CN112909516A - Antenna, PCB antenna and blood sample storage cabinet - Google Patents
Antenna, PCB antenna and blood sample storage cabinet Download PDFInfo
- Publication number
- CN112909516A CN112909516A CN202110226011.1A CN202110226011A CN112909516A CN 112909516 A CN112909516 A CN 112909516A CN 202110226011 A CN202110226011 A CN 202110226011A CN 112909516 A CN112909516 A CN 112909516A
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- radiating
- antenna
- pcb
- radiating surface
- plane
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
Abstract
The invention relates to the technical field of communication, and particularly discloses a PCB antenna which comprises a PCB substrate, wherein a radiating body and a ground wire are arranged on the front surface of the PCB substrate, the radiating body is perpendicular to the ground wire, a whole-surface ground plane is arranged on the back surface of the PCB substrate, and the distance between the edge of the radiating body and the edge of the PCB substrate is more than or equal to 6 times of the thickness of the PCB substrate. The embodiment has the advantages that the distance between the edge of the radiator and the edge of the PCB substrate is long enough, so that the radiator signal on the front surface of the PCB substrate is prevented from interfering with other antenna signals to influence subsequent signal reading, the reading speed of the embodiment is higher, and the accuracy is higher.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an antenna, a PCB antenna and a blood sample storage cabinet.
Background
The RFID label is also called an Internet of things label, is more and more widely applied, has various use occasions and more requirements on antennas, and the application occasions comprise unmanned retail sale, an intelligent counter, a dining table, a tool cabinet, a library, a file cabinet, a drug storage room, a logistics warehouse, logistics distribution and the like;
the RFID antennas are various in types, and can be specifically classified into the following types:
classifying according to frequency bands: a low-frequency RFID antenna, a high-frequency RFID antenna and an ultrahigh-frequency RFID antenna;
classifying according to antenna forms: the antenna comprises a double dipole antenna, a folding dipole antenna, a printing dipole antenna, a micro-strip antenna and a logarithmic spiral antenna, wherein the micro-strip antenna is most widely applied;
the directional antenna and the omnidirectional antenna are classified according to the directivity;
the classification by polarization is: linear polarized antennas, circular polarized antennas;
classification by beam width: narrow beam antennas, wide beam antennas;
sorting by antenna field distribution: a near field antenna, a far field antenna;
the internet of things antenna in the current market is mostly an omnidirectional antenna, and when the internet of things antenna is applied to an intelligent storage cabinet, cross-talk interference exists in signals among storage cells, so that information reading errors are easily caused.
Disclosure of Invention
The invention provides a microstrip patch directional antenna, which aims to solve the problem that information reading errors are easily caused by cross-reading interference of signals among storage cells when an antenna of the internet of things is mostly an omnidirectional antenna and is applied to an intelligent storage cabinet.
The technical scheme adopted by the invention is as follows:
an antenna, comprising:
the radiator comprises a T-shaped first radiating surface, a rectangular second radiating surface, a step-shaped third radiating surface, a step-shaped fifth radiating surface and a fourth radiating surface, wherein the step-shaped third radiating surface and the step-shaped fifth radiating surface are symmetrically arranged, the fourth radiating surface is connected with a feed end, a first short edge of the second radiating surface is connected with the bottom end of the first radiating surface, a second short edge of the second radiating surface is connected with the third radiating surface, the fourth radiating surface and the fifth radiating surface, and the fourth radiating surface is positioned between the third radiating surface and the fifth radiating surface;
the radiator is perpendicular to the ground wire, the ground wire comprises a first rectangular surface and a T-shaped surface, the top edge of the T-shaped surface is in contact with the first rectangular surface, and the bottom edge of the T-shaped surface is arranged close to the feed end.
Further, the first radiation surface comprises a transverse radiation surface and a longitudinal radiation surface perpendicular to the transverse radiation surface, the length of the transverse radiation surface is 20mm, the width of the transverse radiation surface is 15mm, and the length of the longitudinal radiation surface is 7 mm.
Further, the short side of the second radiating surface has the same size as the long side of the first radiating surface, and the sum of the length of the second radiating surface and the length of the third radiating surface is 64 mm.
Further, the length of the fourth radiation surface is shorter than the length of the third radiation surface and the length of the fifth radiation surface, and the length of the fourth radiation surface is set to be 27 mm.
Further, the dimension of the long side of the first rectangular surface is set to 40 mm.
The invention provides a PCB antenna, which can solve the problem that in the prior art, an antenna of the Internet of things is mostly an omnidirectional antenna, when the antenna is applied to an intelligent storage cabinet, cross-reading interference of signals among storage cells can be avoided due to the existence of signals among the storage cells, and information reading errors are easily caused due to the accurate identification of an RFID label of each storage cell.
The PCB antenna comprises the antenna body and a PCB substrate, wherein the front surface of the PCB substrate is provided with the radiating body and the ground wire, the back surface of the PCB substrate is provided with a whole-surface ground plane, and the distance between the edge of the radiating body and the edge of the PCB substrate is larger than or equal to 6 times of the thickness of the PCB substrate.
Furthermore, the area of the PCB substrate provided with the ground wire is provided with at least one first through hole for connecting the first rectangular surface and the T-shaped surface of the ground wire with the ground surface.
Furthermore, a first bonding pad and a second bonding pad are arranged on the back surface of the PCB substrate, the first bonding pad is connected with the ground plane, and a second through hole is arranged in the second bonding pad area.
Furthermore, the PCB antenna further includes a coaxial cable, a shielding layer of the coaxial cable is connected to the first pad, a signal line of the coaxial cable is connected to the second pad, and the signal line of the coaxial cable passes through the second through hole and is connected to the feeding end of the radiator.
The invention provides a blood sample storage cabinet, which aims to solve the problem that in the prior art, most of antennas of the internet of things are omnidirectional antennas, and when the antennas are applied to an intelligent storage cabinet, cross-reading interference exists in signals among storage cells, so that information reading errors are easily caused.
A blood sample storage cabinet comprises the PCB antenna, the blood sample storage cabinet comprises at least one storage grid, the PCB antenna is arranged in the storage grid, and the spacing between the storage grids is at least 30 cm.
Compared with the prior art, the invention has the beneficial effects that:
1. the antenna provided by the invention has the advantages of simple structure, low cost and easy manufacture, and the working frequency is 902MHZ-928 MHZ;
2. the PCB antenna provided by the invention comprises a PCB substrate, wherein the front side of the PCB substrate is provided with a radiating body and a ground wire, the back side of the PCB substrate is provided with a ground plane, and the distance between the edge of the radiating body and the edge of the PCB substrate is more than or equal to 6 times of the thickness of the PCB substrate;
3. according to the blood sample storage cabinet provided by the invention, the PCB antenna is arranged in each storage grid, the distance between the storage grids is at least 30cm, the problem that the RFID label is read wrongly due to mutual interference of signals of the PCB antennas in the storage grids can be prevented, and the reading accuracy is higher.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic diagram of a radiator structure of a PCB antenna according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a ground plane structure of a PCB antenna according to an embodiment of the present invention;
fig. 3 is a Smith chart of a PCB antenna provided by an embodiment of the present invention;
fig. 4 is a diagram of S11 of a PCB antenna provided by an embodiment of the present invention;
fig. 5 is a 3D radiation pattern of a PCB antenna provided by an embodiment of the present invention;
fig. 6 is an XY-plane lobe pattern of the PCB antenna provided in the embodiment of the present invention;
fig. 7 is a standing wave diagram of a PCB antenna according to an embodiment of the present invention.
In the figure, 11 is a transverse radiating surface, 12 is a longitudinal radiating surface, 2 is a second radiating surface, 3 is a third radiating surface, 4 is a fourth radiating surface, 5 is a fifth radiating surface, 61 is a T-shaped surface, 62 is a first rectangular surface, 7 is a feeding terminal, 81 is a first bonding pad, 82 is a second bonding pad, 83 is a second through hole, and 84 is a first through hole.
Specific real-time mode Smith chart
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Example (b):
fig. 1 shows a schematic structural diagram of an antenna provided by the present invention, which includes a radiator and a ground, wherein, the radiator comprises a T-shaped first radiating surface, a rectangular second radiating surface 2, a step-shaped third radiating surface 3 and a fifth radiating surface 5 which are symmetrically arranged, and a fourth radiating surface 4 connected with a feed end 7, a first short side of the second radiating surface 2 is connected with the bottom end of the first radiating surface, a second short side of the second radiating surface 2 is connected with the third radiating surface 3, the fourth radiating surface 4 and the fifth radiating surface 5, the fourth radiating surface 4 is positioned between the third radiating surface 3 and the fifth radiating surface 5, the radiator is perpendicular to the ground, the ground comprises a first rectangular surface 62 and a T-shaped surface 61, the top edge of the T-shaped surface 61 contacts the first rectangular surface 62 and the bottom edge of the T-shaped surface 61 is arranged close to the feeding end 7.
Specifically, the operating frequency of the antenna provided by this embodiment is 902MHZ to 928MHZ, and it should be noted that the length of each radiation surface of this embodiment may be changed to be applicable to other operating frequency ranges.
Specifically, the antenna provided by the embodiment is controllable in distance, and is particularly suitable for short-distance RFID tag identification, the radio frequency transmitting unit can set different transmitting powers (the transmitting power is expressed by dB), the larger the transmitting power is, the stronger the signal radiated by the antenna is, the longer the read-write distance is, the maximum transmitting power that can be supported by the embodiment is 30dB, and the performance is superior.
Further, the first radiation surface comprises a transverse radiation surface 11 and a longitudinal radiation surface 12 perpendicular to the transverse radiation surface 11, the length of the transverse radiation surface 11 is 20mm, the width of the transverse radiation surface 11 is 15mm, and the length of the longitudinal radiation surface 12 is 7 mm.
Further, the short side of the second radiation surface 2 is the same as the long side of the first radiation surface, and the sum of the length of the second radiation surface 2 and the length of the third radiation surface 3 is 64 mm.
Further, the length of the fourth radiation surface 4 is shorter than the length of the third radiation surface 3 and the length of the fifth radiation surface 5, and the length of the fourth radiation surface 4 is set to be 27 mm.
Further, the long side dimension of the first rectangular surface 62 is set to 40 mm.
This embodiment still provides a PCB antenna, uses foretell antenna, and PCB antenna still includes the PCB base plate, the front of PCB base plate is provided with the irradiator with the ground wire, as shown in fig. 2, the back of PCB base plate is provided with the whole face ground plane, the irradiator edge with the distance at PCB base plate edge is more than or equal to 6 times of PCB base plate thickness, and this embodiment is enough long from PCB base plate edge with what the irradiator edge set up, prevents that the positive irradiator signal of PCB base plate from interfering with other antenna signal each other, influences follow-up signal and reads, and the reading speed of this embodiment is faster, the precision is higher.
Specifically, in this embodiment, the PCB substrate is an epoxy glass cloth laminated board, the thickness of the epoxy glass cloth laminated board is 1.7mm, and the dielectric constant of the PCB substrate is 4.5, that is, the distance from the edge of the radiator to the edge of the PCB substrate is at least set to 9.7 mm.
Further, the irradiator the ground wire with the material that the ground plane adopted is the copper sheet and copper sheet thickness is 35 um.
Further, as shown in fig. 2, the PCB substrate has at least one first through hole 84 in a region where the ground line is disposed, for connecting the ground line and the ground plane.
Specifically, in the present embodiment, a plurality of first through holes 84 are provided in the first rectangular surface 62 and the T-shaped surface 61 of the ground region to connect the ground with the ground plane.
Further, a first pad 81 and a second pad 82 are disposed on the back surface of the PCB substrate, the first pad 81 is connected to the ground plane, and a second via hole 83 is disposed in the area of the second pad 82.
Further, the PCB antenna further includes a coaxial cable, a shielding layer of the coaxial cable is connected to the first land 81, a signal line of the coaxial cable is connected to the second land 82, and the signal line of the coaxial cable passes through the second through hole 84 and is connected to the feeding terminal 7 of the radiator.
Further, the PCB antenna provided in this embodiment further includes a second through hole 83, where the second through hole 83 is used for antenna impedance matching, and the input impedance of the antenna can be changed by adjusting the position of the second through hole 83, so that the performance of the feeding point 7 is optimal.
The embodiment further provides a blood sample storage cabinet, which employs the PCB antenna, and the blood sample storage cabinet includes at least one storage compartment, and the space between the storage compartments is at least 30cm, which is an effective reading distance of the PCB antenna provided in the embodiment.
Further, each storage check of blood sample cabinet that this embodiment provided all is provided with infrared monitoring module, and when infrared monitoring module monitored the blood sample bag and put into the storage check, then read the module and begin to read the label information on the blood sample bag, avoid reading the module and be in the reading state for a long time, cause the energy loss.
It should be noted that, as shown in fig. 3 to fig. 7, the operating frequency of the PCB antenna provided by the present invention is 902MHZ to 928MHZ, the gain is not less than 3dB, and the central standing-wave ratio is less than 2: 1.
the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. An antenna, comprising:
the radiator comprises a T-shaped first radiating surface, a rectangular second radiating surface (2), a step-shaped third radiating surface (3), a step-shaped fifth radiating surface (5) and a fourth radiating surface (4) connected with a feed end (7), wherein the step-shaped third radiating surface and the step-shaped fifth radiating surface are symmetrically arranged, the first short edge of the second radiating surface (2) is connected with the bottom end of the first radiating surface, the second short edge of the second radiating surface (2) is connected with the third radiating surface (3), the fourth radiating surface (4) and the fifth radiating surface (5), and the fourth radiating surface (4) is positioned between the third radiating surface (3) and the fifth radiating surface (5);
the ground wire comprises a first rectangular surface (62) and a T-shaped surface (61), the top edge of the T-shaped surface (61) is in contact with the first rectangular surface (62), and the bottom edge of the T-shaped surface (61) is arranged close to the feeding end (7).
2. The antenna according to claim 1, characterized in that the first radiating plane comprises a transverse radiating plane (11) and a longitudinal radiating plane (12) perpendicular to the transverse radiating plane (11), the length of the transverse radiating plane (11) being 20mm, the width of the transverse radiating plane (11) being 15mm, and the length of the longitudinal radiating plane (12) being 7 mm.
3. An antenna according to claim 1, characterized in that the dimension of the short side of the second radiating plane (2) is the same as the dimension of the long side of the first radiating plane, and the sum of the length of the second radiating plane (2) and the length of the third radiating plane (3) is 64 mm.
4. An antenna according to claim 1, characterized in that the length of the fourth radiating surface (4) is shorter than the length of the third radiating surface (3) and the length of the fifth radiating surface (5), the length of the fourth radiating surface (4) being set to 27 mm.
5. An antenna according to claim 1, characterized in that the dimension of the long side of the first rectangular face (62) is set to 40 mm.
6. A PCB antenna, comprising any one of the antennas of claims 1-5, further comprising a PCB substrate, wherein the front surface of the PCB substrate is provided with the radiator and the ground, the back surface of the PCB substrate is provided with a full-surface ground plane, and the distance between the edge of the radiator and the edge of the PCB substrate is greater than or equal to 6 times the thickness of the PCB substrate.
7. The PCB antenna of claim 6, wherein the area of the PCB substrate provided with the ground has at least one first through hole (84) for connecting the first rectangular surface (62) and the T-shaped surface (61) of the ground with the ground plane.
8. A PCB antenna according to claim 6, wherein the back side of the PCB substrate is provided with a first land (81) and a second land (82), the first land (81) being connected to the ground plane, and a second via being provided in the area of the second land (82).
9. The PCB antenna of claim 8, further comprising a coaxial cable, wherein the shield layer of the coaxial cable is connected to the first land (81), wherein the signal line of the coaxial cable is connected to the second land (82) and wherein the signal line of the coaxial cable is connected to the feed terminal (7) of the radiator through the second via.
10. A blood sample storage cabinet comprising a PCB antenna as claimed in claims 6 to 9, wherein the blood sample storage cabinet comprises at least one storage compartment in which the PCB antenna is located, the storage compartment being spaced apart by at least 30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110226011.1A CN112909516A (en) | 2021-03-01 | 2021-03-01 | Antenna, PCB antenna and blood sample storage cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110226011.1A CN112909516A (en) | 2021-03-01 | 2021-03-01 | Antenna, PCB antenna and blood sample storage cabinet |
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| Publication Number | Publication Date |
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| CN112909516A true CN112909516A (en) | 2021-06-04 |
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| CN202110226011.1A Pending CN112909516A (en) | 2021-03-01 | 2021-03-01 | Antenna, PCB antenna and blood sample storage cabinet |
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| KR20100080199A (en) * | 2008-12-31 | 2010-07-08 | 엘에스산전 주식회사 | Circularly polarized tag antenna having ground surface |
| CN102119453A (en) * | 2008-06-06 | 2011-07-06 | 传感电子有限责任公司 | Broadband antenna with multiple associated patches and coplanar grounding for RFID applications |
| CN102299419A (en) * | 2011-06-17 | 2011-12-28 | 哈尔滨工程大学 | UWB (ultra-wideband) antenna based on Cantor set fractal structure |
| CN103531900A (en) * | 2013-10-15 | 2014-01-22 | 中国计量学院 | Antenna with pedal-shaped surface mounted devices internally connected symmetrically |
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2021
- 2021-03-01 CN CN202110226011.1A patent/CN112909516A/en active Pending
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|---|---|---|---|---|
| CN102119453A (en) * | 2008-06-06 | 2011-07-06 | 传感电子有限责任公司 | Broadband antenna with multiple associated patches and coplanar grounding for RFID applications |
| KR20100080199A (en) * | 2008-12-31 | 2010-07-08 | 엘에스산전 주식회사 | Circularly polarized tag antenna having ground surface |
| CN102299419A (en) * | 2011-06-17 | 2011-12-28 | 哈尔滨工程大学 | UWB (ultra-wideband) antenna based on Cantor set fractal structure |
| CN103531900A (en) * | 2013-10-15 | 2014-01-22 | 中国计量学院 | Antenna with pedal-shaped surface mounted devices internally connected symmetrically |
| CN108336489A (en) * | 2018-02-06 | 2018-07-27 | 北京宏诚创新科技有限公司 | Uhf band RFID label antenna and preparation method thereof for electric conductor surface |
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