Antenna structure

Abstract

The utility model discloses an antenna structure, which comprises a substrate and an antenna unit arranged on one side of the substrate, the antenna unit comprises a radiation unit, a coupling unit and a grounding unit, and the antenna structure is characterized in that the radiation unit is C-shaped and extends along the edge of the substrate, and the grounding unit is positioned on the inner side of the radiation unit; the coupling unit comprises a first coupling branch and a second coupling branch, and the first coupling branch and the second coupling branch are connected with the grounding unit and located on the inner side of the radiation unit. The antenna structure provided by the utility model has the characteristics of high performance and small size, and by arranging the C-shaped radiation unit extending along the edge of the substrate on one side of the substrate, compared with a traditional long-strip antenna, the area of the radiation unit is increased, transmission of high-frequency signals and low-frequency signals can be realized at the same time, and the antenna structure is simple in structure and convenient to use. And the grounding unit and the coupling unit are arranged at the inner side of the radiation unit, so that the overall size of the antenna unit is effectively reduced, and the antenna unit is suitable for a miniaturized intelligent terminal.

Description

Technical Field

[0001] The utility model relates to the technical field of communications, and in particular to an antenna structure. Background Art

[0002] 4G is a combination of 3G and WLAN. It can quickly transmit data and high-quality audio, video and images, and has been widely used in the Internet of Things. The frequency coverage of 4G signals is relatively wide, from about 700MHz to 3GHz. For miniaturized smart terminals, high-performance, small-size antennas are particularly important. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-performance, small-size antenna structure.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an antenna structure, including a substrate and an antenna unit arranged on one side of the substrate, the antenna unit including a radiation unit, a coupling unit and a grounding unit, the radiation unit is C-shaped and extends along the edge of the substrate, the grounding unit is located on the inner side of the radiation unit, the coupling unit includes a first coupling branch section and a second coupling branch section, the first coupling branch section and the second coupling branch section are both connected to the grounding unit and are located on the inner side of the radiation unit.

[0005] Furthermore, the shape of the first coupling branch section and the shape of the second coupling branch section are both rectangular.

[0006] Furthermore, the length of the first coupling branch is greater than the length of the second coupling branch.

[0007] Furthermore, an extension direction of the first coupling branch section and an extension direction of the second coupling branch section are perpendicular to each other.

[0008] Furthermore, the outer circumference of the radiation unit is 75%-85% of the circumference of the substrate.

[0009] Furthermore, the outer circumference of the radiation unit is 80% of the circumference of the substrate.

[0010] Furthermore, the radiation unit is further provided with a first welding portion extending in a direction close to the grounding unit, and the grounding unit is provided with a second welding portion at one end close to the first welding portion.

[0011] Furthermore, an adhesive layer is provided on a side of the substrate facing away from the antenna unit.

[0012] Furthermore, the material of the adhesive layer is 3M glue.

[0013] The beneficial effects of the present invention are that the antenna structure provided by the present invention has the characteristics of high performance and small size. By arranging a C-shaped radiation unit on one side of the substrate and extending along the edge of the substrate, compared with the traditional long strip antenna, the area of ​​the radiation unit is increased, the performance of the antenna is improved, and the transmission of high-frequency signals and low-frequency signals can be achieved simultaneously. In addition, the grounding unit and the coupling unit are arranged on the inner side of the radiation unit, which effectively reduces the overall size of the antenna unit and is suitable for miniaturized smart terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of one side of the substrate of the first embodiment of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the other side of the substrate of the first embodiment of the utility model;

[0016] Figure 3 This is a return loss diagram of the antenna structure of the first embodiment of the present utility model;

[0017] Figure 4 This is a graph showing the relationship between the radiation efficiency of the antenna structure of the first embodiment of the present utility model and the frequency;

[0018] Figure 5 The directional diagram of the antenna structure of the first embodiment of the utility model when the operating frequency is 820 MHz;

[0019] Figure 6 This is the directional diagram of the antenna structure of the first embodiment of the present utility model when the operating frequency is 2300 MHz;

[0020] Figure 7 This is the radiation pattern of the antenna structure of the first embodiment of the present utility model when the operating frequency is 2690 MHz.

[0021] Description of labels:

[0022] 1. substrate; 2. radiation unit; 21. first welding part; 3. grounding unit; 31. second welding part; 4. first coupling branch; 5. second coupling branch; 6. adhesive layer. DETAILED DESCRIPTION

[0023] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0024] Please refer to Figures 1 to 7, an antenna structure, including a substrate 1 and an antenna unit arranged on one side of the substrate 1, the antenna unit including a radiation unit 2, a coupling unit and a grounding unit 3, the radiation unit 2 is C-shaped and extends along the edge of the substrate 1, the grounding unit 3 is located on the inner side of the radiation unit 2, the coupling unit includes a first coupling branch section 4 and a second coupling branch section 5, the first coupling branch section 4 and the second coupling branch section 5 are both connected to the grounding unit 3 and are located on the inner side of the radiation unit 2.

[0025] From the above description, it can be seen that the beneficial effect of the utility model is that: by arranging a C-shaped radiation unit 2 on one side of the substrate 1 and extending along the edge of the substrate 1, the area of ​​the radiation unit 2 is increased compared to the traditional long strip antenna, and the two coupling branches can increase the bandwidth of the antenna, improve the performance of the antenna, and can simultaneously realize the transmission of high-frequency signals and low-frequency signals, and the grounding unit 3 and the coupling unit are arranged on the inner side of the radiation unit 2, which effectively reduces the overall size of the antenna unit, making it suitable for miniaturized smart terminals.

[0026] Furthermore, the shapes of the first coupling branch 4 and the second coupling branch 5 are both rectangular.

[0027] It can be seen from the above description that setting the first coupling branch 4 and the second coupling branch 5 to be rectangular in shape facilitates the molding of the first coupling branch 4 and the second coupling branch 5 and reduces the process difficulty.

[0028] Furthermore, the length of the first coupling branch 4 is greater than the length of the second coupling branch 5 .

[0029] It can be seen from the above description that the lengths of the first coupling branch 4 and the second coupling branch 5 can be set according to actual application requirements.

[0030] Furthermore, an extending direction of the first coupling branch section 4 and an extending direction of the second coupling branch section 5 are perpendicular to each other.

[0031] It can be seen from the above description that the relative position relationship between the first coupling branch 4 and the second coupling branch 5 can be set according to actual application requirements.

[0032] Furthermore, the outer circumference of the radiation unit 2 is 75%-85% of the circumference of the substrate 1 .

[0033] Furthermore, the outer circumference of the radiation unit 2 is 80% of the circumference of the substrate 1 .

[0034] It can be seen from the above description that the ratio of the outer perimeter of the radiation unit 2 to the perimeter of the substrate 1 can be adjusted according to actual application requirements.

[0035] Furthermore, the radiation unit 2 is further provided with a first welding portion 21 extending toward the direction close to the grounding unit 3 , and the grounding unit 3 is provided with a second welding portion 31 at one end close to the first welding portion 21 .

[0036] It can be seen from the above description that the first welding portion 21 and the second welding portion 31 are provided to facilitate connection with the signal transmission line of the smart terminal.

[0037] Furthermore, an adhesive layer 6 is provided on a side of the substrate 1 facing away from the antenna unit.

[0038] Furthermore, the material of the adhesive layer 6 is 3M glue.

[0039] It can be seen from the above description that providing the adhesive layer 6 on the substrate 1 facilitates fixing the antenna on the smart terminal, and is convenient for installation and disassembly.

[0040] Please refer to Figures 1 to 7 , Embodiment 1 of the utility model is: an antenna structure, comprising a substrate 1 and an antenna unit arranged on one side of the substrate 1, the antenna unit comprising a radiation unit 2, a coupling unit and a grounding unit 3, the radiation unit 2 is C-shaped and extends along the edge of the substrate 1, the grounding unit 3 is located on the inner side of the radiation unit 2, the coupling unit comprises a first coupling branch 4 and a second coupling branch 5, the first coupling branch 4 and the second coupling branch 5 are both connected to the grounding unit 3 and are located on the inner side of the radiation unit 2; it can be understood that by arranging a C-shaped radiation unit 2 on one side of the substrate 1 and extending along the edge of the substrate 1, the area of ​​the radiation unit 2 is increased compared with the traditional long strip antenna, and the two coupling branches can increase the bandwidth of the antenna, improve the performance of the antenna, and can simultaneously realize the transmission of high-frequency signals and low-frequency signals, and the grounding unit 3 and the coupling unit are arranged on the inner side of the radiation unit 2, which effectively reduces the overall size of the antenna unit, and is suitable for miniaturized smart terminals.

[0041] Preferably, the shape of the first coupling branch section 4 and the shape of the second coupling branch section 5 are both rectangular, so that the molding of the first coupling branch section 4 and the second coupling branch section 5 is facilitated and the process difficulty is reduced. In the present embodiment, the length of the first coupling branch section 4 is greater than the length of the second coupling branch section 5, and the length of the first coupling branch section 4 and the second coupling branch section 5 can be set according to actual application requirements; further, the extension direction of the first coupling branch section 4 and the extension direction of the second coupling branch section 5 are perpendicular to each other, and the relative position relationship of the first coupling branch section 4 and the second coupling branch section 5 can be set according to actual application requirements.

[0042] Optionally, the outer circumference of the radiation unit 2 is 75%-85% of the circumference of the substrate 1. Preferably, the outer circumference of the radiation unit 2 is 80% of the circumference of the substrate 1. The ratio of the outer circumference of the radiation unit 2 to the circumference of the substrate 1 can be adjusted according to actual application requirements.

[0043] In this embodiment, the radiation unit 2 is also provided with a first welding portion 21 extending in a direction close to the grounding unit 3, and the grounding unit 3 is provided with a second welding portion 31 at one end close to the first welding portion 21. It is easy to understand that the first welding portion 21 and the second welding portion 31 are provided to facilitate connection with the signal transmission line of the smart terminal; specifically, the side of the substrate 1 facing away from the antenna unit is provided with an adhesive layer 6, and the material of the adhesive layer 6 is 3M glue. Providing the adhesive layer 6 on the substrate 1 facilitates fixing the antenna on the smart terminal, and is convenient for installation and disassembly.

[0044] Please combine Figures 3 to 7 ,in, Figure 3 is the return loss diagram of the antenna structure; Figure 4 is a graph showing the relationship between the radiation efficiency of the antenna structure and the frequency; Figure 5 is the directional pattern of the antenna structure when the operating frequency is 820MHz; Figure 6 is the directional pattern of the antenna structure when the operating frequency is 2300MHz; Figure 7 It is the directional diagram of the antenna structure when the operating frequency is 2690MHz; it is not difficult to see that the antenna structure has good antenna performance and omnidirectionality, and can stably exert its antenna performance within the operating frequency range of 700MHz to 3GHz.

[0045] To sum up, the antenna structure provided by the utility model has the characteristics of high performance and small size. By arranging a C-shaped radiation unit on one side of the substrate and extending along the edge of the substrate, compared with the traditional long strip antenna, the area of ​​the radiation unit is increased, and the performance of the antenna is improved. It can realize the transmission of high-frequency signals and low-frequency signals at the same time, and the grounding unit and the coupling unit are arranged on the inner side of the radiation unit, which effectively reduces the overall size of the antenna unit, and is suitable for miniaturized smart terminals.

[0046] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. An antenna structure, comprising a substrate and an antenna unit arranged on one side of the substrate, wherein the antenna unit comprises a radiation unit, a coupling unit and a grounding unit, characterized in that: The radiation unit is C-shaped and extends along the edge of the substrate, the grounding unit is located on the inner side of the radiation unit, and the coupling unit includes a first coupling branch and a second coupling branch, the first coupling branch and the second coupling branch are both connected to the grounding unit and are located on the inner side of the radiation unit.

2. The antenna structure according to claim 1, characterized in that: The shape of the first coupling branch and the shape of the second coupling branch are both rectangular.

3. The antenna structure according to claim 2, characterized in that: The length of the first coupling branch is greater than the length of the second coupling branch.

4. The antenna structure according to claim 2 or 3, characterized in that: An extension direction of the first coupling branch section and an extension direction of the second coupling branch section are perpendicular to each other.

5. The antenna structure according to claim 1, characterized in that: The outer perimeter of the radiation unit is 75%-85% of the perimeter of the substrate.

6. The antenna structure according to claim 5, characterized in that: The outer perimeter of the radiation unit is 80% of the perimeter of the substrate.

7. The antenna structure according to claim 1, characterized in that: The radiation unit is further provided with a first welding portion extending in a direction close to the grounding unit, and the grounding unit is provided with a second welding portion at one end close to the first welding portion.

8. The antenna structure according to claim 1, characterized in that: A bonding layer is provided on a side of the substrate facing away from the antenna unit.

9. The antenna structure according to claim 8, characterized in that: The material of the adhesive layer is 3M glue.

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