A device for reducing the coupling effect of a circuit board

Abstract

The present invention is applicable to the technical field of base station antennas, and provides a device for reducing the influence of circuit board coupling, including a reflector and at least one radiation unit assembly. The radiation unit assembly includes a radiation unit and a circuit board. The feeding piece of the radiation unit is welded to the circuit of the circuit board, and the pin of the radiation unit is welded to the ground of the circuit board. The radiation unit assembly is fixed on the front surface of the reflector, and a plurality of decoupling regions are provided on the ground of the circuit board. Thereby, the device for reducing the influence of circuit board coupling of the present invention can reduce the influence of coupling, and does not occupy space or increase cost.

Description

Technical Field

[0001] The present invention relates to the technical field of base station antennas, and particularly to a device for reducing the influence of circuit board coupling. Background Art

[0002] With the advent of the 5G era, mobile communication has become increasingly important in all aspects of human activities. In some cases, people can hardly move forward without the support of a mobile communication network. As an essential component of the mobile communication network system, the base station antenna plays a crucial role in network coverage. Currently, its market demand shows the characteristics of multi-frequency multi-port, common aperture plane, and miniaturization, and the demand for frequency-divided antennas and multi-beam antennas has increased significantly.

[0003] Briefly speaking, the core components of the base station antenna are radiation units, a feeding network, and a reflector. Among them, the radiation units are usually fixed on the front of the reflector, and the feeding network is usually fixed on the back of the reflector. The radiation units are electrically connected to other components of the feeding network, such as a power splitter and a phase shifter, through cables. Of course, there are also cases where the radiation units are directly electrically connected to an integrated feeding network without using cables. However, since the circuit board is fixedly attached to the reflector and the gap between them is very small, such as 0.3 mm, energy coupling will occur between the ground and circuits of the circuit board, the radiation units, and the reflector due to electromagnetic induction, resulting in the deterioration of the port performance and radiation performance of the radiation units, and ultimately the decline of the overall machine performance.

[0004] In summary, the existing circuit board coupling influence technology obviously has inconveniences and defects in actual use, so it is necessary to be improved. Summary of the Invention

[0005] Aiming at the above defects, the purpose of the present invention is to provide a device for reducing the influence of circuit board coupling, which can reduce the coupling influence, does not occupy space, and does not increase costs.

[0006] To achieve the above purpose, the present invention provides a device for reducing the influence of circuit board coupling, including a reflector and at least one radiation unit assembly. The radiation unit assembly includes a radiation unit and a circuit board. The feeding piece of the radiation unit is welded to the circuit of the circuit board, and the pin of the radiation unit is welded to the ground of the circuit board. The radiation unit assembly is fixed on the front of the reflector, and a plurality of decoupling regions are provided on the ground of the circuit board.

[0007] According to the device for reducing the influence of circuit board coupling of the present invention, a first decoupling region is provided between two polarized circuits on the ground of the circuit board that are respectively welded to two feeding pieces of the radiation unit to form a whole.

[0008] For the device for reducing the coupling effect of a circuit board according to the present invention, a second decoupling area is provided within the area enclosed by the pins of the radiation unit on the ground of the circuit board.

[0009] For the device for reducing the coupling effect of a circuit board according to the present invention, a third decoupling area is provided outside the edge of the circuit of the circuit board on the ground of the circuit board.

[0010] For the device for reducing the coupling effect of a circuit board according to the present invention, the radiation unit assembly includes one or more radiation units.

[0011] For the device for reducing the coupling effect of a circuit board according to the present invention, the circuit board is provided with holes for fixing to the reflector.

[0012] For the device for reducing the coupling effect of a circuit board according to the present invention, a cable is provided at the port of the circuit board. The core wire of the cable passes through the dielectric layer of the circuit board and is welded to the circuit of the circuit board. The shielding layer of the cable is welded to the ground of the circuit board. The feeding piece of the radiation unit passes through the dielectric layer of the circuit board and is welded to the circuit of the circuit board. The pins of the radiation unit pass through the dielectric layer of the circuit board and are welded to the ground of the circuit board.

[0013] For the device for reducing the coupling effect of a circuit board according to the present invention, the reflector is provided with notches respectively welded to the radiation unit and the cable.

[0014] For the device for reducing the coupling effect of a circuit board according to the present invention, an insulating gasket is provided between the ground of the circuit board and the reflector.

[0015] For the device for reducing the coupling effect of a circuit board according to the present invention, the surface of the circuit board excluding the welding area is coated with insulating green oil.

[0016] The present invention provides a device for reducing the coupling effect of a circuit board, including a reflector and at least one radiation unit assembly. The radiation unit assembly includes a radiation unit and a circuit board. The radiation unit and the circuit board are integrally connected by welding. The radiation unit assembly composed of the radiation unit and the circuit board is fixed to the front of the reflector in the form of an assembly, and several decoupling areas are provided on the ground of the circuit board. Thereby, the device for reducing the coupling effect of the circuit board of the present invention realizes reducing the coupling effect, and does not occupy space and does not increase cost. Description of the Drawings

[0017] Figure 1 is an assembled side view of the device for reducing the coupling effect of a circuit board according to an embodiment provided by the present invention;

[0018] Figure 2 is an assembled top view of the device for reducing the coupling effect of a circuit board according to an embodiment provided by the present invention;

[0019] Figure 3 It is a schematic diagram of the original state of a circuit board of a device for reducing the coupling effect of a circuit board provided by the present invention;

[0020] Figure 4 It is a schematic diagram of the improved state of a circuit board of a device for reducing the coupling effect of a circuit board provided by the present invention;

[0021] Figure 5 It is a schematic diagram of the original state of a circuit board of a device for reducing the coupling effect of a circuit board provided by another embodiment of the present invention;

[0022] Figure 6 It is a schematic diagram of the improved state of a circuit board of a device for reducing the coupling effect of a circuit board provided by another embodiment of the present invention;

[0023] Figure 7 It is a component standing wave diagram of the original state of a circuit board of a device for reducing the coupling effect of a circuit board provided by an embodiment of the present invention;

[0024] Figure 8 It is a component standing wave diagram of the improved state of a circuit board of a device for reducing the coupling effect of a circuit board provided by an embodiment of the present invention;

[0025] Figure 9 It is a component horizontal direction diagram of the original state of a circuit board of a device for reducing the coupling effect of a circuit board provided by an embodiment of the present invention;

[0026] Figure 10 It is a component horizontal direction diagram of the improved state of a circuit board of a device for reducing the coupling effect of a circuit board provided by an embodiment of the present invention. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] The present invention provides a device 100 for reducing the coupling effect of a circuit board, which includes a reflector and at least one radiation unit assembly. The number of radiation units can be 1, 2 or any number. The radiation unit assembly includes a radiation unit and a circuit board. The radiation unit and the circuit board are integrally connected by welding. The feeding piece of the radiation unit is welded to the circuit of the circuit board, and the pin of the radiation unit is welded to the ground of the circuit board. The radiation unit and the circuit board are fixed on the front surface of the reflector in the form of an assembly by rivets with holes, whereby the radiation unit assembly is fixed on the front surface of the reflector, so that the gap between the circuit board and the reflector is relatively large. There are several decoupling areas on the ground of the circuit board, which changes the energy distribution of the mutual coupling between the ground of the circuit board, the circuit, the radiation unit and the reflector, thereby weakening the influence of the above coupling and realizing the improvement of the performance level of the radiation unit assembly and the device.

[0029] Thereby, the device 100 for reducing the coupling effect of the circuit board of the present invention realizes the reduction of the coupling effect, and does not occupy space or increase cost.

[0030] Preferably, a cable is provided at the port of the circuit board. The core wire of the cable passes through the dielectric layer of the circuit board and is welded to the circuit of the circuit board. The shielding layer of the cable is welded to the ground of the circuit board. The feeding piece of the radiation unit passes through the dielectric layer of the circuit board and is welded to the circuit of the circuit board. The pin of the radiation unit passes through the dielectric layer of the circuit board and is welded to the ground of the circuit board. The circuit board provides electrical energy for the radiation unit through the cable.

[0031] As Figures 1 - 2 As shown in the device 100 for reducing the coupling effect of the circuit board of the present invention, one radiation unit assembly is provided on the reflector 1. The radiation unit 2 and the circuit board 3 are integrally connected by welding and are fixed on the front surface of the reflector 1 in the form of an assembly by rivets with holes 36. A feeding cable is provided at the port of the circuit board 3. The core wire 34 of the cable passes through the dielectric layer of the circuit board 3 and is welded to the circuit 31 of the circuit board 3. The shielding layer 35 of the cable is welded to the ground 32 of the circuit board 3. The feeding piece 21 of the radiation unit 2 passes through the dielectric layer of the circuit board 3 and is welded to the circuit 31 of the circuit board 3 at the round hole 33 on the ground 32 of the circuit board 3. The pin 22 of the radiation unit 2 passes through the dielectric layer of the circuit board 3 and is welded to the ground 32 of the circuit board 3. A notch 11 for welding the radiation unit 2 and the circuit board 3 is provided on the reflector 1.

[0032] Preferably, a first decoupling region 37 is provided between two polarized lines 31 which are respectively welded to two feed pieces 21 of the radiation unit 2 on the ground 32 of the circuit board 3, so as to change the energy distribution of the mutual coupling between the ground 32, the lines 31, the radiation unit 2 and the reflector 1 of the circuit board 3, thereby weakening the influence of the coupling and realizing the improvement of the performance level of the radiation unit assembly and the device.

[0033] Preferably, a second decoupling region 38 is provided in the region enclosed by the pins 22 of the radiation unit 2 on the ground 32 of the circuit board 3, so as to change the energy distribution of the mutual coupling between the ground 32, the lines 31, the radiation unit 2 and the reflector 1 of the circuit board 3, thereby weakening the influence of the coupling and realizing the improvement of the performance level of the radiation unit assembly and the device.

[0034] Preferably, a third decoupling region 39 is provided outside the edge of the line 31 of the circuit board 3 on the ground 32 of the circuit board 3, so as to change the energy distribution of the mutual coupling between the ground 32, the lines 31, the radiation unit 2 and the reflector 1 of the circuit board 3, thereby weakening the influence of the coupling and realizing the improvement of the performance level of the radiation unit assembly and the device.

[0035] As Figures 3 - 4 shown in the state of the circuit board 3 of the device for reducing the coupling influence of the circuit board according to an embodiment of the present invention, as Figure 4 shown, a plurality of decoupling regions are provided on the ground 32 of the circuit board 3. Specifically, a first decoupling region 37 is provided between two polarized lines 31 which are respectively welded to two feed pieces 21 of the radiation unit 2, a second decoupling region 38 is provided in the region enclosed by the pins 22 of the radiation unit 2, and a third decoupling region 39 is provided outside the edge of the line 31 of the circuit board 3. Thereby, the energy distribution of the mutual coupling between the ground 32, the lines 31, the radiation unit 2 and the reflector 1 of the circuit board 3 can be changed, so as to weaken the influence of the above-mentioned coupling and realize the improvement of the performance level of the radiation unit assembly and the device.

[0036] As Figures 5 - 6 shown in the state of the circuit board 3 of the device for reducing the coupling influence of the circuit board according to another embodiment of the present invention, as Figure 6A number of decoupling regions are provided on the ground 32 of the circuit board 3 shown. Specifically, a first decoupling region 37 is provided between two polarized circuits 31 that are respectively welded and integrated with two feeding pieces 21 of the radiation unit 2. A second decoupling region 38 is provided within the region enclosed by the pins 22 of the radiation unit 2. A third decoupling region 39 is provided outside the edge of the circuit 31 of the circuit board 3. Thereby, the energy distribution of the mutual coupling between the ground 32 of the circuit board 3, the circuit 31, the radiation unit 2, and the reflector 1 can be changed, so as to weaken the influence of the above-mentioned coupling and achieve an improvement in the performance level of the radiation unit assembly and the device.

[0037] Preferably, the radiation unit assembly includes one or more radiation units 2, and the number of the radiation units 2 can be increased or decreased in the radiation unit assembly according to needs.

[0038] Preferably, the circuit board 3 is provided with holes 36 for fixing to the reflector 1, and the radiation unit assembly is fixed to the reflector 1 by passing rivets through the holes 36 of the circuit board 3.

[0039] Preferably, the reflector 1 is provided with notches 11 respectively welded to the radiation unit 2 and the cable, and the radiation unit 2 and the cable are fixed to the reflector 1 by welding the notches 11.

[0040] Preferably, an insulating gasket is provided between the ground 32 of the circuit board 3 and the reflector 1. The insulating gasket hinders electromagnetic induction and reduces the coupling effect, causing the energy of the mutual coupling between the ground 32 of the circuit board 3, the circuit 31, the radiation unit 2, and the reflector 1 to change, thereby weakening the coupling effect and achieving an improvement in the performance level of the radiation unit assembly and the device.

[0041] Preferably, an insulating green oil is coated on the surface of the circuit board 3 except for the welding area. The insulating green oil hinders electromagnetic induction and reduces the coupling effect, causing the energy of the mutual coupling between the ground 32 of the circuit board 3, the circuit 31, the radiation unit 2, and the reflector 1 to change, thereby weakening the coupling effect and achieving an improvement in the performance level of the radiation unit assembly and the device.

[0042] In practical applications, such as Figures 7 - 10 shows the performance improvement comparison results of the corresponding radiation unit assembly. It can be seen that the impedance matching of the two polarizations of the radiation unit assembly is significantly balanced at 1710 MHz, the standing wave difference is significantly reduced, and the overall line shape is basically the same. Such as Figures 9 - 10As shown, the horizontal pattern of the radiation unit assembly converges significantly at 1710 MHz. The horizontal beamwidth in the entire frequency band of 1710 - 2690 MHz changes from 70.2 - 53.8° to 65.9 - 54.6°. The cross-polarization level becomes more symmetric within the range of ±60°, and the worst value is improved by approximately 2 dB. According to the array synthesis principle that the performance of a base station antenna is jointly determined by the array factor and the element factor, when the performance of the radiation unit assembly is improved, the performance level of the device will also be improved accordingly.

[0043] In summary, the present invention provides a device for reducing the influence of circuit board coupling, including a reflector and at least one radiation unit assembly. The radiation unit assembly includes a radiation unit and a circuit board. The radiation unit and the circuit board are integrally connected by welding. The radiation unit assembly composed of the radiation unit and the circuit board is fixed on the front surface of the reflector in the form of an assembly, and a plurality of decoupling regions are provided on the ground of the circuit board. Thereby, the device for reducing the influence of circuit board coupling of the present invention can reduce the influence of coupling, and does not occupy space or increase costs.

[0044] Certainly, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention. However, these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present invention.

Claims

1. A device for reducing the coupling effect of a circuit board, characterized in that It includes a reflector and at least one radiation unit assembly. The radiation unit assembly includes a radiation unit and a circuit board. The feeding piece of the radiation unit is welded to the circuit of the circuit board, and the pin of the radiation unit is welded to the ground of the circuit board. The radiation unit assembly is fixed on the front of the reflector, and there are several decoupling regions on the ground of the circuit board; There is a first decoupling region between two polarizing circuits on the ground of the circuit board that are welded to the two feeding pieces of the radiation unit respectively to form a whole; There is a second decoupling region in the area enclosed by the pins of the radiation unit on the ground of the circuit board; There is a third decoupling region on the ground of the circuit board outside the edge of the circuit of the circuit board.

2. The device for reducing the coupling effect of a circuit board according to claim 1, characterized in that, The radiation unit assembly includes one or more radiation units.

3. The device for reducing the coupling effect of a circuit board according to claim 1, wherein The circuit board is provided with holes for fixing to the reflector.

4. The device for reducing the coupling effect of a circuit board according to claim 1, wherein A cable is provided at the port of the circuit board. The core wire of the cable passes through the dielectric layer of the circuit board and is welded to the circuit of the circuit board, and the shielding layer of the cable is welded to the ground of the circuit board; The feeding piece of the radiation unit is welded to the circuit of the circuit board, and the pin of the radiation unit passes through the dielectric layer of the circuit board and is welded to the ground of the circuit board.

5. The device for reducing the coupling effect of a circuit board according to claim 4, wherein The reflector is provided with notches for welding to the radiation unit and the cable respectively.

6. The device for reducing the coupling effect of the circuit board according to claim 1, wherein, There is an insulating gasket between the ground of the circuit board and the reflector.

7. The device for reducing the coupling effect of a circuit board according to any one of claims 1 to 6, characterized in that The surface of the circuit board, excluding the welding area, is coated with insulating green oil.

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