Radio frequency device and communication equipment

Abstract

The embodiment of the invention provides a radio frequency device and communication equipment, and belongs to the technical field of communication equipment. The radio frequency device comprises a first power supply and a load unit. The first power supply is used for providing direct current output by the second power supply to the load unit. The first power supply comprises a power supply device and a protection element, the input end of the power supply device is connected with the output end of the second power supply, the grounding end of the power supply device is connected with the output end of the protection element, and the input end of the protection element is connected with the grounding end of the second power supply. The protection element comprises a conductive conductor part, and the conductor part is used for fusing when the current passing through the protection element is larger than a preset value. According to the radio frequency device and the communication equipment provided by the embodiment of the invention, the radio frequency device can be protected through the protection element when the first power supply and the second power supply are reversely connected so as to ensure normal use of the communication equipment.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of communication equipment, and in particular to a radio frequency device and a communication equipment. Background Art

[0002] Typically, a communication device (such as a base station) includes a power supply and a load unit. The load unit may be a radio frequency remote unit or an active antenna unit, etc. The power supply is used to convert alternating current into direct current and provide the direct current to the load unit to achieve normal operation of the load unit.

[0003] In the related art, the power supply includes a first power supply and a second power supply, the first power supply is used to provide the direct current output by the second power supply to the load unit, the second power supply is used to convert the alternating current into direct current, the output end of the first power supply is used to be connected to the load unit, the positive input end of the first power supply is connected to the positive output end of the second power supply, the negative input end of the second power supply is connected to the negative output end of the second power supply, and the input end of the second power supply is used to receive alternating current.

[0004] However, when the positive input terminal and the negative input terminal of the first power supply are reversely connected with the positive output terminal and the negative output terminal of the second power supply and powered on, a large short-circuit current will be generated, which will affect the normal use of the communication equipment. Summary of the invention

[0005] The embodiments of the present application provide a radio frequency device and a communication device, which can protect the radio frequency device when a first power source and a second power source are reversely connected, so as to ensure normal use of the communication device.

[0006] In a first aspect, the present application provides a radio frequency device, comprising a first power supply and a load unit. The first power supply is used to provide the direct current output by the second power supply to the load unit. The first power supply includes a power supply device and a protection element, the input end of the power supply device is used to be connected to the output end of the second power supply, the ground end of the power supply device is used to be connected to the output end of the protection element, and the input end of the protection element is used to be connected to the ground end of the second power supply. The protection element includes a conductive conductor portion, and the conductor portion is used to fuse when the current passing through the protection element is greater than a preset value.

[0007] The input end of the protection element is connected to the output end of the second power supply, and the input end of the power supply device is connected to the ground end of the second power supply, so that the first power supply and the second power supply are reversely connected. After the radio frequency device is powered on, the output end of the second power supply and the ground end of the power supply device are short-circuited to form a large current, until the current passing through the protection element exceeds the preset value and the conductor part is melted, so that the loop current is zero, thereby avoiding the problem of carbonization of the radio frequency device due to the short-circuit current, and then ensuring the normal use of the radio frequency device. In addition, the use of protection elements to achieve reverse connection protection can also reduce DC loss.

[0008] In a possible implementation manner, the protection element is a fuse or a fuse.

[0009] The radio frequency device provided in the embodiment of the present application uses a fuse or a fuse as a protection element, which can prevent the radio frequency device from carbonizing after the first power supply and the second power supply are connected reversely. In addition, since the fuse or the fuse is a part in the prior art, the cost of the protection element can be reduced.

[0010] In a possible implementation, the first power supply also includes a current detection circuit, wherein a current input terminal of the current detection circuit is connected to an output terminal of the protection element, a current output terminal of the current detection circuit is used to be connected to a ground terminal of the power supply device, and the current detection circuit is used to detect the magnitude of a current passing through the protection element.

[0011] The radio frequency device provided in the embodiment of the present application connects the ground terminal of the power supply device and the output terminal of the protection element through a current detection circuit, and can detect the current passing through the protection element. Therefore, it can be determined whether the protection element is abnormal or whether the connection between the first power supply and the second power supply is good based on the detected current size, thereby ensuring the normal use of the radio frequency device.

[0012] In a possible implementation, the current detection circuit includes a collection circuit and an analog-to-digital converter. The current input end of the collection circuit is connected to the output end of the protection element, the first output end of the collection circuit is used to be connected to the ground end of the power supply device, and the collection circuit is used to output an analog signal according to the current passing through the protection element. The input end of the analog-to-digital converter is connected to the second output end of the collection circuit, and the analog-to-digital converter is used to convert the analog signal into a digital signal.

[0013] The radio frequency device provided in the embodiment of the present application collects the current passing through the protection element through the collection circuit and outputs an analog signal. The analog-to-digital converter converts the analog signal into a digital signal. According to the digital signal, it can be determined whether the protection element is abnormal or whether the connection between the first power supply and the second power supply is good.

[0014] In a possible implementation, the acquisition circuit includes a Hall current sensor, an input end of the Hall current sensor is connected to an output end of the protection element, a first output end of the Hall current sensor is connected to a ground end of a power supply device, and a second output end of the Hall current sensor is connected to an input end of an analog-to-digital converter.

[0015] The radio frequency device provided in the embodiment of the present application detects the current passing through the protection element through the Hall current sensor and outputs an analog signal, which can improve the accuracy of the acquired current. In addition, since the Hall current sensor is a magnetic coupling device, it naturally has a high degree of isolation, so there is no need to add an additional lightning protection circuit, thereby reducing the lightning protection design requirements and costs of the current detection circuit.

[0016] In a possible implementation, the acquisition circuit includes a resistor shunt or a photoelectric current sensor, an input end of one of the resistor shunt and the photoelectric current sensor is connected to an output end of the protection element, and an output end of one of the resistor shunt and the photoelectric current sensor is connected to a ground end of the power supply device.

[0017] The radio frequency device provided in the embodiment of the present application detects the magnitude of the current passing through the protection element through a resistor shunt or a photoelectric current sensor and outputs an analog signal, and can also ensure that the analog-to-digital converter outputs a digital signal.

[0018] In a possible implementation, the current detection circuit further includes a lightning protection circuit, and a first end and a second end of the lightning protection circuit are respectively connected to an input end and an output end of one of the resistor shunt and the photoelectric current sensor.

[0019] The radio frequency device provided in the embodiment of the present application can further improve the lightning protection performance of the current detection circuit by providing a lightning protection circuit, and can prevent the current detection circuit from being damaged by lightning strikes.

[0020] In a possible implementation, the lightning protection circuit includes a transient suppression diode or a varistor.

[0021] The radio frequency device provided in the embodiment of the present application can prevent the current detection circuit from being damaged by lightning strikes through a transient suppression diode or a varistor.

[0022] In a possible implementation, the acquisition circuit further includes an operational amplifier, an output end of the operational amplifier is connected to an input end of the analog-to-digital converter, and a first input end and a second input end of the operational amplifier are respectively connected to an input end and an output end of one of the resistor shunt and the photoelectric current sensor.

[0023] The radio frequency device provided in the embodiment of the present application amplifies the analog signal output by the resistor shunt or the photoelectric current sensor through an operational amplifier and transmits it to the analog-to-digital converter, thereby improving the detection accuracy of the current detection circuit.

[0024] In a possible implementation manner, the load unit is one of the following units: a radio remote unit and an active antenna unit.

[0025] A second aspect of the present application provides a communication device, comprising a second power supply and a radio frequency device as described in any one of the first aspects, wherein the second power supply is used to convert alternating current into direct current.

[0026] The communication device provided in the embodiment of the present application adopts the radio frequency device in the first aspect, which can prevent the radio frequency device from carbonizing when the first power supply and the second power supply are reversely connected, thereby ensuring the normal use of the communication device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a first base station in the related art when it is in normal connection;

[0028] Figure 2 for Figure 1 A structural diagram of a base station in the figure when it is in reverse connection;

[0029] Figure 3 is a structural schematic diagram of a second base station in the related art;

[0030] Figure 4 A schematic diagram of the structure of a first communication device provided in an embodiment of the present application;

[0031] Figure 5 A first structural diagram of a second communication device provided in an embodiment of the present application;

[0032] Figure 6 for Figure 5 A second structural schematic diagram of the communication device in;

[0033] Figure 7 A schematic diagram of the structure of a third communication device provided in an embodiment of the present application;

[0034] Figure 8 A schematic diagram of the structure of a fourth communication device provided in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] 100. Communication equipment;

[0037] 200. Radio frequency device;

[0038] 210. A first power source;

[0039] 10. Power supply device;

[0040] 20. Protection components;

[0041] 30. Current detection circuit; 31. Collection circuit; 311. Hall current sensor; 312. Resistor shunt; 313. Operational amplifier;

[0042] 32. Analog-to-digital converter;

[0043] 33. Lightning protection circuit; 331. Transient suppression diode;

[0044] 220, load cell;

[0045] 300. Second power source. DETAILED DESCRIPTION

[0046] Figure 1 is a structural diagram of a first base station in the related art when it is in normal connection, Figure 2 for Figure 1 The schematic diagram of the structure when the base station in the figure is in reverse connection. Figure 1 As shown, the base station 400 includes a second power supply 410 and a radio frequency module 420, the radio frequency module 420 includes a first power supply 421 and a load unit 422, the second power supply 410 is used to convert alternating current into direct current, and the first power supply 421 is used to provide the direct current output by the second power supply 410 to the load unit 422. Among them, the input end of the second power supply 410 is used to receive alternating current, the positive output end of the second power supply 410 is connected to the positive input end of the first power supply 421, the negative output end of the second power supply 410 is connected to the negative input end of the first power supply 421, and the positive output end of the second power supply 410 (such as Figure 1 ) and the positive input terminal of the first power supply 421 (as shown in RTN of the second power supply 410 in FIG. Figure 1 The RTN of the first power supply 421 is grounded, and the output end of the first power supply 421 is electrically connected to the load unit 422.

[0047] However, see Figure 2 As shown, when the positive output terminal and the negative output terminal of the second power supply 410 are reversely connected to the positive input terminal and the negative input terminal of the first power supply 421 and powered on, a large short-circuit current will be generated, causing the RF module 420 to carbonize, which may cause the base station 400 to be unusable.

[0048] Figure 3 It is a structural diagram of a second base station in the related technology.

[0049] In order to solve the carbonization problem of the RF module 420 caused by the reverse connection of the first power supply 421 and the second power supply 410, the following solutions can be used in the related art:

[0050] The first solution is to connect a diode 500 (eg Figure 3 Specifically, the positive input terminal of the first power supply 421 is connected to the positive output terminal of the second power supply 410 through a diode 500. However, when the diode 500 is used to implement reverse connection protection, the DC loss is very large due to the large forward conduction voltage drop of the diode 500. For example, the forward conduction voltage of the diode 500 can be 0.3V to 0.7V. If the operating current of the RF module 420 is 30A, the power consumption of the diode 500 reaches 9W to 21W. In addition, the actual engineering implementation requires multiple diodes 500 to be connected in parallel and use a large heat dissipation packaging device, so the cost of using the diode 500 to prevent reverse connection is high.

[0051] The second option is to Figure 3The diode 500 is replaced by a MOS tube (metal-oxide-semiconductorfield-effect transistor, MOSFET for short). Specifically, the positive input terminal of the first power supply 421 is connected to the positive output terminal of the second power supply 410 through the MOS tube. However, when the MOS tube is used to implement the reverse connection protection, in order to meet the lightning protection design requirements, an additional lightning protection circuit needs to be added, which increases the cost.

[0052] In view of this, the embodiments of the present application provide a radio frequency device 200 and a communication device 100, which can reduce DC loss while achieving anti-reverse connection protection and can also reduce costs.

[0053] The communication device 100 provided in the embodiment of the present application can be a base station, a radar, etc. Among them, the base station can also be called an access network device, which can be located in a base station subsystem (base btation bubsystem, BBS), a terrestrial radio access network (UMTS terrestrial radio access network, UTRAN) or an evolved terrestrial radio access network (evolved terrestrial radio access, E-UTRAN), and is used to perform cell coverage of signals to achieve communication between a terminal and a wireless network. Exemplarily, the base station can be a base transceiver station (BTS) in a global system for mobile communications (global system for mobile communications, GSM) or a (code division multiple access, CDMA) system, or a node B (NodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolved node B (eNB or eNodeB) in a long-term evolution (LTE) system, or a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario. Alternatively, the base station may also be a relay station, an access point, a vehicle-mounted device, a wearable device, a g-node (gNodeB or gNB) in a new radio (NR) system, an access network device in a future evolving network, etc., which is not limited in the embodiments of the present application. In the embodiments of the present application, the base station is taken as the above-mentioned communication device 100 as an example for explanation.

[0054] Figure 4This is a schematic diagram of the structure of the first communication device provided in the embodiment of the present application. Figure 4 As shown, the communication device 100 of the embodiment of the present application includes a radio frequency device 200 and a second power supply 300, the radio frequency device 200 includes a first power supply 210 and a load unit 220, the input end of the first power supply 210 is connected to the output end of the second power supply 300, and the ground end of the first power supply 210 (such as Figure 4 The first power source 210 RTN shown in FIG) and the ground terminal for connecting to the second power source 300 (as shown in FIG. Figure 4 The input terminal of the second power supply 300 is used to receive alternating current, and the second power supply 300 is used to convert the received alternating current into direct current and transmit it to the first power supply 210. The first power supply 210 is used to provide the direct current output by the second power supply 300 to the load unit 220 to ensure the normal operation of the load unit 220. Among them, the ground terminal and the input terminal of the first power supply 210 are one positive pole and the other negative pole; the ground terminal and the output terminal of the second power supply 300 are one positive pole and the other negative pole.

[0055] The load unit 220 may be a remote radio unit (RRU) or an active antenna unit (AAU), etc. In addition, when there are multiple load units 220, the multiple load units 220 may be the same or different, or may be partially the same. For example, if there are four load units 220, two of the four may be remote radio units, and the other two may be active antenna units.

[0056] When there are multiple load units 220, the first power supply 210 provides the DC power output by the second power supply 300 to the multiple load units 220 respectively, so as to supply power to the multiple load units 220. In other words, the first power supply 210 may have multiple output terminals, each of which is connected to the input terminal of a load unit 220.

[0057] The first power supply 210 provided in the embodiment of the present application may include but is not limited to a -48V power supply system, a -50V power supply system, a -30V power supply system, a +48V power supply system, a +60V power supply system, etc. Among them, the -48V power supply system refers to grounding the positive pole of the first power supply 210, and correspondingly, the positive pole of the second power supply 300 is grounded. In other words, the positive pole of the first power supply 210 and the positive pole of the second power supply 300 are grounded. Similarly, the +48V power supply system refers to grounding the negative pole of the first power supply 210, and correspondingly, the negative pole of the second power supply 300 is grounded. In the embodiment of the present application, the -48V power supply system is taken as an example of the above-mentioned first power supply 210 for explanation.

[0058] In the embodiment of the present application, the return current conductor (RTN) refers to the positive or negative electrode of the power supply that is grounded, for example Figure 4 As shown, the positive electrode of the first power source 210 or the second power source 300 is grounded, so the positive electrode of the first power source 210 and the second power source 300 can also be called a return conductor.

[0059] It should be noted that, in addition to converting AC power into DC power, the second power supply 300 can also be used to receive DC power of a first voltage and output DC power of a second voltage.

[0060] The implementation of the radio frequency device 200 provided in the embodiment of the present application is described below.

[0061] Figure 5 This is a schematic diagram of the first structure of the second communication device provided in the embodiment of the present application. Figure 5 As shown, the communication device 100 of the embodiment of the present application includes a second power supply 300 and a radio frequency device 200. The second power supply 300 is used to convert alternating current into direct current. The radio frequency device 200 includes a first power supply 210 and a load unit 220. The first power supply 210 is used to provide the direct current output by the second power supply 300 to the load unit 220. The first power supply 210 includes a power supply device 10 and a protection element 20, the input end of the power supply device 10 is used to be connected to the output end of the second power supply 300, the ground end of the power supply device 10 is used to be connected to the output end of the protection element 20, and the input end of the protection element 20 is used to be connected to the ground end of the second power supply 300. The protection element 20 includes a conductive conductor portion, and the conductor portion is used to fuse when the current passing through the protection element 20 is greater than a preset value. The ground end of the power supply device 10 refers to the positive electrode (such as Figure 5 The ground terminal of the second power supply 300 refers to the positive electrode of the second power supply 300 (as shown in RTN in FIG. Figure 5 One of the input terminal and the ground terminal of the power supply device 10 is a positive pole, and the other is a negative pole.

[0062] Combination Figure 5 It can be seen that when the first power source 210 is positively connected to the second power source 300, the ground terminal of the power supply device 10 is connected to the ground terminal of the second power source 300 through the protection element 20 (such as Figure 5 The RTN of the power supply device 10 is connected to the RTN of the second power supply 300), and the input end of the power supply device 10 is connected to the output end of the second power supply 300 (such as Figure 5In the embodiment, -48V of the power supply device 10 is connected to -48V of the second power supply 300, and two return paths may exist in the communication device 100: a first return path is formed between -48V and RTN, and a second return path is formed between -48V and GND. After the RF device 200 is powered on, the loop currents in the two return paths are normal, the conductor part in the protection element 20 will not be blown, and the power supply device 10 can normally provide DC power to the load unit 220.

[0063] Figure 6 for Figure 5 A second structural diagram of the communication device in FIG. Figure 6 As shown, when the first power supply 210 and the second power supply 300 are connected in reverse, the input end of the protection element 20 is connected to the output end of the second power supply 300, and the input end of the power supply device 10 is connected to the ground end of the second power supply 300. After the RF device 200 is powered on, a short-circuit current will appear between the second power supply 300 and the RF device 200. When the short-circuit current passes through the conductor part of the protection element 20, the conductor part will heat up until the current passing through the protection element 20 is greater than a preset value. The conductor part melts, so that the ground end of the power supply device 10 and the output end of the second power supply 300 are disconnected, so that the protection function can be realized, the carbonization problem of the RF device 200 can be prevented, and the normal use of the RF device 200 can be ensured.

[0064] The specific structure of the protection element 20 is not limited here. Figure 5 As shown, the protection element 20 may be a fuse, which may play a protective role when the first power source 210 and the second power source 300 are connected in reverse, thereby preventing the radio frequency device 200 from carbonizing due to a short circuit current. In addition, since the fuse is a component in the prior art, the cost of the fuse is low, thereby reducing the cost of the protection element 20, and further reducing the cost of the radio frequency device 200. Alternatively, in some embodiments, the protection element 20 may also be a fuse, which may also protect the radio frequency device 200 when the first power source 210 and the second power source 300 are connected in reverse, thereby preventing the radio frequency device 200 from carbonizing.

[0065] It should be noted that, in addition to being used in the communication device 100 , the protection element 20 may also be applied to devices with two power sources, such as photovoltaic devices and vehicle-mounted devices.

[0066] Figure 7 A schematic diagram of the structure of a third communication device provided in an embodiment of the present application. Figure 7 and Figure 5The difference is that the first power supply 210 may further include a current detection circuit 30. The current input end of the current detection circuit 30 is connected to the output end of the protection element 20, and the current output end of the current detection circuit 30 is used to be connected to the ground end of the power supply device 10. The current detection circuit 30 is used to detect the magnitude of the current passing through the protection element 20.

[0067] After the first power supply 210 and the second power supply 300 are reversely connected and powered on, the current detection circuit 30 can detect the magnitude of the current passing through the protection element 20 to determine whether the protection element 20 is invalid or continuously disconnected. In addition, when the first power supply 210 and the second power supply 300 are connected in the right direction, the current detection circuit 30 can also detect the magnitude of the current passing through the protection element 20 to determine whether the connection between the ground terminal of the power supply device 10 and the ground of the second power supply 300 is good, which can ensure the normal use of the radio frequency device 200.

[0068] After the current detection circuit 30 detects that the current passing through the protection element 20 is abnormal, it can send an abnormal signal to a background such as a server or a control center, and notify maintenance personnel to repair the communication device 100 in time to ensure that the communication device 100 works normally. There is no restriction on how to send the abnormal signal to the background according to the detection result of the current detection circuit 30.

[0069] Combination Figure 7 It can be seen that the current detection circuit 30 may also include a collection circuit 31 and an analog-to-digital converter 32. Among them, the current input end of the collection circuit 31 is connected to the output end of the protection element 20, the first output end of the collection circuit 31 is used to be connected to the ground end of the power supply device 10, and the collection circuit 31 is used to output an analog signal according to the current passing through the protection element 20. The input end of the analog-to-digital converter 32 is connected to the second output end of the collection circuit 31, and the analog-to-digital converter 32 is used to convert the analog signal into a digital signal.

[0070] When the first power supply 210 and the second power supply 300 are connected forwardly or reversely, the acquisition circuit 31 can output an analog signal according to the current passing through the protection element 20, and the analog-to-digital converter 32 converts the analog signal into a digital signal. According to the digital signal, it can be determined whether the protection element 20 is abnormal or whether the connection between the first power supply 210 and the second power supply 300 is good.

[0071] There is no specific limitation on how to determine whether the protection element 20 is abnormal based on the digital signal. For example, when the first power supply 210 and the second power supply 300 are connected reversely, the protection element 20 is disconnected, so that the loop current is zero. At this time, the acquisition circuit 31 cannot output an analog signal, and thus the analog-to-digital converter 32 cannot output a digital signal. Thus, it can be determined that the protection element 20 is abnormal when no digital signal is output.

[0072] There is no specific limitation on how to determine whether the connection between the first power supply 210 and the second power supply 300 is good according to the digital signal. For example, it can be determined that the connection between the first power supply 210 and the second power supply 300 is good according to the digital signal and the comparison signal, and the comparison signal refers to the signal output by the analog-to-digital converter 32 when the connection between the first power supply 210 and the second power supply 300 is good.

[0073] Combination Figure 7 It can be seen that the acquisition circuit 31 may include a Hall current sensor 311, the input end of the Hall current sensor 311 is connected to the output end of the protection element 20, the first output end of the Hall current sensor 311 is connected to the ground end of the power supply device 10, and the second output end of the Hall current sensor 311 is connected to the input end of the analog-to-digital converter 32.

[0074] The Hall current sensor 311 detects the current passing through the protection element 20 and outputs an analog signal, which can improve the accuracy of obtaining the current. In addition, since the Hall current sensor 311 is a magnetic coupling device, it naturally has a high degree of isolation, so there is no need to add an additional lightning protection circuit, thereby reducing the lightning protection design requirements and costs of the current detection circuit 30.

[0075] The specific structure of the Hall current sensor 311 is not limited here. For example, the Hall current sensor 311 internally integrates a linear Hall circuit and a low-impedance main current wire. The detected current flows through the main current wire to generate a magnetic field to generate a Hall potential on the Hall circuit. When the conductor portion of the protection element 20 is blown, the current flowing through the Hall current sensor 311 is zero, and the Hall potential difference is zero. When the conductor portion of the protection element 20 is not blown, the current flowing through the Hall current sensor 311 is not zero, and the Hall potential difference is not zero. Therefore, the magnitude of the current passing through the protection element 20 can be determined by detecting the Hall potential difference.

[0076] It should be noted that, in addition to using the Hall current sensor 311 to detect the current passing through the protection element 20, other types of current sensors may also be used, such as but not limited to a resistor shunt 312, a photoelectric current sensor or an electromagnetic current sensor.

[0077] Figure 8 A schematic diagram of the structure of a fourth communication device provided in an embodiment of the present application. Figure 8 and Figure 7 The difference is that the structure of the current detection circuit 30 is different. Specifically, for example Figure 8As shown, the acquisition circuit 31 may also include a resistor shunt 312, the input end of the resistor shunt 312 is connected to the output end of the protection element 20, and the output end of the resistor shunt 312 is connected to the ground end of the power supply device 10. After the current passing through the protection element 20 passes through the resistor shunt 312, the resistor shunt 312 can convert the current into a voltage value, and then convert the voltage value through the analog-to-digital converter 32, so as to achieve current measurement.

[0078] There is no limitation on the specific type of the resistor shunt 312. For example, Figure 8 As shown, the resistor shunt 312 may be a sampling resistor.

[0079] In some possible implementations, see Figure 8 As shown, the acquisition circuit 31 may further include an operational amplifier 313, the output end of the operational amplifier 313 is connected to the input end of the analog-to-digital converter 32, and the first input end and the second input end of the operational amplifier 313 are respectively connected to the input end and the output end of the resistor shunt 312.

[0080] Accordingly, the analog signal output by the resistor shunt 312 is amplified by the operational amplifier 313 and transmitted to the analog-to-digital converter 32 , so as to improve the detection accuracy of the current detection circuit 30 .

[0081] In some possible implementations, see Figure 8 As shown, the current detection circuit 30 may further include a lightning protection circuit 33 , wherein a first end and a second end of the lightning protection circuit 33 are respectively connected to an input end and an output end of the resistor shunt 312 .

[0082] Accordingly, by providing the lightning protection circuit 33 , the lightning protection performance of the current detection circuit 30 can be further improved, and the current detection circuit 30 can be prevented from being damaged by lightning strikes.

[0083] The specific structure of the lightning protection circuit 33 is not limited here. Figure 8 As shown, the lightning protection circuit 33 may include two transient suppression diodes 331, which are connected in series. Of course, the number of transient suppression diodes 331 may be more or less than two. One of the two transient suppression diodes 331 is connected to the input end of the resistor shunt 312, and the other transient suppression diode 331 is connected to the output of the resistor shunt 312. Alternatively, in some embodiments, the lightning protection circuit 33 may also include a varistor, and the two ends of the varistor are respectively connected to the input end and the output end of the operational amplifier 313.

[0084] It should be noted that Figure 8The resistor shunt 312 in the embodiment may also be replaced by other types of current sensors other than the Hall current sensor 311. For example, Figure 8 The resistor shunt 312 is replaced by a photoelectric sensor. Accordingly, the input end of the photoelectric current sensor is connected to the output end of the protection element 20, the output end of the photoelectric current sensor is connected to the ground end of the power supply device 10, and the first input end and the second input end of the operational amplifier 313 are respectively connected to the input end and the output end of the photoelectric current sensor.

[0085] The present application embodiment also provides a radio frequency device 200, see above Figures 5 to 8 As shown in any one of the above, the radio frequency device 200 may include a first power supply 210 and a load unit 220. The first power supply 210 is used to provide the direct current output by the second power supply 300 to the load unit 220. The first power supply 210 includes a power supply device 10 and a protection element 20, the input end of the power supply device 10 is used to be connected to the output end of the second power supply 300, the ground end of the power supply device 10 is used to be connected to the output end of the protection element 20, and the input end of the protection element 20 is used to be connected to the ground end of the second power supply 300. The protection element 20 includes a conductive conductor portion, and the conductor portion is used to fuse when the current passing through the protection element 20 is greater than a preset value. The input end and the ground end of the power supply device 10 are one positive pole and the other negative pole; the output end and the ground end of the second power supply 300 are one positive pole and the other negative pole.

[0086] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0087] In the embodiments of the present application, the devices or elements referred to or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0088] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0089] The term "plurality" in this article refers to two or more than two. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship; in a formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship.

[0090] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0091] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A radio frequency device, It is characterized in that comprising a first power supply and a load unit; The first power supply is used to provide the direct current output by the second power supply to the load unit; The first power supply includes a power supply device and a protection element, the input end of the power supply device is used to connect to the output end of the second power supply, the ground end of the power supply device is used to connect to the output end of the protection element, and the input end of the protection element is used to connect to the ground end of the second power supply; The protection element comprises a conductive conductor portion, and the conductor portion is used to fuse when the current passing through the protection element is greater than a preset value.

2. The radio frequency device according to claim 1, It is characterized in that The protection element is a fuse or a fuse.

3. The radio frequency device according to claim 1 or 2, It is characterized in that The first power supply also includes a current detection circuit, a current input end of the current detection circuit is connected to the output end of the protection element, a current output end of the current detection circuit is used to be connected to the ground end of the power supply device, and the current detection circuit is used to detect the current passing through the protection element.

4. The radio frequency device according to claim 3, It is characterized in that The current detection circuit includes an acquisition circuit and an analog-to-digital converter; The current input end of the acquisition circuit is connected to the output end of the protection element, the first output end of the acquisition circuit is used to be connected to the ground end of the power supply device, and the acquisition circuit is used to output an analog signal according to the current size passing through the protection element; The input end of the analog-to-digital converter is connected to the second output end of the acquisition circuit, and the analog-to-digital converter is used to convert the analog signal into a digital signal.

5. The radio frequency device according to claim 4, It is characterized in that The acquisition circuit includes a Hall current sensor, an input end of the Hall current sensor is connected to the output end of the protection element, a first output end of the Hall current sensor is connected to the ground end of the power supply device, and a second output end of the Hall current sensor is connected to the input end of the analog-to-digital converter.

6. The radio frequency device according to claim 4, It is characterized in that The acquisition circuit includes a resistor shunt or a photoelectric current sensor, an input end of one of the resistor shunt and the photoelectric current sensor is connected to an output end of the protection element, and an output end of one of the resistor shunt and the photoelectric current sensor is connected to a ground end of the power supply device.

7. The radio frequency device according to claim 6, It is characterized in that The current detection circuit further includes a lightning protection circuit, wherein a first end and a second end of the lightning protection circuit are respectively connected to an input end and an output end of one of the resistor shunt and the photoelectric current sensor.

8. The radio frequency device according to claim 7, It is characterized in that The lightning protection circuit includes a transient suppression diode or a varistor.

9. The radio frequency device according to any one of claims 6 to 8, It is characterized in that The acquisition circuit also includes an operational amplifier, the output end of the operational amplifier is connected to the input end of the analog-to-digital converter, and the first input end and the second input end of the operational amplifier are respectively connected to the input end and the output end of one of the resistor shunt and the photoelectric current sensor.

10. The radio frequency device according to any one of claims 1 to 9, It is characterized in that The load unit is one of the following units: a radio remote unit and an active antenna unit.

11. A communication device, It is characterized in that The invention comprises a second power source and the radio frequency device according to any one of claims 1 to 10, wherein the second power source is used to convert alternating current into direct current.

Images