CN111079457A - 一种rfid读写器的桥接电调谐天线 - Google Patents

一种rfid读写器的桥接电调谐天线 Download PDF

Info

Publication number
CN111079457A
CN111079457A CN201911243155.7A CN201911243155A CN111079457A CN 111079457 A CN111079457 A CN 111079457A CN 201911243155 A CN201911243155 A CN 201911243155A CN 111079457 A CN111079457 A CN 111079457A
Authority
CN
China
Prior art keywords
antenna
output end
diode
rfid reader
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201911243155.7A
Other languages
English (en)
Other versions
CN111079457B (zh
Inventor
任晓波
孙虎
谢政
赵朝源
曾鸣
李水苗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huazhong University of Science and Technology
Original Assignee
Huazhong University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huazhong University of Science and Technology filed Critical Huazhong University of Science and Technology
Priority to CN201911243155.7A priority Critical patent/CN111079457B/zh
Publication of CN111079457A publication Critical patent/CN111079457A/zh
Application granted granted Critical
Publication of CN111079457B publication Critical patent/CN111079457B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
    • G06K17/0029Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0701Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
    • G06K19/0707Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation
    • G06K19/0708Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation the source being electromagnetic or magnetic
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0701Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
    • G06K19/0715Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement including means to regulate power transfer to the integrated circuit
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07773Antenna details
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Engineering & Computer Science (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

本发明涉及电子通信技术领域,具体涉及一种RFID读写器的桥接电调谐天线,包括天线壳体以及耦合天线;所述天线壳体内设有辐射天线以及功分器;所述功分器的一个输出端与辐射天线连接;所述天线壳体内设有无线能量收集单元、控制单元以及调谐单元;所述功分器的另一个输出端与无线能量收集单元的输入端连接;所述无线能量收集单元的输出端用于给控制单元供电;控制单元用于产生三角波信号给调谐单元;所述调谐单元与辐射天线连接。本发明能够根据天线性能的恶化程度,自动调谐匹配电路,优化天线性能,增加整个RFID读写器读写距离;本发明通过收集电磁波信号转化给桥接电调谐天线供电,不需要额外外部供电。

Description

一种RFID读写器的桥接电调谐天线
技术领域
本发明涉及电子通信技术领域,具体涉及一种RFID读写器的桥接电调谐天线。
背景技术
UHF RFID读写器天线属于面积型微带型天线,天线带宽为1%,主流增益为2-8dBi,FCC频率范围902~928MHz,驻波<1.4.受限于接地板的尺寸和面积,天线一旦出厂,这些指标将无法更改。
RFID读写器天线作为一个电磁波辐射单元,对金属环境敏感,要求辐射场净空。但是在工业环境中,结构件全部为金属,天线安装空间和位置受限,使得各项指标恶化严重。
发明内容
本发明的目的是针对现有技术中的上述不足,提供了一种RFID读写器的桥接电调谐天线。
本发明的目的通过以下技术方案实现:一种RFID读写器的桥接电调谐天线,包括天线壳体以及耦合天线;所述天线壳体内设有辐射天线以及功分器;所述耦合天线与功分器的输入端连接;所述功分器的一个输出端与辐射天线连接;所述耦合天线用于与RFID读写器天线耦合;
所述天线壳体内设有无线能量收集单元、控制单元以及调谐单元;所述功分器的另一个输出端与无线能量收集单元的输入端连接;所述无线能量收集单元的输出端用于给控制单元供电;控制单元用于产生三角波信号给调谐单元;所述调谐单元与辐射天线连接。
本发明进一步设置为,所述RFID读写器的桥接电调谐天线还包括传输馈线;所述耦合天线通过传输馈线与功分器的输入端连接。
本发明进一步设置为,所述无线能量收集单元包括低通滤波模块、桥式整流模块以及稳压模块;所述功分器的另一个输出端与低通滤波模块的输入端连接;所述低通滤波模块的输出端与桥式整流模块的输入端连接;所述桥式整流模块的输出端与稳压模块的输入端连接;所述稳压模块的输出端与控制单元连接。
本发明进一步设置为,所述低通滤波模块包括电容C2以及电感L2;所述桥式整流模块包括二极管D2、二极管D3、二极管D4以及二极管D5;所述稳压模块包括开关稳压芯片U1;所述功分器的另一个输出端与电感L2的一端连接;所述电感L2的另一端通过电容C2接地;所述电感L2的另一端分别与二极管D2的正极、二极管D3的负极、二极管D4的正极以及二极管D5的负极连接;所述二极管D3的正极以及二极管D5的正极接地;所述二极管D2的负极以及二极管D4的与开关稳压芯片U1输入端连接;所述开关稳压芯片U1的输出端与控制单元连接。
本发明进一步设置为,所述无线能量收集单元还包括超级电容C4;所述超级电容C4与桥式整流模块的输出端连接。
本发明进一步设置为,所述控制单元包括施密特触发模块以及低通滤波模块;所述低通滤波模块的电源端与无线能量收集单元的输出端连接;所述低通滤波模块的输入端与施密特触发模块输出端连接;所述低通滤波模块的输出端与调谐单元连接。
本发明进一步设置为,所述施密特触发模块包括施密特触发器U2A、施密特触发器U2B、电阻R4、电阻R5以及电容C7;所述低通滤波模块包括运算放大器U3A、电阻R3以及电容C5;
所述施密特触发器U2A的输入端通过电容C7接地;所述施密特触发器U2A的输入端依次通过电阻R4以及电阻R5后与施密特触发器U2A的输出端连接;所述施密特触发器U2A的输出端与施密特触发器U2B的输入端连接;所述施密特触发器U2B的输出端与运算放大器U3A的负输入端连接;所述运算放大器U3A的负输入端通过电阻R3与运算放大器U3A的输出端连接;所述电容C5与电阻R3并联;所述运算放大器U3A的输出端与调谐单元连接;
所述控制单元还包括电感L3、电容C4以及可调电阻VR1;所述无线能量收集单元的输出端与电感L3的一端连接;所述电感L3另一端通过电容C6接地;所述电感L3另一端与可调电阻VR1的一端连接;所述可调电阻VR1的另一端与运算放大器U3A的电源端连接;所述可调电阻VR1的调节端与运算放大器U3A的正输入端连接。
本发明进一步设置为,所述调谐单元包括变容二极管D1;所述变容二极管D1的正极接地;所述变容二极管D1的负极与功分器的一个输出端连接;所述变容二极管D1的负极与控制单元的输出端连接。
本发明的有益效果:1.本发明采用耦合天线与RFID读写器天线耦合,不需要物理连接;本发明的天线壳体与RFID读写器天线分离设置,故天线壳体的尺寸灵活,可以安装到尺寸受限的环境中;3.桥接电调谐天线能够根据天线性能的恶化程度,自动调谐匹配电路,优化天线性能,增加整个RFID读写器读写距离;4.可以使用在任何UHF RFID读写器上,不受限厂家和读写器类型;5.本发明通过收集电磁波信号转化给桥接电调谐天线供电,不需要额外外部供电,并且全部是逻辑器件,功耗极低。
附图说明
利用附图对发明作进一步说明,但附图中的实施例不构成对本发明的任何限制,对于本领域的普通技术人员,在不付出创造性劳动的前提下,还可以根据以下附图获得其它的附图。
图1是本发明与RFID读写器天线配合的结构示意图;
图2是本发明的原理图;
图3是本发明功分器、无线能量收集单元以及调谐单元配合的电路图;
图4是本发明控制单元的电路图;
其中:1-天线壳体;2-耦合天线;3-功分器;4-无线能量收集单元;5-调谐单元;6-RFID读写器天线。
具体实施方式
结合以下实施例对本发明作进一步描述。
由图1至图4可知;本实施例所述的一种RFID读写器的桥接电调谐天线,包括天线壳体1以及耦合天线2;所述天线壳体1内设有辐射天线以及功分器3;所述耦合天线2与功分器3的输入端连接;所述功分器3的一个输出端与辐射天线连接;所述耦合天线2用于与RFID读写器天线6耦合;其中,图中并未画出辐射天线;
所述天线壳体1内设有无线能量收集单元4、控制单元以及调谐单元5;所述功分器3的另一个输出端与无线能量收集单元4的输入端连接;所述无线能量收集单元4的输出端用于给控制单元供电;控制单元用于产生三角波信号给调谐单元5;所述调谐单元5与辐射天线连接。
具体地,本实施例所述的种RFID读写器的桥接电调谐天线,在使用的时候首先将耦合天线2与RFID读写器天线6正对放置,耦合天线2与RFID读写器天线6进行无线能量传输耦合;信号从RFID读写器天线6辐射到耦合天线2,损耗约为-2.8dB至-3.0dB。耦合天线2将信号传输至天线壳体1的输入口即附图中的P2端口,P2端口功率经过功分器3分配,其中50%信号传输到辐射天线的馈电口即图中的P1端口,另外50%信号送到无线能量收集单元4,无线信号转换成3V直流电源,给控制单元供电,控制单元从而能够产生1.2MHz频率的三角波信号,将该1.2MHz频率的三角波信号加到P1端口的调谐单元5上,从而产生变化的电容给辐射天线,从而达到自动调谐天线阻抗和频率的效果。
本实施例采用耦合天线2与RFID读写器天线6耦合,不需要物理连接;本实施例的天线壳体1与RFID读写器天线6分离设置,故天线壳体1的尺寸灵活,可以安装到尺寸受限的环境中;3.本实施例的桥接电调谐天线能够根据天线性能的恶化程度,自动调谐匹配电路,优化天线性能,即相当于在传统的RFID读写器天线6增加本实施例的桥接电调谐天线,对RFID读写器天线6进行拓展,从而增加整个RFID读写器天线6的读写距离;本实施例可以使用在任何UHF RFID读写器上,不受限厂家和读写器类型;本实施例通过收集电磁波信号转化给桥接电调谐天线供电,不需要额外外部供电,并且全部是逻辑器件,功耗极低。
本实施例所述的一种RFID读写器的桥接电调谐天线,所述RFID读写器的桥接电调谐天线还包括传输馈线;所述耦合天线2通过传输馈线与功分器3的输入端连接。上述设置能够使得耦合天线2与天线壳体1分离设置,便于耦合天线2与RFID读写器天线6进行耦合。
本实施例所述的一种RFID读写器的桥接电调谐天线,所述无线能量收集单元4包括低通滤波模块、桥式整流模块以及稳压模块;所述功分器3的另一个输出端与低通滤波模块的输入端连接;所述低通滤波模块的输出端与桥式整流模块的输入端连接;所述桥式整流模块的输出端与稳压模块的输入端连接;所述稳压模块的输出端与控制单元连接。本实施例所述的一种RFID读写器的桥接电调谐天线,所述低通滤波模块包括电容C2以及电感L2;所述桥式整流模块包括二极管D2、二极管D3、二极管D4以及二极管D5;所述稳压模块包括开关稳压芯片U1;所述功分器3的另一个输出端与电感L2的一端连接;所述电感L2的另一端通过电容C2接地;所述电感L2的另一端分别与二极管D2的正极、二极管D3的负极、二极管D4的正极以及二极管D5的负极连接;所述二极管D3的正极以及二极管D5的正极接地;所述二极管D2的负极以及二极管D4的与开关稳压芯片U1输入端连接;所述开关稳压芯片U1的输出端与控制单元连接。
具体地,信号从功分器3的另一个输出口输出之后,经过电感L2以及电容C2组成的低通滤波模块后,信号被送给由二极管D2、二极管D3、二极管D4以及二极管D5组成的桥式整流模块,从而转换为电压不稳定的直流电压,再此电压进入开关稳压芯片U1,不稳定的直流电压被稳压到3.3V直流电压VCC,从而给控制单元进行供电。
本实施例所述的一种RFID读写器的桥接电调谐天线,所述无线能量收集单元4还包括超级电容C4;所述超级电容C4与桥式整流模块的输出端连接。通过设置超级电容C4,能够对桥式整流模块输出的电压进行储能,从而能够提高桥接电调谐天线的效率。
本实施例所述的一种RFID读写器的桥接电调谐天线,所述控制单元包括施密特触发模块以及低通滤波模块;所述低通滤波模块的电源端与无线能量收集单元4的输出端连接;所述低通滤波模块的输入端与施密特触发模块输出端连接;所述低通滤波模块的输出端与调谐单元5连接。
本实施例所述的一种RFID读写器的桥接电调谐天线,所述施密特触发模块包括施密特触发器U2A、施密特触发器U2B、电阻R4、电阻R5以及电容C7;所述低通滤波模块包括运算放大器U3A、电阻R3以及电容C5;
所述施密特触发器U2A的输入端通过电容C7接地;所述施密特触发器U2A的输入端依次通过电阻R4以及电阻R5后与施密特触发器U2A的输出端连接;所述施密特触发器U2A的输出端与施密特触发器U2B的输入端连接;所述施密特触发器U2B的输出端与运算放大器U3A的负输入端连接;所述运算放大器U3A的负输入端通过电阻R3与运算放大器U3A的输出端连接;所述电容C5与电阻R3并联;所述运算放大器U3A的输出端与调谐单元5连接;
所述控制单元还包括电感L3、电容C4以及可调电阻VR1;所述无线能量收集单元4的输出端与电感L3的一端连接;所述电感L3另一端通过电容C6接地;所述电感L3另一端与可调电阻VR1的一端连接;所述可调电阻VR1的另一端与运算放大器U3A的电源端连接;所述可调电阻VR1的调节端与运算放大器U3A的正输入端连接。
具体地,施密特触发器U2A、施密特触发器U2B、电阻R4、电阻R5以及电容C7组成的施密特触发模块输出1.2Mhz的方波信号,该1.2Mhz的方波信号经过由运算放大器U3A、电阻R3以及电容C5组成的低通滤波模块,从而输出0-3V的1.2MHz三角波信号给调谐单元5从而进行电容的调节。
本实施例所述的一种RFID读写器的桥接电调谐天线,所述调谐单元5包括变容二极管D1;所述变容二极管D1的正极接地;所述变容二极管D1的负极与功分器3的一个输出端连接;所述变容二极管D1的负极与控制单元的输出端连接。
具体地,控制单元输出的0-3V的1.2MHz三角波信号加到变容二极管D1负极,0V-3V时变容二极管D1的电容在0.1pF-9.8pF之间改变,从而使辐射天线的阻抗和频率产生改变,从而使天线适应多金属电磁环境,达到自适应作用。
最后应当说明的是,以上实施例仅用以说明本发明的技术方案,而非对本发明保护范围的限制,尽管参照较佳实施例对本发明作了详细地说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的实质和范围。

Claims (8)

1.一种RFID读写器的桥接电调谐天线,其特征在于:包括天线壳体(1)以及耦合天线(2);所述天线壳体(1)内设有辐射天线以及功分器(3);所述耦合天线(2)与功分器(3)的输入端连接;所述功分器(3)的一个输出端与辐射天线连接;所述耦合天线(2)用于与RFID读写器天线(6)耦合;
所述天线壳体(1)内设有无线能量收集单元(4)、控制单元以及调谐单元(5);所述功分器(3)的另一个输出端与无线能量收集单元(4)的输入端连接;所述无线能量收集单元(4)的输出端用于给控制单元供电;控制单元用于产生三角波信号给调谐单元(5);所述调谐单元(5)与辐射天线连接。
2.根据权利要求1所述的一种RFID读写器的桥接电调谐天线,其特征在于:所述RFID读写器的桥接电调谐天线还包括传输馈线;所述耦合天线(2)通过传输馈线与功分器(3)的输入端连接。
3.根据权利要求1所述的一种RFID读写器的桥接电调谐天线,其特征在于:所述无线能量收集单元(4)包括低通滤波模块、桥式整流模块以及稳压模块;所述功分器(3)的另一个输出端与低通滤波模块的输入端连接;所述低通滤波模块的输出端与桥式整流模块的输入端连接;所述桥式整流模块的输出端与稳压模块的输入端连接;所述稳压模块的输出端与控制单元连接。
4.根据权利要求3所述的一种RFID读写器的桥接电调谐天线,其特征在于:所述低通滤波模块包括电容C2以及电感L2;所述桥式整流模块包括二极管D2、二极管D3、二极管D4以及二极管D5;所述稳压模块包括开关稳压芯片U1;所述功分器(3)的另一个输出端与电感L2的一端连接;所述电感L2的另一端通过电容C2接地;所述电感L2的另一端分别与二极管D2的正极、二极管D3的负极、二极管D4的正极以及二极管D5的负极连接;所述二极管D3的正极以及二极管D5的正极接地;所述二极管D2的负极以及二极管D4的与开关稳压芯片U1输入端连接;所述开关稳压芯片U1的输出端与控制单元连接。
5.根据权利要求3所述的一种RFID读写器的桥接电调谐天线,其特征在于:所述无线能量收集单元(4)还包括超级电容C4;所述超级电容C4与桥式整流模块的输出端连接。
6.根据权利要求1所述的一种RFID读写器的桥接电调谐天线,其特征在于:所述控制单元包括施密特触发模块以及低通滤波模块;所述低通滤波模块的电源端与无线能量收集单元(4)的输出端连接;所述低通滤波模块的输入端与施密特触发模块输出端连接;所述低通滤波模块的输出端与调谐单元(5)连接。
7.根据权利要求6所述的一种RFID读写器的桥接电调谐天线,其特征在于:所述施密特触发模块包括施密特触发器U2A、施密特触发器U2B、电阻R4、电阻R5以及电容C7;所述低通滤波模块包括运算放大器U3A、电阻R3以及电容C5;
所述施密特触发器U2A的输入端通过电容C7接地;所述施密特触发器U2A的输入端依次通过电阻R4以及电阻R5后与施密特触发器U2A的输出端连接;所述施密特触发器U2A的输出端与施密特触发器U2B的输入端连接;所述施密特触发器U2B的输出端与运算放大器U3A的负输入端连接;所述运算放大器U3A的负输入端通过电阻R3与运算放大器U3A的输出端连接;所述电容C5与电阻R3并联;所述运算放大器U3A的输出端与调谐单元(5)连接;
所述控制单元还包括电感L3、电容C4以及可调电阻VR1;所述无线能量收集单元(4)的输出端与电感L3的一端连接;所述电感L3另一端通过电容C6接地;所述电感L3另一端与可调电阻VR1的一端连接;所述可调电阻VR1的另一端与运算放大器U3A的电源端连接;所述可调电阻VR1的调节端与运算放大器U3A的正输入端连接。
8.根据权利要求1所述的一种RFID读写器的桥接电调谐天线,其特征在于:所述调谐单元(5)包括变容二极管D1;所述变容二极管D1的正极接地;所述变容二极管D1的负极与功分器(3)的一个输出端连接;所述变容二极管D1的负极与控制单元的输出端连接。
CN201911243155.7A 2019-12-06 2019-12-06 一种rfid读写器的桥接电调谐天线 Active CN111079457B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911243155.7A CN111079457B (zh) 2019-12-06 2019-12-06 一种rfid读写器的桥接电调谐天线

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911243155.7A CN111079457B (zh) 2019-12-06 2019-12-06 一种rfid读写器的桥接电调谐天线

Publications (2)

Publication Number Publication Date
CN111079457A true CN111079457A (zh) 2020-04-28
CN111079457B CN111079457B (zh) 2023-09-29

Family

ID=70313136

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911243155.7A Active CN111079457B (zh) 2019-12-06 2019-12-06 一种rfid读写器的桥接电调谐天线

Country Status (1)

Country Link
CN (1) CN111079457B (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113283259A (zh) * 2021-07-19 2021-08-20 江西博星数码科技有限公司 一种基于rfid的多标签射频识别系统及方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5266926A (en) * 1991-05-31 1993-11-30 Avid Marketing, Inc. Signal transmission and tag power consumption measurement circuit for an inductive reader
US20070146138A1 (en) * 2005-12-22 2007-06-28 Xerox Corporation Interface antenna
US20070222604A1 (en) * 2006-03-23 2007-09-27 Xerox Corporation RFID bridge antenna
US20100141471A1 (en) * 2007-09-27 2010-06-10 Brother Kogyo Kabushiki Kaisha Handheld apparatus for reading rfid tag information
US20100148926A1 (en) * 2008-12-12 2010-06-17 Hee Bok Kang Dual antenna rfid tag
KR20110012662A (ko) * 2009-07-31 2011-02-09 주식회사 하이닉스반도체 듀얼 안테나를 포함하는 rfid 태그
CN102576930A (zh) * 2009-11-04 2012-07-11 株式会社村田制作所 通信终端及信息处理系统
CN102640164A (zh) * 2009-12-01 2012-08-15 施耐德电器工业公司 自我参数化的射频识别天线扩展器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5266926A (en) * 1991-05-31 1993-11-30 Avid Marketing, Inc. Signal transmission and tag power consumption measurement circuit for an inductive reader
US20070146138A1 (en) * 2005-12-22 2007-06-28 Xerox Corporation Interface antenna
US20070222604A1 (en) * 2006-03-23 2007-09-27 Xerox Corporation RFID bridge antenna
US20100141471A1 (en) * 2007-09-27 2010-06-10 Brother Kogyo Kabushiki Kaisha Handheld apparatus for reading rfid tag information
US20100148926A1 (en) * 2008-12-12 2010-06-17 Hee Bok Kang Dual antenna rfid tag
KR20110012662A (ko) * 2009-07-31 2011-02-09 주식회사 하이닉스반도체 듀얼 안테나를 포함하는 rfid 태그
CN102576930A (zh) * 2009-11-04 2012-07-11 株式会社村田制作所 通信终端及信息处理系统
CN102640164A (zh) * 2009-12-01 2012-08-15 施耐德电器工业公司 自我参数化的射频识别天线扩展器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113283259A (zh) * 2021-07-19 2021-08-20 江西博星数码科技有限公司 一种基于rfid的多标签射频识别系统及方法

Also Published As

Publication number Publication date
CN111079457B (zh) 2023-09-29

Similar Documents

Publication Publication Date Title
US9837857B2 (en) Rectenna
CN102132292B (zh) 用于无线功率发射的无源接收器
US8085130B2 (en) Radio frequency identification tag
CN102214313B (zh) 非接触式通信设备和操作该设备的方法
US20100263945A1 (en) Rechargeable Electromagnetic Pen
CN104821428A (zh) 天线装置
CN211831176U (zh) 一种近场射频能量与数据的协同传输系统
CN102142721A (zh) 射频无线供电系统
CN111079457B (zh) 一种rfid读写器的桥接电调谐天线
JPH07231585A (ja) マイクロ波検波給電回路
CN104184488A (zh) 射频匹配电路及无线通信装置
US10707571B2 (en) Antenna device for mobile terminal and mobile terminal
CN107611617A (zh) 一种基于基片集成波导的电调谐整流天线
CN108242859A (zh) 一种60GHz无线射频能量收集装置
EP4016390B1 (en) Dual system rfid tag
Wagih et al. Wearable E-textile wireless RF power supply based on a textile supercapacitor and a flexible rectenna filament
Merenda Self-adapting impedance matching circuit for UHF RF energy harvester
CN214256619U (zh) 无线传感器和医疗设备
CN105224980A (zh) 双天线无源uhf rfid标签
JP2021129444A (ja) 無線給電装置
US20220069446A1 (en) SAR Reduction Method for LTE and 5G Antenna put at System of Laptop and Convertible Laptop
CN213279647U (zh) 无线iot模组
CN117875340A (zh) 一种射频识别传感器及系统
CN113792563B (zh) 一种双模射频识别传感器、系统及工作方法
Curty et al. Wireless power transmission

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant