CN210167506U - Conformal RFID antenna applied to switch cabinet contact - Google Patents
Conformal RFID antenna applied to switch cabinet contact Download PDFInfo
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- CN210167506U CN210167506U CN201921604821.0U CN201921604821U CN210167506U CN 210167506 U CN210167506 U CN 210167506U CN 201921604821 U CN201921604821 U CN 201921604821U CN 210167506 U CN210167506 U CN 210167506U
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Abstract
The utility model discloses an use conformal RFID antenna on cubical switchboard contact, include: the first cavity-backed dipole antenna and the second cavity-backed dipole antenna. First back of the body cavity dipole antenna is installed on cubical switchboard movable contact, and first back of the body cavity dipole antenna includes: the first back cavity structure is fixed on the movable contact of the switch cabinet; the first conformal ceramic blank body is fixed on the first back cavity structure; the broadband dipole antenna is fixed on the first conformal ceramic blank; the first ultrahigh frequency radio frequency identification temperature sensing chip is loaded on the broadband dipole antenna; and the second back cavity dipole antenna is installed on the static contact of the switch cabinet, and the second back cavity dipole antenna comprises: the second back cavity structure is fixed on the static contact of the switch cabinet; the second conformal ceramic blank is fixed on the second back cavity structure; the miniaturized dipole antenna is fixed on the second conformal ceramic blank body. Therefore, the utility model discloses an use conformal RFID antenna on cubical switchboard contact, simple structure is reasonable, and antenna gain is high.
Description
Technical Field
The utility model relates to a radio frequency identification technical field especially relates to an use conformal RFID antenna on cubical switchboard contact.
Background
The Radio Frequency Identification (RFID) technology is an intelligent identification technology which is developed vigorously in the 90 s of the 20 th century and has the advantages of high-speed moving multi-target identification, strong penetrability, severe environment resistance, rapid real-time data acquisition and processing, no need of manual intervention in the identification process and huge application space. The RFID system can be classified according to the different transmitting frequencies of the reader, and the RFID system corresponds to a low frequency band, a high frequency band, an ultrahigh frequency band and a microwave band below 135KHz, 13.56MHz, 860-960MHz and above 2.4GHz respectively. RFID tags can be classified into passive RFID tags and active RFID tags according to the power supply mode. Ultrahigh frequency RFID tags operating in 860-960MHz band have been the hot spot of research in RFID technology due to their advantages of long-distance reading (over 5 meters), multi-tag reading, and strong anti-interference capability.
The sensors include a wide variety of temperature sensors, flow sensors, pressure sensors, magnetic sensors, acceleration sensors, and biosensors, and are important basic elements of the information industry. The temperature sensor is widely used in the fields of industrial and agricultural production, scientific research, daily life application and the like, is the most basic and the most demanding sensor, and accounts for about 50 percent of the total demand of the whole sensor. Compared with temperature sensors of thermocouple, thermistor, platinum wire and other types, the ultrahigh radio frequency temperature sensor has simple structure and integratability, is integrated in an RFID label chip, can detect the temperature of the surrounding environment while realizing automatic identification, and greatly expands the application of RFID technology.
The ultra-high frequency Radio Frequency Identification (RFID) temperature sensing system adopts a technology based on ultra-high frequency radio frequency identification principle and temperature sensing and monitoring, combines two key technologies of passive temperature measurement and wireless transmission, and can solve the limitation of the temperature monitoring technology of various current electric equipment. The temperature on-line monitoring system formed by the ultrahigh radio frequency temperature sensing chip has the two characteristics of being passive and wireless, has the advantages of safety, low cost, good real-time performance, convenience in maintenance and the like, can be used for monitoring the temperature of a cable joint of a power transmission line, a cable head of a Ring Main Unit (RMU), a switch contact of an air circuit breaker, a high-low voltage busbar, a disconnecting switch copper bar, a grounding switch of a transformer substation, a capacitor joint, a transformer joint and the like, and provides a good solution for monitoring the temperature of power equipment.
In the ultrahigh frequency Radio Frequency Identification (RFID) temperature sensing system, two types of core technologies are needed, one is an ultrahigh frequency radio frequency temperature sensing chip, the other is a high-performance RFID antenna meeting the technical index requirements of the temperature sensing chip, and the application of the two types of technologies ensures the wireless transmission distance of the system and the accuracy of temperature monitoring data transmission. The ultra-high radio frequency temperature sensing chip matched with the system accords with ISO/IEC18000-6C standard, has a frequency range of 860MHz-960MHz and a temperature measuring range of minus 40 ℃ to plus 120 ℃, and supports an EPCglobal 1-level 2-generation ultrahigh frequency RFID communication protocol. In order to match the high-performance ultrahigh frequency temperature sensor chip, the matched RFID antenna needs to match the equivalent input impedance of the chip in a conjugate manner, and has the performances of wide antenna bandwidth (860-960MHz), high antenna gain, wide lobe width, directional radiation and the like. Meanwhile, in order to match with a specific use scene of the system, the RFID antenna needs to adjust the impedance, the radiation pattern and the antenna gain of the antenna according to a specific use environment.
The main forms of the currently mainstream ultrahigh frequency identification (RFID) antenna include a dipole antenna, a bent dipole antenna, a printed dipole antenna, a microstrip antenna and a logarithmic spiral antenna. The first three antennas are all linearly polarized antennas, and the last two antennas belong to circularly polarized antennas. Dipole antennas and bent dipole antennas belong to the omni-directional radiating antennas, printed dipole antennas, microstrip antennas and logarithmic spiral antennas are all directional radiating antennas, as in the following table.
The circularly polarized microstrip antenna can obtain better antenna performance, and the read-write distance of the RFID system is ensured. However, the microstrip antenna is usually smaller in bandwidth, and only can obtain an antenna relative bandwidth generally not exceeding 5%, that is, the microstrip antenna cannot directly cover the frequency band of 860-960MHz desired by the system. Meanwhile, microstrip antennas are often large, and the thickness of the antennas is thick, and the antennas are often of a planar structure and are not easy to integrate in a system product with a radian.
The logarithmic spiral antenna can obtain excellent antenna performance, the antenna bandwidth is very wide, and the read-write distance of an RFID system can be ensured. However, the logarithmic spiral antenna has a very high requirement on the processing precision, the processing cost is high, the yield of mass production is low, and the mass production is not favorable. Meanwhile, the antenna also needs a certain antenna thickness, is large in size and is sensitive to the influence of the surrounding antenna environment.
Conventional dipole antenna, bent dipole antenna and printing dipole antenna all belong to the linear polarization antenna, and antenna structure is simple, and the size is less, generally adopts materials such as FPC, can conveniently integrate in there is curved system product. The bandwidth of the antenna can meet the requirement of system indexes, but the gain of the antenna is relatively low, the read-write distance can be influenced, meanwhile, the radiation pattern is omnidirectional radiation, the requirement on the surrounding environment of the antenna is high, and the antenna is easily influenced by metal devices and structural parts around the antenna, so that the impedance and the radiation pattern of the antenna are influenced. On the other hand, the antenna is usually made of FPC and copper paper base materials, the antenna has low bearing power and relatively poor stability.
The prior art scheme has the following defects:
1. most of the existing RFID antennas adopt a microstrip antenna scheme. The antenna bandwidth of the microstrip antenna is small, and the requirement of the system index cannot be met; the antenna has larger size and structure and larger thickness, and is inconvenient to be integrated in the arc system structural member. In a switch cabinet contact structure in an electric power system, an antenna cannot be directly integrated, and if the switch cabinet contact structure needs to be changed, the microstrip is greatly influenced by a metal structural member in the switch cabinet contact structure, so that the antenna gain and the bandwidth can be reduced;
2. the logarithmic spiral antenna has high requirement on processing precision, low yield and high antenna cost, and cannot meet the requirement of large-scale mass production. In a switch cabinet contact structure in an electric power system, logarithmic spiral antennas cannot be directly integrated, and the switch cabinet contact structure needs to be greatly changed; the antenna is also susceptible to metal structural members in the switch cabinet contact structure, resulting in the antenna gain and radiation pattern being affected;
3. conventional dipole antennas, bent dipole antennas and printed dipole antennas have low antenna gain and omnidirectional radiation, and are very easily affected by metal structural members in a contact structure of a switch cabinet, so that the performance of the antenna is obviously reduced, and the read-write index requirements of a system cannot be met. Meanwhile, although the conventional antenna base material is flexible and can be integrated in a switch cabinet contact annular or arc-shaped structural member, the temperature resistance and the power resistance of the FPC base material or the coated paper base material are poor, and the requirements of the performance of the RFID antenna under the complex structure and the metal environment of the switch cabinet contact in the power system cannot be met.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an use conformal RFID antenna on cubical switchboard contact, its simple structure is reasonable, and antenna gain is high.
In order to achieve the above object, the utility model provides an use conformal RFID antenna on cubical switchboard contact, include: the first cavity-backed dipole antenna and the second cavity-backed dipole antenna. First back of the body cavity dipole antenna is installed on cubical switchboard movable contact, and first back of the body cavity dipole antenna includes: the first back cavity structure is fixed on the movable contact of the switch cabinet; the first conformal ceramic blank body is fixed on the first back cavity structure; the broadband dipole antenna is fixed on the first conformal ceramic blank; the first ultrahigh frequency radio frequency identification temperature sensing chip is loaded on the broadband dipole antenna; and the second back cavity dipole antenna is installed on the static contact of the switch cabinet, and the second back cavity dipole antenna comprises: the second back cavity structure is fixed on the static contact of the switch cabinet; the second conformal ceramic blank is fixed on the second back cavity structure; the miniaturized dipole antenna is fixed on the second conformal ceramic blank; the second ultrahigh frequency radio frequency identification temperature sensing chip is loaded on the miniaturized dipole antenna; the first ultrahigh frequency radio frequency identification temperature sensing chip is used for collecting temperature monitoring data of a moving contact of the switch cabinet and transmitting the temperature monitoring data to a remote system; the second ultrahigh frequency radio frequency identification temperature sensing chip is used for collecting temperature monitoring data of the fixed contact of the switch cabinet and transmitting the temperature monitoring data to a far-end system.
The utility model discloses an in an embodiment, adopt laser radium carving technique to combine to plate the technology on broadband dipole antenna is fixed in first conformal ceramic idiosome, with the line customization of walking of broadband dipole antenna on first conformal ceramic idiosome.
In an embodiment of the present invention, the two radiating arms of the broadband dipole antenna have a certain width.
In an embodiment of the present invention, the first conformal ceramic blank and the second conformal ceramic blank both use ceramic blanks with a dielectric constant of 8-9.
In an embodiment of the present invention, the thickness of the first conformal ceramic blank and the second conformal ceramic blank is 3 mm.
In an embodiment of the present invention, the first back cavity structure and the second back cavity structure are made of aluminum.
In an embodiment of the present invention, the first uhf rfid temperature sensing chip is loaded at the feed position of the wideband dipole antenna by using an SMT process.
In an embodiment of the present invention, the second uhf rfid temperature sensing chip is loaded at the feeding position of the miniaturized dipole antenna by using an SMT process.
Compared with the prior art, according to the utility model discloses an use conformal RFID antenna on cubical switchboard contact, simple structure is reasonable, and antenna gain is high, and temperature resistance can be with resistant bearing power performance good.
Drawings
Fig. 1 is a schematic diagram of a conformal RFID antenna applied to a contact of a switch cabinet according to an embodiment of the present invention.
Description of the main reference numerals:
1-broadband dipole antenna, 2-first conformal ceramic blank, 3-first back cavity structure, 4-miniaturized dipole antenna, 5-second conformal ceramic blank, 6-second back cavity structure, 7-moving contact of switch cabinet, 8-static contact of switch cabinet, 9, 10-feeding position.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a conformal RFID antenna applied to a contact of a switch cabinet according to an embodiment of the present invention.
According to the utility model discloses preferred embodiment's a conformal RFID antenna of using on cubical switchboard contact, include: the first cavity-backed dipole antenna and the second cavity-backed dipole antenna. First back of the body cavity dipole antenna is installed on cubical switchboard moving contact 7, and first back of the body cavity dipole antenna includes: the first back cavity structure 3 is fixed on a movable contact 7 of the switch cabinet; the first conformal ceramic blank body 2 is fixed on the first back cavity structure 3; the broadband dipole antenna 1 is fixed on the first conformal ceramic blank 2; the first ultrahigh frequency radio frequency identification temperature sensing chip is loaded on the broadband dipole antenna 1; and the second back cavity dipole antenna is installed on the static contact 8 of the switch cabinet, and the second back cavity dipole antenna includes: the second back cavity structure 6 is fixed on a fixed contact 8 of the switch cabinet; the second conformal ceramic blank 5 is fixed on the second back cavity structure 6; the miniaturized dipole antenna 4 is fixed on the second conformal ceramic blank 5; the second ultrahigh frequency radio frequency identification temperature sensing chip is loaded on the miniaturized dipole antenna 4; the first ultrahigh frequency radio frequency identification temperature sensing chip is used for collecting temperature monitoring data of the moving contact 7 of the switch cabinet and transmitting the temperature monitoring data to a far-end system; the second ultrahigh frequency radio frequency identification temperature sensing chip is used for collecting temperature monitoring data of the fixed contact 8 of the switch cabinet and transmitting the temperature monitoring data to a far-end system.
The utility model discloses an in the embodiment, adopt laser radium carving technique to combine to plate the technology on broadband dipole antenna 1 is fixed in first conformal ceramic idiosome 2, with the line customization of walking of broadband dipole antenna 1 on first conformal ceramic idiosome 2.
In an embodiment of the present invention, the two radiating arms of the broadband dipole antenna 1 have a certain width; the first conformal ceramic blank 2 and the second conformal ceramic blank 5 both adopt ceramic blanks with dielectric constants of 8-9.
In an embodiment of the present invention, the thickness of the first conformal ceramic blank 2 and the second conformal ceramic blank 5 is 3 mm; the first back cavity structure 3 and the second back cavity structure 6 are made of aluminum.
In an embodiment of the present invention, the first uhf rfid temperature sensing chip is loaded at the feeding position 9 of the broadband dipole antenna 1 by using an SMT process; the second UHF RFID temperature sensing chip is loaded at the feed position 10 of the miniaturized dipole antenna 4 by adopting an SMT process.
In practical application, the utility model discloses an use conformal RFID antenna on cubical switchboard contact installs the back of the body chamber dipole antenna of two sets of conformal ceramic substrate respectively on cubical switchboard static contact 8 and cubical switchboard moving contact 7. The first back cavity structure 3, the first conformal ceramic blank 2, the broadband dipole antenna 1 and the first ultrahigh frequency radio frequency identification temperature sensing chip form a first set of back cavity dipole antennas, and the second back cavity structure 6, the second conformal ceramic blank 5, the miniaturized dipole antenna 4 and the second ultrahigh frequency radio frequency identification temperature sensing chip form a second set of back cavity dipole antennas. The broadband dipole antenna 1 is manufactured by a laser etching (LDS) technology combined with a chemical plating process, and the broadband dipole antenna 1 is arranged on the conformal ceramic blank in a routing customization mode. The two radiation arms of the broadband dipole antenna 1 have certain widths, so that the radiation bandwidth of the dipole antenna is ensured; the miniaturized dipole antenna considers that the size is smaller than that of the broadband dipole antenna 1, adopts a radiation antenna arm to shorten, and ensures the resonant frequency of the antenna by optimizing the impedance matching of the antenna. The first conformal ceramic blank 2 and the second conformal ceramic blank 5 both adopt ceramic blanks with dielectric constants of 8-9, on one hand, matching with a switch cabinet contact arc-shaped structure can be guaranteed, on the other hand, bandwidth requirements of an antenna can be guaranteed by the ceramic blanks with certain thicknesses (3mm), meanwhile, the ceramic blanks are stable in structure, temperature resistance requirements of-40 ℃ to +120 ℃ can be met, and meanwhile, current heat effect and power bearing capacity with certain strength can be met. The first back cavity structure 3 and the second back cavity structure 6 are aluminum back cavity structures and are mainly used for fixing arc-shaped ceramic blanks, the fact that the whole conformal RFID antenna can be perfectly fixed on a switch cabinet static contact 8 and a switch cabinet moving contact 7 structure is guaranteed, the aluminum back cavity structure fixes the whole conformal RFID antenna structure on the switch cabinet contact structure through binding belts of fixing screws or springs, meanwhile, the aluminum back cavity structure serves as a reflection ground of a dipole antenna, an omnidirectional radiation directional diagram can be changed into a directional radiation directional diagram with wide lobes, antenna gain is improved, and therefore the reading-writing distance and the reading-writing angle of an RFID system are guaranteed. The feeding position 9(10) is a loading position of an ultrahigh frequency Radio Frequency Identification (RFID) temperature sensing chip, the feeding position 9(10) of the dipole antenna is loaded on the sensor chip by adopting an SMT (surface mount technology), and meanwhile, the impedance matching of the dipole antenna is adjusted, so that the antenna is matched with the input impedance of the sensor chip in a conjugate mode, and the optimal performance of the whole system is guaranteed. The radio frequency identification temperature sensing chip has two functions, on one hand, collects the temperature monitoring data of the switch cabinet contact, and on the other hand, transmits related monitoring data to a remote system through the RFID system.
The utility model discloses a conformal RFID antenna applied to switch cabinet contact adopts the scheme of ultrahigh frequency Radio Frequency Identification (RFID) temperature sensor module to monitor the temperature at the switch cabinet contact position, and the application of temperature sensing and RFID technology in the scheme of power system temperature monitoring; according to the requirements of the contact structure of the switch cabinet, a conformal RFID antenna structure is adopted, so that the antenna is very easy to be installed in a matching way with the contact structure of the switch cabinet, and the connection mechanical property of the original contact structure of the switch cabinet is not changed; by adopting the scheme of the broadband dipole antenna 1 with the reflecting cavity, 860-960MHz broadband coverage of the antenna, 3-5dBi directional gain of the antenna and 60 degrees of 3dB wave beam coverage are realized; the performance of the conformal RFID antenna can reach the performance of the traditional microstrip RFID antenna, and the 3dB wave beam coverage range is superior to that of the traditional microstrip antenna; the antenna is conveniently integrated on a switch cabinet contact structure, and the size of the dipole antenna can be reduced as much as possible while the performance of the antenna is ensured by adopting a conformal ceramic or composite ceramic substrate with a certain thickness and a dielectric constant of 8-9; the ultrahigh frequency Radio Frequency Identification (RFID) temperature sensing chip can be directly arranged at the antenna feed position by SMT, thereby facilitating system integration and large-scale mass production; the antenna reflection cavity structure made of aluminum or other metal materials enables the omnidirectional radiation dipole antenna to be optimized into the directional wide-beam radiation dipole antenna, the antenna gain is improved, meanwhile, the antenna blank and the switch cabinet contact structure are fixed through the structure, all edges and corners of the aluminum or other metal reflection cavity structure are subjected to arc transition treatment, and charges cannot be accumulated or discharged.
In a word, the utility model discloses an use conformal RFID antenna on cubical switchboard contact has following beneficial effect:
1. by adopting the scheme of the conformal RFID antenna, the scheme of the conformal dipole antenna is designed according to the actual radian structure of the contact of the switch cabinet, the structural defects of the original microstrip antenna are overcome, and the performance similar to or even better than that of the microstrip antenna is obtained;
2. the dipole antenna with the metal reflection back cavity is adopted, the antenna gain is high (3-5dBi), the directional radiation is realized, and the optimized antenna is less influenced by the surrounding metal environment;
3. adopt the dielectric constant at the pottery or the compound ceramic substrate of 8 ~ 9, can reduce the size of dipole antenna, on the other hand pottery or compound pottery's temperature resistance, resistant power-carrying performance are all relatively ideal, and pottery or compound ceramic substrate also can require to process into conformal shape according to the arc of cubical switchboard contact structure simultaneously, and the integration that the cooperation metal back of the body cavity structure can be convenient is on cubical switchboard contact structure.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (8)
1. A conformal RFID antenna for use on a switchgear contact, comprising:
first back of body chamber dipole antenna installs on cubical switchboard movable contact, just first back of body chamber dipole antenna includes:
the first back cavity structure is fixed on the movable contact of the switch cabinet;
the first conformal ceramic blank body is fixed on the first back cavity structure;
the broadband dipole antenna is fixed on the first conformal ceramic blank;
the first ultrahigh frequency radio frequency identification temperature sensing chip is loaded on the broadband dipole antenna; and
the second back of the body chamber dipole antenna installs on cubical switchboard static contact, just the second back of the body chamber dipole antenna includes:
the second back cavity structure is fixed on the static contact of the switch cabinet;
the second conformal ceramic blank body is fixed on the second back cavity structure;
the miniaturized dipole antenna is fixed on the second conformal ceramic blank; and
the second ultrahigh frequency radio frequency identification temperature sensing chip is loaded on the miniaturized dipole antenna;
the first ultrahigh frequency radio frequency identification temperature sensing chip is used for collecting temperature monitoring data of the moving contact of the switch cabinet and transmitting the temperature monitoring data to a far-end system;
the second ultrahigh frequency radio frequency identification temperature sensing chip is used for collecting temperature monitoring data of the fixed contact of the switch cabinet and transmitting the temperature monitoring data to a far-end system.
2. The conformal RFID antenna applied to switch cabinet contacts as claimed in claim 1, wherein the fixing of the broadband dipole antenna on the first conformal ceramic blank is performed by customizing the trace of the broadband dipole antenna on the first conformal ceramic blank by using a laser etching technique in combination with a chemical plating process.
3. The conformal RFID antenna applied to contacts of a switch cabinet as claimed in claim 1, wherein the two radiating arms of the broadband dipole antenna have a certain width.
4. The conformal RFID antenna applied to contacts of a switch cabinet of claim 1, wherein the first conformal ceramic blank and the second conformal ceramic blank are ceramic blanks with dielectric constants of 8-9.
5. The conformal RFID antenna applied to contacts of a switch cabinet of claim 1, wherein the first conformal ceramic blank and the second conformal ceramic blank have a thickness of 3 mm.
6. The conformal RFID antenna applied to contacts of a switch cabinet as claimed in claim 1, wherein the first back cavity structure and the second back cavity structure are made of aluminum.
7. The conformal RFID antenna applied to contacts of a switch cabinet as claimed in claim 1, wherein the first UHF RFID temperature sensing chip is loaded at the feeding position of the broadband dipole antenna by using SMT process.
8. The conformal RFID antenna applied to contacts of a switch cabinet as claimed in claim 1, wherein the second UHF RFID temperature sensing chip is loaded at the feeding position of the miniaturized dipole antenna by using SMT process.
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| CN201921604821.0U CN210167506U (en) | 2019-09-25 | 2019-09-25 | Conformal RFID antenna applied to switch cabinet contact |
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| CN201921604821.0U CN210167506U (en) | 2019-09-25 | 2019-09-25 | Conformal RFID antenna applied to switch cabinet contact |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110534894A (en) * | 2019-09-25 | 2019-12-03 | 北京智芯微电子科技有限公司 | Apply the conformal RFID antenna on switch cabinet contact |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110534894A (en) * | 2019-09-25 | 2019-12-03 | 北京智芯微电子科技有限公司 | Apply the conformal RFID antenna on switch cabinet contact |
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