BAND-STOP FILTER Russian patent published in 2016 - IPC H01P1/00 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering and specifically to microwave engineering, and is intended for creation of band-stop filters based on dielectric resonators mainly in decimeter wavelength range. Distinctive feature of the invention is that the band-stop filter is equipped with hollow cylindrical sections arranged alternatively on opposite sides relative to the transmission line through the distance of one quarter wave (λ/4). In each hollow cylindrical section there is a disc dielectric resonator (DDR), fixed between the main and an extra dielectric supports, in the extra support there is a hole, in which there is a screw of adjustment. Transmission line made in the form of a coaxial line is equipped with conductors of loops connected to its inner conductor, and each of the loops conductors is extended inside the cavity of the cylindrical section in the form of a coupling loop, the end of which is fixed, for example, by soldering on the wall of the cylindrical section. Coupling loop is made from a conductor in the form of a "butterfly tail", which concave side faces the DDR, and the length of the conductor of the concave side is 0.25-0.3 of the DDR diameter. DDR 3 are configured in the stop band for different resonance frequencies, and the ratio of thicknesses of the DDR and dielectric supports 4, 5 is selected within , where ε_p<<ε_p are dielectric permeability, and H_s, H_r are thickness of supports 4, 5, and DDR 3 respectively.

EFFECT: technical result is reduced electric length higher selectivity and improved stability of electric characteristics of the high power filter.

3 cl, 5 dwg