4G antenna structure capable of improving antenna performance

Abstract

The utility model provides a 4G antenna structure capable of improving antenna performance, and belongs to the field of antenna structures. The antenna comprises a PCB, the PCB is provided with a low-frequency radiation vibration element, a high-frequency radiation vibration element and a coupling radiation vibration element, and a bandwidth expansion unit is arranged between the low-frequency radiation vibration element and the coupling radiation vibration element. The coupling radiation unit comprises a first coupling unit arranged on the front surface of the PCB and a second coupling unit arranged on the back surface of the PCB, the first coupling unit and the second coupling unit are electrically connected by conducting through holes on the front surface and the back surface of the PCB, and the first coupling unit is provided with a ground feeding welding spot. And a feed welding spot matched with the feed ground welding spot is arranged on the high-frequency radiation element. The beneficial effects of the utility model are that the structure is compact, and the size of the 4G antenna structure can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of antenna structures, and in particular to a 4G antenna structure capable of improving antenna performance. Background Art

[0002] 4G antennas are currently the mainstream communications antennas, used in many electronic devices, including CPE devices. CPE, short for customer premises equipment, refers to equipment located at the end-user's premises, typically for telephones or other services. Common examples include telephones, cable TV set-top boxes, and digital subscriber line (DSL) routers. To improve antenna performance, existing onboard 4G antennas typically feature multiple extension arms to maximize ground length. However, this significantly increases antenna length. With the miniaturization and integration of CPE products, reducing antenna size and achieving higher performance within limited space is a critical consideration. Utility Model Content

[0003] In order to solve the problems in the prior art, the present invention provides a 4G antenna structure that can improve antenna performance, thereby reducing the size of the 4G antenna and effectively improving the antenna performance.

[0004] The utility model discloses a 4G antenna structure capable of improving antenna performance, including a PCB board, on which a low-frequency radiation vibrator, a high-frequency radiation vibrator, and a coupled radiation vibrator are provided, wherein a bandwidth expansion unit is provided between the low-frequency radiation vibrator and the coupled radiation vibrator, and the coupled radiation unit includes a first coupling unit arranged on the front side of the PCB board and a second coupling unit arranged on the back side of the PCB board, the first coupling unit and the second coupling unit are electrically connected via a conductive hole connecting the front and back sides of the PCB board, a ground feeding solder point is provided on the first coupling unit, and a power feeding solder point cooperating with the ground feeding solder point is provided on the high-frequency radiation vibrator.

[0005] Furthermore, the first coupling unit and the second coupling unit are symmetrically distributed on the front and back sides of the PCB board.

[0006] Furthermore, there are multiple vias, which are evenly distributed on the coupling radiation unit.

[0007] Furthermore, a coupling channel is provided in the middle of the coupled radiation vibrator on the front of the PCB board, a ground feeding solder point is provided at the bottom of the coupling channel, one end of the high-frequency radiation vibrator extends into the coupling channel, and a feeding solder point corresponding to the ground feeding solder point is provided at the front end.

[0008] Furthermore, coupling gaps are respectively provided between the high-frequency radiation oscillator, the low-frequency radiation oscillator and the coupling radiation oscillator.

[0009] Furthermore, the PCB board is made of FR4 material, and is provided with buckles for easy assembly.

[0010] Furthermore, the size of the PCB board is 110mm*14.4mm*1.2mm, and the low-frequency radiation element, bandwidth extension unit, high-frequency radiation element, and coupled radiation element are spread all over the PCB board.

[0011] Furthermore, a gold-plated layer is provided on the upper surfaces of the power feeding solder joint and the ground feeding solder joint.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention arranges the grounded coupling radiation element on the front and back sides of the PCB board, and the coupling units on the front and back sides are electrically connected through conductive holes to form a whole, thereby effectively increasing the length of the extended ground, improving the performance of the antenna, and effectively reducing the size of the 4G antenna structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 and Figure 2 This is a schematic structural diagram of an embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of the gain test effect of the low-frequency band antenna of the utility model;

[0016] Figure 4 This is a schematic diagram of the test results of the low-frequency band antenna efficiency of the utility model;

[0017] Figure 5 This is a schematic diagram of the high-frequency band antenna gain test effect of the utility model;

[0018] Figure 6 This is a schematic diagram of the efficiency test results of the high-frequency band antenna of the utility model. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meanings as commonly understood by those skilled in the art to which this utility model belongs. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The terms "including" and "having" and any variations thereof in the specification and claims of this utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this utility model or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0020] References to "embodiments" in this disclosure mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to mutually exclusive, independent, or alternative embodiments to other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this disclosure may be combined with other embodiments.

[0021] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0022] like Figures 1 and 2 As shown, the 4G antenna structure of the utility model that can improve the antenna performance includes a PCB board 40 with a double-sided line design, and the PCB board 40 is provided with a low-frequency radiation vibrator 401, a high-frequency radiation vibrator 403, and a coupled radiation vibrator 404, wherein a serpentine bandwidth expansion unit 402 is provided between the low-frequency radiation vibrator 401 and the coupled radiation vibrator 404, and the coupled radiation unit 404 includes a first coupling unit 413 arranged on the front side of the PCB board and a second coupling unit 414 arranged on the back side of the PCB board. The coupled radiation unit 404 is also evenly provided with 8 conductive holes 405 that connect the front and back sides of the PCB board, and the first coupling unit 413 and the second coupling unit 414 are electrically connected through the conductive holes 405. A ground feed solder point 407 is provided on the first coupling unit 413, and a feeding solder point 408 that cooperates with the ground feed solder point is provided on the high-frequency radiation vibrator.

[0023] Preferably, the upper surfaces of the power feeding solder joint 408 and the ground feeding solder joint 407 are provided with a gold plating layer to prevent the solder joints from being oxidized, thereby ensuring the stability of soldering.

[0024] The utility model arranges the grounded coupling radiation element 404 on the front and back sides of the PCB board 40, and the coupling units on the front and back sides are electrically connected to form a whole through the conductive hole 405, thereby effectively increasing the length of the extended ground and improving the performance of the antenna. In addition, since part of the extended line is arranged on the back side of the PCB board 40, the size of the 4G antenna structure can be effectively reduced.

[0025] Preferably, the coupled radiating element 404 in this example has a semi-enclosed structure, with a coupling channel 411 disposed in the middle. A ground feed solder point 407 is located at the bottom of the coupling channel 411. One end of the high-frequency radiating element 403 extends into the coupling channel 411, and a power feed solder point 408 is located at the front end, corresponding to the ground feed solder point 407. Furthermore, coupling gaps 412 are provided between the periphery of the high-frequency radiating element 403 and the low-frequency radiating element 401 and the coupled radiating element 404. By configuring the semi-enclosed structure, the present invention reduces the difficulty of setting the coupling gaps 412. This structural arrangement allows the low-frequency radiating element 401, bandwidth extension unit 402, high-frequency radiating element 403, and coupled radiating element 404 to fully cover the PCB 40, effectively utilizing the space on the PCB 40 and making the circuitry on the PCB 40 more compact, further reducing the size of the antenna structure. The dimensions of the PCB 40 in this example are 110 mm * 14.4 mm * 1.2 mm.

[0026] Preferably, the coupling radiation unit 404 is symmetrically distributed on the front and back sides of the PCB board 40. On the back side of the PCB board, there are also two ground connection structures 409 and 410 with the same structure as the front side of the PCB board 40, which further increase the length of the ground and improve the performance of the antenna.

[0027] The operating frequency of the low-frequency radiation vibrator 401 of the present invention is 700-960MHz. The middle serpentine bandwidth extension unit 402, through the combination of length and gap, is equivalent to loading a set of "LC" circuits between the front and back of the low frequency, which has the function of widening the low-frequency bandwidth and controlling the frequency point, so that it can work within the specified frequency. The operating frequency of the high-frequency radiation vibrator 403 in this example is 1700-2200MHz. Its length controls the frequency band, and the gap and shape between the vibrators around it control the bandwidth. The coupling radiation vibrator 404 set on the front and back sides can increase the length of the ground (the antenna must be referenced to the ground, and the length of the reference ground is λ / 4), which can improve the performance of the antenna. The 8 conductive holes 405 connect the line paths on the front and back sides to each other to form a whole.

[0028] Preferably, the material of the PCB board 40 is FR4 material, and the PCB board is provided with buckles for easy assembly. The PCB-FR4 material is stable, will not deform or bend, and is easy to assemble. During assembly, buckles are reserved directly on the shell material, and the PCB board 40 can be directly buckled in the designated position without falling off.

[0029] Experimental verification

[0030] Using a darkroom and a 5701B network analyzer, the 4G antenna structure of this utility model was subjected to 3D passive efficiency testing. The superior performance of this utility model was then demonstrated through antenna gain and efficiency. Antenna gain refers to the ratio of the power density of the signal generated by an actual antenna to that generated by an ideal radiating element at the same point in space, given equal input power. It quantitatively describes the degree to which an antenna concentrates input power and is used to measure the antenna's ability to transmit and receive signals in a specific direction. Antenna efficiency refers to the ratio of the power radiated by the antenna (i.e., the power effectively converted into electromagnetic waves) to the active power input to the antenna. Both are among the most important parameters for antenna selection.

[0031] The operating frequency of the 4G antenna of the present invention is 700~960MHz and 1700~2200MHz. The present invention tests the two frequency bands respectively. Figure 3 and Figure 4 As shown in the figure, in the low frequency range, the gain is in the range of -0.7 to 3dB, while the efficiency is above 40dB, even reaching 85dB, indicating that in the low frequency band, the gain and efficiency indicators of the 4G antenna of the utility model are good. Figure 5 and Figure 6 As shown, within the high frequency band, the gain is in the range of 1.2 to 4.8 dB, and the efficiency is above 56 dB, which indicates that the gain and efficiency indicators of the present invention are good in the high frequency band.

[0032] In summary, the present invention can achieve good performance of the 4G antenna structure in a smaller limited space through a unique layout, which indirectly illustrates that the present invention can effectively improve antenna performance.

[0033] The specific implementation methods described above are preferred implementation methods of the present invention, and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the specific implementation methods. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. A 4G antenna structure capable of improving antenna performance, characterized by: It includes a PCB board, on which a low-frequency radiation vibrator, a high-frequency radiation vibrator, and a coupled radiation vibrator are provided, wherein a bandwidth expansion unit is provided between the low-frequency radiation vibrator and the coupled radiation vibrator, and the coupled radiation unit includes a first coupling unit arranged on the front side of the PCB board and a second coupling unit arranged on the back side of the PCB board, the first coupling unit and the second coupling unit are electrically connected through a conductive hole that conducts on the front and back sides of the PCB board, a ground feeding solder point is provided on the first coupling unit, and a power feeding solder point that cooperates with the ground feeding solder point is provided on the high-frequency radiation vibrator.

2. The 4G antenna structure capable of improving antenna performance according to claim 1, characterized in that: The first coupling unit and the second coupling unit are symmetrically distributed on the front and back sides of the PCB board.

3. The 4G antenna structure capable of improving antenna performance according to claim 2, characterized in that: There are multiple vias, which are evenly distributed on the coupling radiation unit.

4. The 4G antenna structure capable of improving antenna performance according to claim 1, characterized in that: A coupling channel is provided in the middle of the coupled radiation vibrator on the front of the PCB board, and a ground feeding solder point is provided at the bottom of the coupling channel. One end of the high-frequency radiation vibrator extends into the coupling channel, and a feeding solder point corresponding to the ground feeding solder point is provided at the front end.

5. The 4G antenna structure capable of improving antenna performance according to claim 4, characterized in that: Coupling gaps are respectively provided between the high-frequency radiation oscillator, the low-frequency radiation oscillator and the coupling radiation oscillator.

6. The 4G antenna structure capable of improving antenna performance according to claim 4, characterized in that: The material of the PCB board is FR4 material, and the PCB board is provided with buckles for easy assembly.

7. The 4G antenna structure capable of improving antenna performance according to claim 5, characterized in that: The size of the PCB board is 110mm*14.4mm*1.2mm, and the low-frequency radiation vibrator, bandwidth extension unit, high-frequency radiation vibrator, and coupled radiation vibrator cover the entire PCB board.

8. The 4G antenna structure capable of improving antenna performance according to claim 1, characterized in that: The upper surfaces of the power feeding solder joint and the ground feeding solder joint are provided with a gold plating layer.

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