Low-pass filter

A technology of low-pass filter and metal through hole, which is applied in the direction of impedance network, electrical components, multi-terminal pair network, etc., can solve the problems of poor filtering effect, improve Q value and self-resonant frequency point, reduce parasitic inductance, improve The effect of the filter effect

Active Publication Date: 2020-06-09
XI AN FIBOCOM WIRELESS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Based on this, it is necessary to provide a low-pass filter that can improve the filtering effect in view of the technical problem of poor filtering effect in the traditional low-pass filter

Method used

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Embodiment Construction

[0050] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. A preferred embodiment of the application is shown in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0051] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to and integrally integrated with the other element, or there may be an intervening element at the same time. The terms "disposed", "formed at", "input electrode", "output electrode", "first electrode", "second electrode" and similar expressions are used herein for the purpose of description only. In the present application, "plurality" may be at ...

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Abstract

The application relates to a low-pass filter comprising a body, a capacitor, and an inductor. The body comprises a grounding electrode, a capacitor layer and an inductor layer which are stacked in sequence; the capacitor layer comprises stacked first dielectric substrates; and the inductor layer comprises stacked second dielectric substrates. The capacitor comprises a first polar plate and a second polar plate which are arranged in an interdigital manner; the first polar plate and the second polar plate are respectively formed on different first dielectric substrates; and the first polar plateis electrically connected with the grounding electrode through at least two metal through holes. The inductor comprises at least two annular conductors; the annular conductors are respectively formedon different second dielectric substrates and are electrically connected in sequence through the metal through holes; any annular conductor is electrically connected with the second polar plate, so that Q values and self-resonant frequency points of the capacitor and the inductor can be improved, the insertion loss of the low-pass filter is reduced, the rectangular coefficient of the filter is improved, and the filtering effect is improved.

Description

technical field [0001] The present application relates to the technical field of electronic devices, in particular to a low-pass filter. Background technique [0002] With the development of the technical field of electronic devices, the development of filters has shifted to low cost, miniaturization and high frequency bands. Although existing microstrip filters, SAW (Surface Acoustic Wave) / BAW (Bulk Acoustic Wave) filters, and dielectric filters can meet the above requirements, the inherent shortcomings of each type of filter are difficult to overcome. For example, the SAW filter has a large insertion loss and cannot be used in high frequency bands; the dielectric filter has a large volume; the LC has a simple structure, but occupies a large area and has average performance. [0003] With the wide application of electronic systems in the fields of communication and aerospace, the whole system has higher and higher requirements for circuit integration, stability, and multi-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/01
CPCH03H7/0138H03H7/0153H03H7/0115H03H7/1741
Inventor 王璐
Owner XI AN FIBOCOM WIRELESS INC
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