Electronic device having miniaturized near field communication antenna

Abstract

The invention discloses an electronic device with a miniaturized near-field communication antenna. The miniaturized near-field communication antenna comprises a substrate, a coil which is embedded inthe substrate and formed by coiling a wire, and a magnetic sheet attached to one surface of the substrate; the coil at least comprises a first part wire and a second part wire which are oppositely arranged, wherein the wire diameter of the first part wire is larger than that of the second part wire; and the magnetic sheet covers the area where the first part wire is located. The electronic devicefurther comprises a magnetism breaking assembly matched with the miniaturized near-field communication antenna, and the magnetism breaking assembly and the substrate are arranged on the two sides of the magnetic sheet respectively. The electronic device with the miniaturized near-field communication antenna can effectively avoid the mutual offset of magnetic lines of force in opposite directions generated between wires which are relatively close to each other and have opposite current directions; therefore, the emission energy of the miniaturized near-field antenna during card reading and writing and card simulation is improved, the overall performance of the near-field antenna is improved, the miniaturization of the near-field antenna is further realized, and the miniaturized near-field antenna is suitable for small electronic equipment.

Description

technical field [0001] The invention relates to the field of antennas, in particular to an electronic device with a miniaturized near-field communication antenna. 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 electron...

AI Technical Summary

Problems solved by technology

When the coil is energized, such as figure 1 As shown, the current direction between relatively close wires is opposite, and the direction of the generated magnetic force lines is opposite. The magnetic force lines in the area where the magnetic force lines overlap cancel each other out, which affects the transmitted energy of the antenna when reading and writing cards and card simulation, thus affecting the near-field antenna. overall performance

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

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