Filter

A filter and microstrip line technology, applied in the field of signal processing devices, can solve problems such as unfavorable signal communication, and achieve the effects of reducing noise interference, strong filtering efficiency, and small size

Active Publication Date: 2018-11-02
NANNING FUGUI PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few components used to filter out signals in the frequency band of 3.4GHz-3.6GHz (that is, the frequency band where LTE frequency band 42 is located), which is not conducive to signal communication

Method used

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Embodiment Construction

[0045] see figure 1 , figure 1 It is a schematic diagram of an embodiment of the filter of the present invention.

[0046] The filter of the present invention is arranged on the substrate and is used for filtering signals to filter out signals in the 3.4GHz-3.6GHz frequency band and suppress noise interference in other frequency bands (such as 2.4GHz). The substrate is a commonly used printed circuit board (PCB, Printed Circuit Board), and its electrical characteristics can be selected according to the frequency of the signal to be suppressed. For example, choose the most commonly used glass fiber epoxy resin copper clad laminate (FR-4 copper clad laminate). like figure 1 As shown, the filter includes a first part 10 , a second part 20 , a first coupling part 30 and a second coupling part 40 .

[0047] Among them, the first part 10 is used for feeding in signals. The second part 20 is used for outputting signals. The first part 10 is not electrically connected to the sec...

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Abstract

Disclosed is a filter which is arranged on a substrate; the filter comprises a first part, a second part, a first coupling part and a second coupling part, wherein first part is used for feeding a signal; the second part is used for outputting a signal; the first part is not electrically connected with the second part through a conductor; a surrounding space is defined by the first part and the second part; the first coupling part is arranged in the surrounding space; the first coupling part is not electrically connected with the first part and the second part through a conductor, and is usedfor coupling a feed-in signal; and the second coupling part is arranged in the surrounding space, and the second coupling part is not electrically connected with the first part, the second part and the first coupling part through a conductor, and is used for coupling a feed-in signal. The filter provided by the invention is very small in size, and shows strong filtering efficiency in a limited space; and by virtue of the filter, noise interference in a frequency band is lowered, and design of thin and short products is facilitated.

Description

technical field [0001] The invention relates to a signal processing device, in particular to a filter. Background technique [0002] At this stage, most mobile phones or tablet computers have multi-band communication modes, such as 2.4G WIFI (Wireless-Fidelity, wireless fidelity) and 3.5G LTE (Long Term Evolution, long-term evolution). However, there are very few components used to filter out signals in the frequency band of 3.4GHz-3.6GHz (that is, the frequency band where LTE frequency band 42 is located), which is not conducive to signal communication. Contents of the invention [0003] In view of this, it is necessary to provide a bandpass filter to solve the above disadvantages. [0004] A filter provided by an embodiment of the present invention is disposed on a substrate and includes: a first part, a second part, a first coupling part and a second coupling part. Among them, the first part is used to feed the signal. The second part is used for outputting signals, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
CPCH01P1/20354
Inventor 许铭显
Owner NANNING FUGUI PRECISION IND CO LTD
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