CN219553899U

CN219553899U - Directional antenna with metal bracket

Info

Publication number: CN219553899U
Application number: CN202320531551.5U
Authority: CN
Inventors: 林嵩皓; 牛宝星; 刘伟
Original assignee: Shenzhen Electric Connector Technology Co Ltd
Current assignee: Shenzhen Electric Connector Technology Co Ltd
Priority date: 2023-03-18
Filing date: 2023-03-18
Publication date: 2023-08-18
Anticipated expiration: 2033-03-18

Abstract

The utility model discloses a metal bracket directional antenna, which comprises two groups of symmetrically arranged antenna units, a connecting bridge, a conductive floor and two microstrip units. Each group of antenna units comprises a first antenna array and a second antenna array which are symmetrically arranged, and the first antenna array is connected with the second antenna array through a first connecting sheet; the first antenna array is connected with the connecting bridge through a second connecting sheet, the second antenna array is connected with the connecting bridge through a third connecting sheet, the second connecting sheet is arranged in parallel with the third connecting sheet, and the antenna unit and the connecting bridge are formed by bending the same metal sheet; the microstrip units and the conductive floor are positioned on the same plane, and each microstrip unit is connected with the first antenna array closest to the microstrip units through the fourth connecting sheet. Compared with the prior art, the metal bracket directional antenna provided by the utility model has high radiation intensity in the directional radiation direction, and the radiation intensity in all directions in the directional radiation direction is almost the same, so that accurate positioning can be realized.

Description

Directional antenna with metal bracket

Technical Field

The utility model relates to the technical field of antennas in electronic communication, in particular to a metal bracket directional antenna.

Background

Antennas are of a wide variety for specific use in different frequencies, applications, situations, requirements, etc. The directional antenna (Directional antenna) is an antenna which is particularly strong in transmitting and receiving electromagnetic waves in one or a few specific directions, and is zero or very small in transmitting and receiving electromagnetic waves in other directions. The directional antenna can well solve the requirement that the equipment needs unidirectional high gain, and the directional antenna for inhibiting the backward signal can be adopted when one equipment causes potential interference to the rear equipment. Because of the limitations of the existing equipment, the directional antenna always sacrifices the radiation distance of the antenna at the same time when the directional antenna meets the directional radiation, so that the directional antenna can only play a role in a certain range, and cannot be positioned completely and accurately in relatively accurate use environments, such as remote control automobiles, aerial photo-taking devices and the like.

Therefore, there is a need for a directional antenna with high radiation intensity and high omni-directionality and accuracy of radiation in the directional radiation direction.

Disclosure of Invention

The embodiment of the utility model provides a metal bracket directional antenna, which has high radiation intensity in the directional radiation direction, almost the same radiation intensity in all directions in the directional radiation direction, and can realize accurate positioning, namely high omnidirectional and accuracy of radiation in the directional radiation direction.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a metal support directional antenna, includes two sets of symmetry set up antenna element, communicates two sets of connecting bridge, conductive floor and two microstrip units of antenna element, wherein:

each group of antenna units comprises a first antenna array and a second antenna array, the first antenna array and the second antenna array are symmetrically arranged, the first antenna array and the second antenna array are connected through a first connecting sheet, and the antenna units and the connecting bridge are formed by bending the same metal sheet;

the first antenna array is connected with the connecting bridge through a second connecting sheet, the second antenna array is connected with the connecting bridge through a third connecting sheet, and the second connecting sheet is arranged in parallel with the third connecting sheet;

the microstrip units and the conductive floor are located on the same plane, and each microstrip unit is connected with the nearest first antenna array through a fourth connecting sheet.

Preferably, the distance between the plane of the microstrip unit and the plane of the first antenna array is 1/2 lambda.

Preferably, the antenna unit further includes a radiation plate, the radiation plate is connected to the second antenna array, the radiation plate and the third connection piece are located on the same plane, and the radiation plate is connected to the connection bridge through the third connection piece.

Preferably, the size of the radiating plate is 1/4λ.

Preferably, the widths of the first antenna array and the second antenna array are 1/4 lambda.

Preferably, the connecting bridge is provided with a mounting hole for mounting and fixing the metal bracket directional antenna.

Preferably, the width of the fourth connecting sheet is 1-2mm.

Preferably, the conductive floor is provided with a U-shaped groove, and the microstrip unit is positioned in the U-shaped groove.

The utility model has the beneficial effects that: the two groups of antenna units are connected through a connecting bridge, the phase differences of the two groups of antenna units are mutually overlapped, the field intensity generated under the premise of unchanged total power is increased to 2 times of the original field intensity, so that the gain of the antenna is increased, the radiation concentration better completes directional output, the omnidirectionality in the directional direction is met, namely, the radiation intensities of the antennas in all directions on a forward signal are almost the same, the transmitting antennas can be captured, and the accurate positioning is realized; the antenna unit and the connecting bridge are formed by bending the same metal sheet, so that the forming process is simple and the production and the processing are convenient.

Drawings

Fig. 1 is a schematic structural diagram of a metal bracket directional antenna according to a first view angle in an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a metal bracket directional antenna according to a second view angle in an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a metal sheet before bending an antenna unit and a connecting bridge according to an embodiment of the present utility model;

fig. 4 is a return loss diagram of a metal-bracket directional antenna in an embodiment of the utility model;

fig. 5 is a standing wave ratio diagram of a metal bracket directional antenna according to an embodiment of the present utility model;

fig. 6 is a 2D radiation pattern at 6.48GHz for a metal-backed directional antenna in an embodiment of the utility model.

Reference numerals: 10. an antenna unit; 11. a first antenna array; 12. a second antenna array; 13. a first connecting piece; 14. a second connecting piece; 15. a third connecting piece; 16. a fourth connecting piece; 17. a radiation plate; 20. a connecting bridge; 21. a mounting hole; 30. a conductive floor; 31. a U-shaped groove; 40. microstrip unit.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the utility model, which is therefore not limited to the specific embodiments disclosed below.

The embodiment of the utility model provides the metal bracket directional antenna to solve the technical problem of low accuracy caused by low radiation distance of the directional antenna in the prior art.

As shown in fig. 1 to 3, an embodiment of the present utility model is:

a metal bracket directional antenna comprises two groups of symmetrically arranged antenna units 10, a connecting bridge 20 for communicating the two groups of antenna units 10, a conductive floor 30 and two microstrip units 40. Each group of antenna units 10 includes a first antenna element 11 and a second antenna element 12, where the first antenna element 11 and the second antenna element 12 are symmetrically arranged, and the first antenna element 11 and the second antenna element 12 are connected through a first connection piece 13. The first antenna array 11 is connected with the connecting bridge 20 through the second connecting sheet 14, the second antenna array 12 is connected with the connecting bridge 20 through the third connecting sheet 15, the second connecting sheet 14 is arranged in parallel with the third connecting sheet 15, and the antenna unit 10 and the connecting bridge 20 are formed by bending the same metal sheet. The microstrip unit 40 is located on the same plane as the conductive floor 30, and the microstrip unit 30 is connected to the first antenna element 11 nearest thereto through the fourth connection piece 16, and generally, the width of the fourth connection piece 16 is 1-2mm. Specifically, as shown in fig. 3, the second connecting piece 14 and the third connecting piece 15 are bent upward along the dotted line portion in the drawing to be parallel to each other, the first connecting piece 13 is bent upward along the dotted line to form a U shape, the first antenna element 11 and the second antenna element 12 are respectively bent in the opposite directions along the dotted line, the fourth connecting piece 16 is also bent along the dotted line portion, the portion connected to the first antenna element 11 is parallel to the first antenna element 11, the portion far from the first antenna element 11 is bent vertically downward, and the end is electrically connected to the microstrip unit 40.

In order to solve the technical problem of low accuracy caused by low radiation distance of a directional antenna in the prior art, the utility model connects two groups of antenna units with a connecting bridge respectively, and the phase differences of the two groups of antenna units are mutually overlapped, so that the field intensity generated on the premise of unchanged total power is increased to 2 times of the original field intensity, the gain of the antenna is increased, the radiation concentration better completes directional output, the omnidirectional output in the directional direction is satisfied, that is, the radiation intensity of the antennas in all directions on a forward signal is almost the same, the transmitting antennas can be captured, and the accurate positioning is realized; the antenna unit and the connecting bridge are formed by bending the same metal sheet, so that the forming process is simple and the production and the processing are convenient.

The two sets of antenna elements 10 comprise in total four antenna elements, namely two first antenna elements 11 and two second antenna elements 12, the length of which is inversely related to the centre point of the resonant frequency of the antenna, preferably the width of the first antenna elements 11 and the second antenna elements 12 is 1/4 lambda.

The distance between the plane of the microstrip unit 40 and the plane of the first antenna element 11 mainly affects the resonant depth of the resonant frequency at the center point, that is, the radiation intensity of the antenna, preferably, the distance between the plane of the microstrip unit 40 and the plane of the first antenna element 11 is 1/2λ, and specifically, the length of the portion of the fourth connecting piece 16 away from the first antenna element 11 and bent vertically downward is 1/2λ.

Preferably, the antenna unit 10 further comprises a radiating plate 17, the radiating plate 17 is connected to the second antenna element 12, the radiating plate 17 and the third connection piece 15 are located on the same plane, and the radiating plate 17 is connected to the connection bridge 20 through the third connection piece 15. More specifically, the size of the radiating plate 17 is 1/4λ×1/4λ, and the two radiating plates 17 are connected together by the connecting bridge 20, so that the phases of the two antenna units 10 are superimposed on each other, and the overall performance of the antenna in the direction of orientation is improved well. Meanwhile, the radiation efficiency of the two groups of antenna units 10 can be enhanced by superposition, and the gain direction is enhanced, so that the effect of accurate positioning can be realized.

Preferably, the connecting bridge 20 is provided with a mounting hole 21 for mounting and fixing the metal bracket directional antenna, so as to enhance the structural stability of the antenna. In general, the positions of the connection bridge 20 and the mounting hole 21 are determined by the mounting space, and are not specifically limited herein.

Preferably, the conductive floor 30 is provided with a U-shaped slot 31, and the microstrip unit 40 is located in the U-shaped slot 31 and surrounded by a metal plate, so that the directional performance is better compared with the general directional antenna.

In one embodiment of the present utility model, the lengths of the first antenna element 11 and the second antenna element 12 of the metal bracket directional antenna are 1/4λ, the dimensions of the radiating plate 17 are 1/4λ×1/4λ, the dimensions of the fourth connecting piece 16 in the vertical direction are 1/2λ, and the width is 2mm. As can be seen from the return loss diagram of the metal bracket directional antenna in FIG. 4, the return loss reaches-25 dB in the frequency band of 6.25GHz-6.75 GHz; as can be seen from the standing-wave ratio diagram of the metal bracket directional antenna in FIG. 5, the standing-wave ratio is between 2.0 at 6.25GHz-6.75GHz, and the standing-wave ratio is approximately 1.09 at the center frequency point of 6.48 GHz; as can be seen from the 2D radiation pattern of the metal bracket directional antenna at 6.48GHz in FIG. 6, the metal bracket directional antenna does not show petal shape, but shows a full apple shape, which shows that the intensity of the antenna in each radiation direction in the frequency band of 6.25GHz-6.45GHz is balanced, and the antenna gain can reach 7dBi. By utilizing the phase superposition principle, the two groups of antenna units 10 are connected through the connecting bridge 20, the problem that the radiation intensity of the existing directional antenna is unbalanced in the radiation direction is solved, the antenna gain is improved, the radiation intensity of the antenna in all directions on a forward signal is ensured to be almost the same, the transmitting antenna can be captured, and the accurate positioning is realized.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples merely illustrate embodiments of the utility model and are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides a metal support directional antenna which characterized in that, includes two sets of symmetry set up antenna element, communicates two sets of connecting bridge, conductive floor and two microstrip units of antenna element, wherein:

each group of antenna units comprises a first antenna array and a second antenna array, the first antenna array and the second antenna array are symmetrically arranged, and the first antenna array is connected with the second antenna array through a first connecting sheet;

the first antenna array is connected with the connecting bridge through a second connecting sheet, the second antenna array is connected with the connecting bridge through a third connecting sheet, the second connecting sheet and the third connecting sheet are arranged in parallel, and the antenna unit and the connecting bridge are formed by bending the same metal sheet;

2. The metal bracket directional antenna according to claim 1, wherein: the distance between the plane of the microstrip unit and the plane of the first antenna element is 1/2 lambda.

3. The metal bracket directional antenna according to claim 1, wherein: the antenna unit further comprises a radiation plate, the radiation plate is connected with the second antenna array, the radiation plate and the third connecting sheet are located on the same plane, and the radiation plate is connected with the connecting bridge through the third connecting sheet.

4. A metal bracket directional antenna according to claim 3, characterized in that: the size of the radiating plate is 1/4λ.

5. The metal bracket directional antenna according to claim 1, wherein: the widths of the first antenna array and the second antenna array are 1/4 lambda.

6. The metal bracket directional antenna according to claim 1, wherein: and the connecting bridge is provided with a mounting hole for mounting and fixing the metal bracket directional antenna.

7. The metal bracket directional antenna according to claim 1, wherein: the width of the fourth connecting sheet is 1-2mm.

8. The metal bracket directional antenna according to claim 1, wherein: the conductive floor is provided with a U-shaped groove, and the microstrip unit is positioned in the U-shaped groove.