Planar two-arm axial-mode helix antenna suitable for radio-frequency identification label

A technology of radio frequency identification tags and helical antennas, applied in the field of radio frequency identification, can solve the problems of RFID tags not being recognized normally, changing the resonance state and radiation pattern of the tag antenna, and achieving compact structure, small mutual coupling interference, and good end-fire characteristics Effect

CN106961002AInactive Publication Date: 2017-07-18NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a planar two-arm axial-mode helix antenna suitable for a radio-frequency identification label. The planar two-arm axial-mode helix antenna comprises a dielectric plate, a planar two-arm axial-mode helical structure having an end-fire characteristic and an RFID label chip; a first microstrip line, a second microstrip line and a third microstrip line on the front side of the RFID label, and a fourth microstrip line and a fifth microstrip line on the back side of the RFID label form the planar two-arm axial-mode helical structure having the end-fire characteristic in a helical surrounding manner through three corresponding metalized through holes. The planar two-arm axial-mode helix antenna has a good end-fire characteristic, and can be matched with the RFID label chip easily, and is compact in structure and simple in production process, and the mutual coupling interference is small when multiple RFID labels are arranged.
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Description

technical field

[0001] The invention relates to a planar double-arm axial-mode helical antenna suitable for radio frequency identification tags, and belongs to the technical field of radio frequency identification. Background technique

[0002] Radio Frequency Identification (RFID) is a non-contact automatic identification system implemented by radio frequency. The RFID system generally consists of RFID tags, readers and application software systems. At present, the radio frequency identification system includes four frequency bands: low frequency, high frequency, ultra high frequency and microwave. Among them, UHF is widely used because of its moderate frequency. The frequency range of the global UHF (Ultra High Frequency, UHF) identification system covers 840MHz-960MHz, including the frequency range of 840MHz-845MHz and 925MHz-930MHz of the Chinese standard, the frequency range of 865MHz-868MHz of the European standard and the frequency range of the American standard 90...

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Embodiment Construction

[0023] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention but not to limit the scope of the present invention.

[0024] figure 1 It is a schematic diagram of the structure of the present invention. It can be seen from the accompanying drawings that the planar dual-arm axial mode helical antenna suitable for radio frequency identification tags includes: a dielectric plate, a planar dual-arm axial mode helical structure forming end-fire characteristics, and an RFID tag chip ; The planar double-arm axial mode spiral structure that constitutes the end-fire characteristic includes a first microstrip line, a second microstrip line and a third microstrip line arranged on the upper surface of the dielectric plate, and a microstrip line arranged on the lower surface of the dielectric plate The fourt...