Medium filter

A dielectric filter and dielectric resonator technology, applied in waveguide devices, electrical components, circuits, etc., can solve problems such as low Q value, inability to achieve diversity, single design method of silver electrode filter, etc.
CN102760923AActive Publication Date: 2012-10-31SHENZHEN GRENTECH RF COMM LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN GRENTECH RF COMM LTD
Publication Date
2012-10-31

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Abstract

The invention relates to a medium filter, which comprises a cavity (210) and a medium resonator (220), wherein the medium resonator (220) is fixed on the cavity (210); the medium resonator (220) comprises a columnar medium body; the middle of the medium resonator (220) is provided with a through hole (222); one end face of the columnar medium body is provided with an end face electrode (223) and a coupling electrode (224); the end face electrode (223) is positioned around the through hole (222); the coupling electrode (224) is separated from the end face electrode (223); the outer surface (225) of the columnar medium body is covered by a protective layer (25), a metal layer (226), the end face electrode (223) and the coupling electrode (224); the protective layer (225) is positioned on the end face of the columnar medium body which is provided with the end face electrode (223) and the coupling electrode (224); and the metal layer (226) is covered on the peripheral surface of the columnar medium body, and is separated from the coupling electrode (224). The medium filter is easy for realizing transmission zero points, out-of-band rejection is increased, and the Q value is increased.
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Description

【Technical field】

[0001] The invention relates to the field of microwave communication, in particular to a dielectric filter. 【Background technique】

[0002] Filters are key components in various mobile communication systems and are used to filter out clutter or interference signals outside the frequency of communication signals. The continuous improvement of the performance of the communication system puts forward higher requirements for the filter, which requires the filter to have low loss, small size and light weight. TEM mode dielectric filters can be made very small because they can use dielectric materials with high dielectric constants, and are widely used in various devices.

[0003] The existing TEM (transverse electromagnetic) mode dielectric filter is generally assembled with a single silver electrode, such as figure 1 As shown, the single-electrode filter has many disadvantages in practical applications, and cannot meet the performance and reliability requirem...

Claims

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