CN102162824A - Online testing method for mass production of ultrahigh frequency (UHF) identification electronic tag antenna - Google Patents
Online testing method for mass production of ultrahigh frequency (UHF) identification electronic tag antenna Download PDFInfo
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- CN102162824A CN102162824A CN2010106161649A CN201010616164A CN102162824A CN 102162824 A CN102162824 A CN 102162824A CN 2010106161649 A CN2010106161649 A CN 2010106161649A CN 201010616164 A CN201010616164 A CN 201010616164A CN 102162824 A CN102162824 A CN 102162824A
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- label antenna
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Abstract
The invention relates to an online testing method for mass production of UHF identification electronic tag antenna. The testing method comprises the following steps: firstly, performing capacitive-coupling on a metal small disc of a probe end and a pad of a tag antenna where the chip is pasted; secondly, performing balance-unbalance and impedance conversion of a signal coupled by the probe via compensation Barron; thirdly, sampling and extracting the power information of several fixed points on a slot line of the signal converted by the compensation Barron via the slot reflectometer principle; and finally, acquiring a reflection coefficient loaded by a port by using the acquired power information of the several points via calculation so as to calculate the input impedance of the tag antenna. The method has the advantages that the input impedance of the tag antenna is measured before the chip is pasted, the production cost is effectively reduced, the matching degree between the tag antenna and the chip is reflected precisely, and the method is suitable for testing various types of tag antennas.
Description
Affiliated technical field
The present invention is a kind of ultrahigh frequency (UHF) radio-frequency (RF) identification (RFID) label antenna on-line testing method; before label antenna does not paste chip; on-line testing is carried out in large-scale label production; do not meet the requirements of label antenna and do sign detecting; and then need not stick chip; reduce production costs to reach, improve label large-scale production reliability.
Background technology
At present, what the method for testing of the large-scale production of electronic tag (Tag) adopted is that the label antenna of producing is sticked chip, then whole electronic tag is utilized outfield (radiation field) test, as TEM Cell.This class methods weak point is: on the one hand, can not measure the input impedance of label antenna accurately, can not reflect the radiation efficiency of antenna accurately; On the one hand, label antenna need be sticked chip during test in addition, can improve greatly production cost like this.The input impedance of patent direct-on-line test label antenna of the present invention, before pasting chip, tests by label, can effectively reduce production cost, and can reflect the matching degree between label antenna and the chip accurately, be fit to the test of various types of label antennas.
Summary of the invention
In order to reduce the cost of label large-scale production, overcome the deficiency that label on-line testing method can not be tested before label antenna pastes chip, patent of the present invention provides a kind of ultrahigh frequency (UHF) radio-frequency (RF) identification (RFID) electronic tag (Tag) antenna large-scale production on-line testing method, can be before label sticks chip, the input impedance of accurate test label antenna, reduce the cost of label, and patent of the present invention is fit to the test of various types of label antennas.
The technical scheme of patent of the present invention is: in the production line process of flowing, utilize the capacitive coupling principle, the accurately input impedance of test label antenna, patent of the present invention can not only be measured the input impedance of single label antenna, and can measure the input impedance of a plurality of label antennas simultaneously.The method that adopts coupling probe, compensation Ba Lun and multiport power measuring system to combine to the test of label antenna input impedance.To single ultrahigh frequency label antenna, at first, paste the bonding pads place by probe end metal roundel and label antenna and carry out the capacitive coupling.Secondly, probe the is coupled signal that gets off carries out balanced-unbalanced and impedance conversion by compensation Ba Lun.Then, will pass through the multiport power measuring system again by the signal that compensation Ba Lun conversion is got off, the power information of several point of fixity is extracted in sampling.At last, utilize these several somes power informations that obtain, calculate, just can obtain the reflection coefficient that port loads, thereby extrapolate the input impedance of label antenna by handling.When a plurality of label antennas are measured simultaneously during to online large-scale production, need consider that the mass production of physical tags antenna adds man-hour, exist a plurality of label antennas to place close and numerously, therefore must consider the influence that label antenna intercouples.
The beneficial effect of patent of the present invention is, a kind of ultrahigh frequency (UHF) radio-frequency (RF) identification (RFID) electronic tag (Tag) antenna large-scale production on-line testing method is provided, before label sticks chip, measure the input impedance of label antenna, effectively reduce production cost, reflect the matching degree between label antenna and the chip accurately, and be fit to the test of various types of label antennas.
Description of drawings
Below in conjunction with drawings and Examples patent of the present invention is further specified.
Fig. 1 is single ultrahigh frequency label antenna impedance detecting method theory diagram.
Fig. 2 is the capacitive coupling synoptic diagram.
Fig. 3 is capacitive coupling equivalent circuit theory figure.
Fig. 4 is the testing impedance schematic diagram.
Fig. 5 is an aerial array coupling effect synoptic diagram on the travelling belt.
Fig. 6 is a plurality of ultrahigh frequency label antenna large-scale production on-line testing method theory diagrams.
Embodiment
Fig. 1 is single ultrahigh frequency label antenna impedance line method of testing theory diagram.
The device systems that single ultrahigh frequency label antenna impedance line test is used comprises central processing unit, microwave signal source, multiport (probe) power measuring system, balanced unbalanced transformer Ba Lun and capacity coupled probe, capacity coupled probe connects multiport (probe) power measuring system by balanced unbalanced transformer Ba Lun, and central processing unit provides signal for multiport (probe) power measuring system by microwave signal source.Equipment also is provided with power module, hummer, display, and power module provides power supply to total system, and hummer, display are connected with central processing unit respectively.Microwave signal source is controlled by central processing unit, can realize frequency hopping work or frequency sweep work.For the broad applicability of measuring system, label antenna input impedance to be measured is imported as canonical variable, and is kept in the central processing unit.The system works principle is, label antenna pastes the bipod and the probe of chip and forms coupling capacitance, signal source is sent the ultrahigh frequency test signal and through Ba Lun coupling capacitance is tested, probe system is measured the signal power that coupling capacitance reflects, data are sent to the impedance that central processing unit calculates the label antenna under this ultrahigh frequency frequency test signal, the draw impedance curve of label antenna, and the label antenna that does not meet design requirement reported to the police.
Fig. 2 is capacity coupled synoptic diagram, and Fig. 3 is capacitive coupling equivalent circuit theory figure, under label antenna subsides bonding pads, and vertical and two probes of label Plane Installation.Form electric capacity between the metal roundel that probe end has, they and label antenna pad.The input impedance of label antenna is Z
t=R
t+ jX
t, coupling capacitance is respectively C
1And C
2, the impedance Z of seeing into from the other end then
In=R
In+ jX
InCan obtain with formula:
ω is the angular frequency of ultrahigh frequency test signal.Utilize following formula Z
tReal part and imaginary part can be expressed as:
R
t＝R
in
Fig. 4 has provided the schematic diagram of single label antenna testing impedance, and compensation Ba Lun and multiprobe power test system can be regarded as the known two-port network of network parameter, and the emissive power size according to measuring can obtain reflection coefficient Γ
In 2, and can calculate impedance Z according to two-port network of network parameter and reflection coefficient
InThereby, can calculate the real part and the imaginary part of label antenna input impedance in conjunction with above-mentioned formula.
Fig. 5 is an aerial array coupling effect synoptic diagram on the travelling belt.Analysis laterally can be arranged several antenna elements on the production line of finite width W, horizontal spacing D between each unit
xFor, longitudinal pitch D
yAnalysis is when various unit interval, and the mutual coupling situation of each port is chosen the unit interval that is fit to the test of scale label antenna, and these mutual coupling situations are fed back to central processing unit, carries out compensating for coupling.
Fig. 6 is a plurality of ultrahigh frequency label antenna large-scale production on-line testing method theory diagrams.System is in the coupling effect of having considered on the basis shown in Figure 1 between the aerial array, and the coupling effect synoptic diagram is seen Fig. 4.When system is measured simultaneously to a plurality of label antennas, coupling effect is fed back to central processing unit, carry out compensating for coupling, thereby measure the impedance of antenna.
Claims (2)
1. super high frequency radio frequency identification electronic label antenna large-scale production on-line testing method is characterized in that: the step of method of testing is poly-to be: at first, paste the bonding pads place by probe end metal roundel and label antenna and carry out the capacitive coupling; Secondly, probe the is coupled signal that gets off carries out balanced-unbalanced and impedance conversion by compensation Ba Lun; Then, will pass through line of rabbet joint reflectometer principle again by the signal that compensation Ba Lun conversion is got off, sampling extracts the power information of several point of fixity on the line of rabbet joint; At last, utilize these several somes power informations that obtain, calculate, just can obtain the reflection coefficient that port loads, thereby extrapolate the input impedance of label antenna by handling.
2. super high frequency radio frequency identification electronic label antenna large-scale production on-line testing method according to claim 1, it is characterized in that: the equipment of its use is that system comprises central processing unit, microwave signal source, multiple probe measurement system, balanced unbalanced transformer Ba Lun and capacity coupled probe, capacity coupled probe connects the multiport power measuring system by balanced unbalanced transformer Ba Lun, and central processing unit provides signal for multiport (probe) power measuring system by microwave signal source; Equipment also is provided with power module, hummer, display, and power module provides power supply to total system, and hummer, display are connected with central processing unit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010616164.9A CN102162824B (en) | 2010-12-24 | 2010-12-24 | Online testing method for mass production of ultrahigh frequency (UHF) identification electronic tag antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010616164.9A CN102162824B (en) | 2010-12-24 | 2010-12-24 | Online testing method for mass production of ultrahigh frequency (UHF) identification electronic tag antenna |
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| Publication Number | Publication Date |
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| CN102162824A true CN102162824A (en) | 2011-08-24 |
| CN102162824B CN102162824B (en) | 2014-11-26 |
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| CN201010616164.9A Expired - Fee Related CN102162824B (en) | 2010-12-24 | 2010-12-24 | Online testing method for mass production of ultrahigh frequency (UHF) identification electronic tag antenna |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091556A (en) * | 2011-10-31 | 2013-05-08 | 国民技术股份有限公司 | Measuring method and system of electronic tag matching impedance |
| CN107247206A (en) * | 2017-05-04 | 2017-10-13 | 上扬无线射频科技扬州有限公司 | HF RPID tags performance detection Online Transaction Processing |
| CN104297566B (en) * | 2014-10-23 | 2017-10-27 | 西安电子科技大学 | Antenna impedance measuring method on super high frequency radio frequency identification electronic tag |
| CN108957148A (en) * | 2018-06-07 | 2018-12-07 | 杭州利尔达展芯科技有限公司 | A kind of PCB antenna test device |
| WO2020224056A1 (en) * | 2019-05-09 | 2020-11-12 | 河源广工大协同创新研究院 | Non-contact antenna impedance measurement method and measurement system therefor |
| CN115541943A (en) * | 2021-06-30 | 2022-12-30 | 荣耀终端有限公司 | Radio frequency test probe structure, radio frequency test device and system |
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| CN101592704A (en) * | 2008-05-28 | 2009-12-02 | 北京中食新华科技有限公司 | Radio frequency identification RFID test method |
| CN101750547A (en) * | 2009-07-08 | 2010-06-23 | 中国科学院自动化研究所 | Measuring system and measuring method for power contour of reader-writer antenna |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091556A (en) * | 2011-10-31 | 2013-05-08 | 国民技术股份有限公司 | Measuring method and system of electronic tag matching impedance |
| CN103091556B (en) * | 2011-10-31 | 2016-03-30 | 国民技术股份有限公司 | A kind of measuring method of electronic tag matched impedance and system |
| CN104297566B (en) * | 2014-10-23 | 2017-10-27 | 西安电子科技大学 | Antenna impedance measuring method on super high frequency radio frequency identification electronic tag |
| CN107247206A (en) * | 2017-05-04 | 2017-10-13 | 上扬无线射频科技扬州有限公司 | HF RPID tags performance detection Online Transaction Processing |
| CN108957148A (en) * | 2018-06-07 | 2018-12-07 | 杭州利尔达展芯科技有限公司 | A kind of PCB antenna test device |
| CN108957148B (en) * | 2018-06-07 | 2020-07-24 | 杭州利尔达展芯科技有限公司 | PCB antenna testing arrangement |
| WO2020224056A1 (en) * | 2019-05-09 | 2020-11-12 | 河源广工大协同创新研究院 | Non-contact antenna impedance measurement method and measurement system therefor |
| CN115541943A (en) * | 2021-06-30 | 2022-12-30 | 荣耀终端有限公司 | Radio frequency test probe structure, radio frequency test device and system |
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| Publication number | Publication date |
|---|---|
| CN102162824B (en) | 2014-11-26 |
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