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NFC antenna with metal rear casing

A metal back shell and antenna technology, applied in the field of communication, can solve the problems of complex process and unsightly structure, and achieve the effect of simple processing technology, superior performance and enhanced antenna performance.

Active Publication Date: 2015-10-14
SHENZHEN SUNWAY COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two slits in this plan cut the complete metal back shell into two parts, the structure is very unsightly, and the two parts of the metal back shell need to be processed separately, and the process is complicated

Method used

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  • NFC antenna with metal rear casing

Examples

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Effect test

Embodiment 1

[0027] Please refer to figure 2 , Embodiment 1 of the present invention is: an NFC antenna with a metal back shell, including a metal back shell 1 and an antenna coil 2, the metal back shell is an all-metal back shell, and the metal back shell includes a first pass The hole 3 and the second through hole 4, the first through hole 3 shown in the figure is located below the second through hole 4, in fact, the two can also exchange positions, and even the two can be in a left-right positional relationship; the first The through hole and the second through hole can be used to respectively install a fingerprint recognition module, a camera module, a flash module or other sensor modules; The first through hole 3 is set, and the metal back shell is also provided with a first gap 5, the first gap connects the first through hole 3 and the second through hole 4, the first gap 5 and the antenna coil 2 One side intersects.

[0028] The performance of the NFC antenna is related to the si...

Embodiment 2

[0031] Please refer to Figure 4 , Embodiment 2 of the present invention is to further increase through holes on the basis of Embodiment 1, such as 3, 4, 5 through holes, and multiple through holes can be connected through multiple gaps; NFC antenna coil can be set around any via, but usually choose the largest via for better performance. Figure 4 Shown is the case of three through holes, the three through holes can be a combination of fingerprint identification through holes, camera through holes and flash light through holes, and a second gap 7 can be set between the second through hole 4 and the third through hole 6 . It should be pointed out here that the first slit 5 in the up-down direction must be opened, while the second slit 7 in the left-right direction may not be opened. However, compared with the situation without the second slot 7, the performance of the NFC antenna will be enhanced with the second slot 7. Figure 5 For the NFC antenna simulation results of th...

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PUM

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Abstract

The invention discloses an NFC antenna with a metal rear casing. The NFC antenna comprises the metal rear casing and an antenna coil. The metal rear casing comprises a first through hole and a second through hole. The antenna coil is located inside the metal rear casing and is around the first through hole. The metal rear casing is provided with a first slot. The first slot is connected with the first through hole and the second through hole. The slot is connected with the through holes to change vortex flow distribution and at the same time eliminate the shielding effect of the metal rear casing on the NFC antenna. Vortex in the same direction as the antenna on the metal casing body is used to enhance the performance of the antenna. The NFC antenna provided by the invention has the advantages of beautiful structure, simple production process, superior performance and the like.

Description

technical field [0001] The invention relates to the communication field, in particular to an NFC antenna with a metal back shell. Background technique [0002] With the development of the communication function of mobile devices at the present stage, NFC antennas have gradually become the objects favored by customers, so more and more attention has been paid to the research on the design of NFC antennas. Generally choose to put the NFC antenna on the battery, and add a piece of ferrite to get better performance. Recently, with the popularity of consumers, mobile devices with metal back shells have become popular, which brings greater difficulty to the design of NFC antennas. Such as figure 1 As shown, because when the NFC antenna is placed directly behind the metal shell, an eddy current I completely opposite to the current of the NFC antenna is generated on the metal back shell, and the antenna cannot be detected due to this completely reversed eddy current. [0003] Aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/24H01Q7/00
Inventor 陈浩赵安平徐雨王翟谷媛牛宝星尹鸿焰
Owner SHENZHEN SUNWAY COMM
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