Miniaturized near-field communication antenna and mobile terminal

Abstract

The invention discloses a miniaturized near field communication antenna and a mobile terminal. The antenna comprises a planar coil embedded in a substrate, and the planar coil comprises a first part wire and a second part wire which are oppositely arranged, wherein the diameter of the first part wire is greater than the diameter of the second wire part. A magnetic piece and a magnetic induction line cutting piece are arranged on the two side faces of the base plate respectively, and the magnetic piece covers the area where a thick wire is located and is used for compressing useful magnetic induction lines close to the magnetic piece into the magnetic piece so as to compress useful magnetic field space to enable a magnetic field to be located on one side of the magnetic piece. The magneticinduction wire cutting piece covers the area where a thin wire is located, and is used for cutting magnetic induction lines generated by the thin wire and destroying a useless magnetic field, therebyavoiding the phenomenon that magnetic induction lines which are relatively close and opposite in direction cancel each other, improving the emission energy of the miniaturized near-field antenna during card reading and writing and card simulation, improving the overall performance of the antenna, and further achieving the miniaturization of the near-field antenna so as to be suitable for small electronic equipment.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a miniaturized near-field communication antenna and a mobile terminal. Background technique [0002] Near Field Communication (Near Field Communication) is an emerging technology. Devices using near field communication technology (such as mobile phones) can exchange data when they are close to each other. It is a non-contact radio frequency identification (RFID) and The integration of interconnection and intercommunication technology has evolved. By integrating the functions of inductive card readers, inductive cards and point-to-point communication on a single chip, mobile terminals are used to realize applications such as mobile payment, electronic ticketing, access control, mobile identification, and anti-counterfeiting. The near-field communication service combines near-field communication technology and mobile communication technology to realize various functions such as electronic p...

AI Technical Summary

Problems solved by technology

When the planar coil is energized, such as figure 1 As shown, the current direction between relatively close wires is opposite, and the direction of the magnetic field lines generated is opposite. The magnetic field lines in the overlapping area of ​​the magnetic field lines cancel each other out, which affects the energy emitted by the antenna when reading and writing cards and card simulation. affect the overall performance of the near-field antenna

[0005] Of course, there are also miniaturized near-field antennas that use magnetic sheets to cover all the planar coils, but they cannot effectively solve the above problems.

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