CN105470627A - Double-frequency intelligent label antenna - Google Patents
Double-frequency intelligent label antenna Download PDFInfo
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- CN105470627A CN105470627A CN201510801529.8A CN201510801529A CN105470627A CN 105470627 A CN105470627 A CN 105470627A CN 201510801529 A CN201510801529 A CN 201510801529A CN 105470627 A CN105470627 A CN 105470627A
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- intelligent label
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
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Abstract
The invention discloses a double-frequency intelligent label antenna. The double-frequency intelligent label antenna comprises an insulation base material, an ultrahigh frequency antenna and a high frequency antenna, wherein the ultrahigh frequency antenna and the high frequency antenna respectively comprise a corresponding conductive pattern and two signal input terminals, the conductive patterns of the ultrahigh frequency antenna and the high frequency antenna are arranged on one surface of the insulation base material, and the corresponding signal input terminals are arranged on the surface. The double-frequency intelligent label antenna solves problems of mutual interference and miniaturization realization incapability of double-frequency label antennas.
Description
Technical field
The present invention relates to the antenna technology of field of radio frequency and the intelligent label antenna technology of technical field of RFID, the particularly dual-band antenna of RFID intelligent label.
Background technology
Along with the development of technology of Internet of things, the RFID industry as its basis also will welcome the opportunities and challenges of a new round.With regard to current industrial situation, the relevant market of RFID will expand further, and increasing traditional industries will cause the demand to RFID product.
At present, no matter the intelligent label in RFID field is passive smart tag or active intelligent label, is all single frequency tag substantially.Distinguish from the communication frequency of intelligent label, mainly contain low frequency smart label, high frequency smart and ultra-high-frequency intelligent tag.Single-frequency intelligent label functionally can realize single function, carrying out in some shirtsleeve operation, serve very large effect, as Bus Card, its essence is a 13.56MHz single frequency electronics label, only realize the transport cost payment function of communications and transportation link, convenient and swift, use simple, accept by users, be also the most widely used application in current RFID field.The and for example ultrahigh frequency RFID logistic label in logistic storage field, it is a 915MHz single-frequency intelligent label, realizes identification and the data management of the item circulation of middle distance, is widely used in logistic storage field, substantially increase the operating efficiency of logistic storage.The intelligent label of different frequency characteristic, the physical characteristic of itself is widely different, as ultra-high-frequency intelligent tag, its communication distance is general far away, coverage is between several meters to tens meters, and it possesses the communication protocol of fast data exchange and the Anti-knocking characteristic of excellent performance, be applicable to remote many label application.And the communication distance of high frequency smart is generally at several centimetres to tens centimetres, and Anti-knocking poor-performing, be therefore applicable to the application of closely label less.But the chip of high-frequency label generally possesses good fail safe, be therefore adapted at the application of financial field.
In order to allow the advantage of different label realize on same label or card, occurring in industry for many years two kinds of labels being mechanically assembled on a card, having realized two kinds of performances.Although really achieve from the angle of function, there is many hidden danger, the complex manufacturing of such as product; Product reliability is poor, easily damages; Production cost is high, is unfavorable for promoting; The mutual interference problem of high frequency and ultra-high frequency antenna; Miniaturized label etc. cannot be realized.
Thus, a kind of dual-band antenna being easy to produce, reliability is high is provided to be the problem that this area needs solution badly.
Summary of the invention
The present invention is directed to existing dual-frequency label antenna and there is ultra-high frequency antenna and high-frequency tag antenna disturbs mutually, cannot realize miniaturization issues, its object is to provide a kind of stable and reliable for performance and double frequency intelligent label antenna of miniaturization.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of double frequency intelligent label antenna, comprise insulating substrate, a ultra-high frequency antenna and a high frequency antenna, described ultra-high frequency antenna and high frequency antenna comprise corresponding conductive pattern and two signal input terminals respectively, on described ultra-high frequency antenna and high frequency antenna, conductive pattern is arranged on a surface of insulating substrate, and the signal input terminal of correspondence is also arranged on a surface.
Further, two signal input terminals on described ultra-high frequency antenna and two signal input terminals on high frequency antenna regularly arranged on the surface of insulating substrate.
Further, described four rectangular distributions of signal input terminal, the gap between adjacent two terminals is 0.1 ~ 0.5mm.
Further, described ultra-high frequency antenna is dipole antenna or monopole antenna.
Further, two signal input terminals in described ultra-high frequency antenna are coupled together by a ring shaped conductive figure.
Further, the both sides of the ring shaped conductive figure in described ultra-high frequency antenna are provided with the conductive pattern of two divergence forms respectively.
Further, the electric capacity adaptation of a plane is also provided with in described ultra-high frequency antenna, described electric capacity adaptation is be arranged near a conductive pattern of signal input terminal on ring shaped conductive figure, and this conductive pattern is overlapping by the perspective plane of the part figure of insulating barrier and ring shaped conductive figure.
Further, conductive pattern in described high frequency antenna is the ring-shaped inductors type coil being no less than a circle, the first signal input terminal in high frequency antenna is arranged on beyond outermost layer coil, ring-shaped inductors type coil is inwardly coiling extension successively, formation end points is terminated to innermost layer coil, and by a conductive jumper, end points is drawn out to beyond outermost layer coil, by outer transition lead-in wire, secondary signal input terminal is set near the first signal input terminal.
Further again, described wire jumper is a conducting wire, and the two ends size of wire jumper is comparatively large, and the end points of wire jumper two ends difference connecting coil inner terminal and coil outer transition lead wire arranges between wire jumper and coil and can print insulating barrier.
Further again, described wire jumper is printing silver slurry wire jumper, arranges and can print insulating barrier between wire jumper and coil.
Further again, described wire jumper is etching conductive pattern wire jumper, and wire jumper is arranged on the another side of insulating substrate, is coupled together by the end points of via by the two ends of wire jumper and the inner terminal of coil and outer transition lead-in wire.
The double frequency intelligent label antenna utilizing scheme provided by the invention to be formed, its minimum dimension can accomplish 20 × 20mm, and avoid ultra-high frequency antenna and high-frequency tag antenna mutually to disturb, solve the problem that the dimension limit of small sized double frequency intelligent label antenna in industry and dual-band antenna disturb mutually; And scheme provided by the invention is by the manufacture craft to guarantee the existing intelligent label antenna of back compatible, and obtain the function identical with the product used at present.
The simultaneously manufacture craft efficient stable of label antenna provided by the invention, and it can be applicable to the application of all kinds of double frequency intelligent label, has miniaturization, the feature such as integrated, greatly promotes global intelligent label industry development, have good application prospect.
In addition when specific implementation, utilize scheme provided by the invention can provide the double frequency intelligent label antenna of a kind of stable and reliable for performance and small-sized 900MHz ultra-high frequency band and 13.56MHz high-frequency band.
Accompanying drawing explanation
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the conductive pattern schematic diagram of double frequency intelligent label antenna in example one of the present invention;
Fig. 2 is insulating barrier and the auxiliary layer conductive pattern schematic diagram of double frequency intelligent label antenna in example one of the present invention;
Fig. 3 is the schematic diagram of one side auxiliary layer cross-section structure in example one of the present invention;
Fig. 4 is the schematic diagram of two-sided auxiliary layer cross-section structure in example two of the present invention.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
This example, by optimizing Antenna Design, makes antenna performance be significantly improved, and realizes miniaturized double frequency intelligent label antenna.
Example one
See Fig. 1 and Fig. 2, it is depicted as the conductive pattern schematic diagram of the double frequency intelligent label antenna provided in this example.As seen from the figure, the double frequency intelligent label antenna that this example provides mainly comprises insulating substrate 100, ultra-high frequency antenna 200 and high frequency antenna 300 3 part.
Wherein insulating substrate 100 is for carrying ultra-high frequency antenna 200 and high frequency antenna 300, specifically can adopt the one in papery, PET (poly terephthalic acid class plastics) base material, PI (polyimides) base material, epoxy resin base material, to ensure the dependable performance of label antenna.
Ultra-high frequency antenna 200 and high frequency antenna 300 relative to be arranged on insulating substrate 100 1 surfaces 101, form the agent structure of double frequency intelligent label antenna thus.
During specific implementation, ultra-high frequency antenna 200 mainly comprises a ring shaped conductive figure 201 and two signal input terminals 202 and 203, and two signal input terminals 202 are connected with 203 the agent structure that annular conductive pattern 201 forms ultra-high frequency antenna 200 respectively.Wherein, ring shaped conductive figure 201 with the cross central line of insulating substrate 100 (direction as shown) for the axis of symmetry, be distributed in the side on insulating substrate 100 surface, and the medium position be positioned at inside ring shaped conductive figure 201 of two signal input terminal 202 and 203 symmetries.
Go up on this basis, the both sides up and down (direction as shown) also at ring shaped conductive figure 201 in this ultra-high frequency antenna 200 are provided with the conductive pattern 204 and 205 of two divergence forms respectively, realize impedance matching function.
According to actual needs, can be designed to the shape that bends or other any shapes, one end is connected with ring shaped conductive figure 201 conductive pattern of this divergence form, and the other end to be arranged and unsettled along the bearing of trend of insulating substrate 100.By upper and lower two divergence forms conductive pattern between the region 102 that forms for arranging high frequency antenna 300.
In addition, in the double frequency intelligent label Antenna Design of miniaturization, the size of ultra-high frequency antenna is restricted, and conveniently design just cannot make antenna reach the resonance requirement of 900MHz frequency range.Thus, this example is provided with the electric capacity adaptation 600 of a plane at ring shaped conductive figure 201 near signal input terminal, the electric capacity adaptation 600 of this plane is in fact a conductive pattern 601, is overlapped to form the electric capacity adaptation of plane by the perspective plane of the part figure of insulating barrier 602 and ring shaped conductive figure 201.
As shown in Figure 3, a conductive pattern 601 of the electric capacity adaptation 600 of plane and ring shaped conductive figure 201 are isolated by insulating barrier 602.
High frequency antenna 300 in this example, its with the cross central line of insulating substrate 100 (direction as shown) for the axis of symmetry, be distributed in the opposite side on insulating substrate 100 surface, and in region between the conductive pattern 204,205 of upper and lower two divergence forms.
This high frequency antenna 300 contains one group of ring-shaped inductors type coil 301 and two signal input terminals 302 and 306.The number of turns of the coil of this ring-shaped inductors type coil 301 decides according to the chip of coupling and the size of antenna, and shape is also determined according to the actual requirements, for ensureing the performance of antenna in this example, adopts square coil design, and resonance is at the frequency of 13.56MHz the most at last.
A signal input terminal 302 of high frequency antenna 300 is relative to the signal input terminal 202 in ultra-high frequency antenna 200, beyond the outermost layer coil being arranged on ring-shaped inductors type coil 301, and be connected with ring-shaped inductors type coil 301, and ring-shaped inductors type coil 301 successively inwardly coiling extension (be square coiling), formation end points 303 is terminated to innermost layer coil, and end points is drawn out to the end points 304 beyond outermost layer coil by a conductive jumper 400, by outer transition lead-in wire 305, another one signal input terminal 306 is set near first signal input terminal 302, and this signal input terminal 306 is relative with the signal input terminal 203 in ultra-high frequency antenna 200.
Wherein conductive jumper 400 is a conducting wire, and the two ends size of wire jumper is comparatively large, and the end points 304 of each connecting coil inner terminal 303 in wire jumper two ends and coil outer transition lead wire, arranges insulating barrier 500 (as shown in Figure 2) between wire jumper and coil.
As an alternative solution, this conductive jumper 400 also can be printing silver slurry wire jumper, arranges thus and can print insulating barrier 500 (as shown in Figure 2) between this wire jumper 400 and coil.
As shown in Figure 3, the conductive jumper 400 of high frequency antenna strides across ring-shaped inductors type coil 301, is isolated by insulating barrier 500, and is coupled together by the end points 304 of coil inside end points 303 and outer transition lead-in wire.
The high frequency antenna 300 arranged thus and ultra-high frequency antenna 200, make four signal input terminals 202 and 203,302 and 306 regularly arranged on the surface of insulating substrate, and between high frequency antenna 300 and ultra-high frequency antenna 200.Concrete, the signal input terminal 202 and 203 on ultra-high frequency antenna 200 and the signal input terminal 302 and 306 of high frequency antenna 300 are symmetrical arranged, rectangular distribution, and the gap between adjacent two terminals is 0.1 ~ 0.5mm.Because the setting of high-frequency signal input and ultra-high frequency signal input is extremely important for the performance of whole radiofrequency signal network, high-frequency signal input in this example and the plan of establishment of ultra-high frequency signal input, make high-frequency signal input and ultra-high frequency signal input can try one's best near antenna body setting, effectively in order to avoid cause the interference of spurious signal to reduce the performance of antenna; Simultaneously, the gap of carrying out between signal input part according to the size of the signal output port of radio frequency chip in this example is arranged, relative to existing product, gap 0.1 ~ the 0.5mm of signal input part is determined in this example approach, not only meet the demand of chip Miniaturization Design, the transmission of radiofrequency signal can also be ensured and avoid interference simultaneously.
This example of scheme can form the double frequency intelligent label antenna with 900MHz ultra-high frequency band and 13.56MHz high-frequency band accordingly, and this label antenna not only size is little, and effectively can avoid the mutual interference of 900MHz ultra-high frequency band and 13.56MHz high-frequency band.
Wherein, pass through the design of antenna and corresponding signal input in this example approach, effectively ensure that the small size of label antenna.
In addition, due to high frequency (13.56MHz frequency range) and hyperfrequency (900MHz frequency range) descend antenna in working order all can emitting radio frequency signal, also can receive the radiofrequency signal from space, but this signal comprises the radiofrequency signal of this frequency range and the multiple frequency range radiofrequency signal by harmonic wave form simultaneously.By the selecting frequency characteristic of antenna loop, the signal of self frequency range is the strongest, can preferentially be received.But when two groups of antennas lean on very near time, also have a kind of situation of mutual inductance to occur between antenna, radio frequency mutual inductance characteristic will affect operating state and the performance of antenna, reduce antenna sensitivity and efficiency.Therefore this example approach realizes appropriateness isolation by such scheme, effectively avoids the radiofrequency signal of different frequency range mutually to disturb.
Example two
This example, on the basis of example 1 scheme, provides another kind of deformation program, can realize above-mentioned purpose equally.
See Fig. 3, it is depicted as the cutaway view of double frequency intelligent label antenna in example 1, as seen from the figure, the double frequency intelligent label antenna scheme that example 1 provides, a conductive pattern 601 of the electric capacity adaptation of conductive jumper 400 and plane is all arranged on the same surface of insulating substrate 100, adopt corresponding insulating barrier to isolate, be the structure of an one side auxiliary layer for this reason.
For this situation, this example provides a kind of structure of two-sided auxiliary layer, a conductive pattern 601 of the plane electric capacity adaptation in ultra-high frequency antenna is set directly on another surface 103 of insulating substrate 100 relative to ring shaped conductive figure 201 by it, makes directly to be isolated by insulating substrate 100 between a conductive pattern 601 of plane electric capacity adaptation and ring shaped conductive figure 201.
, the conductive jumper 400 of high frequency antenna is also set directly on another surface 103 of insulating substrate 100 relative to ring-shaped inductors type coil 301 meanwhile, makes directly to be isolated by insulating substrate 100 between conductive jumper 400 and ring-shaped inductors type coil 301.The end points 304 gone between to realize conductive jumper 400 and coil inside end points 303 and outer transition is connected, and the position corresponding with the end points 304 that coil inside end points 303 and outer transition go between on insulating substrate 100 of this example offers via 701 and 702.Thus, the conductive jumper 400 of high frequency antenna strides across ring-shaped inductors type coil 301, is isolated by insulating substrate 100, and is coupled together by the end points of via 701 and 702 by coil inside end points and outer transition lead-in wire.
Separately, the conductive jumper 400 in this example specifically can adopt etching conductive pattern wire jumper, and this wire jumper is arranged on the another side 103 of insulating substrate, is coupled together by the end points of via by the two ends of wire jumper and the inner terminal of coil and outer transition lead-in wire.
Thus, form the double frequency intelligent label antenna of two-sided auxiliary layer structure, because auxiliary layer and antenna loop define series-parallel plate condenser of one group of plane layer stack structure, by means of the combination of antenna and plate condenser, resonance and the impedance matching in hyperfrequency and high frequency antenna loop can be realized in less space, realize miniaturized dual-frequency label.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (11)
1. a double frequency intelligent label antenna, comprise insulating substrate, a ultra-high frequency antenna and a high frequency antenna, it is characterized in that, described ultra-high frequency antenna and high frequency antenna comprise corresponding conductive pattern and two signal input terminals respectively, on described ultra-high frequency antenna and high frequency antenna, conductive pattern is arranged on a surface of insulating substrate, and the signal input terminal of correspondence is also arranged on a surface.
2. a kind of double frequency intelligent label antenna according to claim 1, is characterized in that, two signal input terminals on described ultra-high frequency antenna and two signal input terminals on high frequency antenna regularly arranged on the surface of insulating substrate.
3. a kind of double frequency intelligent label antenna according to claim 2, is characterized in that, four rectangular distributions of signal input terminal, and the gap between adjacent two terminals is 0.1 ~ 0.5mm.
4. a kind of double frequency intelligent label antenna according to claim 1, it is characterized in that, described ultra-high frequency antenna is dipole antenna or monopole antenna.
5. a kind of double frequency intelligent label antenna according to claim 1, is characterized in that, two signal input terminals in described ultra-high frequency antenna are coupled together by a ring shaped conductive figure.
6. a kind of double frequency intelligent label antenna according to claim 5, is characterized in that, the both sides of the ring shaped conductive figure in described ultra-high frequency antenna are provided with the conductive pattern of two divergence forms respectively.
7. a kind of double frequency intelligent label antenna according to claim 1, it is characterized in that, the electric capacity adaptation of a plane is also provided with in described ultra-high frequency antenna, described electric capacity adaptation is be arranged near a conductive pattern of signal input terminal on ring shaped conductive figure, and this conductive pattern is overlapping by the perspective plane of the part figure of insulating barrier and ring shaped conductive figure.
8. a kind of double frequency intelligent label antenna according to claim 1, it is characterized in that, conductive pattern in described high frequency antenna is the ring-shaped inductors type coil being no less than a circle, the first signal input terminal in high frequency antenna is arranged on beyond outermost layer coil, ring-shaped inductors type coil is inwardly coiling extension successively, formation end points is terminated to innermost layer coil, and by a conductive jumper, end points is drawn out to beyond outermost layer coil, by outer transition lead-in wire, secondary signal input terminal is set near the first signal input terminal.
9. a kind of double frequency intelligent label antenna according to claim 8, it is characterized in that, described wire jumper is a conducting wire, the two ends size of wire jumper is larger, the end points of wire jumper two ends difference connecting coil inner terminal and coil outer transition lead wire, arranges between wire jumper and coil and can print insulating barrier.
10. a kind of double frequency intelligent label antenna according to claim 8, is characterized in that, described wire jumper is printing silver slurry wire jumper, arranges and can print insulating barrier between wire jumper and coil.
11. a kind of double frequency intelligent label antennas according to claim 8, it is characterized in that, described wire jumper is etching conductive pattern wire jumper, and wire jumper is arranged on the another side of insulating substrate, is coupled together by the end points of via by the two ends of wire jumper and the inner terminal of coil and outer transition lead-in wire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510801529.8A CN105470627A (en) | 2015-11-19 | 2015-11-19 | Double-frequency intelligent label antenna |
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| CN201510801529.8A CN105470627A (en) | 2015-11-19 | 2015-11-19 | Double-frequency intelligent label antenna |
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| CN105470627A true CN105470627A (en) | 2016-04-06 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453037A (en) * | 2016-05-04 | 2017-12-08 | 恩智浦有限公司 | Near field electromagnetic senses（NFEMI）Antenna |
| CN107679612A (en) * | 2017-10-18 | 2018-02-09 | 江苏联恒物宇科技有限公司 | A kind of tamper double frequency RFID label tag and preparation method thereof |
| CN107819207A (en) * | 2017-12-04 | 2018-03-20 | 成都思悟革科技有限公司 | A kind of closely radiator |
| CN108808213A (en) * | 2018-07-10 | 2018-11-13 | 宜兴启明星物联技术有限公司 | UHF label antennas with and preparation method thereof and RFID RFID tags |
| CN112990414A (en) * | 2021-04-06 | 2021-06-18 | 成都德杉科技有限公司 | Low-power-consumption long-read-distance semi-active tag |
| CN111370845B (en) * | 2020-04-10 | 2024-02-27 | 江苏科睿坦电子科技有限公司 | Novel double-frequency fragile RFID tag antenna and production method thereof |
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| CN103530680A (en) * | 2013-09-16 | 2014-01-22 | 杭州电子科技大学 | Dual-frequency radio frequency identification tag and radio frequency identification system with same |
| CN204791106U (en) * | 2015-07-14 | 2015-11-18 | 上扬无线射频科技扬州有限公司 | Dual -frenquency intelligence RFID label |
| CN205159514U (en) * | 2015-11-19 | 2016-04-13 | 上海仪电智能电子有限公司 | Dual -frenquency intelligent label antenna |
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| US20050242961A1 (en) * | 2004-04-30 | 2005-11-03 | Alps Electric Co., Ltd. | Signal receiving apparatus |
| CN101799884A (en) * | 2010-03-26 | 2010-08-11 | 黄佳佳 | Double-frequency tag with low frequency and ultrahigh frequency |
| CN103530680A (en) * | 2013-09-16 | 2014-01-22 | 杭州电子科技大学 | Dual-frequency radio frequency identification tag and radio frequency identification system with same |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453037A (en) * | 2016-05-04 | 2017-12-08 | 恩智浦有限公司 | Near field electromagnetic senses（NFEMI）Antenna |
| CN107453037B (en) * | 2016-05-04 | 2021-10-08 | 恩智浦有限公司 | Near field electromagnetic induction (NFEMI) antenna |
| CN107679612A (en) * | 2017-10-18 | 2018-02-09 | 江苏联恒物宇科技有限公司 | A kind of tamper double frequency RFID label tag and preparation method thereof |
| CN107819207A (en) * | 2017-12-04 | 2018-03-20 | 成都思悟革科技有限公司 | A kind of closely radiator |
| CN107819207B (en) * | 2017-12-04 | 2024-05-28 | 成都思悟革科技有限公司 | Short-distance radiator |
| CN108808213A (en) * | 2018-07-10 | 2018-11-13 | 宜兴启明星物联技术有限公司 | UHF label antennas with and preparation method thereof and RFID RFID tags |
| CN111370845B (en) * | 2020-04-10 | 2024-02-27 | 江苏科睿坦电子科技有限公司 | Novel double-frequency fragile RFID tag antenna and production method thereof |
| CN112990414A (en) * | 2021-04-06 | 2021-06-18 | 成都德杉科技有限公司 | Low-power-consumption long-read-distance semi-active tag |
| CN112990414B (en) * | 2021-04-06 | 2022-09-06 | 成都德杉科技有限公司 | Low-power-consumption long-read-distance semi-active tag |
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