本文根据实时信号的时域和频域特性,阐明了表面波滤波器设计中应用数字付氏变换技术的一些基本概念,得出了任意频响特性之表面波滤波器时域波形的求解方法.并利用数字付氏变换技术设计了我国目前制式的表面波电视中频滤波器(即SAWTVIF).实验上获得了预计结果,理论和实践十分一致.最后,本文报导了实验结果和研制SAWTVIF的频响波形照片. According to the real-time signal's time-domain and frequency-domain characteristics, this paper illustrates some basic concepts of applying digital Fu's transform technology in the design of SAW filter, and obtains the method of solving the time-domain waveform of SAW filter with arbitrary frequency response. And the design of the current system of surface wave TV IF filter (ie SAWTVIF) in our country is designed by using the digital Fourier transform technology.The experimental results obtained are in good agreement with the theory and practice.Finally, the paper reports the experimental results and the frequency response of SAWTVIF Waveform photo.