Antistatic RF Port and Wireless Communication Device

Abstract

The present invention provides an anti-static RF port and a wireless communication device. The anti-static RF port includes an RF antenna interface, a discharge circuit connected to the RF antenna interface, and an isolated island discharge module spaced apart from the RF antenna interface by a preset distance. The RF antenna interface is used to connect an RF antenna outside the wireless communication device. One end of the discharge circuit is connected to the RF antenna interface, and the other end is grounded, and is used to discharge the static electricity energy in the RF main path, and the RF main path is a path connecting the RF antenna interface and the signal transceiver module. One end of the isolated island discharge module is connected to the metal layer of the casing, and the other end is grounded, and is used to discharge the static electricity energy in the air near the RF antenna interface and on the PCB board. The anti-static RF port of the present invention can improve the integrity of RF signal transmission of the wireless communication device through a multi-stage static electricity protection RF port, and avoid the fault problems brought by static electricity to the wireless communication device.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and more particularly, to an anti-static radio frequency port and a wireless communication device. Background Art

[0002] At present, in order to improve the transmission power and signal interference of wireless communication devices, external radio frequency antennas are often used. For example, in specific industry application requirements of communication devices such as small cell base stations, wifi, vehicle-mounted, and GPS, metal rod-shaped vehicle-mounted whip radio frequency antennas and spring radio frequency antennas are often used. Such external radio frequency antennas are directly exposed to the air, and strong electrostatic and induced lightning and other strong surge impact currents are directly introduced into the device through the exposed antenna, which is likely to cause internal radio frequency devices of the device, resulting in incomplete radio frequency signal transmission and seriously affecting the operation of the wireless communication device. Summary of the Invention

[0003] In view of the above problems, the present invention provides an anti-static radio frequency port and a wireless communication device, so as to improve the integrity of radio frequency signal transmission of the wireless communication device through a radio frequency port with multi-stage electrostatic protection and avoid the failure problems brought by static electricity to the wireless communication device.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An anti-static radio frequency port includes a radio frequency antenna interface, a discharge circuit connected to the radio frequency antenna interface, and an island discharge module spaced from the radio frequency antenna interface by a preset distance;

[0006] The radio frequency antenna interface is used to connect to a radio frequency antenna outside the wireless communication device;

[0007] One end of the discharge circuit is connected to the radio frequency antenna interface, and the other end is grounded, and is used to discharge the electrostatic energy in the radio frequency main path, and the radio frequency main path is a path connecting the radio frequency antenna interface and the signal transceiver module;

[0008] One end of the island discharge module is connected to the metal layer of the chassis, and the other end is grounded, and is used to discharge the electrostatic energy in the air near the radio frequency antenna interface and on the PCB board.

[0009] Preferably, in the anti-static radio frequency port, the discharge circuit includes a first discharge resistor and a microstrip line;

[0010] One end of the first discharge resistor is connected to the radio frequency main path, and the other end is grounded;

[0011] One end of the microstrip line is connected to the radio frequency main path, and the other end is grounded.

[0012] Preferably, in the anti-static radio frequency port, the bleeder resistor is connected in parallel with the microstrip line.

[0013] Preferably, in the anti-static radio frequency port, the length range of the microstrip line is 0.95 times to 1.05 times the quarter wavelength of the operating frequency of the radio frequency port.

[0014] Preferably, in the anti-static radio frequency port, the impedance of the microstrip line is equal to the impedance of the main radio frequency path.

[0015] Preferably, in the anti-static radio frequency port, the radio frequency antenna interface, the bleeder circuit and the island bleeder module are arranged on the PCB board, and the microstrip line PCB board layer is a hollowed-out layer.

[0016] Preferably, in the anti-static radio frequency port, the distance between the microstrip line and other metal lines on the PCB board is greater than 3W of the microstrip line width.

[0017] Preferably, in the anti-static radio frequency port, the island bleeder module includes a conductive screw hole, a second bleeder resistor and a bleeder capacitor;

[0018] The conductive screw hole is in the shape of an island, and is spaced from the radio frequency antenna interface by a preset distance. The PCB board provided with the radio frequency antenna interface is fixed to the metal layer of the chassis by using a conductive screw through the conductive screw hole;

[0019] One end of the second bleeder resistor is connected to the conductive screw hole, and the other end is grounded;

[0020] One end of the bleeder capacitor is connected to the conductive screw hole, and the other end is grounded.

[0021] Preferably, in the anti-static radio frequency port, the conductive screw hole is surrounded by an electrical isolation groove.

[0022] The present invention also provides a wireless communication device, including the anti-static radio frequency port.

[0023] The present invention provides an anti-static radio frequency port, which includes a radio frequency antenna interface, a discharge circuit connected to the radio frequency antenna interface, and an island discharge module spaced a preset distance from the radio frequency antenna interface; the radio frequency antenna interface is used to connect a radio frequency antenna outside a wireless communication device; one end of the discharge circuit is connected to the radio frequency antenna interface, and the other end is grounded, and is used to discharge static electricity energy in a radio frequency main path, and the radio frequency main path is a path connecting the radio frequency antenna interface and a signal transceiver module; one end of the island discharge module is connected to a chassis metal layer, and the other end is grounded, and is used to discharge static electricity energy in the air near the radio frequency antenna interface and on a PCB board. The anti-static radio frequency port of the present invention can guide the static electricity energy on the radio frequency main path to be discharged through the discharge circuit, and can discharge the static electricity energy in the air near the radio frequency antenna interface through the island discharge module, so as to form an anti-static barrier. The radio frequency port with multi-stage static electricity protection can improve the integrity of radio frequency signal transmission of a wireless communication device and avoid the fault problems brought by static electricity to the wireless communication device.

[0024] To make the above objects, features and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes detailed descriptions as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the protection scope of the present invention. In each drawing, similar components are numbered similarly.

[0026] Figure 1 is a schematic structural diagram of an anti-static radio frequency port provided in Embodiment 1 of the present invention;

[0027] Figure 2 is a schematic structural diagram of an anti-static radio frequency port provided in Embodiment 2 of the present invention;

[0028] Figure 3 is a schematic structural diagram of an anti-static radio frequency port provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.

[0030] The components of the embodiments of the present invention that are usually described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0031] Hereinafter, the terms "comprising", "having" and their cognates that can be used in various embodiments of the present invention are only intended to represent specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be construed as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items or precluding the possibility of adding one or more features, numbers, steps, operations, elements, components or combinations of the foregoing items.

[0032] In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0033] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as those defined in a commonly used dictionary) will be construed to have the same meaning as the contextual meaning in the relevant technical field and will not be construed to have an idealized meaning or an overly formal meaning unless clearly defined in the various embodiments of the present invention.

[0034] Embodiment 1

[0035] Figure 1 It is a schematic structural diagram of an anti-static radio frequency port provided by Embodiment 1 of the present invention.

[0036] The anti-static radio frequency port 100 includes a radio frequency antenna interface 110, a discharge circuit 120 connected to the radio frequency antenna interface 110, and an island discharge module 130 spaced a preset distance from the radio frequency antenna interface 110;

[0037] The radio frequency antenna interface 110 is used to connect a radio frequency antenna 101 outside the wireless communication device;

[0038] In an embodiment of the present invention, the radio frequency antenna interface 110 in a wireless communication device is a port for converting electric field energy and magnetic field energy. The radio frequency antenna interface 110 is used to connect to an external antenna of the wireless communication device, and includes a conductive and highly sensitive radio frequency feeder connector, and a radio frequency feeder pin exposed outside the wireless communication device. Since the wireless communication device operates in a complex external environment and needs to connect various external radio frequency antennas 101 of different qualities, static electricity mainly comes from the external environment of the wireless communication device and the external radio frequency antenna 101. The static electricity is transmitted to the inside of the wireless communication device through the radio frequency antenna interface connected to the external radio frequency antenna 101, thereby affecting components and modules such as semiconductors and chips inside the wireless communication device. Therefore, the radio frequency antenna interface 110 of this wireless communication device, that is, the radio frequency port, needs effective static electricity protection.

[0039] One end of the discharge circuit 120 is connected to the radio frequency antenna interface 110, and the other end is grounded, and is used to discharge the static electricity energy in the radio frequency main path. The radio frequency main path 102 is a path connecting the radio frequency antenna interface 110 and the signal transceiver module 103;

[0040] In an embodiment of the present invention, a signal transceiver module 103 is provided in the wireless communication device. The signal transceiver module 103 is connected to the radio frequency antenna interface 110 through the radio frequency main path 102, and thus is connected to an external radio frequency antenna 101 through the radio frequency antenna interface 110 to receive the signal of the radio frequency antenna 101 and transmit the signal to the radio frequency antenna 101. Since the radio frequency antenna 101 and part of the radio frequency antenna interface 110 are exposed outside the wireless communication device, they will be affected by static electricity. After the radio frequency antenna 101 receives the static electricity in the air, it will transmit the static electricity energy to the signal transceiver module 103 through the radio frequency antenna interface 110 and the radio frequency main path 102, thereby easily causing a failure of the signal transceiver module 103.

[0041] In an embodiment of the present invention, a branch for guiding the discharge of static electricity energy may be provided on the radio frequency main path 102, that is, the above-mentioned discharge circuit 120. The discharge circuit 120 may be directly connected to the radio frequency antenna interface 110, or may be connected to a preset position on the radio frequency main path 102, and is mainly used to discharge the static electricity energy on the radio frequency main path 102. Its connection layout is limited by the layout of the PCB board and is not limited here. Among them, the grounding end of the discharge circuit 120 presents an infinite impedance to the electromagnetic signal of the radio frequency main path 102, thereby reducing the attenuation of the electromagnetic signal on the radio frequency main path 102 by the discharge circuit 120.

[0042] One end of the isolated island discharge module 130 is connected to the metal layer of the chassis, and the other end is grounded, and is used to discharge the static electricity energy in the air near the radio frequency antenna interface 110 and on the PCB board.

[0043] In the embodiment of the present invention, the above-mentioned island discharge module 130 can also be arranged on the PCB board of the RF port. It has an island structure and is electrically isolated from the conductive wires and components on the PCB board. When necessary, a groove can be dug around the island discharge module 130 to increase isolation. The island discharge module 130 is connected to the metal layer of the housing of the wireless communication device through contact and is connected to the ground terminal of the wireless communication device, so as to discharge the static electricity energy on the metal layer of the housing in advance. The island discharge module 130 is spaced from the RF antenna interface 110 by a preset distance. The shorter the preset distance, the better, so as to discharge the static electricity energy in the air near the RF antenna interface 110 and form a static electricity barrier for the metal layer of the housing near the RF antenna interface 110.

[0044] In the embodiment of the present invention, the discharge circuit 120 can guide the discharge of the static electricity energy on the RF main path 102, and the island discharge module 130 can discharge the static electricity energy in the air near the RF antenna interface 110. At the same time, the static electricity that may be introduced from the RF antenna interface to the ground of the PCB can be quickly discharged, thereby forming an anti-static barrier. The RF port with multi-stage static electricity protection can improve the integrity of the RF signal transmission of the wireless communication device and avoid the failure problems brought by static electricity to the wireless communication device.

[0045] Embodiment 2

[0046] Figure 2 It is a schematic structural diagram of an anti-static RF port provided by Embodiment 2 of the present invention.

[0047] The anti-static RF port 200 includes an RF antenna interface 210, a discharge circuit 220 connected to the RF antenna interface 210, and an island discharge module 230 spaced from the RF antenna interface 210 by a preset distance;

[0048] The RF antenna interface 210 is used to connect an RF antenna outside the wireless communication device;

[0049] One end of the discharge circuit 220 is connected to the RF antenna interface 210, and the other end is grounded, and is used to discharge the static electricity energy in the RF main path. The RF main path is the path connecting the RF antenna interface 210 and the signal transceiver module;

[0050] One end of the island discharge module 230 is connected to the metal layer of the housing, and the other end is grounded, and is used to discharge the static electricity energy in the air near the RF antenna interface 210 and on the PCB board.

[0051] In the embodiment of the present invention, the discharge circuit 220 includes a first discharge resistor 221 and a microstrip line 222; one end of the first discharge resistor 221 is connected to the RF main path, and the other end is grounded; one end of the microstrip line 222 is connected to the RF main path, and the other end is grounded.

[0052] In the embodiment of the present invention, in the above-mentioned discharge circuit 220, the discharge resistor is connected in parallel with the microstrip line 222, and the microstrip line 222 is used to isolate the radio frequency signal and discharge the electrostatic energy in the first stage. Among them, the microstrip line 222 has a wide and short line diameter. When the radio frequency antenna interface 210 receives a strong electrostatic surge transmitted on the radio frequency antenna, the electrostatic surge current on the radio frequency main path can be quickly introduced into the earth through the microstrip line 222 to prevent the electrostatic surge from further spreading inside the wireless communication device. The first discharge resistor 221 connected in parallel with the microstrip line 222 further quickly introduces the residual electrostatic charge on the microstrip line 222 into the earth in a very short time, thereby forming a secondary discharge. Among them, the resistance value of the first discharge resistor 221 is relatively large. In addition to discharging the residual electrostatic charge, it can also limit the current and embed the residual static electricity of the radio frequency antenna interface 210, and form an effective electrostatic protection for the signal receiving module at the back end and the radio frequency device sensitive to static electricity.

[0053] In the embodiment of the present invention, the length of the microstrip line 222 is in the range of 0.95 to 1.05 times of a quarter wavelength of the operating frequency of the RF port. The impedance of the microstrip line 222 is equal to the impedance of the RF main path. The RF antenna interface 210, the discharge circuit 220 and the island discharge module 230 are arranged on a PCB board, and the PCB board layer of the microstrip line 222 is a hollow layer, and is hollowed out as much as possible.

[0054] In an embodiment of the present invention, the above-mentioned microstrip line 222 can be a microstrip line 222 with a length of one-quarter wavelength of the operating frequency of the electromagnetic wave signal in the RF main channel. For example, when the above-mentioned operating frequency is 3 GHz, the length of the microstrip line 222 is 2.5 cm. Due to the influence of factors such as manufacturing process, dielectric constant of the PCB board, and tangent loss angle, in fact, the impedance of the microstrip line 222 may not be infinite at the grounding end, resulting in attenuation of the RF main path signal. In order to make the impedance of the microstrip line 222 infinite, it is designed according to the actual specific PCB parameters of the PCB manufacturer during design. At the same time, all layers under the microstrip line are hollowed out to reduce crosstalk generated by spatial radiation, and the width of the microstrip line 222 is increased as much as possible to improve its current-carrying capacity. So that the operating electromagnetic wave signal of the RF main path has an infinite impedance at the grounding end of the microstrip line 222, thereby reducing the RF power loss of the RF main path as much as possible. The PCB layer of the microstrip line 222 is a hollow layer, that is, the PCB board material at the corresponding position of the microstrip line 222 is hollowed out during PCB manufacturing, and the distance between the microstrip line 222 and other metal lines on the PCB board is greater than 3W of the microstrip line width.

[0055] Embodiment 3

[0056] Figure 3 It is a schematic structural diagram of an anti-static RF port provided in Embodiment 3 of the present invention.

[0057] The anti-static RF port 300 includes an RF antenna interface 310, a discharge circuit 320 connected to the RF antenna interface 310, and an island discharge module 330 spaced from the RF antenna interface 310 by a preset distance;

[0058] The RF antenna interface 310 is used to connect an RF antenna outside the wireless communication device;

[0059] One end of the discharge circuit 320 is connected to the RF antenna interface 310, and the other end is grounded, and is used to discharge the static electricity energy in the RF main path, and the RF main path is a path connecting the RF antenna interface 310 and the signal transceiver module;

[0060] One end of the island discharge module 330 is connected to the metal layer of the chassis, and the other end is grounded, and is used to discharge the static electricity energy in the air near the RF antenna interface 310 and on the PCB board.

[0061] The island discharge module 330 includes a conductive screw hole 331, a second discharge resistor 332, and a discharge capacitor 333;

[0062] The conductive screw hole 331 is spaced from the RF antenna interface 310 by a preset distance. A conductive screw is used to fix the PCB board provided with the RF antenna interface 310 to the metal layer of the casing through the conductive screw hole 331;

[0063] One end of the second discharge resistor 332 is connected to the conductive screw hole 331, and the other end is grounded;

[0064] One end of the discharge capacitor 333 is connected to the conductive screw hole 331, and the other end is grounded.

[0065] The conductive screw hole 331 is surrounded by an electrical isolation groove.

[0066] In the embodiment of the present invention, the second discharge resistor 332 and the discharge capacitor 333 are connected in parallel to form a discharge resistor-capacitor. The second discharge resistor 332 can be a resistor with a relatively large resistance value. The resistor-capacitor network formed by the second discharge resistor 332 and the discharge capacitor 333 is on the same straight line as the conductive screw hole 331 and the RF antenna interface 310, ensuring the shortest discharge path, and there is no other wiring on this discharge path, avoiding passing through electrostatically sensitive components and forming an island structure. Moreover, some small holes can be added on this discharge path to reduce the impedance. Among them, the above-mentioned discharge capacitor 333 is a high-voltage-resistant capacitor.

[0067] In the embodiment of the present invention, multiple layers of electrostatic protection can be formed through the discharge circuit 320 and the island discharge module 330, making the anti-static ability of the wireless communication device more stable, meeting the industrial-grade standard, improving the integrity of the RF signal transmission of the wireless communication device, and having the advantages of simple structure, small occupied area, and low manufacturing cost.

[0068] In addition, the present invention also provides a wireless communication device, which includes the above-mentioned anti-static RF port.

[0069] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architectures, functions, and operations of devices, methods, and computer program products according to multiple embodiments of the present invention. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the block may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the structure diagram and / or flowchart, as well as the combination of blocks in the structure diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0070] In addition, each functional module or unit in various embodiments of the present invention may be integrated together to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.

[0071] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An anti-static RF port, characterized in that, it includes an RF antenna interface, a discharge circuit connected to the RF antenna interface, and an island discharge module spaced a preset distance from the RF antenna interface; the RF antenna interface is used to connect an RF antenna outside the wireless communication device; one end of the discharge circuit is connected to the RF antenna interface and the other end is grounded, and is used to discharge the static electricity energy in the RF main path, and the RF main path is the path connecting the RF antenna interface and the signal transceiver module; one end of the island discharge module is connected to the metal layer of the chassis and the other end is grounded, and is used to discharge the static electricity energy in the air near the RF antenna interface and on the PCB board; wherein, the discharge circuit includes a first discharge resistor and a microstrip line; the discharge resistor is connected in parallel with the microstrip line; one end of the first discharge resistor is connected to the RF main path and the other end is grounded; one end of the microstrip line is connected to the RF main path and the other end is grounded; the RF antenna interface, the discharge circuit and the island discharge module are arranged on the PCB board, and the microstrip line PCB board layer is a hollowed-out layer; the distance between the microstrip line and other metal lines on the PCB board is greater than 3W of the microstrip line width.

2. The anti-static RF port according to claim 1, characterized in that, the length range of the microstrip line is 0.95 times to 1.05 times of a quarter wavelength of the operating frequency of the RF port.

3. The anti-static RF port according to claim 1, characterized in that, the impedance of the microstrip line is equal to the impedance of the RF main path.

4. The anti-static RF port according to claim 1, characterized in that, the island discharge module includes a conductive screw hole, a second discharge resistor and a discharge capacitor; the conductive screw hole is in the shape of an island and is spaced a preset distance from the RF antenna interface, and the PCB board provided with the RF antenna interface is fixed to the metal layer of the chassis by using a conductive screw through the conductive screw hole; one end of the second discharge resistor is connected to the conductive screw hole and the other end is grounded; one end of the discharge capacitor is connected to the conductive screw hole and the other end is grounded.

5. The anti-static RF port according to claim 4, characterized in that, the conductive screw hole is surrounded by an electrical isolation groove.

6. A wireless communication device, characterized in that, it includes the anti-static RF port according to any one of claims 1 to 5 above.

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