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A near field communication antenna device

A near-field communication antenna and coil technology, which is applied to antenna supports/installation devices, antennas, antenna parts, etc., can solve the problems of reducing the area of ​​magnetic materials used, reducing the area of ​​near-field antennas, and large NFC antenna areas, etc. Achieve the effect of reducing manufacturing cost, reducing use area and improving communication effect

Active Publication Date: 2018-04-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can reduce the area of ​​the near-field antenna, and at the same time reduce the area used by magnetic materials, further reduce the cost of the antenna device, and obtain a longer communication distance, which solves the defects of the existing NFC antenna with large area and high cost

Method used

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  • A near field communication antenna device
  • A near field communication antenna device
  • A near field communication antenna device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 2 As shown, make a parallelogram structure antenna with an area of ​​40mm×20mm, design 6 turns, a group of conductors on the opposite side B1 adopts a wide line design, and the line width is 1.2mm; a group of conductors on the opposite side B2 adopts a narrow line design, the line width The width is 0.4mm, the length of the outermost layer of B1 and B2 is 40mm, and the length of the outermost layer of the other two groups of sides is 20mm. The magnetic material is laid under the side B1, and the material laying range completely covers the side B1. The thickness of the magnetic material layer is 0.1mm, the real part of the magnetic permeability of the magnetic material is 150@13.56MHz, and the imaginary part of the magnetic permeability is 2@13.56MHz. Its interlayer structure is as image 3 Shown, where the device shell is omitted.

[0030] Make a parallelogram structure with an area of ​​40mm×20mm. Its four sides are designed with equal width, the lin...

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PUM

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Abstract

A near-field communication antenna device belongs to the field of wireless communication. The antenna device includes a coil conductor, a magnetic material layer and an intermediate conductor layer. The winding center of the coil to which the coil conductor belongs is a polygonal structure, and the polygonal structure includes at least one set of opposite sides. One group of opposite sides is designed with wide lines, and the other group is designed with narrow lines, and the length of at least one side of the opposite sides with wide and narrow design should be greater than the length of the other sides. The magnetic material layer is disposed between the coil conductor and the intermediate conductor layer, and the magnetic material layer covers the designed side of the wide line in the coil conductor, but does not cover the designed side of the narrow line. The antenna device of the invention reduces the area of ​​the antenna and reduces the manufacturing cost of the antenna.

Description

technical field [0001] The invention relates to an antenna device used in an RFID system, an NFC system, and a short-distance wireless communication system for communicating with a counterpart device through an electromagnetic field signal. Background technique [0002] In recent years, with the continuous promotion and use of RFID systems and NFC systems, in order to communicate between mobile electronic devices or between mobile electronic devices and basic card reading devices, various devices, especially handheld mobile electronic devices, are equipped with NFC system Communication Antenna. Most of the existing RFID or NFC antennas are installed inside the casing of the mobile device. [0003] Among many communication antennas, NFC antennas or near-field communication antennas have a large antenna area because of their low operating frequency, and are often the largest antennas in communication equipment, which leads to high manufacturing costs of such antennas, which i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/22H01Q1/24H01Q1/38H01Q7/06
CPCH01Q1/2216H01Q1/243H01Q1/38H01Q7/06
Inventor 梁迪飞李维佳阙志勇陈良谢建良邓龙江
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA