CN219067213U

CN219067213U - Sub-1GHz three-frequency-band antenna

Info

Publication number: CN219067213U
Application number: CN202223001018.2U
Authority: CN
Inventors: 肖遥; 池静然; 郭晓娟
Original assignee: Sunway Communication Beijing Co Ltd
Current assignee: Sunway Communication Beijing Co Ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-05-23
Anticipated expiration: 2032-11-10

Abstract

The utility model discloses a Sub-1GHz three-frequency-band antenna, which comprises a main board and a dielectric board, wherein the dielectric board is provided with a first branch part, a second branch part, a main branch, a feeder and a short circuit matching branch; one end of the main branch is connected with and communicated with the first branch part, and the other end is connected with and communicated with the second branch part; the first branch part comprises a plurality of parallel first front branches arranged on the front surface of the medium plate and a plurality of parallel first back branches arranged on the back surface of the medium plate, and the plurality of first front branches are connected with the plurality of first back branches in a staggered manner; the second branch part comprises a plurality of parallel second front branches arranged on the front surface of the medium plate and a plurality of parallel second back branches arranged on the back surface of the medium plate, and the plurality of second front branches are connected with the plurality of second back branches in a staggered manner. The Sub-1GHz antenna occupies a small space and can realize three-frequency-band coverage.

Description

Sub-1GHz three-frequency-band antenna

Technical Field

The utility model relates to the technical field of antennas, in particular to a Sub-1GHz three-frequency-band antenna.

Background

Along with the continuous development of mobile communication technology, the demands of the vehicle-mounted internet of things and wireless communication functions on automobiles are increased, and the number of corresponding antennas is increased, so that higher demands are put on miniaturization and multifrequency of the antennas.

Most of the existing Sub-1GHz antennas use a glue stick antenna, a spring antenna or a PCB antenna. The glue stick antenna and the spring antenna occupy large space and cannot be integrated in the antenna module box body, and the glue stick antenna and the spring antenna have single frequency and cannot realize multiple frequency bands; currently, sub-1GHz antennas adopting PCB schemes cannot cover the 312MHz-315MHz operating frequency band and cannot realize multiple frequency bands.

Disclosure of Invention

The utility model aims to solve the technical problems that: the Sub-1GHz three-frequency-band antenna with small occupied space is provided.

In order to solve the technical problems, the utility model adopts the following technical scheme: the Sub-1GHz three-frequency-band antenna comprises a main board and a dielectric board, wherein a first branch part, a second branch part, a main branch, a feeder and a short circuit matching branch are arranged on the dielectric board, the feeder is connected and communicated with the main branch and the main board, a stratum is arranged on the main board, and the short circuit matching branch is connected and communicated with the main branch and the stratum; one end of the main branch is connected with and communicated with the first branch part, and the other end is connected with and communicated with the second branch part; the first branch part comprises a plurality of parallel first front branches arranged on the front surface of the medium plate and a plurality of parallel first back branches arranged on the back surface of the medium plate, and the plurality of first front branches are connected with the plurality of first back branches in a staggered manner; the second branch part comprises a plurality of parallel second front branches arranged on the front surface of the medium plate and a plurality of parallel second back branches arranged on the back surface of the medium plate, and the plurality of second front branches are connected with the plurality of second back branches in a staggered manner.

Further, the distance between any two adjacent first front side branches is equal, the distance between any two adjacent second front side branches is equal, and the distance between two adjacent first front side branches is equal to the distance between two adjacent second front side branches.

Further, the first front side branch is perpendicular to the main board, and the first back side branch is inclined relative to the main board.

Further, the second front side branch is perpendicular to the main board, and the second back side branch is inclined relative to the main board.

Further, the number of the first front side branches is the same as or different from the number of the second front side branches.

Further, the dielectric plate is arranged perpendicular to the main plate.

Further, the dielectric plate is provided with a conducting hole, and the first front branch and the first back branch are connected and conducted through the conducting hole.

Further, the width of the first front side branch is equal to the width of the first back side branch.

Further, the portable electronic device further comprises a base and a shell, wherein the base is connected with the shell to form an accommodating space, and the main board and the dielectric board are arranged in the accommodating space.

Further, the device also comprises a rubber seat, wherein the rubber seat is connected with the base.

The utility model has the beneficial effects that: the Sub-1GHz three-frequency-band antenna is realized in the form of a PCB, occupies small space and has low production and manufacturing cost; the antenna branches are distributed on two sides of the dielectric plate and connected and conducted, so that the coupling problem among the antenna branches is improved on the basis of effectively increasing the physical length of the antenna, and finally, the antenna can cover three working frequency bands of Sub-1GHz (312 MHz-315MHz, 432.18MHz-435.66MHz and 902MHz-928 MHz); good antenna standing wave performance can be realized without using a matching circuit; the antenna can be integrated in the vehicle-mounted antenna module, has outstanding practicability, and is worthy of popularization and application.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a Sub-1GHz three-band antenna according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a dielectric plate in a Sub-1GHz three-band antenna according to the first embodiment of the present utility model;

fig. 3 is a schematic structural diagram of an antenna circuit on a dielectric plate in a Sub-1GHz three-band antenna according to the first embodiment of the present utility model;

fig. 4 is an S-parameter graph of a Sub-1GHz three-band antenna according to the first embodiment;

fig. 5 is a graph showing efficiency of the Sub-1GHz three-band antenna of the first embodiment.

Reference numerals illustrate:

1. a main board;

2. a dielectric plate; 21. a main branch; 22. a feeder line; 23. short circuit matching branches; 24. a first front side branch; 25. a first backside stub; 26. a second front branch; 27. a second backside stub; 28. a guide through hole;

3. a base;

4. a housing;

5. and a rubber seat.

Detailed Description

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications such as up, down, left, right, front, and rear … … are referred to, and the directional indication is merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture such as that shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In addition, if the meaning of "and/or" is presented throughout this document to include three parallel schemes, taking "and/or" as an example, including a scheme, or a scheme that is satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Example 1

Referring to fig. 1 to 5, a first embodiment of the present utility model is as follows: the Sub-1GHz three-frequency-band antenna can cover three working frequency bands of Sub-1GHz (312 MHz-315MHz, 432.18MHz-435.66MHz and 902MHz-928 MHz), and is particularly suitable for vehicle-mounted Internet of things systems.

Referring to fig. 1 to 3, the Sub-1GHz three-band antenna includes a main board 1 and a dielectric board 2, the dielectric board 2 is disposed perpendicular to the main board 1, the dielectric board 2 is located above the main board 1, an antenna line is disposed on the dielectric board 2, the antenna line includes a first branch portion, a second branch portion, a main branch 21, a feeder line 22 and a short circuit matching branch 23, and the feeder line 22 connects and conducts a feeder line on the main board 1 and the main branch 21; a stratum is arranged on the main board 1, and the short circuit matching branch 23 is connected with and communicated with the main branch 21 and the stratum; one end of the main branch 21 is connected with and conducts the first branch part, and the other end is connected with and conducts the second branch part; the first branch part comprises a plurality of parallel first front branches 24 arranged on the front surface of the medium plate 2 and a plurality of parallel first back branches 25 arranged on the back surface of the medium plate 2, and the plurality of first front branches 24 are connected with the plurality of first back branches 25 in a staggered way; the second branch part comprises a plurality of parallel second front branches 26 arranged on the front surface of the medium plate 2 and a plurality of parallel second back branches 27 arranged on the back surface of the medium plate 2, and the plurality of second front branches 26 are connected with the plurality of second back branches 27 in a staggered way. The dielectric board 2 may be an FR4 substrate board.

The Sub-1GHz three-frequency-band antenna further comprises a base 3 and a shell 4, wherein the base 3 is connected with the shell 4 to form an accommodating space, and the main board 1 and the dielectric board 2 are arranged in the accommodating space. In this embodiment, the maximum size of the overall profile of the Sub-1GHz three-band antenna is 163mm by 70mm by 92mm; the main board 1 is a PCB board, and the thickness of the main board 1 is 1.6mm.

Optionally, the Sub-1GHz three-band antenna further comprises a rubber seat 5, and the rubber seat 5 is connected with the base 3. The existence of the rubber seat 5 can prevent the Sub-1GHz three-frequency band antenna from damaging the vehicle when being installed on the vehicle, and meanwhile, the rubber seat 5 can also play a role in sealing to prevent water vapor and dust from entering the accommodating space.

In this embodiment, the main branch 21, the feeder 22, and the short circuit matching branch 23 are all disposed on the front surface of the dielectric plate 2; the main branch 21 is parallel to the main board 1, and the main branch 21 is located below the first front branch 24 and the second front branch 26.

Preferably, the first front branch 24 is disposed perpendicular to the main board 1, and the first back branch 25 is disposed obliquely with respect to the main board 1; the second front branch 26 is disposed perpendicular to the main board 1, and the second back branch 27 is disposed obliquely with respect to the main board 1.

The distance between any two adjacent first front branches 24 is equal, the distance between any two adjacent second front branches 26 is equal, and the distance between two adjacent first front branches 24 is equal to the distance between two adjacent second front branches 26; the distance between any two adjacent first back branches 25 is equal, the distance between any two adjacent second back branches 27 is equal, and the distance between two adjacent first back branches 25 is equal to the distance between two adjacent second back branches 27; the width of the first front side branch 24 is equal to the width of the first back side branch 25, the width of the second front side branch 26 is equal to the width of the second back side branch 27, and in this embodiment, the width of the first front side branch 24 is equal to the width of the second front side branch 26.

The number of first front side branches 24 is the same as or different from the number of second front side branches 26. In this embodiment, the number of the first front branches 24 and the number of the first back branches 25 are 5, and the number of the second front branches 26 and the number of the second back branches 27 are 7. The number of the first front-side branches 24, the number of the first rear-side branches 25, the number of the second front-side branches 26, and the number of the second rear-side branches 27 may be set as needed.

Preferably, the first front side branch 24 distant from the second branch portion is disposed along an edge of one end of the dielectric plate 2; the second front side branch 26, which is distant from the first branch portion, is provided along the edge of the other end of the dielectric plate 2.

Specifically, the dielectric plate 2 is provided with a conducting hole 28, and the first front branch 24 and the first back branch 25 are connected and conducted through the conducting hole 28; the second front branch 26 and the second back branch 27 are connected and conducted through the conducting via hole 28. The via hole 28 is a metallized hole, or a via hole filled with conductive paste or conductive column is filled in the via hole 28.

In this embodiment, the dimensions of the dielectric plate 2 are 62mm by 46mm by 1mm; the width of the first front branch 24 is 1mm; the distance between two adjacent first front branches 24 is 3.15mm; the length of the first front side branch 24 is equal to the length of the second front side branch 26, and the length of the first front side branch 24 is 32mm; the diameter of the via hole 28 is 1mm; the distance between the main branch 21 and the first front branch 24 is 4.6mm; the distance between the main branch 21 and the main board 1 is 6.5mm; the width of the main branch 21 is 1.5mm; the length of the main branch 21 is 60mm; the width of the feeder 22 is 2mm; the spacing between the feeder 22 and the short circuit matching stub 23 is 12.5mm; the width of the short circuit matching branch 23 is 2mm; the distance from the short-circuit matching stub 23 to the end of the dielectric plate 2 to which it is close is 14.5mm. By adjusting the distance between two adjacent first front branches 24, the Sub-1GHz antenna can cover three working frequency bands of 312MHz-315MHz, 432.18MHz-435.66MHz and 902MHz-928MHz simultaneously.

Fig. 4 is an S-parameter graph of the Sub-1GHz three-band antenna of the embodiment, and it can be seen from the graph that 312MHz-315MHz, 432.18MHz-435.66MHz, 902MHz-928MHz are all below the reference level-6 dB, which meets the design requirement. Namely, the Sub-1GHz three-frequency-band antenna of the embodiment can well cover three working frequency bands of 312MHz-315MHz, 432.18MHz-435.66MHz and 902MHz-928 MHz).

Fig. 5 is an efficiency graph of the Sub-1GHz three-band antenna of the embodiment, and it can be seen from the graph that the efficiency of 312MHz-315MHz is about-9 dB, the efficiency of 432.18MHz-435.66MHz, and the efficiency of 902MHz-928MHz are-1 to-2.5 dB, so that the use requirement can be satisfied.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

Sub-1GHz three frequency channel antenna, including mainboard and dielectric plate, its characterized in that: the medium plate is provided with a first branch part, a second branch part, a main branch, a feeder and a short circuit matching branch, the feeder is connected and communicated with the main branch and the main board, the main board is provided with a stratum, and the short circuit matching branch is connected and communicated with the main branch and the stratum; one end of the main branch is connected with and communicated with the first branch part, and the other end is connected with and communicated with the second branch part; the first branch part comprises a plurality of parallel first front branches arranged on the front surface of the medium plate and a plurality of parallel first back branches arranged on the back surface of the medium plate, and the plurality of first front branches are connected with the plurality of first back branches in a staggered manner; the second branch part comprises a plurality of parallel second front branches arranged on the front surface of the medium plate and a plurality of parallel second back branches arranged on the back surface of the medium plate, and the plurality of second front branches are connected with the plurality of second back branches in a staggered manner.
2. The Sub-1GHz three-band antenna of claim 1, wherein: the distance between any two adjacent first front branches is equal, the distance between any two adjacent second front branches is equal, and the distance between two adjacent first front branches is equal to the distance between two adjacent second front branches.
3. The Sub-1GHz three-band antenna of claim 1, wherein: the first front branch is perpendicular to the main board, and the first back branch is inclined relative to the main board.
4. The Sub-1GHz three-band antenna of claim 1, wherein: the second front branch is perpendicular to the main board, and the second back branch is inclined relative to the main board.
5. The Sub-1GHz three-band antenna of claim 1, wherein: the number of the first front side branches is the same as or different from the number of the second front side branches.
6. The Sub-1GHz three-band antenna of claim 1, wherein: the dielectric plate is perpendicular to the main board.
7. The Sub-1GHz three-band antenna of claim 1, wherein: the dielectric plate is provided with a guide through hole, and the first front branch and the first back branch are connected and conducted through the guide through hole.
8. The Sub-1GHz three-band antenna of claim 1, wherein: the width of the first front side branch is equal to the width of the first back side branch.
9. The Sub-1GHz three-band antenna of claim 1, wherein: the novel portable computer further comprises a base and a shell, wherein the base is connected with the shell to form an accommodating space, and the main board and the dielectric board are arranged in the accommodating space.
10. The Sub-1GHz three-band antenna of claim 9, wherein: the novel rubber seat is characterized by further comprising a rubber seat, and the rubber seat is connected with the base.