Small 4G cellular wireless communication camera antenna

Abstract

The utility model provides a miniature 4G cellular wireless communication camera antenna, which comprises a feed part and a grounding part, the grounding part comprises an antenna ground branch, and the feed part comprises a first low-frequency branch, a high-frequency branch and a second low-frequency branch; the first low-frequency branch is a linear branch, the second low-frequency branch is a C-shaped branch, the high-frequency branch is connected with the middle of the first low-frequency branch, the second low-frequency branch surrounds the high-frequency branch and is connected with the first low-frequency branch, and the antenna ground branch is an L-shaped branch. The antenna adopts a flexible printed circuit FPC, and the structure of the antenna is arranged on the FPC. A coaxial line is welded at a feed point of the antenna by using a first-generation ipex head. The camera provided by the utility model has wide communication bandwidth and good antenna performance, and the antenna is designed at the position of the camera base, so that a better antenna environment and an assembly environment can be obtained, and the product characteristics of convenience in assembly, excellent performance, stability and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular to a small 4G cellular wireless communication camera antenna. Background Art

[0002] In recent years, smart products have been developing and evolving, and more and more practical application scenarios have emerged, such as home WIFI communication cameras, traffic wireless cameras, and security wireless cameras. At the same time, for some places where WIFI networks cannot cover, there is a demand for wireless communication cameras with 4G cellular networks. Because such cameras include cellular communication frequency bands, and in order to take into account the major operators, their communication frequency bands often need to take into account the low frequency 824-960MHz and the medium and high frequency 1710-2690MHz. Their working bandwidth range is relatively wide, and they require antenna products with better performance to be compatible with the design.

[0003] Rich connection and communication functions, diversified and personalized product appearance, require continuous breakthroughs in miniaturized antenna technology. Taking wireless camera products as an example, they have developed from not supporting communication connection functions to supporting WIFI, and from only WIFI to supporting 4G cellular networks. The requirements for antenna performance are getting higher and higher. In order to meet the design requirements of such products, 4G cellular wireless communication antennas suitable for such products have also come into being. At the same time, in order to obtain better, more stable and easier to assemble antenna designs, it is also necessary to update and iterate with the products.

[0004] Conventional 4G cellular network antenna designs generally use spring clips attached to the motherboard, and the antenna is attached to the bracket or the inner surface of the shell. However, for products such as cameras, the stability and reliability of this type of design are low, and it may cause damage to the antenna or unstable performance during the user's use of the product, resulting in poor communication effects.

[0005] Therefore, there is an urgent need for a small 4G cellular wireless communication camera antenna to solve the current industry problems to a large extent. Utility Model Content

[0006] In view of the problems existing in the prior art, the utility model designs a small 4G cellular wireless communication camera antenna.

[0007] The utility model is specifically implemented through the following technical solutions:

[0008] A small 4G cellular wireless communication camera antenna comprises a feeding part and a grounding part, the grounding part comprises an antenna ground branch, the feeding part comprises a first low-frequency branch, a high-frequency branch and a second low-frequency branch; the first low-frequency branch is a straight branch, the second low-frequency branch is a C-shaped branch, the high-frequency branch is connected to the middle of the first low-frequency branch, the second low-frequency branch surrounds the high-frequency branch, and the second low-frequency branch is connected to the first low-frequency branch, and the antenna ground branch is an L-shaped branch; there is a first low-frequency and ground coupling gap between the first low-frequency branch and the antenna ground branch, with a spacing of 1.2mm; there is a second low-frequency and ground coupling gap between the second low-frequency branch and the antenna ground branch, with a spacing of 1.4mm; there is a first low-high-frequency coupling gap between the first low-frequency branch and the high-frequency branch 7, with a spacing of 1.0mm; there is a second low-high-frequency coupling gap between the second low-frequency branch and the high-frequency branch, with a spacing of 1.4mm; there is also a third low-high-frequency coupling gap between the second low-frequency branch and the high-frequency branch, with a spacing of 1.7mm; there is also a fourth low-high-frequency coupling gap between the second low-frequency branch and the high-frequency branch, with a spacing of 1.2mm.

[0009] As a further improvement of the present invention, the antenna adopts a flexible printed circuit FPC, and the structure of the antenna is arranged on the FPC.

[0010] As a further improvement of the present invention, the antenna also includes a coaxial line, one end of the coaxial line is connected to the RF signal access end through a coaxial line terminal head, and the other end of the coaxial line is electrically connected to the grounding part through a coaxial line welding point and electrically connected to the feeding part through a coaxial line signal point welding point.

[0011] As a further improvement of the present invention, the coaxial cable terminal head is an ipex head.

[0012] As a further improvement of the present invention, the back side of the antenna further includes adhesive.

[0013] As a further improvement of the present invention, the antenna is attached to the base of the camera.

[0014] The beneficial effects of the utility model are as follows: the small 4G cellular wireless communication camera antenna of the utility model adopts the form of FPC plus coaxial line, and the antenna routing is reasonably designed so as to have a wider working bandwidth, and can take into account the bandwidth of the entire 4G cellular communication frequency band, and has better antenna performance. At the same time, the utility model designs the antenna at the camera base position so that it can obtain a better antenna environment and assembly environment, achieving the product characteristics of easy assembly, excellent performance, stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front structural schematic diagram of the utility model antenna;

[0016] Figure 2 It is a schematic diagram of the back structure of the antenna of the utility model;

[0017] Figure 3 It is the S11 impedance characteristic curve diagram of the antenna of the utility model;

[0018] Figure 4 It is a voltage standing wave ratio curve diagram of the utility model antenna;

[0019] in,

[0020] 1: Coaxial cable terminal head;

[0021] 2: Coaxial cable;

[0022] 3: The first low frequency and ground coupling gap;

[0023] 4: the first low-frequency branch;

[0024] 5: Coaxial cable welding location;

[0025] 6: Coaxial cable signal point welding point;

[0026] 7: high frequency branch;

[0027] 8: The first low-high frequency coupling gap;

[0028] 9: Antenna ground branch

[0029] 10: The second low frequency and ground coupling gap;

[0030] 11: second low high frequency coupling gap;

[0031] 12: third low high frequency coupling gap;

[0032] 13: Second low frequency branch;

[0033] 14: fourth low-high frequency coupling gap;

[0034] 15: Adhesive backing. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] like Figure 1-2As shown, the small 4G cellular wireless communication camera antenna designed by the utility model includes a coaxial line terminal head 1, a coaxial line 2, a feeding part and a grounding part. Among them, the coaxial line terminal head 1 is arranged at one end of the coaxial line 2, and the other end of the coaxial line 2 is electrically connected to the grounding part through the coaxial line welding point 5 and electrically connected to the feeding part through the coaxial line signal point welding point 6; the grounding part includes an antenna ground branch 9, and the feeding part includes a first low-frequency branch 4, a high-frequency branch 7 and a second low-frequency branch 13. The first low-frequency branch 4 is a straight branch, the second low-frequency branch 13 is a C-type branch, the high-frequency branch is connected to the middle of the first low-frequency branch 4, the second low-frequency branch 13 surrounds the high-frequency branch 7, and the second low-frequency branch is connected to the first low-frequency branch. The antenna ground branch is an L-shaped branch.

[0037] There is a first low-frequency and ground coupling gap 3 between the first low-frequency branch 4 and the antenna ground branch 9, with a spacing of 1.2mm; there is a second low-frequency and ground coupling gap 10 between the second low-frequency branch 13 and the antenna ground branch 9, with a spacing of 1.4mm; there is a first low-high frequency coupling gap 8 between the first low-frequency branch 4 and the high-frequency branch 7, with a spacing of 1.0mm; there is a second low-high frequency coupling gap 11 between the second low-frequency branch 13 and the high-frequency branch 7, with a spacing of 1.4mm; there is also a third low-high frequency coupling gap 12 between the second low-frequency branch 13 and the high-frequency branch 7, with a spacing of 1.7mm; there is also a fourth low-high frequency coupling gap 14 between the second low-frequency branch 13 and the high-frequency branch 7, with a spacing of 1.2mm.

[0038] According to the current design, the antenna can obtain better bandwidth and performance. The coaxial line welding method is adopted for easy assembly.

[0039] There is also adhesive 15 on the back of the antenna circuit board of the utility model, which facilitates the assembly of the antenna on the communication equipment.

[0040] The antenna of the utility model adopts a flexible printed circuit FPC, and the structure of the antenna is arranged on the FPC. The coaxial line terminal head 1 uses a first-generation ipex head, and the coaxial line terminal head 1 is connected to a first-generation ipex connector on the mainboard to receive input of radio frequency signals.

[0041] The antenna of the utility model can take into account the design of the current miniaturized camera while having higher antenna performance parameters, and can also take into account the 4G communication frequency bands of major domestic operators, and has the characteristics of simple assembly, strong adaptability, good stability, excellent performance, etc. In terms of materials, considering the use characteristics of wireless cameras, the cameras will rotate and may be placed in some harsh outdoor environments, the coaxial line plus FPC design adopted by the antenna makes the antenna have better stability and reliability.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0043] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A small 4G cellular wireless communication camera antenna, characterized in that: The antenna comprises a feeding part and a grounding part, the grounding part comprises an antenna ground branch, and the feeding part comprises a first low-frequency branch, a high-frequency branch, and a second low-frequency branch; The first low-frequency branch is a straight branch, the second low-frequency branch is a C-shaped branch, the high-frequency branch is connected to the middle of the first low-frequency branch, the second low-frequency branch surrounds the high-frequency branch, and the second low-frequency branch is connected to the first low-frequency branch, and the antenna ground branch is an L-shaped branch; there is a first low-frequency and ground coupling gap between the first low-frequency branch and the antenna ground branch, with a spacing of 1.2 mm; There is a second low-frequency and ground coupling gap between the second low-frequency branch and the antenna ground branch, with a spacing of 1.4mm; There is a first low-frequency and high-frequency coupling gap between the first low-frequency branch and the high-frequency branch, with a spacing of 1.0 mm; There is a second low-frequency and high-frequency coupling gap between the second low-frequency branch and the high-frequency branch, with a spacing of 1.4 mm; There is a third low-frequency and high-frequency coupling gap between the second low-frequency branch and the high-frequency branch, with a spacing of 1.7 mm; There is also a fourth low-frequency and high-frequency coupling gap between the second low-frequency branch and the high-frequency branch, with a spacing of 1.2 mm.

2. The antenna according to claim 1, characterized in that: The antenna adopts a flexible printed circuit FPC, and the structure of the antenna is arranged on the FPC.

3. The antenna according to claim 1, characterized in that: The antenna also includes a coaxial line, one end of which is connected to the RF signal access end through a coaxial line terminal head, and the other end of the coaxial line is electrically connected to the grounding part through a coaxial line welding point and electrically connected to the feeding part through a coaxial line signal point welding point.

4. The antenna according to claim 3, characterized in that: The coaxial cable terminal head is an ipex head.

5. The antenna according to claim 1, characterized in that: The back side of the antenna also includes adhesive backing.

6. The antenna according to claim 5, characterized in that: The antenna is attached to the camera base.

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