制。脉冲发生器则采用的典型的锁相环加射频开关切换的方式实现,切换时间由复杂可编程逻辑器件(CPLD)精确控制。80 MHz的高相噪频率源则通过对比锁相环方案和倍频器方案,选择了三极管参量倍频的方式实现。最终设计并制作完成了具有工程实用价值的样品。校正时钟模块的设计具有一些新的特点,提出了有别于传统校正源的梳状谱校正方法。而且实现输出信号的宽带调整,应用范围大大拓宽。模块也由单一功能向复合功能发展,实现多功能合一,节省了接收机宝贵的空间资源;此外数字可编程器件的引入也方便了系统日后的升级;最后对校正源工程样品进行了详细的测试,并对测试结果进行了分析。针不足之处进行了总结,并提出了可以改进的工作意见。
[Abstract]:The rapid development of communication technology has promoted the rapid upgrading of communication equipment. Multi-channel direction-finding equipment is gradually upgraded to miniaturization. Therefore, it is necessary to develop a multi-function correction source. A multi-function correction clock module is designed and manufactured in this paper. Its core nature is a frequency source. There are three output signals. One is the broad band comb spectrum output of 600 ~ 1 600 MHz. The real-time spectrum bandwidth is more than 16 MHz. The frequency spectrum interval is 500kHz, the output power coverage is -30dBmmg-90dBm. the second is the output of 600,600MHz pulse signal source, the pulse period is 100? S, the pulse width is 3? The third is the fixed point frequency signal of 80 MHz with phase noise of -120dBc / Hz@ 10kHz. This paper compares the step diode scheme with the counter scheme. The counter scheme is selected to make comb spectrum. The spectral line width can be controlled accurately. The pulse generator uses a typical phase-locked loop and RF switch switching mode. The switching time is precisely controlled by the complex programmable logic device (CPLD). The high phase noise frequency source of .80 MHz is compared with the phase locked loop scheme and the frequency multiplier scheme. The parametric frequency doubling method of Triode is chosen to realize. Finally, the sample with practical engineering value is designed and made. The design of calibration clock module has some new characteristics. Different from the traditional correction source, the comb spectrum correction method is proposed, and the wideband adjustment of the output signal is realized, and the application range is greatly broadened. The module is also developed from a single function to a composite function to realize the integration of multiple functions. The valuable space resources of the receiver are saved; In addition, the introduction of digital programmable devices also facilitates the upgrade of the system in the future; Finally, the calibration source engineering samples are tested in detail, and the test results are analyzed. The shortcomings of the needle are summarized, and some suggestions for improvement are put forward.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN78

【共引文献】