Circuit board and filter circuit

Abstract

The embodiment of the present invention discloses a circuit board and a filter circuit, wherein the circuit board includes a substrate and a conductive layer arranged on one side of the substrate, a filtering graphic unit is formed on the conductive layer, and the filtering graphic unit A filter circuit is formed; wherein, the filter pattern unit includes: at least two first conductive patterns and a second conductive pattern arranged between two adjacent first conductive patterns, the first conductive pattern and the The second conductive patterns are connected to each other, and a U-shaped groove is opened between the first conductive pattern and the second conductive pattern, so that opposite sides are formed between the first conductive pattern and the second conductive pattern. In the embodiment of the present invention, a filtering pattern unit is formed by patterning the conductive layer, and the filtering pattern unit can be equivalent to a filter circuit, so that the circuit board can filter out interference signals and has a small size.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of filtering, and in particular, to a circuit board and a filtering circuit. Background technique [0002] Grounding is an indispensable part of the antenna of electronic equipment. In the design of the antenna, it must be sufficiently connected with the system ground source (GND), so that the antenna has the corresponding ground source to conduct, so as to obtain effective radiation and emission effects. . However, in the same way, the interference signal is easily transmitted to the antenna through the grounding of the antenna, thereby affecting the quality of wireless communication. [0003] In order to avoid the interference of the interference signal to the antenna, one method can absorb or greatly weaken the interference signal by covering the absorbing material, such as conductive cloth, aluminum foil or conductive foam, etc., but the cost of the absorbing material is high; the ...

AI Technical Summary

Problems solved by technology

But it is also the same, the interference signal is easily transmitted to the antenna through the ground of the antenna, and then affects the quality of wireless communication

[0003] In order to prevent the interference signal from interfering with the antenna, one way is to absorb or greatly weaken the interference signal by attaching a wave-absorbing material, such as conductive cloth, aluminum foil or conductive foam, etc., but the cost of the wave-absorbing material is relatively high; A filter can be installed between the antenna and the ground source, but the size of the existing filter is large, and it needs to occupy a large space, which affects the thin and light design of electronic equipment

Images