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Dual-mode antenna for radio frequency identification and radio frequency identification device

A wireless radio frequency, dual-mode antenna technology, applied to antenna support/installation devices, devices that enable antennas to work in different bands at the same time, antennas, etc., can solve problems such as uneven signals, wrong and missing radio frequency receipts, etc. To achieve the effect of ensuring uniformity, ensuring safety, and comprehensive sensing range

Inactive Publication Date: 2012-01-25
NATIONZ TECH INC
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AI Technical Summary

Problems solved by technology

[0012] The invention provides a dual-mode antenna for wireless radio frequency identification, which is applied to the RFID dual-mode antenna of HF and UHF ticket checking systems, realizes high isolation of two different frequency band antennas, is compatible and does not affect each other, and improves the induction of radio frequency antennas The uniformity of the signal within the range solves the problem of wrong and missed printing of RF bills due to the unevenness of the signal within the sensing range of the RF antenna

Method used

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  • Dual-mode antenna for radio frequency identification and radio frequency identification device
  • Dual-mode antenna for radio frequency identification and radio frequency identification device
  • Dual-mode antenna for radio frequency identification and radio frequency identification device

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Embodiment Construction

[0028] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples cited are only used to explain the present invention and not used to limit the scope of the present invention.

[0029] Such as figure 1 As shown, a dual-mode radio frequency antenna includes a closed loop radio frequency antenna 11 and a ceramic radio frequency antenna array 12 arranged on the same PCB board. The radio frequency antenna 11 is an inductively coupled closed loop antenna and works in the high frequency HF band. The radio frequency antenna array 12 is a backscatter coupled antenna array, which works in the UHF frequency band.

[0030] The ceramic antenna array 12 includes four 915MHz ceramic antenna subunits (13, 14, 15, 16) arranged in the center of the closed-loop radio frequency antenna 11, evenly distributed on a 360° circle, each antenna subunit is responsible for its surroundings Each antenna sub-unit is connected to the c...

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Abstract

The invention relates to a radio frequency identification (RFID) dual-mode antenna for a high-frequency (HF) and ultrahigh-frequency (UHF) ticket checking system, which is mainly used for realizing the high-isolation design, perfect compatibility and no mutual impact of two types of different-frequency-band antennas. The radio frequency antenna comprises an HF closed-loop antenna and an UHF ceramic antenna array. The ceramic antenna array is controlled to switch by a micro control unit (MCU) through radio frequency switches, so as to enable antenna branches to be conducted by turns. On the premise that the magnetic induction lines of the HF antenna is not affected, the goal that the two types of different-frequency-band antennas work at the same time is realized. The RFID dual-mode antenna has the advantages that the problem in the electromagnetic compatibility of a UH radio frequency antenna can be solved, the evenness of ticket reading is guaranteed, the situation of misreading is precluded and the safety of ticket check is ensured.

Description

Technical field [0001] The invention relates to the technical field of radio frequency identification applications, in particular to a dual-mode antenna and a radio frequency identification device used in the field of radio frequency bill swiping. Background technique [0002] Radio Frequency Identification (RFID) is a non-contact automatic identification technology. In the RFID system, identification information is stored in an electronic data carrier, and the electronic data carrier becomes a transponder. The identification information stored in the transponder is read by the reader. In some applications, the reader can not only read the stored information, but also write data to the transponder. Reading and writing are achieved through wireless communication between the two parties. of. [0003] RFID is divided into low frequency (LF), high frequency (HF), ultra high frequency (UHF), microwave (MW) according to different application frequencies. The corresponding representativ...

Claims

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Application Information

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IPC IPC(8): H01Q1/12H01Q5/00H01Q7/00H01Q21/00G06K7/00H01Q5/40
Inventor 申秀美章伟许晖苏成月
Owner NATIONZ TECH INC
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