A triple-mode dielectric resonator filter includes: a dielectric resonator positioned in a cavity of a housing and formed perpendicular to a longitudinal direction of the housing; a dielectric support coupled to the dielectric resonator through a bonding process and mounted and fixed by a fixing scr
A triple-mode dielectric resonator filter includes: a dielectric resonator positioned in a cavity of a housing and formed perpendicular to a longitudinal direction of the housing; a dielectric support coupled to the dielectric resonator through a bonding process and mounted and fixed by a fixing screw passing through a screw fixing mounting hole in the cavity of the housing and fixed to support the dielectric resonator at a predetermined height; and compensation blocks formed to protrude at regular intervals on a side surface of the dielectric resonator to allow the dielectric resonator to operate in three modes. A band pass filter composed of a dielectric resonator and an NRN stub achieves an improved insertion loss, high compression properties and a stable structure compared to a typical band pass filter using an NRN stub.
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1. A triple-mode dielectric resonator filter, comprising: a housing having one side thereof open while having a cavity thereinside;a cover coupled to one side of the housing to seal the cavity;a dielectric resonator having a screw mounting hole at the center thereof, positioned in the cavity of the
1. A triple-mode dielectric resonator filter, comprising: a housing having one side thereof open while having a cavity thereinside;a cover coupled to one side of the housing to seal the cavity;a dielectric resonator having a screw mounting hole at the center thereof, positioned in the cavity of the housing, and formed perpendicular to a longitudinal direction of the housing;a dielectric support coupled to the dielectric resonator through a thermosetting bonding process and mounted by a fixing screw passing through the screw mounting hole inside the cavity of the housing and fixed to support the dielectric resonator at a predetermined height; anda plurality of compensation blocks formed to protrude at regular intervals on a side surface of the dielectric resonator to allow the dielectric resonator to operate in three modes. 2. The triple-mode dielectric resonator filter of claim 1, wherein the plurality of compensation blocks for allowing the dielectric resonator to operate in three modes are formed to be paired with each other such that the horizontal cross-section of the dielectric resonator has a symmetric shape. 3. The triple-mode dielectric resonator filter of claim 2, wherein the plurality of compensation blocks are configured such that compensation blocks adjacent to each other on a side surface of the dielectric resonator are smoothly connected to a curved surface having a cross-section in an arc shape. 4. The triple-mode dielectric resonator filter of claim 3, wherein the height of the dielectric resonator and the length between the plurality of compensation blocks facing each other based on the horizontal cross-section of the dielectric resonator are adjusted to an optimized state to set resonant frequencies operating in three modes. 5. The triple-mode dielectric resonator filter of claim 4, wherein when the height of the dielectric resonator is relatively greater than the length between the plurality of compensation blocks facing each other based on the horizontal cross-section of the dielectric resonator, resonant frequencies of TE01δx and TE01δy modes are higher than a resonant frequency of TE01δz mode in resonant frequencies operating in three modes. 6. The triple-mode dielectric resonator filter of claim 4, wherein when the height of the dielectric resonator is relatively less than the length between the plurality of compensation blocks facing each other based on the horizontal cross-section of the dielectric resonator, resonant frequencies of TE01δx and TE01δy modes are lower than a resonant frequency of TE01δz mode in resonant frequencies operating in three modes. 7. The triple-mode dielectric resonator filter of claim 4, wherein when the height of the dielectric resonator is the same as the length between the plurality of compensation blocks facing each other based on the horizontal cross-section of the dielectric resonator, resonant frequencies of TE01δx and TE01δy modes are similar to a resonant frequency of TE01δz mode in resonant frequencies operating in three modes. 8. The triple-mode dielectric resonator filter of claim 3, wherein the dielectric support coupled to the dielectric resonator through a thermosetting bonding process is coupled thereto with a bonding material made of an epoxy material. 9. (canceled) 10. A band pass filter using a dielectric resonator and an NRN stub, the filter comprising: a housing and a cover, wherein the housing is formed to have one side thereof open while having a cavity thereinside and the cover is coupled to one side of the housing to seal the cavity;a dielectric resonator formed in a central portion of the cavity inside the housing and operating at resonant frequencies in three modes of TE01δx, TE01δy, and TE01δz;a dielectric support for supporting the dielectric resonator formed in a cylindrical shape;a λ/4 transmission line formed along the outside of the cavity while surrounding the dielectric resonator;an NRN stub connected to the λ/4 transmission line and capable of obtaining the same number of transmission zeros and reflection zeros as the number of modes of the dielectric resonator; anda coupling stub connected to the λ/4 transmission line and formed around the dielectric resonator to mutually couple the dielectric resonator and the NRN stub. 11. (canceled) 12. The band pass filter of claim 10, wherein the dielectric resonator has a screw mounting hole in the center thereof, positioned in the central portion of the cavity of the housing, and formed perpendicular to a longitudinal direction of the housing. 13. The band pass filter of claim 10, wherein the NRN stub is formed in plurality in each of TE01δx, TE01δy, and TE01δz modes and formed along the outside of the transmission line. 14. The band pass filter of claim 10, wherein the NRN stub is an inductive NRN stub acting as an inductor, and the reactance of the stub is adjusted using the length and width of the inductive NRN stub. 15. The band pass filter of claim 13, wherein each of the NRN stubs formed in each of TE01δx, TE01δy, and TE01δz modes has an end thereof formed as a short circuit line. 16. The band pass filter of claim 10, wherein the coupling stub is formed in each of TE01δx, TE01δy, and TE01δz modes which respectively correspond to the triple-mode dielectric resonator operating in TE01δx, TE01δy, and TE01δz modes and the NRN stub formed in each of TE01δx, TE01δy, and TE01δz modes. 17. The band pass filter of claim 16, wherein the length of the coupling stub disposed between the dielectric resonator and the NRN stub in each of TE01δx, TE01δy, and TE01δz modes is increased to widen the intervals between the reflection zeros, thereby forming a wide passband. 18. The band pass filter of claim 16, wherein each of the coupling stubs in each of TE01δx, TE01δy, and TE01δz formed corresponding to the plurality of NRN stubs in each of TE01δx, TE01δy, and TE01δz modes has an end thereof formed as an open line. 19. The band pass filter of claim 16, wherein the coupling stubs in each of TE01δx, TE01δy, and TE01δz are arranged to have the same field orientation and a perpendicular coupling structure to minimize parasitic coupling occurring between each mode and each coupling structure. 20. The band pass filter of claim 16, wherein the coupling stub of TE01δx mode and the coupling stub of TE01δy mode are arranged to be perpendicular to each other, and the coupling stub of TE01δz mode is disposed to be mutually perpendicular to the coupling stub of TE01δx and the coupling stub of TE01δy to minimize the parasite coupling structure with the resonator in TE01δx and TE01δy modes. 21. The band pass filter of claim 16, wherein the length of the coupling stub for the TE01δx mode and the length of the coupling stub for the TE01δy mode are varied in a z-axis direction, and the length of the coupling stub of the TE01δz mode is varied along the direction of the circumference of the dielectric resonator. 22. A band pass filter using a dielectric resonator and an NRN stub, the filter comprising: a housing and a cover, wherein the housing is formed to have one side thereof open while having a cavity thereinside and the cover is coupled to one side of the housing to seal the cavity;a dielectric resonator formed in a central portion of the cavity inside the housing and operating at triple-mode resonant frequencies of TE01δx, TE01δy, and TE01δz;a dielectric support having compensation blocks formed to protrude at regular intervals on a surface of the dielectric resonator and supporting the dielectric resonator;a λ/4 transmission line formed along the outside of the cavity while surrounding the dielectric resonator;an NRN stub connected to the λ/4 transmission line and capable of obtaining the same number of transmission zeros and reflection zeros as the number of modes of the dielectric resonator; anda coupling stub connected to the λ/4 transmission line and formed around the dielectric resonator to mutually couple the dielectric resonator and the NRN stub. 23. The band pass filter of claim 22, wherein the dielectric resonator has a screw mounting hole in the center thereof, positioned in the central portion of the cavity of the housing, and formed perpendicular to a longitudinal direction of the housing. 24. The band pass filter of claim 22, wherein the NRN stub is formed in plurality in each of TE01δx, TE01δy, and TE01δz modes and formed along the outside of the transmission line. 25. The band pass filter of claim 24, wherein each of the NRN stubs formed in each of TE01δx, TE01δy, and TE01δz modes has an end thereof formed as a short circuit line. 26. The band pass filter of claim 22, wherein the NRN stub is an inductive NRN stub acting as an inductor, and the reactance of the stub is adjusted using the length and width of the inductive NRN stub. 27. The band pass filter of claim 22, wherein the coupling stub is formed in each of TE01δx, TE01δy, and TE01δz modes which respectively correspond to the triple-mode dielectric resonator operating in TE01δx, TE01δy, and TE01δz modes and the NRN stub formed in each of TE01δx, TE01δy, and TE01δz modes.
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