CN218827816U - Near field antenna and antenna module and drawer cabinet that have it - Google Patents
Near field antenna and antenna module and drawer cabinet that have it Download PDFInfo
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- CN218827816U CN218827816U CN202223246572.7U CN202223246572U CN218827816U CN 218827816 U CN218827816 U CN 218827816U CN 202223246572 U CN202223246572 U CN 202223246572U CN 218827816 U CN218827816 U CN 218827816U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model discloses a near field antenna and antenna module and drawer cabinet that have it, near field antenna include the dielectric slab, and the surface of dielectric slab is equipped with feeder and feeder pad, and the feeder includes intercouple's internal coupling frame and external coupling frame, and the internal coupling frame includes the first metal strip that a plurality of intervals set up, and the external coupling frame includes the second metal strip that a plurality of intervals set up, and first metal strip and second metal strip dislocation overlapping distribution; the feeder line pad is overlapped with the first metal strip or the second metal strip; even if the size of the segmented coupling coil is increased, the magnetic field is uniformly distributed, which is beneficial to improving the read-write rate.
Description
Technical Field
The utility model belongs to the technical field of integrated circuit design and manufacturing, concretely relates to near field antenna and antenna module and drawer cabinet that have it.
Background
Near-field antennas have been widely studied and applied in the fields of sensitive product tracking, transportation, medical products, medical logistics, biosensing, and the like; at present, in an RFID near field reader, a near field antenna generally implements near field communication in a near field coupling manner, that is, the near field antenna is in a closed loop or a closed loop structure, and the near field antenna is driven by a reader to scan a product, however, the above near field antenna faces an outstanding problem in application, when the electrical size of the near field antenna is large, the phase of current on the perimeter of the near field antenna changes, which causes the current to easily reverse, so that the magnetic field distribution of the near field antenna is not uniform, further causes the near field antenna to have a large reading blind area, and the read-write rate of the product is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a near field antenna and antenna module that has it, when near field antenna's electric size is bigger, still can have comparatively even magnetic field distribution, help improving the read-write rate.
In order to achieve the above purpose, the utility model is realized by the following technical proposal: the near-field antenna comprises a dielectric plate, wherein a feeder line and a feeder line bonding pad are arranged on the surface of the dielectric plate, the feeder line comprises an inner coupling frame and an outer coupling frame which are coupled with each other, the inner coupling frame comprises a plurality of first metal strips which are arranged at intervals, the outer coupling frame comprises a plurality of second metal strips which are arranged at intervals, and the first metal strips and the second metal strips are staggered, overlapped and distributed; the feed line pad overlaps the first metal strip or the second metal strip.
Furthermore, the feeder line pads comprise a plurality of feeder line pads, wherein one end of each of the two feeder line pads is provided with a welding block, the other end of each of the two feeder line pads is bent in the opposite direction to form two transmission lines, and the two transmission lines are overlapped with the first metal strip or the second metal strip.
Furthermore, at least one of the transmission lines is provided with a concave opening.
Further, the length of the feeder pad is one quarter of the wavelength of the input signal, and the total length of the two transmission lines is one quarter of the wavelength of the input signal.
Further, the length of the first metal strip is one quarter of the wavelength of the input signal, and the length of the second metal strip is one quarter of the wavelength of the input signal.
Furthermore, the first metal strips are distributed at four edges and four corners of the dielectric plate, and the first metal strips at the four corners of the dielectric plate are bent in a round angle manner; the second metal strips are distributed on four sides of the dielectric plate.
There is also provided an antenna assembly comprising a metal plate and at least one near field antenna as described above, provided on one side of the metal plate and spaced from the metal plate.
Further, the width of the first metal strip is smaller than the width of the second metal strip, or the width of the second metal strip is smaller than the width of the first metal strip.
Further, the antenna assembly includes a plurality of near-field antennas, the dielectric plates have long sides and short sides, two of the dielectric plates are disposed on the same side of the metal plate, and one of the dielectric plates is rotated by 0 ° to 180 ° with respect to the other dielectric plate.
Still provide a drawer cabinet, including the cabinet body, reader writer and as above the antenna module, reader writer and antenna module all install and locate the cabinet body, just the antenna module with the reader writer is connected.
The utility model discloses following beneficial effect has:
in the near field antenna of the present invention, because the first metal strip and the second metal strip are distributed in a staggered manner, the overlapping portion of the first metal strip and the second metal strip is used to implement capacitance loading, and a capacitance value of a suitable size can be obtained by changing the distance between the inner coupling frame and the outer coupling frame and the length of the overlapping portion of the first metal strip and the second metal strip, so that the resonance of the inductance on each section of the first metal strip and the second metal strip and the resonance of the capacitance at the center frequency of the antenna can be realized; the overlapping part of the first metal strip and the second metal strip generates capacitance, the inductance caused by the length or the width of the first metal strip and the second metal strip can be offset, the accumulation of current phases along the feeder line can be reduced by adopting the sectional coupling coil, so that the phase delay of two adjacent parts is close to zero, the current can be transmitted along the same direction, and the current on the sectional coupling coil is in the same direction, so that the near-field antenna still has stronger magnetic field intensity and more uniform magnetic field distribution when the electric size of the near-field antenna is larger, and the read-write rate is improved
The utility model discloses an antenna module includes foretell near field antenna, and its beneficial effect refers to the beneficial effect of above-mentioned near field antenna, and it is here not redundant and repeated.
The utility model discloses a drawer cabinet includes foretell antenna module, and the beneficial effect of the above-mentioned antenna module is referred to its beneficial effect, and it is unnecessary here to give a redundant description.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required 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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
Fig. 1 is a schematic diagram of a near field antenna provided in an embodiment of the present invention;
fig. 2 is a top view of a near field antenna provided by an embodiment of the present invention;
fig. 3 is a top view of an antenna assembly provided in embodiment 2 of the present invention;
fig. 4 is a schematic view of a drawer cabinet provided in embodiment 3 of the present invention;
fig. 5 is a schematic diagram of an antenna assembly and an installation part according to embodiment 3 of the present invention.
The labels in the figures illustrate:
1. a dielectric plate; 2. a feeder pad; 3. an inner coupling frame; 4. an outer coupling frame; 5. a metal plate; 6. a cabinet body; 7. a reader/writer; 20. a transmission line; 21. a recessed port; 22. welding the blocks; 30. a first metal strip; 40. a second metal strip; 51. an installation part.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Example 1
Referring to fig. 1-2, an embodiment of the present invention provides a near field antenna, including dielectric-slab 1, be equipped with feeder and feeder pad 2 on the surface of dielectric-slab 1, the feeder includes intercouple's in-coupling frame 3 and out-coupling frame 4, in-coupling frame 3 includes the first metal strip 30 that a plurality of intervals set up, out-coupling frame 4 includes the second metal strip 40 that a plurality of intervals set up, first metal strip 30 and 40 dislocation overlapping distributions of second metal strip, feeder pad 2 overlaps with first metal strip 30 or second metal strip 40.
Through the structure, in practical application, the feeder in the near field antenna of the embodiment of the utility model is a segmented coupling coil, the feeder pad 2 is used for connecting an external director (not shown in the figure), the junction of the director and the feeder pad is a positive pole, when the welding point of the external director extends to the left side for the right side on the feeder pad 2 for welding, the current is clockwise, and when the welding point of the external director is welded from the left side to the right side on the feeder pad 2, the current is counterclockwise; because the first metal strips 30 and the second metal strips 40 are staggered, overlapped and distributed, the first metal strips 30 are positioned inside, the second metal strips 40 are positioned outside, the first metal strips 30 are not contacted with the second metal strips 40, and the overlapped parts of the first metal strips 30 and the second metal strips 40 are used for realizing capacitance loading; a signal is input through the feeder pad 2, and since the feeder pad 2 overlaps the first metal strip 30 or the second metal strip 40, the signal may be coupled to the first metal strip 30 or the second metal strip 40, and coupled to the second metal strip 40 by the first metal strip 30, or coupled to the first metal strip 30 by the second metal strip 40, and so on, and in this way flow in the feeder; a capacitance value with a proper size can be obtained by changing the distance between the inner coupling frame 3 and the outer coupling frame 4 and the length of the overlapped part of the first metal strip 30 and the second metal strip 40, so that the resonance of the inductance on each section of the first metal strip 30 and the second metal strip 40 and the capacitance at the central frequency of the antenna can be realized; at this time, the overlapping part of the first metal strip 30 and the second metal strip 40 generates capacitance, so that the inductance caused by the length or the width of the first metal strip 30 and the second metal strip 40 can be offset, the accumulation of the current phase along the feeder line can be reduced by adopting the segmented coupling coil, so that the phase delay of two adjacent parts is close to zero, the current can be transmitted along the same direction, because the current on the segmented coupling coil is in the same direction, uniform magnetic field distribution is generated on the premise that the magnetic field is strong enough in the near field range, when the electric size of the near field antenna is large, the near field antenna still has strong magnetic field intensity and uniform magnetic field distribution, and the read-write rate is improved.
In some embodiments, the feeder pads 2 include a plurality of feeder pads 2, wherein two feeder pads 2 have a solder bump 22 at one end and two transmission lines 20 bent in opposite directions at the other end, and the two transmission lines 20 overlap with the first metal strip 30 or the second metal strip 40; the welding block 22 is used for connecting an external guider, so that the external guider can be conveniently welded, the welding area is increased, and welding errors are avoided.
Specifically, in the present embodiment, the two transmission lines 20 are overlapped with the second metal strip 40 in a staggered manner, and the transmission lines 20 are overlapped with the second metal strip 40 with a gap, so that the overlapped part of the transmission lines 20 and the second metal strip 40 generates capacitance to cancel out inductance caused by the length and the width of the transmission lines 20 or the second metal strip 40, thereby reducing phase accumulation of current along the transmission lines 20 and the second metal strip 40, ensuring that the current is transmitted along the same direction, and enabling the transmission lines 20 to input signals to the outcoupling frame 4.
Specifically, in this embodiment, the number of the feeder pads 2 is two, a recessed opening 21 is provided on one transmission line 20, the recessed opening 21 is located at a position where the transmission line 20 is connected to the feeder pad 2, and the provision of the recessed opening 21 on the transmission line 20 can perform a function of matching the inductance at that position with the capacitance.
Specifically, the length of the feeder pad 2 is one quarter of the wavelength of the input signal, and the total length of the two transmission lines 20 is one quarter of the wavelength of the input signal, so that the signal can be transmitted to the feeder line with lower loss as a signal input terminal.
As a preferred embodiment, the feeder pad 2 may be formed in a zigzag shape as long as the total length of the feeder pad 2 and the transmission line 20 is one quarter of the wavelength of the input signal, so that space can be saved and the size of the near field antenna can be made smaller.
In the present embodiment, the length of the first metal strip 30 is one quarter of the wavelength of the input signal; when the length of the first metal strip 30 is one-fourth of the wavelength of the input signal, the transmission and reception conversion efficiency of the antenna is high, the efficiency of tag identification can be improved, and tag identification is facilitated, and in addition, the length of the first metal strip 30 is one-fourth of the wavelength, so that resonance of the antenna is facilitated, and accumulation of inductance on the first metal strip 30 can be avoided.
In the embodiment, the length of the second metal strip 40 is one quarter of the wavelength of the input signal, when the length of the second metal strip 40 is one quarter of the wavelength of the input signal, the transmission and reception conversion efficiency of the antenna is high, which is beneficial to the identification of the tag, and in addition, the length of the second metal strip 40 is one quarter of the wavelength, which is beneficial to the resonance of the antenna, so that the accumulation of inductance on the second metal strip 40 can be avoided.
As a preferred embodiment, the first metal strips 30 are distributed on four sides and four corners of the dielectric plate 1, and the first metal strips 30 at the four corners of the dielectric plate 1 are all bent in a round angle; the second metal strips 40 are distributed at the four sides of the dielectric plate 1; adopt this kind of distribution mode, at first guaranteed the dislocation overlap distribution of first metal strip 30 and second metal strip 40, realized the electric capacity loading at the overlap part of first metal strip 30 and second metal strip 40, secondly all be the fillet at the first metal strip 30 of 1 four corners department of dielectric-slab and buckle, guaranteed that first metal strip 30 is buckling, has a fillet to do the arc transition, can be convenient for the circulation of electric current.
Specifically, in this embodiment, the first metal strips 30 at the four corners of the dielectric plate 1 are all bent at 90 ° round corners, and the 90 ° round corners are bent to ensure that the first metal strips 30 are smooth when being bent.
Example 2
Referring to fig. 1-3, an antenna assembly according to an embodiment of the present invention includes a metal plate 5 and at least one near field antenna as described in embodiment 1, the near field antenna is disposed on one side of the metal plate 5 and has a space with the metal plate 5, the metal plate 5 is disposed on one side of the dielectric plate 1 away from the feeder, and the space between the near field antenna and the metal plate 5 is 5-30mm, the larger the space is, the higher the antenna transmitting power is, and the higher the gain is.
Optionally, the width of the first metal strip 30 is smaller than the width of the second metal strip 40, or the width of the second metal strip 40 is smaller than the width of the first metal strip 30, in a specific embodiment, when the dielectric plate 1 is installed farther from the metal plate 5, the capacitance is smaller, and in order to match the inductance and the capacitance, the width of the first metal strip 30 is smaller than the width of the second metal strip 40, so that the inductance is smaller, and the inductance and the capacitance are matched; when the dielectric plate 1 is installed closer to the metal plate 5, the capacitance is larger, and in order to match the inductance and the capacitance, the width of the first metal strip 30 is the same as the width of the second metal strip 40, so that the inductance is larger, and the inductance and the capacitance are matched.
Specifically, referring to fig. 3 and 5, the antenna assembly includes a plurality of near field antennas as described in embodiment 1, where the dielectric plates 1 of two of the near field antennas have long sides and short sides, and one of the dielectric plates 1 rotates by 0 ° to 180 ° relative to the other dielectric plate 1, so that the antenna assembly can radiate a wider area and have a wider radio frequency scanning range while ensuring that the magnetic field strength is sufficiently large, thereby increasing the reading rate of the antenna assembly. It is to be noted that one of the dielectric plates 1 is rotated by 90 ° clockwise or counterclockwise with respect to the other dielectric plate 1 so that the long side of one dielectric plate is rotated by 90 ° clockwise or counterclockwise in parallel with the short side of the other dielectric plate 1, thereby increasing the scanning range of the antenna assembly.
Example 3
Please refer to fig. 1-5, the embodiment of the present invention provides a drawer cabinet, including cabinet body 6, reader/writer 7 and embodiment 3 the antenna assembly, the cabinet body 6 is all installed and located to reader/writer 7 and antenna assembly, and antenna assembly and reader/writer 7 are connected, wherein feeder and feeder pad 2 on the antenna assembly can be towards metal sheet 5 setting, also can be towards the inside setting of cabinet body 6, and reader/writer 7 can drive antenna assembly scanning the consumptive material in the cabinet body 6.
Specifically, reader-writer 7 fixed mounting still is equipped with a plurality of installation departments 51 on the cabinet body 6 on metal sheet 5, and the antenna module is installed on installation department 51, and installation department 51 is for metal sheet 5 one side bending type that deviates from dielectric plate 1 to there is the interval between metal sheet 5 and the cabinet body 6 lateral wall, thereby can avoid the antenna module to receive the influence of cabinet body 6 lateral wall. For example, in the case of an accidental impact on the side wall of the cabinet during installation or transportation, the design of the mounting portion 51 in this embodiment can prevent the antenna assembly from being damaged, and in addition, the mounting portion 51 can stably mount the antenna assembly on the cabinet 6.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A near field antenna is characterized by comprising a dielectric plate, wherein a feeder line and a feeder line bonding pad are arranged on the surface of the dielectric plate, the feeder line comprises an inner coupling frame and an outer coupling frame which are coupled with each other, the inner coupling frame comprises a plurality of first metal strips which are arranged at intervals, the outer coupling frame comprises a plurality of second metal strips which are arranged at intervals, and the first metal strips and the second metal strips are staggered, overlapped and distributed; the feed line pad overlaps the first metal strip or the second metal strip.
2. A near field antenna according to claim 1, wherein the feed line pads comprise a plurality of feed line pads, two of the feed line pads have a solder bump at one end and two transmission lines folded in opposite directions at the other end, and the two transmission lines overlap with the first metal strip or the second metal strip.
3. A near field antenna according to claim 2, wherein at least one of the transmission lines is provided with a notch.
4. A near field antenna according to claim 3, wherein the length of the feed pad is one quarter of the wavelength of the input signal and the total length of the two transmission lines is one quarter of the wavelength of the input signal.
5. A near field antenna according to claim 4, wherein the length of the first strip is a quarter of the wavelength of the input signal and the length of the second strip is a quarter of the wavelength of the input signal.
6. A near field antenna according to any of claims 1 to 5, wherein the first metal strips are distributed on four sides and four corners of the dielectric plate, and the first metal strips at the four corners of the dielectric plate are bent in a round angle manner; the second metal strips are distributed on four sides of the dielectric plate.
7. An antenna assembly, characterized in that it comprises a metal plate and at least one near field antenna according to any of claims 1-6, which near field antenna is provided on one side of the metal plate and at a distance from the metal plate.
8. The antenna assembly of claim 7, wherein the width of the first metal strip is less than the width of the second metal strip, or the width of the second metal strip is less than the width of the first metal strip.
9. The antenna assembly of claim 8, wherein said antenna assembly comprises a plurality of said near field antennas, said dielectric slabs having long sides and short sides, wherein two of said dielectric slabs are disposed on a same side of said metal slab, and wherein one of said dielectric slabs is rotated by 0 ° -180 ° with respect to the other of said dielectric slabs.
10. A chest of drawers, comprising a cabinet body, a reader/writer and an antenna assembly as claimed in any one of claims 7 to 9, the reader/writer and the antenna assembly being mounted on the cabinet body and the antenna assembly being connected to the reader/writer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223246572.7U CN218827816U (en) | 2022-12-05 | 2022-12-05 | Near field antenna and antenna module and drawer cabinet that have it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223246572.7U CN218827816U (en) | 2022-12-05 | 2022-12-05 | Near field antenna and antenna module and drawer cabinet that have it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218827816U true CN218827816U (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223246572.7U Active CN218827816U (en) | 2022-12-05 | 2022-12-05 | Near field antenna and antenna module and drawer cabinet that have it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218827816U (en) |
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2022
- 2022-12-05 CN CN202223246572.7U patent/CN218827816U/en active Active
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