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Circularly-polarized electronic tag

An electronic tag and circular polarization technology, applied in the field of radio frequency identification, can solve problems such as low correlation, affecting sensitivity, limiting application scenarios, etc., and achieve the effect of high bandwidth and good data communication

Inactive Publication Date: 2018-12-28
华大恒芯科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

In practical applications, the electronic tag has a large polarization loss, which seriously affects its sensitivity, limits its application scenarios, and reduces user experience
[0004] On the contrary, the sensitivity of circularly polarized antennas has a lower correlation with the direction of signal reception, but circularly polarized antennas are rarely used in RFID tags in practical applications.
Furthermore, in limited circularly polarized transponder applications, the correlation between the sensitivity and the direction of application and / or placement is still not low enough to be satisfactory

Method used

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Embodiment Construction

[0025] It should be noted that components in the various figures may be shown exaggerated for the purpose of illustration and are not necessarily true to scale. In the various figures, identical or functionally identical components are assigned the same reference symbols.

[0026] In the present invention, unless otherwise specified, "arranged on", "arranged on" and "arranged on" do not exclude the presence of intermediates between the two.

[0027] In the present invention, each embodiment is only intended to illustrate the solutions of the present invention, and should not be construed as limiting.

[0028] In the present invention, unless otherwise specified, the quantifiers "a" and "an" do not exclude the scene of multiple elements.

[0029] It should also be pointed out here that in the embodiments of the present invention, for the sake of clarity and simplicity, only a part of parts or components may be shown, but those skilled in the art can understand that under the t...

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Abstract

The invention relates to a circularly polarized electronic tag, comprising a substrate for receiving a chip and an antenna; a chip matched to the antenna; and an antenna having a short-circuit ring onwhich the chip is disposed; and an antenna vibrator coupled to the short circuit ring and having four arms, wherein the arms are arranged at intervals of 90 DEG respectively and the arms are sized such that the phases of the arms are 90 DEG different from each other. Through the electronic tag, the correlation degree between the sensitivity and the pasting direction and / or the placement directioncan be greatly reduced, so that the application situation and the application prospect of the RFID tag can be greatly expanded; in addition, the circularly polarized electronic tag has high bandwidthand can flexibly set impedance, geometry, operating frequency and other parameters.

Description

technical field [0001] The present invention generally relates to the field of radio frequency identification (RFID), in particular to a circularly polarized electronic tag. Background technique [0002] With the rise of the Internet of Things, as one of the key technologies, RFID (Radio Frequency Identification) technology has been widely used in daily life, such as in logistics, anti-counterfeiting, transportation, warehousing and other fields. One of the key parameters of RFID technology is the sensitivity of RFID electronic tags, which directly determines the application occasions and application prospects of RFID technology in Internet of Things technology. [0003] At present, RFID electronic tags mainly use linearly polarized antennas. Since the sensitivity of the linearly polarized antenna is highly correlated with the signal receiving direction, the sticking direction of the RFID electronic tag using the linearly polarized antenna must match the signal receiving di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/077
CPCG06K19/0772G06K19/07745G06K19/0775
Inventor 马纪丰
Owner 华大恒芯科技有限公司
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