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Multimode mixed medium structure used in filter

A mixed medium and filter technology, applied in the field of communication, can solve the problems of high cost, volume reduction and little improvement, and achieve the effects of high Q value, reducing heat generation, and ensuring structural reliability

Active Publication Date: 2018-07-27
HONGKONG FINGU DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional TE and TM mode dielectric filters mostly use single-mode dielectric resonance. Although this method can meet the performance requirements, the cost is high and the volume reduction is not much improved.

Method used

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  • Multimode mixed medium structure used in filter
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  • Multimode mixed medium structure used in filter

Examples

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Embodiment example

[0042] A 6-cavity filter designed according to dual-mode technology. When the length, width and height are 54.5mm*60mm*28.5mm, the input and output single cavities are traditional metal cavities, and the middle two cavities are dielectric dual-mode cavities. The volume of the cavity is 28.5*28.5*28.5, and the dielectric constant of the dielectric resonance block is 43, the first dielectric block and the second dielectric block are made of plastic material, the dielectric constant is 3, the middle is a through hole, and the Q value of dual-mode and single-mode 8000, metal single cavity Q value is 2800, the insertion loss of this filter is 0.23dB in the frequency band of 1805MHz-1880MHz, and the suppression of the passband to 1710MHZ-1785MHz is 50dB, such as Image 6 Shown is a simulated graph.

[0043] Similarly, when the 6-cavity TM single-mode filter is in the 1805MHz-1880MHz frequency band, when the insertion loss is 0.23dB, and the passband suppression of 1710MHZ-1785MHz is...

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Abstract

The invention discloses a multimode mixed medium structure used in a filter. The structure comprises a cavity and a cover plate, wherein the cavity is internally provided with a mixed medium resonancerod composed of a medium resonance block, a first medium block and a second medium block, the ratio of the radial dimension of the mixed medium resonance rod to that of the cavity is in a range of 0.9-0.99, the ratio of the depth dimension of the cavity to the height dimensions of the first medium block and second medium block is in a range of 22-50, and a degeneration dual mode is formed in an x-axis direction and y-axis direction of the cavity. The multimode mixed medium structure used in the filter has the advantages that the mixed medium resonance rod and a cavity body cooperate with eachother to form the dual mode structure by setting a specific parameter between the mixed medium resonance rod and the cavity body, the structure is simple, the filter formed by the dual-mode mixed medium resonance structure not only can reduce the overall insertion loss of the filter, but also can reduce the volume of the filter, and provide a Q value higher than conventional TM single-mode resonance.

Description

technical field [0001] The invention belongs to the base station filter, antenna feeder filter, combiner and anti-interference filter etc. used in the technical field of communication, which can be band-pass, band-stop, high-pass, low-pass, and specifically relates to a filter applied to Multimodal mixed-media structures in . Background technique [0002] With the rapid development of the fourth-generation mobile communication to the fifth-generation mobile communication, the requirements for high performance and miniaturization of communication equipment are increasing, and the use of dielectric filters is gradually becoming more frequent. The traditional TE and TM mode dielectric filters mostly adopt the single-mode dielectric resonance method. Although this method can meet the performance requirements, the cost is high, and the volume reduction has little improvement. Contents of the invention [0003] The purpose of the present invention is to solve the shortcomings o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P7/06H01P7/10
CPCH01P1/2002H01P7/06H01P7/105H01P1/2086
Inventor 孟庆南
Owner HONGKONG FINGU DEV CO LTD