CN210074151U - Near-field detection antenna - Google Patents
Near-field detection antenna Download PDFInfo
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- CN210074151U CN210074151U CN201921004859.4U CN201921004859U CN210074151U CN 210074151 U CN210074151 U CN 210074151U CN 201921004859 U CN201921004859 U CN 201921004859U CN 210074151 U CN210074151 U CN 210074151U
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Abstract
The utility model discloses a near field detection antenna, which is characterized in that the near field detection antenna comprises a circuit board, an outer ring antenna and one to more inner ring antennas; the circuit board is provided with a plurality of printing planes, the printing planes comprise a reflecting plane and one to a plurality of first planes, and the one to a plurality of first planes are positioned on one side of the reflecting plane; the outer ring antenna and the one or more inner ring antennas are arranged on the one or more first planes. The utility model discloses a set up the plane of reflection, reduce the interference of near field antenna, save space simultaneously, be favorable to small-scale circuit printing.
Description
Technical Field
The utility model relates to a near field antenna technical field, more specifically say, relate to a near field detection antenna.
Background
The space distance between the existing near-field detection antenna and other circuits is close, so that the interference to the circuits is large; if the near-field detection antenna is far away from other circuits, space waste is caused, and the problems of small-scale circuit printing and the like are not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model provides a near field detection antenna, which solves the problems that the space distance between the near field detection antenna and other circuits is close to the space, and the interference to the circuits is large in the prior art; if the near-field detection antenna is far away from other circuits, space waste is caused, and the problems of small-scale circuit printing and the like are not facilitated.
The utility model provides a near field detection antenna, which comprises a circuit board, an outer ring antenna and one to a plurality of inner ring antennas;
the circuit board is provided with a plurality of printing planes, the printing planes comprise a reflecting plane and one to a plurality of first planes, and the one to a plurality of first planes are positioned on one side of the reflecting plane;
the outer ring antenna and the one or more inner ring antennas are arranged on the one or more first planes.
In the near field detection antenna of the present invention, the inner ring antenna and the outer ring antenna form a coupling inductor.
In the near field detection antenna of the present invention, each of the first planes has a peripheral region, the outer ring antenna is disposed in the peripheral region, and the inner ring antenna is disposed in the inner region, and the inner region is surrounded by the peripheral region or is disposed in the first plane.
In the near field detection antenna of the present invention, the outer ring antenna and the one to a plurality of inner ring antennas are disposed in the same first plane.
In the near field detection antenna of the present invention, the outer ring antenna and the one to a plurality of inner ring antennas are respectively disposed in different ones of the first plane.
Near field detection antenna in, one to a plurality of the number of inner circle antenna is N, interior region divide into N parts, N the inner circle antenna is the heliciform and sets up respectively in N in the part.
In the near field detection antenna of the present invention, the antenna further includes an antenna circuit, the antenna circuit includes a feeding device, and the outer ring antenna is electrically connected to the feeding device.
In the near field detection antenna of the present invention, the antenna circuit further includes one or more comparison circuits;
the one or more comparison circuits are respectively and electrically connected to the one or more inner ring antennas.
In the near field detection antenna of the present invention, one or more inner loop antennas are arranged in pairs to form one or more inner loop antenna groups;
the antenna circuit further comprises one to more comparison circuits;
one or more of the comparison circuits are respectively and electrically connected with one or more pairs of the inner antenna groups.
In the near field detection antenna of the present invention, the plurality of printing planes further include a second plane, and the second plane is located on the other side of the reflection plane;
the antenna circuit is disposed on the second plane.
The utility model discloses following beneficial effect has: by arranging the reflecting plane, the interference of the near-field antenna is reduced, the space is saved, and the small-scale circuit printing is facilitated.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a perspective view of a near-field detection antenna according to an embodiment of the present invention;
fig. 2 is a schematic side view of a circuit board according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating coupling between an outer-ring antenna and an inner-ring antenna according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an outer-ring antenna and an inner-ring antenna according to a first embodiment of the present invention;
fig. 5 is a perspective view of an outer-ring antenna and an inner-ring antenna according to a second embodiment of the present invention;
fig. 6 is an exploded view of an outer-ring antenna and an inner-ring antenna according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of an outer-ring antenna and an inner-ring antenna according to a third embodiment of the present invention;
fig. 8 is a schematic structural diagram of an outer-ring antenna and an inner-ring antenna according to a fourth embodiment of the present invention;
fig. 9 is a schematic structural diagram of an outer-ring antenna and an inner-ring antenna according to a fifth embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a perspective view of a near field detection antenna provided by an embodiment of the present invention, which includes a circuit board 1, an outer ring antenna 2 and one or more inner ring antennas 3.
Referring to fig. 2, fig. 2 is a schematic side view of a circuit board 1 according to an embodiment of the present invention, where the circuit board 1 has a plurality of printed planes, the plurality of printed planes include a reflective plane 11 and one to a plurality of first planes 12, and the one to a plurality of first planes 12 are located on one side of the reflective plane 11; the outer-ring antenna 2 and one or more inner-ring antennas 3 are disposed on one or more first planes 12. Preferably, the plurality of printing planes further includes a second plane 13, and the second plane 13 is located on the other side of the reflection plane 11. As shown in fig. 2, the circuit board 1 generally includes four printed planes, and the utility model discloses the setting is that second plane 13, reflecting plane 11 and first plane 12 are stacked gradually, and the number of reflecting plane 11 is 1, and the number of first plane 12 is 2, and the number of second plane 13 is 1.
Referring to fig. 3, fig. 3 is a schematic view illustrating a coupling between an outer ring antenna 2 and an inner ring antenna 3 according to an embodiment of the present invention, where one or more of the inner ring antenna 3 and the outer ring antenna 2 form a coupling inductor. In this embodiment, the number of inner-ring antennas 3 is 4.
Preferably, the near field detection antenna further comprises an antenna circuit (not shown), the antenna circuit comprises a feeding device, the feeding device feeds an excitation signal to the outer-ring antenna, and the outer-ring antenna 2 is electrically connected to the feeding device. The antenna circuit further includes one or more comparison circuits, and the comparison circuits generally employ differential amplification circuits through which signals are captured. The comparison circuit has the following two embodiments:
in the first embodiment of the comparison circuit, the one to the plurality of comparison circuits are electrically connected to the one to the plurality of inner-ring antennas 3, respectively, and the other end of each comparison circuit may adopt a zero input, so that each inner-ring antenna 3 is compared with the zero input, respectively.
In the second embodiment of the comparison circuit, one to a plurality of the inner-ring antennas 3 are arranged in pairs to form one to a plurality of pairs of inner-ring antenna 3 groups, wherein two inner-ring antennas 3 in each pair of antenna groups are symmetrical around the center of a circle; the antenna circuit further comprises one to more comparison circuits; one or more of the comparison circuits are respectively and electrically connected with one or more than 3 groups of the inner ring antennas. That is, every two symmetrical inner-ring antennas 3 respectively form two input ends of a comparison circuit, so that two antennas are compared with each other.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an outer circle antenna 2 and an inner circle antenna 3 according to a first embodiment of the present invention, the embodiment corresponds to the perspective view shown in fig. 1, in this embodiment, each of the first planes 12 has a peripheral area, the outer circle antenna 2 is disposed in the peripheral area, one to a plurality of inner circle antennas 3 are disposed in the peripheral area, and the outer circle antenna 2 and one to a plurality of inner circle antennas 3 are disposed in the same first plane 12. As shown in the figure, the peripheral region is a circular ring, and the number of the inner-ring antennas 3 is 4, and the inner-ring antennas are uniformly and spirally arranged in the inner circle of the circular ring. Specifically, the inner circle is divided into four parts uniformly by the center of the circle, each part is equal to a quarter circle, and each inner-circle antenna 3 is spirally arranged in each quarter circle.
In fig. 4, each inner-ring antenna 3 includes an output port 31 and an inner-ring ground port 32, wherein the inner-ring ground ports 32 are overlapped and disposed at the center of the circle. The outer antenna 2 includes an excitation port 21 and an outer ground port 22. The inner antenna 3 is connected to an amplifying circuit through an output port 31, and the outer antenna 2 is connected to a feeding device through an excitation port 21 to obtain an excitation signal.
Since the number of the inner-ring antennas 3 in this embodiment is an even number, the comparison circuit may adopt the first and second embodiments of the comparison circuit.
Referring to fig. 5-6, fig. 5 is a perspective view of the structure of the outer ring antenna 2 and the inner ring antenna 3 provided by the second embodiment of the present invention, and fig. 6 is an exploded view of the outer ring antenna 2 and the inner ring antenna 3 provided by the second embodiment of the present invention. This embodiment differs from the first embodiment in that the outer loop antenna 2 and one or more of the inner loop antennas 3 are disposed in different first planes 12, respectively. Specifically, the outer loop antenna 2 is disposed on a first plane 12 close to the reflection plane 11, and the inner loop antenna 3 is disposed on the first plane 12 far from the reflection plane 11. Similarly, the number of the first planes 12 is 2, the peripheral area where the outer circle antenna 2 is arranged is a circular ring, and the number of the inner circle antennas 3 is 4, and the first planes are uniformly arranged in the outer circle of the circular ring, that is, the inner area is within the first plane. Since the number of the inner-ring antennas 3 in this embodiment is an even number, the comparison circuit may adopt the first embodiment of the comparison circuit.
In fig. 5-6, each inner-ring antenna 3 includes an output port 31 and an inner-ring ground port 32, wherein the inner-ring ground ports 32 are disposed in a manner of overlapping and being disposed at a center of a circle. The outer antenna 2 includes an excitation port 21 and an outer ground port 22, and the outer ground port 22 is also disposed at the center of the circle. Similarly, the inner antenna 3 is connected to the amplifying circuit through the output port 31, and the outer antenna 2 is connected to the feeding device through the excitation port 21 to obtain the excitation signal.
Referring to fig. 7, fig. 7 is a schematic structural diagram of an outer ring antenna 2 and an inner ring antenna 3 according to a third embodiment of the present invention, which is different from the first embodiment in that the number of inner rings is 2, the peripheral area of the outer ring antenna 2 is a circular ring, the inner circle is divided into two parts by the center of the circle, each part is equal to a half circle, and each inner ring antenna 3 is spirally disposed in each half circle. Since the number of the inner-ring antennas 3 in this embodiment is an even number, the comparison circuit may adopt the first and second embodiments of the comparison circuit.
Similarly, in fig. 7, each inner-ring antenna 3 includes an output port 31 and an inner-ring ground port 32, where the inner-ring ground ports 32 are overlapped and disposed at the center of the circle. The outer antenna 2 includes an excitation port 21 and an outer ground port 22. The inner antenna 3 is connected to an amplifying circuit through an output port 31, and the outer antenna 2 is connected to a feeding device through an excitation port 21 to obtain an excitation signal.
Referring to fig. 8, fig. 8 is a schematic structural diagram of an outer-ring antenna 2 and an inner-ring antenna 3 according to a fourth embodiment of the present invention; this embodiment is different from the first embodiment in that the number of inner circles is 3, the outer circumference area where the outer circle antenna 2 is disposed is a circular ring, the inner circle is divided into three parts uniformly from the center of the circle, each part is equal to one third of the circle, and each inner circle antenna 3 is spirally disposed in each one third of the circle. Since the number of the inner-ring antennas 3 in this embodiment is odd, the comparison circuit adopts the first embodiment of the comparison circuit.
Similarly, in fig. 8, each inner-ring antenna 3 includes an output port 31 and an inner-ring ground port 32, where the inner-ring ground ports 32 are overlapped and disposed at the center of the circle. The outer antenna 2 includes an excitation port 21 and an outer ground port 22. The inner antenna 3 is connected to an amplifying circuit through an output port 31, and the outer antenna 2 is connected to a feeding device through an excitation port 21 to obtain an excitation signal.
Referring to fig. 9, fig. 9 is a schematic structural diagram of an outer-ring antenna 2 and an inner-ring antenna 3 according to a fifth embodiment of the present invention, which is different from the fourth embodiment in that the number of inner rings is 2, a pattern formed by the outer-ring antenna 2 and the inner-ring antenna 3 is a 240 ° sector, an internal area where each inner-ring antenna 3 is located is a 120 ° sector, that is, each part is equal to one third of a circle in the fourth embodiment, and each inner-ring antenna 3 is spirally disposed in each one third of a circle. Since the number of the inner ring antennas 3 in this embodiment is even, but the inner ring antennas 3 are not symmetrical about the center of the circle, the comparison circuit adopts the first embodiment of the comparison circuit.
Similarly, in fig. 9, each inner-ring antenna 3 includes an output port 31 and an inner-ring ground port 32, where the inner-ring ground ports 32 are disposed in a superposed manner and at a center of the sector. The outer antenna 2 includes an excitation port 21 and an outer ground port 22. The inner antenna 3 is connected to an amplifying circuit through an output port 31, and the outer antenna 2 is connected to a feeding device through an excitation port 21 to obtain an excitation signal.
In summary, the reflective plane 11 exists in the sense that: 1. to some extent, the direction of the induction, which can be said to be reflection; 2. the GND plane adjacent to the antenna element can adjust the frequency characteristic of the antenna; 3. and isolating the mutual interference of the wiring and the element on the other plane and the antenna oscillator.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. A near-field detection antenna is characterized by comprising a circuit board, an outer ring antenna and one to more inner ring antennas;
the circuit board is provided with a plurality of printing planes, the printing planes comprise a reflecting plane and one to a plurality of first planes, and the one to a plurality of first planes are positioned on one side of the reflecting plane;
the outer ring antenna and the one or more inner ring antennas are arranged on the one or more first planes.
2. A near field probe antenna according to claim 1, wherein one or more of the inner loop antennas form a coupling inductance with the outer loop antenna.
3. A near field detection antenna according to claim 1 or 2, wherein each of the first planes has a peripheral region, the outer circle antenna is disposed in the peripheral region, and one to a plurality of the inner circle antennas are disposed in an inner region surrounded by the peripheral region or within the first plane.
4. A near field probe antenna according to claim 3, wherein the outer loop antenna and one or more of the inner loop antennas are disposed in the same first plane.
5. A near field probe antenna according to claim 3, wherein the outer loop antenna and one or more of the inner loop antennas are disposed in different first planes, respectively.
6. A near field probe antenna according to claim 3, wherein the number of the one or more inner antennas is N, the inner region is divided into N sections, and the N inner antennas are spirally disposed in the N sections, respectively.
7. The near field detection antenna of claim 1, further comprising an antenna circuit, the antenna circuit comprising a feed device, the outer loop antenna being electrically connected to the feed device.
8. The near field detection antenna of claim 7, wherein the antenna circuit further comprises one to more comparison circuits;
the one or more comparison circuits are respectively and electrically connected to the one or more inner ring antennas.
9. A near field probe antenna according to claim 7, wherein one or more of the inner coil antennas are arranged in pairs to form one to more pairs of inner coil antenna sets;
the antenna circuit further comprises one to more comparison circuits;
one or more of the comparison circuits are respectively and electrically connected with one or more pairs of the inner antenna groups.
10. A near field detection antenna according to any of claims 7 to 9, wherein the plurality of printed planes further comprises a second plane, the second plane being located on the other side of the reflection plane;
the antenna circuit is disposed on the second plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921004859.4U CN210074151U (en) | 2019-06-28 | 2019-06-28 | Near-field detection antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921004859.4U CN210074151U (en) | 2019-06-28 | 2019-06-28 | Near-field detection antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210074151U true CN210074151U (en) | 2020-02-14 |
Family
ID=69429399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921004859.4U Active CN210074151U (en) | 2019-06-28 | 2019-06-28 | Near-field detection antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210074151U (en) |
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2019
- 2019-06-28 CN CN201921004859.4U patent/CN210074151U/en active Active
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Address after: 518000 R & D building 901, block a, building 7, phase I, Wanke Yuncheng phase I, Xili community, Xili street, Nanshan District, Shenzhen City, Guangdong Province (9 / F, whole floor) Patentee after: SHENZHEN HAC TELECOM TECHNOLOGY Co.,Ltd. Address before: Xili Lake Road Shenzhen City, Guangdong province 518000 No. 4227 Nanshan District nine Xiang Ling new industrial district 2 Building 6 floor Patentee before: SHENZHEN HAC TELECOM TECHNOLOGY Co.,Ltd. |