Dielectric waveguide filter

The embodiment of the utility model discloses a dielectric waveguide filter comprising a dielectric body which is provided with a plurality of isolation through grooves and a plurality of frequency tuning blind holes; the medium body is also provided with at least two port signal transmission holes; the port signal transmission hole and at least one part of the frequency tuning blind hole are positioned on two opposite surfaces of the dielectric body; and in the thickness direction of the dielectric body, the port signal transmission hole is not overlapped with the frequency tuning blind hole.The dielectric waveguide filter provided by the embodiment of the utility model can realize miniaturization under the condition of improving the out-of-band rejection capability. 本实用新型实施例公开了一种介质波导滤波器，所述介质波导滤波器包括：介质本体，所述介质本体上设置有若干隔离通槽和若干频率调谐盲孔；所述介质本体上还设置有至少两个端口信号传输孔；所述端口信号传输孔与至少部分所述频率调谐盲孔位于所述介质本体相对的两面；且在沿所述介质本体的厚度方向上，所述端口信号传输孔与所述频率调谐盲孔不交叠。本实用新型实施例的介质波导滤波器在提高带外抑制能力的情况下能够实现小型化。