Lightning protection power supply system for active antenna

Abstract

The invention provides a lightning protection power supply system for an active antenna system. The lightning protection power supply system comprises a signal processing module and a direct current power supply, the system also comprises a lightning protection module and a voltage stabilization module. The lightning protection module is arranged in the coaxial cable, a first end of the lightning protection module is respectively connected with the direct current power supply and the signal processing module, and a second end of the lightning protection module is used for filtering energy generated by lightning surge; the third end of the lightning protection module is connected with the voltage stabilization module; the voltage stabilizing module is used for converting a voltage signal output by the lightning protection module and supplying power to the signal processing module; when lightning stroke surge occurs in the coaxial cable, the energy of the lightning stroke surge is shunted and discharged to the ground under the action of the lightning protection module. According to the invention, the lightning protection module and the voltage stabilization module are arranged in the coaxial cable, so that the lightning protection module quickly consumes the energy of lightning surge when the lightning surge occurs in the coaxial cable, thereby ensuring the normal power supply and operation of the post-stage signal processing module.

Description

Technical Field

[0001] The invention relates to the technical field of antenna lightning protection, and in particular to a lightning protection power supply system for an active antenna. Background Art

[0002] When a lightning strike occurs, a large lightning current flows between the lightning layer and the earth, causing a sudden change in the surrounding electromagnetic field. Due to electromagnetic induction, an induced current in the outdoor metal cable will be generated in a direction that offsets the change in the electromagnetic field, thus becoming an induced lightning surge and invading electronic equipment. The signal processing circuit in the active antenna requires an external power supply to work properly, and the antenna is generally connected with only one high-frequency cable, so the RF signal and the system power supply circuit need to share a coaxial cable. When a lightning strike occurs, the lightning surge will flow into the subsequent circuit in the active antenna along the coaxial cable, thereby damaging each module in the source antenna.

[0003] At present, the lightning protection design of antennas generally only relies on the role of external lightning induction devices, so that after the antenna is struck by lightning, the lightning energy can be fully introduced into the ground through lightning rods, etc., thereby reducing the impact of lightning on the antenna operation. Since active antennas are usually installed outdoors, they are easily struck by lightning during thunderstorms, and the lightning surge after passing through the coaxial cable is still very large. Therefore, a circuit that reduces lightning surge interference is urgently needed inside the active antenna system to protect the various modules inside the active antenna. Summary of the invention

[0004] In order to solve the problem described in the background art that after being struck by lightning, the lightning surge will damage various modules inside the active antenna, the present invention proposes the following technical solution:

[0005] A lightning protection power supply system for an active antenna system, including a signal processing module and a DC power supply; further comprising: a lightning protection module and a voltage stabilizing module; the lightning protection module is arranged in the coaxial cable, the first end of the lightning protection module is respectively connected to the DC power supply and the signal processing module, and the second end of the lightning protection module is used to filter out the energy generated by the lightning surge; the third end of the lightning protection module is connected to the voltage stabilizing module; the voltage stabilizing module is used to convert the voltage signal output by the lightning protection module and supply power to the signal processing module; when a lightning surge occurs in the coaxial cable, the energy of the lightning surge is shunted and discharged into the ground after being acted upon by the lightning protection module.

[0006] Wherein, the lightning protection module includes: a ceramic discharge tube and at least one protection diode; the ceramic discharge tube and each protection diode are connected in parallel with each other; one end of the ceramic discharge tube is grounded, and the other end of the ceramic discharge tube is connected to the DC power supply; one end of the protection diode is connected to the voltage stabilizing module; when the lightning surge appears in the coaxial cable, the ceramic discharge tube is turned on to discharge electricity, and a constant voltage area is formed on each protection diode, thereby consuming and suppressing the voltage energy generated by the lightning surge.

[0007] Furthermore, the lightning protection module also includes: a first inductor, a second inductor and a third inductor connected in series; the first inductor is arranged between the DC inductor and the ceramic discharge tube; the second inductor is arranged between the ceramic discharge tube and the protection diode; the third inductor is arranged between the voltage stabilizing module and the protection diode; when the lightning surge appears in the coaxial cable, the first inductor, the second inductor and the third inductor act separately to jointly consume the AC energy in the lightning surge.

[0008] Furthermore, the voltage stabilizing circuit includes: at least one input capacitor, a voltage stabilizing chip and at least one output capacitor; one end of the input capacitor is respectively connected to the protection diode and the power supply end of the voltage stabilizing chip, and the other end of the input capacitor is grounded; the ground end of the voltage stabilizing chip is grounded through an adjusting resistor; one end of the output capacitor is grounded, and the other end of the adjusting capacitor is connected to the output end of the voltage stabilizing chip.

[0009] Furthermore, the ceramic discharge tube and the protection diode are both unidirectionally conductive, and the conductive direction of the ceramic discharge tube is opposite to the conductive direction of the protection diode.

[0010] Furthermore, one end of the first inductor close to the DC power supply is connected to the output end of the signal processing module.

[0011] Furthermore, the signal processing module includes: an antenna, at least one filtering circuit, and at least one amplifying circuit; wherein the antenna is used to receive external signals and output corresponding radio frequency signals to the filtering circuit; each of the filtering circuits is used to filter out noise interference in the antenna or the amplifying circuit; each of the amplifying circuits is used to amplify and output the radio frequency signal after being acted upon by the filtering circuit, and the power supply end of each of the amplifying circuits is connected to the output end of the voltage regulator chip to maintain a normal operating state.

[0012] Beneficial effect: The present invention arranges a lightning protection module and a voltage stabilizing module in the coaxial cable, so that when a lightning surge occurs in the coaxial cable, the lightning protection module quickly consumes the energy of the lightning surge, thereby ensuring the normal power supply and operation of the subsequent signal processing module. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the structure of a mine boundary of a lightning protection power supply system for an active antenna provided according to an embodiment of the present invention;

[0014] Figure 2 A circuit structure diagram of a lightning protection module provided according to an embodiment of the present invention;

[0015] Figure 3 A circuit structure diagram of a voltage stabilizing module provided according to an embodiment of the present invention;

[0016] Figure 4 The present invention is a schematic diagram of a circuit structure of a signal processing module provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present application clearer, the present invention will be further described in detail below in conjunction 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.

[0018] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0019] Figure 1 A schematic diagram of the framework structure of a lightning protection power supply system for an active antenna provided according to an embodiment of the present invention.

[0020] Reference Figure 1According to an embodiment of the present invention, a lightning protection power supply system for an active antenna includes: a signal processing module that provides a radio frequency signal for the system output, and a DC power supply that supplies power for the system operation. A lightning protection power supply system for an active antenna of the present invention also includes: a lightning protection module and a voltage stabilizing module, wherein the lightning protection module is arranged in a coaxial cable and has three ports therein. The first end of the lightning protection module is respectively connected to a DC power supply and a signal processing module, and the second end of the lightning protection module is used to filter out the energy generated by a lightning surge. The third end of the lightning protection module is connected to the signal processing module. The voltage stabilizing module is used to convert the voltage signal output by the lightning protection module and supply power to the signal processing module. When a lightning surge occurs in the coaxial cable, the energy of the lightning surge is shunted and discharged into the ground after being acted upon by the lightning protection module. Among them, the coaxial cable is a common port for the lightning protection module, the DC power supply and the signal processing module, which provides a DC power supply for the operation of the signal processing module while providing an output channel for the radio frequency signal output by the antenna.

[0021] Figure 2 The present invention is a circuit structure diagram of a lightning protection module provided according to an embodiment of the present invention.

[0022] Specifically, refer to Figure 2 According to an embodiment of the present invention, a lightning protection module includes: a ceramic discharge tube, at least one protection diode, a first inductor, a second inductor and a third inductor. The ceramic discharge tube and each protection diode are connected in parallel, one end of the ceramic discharge tube is grounded, and the other end of the ceramic discharge tube is connected to a DC power supply through the first inductor. One end of the protection diode is connected to a voltage stabilizing module, and the other end of the protection diode is grounded. The second inductor is arranged between the ceramic discharge tube and the protection diode, and the third inductor is arranged between the voltage stabilizing module and the protection diode. When a lightning surge occurs in the coaxial cable, the ceramic discharge tube is vented and turned on, thereby discharging the instantaneous current generated by the lightning surge into the ground. A constant voltage area is formed on each protection diode to jointly suppress the instantaneous voltage energy generated by the lightning surge. The first inductor, the second inductor and the third inductor act separately to jointly consume the AC energy in the lightning surge.

[0023] In this embodiment, the number of protection diodes is two, and the third inductor is arranged between the two protection diodes connected in parallel. The conduction direction of each protection diode is the same, and the conduction direction of the ceramic discharge tube is opposite to the conduction direction of each protection diode. When there is no lightning surge in the coaxial cable, the ceramic discharge tube and each protection diode are not turned on, and the DC power supply is input into the voltage stabilizing module after passing through the first inductor, the second inductor and the third inductor connected in series.

[0024] Figure 3 The figure is a circuit structure diagram of a voltage stabilizing module provided according to an embodiment of the present invention.

[0025] Specifically, refer to Figure 3, a voltage stabilizing module according to an embodiment of the present invention includes: at least one input capacitor, a voltage stabilizing chip and at least one output capacitor. Among them, each input capacitor is connected in parallel with each other, and each output capacitor is connected in parallel with each other. One end of the input capacitor is respectively connected to the third capacitor and the power supply end of the voltage stabilizing chip, and the other end of the input capacitor is grounded. The ground end of the voltage stabilizing chip is grounded through an adjusting resistor. One end of the output capacitor is respectively connected to the output end of the signal processing module and the voltage stabilizing chip, and the other end of the output capacitor is grounded. In this embodiment, the number of input capacitors and output capacitors is two. In other embodiments, the number of input capacitors and output capacitors can be one, three or more.

[0026] When the voltage signal output by the lightning protection module enters the voltage stabilizing module, the input capacitor converts the unidirectional pulsating voltage in the lightning protection module into a DC voltage, thereby supplying power to the voltage stabilizing chip. The voltage stabilizing chip outputs the corresponding working voltage to the signal processing module according to the size of the adjusting resistor. The working voltage is suppressed from self-oscillation after adjustment by the output capacitor, thereby outputting a stable DC voltage to the signal processing module. In this embodiment, the ground terminal of the voltage stabilizing chip is grounded through an adjusting resistor R1, and an adjusting resistor R2 is provided between the ground terminal and the output terminal of the voltage stabilizing chip. The DC voltage output by the voltage stabilizing chip is determined by the adjusting resistor R1 and the adjusting resistor R2.

[0027] Figure 4 The present invention is a schematic diagram of a circuit structure of a signal processing module provided according to an embodiment of the present invention.

[0028] Specifically, refer to Figure 4 According to an embodiment of the present invention, the signal processing module includes an antenna, at least one filtering circuit and at least one amplifying circuit. The antenna receives an external signal and outputs a demodulated RF signal to the filtering circuit. Each filtering circuit respectively filters out the noise interference carried in the RF signal output by the amplifying circuit or the RF signal output by the antenna. Each amplifying circuit is used to amplify and output the RF signal after the action of the filtering circuit, and the power supply end of each amplifying circuit is connected to the output end of the voltage stabilizing chip to maintain a normal operating state. In order to enhance the filtering effect, a filtering circuit can be added after the first amplifying circuit. In this embodiment, there are three filtering circuits and two amplifying circuits.

[0029] Further, continue to refer to Figure 4In this embodiment, each filter circuit includes: a filter chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a filter inductor. Among them, one end of the first capacitor is respectively connected to the antenna and the IN pin (input pin) of the filter chip, and the other end of the first capacitor is grounded. One end of the second capacitor is connected to the OUT pin (output pin) of the filter chip and one end of the third capacitor, and the other end of the second capacitor is grounded. The other end of the third capacitor is connected to one end of the filter inductor. One end of the fourth capacitor is respectively connected to the other end of the filter inductor and the RF input end of the amplifier circuit, and the other end of the fourth capacitor is grounded. The remaining pins of the filter chip are all grounded.

[0030] Further, continue to refer to Figure 4 In this embodiment, each amplifier circuit includes: an amplifier chip, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor and a fourth inductor. Among them, the first pin and the second pin of the amplifier chip are grounded, the RF input pin of the amplifier chip is connected to one end of the fourth capacitor, and the VDD pin (power pin) and SHDN pin (enable pin) of the amplifier chip are connected to the output end of the voltage stabilizing chip. One end of the network formed by the fifth capacitor, the sixth capacitor and the seventh capacitor in parallel is grounded, and the other end is connected to the VDD pin (power pin) of the amplifier chip. The RFOUT pin (RF output pin) of the amplifier chip is grounded through the eighth capacitor. One end of the eighth capacitor is respectively connected to the RFOUT pin (RF output pin) of the amplifier chip and one end of the fourth inductor, and the other end of the eighth capacitor is grounded. The other end of the fourth inductor is respectively connected to one end of the ninth capacitor and one end of the tenth capacitor. The other end of the ninth capacitor is grounded, and the other end of the tenth capacitor is respectively connected to one end of the eleventh capacitor and the IN pin (input pin) of the filter chip. The other end of the eleventh capacitor is grounded.

[0031] After passing through each filter circuit and each amplifier circuit, the components of the RF signal output by the antenna that are outside the antenna operating frequency are filtered out as noise, and the components within the antenna operating frequency are amplified and output. The amplifier circuit has two filter circuits located between the antenna and the amplifier circuit, or between the amplifier circuits.

[0032] In summary, the present invention arranges a lightning protection module and a voltage stabilizing module in the coaxial cable, so that when a lightning surge occurs in the coaxial cable, the lightning protection module quickly consumes the energy of the lightning surge, thereby ensuring the normal power supply and operation of the subsequent signal processing module.

[0033] The foregoing describes certain embodiments of the invention. Other embodiments are within the scope of the following claims.

[0034] The terms "exemplary," "example," and the like used throughout this specification mean "used as an example, instance, or illustration" and do not mean "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques can be implemented without these specific details. In some instances, in order to avoid obscuring the concepts of the described embodiments, well-known structures and devices are shown in block diagram form.

[0035] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0036] The above description of the contents of this specification is provided to enable any person of ordinary skill in the art to implement or use the contents of this specification. Various modifications to the contents of this specification will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of protection of the contents of this specification. Therefore, the contents of this specification are not limited to the examples and designs described herein, but are consistent with the widest range of principles and novel features disclosed herein.

Claims

1. A lightning protection power supply system for an active antenna system, comprising a signal processing module and a DC power supply; the lightning protection power supply system also includes: Lightning protection module and voltage stabilization module; The lightning protection module is arranged in the coaxial cable, the first end of the lightning protection module is respectively connected to the DC power supply and the signal processing module, the second end of the lightning protection module is used to filter out the energy generated by the lightning surge; the third end of the lightning protection module is connected to the voltage stabilizing module; the voltage stabilizing module is used to convert the voltage signal output by the lightning protection module and supply power to the signal processing module; when a lightning surge occurs in the coaxial cable, the energy of the lightning surge is diverted and discharged into the ground after being acted upon by the lightning protection module.

2. A lightning protection power supply system for active antenna according to claim 1, characterized in that: The lightning protection module includes: a ceramic discharge tube and at least one protection diode; the ceramic discharge tube and each protection diode are connected in parallel with each other; one end of the ceramic discharge tube is grounded, and the other end of the ceramic discharge tube is connected to the DC power supply; one end of the protection diode is connected to the voltage stabilizing module; when the lightning surge appears in the coaxial cable, the ceramic discharge tube is turned on to discharge electricity, and a constant voltage area is formed on each protection diode, thereby consuming and suppressing the voltage energy generated by the lightning surge.

3. A lightning protection power supply system for active antenna according to claim 2, characterized in that: The lightning protection module also includes: a first inductor, a second inductor and a third inductor connected in series; the first inductor is arranged between the DC inductor and the ceramic discharge tube; the second inductor is arranged between the ceramic discharge tube and the protection diode; the third inductor is arranged between the voltage stabilizing module and the protection diode; when the lightning surge appears in the coaxial cable, the first inductor, the second inductor and the third inductor act separately to jointly consume the AC energy in the lightning surge.

4. A lightning protection power supply system for active antennas according to claim 3, characterized in that: The voltage stabilizing circuit includes: at least one input capacitor, a voltage stabilizing chip and at least one output capacitor; one end of the input capacitor is respectively connected to the protection diode and the power supply end of the voltage stabilizing chip, and the other end of the input capacitor is grounded; the ground end of the voltage stabilizing chip is grounded through an adjusting resistor; one end of the output capacitor is grounded, and the other end of the adjusting capacitor is connected to the output end of the voltage stabilizing chip.

5. A lightning protection power supply system for active antenna according to claim 2, characterized in that: The ceramic discharge tube and the protection diode are both unidirectionally conductive, and the conductive direction of the ceramic discharge tube is opposite to the conductive direction of the protection diode.

6. A lightning protection power supply system for active antenna according to claim 3, characterized in that: One end of the first inductor close to the DC power supply is connected to the output end of the signal processing module.

7. A lightning protection power supply system for active antenna according to claim 4, characterized in that: The signal processing module includes: an antenna, at least one filtering circuit, and at least one amplifying circuit; Among them, the antenna is used to receive external signals and output corresponding radio frequency signals to the filtering circuit; each filtering circuit is used to filter out noise interference in the antenna or the amplifying circuit; each amplifying circuit is used to amplify and output the radio frequency signal after being acted upon by the filtering circuit, and the power supply end of each amplifying circuit is connected to the output end of the voltage stabilizing chip to maintain a normal operating state.

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