本文研究了毫米波宽带线性扫频技术，提出了将锁相技术和延迟线结合起来改善线性度这一新思想，并导出了锁相扫频环路的设计准则，采用了无色散的体声波延迟线、数字锁相环路、单片微波器件、高性能的毫米波器件等，结构上采用了高密度组装、ＳＭＴ等先进技术，研制的扫频源主要指标为带宽５００ＭＨｚ，线性度优于０．０１％。 This paper studies the millimeter-wave broadband linear sweep technology, puts forward the new idea that the phase-locked technique and the delay line are combined to improve the linearity, and the design guideline of the phase-locked sweep loop is derived. The dispersionless bulk acoustic wave Delay line, digital phase-locked loop, monolithic microwave device, high-performance millimeter wave device and so on. The structure adopts high-density assembly and SMT and other advanced technologies. The main index of swept frequency source developed is 500MHz bandwidth, 0.01%.