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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.

Active Publication Date: 2012-10-31
SHENZHEN GRENTECH RF COMM LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[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 requirements at the same time
The silver electrode filter has a single design method, which cannot achieve diversity, is difficult to achieve transmission zero point, poor out-of-band suppression, low Q value, high processing accuracy requirements, difficult debugging, and difficult to meet the high performance requirements of the filter

Method used

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Embodiment Construction

[0021] refer to figure 2 , The TEM mode dielectric filter provided by an embodiment of the present invention includes a cavity 210 and its cover plate 240, a dielectric resonator 220, a coupling line 230, a resonance column 250, and the like. The cavity 210 has several resonant cavities for installing dielectric resonators 220 . Each dielectric resonator 220 represents a resonant unit, and the dielectric resonator 220 can be fixed on the cavity 210 by welding or other means, and the dielectric resonator 220 is connected by a coupling line 230 for energy transmission, and the cover plate 240 is connected by screws Fastened with the cavity 210, the cover plate 240 is provided with a tuning screw 250 for frequency tuning.

[0022] refer to image 3 , the TEM mode dielectric resonator 220 provided in this embodiment includes: a dielectric body 221 with a through hole 222 in the middle. The tuning screw 250 extends into the through hole 222 for frequency tuning. An end surface...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/205
Inventor 肖利蒙吴建汪邢章红张育鸿
Owner SHENZHEN GRENTECH RF COMM LTD
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