CN202423545U - Small antenna for read-write device - Google Patents
Small antenna for read-write device Download PDFInfo
- Publication number
- CN202423545U CN202423545U CN2011205757452U CN201120575745U CN202423545U CN 202423545 U CN202423545 U CN 202423545U CN 2011205757452 U CN2011205757452 U CN 2011205757452U CN 201120575745 U CN201120575745 U CN 201120575745U CN 202423545 U CN202423545 U CN 202423545U
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- antenna
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- write equipment
- coupling loop
- pcb substrate
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Abstract
The utility model discloses a small antenna for a read-write device. The antenna comprises a PCB (printed circuit board) substrate and an antenna unit. An arc groove is reserved on the PCB substrate. At least a pair of pads is disposed on two sides of the arc groove symmetrically. The antenna unit comprises symmetrical dipoles and a rectangular coupling ring. An open end is reserved on one of the short edge of the rectangular coupling ring. Antenna feed points are reserved at the open end. The arc groove starts from outer side of the open end of the coupling ring and stops on one side of the PCB substrate. The arc groove is not contacted with the symmetrical dipoles. One end of a coaxial cable is welded to the feed points at the open end of the coupling ring, the middle of the cable is embedded into the arc groove and is welded onto the pads on two sides of the arc groove, and the other end of the coaxial cable is connected with an antenna interface of the read-write device. The antenna is integrally encased in a matched leather sheath. The small antenna is small in size, stable in performance, and easy for batch machining.
Description
Technical field
The utility model relates to a kind of antenna, relates in particular to a kind of antenna that is applied to the ultrahigh frequency RFID read-write equipment.
Background technology
In the microwave communication field a crucial part---antenna is arranged, be used for receiving and the launched microwave signal.In the utilization of RFID technology, transmission of Information is also accomplished by antenna and electronic tag.At present; The RFID technology has been widely used in false proof field, and it is that electronic tag is attached on the required false proof article that RFID is applied to false proof, utilizes antenna to read electronic labeling information; And being delivered to portable terminal through read-write equipment, portable terminal sends data to remote system and carries out false proof affirmation.And existing read-write equipment is in order to be used with portable terminal, the continuous miniaturization of volume, and this has also proposed new personalized requirement to antenna volume, structure, weight.
Summary of the invention
The technical problem that the utility model will solve is; The present situation that read-write equipment antenna volume to being applied to the false proof field of RFID at present is excessive, structure and shape do not meet individual demand provides a kind of volume little, simple in structure; In light weight; The read-write equipment antenna that is easy to carry about with one, and antenna can put into the protection leather sheath of small-sized read-write equipment easily, is convenient for carrying and uses.
The utility model solves the technical scheme that its technical problem adopted:
A kind of small-sized read-write equipment antenna comprises PCB substrate 1, antenna element 2, it is characterized in that; Offer deep-slotted chip breaker 5 on the said PCB substrate; Said deep-slotted chip breaker 5 bilateral symmetry are provided with a pair of above pad 6, and said antenna element 2 is made up of symmetrical dipole 4 and rectangle coupling loop 3, and said rectangle coupling loop 3 one minor faces are provided with open end; Said open circuit port leaves antenna feed point; Said deep-slotted chip breaker 5 starts from the open end outside of said coupling loop 3, terminates in a side of said PCB substrate 1, and does not contact with said symmetrical dipole 4.
Further, said antenna oscillator is " T " font, and " T " font top is terminal bending structure, and the long limit of bottom and said rectangle coupling loop 3 electrically connects, and is the center line left-right symmetric with the minor face center line of said rectangle coupling loop 3.
Further; Also comprise coaxial cable; Said coaxial cable one end is welded on the antenna feed point of open end of coupling loop 3; The middle part embeds deep-slotted chip breaker 5 together with the coaxial cable outer conductor and through pad 6 the coaxial cable outer conductor is welded on the said PCB substrate 1, and the other end stretches out at a side of said PCB substrate 1.
Further, said antenna element 2 is partial to a side of said PCB substrate 1.
Further, the size of said PCB substrate 1 is less than 116mm * 50mm * 0.6mm.
Further, the length of the top straight line portion of said " T " font symmetrical dipole 4 is 15mm, and live width is 2mm, and terminal bending structure length is 2.5mm, and live width 2mm is 60mm perpendicular to the straight line portion length at said top, live width 1mm.
Further, square coupling loop 3 is of a size of 22mm * 11mm, and live width is 1mm.
Further, the place of electrically connecting, long limit of symmetrical dipole 4 bottoms and rectangle coupling loop 3 is 6.5mm with the distance of the antenna feed point place minor face of rectangle coupling loop 3.
Further, said antenna places in the loam cake 8 of leather sheath 7, and the coaxial cable that stretches out from a side of said PCB substrate links to each other with the said small-sized read-write equipment that is positioned at lower cover 10 through the connecting portion 9 of leather sheath 7.
Further, the adaptation frequency range of antenna is 920MHz～925MHz.
Adopt the beneficial effect of technique scheme to be: because the utility model has adopted the deep-slotted chip breaker structure, coaxial cable embeds wherein and passes through the pad welding of deep-slotted chip breaker both sides, and coaxial cable has been played fixation preferably, helps the stabilized antenna performance; Simultaneously because the precise design of antenna oscillator and coupling loop size, shape makes that in 920MHz～925MHz scope the aerial voltage standing-wave ratio is less than 1.3: 1, antenna performance and read-write equipment matched well.Owing to be provided with the leather sheath that matches with antenna, antenna places in the leather sheath in addition, and antenna also is easy to carry when well being protected.Owing to adopt pcb board as substrate, be convenient to batch machining and installation, cost is extremely low.
Description of drawings
Fig. 1 is the structural representation of the small-sized read-write equipment antenna of the utility model embodiment;
Fig. 2 is the structural representation of leather sheath.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is elaborated.
As shown in Figure 1, a kind of small-sized read-write equipment antenna of the utility model comprises PCB substrate 1, antenna element 2, deep-slotted chip breaker 5, pad 6, and what wherein PCB substrate 1 adopted is the base material of FR-4 grade.
The right side minor face of coupling loop 3 is provided with open end, and antenna feed point is left in the open circuit port.Offer deep-slotted chip breaker 5 on the pcb board 1, the both sides of deep-slotted chip breaker 5 are provided with 5 pairs of pads, and deep-slotted chip breaker 5 starts from the open circuit port left side of coupling loop 3, terminate in a side of PCB substrate 1, and the aperture position of side is set according to antenna and read-write equipment interface position.
Coaxial cable one end is welded on the antenna feed point place of coupling loop 3 open circuit ports, and the middle part is embedded in the deep-slotted chip breaker 5 after the sheath of coaxial line is peeled off, and the middle part coaxial outer conductor is welded to the many on the pad 6 of deep-slotted chip breaker 5 both sides, and this can play fixation.The length that the coaxial line sheath is peeled off can not exert an influence to transmission performance, and coaxial line stretches out with small-sized read-write equipment at the opening part of pcb board 1 one sides through deep-slotted chip breaker 5 and links to each other.
As most preferred embodiment, PCB substrate 1 is of a size of 116mm * 50mm * 0.6mm, and antenna element 2 is of a size of 60mm * 43mm.Rectangle coupling loop 3 is of a size of 22mm * 11mm, and live width is 1mm.The length of T-shape symmetrical dipole 4 top straight line portioies is 15mm, live width 2mm, and terminal bending structure length is 2.5mm, live width 2mm is 60mm perpendicular to the straight line portion length at top, live width 1mm.The place of electrically connecting, long limit of symmetrical dipole 4 bottoms and rectangle coupling loop 3 is 6.5mm with the antenna feed point place of rectangle coupling loop 3 in the distance of minor face.The input impedance of antenna is 50 Ω.Voltage standing wave ratio was less than 1.3: 1 in 920MHz～925MHz scope.
The size of coupling loop and symmetrical dipole can influence input impedance, the voltage standing wave ratio of antenna.Through changing the length and the arrangement of coupling loop, symmetrical dipole, can reach the effect of its operating frequency of adjustment and input characteristic impedance.
As shown in Figure 2; Antenna leather sheath 7 is made up of loam cake 8, lower cover 10 and the two connecting portion 9; Antenna leather sheath 7 left sides of packing into, the coaxial cable that stretches out at pcb board 1 one side openings places links to each other with the small-sized read-write equipment antennal interface that is positioned at lower cover 10 through connecting portion 9.
The utility model passes through the precise design to the coupling loop and the symmetrical dipole of antenna, has reached the matched well of antenna and read-write equipment.Coaxial line has played the effect of fixing coaxial line through being embedded in the deep-slotted chip breaker and being welded on the pad.Outstanding characteristics are that volume is little, in light weight, and are easy to carry about with one after small-sized read-write equipment is connected.It is stable performance as the benefit of substrate that antenna adopts PCB, and applied range is prone to batch machining, and easy for installation, cost is extremely low.
Claims (10)
1. a small-sized read-write equipment antenna comprises PCB substrate (1), antenna element (2), it is characterized in that; Offer deep-slotted chip breaker (5) on the said PCB substrate; Said deep-slotted chip breaker (5) bilateral symmetry is provided with a pair of above pad (6), and said antenna element (2) is made up of symmetrical dipole (4) and rectangle coupling loop (3), and said rectangle coupling loop (3) one minor faces are provided with open end; Said open circuit port leaves antenna feed point; Said deep-slotted chip breaker (5) starts from the open end outside of said coupling loop (3), terminates in a side of said PCB substrate (1), and does not contact with said symmetrical dipole (4).
2. a kind of small-sized read-write equipment antenna according to claim 1; It is characterized in that; Said antenna oscillator is " T " font; " T " font top is terminal bending structure, and the long limit of bottom and said rectangle coupling loop (3) electrically connects, and is the center line left-right symmetric with the minor face center line of said rectangle coupling loop (3).
3. a kind of small-sized read-write equipment antenna according to claim 2; It is characterized in that; Also comprise coaxial cable; Said coaxial cable one end is welded on the antenna feed point of open end of rectangle coupling loop (3), and the middle part embeds deep-slotted chip breaker (5) together with the coaxial cable outer conductor and through pad (6) the coaxial cable outer conductor is welded on the said PCB substrate (1), and the other end stretches out at a side of said PCB substrate (1).
4. according to each described a kind of small-sized read-write equipment antenna of claim 1～3, it is characterized in that said antenna element (2) is partial to a side of said PCB substrate (1).
5. a kind of small-sized read-write equipment antenna according to claim 4 is characterized in that the size of said PCB substrate (1) is less than 116mm * 50mm * 0.6mm.
6. a kind of small-sized read-write equipment antenna according to claim 5; It is characterized in that the length of the top straight line portion of said " T " font symmetrical dipole (4) is 15mm, live width is 2mm; Terminal bending structure length is 2.5mm; Live width 2mm is 60mm perpendicular to the straight line portion length at said top, live width 1mm.
7. a kind of small-sized read-write equipment antenna according to claim 6 is characterized in that said square coupling loop (3) is of a size of 22mm * 11mm, and live width is 1mm.
8. a kind of small-sized read-write equipment antenna according to claim 7 is characterized in that, the place of electrically connecting, long limit of said symmetrical dipole (4) bottom and rectangle coupling loop (3) is 6.5mm with the distance of the antenna feed point of rectangle coupling loop (3) place minor face.
9. a kind of small-sized read-write equipment antenna according to claim 6; It is characterized in that; Said antenna places in the loam cake (8) of leather sheath (7), and the coaxial cable that stretches out from a side of said PCB substrate (1) links to each other with the said small-sized read-write equipment that is positioned at lower cover (10) through the connecting portion (9) of leather sheath (7).
10. a kind of small-sized read-write equipment antenna according to claim 7 is characterized in that the adaptation frequency range of said antenna is 920MHz～925MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205757452U CN202423545U (en) | 2011-12-31 | 2011-12-31 | Small antenna for read-write device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205757452U CN202423545U (en) | 2011-12-31 | 2011-12-31 | Small antenna for read-write device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202423545U true CN202423545U (en) | 2012-09-05 |
Family
ID=46748274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205757452U Expired - Fee Related CN202423545U (en) | 2011-12-31 | 2011-12-31 | Small antenna for read-write device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202423545U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110324466A (en) * | 2019-06-17 | 2019-10-11 | Oppo广东移动通信有限公司 | Mobile terminal |
| CN112054293A (en) * | 2020-10-21 | 2020-12-08 | 北京字节跳动网络技术有限公司 | Electronic device |
-
2011
- 2011-12-31 CN CN2011205757452U patent/CN202423545U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110324466A (en) * | 2019-06-17 | 2019-10-11 | Oppo广东移动通信有限公司 | Mobile terminal |
| CN110324466B (en) * | 2019-06-17 | 2021-04-13 | Oppo广东移动通信有限公司 | Mobile terminal |
| CN112054293A (en) * | 2020-10-21 | 2020-12-08 | 北京字节跳动网络技术有限公司 | Electronic device |
| CN112054293B (en) * | 2020-10-21 | 2023-03-24 | 北京字节跳动网络技术有限公司 | Electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: INVENGO INFORMATION TECHNOLOGY Co.,Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Xing Chunshuang Document name: Notice of termination of patent |
|
| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20191231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |