CN211629304U

CN211629304U - Dipole antenna, dipole antenna assembly and dipole antenna array

Info

Publication number: CN211629304U
Application number: CN202020113211.7U
Authority: CN
Inventors: 尹作彪; 夏天琪; 张西洋
Original assignee: Qing Yanxun Technology Beijing Co ltd
Current assignee: Qing Yanxun Technology Beijing Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-10-02
Anticipated expiration: 2030-01-17

Abstract

The utility model discloses a dipole antenna, a dipole antenna assembly and a dipole antenna array, wherein the dipole antenna comprises a substrate; the first surface of the substrate is provided with a first dipole, the second surface of the substrate is provided with a second dipole, and the first surface is opposite to the second surface; the first dipole comprises a first straight arm and a first folding arm connected with one end of the first straight arm, and the other end of the first straight arm is provided with a grounding point connected with a grounding layer of an external circuit board; the second dipole comprises a second straight arm and a second folding arm connected with one end of the second straight arm, and a signal feed-in point connected with an external circuit board signal source is arranged at the other end of the second straight arm; the first folding arm and the second folding arm are in mirror symmetry. The first folding arm and the second folding arm of the dipole antenna are symmetrically arranged on two opposite surfaces of the substrate, so that the balance of the antenna can be guaranteed, the mutual interference of the two folding arms can be reduced, and the normal work of the dipole antenna is guaranteed.

Description

Dipole antenna, dipole antenna assembly and dipole antenna array

Technical Field

The utility model relates to a wireless communication technology field, in particular to dipole antenna, dipole antenna subassembly and dipole antenna array.

Background

With the rapid development of wireless communication, various communication products and technologies are rapidly developed according to the intense demands of people, and antennas are important elements of wireless communication. A dipole antenna is one type of antenna that is used to transmit and receive signals at a fixed frequency. The existing dipole antenna is a symmetrical structure arranged on the same side of a substrate, mutual interference between folding arms of the structure is large, and therefore normal work of the dipole antenna is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dipole antenna, dipole antenna subassembly and dipole antenna array to mutual interference between the folding arm of solving current dipole antenna is great, thereby influences the problem of dipole antenna's normal work.

In a first aspect, according to an embodiment of the present invention, there is provided a dipole antenna, including a substrate;

the first surface of the substrate is provided with a first dipole, the second surface of the substrate is provided with a second dipole, and the first surface is opposite to the second surface;

the first dipole comprises a first straight arm and a first folding arm connected with one end of the first straight arm, and the other end of the first straight arm is provided with a grounding point connected with a grounding layer of an external circuit board;

the second dipole comprises a second straight arm and a second folding arm connected with one end of the second straight arm, and a signal feed-in point connected with an external circuit board signal source is arranged at the other end of the second straight arm;

the first folding arm extends along the direction perpendicular to the length direction of the first straight arm, and the second folding arm extends along the direction perpendicular to the length direction of the second straight arm; and the first folding arm and the second folding arm are mirror-symmetrical.

Specifically, first folding arm with the folding arm of second all includes a plurality of head and the tail of connecting in order folding support arm, and adjacent two folding support arm forms the angle of buckling.

In particular, the angle of the bending angle is 90 °.

In particular, the first folded arm has a first polarization direction, which is the same as the extension direction of the first folded arm;

the second folding arm has a second polarization direction, which is the same as the extending direction of the second folding arm.

In particular, the first straight arm and the second straight arm at least partially coincide.

In a second aspect, according to an embodiment of the present invention, there is provided a dipole antenna assembly, including a base plate and two dipole antennas as described above;

the two dipole antennas are respectively a first dipole antenna and a second dipole antenna;

the base plates of the first dipole antenna and the second dipole antenna are vertically connected with the bottom plate, and an included angle larger than zero degree is formed between the base plate of the first dipole antenna and the base plate of the second dipole antenna;

the bottom plate is provided with a microstrip line used for being connected with an external circuit board, and the microstrip line is respectively connected with grounding points and signal feed points of the first dipole antenna and the second dipole antenna.

Specifically, an included angle formed between the substrate of the first dipole antenna and the substrate of the second dipole antenna is 90 °.

Specifically, the first straight arm of the first dipole antenna is different in length from the first straight arm of the second dipole antenna.

In a second aspect, according to an embodiment of the present invention, there is provided a dipole antenna array comprising a plurality of dipole antenna assemblies as described above.

Specifically, the array of the dipole antenna assemblies is square.

Specifically, the first dipole antenna and the second dipole antenna of the dipole antenna assembly of each row and each column of the array are alternately arranged.

In particular, the polarization direction of each dipole antenna assembly is different for each row and each column of the array.

Specifically, the array of the dipole antenna assemblies is circular.

In particular, a plurality of the dipole components form a crossed array.

The embodiment of the utility model provides a dipole antenna, dipole antenna subassembly and dipole antenna array, the setting of the first folding arm of this dipole antenna and the symmetry of the folding arm of second can guarantee the equilibrium of antenna on two surfaces that the base plate is relative, also can reduce the mutual interference of two folding arms, guarantees the normal work of dipole antenna.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a structural diagram of a dipole antenna according to an embodiment of the present invention;

FIG. 2 is a block diagram of a first dipole;

fig. 3 is a block diagram of a dipole antenna assembly according to an embodiment of the present invention;

fig. 4 is a diagram illustrating an arrangement of a dipole antenna array according to an embodiment of the present invention;

FIG. 5 is a perspective view of FIG. 4;

fig. 6 is a diagram illustrating an arrangement of a dipole antenna array according to another embodiment of the present invention;

fig. 7 is a diagram illustrating an arrangement of a dipole antenna array according to another embodiment of the present invention;

fig. 8 is a diagram of an application scenario of a prior art antenna.

The antenna comprises a substrate 1, a first surface 11, a second surface 12, a first dipole 2, a first straight arm 21, a first folded arm 22, a first folded arm 221, a first folded arm 222, a second folded arm 223, a third folded arm 224, a fourth folded arm 225, a fifth folded arm 226, a sixth folded arm 227, a seventh folded arm 227, a second dipole 3, a second straight arm 31, a second folded arm 32, a grounding point 4, a signal feed point 5, a bottom plate 6, a first dipole antenna 7, a second dipole antenna 8, a reinforcing welding point 9 and a microstrip line 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In a first aspect, as shown in fig. 1, according to an embodiment of the present invention, there is provided a dipole antenna, including a substrate 1; the first surface 11 of the substrate 1 is provided with a first dipole 2, the second surface 12 of the substrate 1 is provided with a second dipole 3, and the first surface 11 and the second surface 12 are opposite; the first dipole 2 comprises a first straight arm 21 and a first folding arm 22 connected with one end of the first straight arm 21, and the other end of the first straight arm 21 is provided with a grounding point 4 connected with the grounding layer of the external circuit board; the second dipole 3 comprises a second straight arm 31 and a second folding arm 32 connected with one end of the second straight arm 31, and the other end of the second straight arm 31 is provided with a signal feed-in point 5 connected with an external circuit board signal source; the first folding arm 22 extends in a direction perpendicular to the longitudinal direction of the first straight arm 21, and the second folding arm 32 extends in a direction perpendicular to the longitudinal direction of the second straight arm 31; and the first folding arm 22 is mirror symmetric to the second folding arm 32.

The substrate 1 may be a printed circuit board made of bismaleimide triazine resin or glass fiber reinforced oxygen resin, or a flexible sheet substrate made of polyimide, or even integrated with a part of a circuit to reduce occupied space. The first dipole 2 and the second dipole 3 can be made of conductive material such as silver, aluminum, iron, zinc or metal alloy, preferably conductive material with low loss such as copper or silver surface, but it can also be made of non-metal such as graphite, composite plastic material formed by adding conductive substance, etc., and the embodiment is not limited.

The present embodiment provides a dipole antenna, in which the ends of the first folding arm 22 and the second folding arm 32 are open, and the open end structure provides a large space for impedance adjustment, especially for input impedance, which can be determined by adjusting the geometric parameters of the first folding arm 22 and the second folding arm 32.

The dipole antenna can operate at multiple center frequency points. In some embodiments, different center frequency points may be reached by setting the geometric parameters of the first straight arm 21, the first folded arm 22, the second straight arm 31, and the second folded arm 32. For example, the dipole antenna can be operated at the center frequency point of 2.4GHz by setting the geometric parameters of the first straight arm 21, the first folded arm 22, the second straight arm 31 and the second folded arm 32, so as to be applied to positioning based on bluetooth AOA (Angle-of-Arrival). And the first folding arm 22 and the second folding arm 32 are mirror-symmetrical to form a symmetrical structure, so that the current balance on the dipole antenna is ensured, the performance of the antenna is improved, and meanwhile, the first folding arm 22 and the second folding arm 32 are distributed on different surfaces, so that the interference between the first folding arm 22 and the second folding arm 32 is reduced, and the normal work of the dipole antenna is ensured.

In the above embodiment, as shown in fig. 2, each of the first folding arm 22 and the second folding arm 32 includes a plurality of folding arms connected end to end in sequence, and two adjacent folding arms form a bending angle.

Folding support arm is buckled each other and is connected, can increase the total length of folding arm to compare with the straight arm of the level of same length, can reduce the size of this direction again, thereby reduce first dipole 2 and second dipole 3's size, and then reduce dipole antenna's volume, reduce weight, be convenient for integrate and constitute the array, satisfy the demand that the electronic product miniaturization used.

For a particular application, the angle of the bending angle is 90 °. The first folding arm 22 and the second folding arm include 7 folding support arms, which are respectively the first folding support arm 221 to the seventh folding support arm 227, wherein the first folding support arm 221, the third folding support arm 223, the fifth folding support arm 225 and the seventh folding support arm 227 are parallel to each other, the second folding support arm 222, the fourth folding support arm 224 and the sixth folding support arm 226 are parallel to each other, and the parallel arrangement structure facilitates etching of the first folding arm 22 and the second folding arm 32.

In the above-described embodiment, the first folding arm 22 has the first polarization direction, which is the same as the extending direction of the first folding arm 22221; the second folding arm 32 has a second polarization direction, which is the same as the extending direction of the second folding arm 32.

The first polarization direction is set to be the same as the extending direction of the first folding arm 22, the second polarization direction is set to be the same as the extending direction of the second folding arm 32, and the first folding arm 22 and the second folding arm 32 are mirror-symmetrical, so that the first polarization direction is opposite to the second polarization direction, the interference between the two folding arms can be further reduced, and the normal operation of the dipole antenna can be ensured.

In the above embodiment, the first straight arm 21 and the second straight arm 31 at least partially coincide to further reduce the volume of the dipole antenna.

In a second aspect, according to an embodiment of the present invention, as shown in fig. 3, there is provided a dipole antenna assembly comprising a base plate 6 and two of the above-mentioned dipole antennas; the two dipole antennas are respectively a first dipole antenna 7 and a second dipole antenna 8; the base plates 1 of the first dipole antenna 7 and the second dipole antenna 8 are vertically connected with the bottom plate 6, and an included angle larger than zero degree is formed between the base plate 1 of the first dipole antenna 7 and the base plate 1 of the second dipole antenna 8; the bottom plate 6 is provided with a microstrip line 10 used for being connected with an external circuit board, and the microstrip line 10 is respectively connected with the grounding point 4 and the signal feed-in point 5 of the first dipole antenna 7 and the second dipole antenna 8.

The bottom plate 6 is made of an insulating material, and other radio frequency circuits connected with the microstrip line 10 can be further arranged on the bottom plate 6, so that the microstrip line 10 and the other radio frequency circuits can be conveniently connected and wired, the radio frequency circuits are prevented from occupying extra space, and the volume of the communication equipment is reduced. A plurality of reinforcing welding spots 9 are added at the joint of the substrate 1 of the first dipole antenna 7 and the bottom plate 6 and at the joint of the substrate 1 of the second dipole antenna 8 and the bottom plate 6 so as to enhance the stability and reliability of the connection. And the edge of the substrate 1 of the first dipole antenna 7 and the edge of the substrate 1 of the second dipole antenna 8 can also be provided with a plurality of reinforcing welding points 9, so that the first dipole antenna 7 and the second dipole antenna 8 are not subjected to relative displacement integrally, and the phenomenon that the work of the dipole antenna assembly is influenced by the relative displacement between the first dipole antenna 7 and the second dipole antenna 8 is avoided.

In the present embodiment, the first dipole antenna 7 and the second dipole antenna 8 form an angle greater than zero degree, so that the first folded arm 22 and the second folded arm 32 of the first dipole 2 and the second folded arm 22 and the second folded arm 32 of the second dipole 3 have four different polarization directions on a plane perpendicular to the straight arm, and the first folded arm 22 and the second folded arm 32 are away from the installation plane by the straight arm, compared with the prior art, as shown in fig. 8, in which the antenna plane and the installation plane are located on the same plane and only can receive signals with an angle θ smaller than 90 ° with respect to the plane, the first folded arm 22 and the second folded arm 32 can receive signals with any angle with respect to the plane where the first folded arm 22 or the second folded arm 32 is located, so that the sensitivity of receiving signal angle is reduced, and omnidirectional receiving is realized.

In the above embodiment, the included angle formed between the substrate 1 of the first dipole antenna 7 and the substrate 1 of the second dipole antenna 8 is 90 °, so as to improve the structural strength and reliability between the substrate 1 and the bottom plate 6.

In the above embodiment, as shown in fig. 3, the lengths of the first straight arm 21 of the first dipole antenna 7 and the first straight arm 21 of the second dipole antenna 8 are different, so that the plane in which the first folded arm 22 and the second folded arm 32 of the first dipole antenna 7 are located and the plane in which the first folded arm 22 and the second folded arm 32 of the second dipole antenna 8 are located are different, and mutual interference between the first dipole antenna 7 and the second dipole antenna 8 is reduced.

In a second aspect, according to embodiments of the present invention, as shown in fig. 4 to 7, there is provided a dipole antenna array comprising a plurality of dipole antenna assemblies as described above.

In particular, the dipole antenna array may take a variety of arrangements. As shown in fig. 4 and 5, the first dipole antenna array is arranged in a manner that an array formed by a plurality of dipole antenna elements is square. The square array can be a square array or a rectangular array. Each row and each column of the square array contains the same number of dipole antenna elements and each row and each column of the rectangular array contains a different number of dipole antenna elements. For a square array, the centers of the dipole antenna elements in each row lie on a same straight line, which is defined as a first straight line, the centers of the dipole antenna elements in each column lie on another straight line, which is defined as a second straight line, and each row and each column of the square array are at an angle of 90 °, i.e., the first straight line is at an angle of 90 ° to the second straight line. And the spacing between any two adjacent dipole antenna components can be different or the same, or can be partially different or partially the same. Preferably, the first pitch of the rows may be the same as the first pitch of the rows, the second pitch of the columns may be the same as the second pitch of the columns, and the first pitch and the second pitch may be the same or different. Wherein in some embodiments the first dipole antenna 7 and the second dipole antenna 8 of the dipole antenna assembly of each row and each column of the array are arranged alternately to reduce mutual interference of two adjacent dipole antenna assemblies. In other embodiments, the polarization directions of the dipole antenna elements in each row and each column of the array are different, so that omni-directional reception is achieved.

As shown in fig. 6, the second dipole antenna array is arranged in a manner that an array formed by a plurality of dipole antenna assemblies is circular, that is, centers of the dipole antenna assemblies are on the same circumference, and distances between any two adjacent dipole antenna assemblies may be different, may also be the same, may also be partially different, and is partially the same.

As shown in fig. 7, the third dipole antenna array is arranged in a cross array formed by a plurality of dipole elements, that is, the connection line of the centers of the dipole antenna elements is an oblique line, and the oblique line is parallel to or coincident with the diagonal line of the shape formed by the dipole antennas at the outer edge of the array.

The first straight arm 21 of the first dipole antenna 7 and the first straight arm 21 of the second dipole antenna 8 of each dipole antenna component are different in length, so that a tall and short dipole antenna combination is formed, the first dipole antenna 7 and the second dipole antenna can be directly etched on a PCB (printed circuit board), and therefore the dipole antenna component can be formed by directly assembling the PCB, and the antenna is convenient to produce and assemble. According to the technical solution provided by the utility model, the embodiment of the utility model provides a dipole antenna, dipole antenna subassembly and dipole antenna array, the setting of the first folding arm 22 of this dipole antenna and the folding arm 32 symmetry of second can guarantee the equilibrium of antenna on two surfaces that the base plate 1 is relative, also can reduce the mutual interference of two folding arms, guarantees the normal work of dipole antenna.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A dipole antenna, characterized in that it comprises a substrate (1);

the first surface (11) of the substrate (1) is provided with a first dipole (2), the second surface (12) of the substrate (1) is provided with a second dipole (3), and the first surface (11) and the second surface (12) are opposite;

the first dipole (2) comprises a first straight arm (21) and a first folding arm (22) connected with one end of the first straight arm (21), and the other end of the first straight arm (21) is provided with a grounding point (4) connected with a grounding layer of an external circuit board;

the second dipole (3) comprises a second straight arm (31) and a second folding arm (32) connected with one end of the second straight arm (31), and a signal feed-in point (5) connected with an external circuit board signal source is arranged at the other end of the second straight arm (32);

the first folding arm (22) extends along a direction perpendicular to the length direction of the first straight arm (21), and the second folding arm (32) extends along a direction perpendicular to the length direction of the second straight arm (31); and the first folding arm (22) and the second folding arm (32) are mirror-symmetrical.

2. A dipole antenna according to claim 1, wherein said first folded arm (22) and said second folded arm (32) each comprise a plurality of folded arms connected end to end in series, and adjacent ones of said folded arms form a bend angle.

3. A dipole antenna as recited in claim 2, wherein the bend angle is 90 °.

4. Dipole antenna according to claim 1, characterized in that said first folded arm (22) has a first polarization direction, which is the same as the extension direction of said first folded arm (22);

the second folding arm (32) has a second polarization direction which is the same as the extension direction of the second folding arm (32).

5. A dipole antenna according to claim 1, characterized in that said first straight arm (21) and said second straight arm (31) are at least partially coincident.

6. A dipole antenna assembly, characterized by comprising a base plate (6) and two dipole antennas according to any of claims 1-4;

the two dipole antennas are respectively a first dipole antenna (7) and a second dipole antenna (8);

the base plates (1) of the first dipole antenna (7) and the second dipole antenna (8) are vertically connected with the bottom plate (6), and an included angle larger than zero degree is formed between the base plate (1) of the first dipole antenna (7) and the base plate (1) of the second dipole antenna (8);

the bottom plate (6) is provided with a microstrip line (10) used for being connected with an external circuit board, and the microstrip line (10) is respectively connected with grounding points (4) and signal feed points (5) of the first dipole antenna (7) and the second dipole antenna (8).

7. A dipole antenna assembly according to claim 6, characterized in that the angle formed between the substrate (1) of the first dipole antenna (7) and the substrate (1) of the second dipole antenna (8) is 90 °.

8. A dipole antenna assembly according to claim 6, characterized in that the first straight arm (21) of the first dipole antenna (7) and the first straight arm (21) of the second dipole antenna (8) are different in length.

9. A dipole antenna array comprising a plurality of dipole antenna assemblies as claimed in claims 6 to 8.

10. A dipole antenna array according to claim 9 and wherein a plurality of said dipole antenna assemblies form a square array.

11. A dipole antenna array according to claim 10, wherein the first (7) and second (8) dipole antennas of the dipole antenna assembly of each row and each column of the array are arranged alternately.

12. A dipole antenna array according to claim 10 and wherein the polarization directions of the dipole antenna elements of each row and each column of said array are different.

13. A dipole antenna array according to claim 9 and wherein said array of dipole antenna elements is circular.

14. A dipole antenna array as recited in claim 9, wherein a plurality of said dipole elements form a crossed array.