Device and terminal for reducing USB interference to antenna

Abstract

The present invention provides a device and terminal for reducing USB interference to antennas, the device comprising a USB connector, a first interference reduction structure, and a PCB board; wherein the USB connector is assembled within the area where the first interference reduction structure is located; the first interference reduction structure is located on the surface layer of the surface layer of the PCB board, and is used to isolate the ground of the ground shell of the USB connector from the ground of the surface layer; the first interference reduction structure also includes a first grounding hole, through which the ground of the ground shell of the USB connector is connected to the reference main ground of the PCB board. The present invention also provides a terminal, which, by setting the first interference reduction structure, isolates the shell of the USB connector separately on the surface layer where the USB connector is located, and directly connects it to the reference main ground of the main ground layer, so that the integrity of the USB signal can be protected, and the interference generated during USB data transmission can be effectively suppressed, which can effectively improve the user experience and product performance.

Description

Technical Field

[0001] The embodiments of the present invention relate to, but are not limited to, the field of computer communication networks, and specifically, relate to, but are not limited to, a device and a terminal for reducing USB interference with antennas. Background Art

[0002] The USB interface is an important interface of the terminal, which is used for charging and transmitting data. The traditional USB transmission rate is low. The impact on the antenna is only the change of the antenna body ground after the USB interface is connected to the USB cable, which causes the antenna's standing wave ratio to shift. With the continuous improvement of the USB rate, after the USB cable is connected, it not only affects the antenna's standing wave, but also generates interference, resulting in a serious decrease in TIS (Total Isotropic Sensitivity). Summary of the invention

[0003] The embodiments of the present invention provide a device and terminal for reducing USB interference to an antenna, which mainly solve the technical problem that in the current related technology, after the USB interface is connected to a USB cable, there is standing wave influence and interference on the antenna, resulting in a serious decrease in TIS.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a device for reducing interference of USB to antenna, comprising a USB connector, a first interference reduction structure, and a PCB board;

[0005] The USB connector is mounted within the area where the first interference reduction structure is located;

[0006] The first interference reduction structure is located on the surface layer of the surface layer board of the PCB board, and is used to isolate the ground of the ground shell of the USB connector from the ground of the surface layer board;

[0007] The first interference reduction structure further includes a first grounding hole, through which the ground of the grounding shell of the USB connector is connected to the reference main ground of the PCB board.

[0008] An embodiment of the present invention further provides a terminal, wherein the terminal comprises the device for reducing USB interference to an antenna as described in any one of the above items.

[0009] The beneficial effects of the present invention are:

[0010] The present invention provides a device for reducing USB interference to an antenna, comprising a USB connector, a first interference reduction structure, and a PCB board; wherein the USB connector is assembled within the area where the first interference reduction structure is located; the first interference reduction structure is located on the surface layer of the surface layer board of the PCB board, and is used to isolate the ground of the ground shell of the USB connector from the ground of the surface layer board; the first interference reduction structure also includes a first grounding hole, through which the ground of the ground shell of the USB connector is connected to the reference main ground of the PCB board. By setting the first interference reduction structure, the shell of the USB connector is separately isolated on the surface layer where the USB connector is located, and is directly connected to the reference main ground of the main ground layer, which can not only protect the integrity of the USB signal, but also effectively suppress the interference generated during the USB data transmission process, which can effectively improve the user experience and improve the product performance.

[0011] Other features and corresponding beneficial effects of the present invention are described in the latter part of the specification, and it should be understood that at least part of the beneficial effects become obvious from the description in the specification of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of a device for reducing USB interference to an antenna provided in Embodiment 1 of the present invention;

[0013] Figure 2 A schematic diagram of another device for reducing USB interference to an antenna provided in the first embodiment of the present invention;

[0014] Figure 3 A schematic diagram of another device for reducing USB interference to an antenna provided in the first embodiment of the present invention;

[0015] Figure 4 A schematic diagram of a filter circuit device provided in Embodiment 1 of the present invention;

[0016] Figure 5 A schematic diagram of another device for reducing USB interference to an antenna provided in the first embodiment of the present invention;

[0017] Figure 6 A schematic diagram of another device for reducing USB interference to an antenna provided in the first embodiment of the present invention;

[0018] Figure 7 A schematic diagram of another device for reducing USB interference to an antenna provided in the first embodiment of the present invention; DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the following is a further detailed description of the embodiments of the present invention through specific implementation methods combined with the accompanying drawings. 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.

[0020] Embodiment 1:

[0021] See also Figure 1 , a device 100 for reducing USB interference with an antenna provided in this embodiment includes: a USB connector 101, a first interference reduction structure 102, and a PCB board 103;

[0022] The USB connector 101 is mounted within the area where the first interference reduction structure 102 is located;

[0023] The first interference reduction structure 102 is located on the surface layer of the surface layer board of the PCB board 103, and is used to isolate the ground of the ground shell of the USB connector 101 from the ground of the surface layer board;

[0024] The first interference reduction structure 102 further includes a first grounding hole 104 , through which the ground of the grounding shell of the USB connector 101 is connected to the reference main ground of the PCB board 103 .

[0025] The device for reducing USB interference with antenna provided in the embodiment of the present invention can be applied to various mobile terminals, including but not limited to mobile phones, wearable devices, data cards, vehicle terminals, UFI and other terminal devices that require USB connectors. In some embodiments, the device for reducing USB interference with antenna provided in the present invention can also be applied to any other device with USB connector, including but not limited to computer cases, USB strips, USB sockets, data cables, etc.

[0026] In some embodiments, the PCB board can be any layer, including but not limited to any order board such as a first-order board and a second-order board.

[0027] It should be noted that the forms of USB connectors include but are not limited to USB TYPE-A, USB TYPE-B, USBMICRO-A, USB TYPE-C and other USB connectors, and the standards supported by USB connectors include but are not limited to USB1.0, USB2.0, USB3.0, USB3.1 and other standards.

[0028] It should be noted that the number of USB connectors in the device for reducing USB interference with antenna provided in the embodiment of the present invention can be one or more, and is not limited here.

[0029] In addition, when there are multiple USB connectors, the types of the various USB connectors may be the same, or at least partially the same, or the types of the various USB connectors may be different. Similarly, when there are multiple USB connectors, the standards supported by the various USB connectors may be the same, or some of the standards supported by the USB connectors may be the same, or the standards supported by the various USB connectors may be different, which is not limited here. For example, there are three USB connectors in the device for reducing USB interference with antennas, namely USB TYPE-A and two USB TYPE-Bs.

[0030] When there are multiple USB connectors, the ground of the grounding shell of each USB connector is connected to the reference main ground through the first grounding hole. It should be noted that the first grounding hole can be one or more, and those skilled in the art can appropriately adjust the number of the first grounding holes according to actual needs.

[0031] In some embodiments, when the PCB board includes multiple layers, the layers are arranged sequentially from top to bottom, and the surface layers of the PCB board include at least one of the top layer and the bottom layer.

[0032] In some embodiments, the PCB board includes a layer of layer boards, and the layer boards are surface layer boards.

[0033] It should be noted that the surface layer of the PCB board includes the surface layer that is not connected to the other layers. Figure 2 When the PCB board includes 5 layers, from top to bottom, they are top layer 21, second layer 22, third layer 23, fourth layer 24, and bottom layer 25. The current surface layer is shown in the figure, which is the outer surface of the top layer. Of course, those skilled in the art can also use the outer surface of the bottom layer as the surface layer as needed.

[0034] It should be noted that, when the PCB board includes at least two layers, the reference main ground of the PCB board can select any layer as the reference main ground.

[0035] It should be noted that the shape of the first interference reduction structure is not limited in the embodiment of the present invention, and the shape of the first interference reduction structure includes but is not limited to any shape such as a circle, an ellipse, a square, an irregular shape, etc. In some embodiments, the shape of the first interference reduction structure can be determined according to the specific routing form of the PCB board. However, the area where the first interference reduction structure is located must be larger than the area required for the assembly of the USB connector.

[0036] In some embodiments, the first interference reduction structure includes a first hollowed-out position obtained by hollowing out the surface layer plate.

[0037] It should be noted that hollowing out means that the surface PCB is not covered with copper, that is, the PCB does not have wiring in the hollowed-out area, and the USB connector is not directly connected to the ground of the surface layer. The hollowed-out material can be a common PCB board, such as FR4. The hollowed-out material can also be other materials, which are not limited here.

[0038] In some embodiments, the first interference reduction structure also includes a first hollowed-out position obtained by hollowing out the surface layer plate, and the target insulating material is laid in the first hollowed-out position according to a preset rule.

[0039] In some embodiments, after the surface layer board is hollowed out, in order to better isolate the ground of the ground shell of the USB connector from the ground of the surface layer board, a target insulating material can be laid at the first hollowed-out position according to a preset rule.

[0040] It should be noted that the target insulating material can be various materials that can be used by those skilled in the art.

[0041] It should be noted that the preset rules include but are not limited to any of the following:

[0042] The entire first hollowed-out position is paved with the target insulating material, the target insulating material is paved within a preset range around each USB connector in the first hollowed-out position, the target insulating material is paved along the edge of the first hollowed-out position, etc.

[0043] In some embodiments, the first interference reduction structure further includes a filtering circuit and a feed point;

[0044] The feed points are respectively connected to the ground shell and the filter circuit of the USB connector;

[0045] The filter circuit is arranged along at least a portion of the edge of the first hollowed-out position;

[0046] The first grounding hole is a grounding hole of the filter circuit.

[0047] It should be noted that, according to actual needs, the filter circuit can be arranged around the first hollowed-out position, or can be arranged along a portion of the edge of the first hollowed-out position.

[0048] It should be noted that, in some embodiments, the filter circuit may be arranged along at least a portion of the edge of the first hollowed-out position, and the filter circuit may be arranged close to at least a portion of the edge of the first hollowed-out position, or the filter circuit may be arranged along at least a portion of the direction of the edge of the first hollowed-out position, but the filter circuit may not be close to the first hollowed-out position, but a certain distance may be left between the filter circuit and the first hollowed-out position.

[0049] See also Figure 3 , Figure 3A schematic diagram of another device for reducing USB interference to an antenna is provided, wherein a first interference reduction structure includes a first hollowed-out position 304, a filter circuit 301 and a feed point 302;

[0050] The feed point 302 is connected to the ground shell of the USB connector 303 and the filter circuit 301 respectively;

[0051] The filter circuit 301 is arranged around the first hollowed-out position 304;

[0052] The first grounding hole 305 is a grounding hole of the filter circuit 301 .

[0053] See also Figure 4 , Figure 4 A schematic diagram of a filter circuit device is provided, see Figure 4 As shown, the filter circuit is connected to the USB connector through the feed point 402 and connected to the reference main ground through the first ground hole 401 .

[0054] It should be noted that, taking USB3.0 as an example, when USB3.0 is working, the clock frequency of USB3.0 is 2.5G. As we all know, 2.4GHzˉ2.5GHz concentrates many communication standards, such as WIFI2.4G, Bluetooth, Zigbee, etc. At this time, if the USB connector is not well protected, it will inevitably affect WIFI, etc. The most intuitive display is the decrease of the TIS index of the antenna, the weakening of the wifi signal, and the decrease of the number of signal grids. The shape of the filter circuit is as follows: Figure 4 As shown, the interference around 2.5G can be effectively filtered. The filtering circuit can be implemented through the routing on the PCB. The line width can be appropriately adjusted according to the specific PCB board thickness, number of layers, and corresponding medium parameters. The requirements for different frequency bands on the terminal device, such as LTE's B7, B41 bands, and wifi 5G bands; and different USB interfaces, such as USB3.1, the clock frequency of USB3.1 is 5GHz, and the frequency band requirements for the USB connector's filtering circuit are different. It is determined according to the interface standard supported by the actual USB connector and the wireless frequency band that the terminal needs to support, which frequency band needs to be filtered. Therefore, the filtering circuit can be one group, or 2 groups, or any other group. The technicians in this field can set it according to the needs.

[0055] It should be noted that Figure 4 The device schematic diagram of the filter circuit in the figure is only an example of a microstrip line of a PCB routing. In some embodiments, it can also include but is not limited to an LC filter circuit built by resistor and capacitor components, a stripline filter circuit placed on an inner layer routing, etc.

[0056] In some embodiments, the feed point is connected to a ground pin of a ground shell of the USB connector.

[0057] It should be noted that the number of feed points matches the ground pin of the USB connector shell, which can be 1, 2, 3, or generally four. The feed points include but are not limited to at least one of the following: exposed copper, PCB traces, and shrapnel. Among them, the exposed copper, shrapnel, and PCB traces can be in any shape as long as they can ensure full contact and connection with the ground shell of the USB connector. If the device for reducing USB interference with antennas includes multiple USB connectors, the ground pins of each USB connector shell can be connected to the feed point in a star shape, or in a bus or ring shape.

[0058] In some embodiments, the first interference reduction structure further includes a second hollowed-out position obtained by hollowing out the surface layer plate;

[0059] The second hollowed-out positions are arranged around a target area, and the target area includes an area where the filter circuit is located and an area where the first hollowed-out positions are located.

[0060] See also Figure 5 , Figure 5 A schematic diagram of another device for reducing USB interference to an antenna is provided, wherein the device 500 for reducing USB interference to an antenna includes a PCB board 501, a USB connector 502, and a first interference reduction structure composed of a first hollowed-out position 503, a filter circuit 504, a first grounding hole 505, a second hollowed-out position 506, and a feed point 507;

[0061] Among them, the first interference reduction structure is located on the surface layer of the surface layer board of the PCB board 501, the USB connector 502 is assembled in the area where the first hollow position 503 is located, the feed point 507 is respectively connected to the filter circuit 504 and the USB connector 502, the first grounding hole 505 is the ground hole of the filter circuit 504, and the second hollow position 506 is arranged around the target area. It should be noted that the target area includes the area where the filter circuit 504 is located and the area where the first hollow position 503 is located.

[0062] It should be noted that the first hollowed-out position and the second hollowed-out position are obtained by hollowing out the surface layer board respectively.

[0063] In some embodiments, when the second cutout portion exists, the filter circuit may also be disposed along a portion of an edge of the first cutout portion.

[0064] In some embodiments, the PCB board includes a surface layer board, a main layer board, and at least one intermediate layer board;

[0065] The intermediate stratum is located between the surface stratum and the main stratum;

[0066] The middle layer board includes a second grounding hole, the first grounding hole is connected to the second grounding hole, and the ground of the grounding shell of the USB connector is connected to the reference main ground on the main ground layer board through the first grounding hole and the second grounding hole;

[0067] The middle layer board also includes a second interference reduction structure, which is arranged around the second grounding hole and is used to isolate the ground of the second grounding hole from the ground of other areas of the middle layer board.

[0068] It should be noted that the main ground layer is the layer where the preset reference main ground is located. When the PCB board includes four layers, if the surface layer is the top layer according to the stacking order of the layers, the main ground layer can be the bottom layer or the second to last layer. In other words, the main ground layer can be the bottom layer or any layer including the third layer from the surface layer to the inside, depending on which layer is determined as the reference main ground.

[0069] In some embodiments, the second interference reduction structure includes a third hollowed-out position obtained by hollowing out the middle layer board.

[0070] It should be noted that each second interference reduction structure corresponds to a second grounding hole, and each intermediate layer board includes at least one second grounding hole.

[0071] See also Figure 6 , Figure 6 A schematic diagram of another device for reducing USB interference with an antenna is provided, wherein the device 600 for reducing USB interference with an antenna includes a PCB board, a USB connector, and a first interference reduction structure consisting of a first hollowed-out position, a filter circuit, a first grounding hole 601, a second hollowed-out position, and a feed point;

[0072] The PCB board includes 6 layers, namely, a surface layer 61, a second layer 62, a third layer 63, a fourth layer 64, a fifth layer 65, and a bottom layer 66. The fourth layer 64 is selected as the reference main ground, and the fourth layer is the main ground layer, and the second layer 62 and the third layer 63 are the middle layers.

[0073] The second layer board 62 includes a second grounding hole A602 and a third hollowing position A605, and the third layer board 63 includes a second grounding hole B603 and a third hollowing position B604;

[0074] The USB connector 602 is connected to the filter circuit 604 through the feed point 603. The first grounding hole 601 is the ground hole of the filter circuit 604, which is connected to the second grounding hole A602 through the first grounding hole 601, and the second grounding hole B603 is further connected to the ground hole of the reference main ground on the main ground layer board 64. Since the second ground hole A602 and the second ground hole B603 are respectively surrounded by the third hollowing position A605 and the third hollowing position B604, the second ground hole A602 and the second ground hole B603 are respectively isolated from the ground of the layer board where they are located.

[0075] It should be noted that the shapes of the first interference reducing structure and the second interference reducing structure in the embodiment of the present invention are not limited in the present invention, including but not limited to circular, elliptical, square, irregular shapes, etc.

[0076] In some embodiments, the surface layer board further includes a third grounding hole, wherein the third grounding hole is located in a region outside the first interference reduction structure, and the ground of the surface layer board is connected to the reference main ground through the third grounding hole.

[0077] Continue to see Figure 6 The third grounding hole 606 is located outside the first interference reduction structure. In other words, the third grounding hole is located outside the second hollowing position on the surface of the surface layer plate. The second grounding hole 606 is connected to the ground hole of the second layer plate 62 and the ground hole of the third layer plate 63, and then further connected to the ground hole of the reference main ground on the main layer plate 64.

[0078] It should be noted that Figure 6 The position and number of the third grounding holes are merely schematically illustrated, and those skilled in the art may adjust the specific position and number of the third grounding holes according to actual needs.

[0079] The following is a further description of the device for reducing USB interference with antennas provided by the embodiment of the present invention through a specific embodiment. Figure 7 , Figure 7 A schematic diagram of another device for reducing USB interference to an antenna is provided, such as Figure 7 As shown:

[0080] For devices using USB connectors, the PCB motherboard takes a 6-layer board as an example (it should be noted that the actual terminal device can be any layer, such as 8 layers, 10 layers, etc.), where 71 is the top layer of the terminal device motherboard PCB, which is mainly used to place components, 72 is the second layer of the motherboard PCB, which is used for inner layer routing or reference ground, 73 is the third layer of the motherboard PCB, which is used for inner layer routing or reference ground, 74 is the fourth layer of the motherboard PCB, which is used for inner layer routing or reference ground, 75 is the fifth layer of the motherboard PCB, which is used for inner layer routing or reference ground, 76 is the bottom layer of the motherboard PCB, 701 is a USB connector, which can be a USB connector supporting USB1.0, USB2.0, USB3.0, USB3.1 and other standards, and the USB connector can be in the form of USB TYPE-A, USBTYPE-B, USB MICRO-A, USB TYPE-C, the second hollowed-out position 705 in the shaded part is a hollowed-out isolation zone between the USB connector 701 and the mainboard ground, which is used to isolate the ground shell of the USB connector 701 and the surface layer 71 of the PCB mainboard. The filter circuit 704 is used to filter out the interference generated by the corresponding USB clock signal. The feed point 703 is the connection feed point between the filter circuit 704 and the USB connector 701. The first grounding hole 706 is the grounding hole of the filter circuit 704. The second grounding hole A707, the second grounding hole B709, and the reference main grounding hole 711 are ground holes of the corresponding layers on the mainboard.

[0081] The specific implementation methods are as follows:

[0082] 1. The motherboard of the terminal device, that is, the PCB board, takes a 6-layer board as an example (it can be any layer, it can be a first-order board, a second-order board, or any-order board), top layer 71, second layer 72, third layer 73, fourth layer 74, fifth layer 75, bottom layer 76, and 74 is selected as the reference main ground. This embodiment takes 74 as the reference main ground for example. The motherboard of the actual terminal product can select any layer of the PCB as the reference main ground.

[0083] 2. Taking the USB connector 701 on the top surface as an example, it should be noted that the USB connector 701 can also be on the bottom surface. The USB connector 701 can be a USB connector such as USB TYPE-A, USB TYPE-B, USB MICRO-A, USB TYPE-C, etc. The shell of the USB connector 701 and the ground of the top layer 71 are isolated by the second hollowing position 705. The second hollowing position 705, that is, the shaded part, is the second hollowing position of the hollowing isolation area. In this embodiment, the schematic diagram of this area is an elliptical ring, which can actually be any shape. The shape is determined according to the specific routing form of the PCB board. It should be noted that hollowing means that the surface layer 71 PCB is not covered with copper, that is, the PCB does not have routing at the hollowed-out part, and the USB connector 701 is not directly connected to the ground of the top layer 71. The material after hollowing can be FR4 of the general PCB board, or other materials.

[0084] 3. Filter circuit 704, USB connector 701, connected to filter circuit 704 via feed point 703, the number of feed points 703 matches the ground pin of the shell of USB connector 701, which can be 1, 2, 3, generally four, and feed point 703 includes but is not limited to at least one of the following: exposed copper, PCB trace, spring. Among them, the exposed copper, spring and PCB trace can be in any shape, as long as they can ensure full contact and connection with the ground shell of USB connector 701. When multiple USB connectors are included, the shell ground pins of each USB connector 701 can be connected to the feed point 703 in a star shape, or in a bus shape or ring shape.

[0085] 4. The ground of the shell of the USB connector 701 is directly connected to the reference main ground grounding hole 711 through the first grounding hole 706. The first grounding hole 706 is connected to the second grounding hole A707 of the second layer 72, and the second grounding hole B709 of the third layer 73 is further connected to the reference main ground grounding hole 711 of the reference main ground 74. The second grounding hole A707 and the surrounding ground of the layer where it is located have a second interference reduction structure A708 for isolation, and the second grounding hole B709 and the surrounding ground of the layer where it is located have a second interference reduction structure B710 for isolation. The large circular holes and oblique line parts around the second grounding holes A707 and B709 indicate hollowing out for isolation. The hollowing shape can be any shape, not limited to the example circle of this embodiment, and can be square, elliptical, etc.

[0086] Take USB3.0 as an example. When USB3.0 is working, the clock frequency of USB3.0 is 2.5G. As we all know, 2.4GHzˉ2.5GHz concentrates many communication standards, such as WIFI2.4G, Bluetooth, Zigbee, etc. At this time, if the USB connector is not well protected, it will inevitably affect WIFI, etc. The most intuitive display is the decrease of TIS index of antenna, the weakening of wifi signal, and the decrease of signal grid number. The filter circuit can effectively filter the interference around 2.5G. The filter circuit can be realized through the routing on the PCB. According to the specific PCB board thickness, number of layers, and corresponding medium parameters, the line width can be appropriately adjusted. The requirements for different frequency bands on terminal devices, such as LTE's B7, B41 bands, and WiFi 5G bands; and different USB interfaces, such as USB3.1, whose clock frequency is 5GHz, have different frequency band requirements for the USB connector's filter circuit. The frequency band that needs to be filtered is determined based on the actual interface standard supported by the USB and the wireless frequency band that the terminal needs to support. The filter circuit can be one group, two groups, or any other group.

[0087] The filtering circuit includes but is not limited to at least one of the following: a microstrip line with PCB routing, an LC filtering circuit built with resistor and capacitor components, a stripline filtering circuit placed on the inner layer routing, etc.

[0088] It should be noted that all possible applications of the present invention are not limited to USB connectors, but may be other connectors such as headphone jacks.

[0089] In the current related technologies, the shell of the USB connector is directly connected to the surface PCB of the mainboard, and the connected surface ground is connected to other layers of ground through ground holes, and then connected to the main ground layer. The present invention sets a first interference reduction structure to isolate the shell of the USB connector separately on the surface layer where the USB connector is located. At the same time, the isolated first grounding hole is also isolated from the ground of other layers and is directly connected to the reference main ground of the main ground layer. This can not only protect the integrity of the USB signal, but also effectively suppress the interference generated during USB data transmission, which can effectively improve the user experience and improve product performance.

[0090] Furthermore, the first interference reduction structure also includes a filtering circuit, which effectively isolates the connection between the USB connector and other ground layers by connecting the outer shell of the USB connector to the filtering circuit and then connecting the isolated first grounding hole and the filtering circuit, thereby shielding the signal within the outer shell of the USB connector, avoiding interference caused by the USB clock signal, and coupling to various parts of the board through the surface grounding, especially the antenna part, thereby affecting the antenna's reception index, reducing TIS, resulting in a decrease in the receiving performance of the entire machine, deterioration in transmission quality, and a decrease in transmission rate.

[0091] The device for reducing USB interference with antenna provided by the present invention can be applied to all kinds of mobile terminals, such as mobile phones, wearable devices, data cards, vehicle-mounted devices, UFI products and other terminal devices with USB connectors, and is also applicable to any other devices suitable for USB connectors. When the USB connector is working, the device for reducing USB interference with antenna provided by the present invention can significantly improve or suppress the interference generated by the USB clock signal when the USB connector is working, such as charging, or USB high-speed data transmission. The influence of USB on antenna TIS is effectively reduced, the signal display of the user interface will not be significantly reduced, and the call quality and data transmission are greatly improved.

[0092] In addition, the device for reducing USB interference with antennas provided in the embodiment of the present invention can significantly improve USB interference, reduce USB data transmission, especially the interference caused by USB3.0 high-speed data transmission to LTE bands, WIFI bands, 5GNR bands, millimeter waves, etc., thereby improving user experience and satisfaction.

[0093] Embodiment 2:

[0094] This embodiment further provides a terminal, which includes the device for reducing USB interference to an antenna in any of the above embodiments.

[0095] The above contents are further detailed descriptions of the embodiments of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is 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 device for reducing USB interference to antenna, characterized in that: It includes a USB connector, a first interference reduction structure, and a PCB board; The USB connector is mounted within the area where the first interference reduction structure is located; The first interference reduction structure is located on the surface layer of the surface layer board of the PCB board, and is used to isolate the ground of the ground shell of the USB connector from the ground of the surface layer board; The first interference reduction structure further includes a first grounding hole, through which the ground of the grounding shell of the USB connector is connected to the reference main ground of the PCB board; The first interference reduction structure also includes a first hollowed-out position obtained by hollowing out the surface layer plate, and a target insulating material is laid in the first hollowed-out position according to a preset rule; The USB connector is installed in the area where the first hollowed-out position is located; The first interference reduction structure further includes a filter circuit and a feed point; the feed point is respectively connected to the ground shell of the USB connector and the filter circuit; The filter circuit is arranged along at least a portion of the edge of the first hollowed-out position; the first grounding hole is a grounding hole of the filter circuit; The first interference reduction structure also includes a second hollowed-out position obtained by hollowing out the surface layer plate; The second hollowed-out positions are arranged around a target area, and the target area includes the filter circuit and the first hollowed-out positions.

2. The device for reducing USB interference to antenna as claimed in claim 1, characterized in that: The feed point is connected to a ground pin of a ground shell of the USB connector.

3. The device for reducing USB interference to antenna according to any one of claims 1 to 2, characterized in that: The PCB board includes a surface layer board, a main layer board, and at least one intermediate layer board; The intermediate layer plate is located between the surface layer plate and the main layer plate; The intermediate layer board includes a second grounding hole, the first grounding hole is connected to the second grounding hole, and the ground of the grounding shell of the USB connector is connected to the reference main ground on the main ground layer board through the first grounding hole and the second grounding hole; The middle layer board also includes a second interference reduction structure, which is disposed around the second grounding hole and is used to isolate the ground of the second grounding hole from the ground of other areas of the middle layer board.

4. The device for reducing USB interference to antenna as claimed in claim 3, characterized in that: The second interference reduction structure includes a third hollowed-out position obtained by hollowing out the middle layer board.

5. The device for reducing USB interference to antenna according to any one of claims 1 to 2, characterized in that: The surface layer board also includes a third grounding hole, which is located in a region outside the first interference reduction structure, and the ground of the surface layer board is connected to the reference main ground through the third grounding hole.

6. A terminal, characterized in that: The terminal includes the device for reducing USB interference to an antenna as described in any one of claims 1-5.

Images