TM mode dielectric filter

A dielectric filter and filter technology, applied in the field of communication, can solve problems such as short service life, achieve the effect of improving service life and performance, and reducing thermal expansion coefficient

Inactive Publication Date: 2016-07-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a TM mode dielectric filter, w

Method used

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Embodiment 1

[0030] The alloy material is formed by liquid extrusion casting of various raw materials under high temperature conditions. The components of the alloy material and the weight percentages of each component are: 20.0% silicon, 2.0% magnesium, 1.0% iron, manganese 1.0%, impurity 1.0%, aluminum 75.0%. Its coefficient of thermal expansion is 18.5×10 -6 / ℃, the thermal conductivity is 170.8W / m·K, and the yield strength is 160.2MPa.

Embodiment 2

[0032] The alloy material is formed by liquid extrusion casting of various raw materials under high temperature conditions. The components of the alloy material and the weight percentages of each component are: silicon 27%; magnesium 0.5%; iron 0.6%; manganese 0.5%; aluminum 71.4%. Its coefficient of thermal expansion is 16.0×10 -6 / ℃, the thermal conductivity is 150.8W / m·K, and the yield strength is 157.5MPa.

Embodiment 3

[0034] The alloy material is formed by liquid extrusion casting of various raw materials under high temperature conditions. The components of the aluminum-silicon alloy and the weight percentages of each component are: 32% silicon; 0.35% magnesium; 0.3% iron; Manganese 0.35%; Aluminum 67%. Its coefficient of thermal expansion is 14.8×10 -6 / ℃, the thermal conductivity is 147W / m·K, and the yield strength is 152.5MPa.

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Abstract

The invention discloses a TM mode dielectric filter, and the filter comprises a filter housing and a dielectric resonator disposed in the filtering housing. The filter housing comprises a bottom plate, a cover plate, and side walls connected with the bottom plate and the cover plate. The dielectric resonator is fixedly connected with the bottom plate in a contact manner. The filter is characterized in that the bottom plate is made of an alloy material, and the alloy material contains the following components by mass percentage: 20.0%-39.0% of Si, 0.1%-1.0% of Mg, 0.1%-2.0% of Fe, 0.1%-1.0% of Mn, 0%-1.0% of foreign matters, and a remaining part (Al). The bottom of the filter housing is made of the above alloy material, reduces the thermal expansion coefficient of the bottom plate, prolongs the service life of the filter, and improves the performance of the filter.

Description

technical field [0001] The invention relates to the communication field, in particular to a TM mode dielectric filter. Background technique [0002] At present, in wireless communication base station systems, double-ended welded transverse magnetic wave mode dielectric filters (TM mode dielectric filters for short) are often used as RF front-end devices to reduce base station emission spurs and external interference. This kind of double-end welding type TM mode dielectric filter requires the upper and lower ends of the dielectric resonator to be welded to the cover plate and the bottom of the cavity respectively, but the reliability of the double-end welding of the dielectric resonator restricts the application of the TM mode dielectric filter. . [0003] Since the dielectric resonator is a ceramic material, its thermal expansion coefficient is about 1.0×10 -5 / °C, and the filter cavity and cover are generally made of aluminum alloy, and the thermal expansion coefficient o...

Claims

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Application Information

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IPC IPC(8): H01P1/207
Inventor 刘金郑华伟
Owner ZTE CORP
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