本文给出了一款工作在VHF波段小型化高功率容量的低通滤波器。滤波器理论频率响应曲线采用准椭圆函数响应,由于有限传输零点的存在,使得该滤波器能在最少阶数时获得最好的抑制,同时插损也是最小。谐振器采用金属片加载电容的方式滤波,该方式成本低,容易加工实现,且功率容量大,实际测试表明,该滤波性能良好、功率容量超过1000W。 This article presents a low-pass filter that works in miniaturized high power capacity in the VHF band. The theoretical frequency response of the filter is quasi-elliptic function response. Due to the limited transmission zero, the filter can achieve the best rejection at the least order, and the insertion loss is also the smallest. The resonator adopts the way of the metal plate to load the capacitor to filter, which has the advantages of low cost, easy processing and large power capacity. Actual tests show that the filter performance is good and the power capacity exceeds 1000W.