Dielectric filter, multimode dielectric filter and communication base station

The invention discloses a dielectric filter which at least comprises two resonators, at least one resonator is provided with one or more metal blind holes, and each metal blind hole comprises a blind hole formed in a resonator body and metal layers formed at the bottom and the side wall of the blind hole into a whole. According to the resonator provided by the invention, the metal blind holes are formed in the dielectric resonator body, so that the symmetry of an electromagnetic field is disturbed, a high-order mode is disturbed, and the high-order mode is far away from a passband; a low-pass filter does not need to be added, so that the loss is reduced, and meanwhile, the power consumption of base station, small station or micro station equipment applying the dielectric filter is also reduced. The invention also discloses a multimode dielectric filter and a communication base station. 本申请公开了一种介质滤波器，至少包括两个谐振器，至少一个谐振器上设置有一个或多个金属盲孔，所述金属盲孔包括设置在谐振器本体上的盲孔和在盲孔底部及侧壁形成互为一体的金属层。本申请所述的谐振器，通过在介质谐振器本体上设置金属盲孔，扰乱电磁场的对称性、干扰