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TM mode dielectric filter with two grounded ends

A dielectric filter and dielectric resonator technology, applied in waveguide devices, electrical components, circuits, etc., can solve the problems of dielectric resonator temperature change damage, no consideration of assembly and repair, increased cost, etc., and achieve low insertion loss , simple structure and convenient processing

Inactive Publication Date: 2020-07-03
广东省合正行通信科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The realization of good double-terminal grounding has become the key to the TM mode dielectric resonator. However, there are many invention patents and utility model patents on the double-terminal grounding dielectric resonator published on the Chinese Patent Publication Bulletin, whether it is material application or processing. In terms of methods, such as the application of elastic materials, etc., the theoretical design is only completed; and there is a problem in all of them, which does not consider assembly and repair, which increases the cost of subsequent production; there are many uncertain factors in assembly, such as medium If the resonator is not fixed, there will be assembly voltage deviation and other phenomena, and if the resonator is fixed, it will easily cause damage to the dielectric resonator due to temperature changes; therefore, it is urgent to study a TM mode dielectric with low processing and assembly costs and more stable performance than double-ended grounding filter

Method used

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  • TM mode dielectric filter with two grounded ends
  • TM mode dielectric filter with two grounded ends
  • TM mode dielectric filter with two grounded ends

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: Please refer to Figure 1-4 , A double-ended grounded TM mode dielectric filter, including a cavity 9, a TM mode dielectric resonator 7 placed in the cavity 9, and a cover assembly connected to the cavity 9, the top and bottom of the TM mode dielectric resonator 7 There is a baking silver layer; the cavity 9 is a metal inner wall, and radio frequency connectors 8 are installed on the left and right sides of the cavity 9 respectively. The feature is that the cover assembly includes a cover 4 and a lower side of the cover 4 The elastic metal sheet 5 is arranged, and the elastic metal sheet 5 is laminated with the baked silver of the TM-mode dielectric resonator 7 to realize good electrical contact.

[0030] Further, the bottom surface of the cavity 9 is provided with a stepped groove corresponding to the bottom of the TM mode dielectric resonator 7. The stepped groove includes a first-level groove 10 and a second-level groove 12, the bottom of the first-level groo...

Embodiment 2

[0042] Example 2: Please refer to Figure 5 The only difference between this embodiment and embodiment 1 is that the inside of the elastic metal sheet 5 is a ring shape, including a movable part on the periphery and a mounting and fixing part with a groove in the inner ring, and the fixing part is pressed Installed on the mounting boss 404 of the cover plate 4, it will not fall off when the cover plate is installed in the cavity, which reduces installation and maintenance costs and assembly difficulty.

[0043] In summary, the elastic metal sheet of the present invention provides two structural forms. The size of the part fixed on the cover plate is different, and both play the same role. The thickness of the elastic metal sheet mentioned above is the same as the height of the TM-mode dielectric resonator. The size is in a certain relationship. If the elastic metal sheet exceeds the cover plate by 0.1 to 0.2mm after installation, the height dimension of the TM-mode dielectric reso...

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Abstract

The invention discloses a TM mode dielectric filter with two grounded ends. The TM mode dielectric filter comprises a cavity, a TM mode dielectric resonator placed in the cavity and a cover plate assembly connected with the cavity, wherein silver baking layers are arranged at the top and the bottom of the TM mode dielectric resonator, the cavity is a metal inner wall, the left side and the right side of the cavity are respectively provided with a radio frequency connector, and the cover plate assembly comprises a cover plate and an elastic metal sheet arranged on the lower side of the cover plate. According to the invention, due to the fact that the stress degree of the dielectric resonator is limited, the pressure that the dielectric resonator can bear must be considered; the elastic metal sheet is fixed through the cover plate, and the dielectric resonator is pressed, so that the TM mode dielectric resonator bears pressure while the problem of stress release caused by temperature changes is solved; the metal elastic sheet and other elements are ingeniously utilized, so that the metal layer playing a short-circuit role can be well attached to the end surface of the dielectric resonator, the inner surface of the cover plate and the bottom surface of the cavity so as to substantially improve the intermodulation performance and reduce the loss; and the cover plate and the cavityare simple in structure, easy to process and low in cost.

Description

Technical field [0001] The invention relates to the technical field of a TM mode dielectric filter in the communication field, in particular to a double-ended grounded TM mode dielectric filter. Background technique [0002] As a frequency selective device, dielectric filters are widely used in the communication field. In the dielectric filters of base station antenna feed filters, TM-mode dielectric resonators have low loss, high dielectric constant, low frequency temperature coefficient and thermal expansion coefficient, and carry high power , The cost is lower than the TE-mode dielectric resonator, in short, the insertion loss is small, carrying high power, which can achieve what metal resonators cannot do, and the miniaturization is especially worthy of promotion. [0003] The realization of good double-ended grounding has become the key to TM-mode dielectric resonators. However, there are currently a number of invention patents and utility model patents on double-ended grounde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P1/207
CPCH01P1/2002H01P1/207
Inventor 鲁雷叶帆
Owner 广东省合正行通信科技有限责任公司