A dual-mode resonant structure and filter

Abstract

An embodiment of the present invention provides a dual-mode resonant structure and filter, including at least one dielectric block, the dielectric block is a cuboid, and the length, width and height of the dielectric block correspond to the first edge, the second edge and the The third edge; the length of the first edge is greater than the length of the second edge, the length of the first edge is greater than the length of the third edge, the length of the second edge and the length of the third edge Equal or similar; at least one first edge of the dielectric block is cut off; the surface of the dielectric block is coated with a metal layer, and at least one first edge is provided on the surface of the dielectric block parallel to or coincident with the first edge A coupling window to leak out of the dielectric block. Through the relationship between the length, width and height of the dielectric block, the basic mode and dual mode are realized. The dual-mode coupling of the dielectric block is realized by cutting the corner at the edge. A metal layer is plated on the surface of the dielectric block, and a coupling window parallel to the slot is provided on one side of the dielectric block to realize the coupling between the two dielectric blocks.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of filters, in particular to a dual-mode resonant structure and a filter. Background technique [0002] Dielectric resonators can be traced back to the end of the 1930s. However, due to the low level of technology and technology at that time, it was not possible to develop high dielectric constant materials with sufficiently small losses in the microwave frequency band, so dielectric resonators failed. be promoted and applied. Until the 1960s, due to the progress of material science and technology, it became possible to develop microwave dielectric materials with low loss and high dielectric constant. At the same time, due to the development of space technology, the requirements for high reliability and miniaturization of electronic equipment are increasingly urgent. Therefore, research on dielectric resonators has been revived. In the 1970s, countries such as the United States and J...

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Problems solved by technology

[0006] The embodiment of the present invention provides a dual-mode resonant structure and filter, which is used to solve the problem of low single-cavity Q value due to the thinner cavity in the existing dual-mode filter technology, so that the insertion loss of the filter is relatively large, and at the same time due to the adopted It is a high-order dual-mode, and the lower-frequency fundamental mode will produce a resonance peak on the left side of the passband, which will make the out-of-band rejection worse or even fail to meet the requirements of the filter.

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