UHF electronic tag antenna
An electronic tag and ultra-high frequency technology, applied in the direction of slot antenna, antenna support/mounting device, circuit, etc., can solve the problems of difficult impedance matching, unfavorable popularization and application, narrow bandwidth, etc., and achieve simplified production and debugging, structure Simple and firm, simple manufacturing and processing effects
Active Publication Date: 2018-09-21
CHANGZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER +2
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Problems solved by technology
[0005] At present, some common tag antennas such as folded dipole antennas, V-shaped dipole antennas, inverted F-shaped antennas, and fractal antennas, etc., the contours of these antennas are mostly the deformation of half-wave oscillators, and the length is about half of the wavelength. It is slightly larger, impedance matching is not easy and inconvenient, and their narrow bandwidth is difficult to integrate, so it is not conducive to the popularization and application of RFID technology
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Embodiment 1）
[0027] See figure 1 and figure 2 , the UHF electronic tag antenna of this embodiment is mainly composed of a dielectric substrate 1 and a patch antenna 2 .
[0028] The dielectric substrate 1 is a rectangular plate body.
[0029] According to the antenna principle, λg is the wavelength on the antenna, λ is the wavelength of free space, εr is the relative permittivity of the dielectric substrate, λg=λ / , it can be seen that the size of the antenna is positively correlated with λg. Therefore, the size of the antenna can be effectively reduced by selecting an appropriate substrate.
[0030] In this embodiment, the size of the dielectric substrate 1 is preferably 98 mm long×30 mm wide×0.6 mm thick in this embodiment. Material of the Dielectric Substrate 1 In this embodiment, an epoxy resin glass fiber substrate (FR4) is preferably used. The dielectric constant of the dielectric substrate 1 relative to air is 4.6 and the dielectric loss tangent is 0.02.
[0031] The patch an...
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The invention provides an ultrahigh frequency electronic label antenna. The ultrahigh frequency electronic label antenna comprises a dielectric substrate and a patch antenna, wherein the dielectric substrate is a rectangular plate piece; the patch antenna comprises a main body, a first bulge part and a second bulge part; the overall main body is a rectangular plate; a hollow rectangular radiation gap is formed at the central position of the main body in the sideways; a feed port is arranged at the lower end of the central position of the main body in the sideways, and the upper end of the feed port is communicated with the radiation gap; both the first and second bulge parts are rectangular plates, and are arranged at the lower part of the left and right sides of the main body respectively and are connected with the main body integrally; and the patch antenna is fixedly arranged on the front end surface of the dielectric substrate. The ultrahigh frequency electronic label antenna has the advantages of being simple in structure, being low in manufacturing costs, being easy to realize mass production, being wide in applicability, and being able to realize good impedance match with a matched label chip conveniently during the using process.
Description
technical field [0001] The invention relates to the technical field of electronic tags, in particular to an ultra-high frequency electronic tag antenna. Background technique [0002] Ultra-high frequency radio frequency identification (UHF RFID) technology is the most advanced fourth-generation automatic identification technology in the world. High, fast recognition speed, strong anti-interference ability, long service life, can penetrate non-metallic materials, wide application range and so on. It is a brand-new management method launched to automatically collect characteristic data such as attributes, states, and numbers of objects for the realization of digitalization and informatization. It can be widely used in automatic identification of people, animals, objects, etc. Therefore, the development of UHF RFID system is the focus of current RFID system development. [0003] A typical UHF RFID system includes tags, readers and application systems. The tag is composed of ...
Claims
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IPC IPC(8): H01Q1/38G06K19/077H01Q13/10H01Q1/22
Inventor 虞坚阳张青青许箴金峰
Owner CHANGZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER