中文摘要：

为适应对不同GHz高频信号的需求,设计了输出信号频率可在一定范围变化的GHz高频信号发生器。该系统以美国ADI公司生产的锁相集成芯片ADF4108为核心器件,选取MAXIM公司的MAX2750器件为压控振荡器,以单片机系统为控制单元,由此组成了一个频率可预置的GHz高频信号源,其信号的输出范围为2.4-2.5 GHz。信号输出频率范围、锁定时间、相位噪声以及相位裕度等指标均达到了设计目标。

英文摘要：

With the development of modem communication, radar and electronic countermeasure, frequency synthesis source-GHz frequency increasingly plays an important role in the entire electronic system. In order to fit the requirements of different signals of GHz frequency, the generator for signals of GHz frequency is designed according to the output signal frequency with a certain range. This system chooses phase lock chip ADF4108 as the core component produced by ADI Company and MAX2750 as voltage -controlled oscillator produced by MAXIM Company, regarding the single - chip system as the control unit, so that the signal source of GHz frequency is formed with a preset frequency. Its output signal range is 2. 4 - 2.5 GHz. The output frequency range, frequency synthesizer lock time, phase noise and phase margin and other indicators have reached the design objective.