CN105048060A - Anti-interference antenna for radio frequency identification (RFID) tag reader - Google Patents

Anti-interference antenna for radio frequency identification (RFID) tag reader Download PDF

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Publication number
CN105048060A
CN105048060A CN 201510436348 CN201510436348A CN105048060A CN 105048060 A CN105048060 A CN 105048060A CN 201510436348 CN201510436348 CN 201510436348 CN 201510436348 A CN201510436348 A CN 201510436348A CN 105048060 A CN105048060 A CN 105048060A
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CN
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Prior art keywords
antenna
tag reader
tag
rfid
interference
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CN 201510436348
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Chinese (zh)
Inventor
田果成
韩德克
徐虎
邱运邦
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爱康普科技(大连)有限公司
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Abstract

The invention provides an anti-interference antenna for a radio frequency identification (RFID) tag reader. An outer ring of the antenna for the tag reader is provided with at least one closed coil ring which is articulated by a lead; and a resisting electromagnetic field is generated to prevent an external alternating electromagnetic field from changing, so that the anti-interference function of a tag reading head antenna is effectively realized.

Description

一种RF ID标签读取器的抗干扰天线 One kind of RF ID tag reader antenna interference

技术领域 FIELD

[0001] 本发明涉及RFID电子标签领域,尤其涉及RFID读取器的天线技术领域。 [0001] The present invention relates to RFID tags, and in particular relates to a technical field of the RFID reader antenna.

背景技术 Background technique

[0002] 双频RFID工作在两个频点上,低频用于读头向标签发射能量电磁波,高频用于标签向读头发射信息。 [0002] RFID dual work on two frequencies, a low frequency electromagnetic wave energy emitting head for reading the tag, the tag for transmitting high-frequency information to the reading head. 他们的频段分别是,低频几百KHz,高频几MHz。 Their bands are low frequency of several hundred KHz, high frequency a few MHz. 高频天线在接收标签发出的高频电磁波的同时,也能接收到来自空间的各种电磁波。 Simultaneously receiving radio-frequency antenna in the high frequency electromagnetic wave emitted by the label, you can receive the electromagnetic waves from the various spaces. 由于高频频段正处于广播电台的中波和短波频段,实验证明,当空间存在频率相近的广播电台的电磁波时,读头的高频接收电路将受到严重的干扰,使读头读取标签的距离大大缩短。 Since the frequency band is in the medium wave and short wave broadcasting radio bands, experiments show that, when there is a spatial frequency close Radio waves, high-frequency receiving circuit of the read head will be serious interference, the read head reads the tag greatly shorten the distance.

发明内容 SUMMARY

[0003] 为了克服标签读取器天线存在的上述干扰问题,本发明提供了一种RFID标签读取器的抗干扰天线。 [0003] In order to overcome the above problems of interference tag reader antenna, the present invention provides an RFID tag reader antenna interference.

[0004] 本发明为实现上述目的所采用的技术方案是:一种RFID标签的抗干扰天线,标签6读取器天线外圈设置至少一个由导线环接而成的闭合线圈环3。 [0004] Technical Solution To achieve the above object of the present invention is used are: interference antenna for RFID tag, the tag reader antenna outer ring 6 is provided at least one ring formed by a closed contact ring 3 by a wire coil.

[0005] 所述标签6为双频RFID标签,标签读取器天线为环形低频天线2和环形高频天线 [0005] The RFID tag 6 is a dual-frequency tag, tag reader antenna is a loop antenna 2 and loop low frequency antenna

1 1

[0006] 所述标签6为有源标签,标签读取器天线为高频天线I。 [0006] The tab 6 is an active tag, the tag reader antenna to the high frequency antenna I.

[0007] 所述闭合线圈环3内设置至少一套标签天线。 [0007] The ring closing coil 3 within at least one set of the tag antenna.

[0008] 本发明的RFID标签读取器的抗干扰天线,在天线的外圈加一个闭合线圈环,产生一个抵抗电磁场阻止外部交变电磁场的变化,有效实现了标签读头天线的抗干扰功能。 [0008] RFID tag reader antenna interference present invention, the outer ring of the antenna coil plus a closed loop, generates a resistance change in an alternating electromagnetic field to prevent external electromagnetic field, the effective realization of the tag antenna interference function readhead .

附图说明 BRIEF DESCRIPTION

[0009] 图1是双频RFID读头的天线原理图。 [0009] FIG. 1 is a dual head RFID reader antenna diagram.

[0010] 图2是本发明加入闭合线圈环的双频RFID读取器的天线原理图。 [0010] FIG. 2 is a schematic diagram of the present invention is added to the antenna coil dual closed loop of the RFID reader.

[0011] 图3是本发明加入闭合线圈环的双频RFID读取器天线磁场原理图。 [0011] FIG. 3 is added to the present invention is a dual RFID reader antenna field diagram of a closed loop coil.

[0012] 图4是本发明RFID标签和闭合线圈环的工作原理图。 [0012] FIG. 4 is a working principle diagram of the RFID tag and a closed loop coil of the present invention.

[0013] 图5是本发明加入闭合线圈环的有源标签天线原理图。 [0013] FIG. 5 is a tag antenna of the present invention is added to the active principle a closed coil loop of FIG.

[0014] 图6是本发明RFID标签读取器多套天线外部设有闭合线圈原理图。 [0014] FIG. 6 is an external antenna sets of the present invention, the RFID tag reader is provided with closing coil schematic.

[0015] 图中:1、高频天线,2、低频天线,3、闭合线圈环,4、外部电磁场,5、抵抗电磁场,6、标签,7、闭合磁力线。 [0015] FIG: 1, a high-frequency antenna 2, a low frequency antenna 3, a closed loop coil, 4, an external electromagnetic field, 5 against electromagnetic fields, 6, labels, 7, closed magnetic field lines.

具体实施方式 Detailed ways

[0016] 双频RFID标签读头的天线一般包含两个环形天线:一个低频天线2,一个高频天线1,其布局如图1所示,天线的布局也可以是低频天线在里圈,高频天线在外圈。 [0016] The dual-frequency antenna of the RFID tag read head generally comprises two loop antennas: a low-frequency antenna 2, a radio-frequency antenna 1, the layout shown in Figure 1, the antenna arrangement may be in the circle in the low frequency antenna, high the outer ring band antenna. 当RFID双频标签接近天线电磁波的覆盖范围内时,读头就能读取到标签发出的信息。 When an RFID tag close to the dual-frequency antenna coverage of an electromagnetic wave, can be read by the read head to the information from the tags. 高频天线在接收标签发出的高频电磁波的同时,也能接收到来自空间的各种电磁波。 Simultaneously receiving radio-frequency antenna in the high frequency electromagnetic wave emitted by the label, you can receive the electromagnetic waves from the various spaces. 实验证明,当空间存在频率相近的广播电台的电磁波时,读头的高频接收电路将受到严重的干扰。 Experiments show that, when there is a spatial frequency close Radio waves, high-frequency receiving circuit of the read head will be seriously disturbed.

[0017] 本发明提出了一种屏蔽外部干扰的天线设计方法,即在天线的外圈加一个闭合线圈环3,如图2所示,这个闭合线圈环3是由导线环接而成,位于原天线的外圈。 [0017] The present invention provides a method of designing antenna shielded from external interference, i.e., plus a closed loop coil antenna outer ring 3, as shown, the closed loop coil 3 is connected by a wire to form a ring 2, is located the outer ring of the original antenna.

[0018] 法拉第定律表明,当外部交变电磁场4穿过一个闭合线圈环3时,闭合线圈环3中将产生交变电流。 [0018] Faraday's Law states that when an external alternating field coil 4 through a closure ring 3, closure ring 3 in the coil generates an alternating current. 而线圈中的这个电流又将产生一个抵抗电磁场5去阻止外部交变电磁场4的变化,这个阻止作用就是对外部电磁波的屏蔽,如图3所示。 This current in the coil in turn generates an electromagnetic field 5 to stop against the external alternating electromagnetic field variation 4, the effect is to prevent external electromagnetic shielding, as shown in FIG.

[0019] 由于标签尺寸小,又位于闭合线圈环3的空间内,标签6所发出的电磁场产生的闭合磁力线7是闭合的,这样的闭合电磁波不会在闭合线圈3中产生电流,因此不会被屏蔽,如图4所示。 [0019] Due to the small size of the label, and in the closed space of the coil inner ring 3, a closed magnetic field lines emitted electromagnetic field generated by the tag 7 6 is closed, so that in closing the electromagnetic closing coil 3 does not generate a current, it will not It is masked, as shown in FIG. 4.

[0020] 对于有源标签,标签带电池,主动发射电磁波信号,因此读头天线没有低频发射天线,采用同样的方法所构成的天线图5所示。 [0020] For an active tag, the tag with battery, the active transmit electromagnetic wave signals, so that the read head is not low frequency antenna transmitting antenna, using the same method as the antenna pattern configuration shown in FIG. 5.

[0021] 闭合线圈环3内还可以有多套天线,如图6所示。 [0021] The closed loop coils may be multiple sets of antenna 3, as shown in FIG.

[0022] 本发明是通过实施例进行描述的,本领域技术人员知悉,在不脱离本发明的精神和范围的情况下,可以对这些特征和实施例进行各种改变或等效替换。 [0022] The present invention has been described by way of example, known to the person skilled in the art, without departing from the spirit and scope of the present invention, various changes may be made to these embodiments or features and equivalents. 另外,在本发明的教导下,可以对这些特征和实施例进行修改以适应具体的情况及材料而不会脱离本发明的精神和范围。 Further, the teachings of the present invention, modifications may be made to these embodiments and features to adapt a particular situation or material without departing from the spirit and scope of the invention. 因此,本发明不受此处所公开的具体实施例的限制,所有落入本申请的权利要求范围内的实施例都属于本发明的保护范围。 Accordingly, the present invention is not limited to the specific embodiments disclosed herein, embodiments within the scope of the present invention fall within the protection scope of all to fall within the present application.

Claims (4)

  1. 1.一种RFID标签读取器的抗干扰天线,其特征在于:标签(6)读取器天线外圈设置至少一个由导线环接而成的闭合线圈环(3 )。 1. An RFID tag reader antenna interference, wherein: the tag (6) to read at least one antenna connected to the outer ring formed by ring closing coil (3) by a wire loop.
  2. 2.根据权利要求1所述的一种RFID标签读取器的抗干扰天线,其特征在于:所述标签(6)为双频RFID标签,标签读取器天线为环形低频天线(2)和环形高频天线(I)。 The interference antenna for RFID tag reader according to claim 1, characterized in that: said tag (6) is a dual-band RFID tag, tag reader low frequency antenna is a loop antenna (2), and frequency antenna loop (I).
  3. 3.根据权利要求1所述的一种RFID标签读取器的抗干扰天线,其特征在于:所述标签(6)为有源标签,标签读取器天线为高频天线(I )。 3. An RFID tag reader antenna interference according to claim 1, characterized in that: said tag (6) is an active tag, the tag reader antenna to the high frequency antenna (I).
  4. 4.根据权利要求1所述的一种RFID标签读取器的抗干扰天线,其特征在于:所述闭合线圈环(3)内设置至少一套标签读取器天线。 4. An RFID tag reader antenna interference according to claim 1, wherein: said closed loop coil disposed at least a tag reader antenna (3).
CN 201510436348 2015-07-23 2015-07-23 Anti-interference antenna for radio frequency identification (RFID) tag reader CN105048060A (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1425169A (en) * 2000-04-18 2003-06-18 纳格雷德股份有限公司 Electronic tags
WO2003096478A1 (en) * 2002-04-25 2003-11-20 Cet Technologies Pte Ltd An antenna
CN1489806A (en) * 2000-12-18 2004-04-14 三菱麻铁里亚尔株式会社 Antenna for RFID
CN1662927A (en) * 2002-06-17 2005-08-31 日立麦克赛尔株式会社 Non-contact communication system information carrier
US20050212707A1 (en) * 2004-03-23 2005-09-29 Egbert William C Radio frequency identification tags with compensating elements
US6956481B1 (en) * 1998-07-20 2005-10-18 Germplus Metal screened electronic labelling system
CN101896922A (en) * 2007-10-19 2010-11-24 佩特拉特克国际有限公司 Rfid tag especially for use near conductive objects
CN102119395A (en) * 2008-06-11 2011-07-06 艾利丹尼森公司 RFID device with conductive loop shield
CN204834839U (en) * 2015-07-23 2015-12-02 爱康普科技(大连)有限公司 RFID label reader's anti -interference antenna

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6956481B1 (en) * 1998-07-20 2005-10-18 Germplus Metal screened electronic labelling system
CN1425169A (en) * 2000-04-18 2003-06-18 纳格雷德股份有限公司 Electronic tags
CN1489806A (en) * 2000-12-18 2004-04-14 三菱麻铁里亚尔株式会社 Antenna for RFID
WO2003096478A1 (en) * 2002-04-25 2003-11-20 Cet Technologies Pte Ltd An antenna
CN1662927A (en) * 2002-06-17 2005-08-31 日立麦克赛尔株式会社 Non-contact communication system information carrier
US20050212707A1 (en) * 2004-03-23 2005-09-29 Egbert William C Radio frequency identification tags with compensating elements
CN101896922A (en) * 2007-10-19 2010-11-24 佩特拉特克国际有限公司 Rfid tag especially for use near conductive objects
CN102119395A (en) * 2008-06-11 2011-07-06 艾利丹尼森公司 RFID device with conductive loop shield
CN204834839U (en) * 2015-07-23 2015-12-02 爱康普科技(大连)有限公司 RFID label reader's anti -interference antenna

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