NFC (Near Field Communication) antenna and mobile phone using same

Abstract

The invention provides an NFC (Near Field Communication) antenna and a mobile phone using the same, wherein the antenna comprises two NFC antenna coils which are spliced at the same plane through two parallel double-conductor lines; and a feed end connected with an antenna matching circuit is led out from the middle points of the parallel double-conductor lines respectively. The mobile phone comprises a mobile phone PCB (Printed Circuit Board) main board, an NFC chip, an antenna matching circuit and an NFC antenna. According to the NFC antenna and the mobile phone provided by the invention, two NFC antenna coils are set, two NFC antenna coils are spliced at the same plane by using two parallel double-conductor lines, and the feed end connected with the antenna matching circuit is led out from the middle points of the parallel double-conductor lines respectively, thus adding and number of windings of the antenna coils, the magnetic induction intensity can be strengthened by the antenna without increasing ferrite materials or turns of the antenna coil, and the thickness and manufacturing cost of the mobile phone are reduced effectively.

Description

technical field [0001] The invention relates to the technical field of wireless mobile communication, in particular to an NFC antenna and a mobile phone using the antenna. Background technique [0002] NFC (Near Field Communication) is a short-range non-contact communication technology, which combines non-contact sensing and wireless connection technology, and works in the 13.56MHz frequency band. Compared with other short-distance wireless communication technologies, NFC technology is safer and has a shorter response time, so it is very suitable as an electronic wallet technology in a wireless transmission environment. A series of cards such as bank cards, credit cards, point cards, and traffic cards can be integrated on a mobile phone for easy portability and management. [0003] Since the NFC frequency band uses 13.56MHz, the size of the NFC antenna is required to be large, which limits the design space of the mobile phone. And because the electronic wallet technology r...

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Problems solved by technology

[0003] Since the NFC frequency band uses 13.56MHz, the size of the NFC antenna is required to be large, which limits the design space of the mobile phone

And because the electronic wallet technology requires the antenna to generate a certain magnetic field induction intensity, and the magnetic field induction intensity must be within a certain spatial range and angle, so this requirement also limits the design space of the mobile phone.

[0004] In order to use the NFC antenna in the limited mobile phone space, it is usually used to load ferrite material on the NFC antenna coil or increase the number of turns of the NFC antenna coil to enhance the magnetic field induction strength. This method not only increases the thickness of the mobile phone, but also increases the thickness of the mobile phone. cost of production

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