TM (transverse magnetic)-mode dielectric filter

A dielectric filter and dielectric resonator technology, applied in waveguide devices, electrical components, circuits, etc., can solve the problems of fatigue fracture of solder joints, affecting the service life and performance of filters, etc., to prolong the service life and solve the problems of soldering Point fatigue fracture, the effect of improving the reliability of solder joints

Inactive Publication Date: 2014-08-06
HUAWEI MACHINERY
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  • Abstract
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Problems solved by technology

However, since the dielectric resonator is a ceramic material, its thermal expansion coefficient is about 10, while the filter cavity and cover plate are generally made of aluminum alloy, and its thermal expansion coefficient is about 23. After the dielectric double-ended welding is assembled, the thermal expansion coefficient of the two is very different. It will lead to fatigue fracture of solder joints after welding cooling, which will affect the service life and performance of filter products

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  • TM (transverse magnetic)-mode dielectric filter
  • TM (transverse magnetic)-mode dielectric filter
  • TM (transverse magnetic)-mode dielectric filter

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Embodiment Construction

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] see figure 1 , the present invention provides a TM mode dielectric filter 100, which belongs to the double-end welded TM mode dielectric filter, which includes a housing 10 with an opening 12, a cover plate 15, a dielectric resonator 20 and an installation layer (not shown in the figure ). The cover plate 15 covers the opening 12 side of the casing 10 . The installation layer is installed on the casing 10 . The dielectric resonator 20 is locat...

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Abstract

The invention provides a TM (transverse magnetic)-mode dielectric filter which comprises a shell, a cover plate, a dielectric filter and a mounting layer. An opening is formed in the shell, the cover plate covers the opening side of the shell, the mounting layer is arranged on the shell, the dielectric filter is positioned between the cover plate and the shell, two opposite ends of the dielectric filter are respectively welded with the cover plate and the mounting layer, and a thermal expansion coefficient of the mounting layer and a thermal expansion coefficient of the cover plate range from a thermal expansion coefficient of the shell and a thermal expansion coefficient of the dielectric filter.

Description

technical field [0001] The invention relates to a TM mode dielectric filter. Background technique [0002] With the miniaturization of wireless base stations, the requirements for the miniaturization of filters are getting higher and higher. The double-ended welded transverse magnetic wave mode dielectric filter (referred to as TM mode dielectric filter) which can significantly reduce the volume of the filter and the conventional Cavity resonators have the advantages of small size, low loss, and high temperature stability. This kind of double-end welded TM mode dielectric filter requires that the upper and lower ends of the dielectric resonator be welded to the cover plate and the bottom of the cavity respectively, and the cover plate and the cavity are welded or screwed; thus realizing the double-end welded TM mode One of the core technologies of dielectric filters is that the double ends of the dielectric require reliable welding assembly technology. However, since the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/201H01P1/207
Inventor 李金艳何大鹏吴正旺
Owner HUAWEI MACHINERY
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