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A broadband surface-mount emi filter for suppressing electromagnetic interference

An electromagnetic interference and broadband technology, applied in the field of broadband surface-mount EMI filters, can solve the problems of large size, poor high-frequency characteristics, and narrow filtering frequency range

Active Publication Date: 2017-12-29
北京航天微电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a wide-band surface-mounted EMI filter for suppressing electromagnetic interference, which solves the problems of large product volume, narrow filtering frequency range and poor high-frequency characteristics in the prior art

Method used

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  • A broadband surface-mount emi filter for suppressing electromagnetic interference
  • A broadband surface-mount emi filter for suppressing electromagnetic interference

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Experimental program
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Embodiment Construction

[0013] A wide-band surface-mount EMI filter for suppressing electromagnetic interference includes a tube case 1, and is characterized in that it also includes: a choke coil 3, a capacitor 2 and a printed circuit board 4.

[0014] The shell 1 is a hollow rectangular tubular shell, and the two open ends of the shell are respectively sealed by sintered insulators with pins, and one end is defined as an input end, and the other end is an output end; the printed circuit board 4 is an FR-4 double-sided metal sheet with a circuit printed on the surface, and the printed circuit board 4 is pasted on the bottom of the hollow cavity of the casing 1 and connected to the input pin and the output pin of the casing 1; The choke coil 3 is a magnetic ring structure wound by an enameled wire, and is welded on the center of the printed circuit board 4 through a lead wire; the capacitor 2 is an X2Y capacitor in which the inner electrodes of the "X" capacitor and the "Y" capacitor are combined, and...

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Abstract

The invention discloses a wide-band surface mount EMI filter for suppressing electromagnetic interference, which includes a tube shell (1), and also includes: a choke coil (3), a capacitor (2) and a printed circuit board (4); The two ends of the shell (1) are sealed by insulators, the printed circuit board (4) is pasted on the bottom of the hollow cavity of the shell (1), and the choke coil (3) is welded at the center of the printed circuit board (4) , There are 4 capacitors (2), two of which are located between the input terminal of the tube case and the choke coil, and the other two are located between the choke coil and the output terminal of the tube case. The filter of the invention has the advantages of small volume, wide filtering frequency range, good suppression effect of high-frequency electromagnetic interference, and good application prospect.

Description

technical field [0001] The invention relates to a broadband surface-mounted EMI filter, in particular to a broadband surface-mounted EMI filter for suppressing electromagnetic interference. Background technique [0002] EMI filter is the product of the development of electromagnetic compatibility, and it is the first choice and necessary device to solve electromagnetic interference and realize electromagnetic compatibility. On the five-dimensional integrated battlefield of "land, sea, air, space, and magnetism", both the enemy and the enemy will use a large number of electronic equipment, the electromagnetic environment of the battlefield will be very complex, and the problem of electromagnetic compatibility will become more and more prominent. Electromagnetic compatibility means that in the electromagnetic environment of the same battlefield, various combat equipment can perform their own combat functions, and each equipment and subsystem can work normally without interfere...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H7/01
Inventor 冀兴军杨赤如王永安段斌赵宏忠
Owner 北京航天微电科技有限公司
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