介绍一种通过逻辑芯片控制多组电容的VHF接收机预选滤波器,以实现中心频率可调谐,从而达到对宽频带的覆盖,并且有较好的选择性。采用专用软件ADS对所设计的滤波器进行仿真。并通过理论与实验的方法研究其性能。实验表明,测试结果与仿真结果基本吻合。 This paper introduces a VHF receiver preselection filter which controls multiple sets of capacitors by logic chips to achieve the center frequency tunable, so as to achieve the coverage of wide frequency band with better selectivity. Adopting special software ADS to simulate the designed filter. And through theoretical and experimental methods to study its performance. Experiments show that the test results are basically consistent with the simulation results.