tm mode dielectric filter

Abstract

The invention is applied to the technical field of electron, and provides a transverse magnetic (TM) mold dielectric filter. The TM mold dielectric filter comprises a cavity body, a cover body, a connecting seat and dielectric resonators, wherein the cavity body is provided with one or more concave cavities serving as resonance cavities, the cover body is assembled in the cavity body, the connecting seat has electric conduction capacity, and the dielectric resonators are column-shaped, are provided with hole structures, and are arranged in the concave cavities. After the upper portion of each dielectric resonator is fixed on the connecting seat, the upper portion of each dielectric resonator is installed on the lower surface of the cover body, and the bottom of the dielectric resonator is connected with the bottom of each concave cavity. The height produced after the dielectric resonator is fixed with the connecting seat is slightly larger than the distance between the lower surface of the cover and the bottom of the concave cavities, and predeformation is produced on the cover body after the cover body is assembled on the concave cavities. therefore, the TM mold dielectric filter has the advantages of being good in electric performance and good in reliability.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a TM mode dielectric filter. Background technique [0002] TM (Transverse Magnetic, transverse magnetic wave) mode dielectric filter is an important part of the radio frequency filter industry. According to the resonance principle of TM mode dielectric resonator, such as figure 1 As shown, the structure of this type of dielectric filter has the following two basic requirements: 1) The TM dielectric filter requires that the two ends of the dielectric resonator be well grounded with the two ends of the resonant cavity respectively; 2) The dielectric resonator must have at least one end It is necessary to set up an elastic connection mechanism to absorb the deformation of each part due to temperature. Only when the above two requirements are fulfilled can the function of the TM mode dielectric filter be realized structurally. [0003] see figure 2 with image 3 , The prior...

AI Technical Summary

Problems solved by technology

[0004] During the use of this structure, it was found that the brazing structure of the dielectric resonator 206 and the metal cover plate 203 reduces the manufacturability of product maintenance. Once a quality problem occurs in a certain medium, all the medium of the entire product will be scrapped together

In addition, the connection between the elastic metal reed 207 and the resonator 206 and the housing is difficult to achieve electrical requirements such as high insertion loss and high intermodulation.

[0005] In summary, the existing TM mode dielectric filter obviously has inconvenience and defects in actual use, so it is necessary to improve it

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