CN116647110A - Power supply protection circuit for antenna system and antenna system - Google Patents

Power supply protection circuit for antenna system and antenna system Download PDF

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Publication number
CN116647110A
CN116647110A CN202310666096.4A CN202310666096A CN116647110A CN 116647110 A CN116647110 A CN 116647110A CN 202310666096 A CN202310666096 A CN 202310666096A CN 116647110 A CN116647110 A CN 116647110A
Authority
CN
China
Prior art keywords
circuit
power supply
antenna system
dcdc converter
supply module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310666096.4A
Other languages
Chinese (zh)
Inventor
孙金龙
池彦永
徐天宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shijiazhuang Galaxy Microwave Technology Co ltd
Original Assignee
Shijiazhuang Galaxy Microwave Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shijiazhuang Galaxy Microwave Technology Co ltd filed Critical Shijiazhuang Galaxy Microwave Technology Co ltd
Priority to CN202310666096.4A priority Critical patent/CN116647110A/en
Publication of CN116647110A publication Critical patent/CN116647110A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
    • H02H11/003—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection using a field effect transistor as protecting element in one of the supply lines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The application provides a power supply protection circuit for an antenna system and the antenna system. The power supply module of the antenna system comprises a power supply module and a DCDC converter; the power supply protection circuit includes: an anti-surge circuit and an EMC filter circuit; the input port of the anti-surge circuit is connected with the power supply module, and the output port of the anti-surge circuit is connected with the EMC filter circuit; an output port of the EMC filter circuit is connected with the DCDC converter. According to the application, the anti-surge circuit and the EMC circuit are arranged between the power supply module of the antenna system and the DCDC converter, the anti-surge circuit absorbs the surge voltage input by the power supply module so as to avoid damaging the DCDC converter circuit, and the EMS circuit is used for realizing the electromagnetic compatibility performance of the power supply module and the DCDC converter and optimizing the EMS performance of the power supply module and the DCDC converter. The stable operation performance of the power supply circuit is improved from two aspects of surge prevention and electromagnetic interference prevention optimization based on the power supply protection circuit, so that the operation stability of an antenna system is ensured.

Description

Power supply protection circuit for antenna system and antenna system
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a power protection circuit for an antenna system and an antenna system.
Background
The current standard brick-type DCDC converter module has been widely used in such fields as military industry, communication, medical treatment, railway locomotives, industrial production and the like. When used in an antenna system in the communication field, the DCDC converter becomes the basis for safe operation of the antenna system. With the development of the network, in order to realize better scientific research and disaster early warning, the antenna system is deployed in mountain forests, and the mountain heights Lin Mi can generate electromagnetic interference to the antenna system. When the antenna system is in mountain forest or other relatively complex electromagnetic environment, the DCDC converter of the antenna system has a great risk of electromagnetic interference, so that providing a power protection circuit for the antenna system with electromagnetic interference resistance is a basis for maintaining stable operation of the antenna system.
Disclosure of Invention
The embodiment of the application provides a power supply protection circuit for an antenna system and the antenna system, which are used for solving the problem of how to maintain the stable operation of the antenna system.
In a first aspect, an embodiment of the present application provides a power protection circuit for an antenna system, where a power module of the antenna system includes a power supply module and a DCDC converter; the power supply protection circuit includes: an anti-surge circuit and an electromagnetic compatibility (Electromagnetic Compatibility, EMC) filter circuit;
the input port of the anti-surge circuit is connected with the power supply module, and the output port of the anti-surge circuit is connected with the EMC filter circuit;
and an output port of the EMC filter circuit is connected with the DCDC converter.
In one possible implementation, the power protection circuit further includes: an anti-reverse connection circuit;
the reverse connection preventing circuit is arranged between the power supply module and the surge preventing circuit.
In one possible implementation, the DCDC converter output is connected to the anti-reverse circuit.
In one possible implementation manner, the anti-reverse connection circuit comprises an NMOS tube, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor and a diode which are connected; the grid electrode of the NMOS tube is connected with one end of the second resistor, the first capacitor and the diode, the drain electrode of the NMOS tube is connected with one end of the third resistor and the power supply module, the source electrode of the NMOS tube is connected with one end of the second resistor and one end of the second capacitor, and the other ends of the first resistor, the first capacitor and the diode are connected with the power supply module and the anti-surge circuit.
In one possible implementation manner, the other end of the first resistor, the first capacitor and the diode is further connected to a DCDC converter.
In one possible implementation, the EMC filter circuit includes: electromagnetic interference (Electromagnetic Interference, EMI) filter circuits.
In one possible implementation, the number of EMI filter circuits is two or more; the EMI filter circuits at all levels are sequentially connected in series, and the gains of the EMI filter circuits at all levels are gradually increased.
In one possible implementation, the EMI filter circuit includes an EMI filter, a resistor, a capacitor, a diode, and an inductor; wherein the capacitance includes a common mode capacitance and a differential mode capacitance.
In a second aspect, an embodiment of the present application provides an antenna system, including: the device comprises a power supply module, a DCDC converter, a transmitting front end, a receiving front end and an antenna unit; wherein the transmitting front end comprises a housing and a power protection circuit as described above in the first aspect or any one of the possible implementations of the first aspect;
the power supply module, the DCDC converter and the power supply protection circuit are arranged outside the shell; the DCDC converter is connected with the internal power supply circuit of the emission front end and is used for supplying power to the emission front end;
the antenna unit is arranged in the shell and/or outside the shell.
In one possible implementation, the antenna element connection circuitry is coated with an EMI shielding material.
Based on the embodiment of the application, at least the following beneficial effects can be obtained:
an anti-surge circuit and an EMC circuit are arranged between a power supply module of the antenna system and the DCDC converter, the anti-surge circuit absorbs the input surge voltage of the power supply module so as to avoid damage to the DCDC converter circuit, and the EMS performance of the power supply module and the DCDC converter is optimized through the EMC circuit. The stable operation performance of the power supply circuit is improved from two aspects of surge prevention and electromagnetic interference prevention optimization based on the power supply protection circuit, so that the operation stability of an antenna system is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an antenna system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an antenna system according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of an antenna system according to another embodiment of the present application;
FIG. 4 is a schematic diagram of an anti-reverse circuit according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an EMI filter circuit according to an embodiment of the application.
Detailed Description
In order to make the present solution better understood by those skilled in the art, the technical solution in the present solution embodiment will be clearly described below with reference to the accompanying drawings in the present solution embodiment, and it is obvious that the described embodiment is an embodiment of a part of the present solution, but not all embodiments. All other embodiments, based on the embodiments in this solution, which a person of ordinary skill in the art would obtain without inventive faculty, shall fall within the scope of protection of this solution.
The term "comprising" in the description of the present solution and the claims and in the above-mentioned figures, as well as any other variants, means "including but not limited to", intended to cover a non-exclusive inclusion, and not limited to only the examples listed herein. Furthermore, the terms "first" and "second," etc. are used for distinguishing between different objects and not for describing a particular sequential order.
The terms first, second and the like in the description and in the claims of embodiments of the application and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the application herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. The term "plurality" means two or more, unless otherwise indicated. In the embodiment of the application, the character "/" indicates that the front object and the rear object are in an OR relationship. For example, A/B represents: a or B. The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The implementation of the application is described in detail below with reference to the specific drawings:
fig. 1 is a schematic structural diagram of an antenna system according to an embodiment of the present application. Referring to fig. 1, a power module of an antenna system includes: a power supply module 1 and a DCDC converter 2; the power supply protection circuit 3 includes: an anti-surge circuit 31 and an EMC filter circuit 32.
The input port of the anti-surge circuit 31 is connected with the power supply module 1, and the output port is connected with the EMC filter circuit 32. An output port of the EMC filter circuit 32 is connected to the DCDC converter 2.
During operation of the antenna system, the DCDC converter 2 is supplied by a power supply. In the power supply process, the harmonic wave generated by the DCDC converter 2 generates electromagnetic interference to the circuit around the DCDC converter 2, so that the signal quality in the circuit is reduced, and the communication of an antenna system is seriously affected when the electromagnetic interference exceeds the standard. In addition, the antenna system is in a complex electromagnetic environment, and electromagnetic disturbance of the external environment also affects the DCDC converter 2, so that the DCDC converter 2 cannot work stably, and the stable operation of the antenna system is affected.
On the other hand, the antenna system has the action of restarting the power supply module 1 or switching the power supply module 1 to work so as to ensure the energy supply for the operation of the antenna system. When the power supply module 1 is started, the surge current can cause the instantaneous drop of the input voltage, which affects the normal operation of the DCDC converter 2 and other working circuits of the antenna system, and even causes the action of the protection circuit. Therefore, the power-on surge current of the power supply must be limited.
The EMC filter circuit 32 is a circuit composed of a capacitor and an inductor. In the design process, the circuit composition is calculated based on the standard curve. The standard curve is the standard signal strength of the interference signal after the interference signal is compatible by the filter circuit under each frequency.
In the present embodiment, an anti-surge circuit 31 and an EMC circuit are provided between the power supply module 1 and the DCDC converter 2 of the antenna system, and the input surge voltage of the power supply module 1 is absorbed by the anti-surge circuit 31 to avoid damage to the DCDC converter circuit, and the electromagnetic compatibility performance of the power supply module 1 and the DCDC converter 2 is realized by the EMC circuit, and the EMS performance thereof is optimized. The stable operation performance of the power supply circuit is improved from two aspects of surge prevention and electromagnetic interference prevention optimization based on the power supply protection circuit 3, so that the operation stability of an antenna system is ensured.
Fig. 2 is a schematic structural diagram of an antenna system according to another embodiment of the present application, and in one possible implementation, as shown in fig. 2, the power protection circuit 3 further includes: an anti-reverse connection circuit 33; the reverse connection preventing circuit 33 is provided between the power supply module 1 and the surge preventing circuit 31.
In the present embodiment, the circuit damage of the DCDC converter 2 caused by reverse polarity of the input power of the power supply module 1 is avoided by the reverse polarity preventing circuit 33.
Fig. 3 is a schematic structural diagram of an antenna system according to another embodiment of the present application. In one possible implementation, as shown in fig. 3, the DCDC converter 2 output is connected to an anti-reverse circuit 33.
In this embodiment, the voltage at the output end of the DCDC converter 2 is processed by the anti-surge circuit 31 and the EMC filter circuit 32, the voltage is stable, and the output end of the DCDC converter 2 is connected with the anti-reverse connection circuit 33 to realize that the control part of the anti-reverse connection circuit 33 supplies power, so as to ensure that the anti-reverse connection circuit 33 continuously and stably operates.
In other possible implementations, the anti-reverse circuit 33 connects to the independent power module to operate on an independent power module power basis.
In various embodiments, the anti-reverse circuit 33 is configured in a variety of ways. Fig. 4 is a schematic structural diagram of an anti-reverse circuit 33 according to an embodiment of the application.
In one possible implementation, the anti-reverse connection circuit 33 includes an NMOS transistor Q1, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1A, a second capacitor C1B, and a diode D1 connected; the grid G of the NMOS tube Q1 is connected with one end of a second resistor R2, a first resistor R1, a first capacitor C1A and a diode D1, the drain D of the NMOS tube Q1 is connected with one end of a third resistor R3 and the power supply module 1, the source S of the NMOS tube Q1 is connected with one end of the second resistor R2 and one end of a second capacitor C1B, and the other ends of the first resistor R1, the first capacitor C1A and the diode D1 are connected with the power supply module 1 and the anti-surge circuit 31.
In this embodiment, when the power supply module 1 is connected positively, the NMOS transistor Q1 is turned on, and when the input end is connected reversely, the NMOS transistor Q1 is in an off state, and the electrical connection between the anti-surge circuits 31 is disconnected, and the anti-reverse connection protection circuit is switched from an operating state to an idle state, so that the overall power consumption of the anti-reverse connection protection circuit is reduced, and the heat energy generated in the circuit is also reduced.
In one possible implementation, the first resistor R1, the first capacitor C1A, and the other end of the diode D1 are further connected to the DCDC converter 2, so as to maintain stable operation based on the output voltage of the DCDC converter 2.
In one possible implementation, the EMC filter circuit 32 includes: an EMI filter circuit.
The EMC filter circuit 32 is a circuit formed by a capacitor and an inductor, and is independently designed to achieve good anti-electromagnetic interference capability during the circuit design process.
In the present embodiment, the EMI filter circuit is used as a part of the EMC filter circuit 32 with emphasis on achieving electromagnetic compatibility of the antenna system power supply. The EMI filter circuit is used as an independent circuit, so that the EMI filter circuit is convenient to maintain and replace in a targeted manner.
In one possible implementation, the number of EMI filter circuits is two or more; the EMI filter circuits at all levels are sequentially connected in series, and the gains of the EMI filter circuits at all levels are gradually increased.
In this embodiment, the design of the multi-stage EMI filter circuit can greatly enhance the EMI filtering effect, enhance the electromagnetic compatibility, and improve the system stability compared with the single-stage circuit.
In one possible implementation, at least one stage of EMI filter circuits in each stage of EMI filter circuits has an electromagnetic interference suppression structure.
In one possible implementation, the EMI filter circuit includes an EMI filter, a resistor, a capacitor, a diode, and an inductor; the capacitors include common mode capacitors and differential mode capacitors.
In this embodiment, an EMI filter circuit scheme as shown in fig. 5 is adopted. In the figure, 6C 5-6C 8, 6C 16-6C 19 are common mode capacitors, 6C 9-6C 17, 6C 35-6C 40 are differential mode capacitors. The EMI filter circuit shown in FIG. 5 can effectively inhibit common mode disturbance and differential mode disturbance.
The embodiment of the application also provides an antenna system, which comprises: the power supply module 1, the DCDC converter 2, the transmitting front end, the receiving front end and the antenna unit; wherein the transmitting front end comprises a housing and a power protection circuit 3 as any one of the possible implementations above;
the power supply module 1, the DCDC converter 2 and the power supply protection circuit 3 are arranged outside the shell; the DCDC converter 2 is connected with an internal power supply circuit of the emission front end and is used for supplying power to the emission front end; the antenna unit is arranged in the shell and/or outside the shell.
In one possible implementation, the antenna element connection circuitry is coated with an EMI shielding material to avoid the antenna element from causing electromagnetic interference within the transceiver.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A power protection circuit for an antenna system, wherein a power module of the antenna system comprises a power supply module and a DCDC converter; the power supply protection circuit includes: an anti-surge circuit and an electromagnetic compatibility EMC filter circuit;
the input port of the anti-surge circuit is connected with the power supply module, and the output port of the anti-surge circuit is connected with the EMC filter circuit;
and an output port of the EMC filter circuit is connected with the DCDC converter.
2. The power protection circuit for an antenna system of claim 1, further comprising: an anti-reverse connection circuit;
the reverse connection preventing circuit is arranged between the power supply module and the surge preventing circuit.
3. The power protection circuit for an antenna system of claim 2, wherein the anti-reverse circuit is connected to the independent power module to operate based on an amount of power provided by the independent power module.
4. The power protection circuit for an antenna system of claim 2, wherein the anti-reverse connection circuit comprises a connected NMOS transistor, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, and a diode; the grid electrode of the NMOS tube is connected with one end of the second resistor, the first capacitor and the diode, the drain electrode of the NMOS tube is connected with one end of the third resistor and the power supply module, the source electrode of the NMOS tube is connected with one end of the second resistor and one end of the second capacitor, and the other ends of the first resistor, the first capacitor and the diode are connected with the power supply module and the anti-surge circuit.
5. The power protection circuit for an antenna system of claim 4, wherein the other end of the first resistor, the first capacitor, and the diode is further connected to a DCDC converter.
6. The power protection circuit for an antenna system of claim 1, wherein the EMC filter circuit comprises: electromagnetic interference EMI filter circuitry and EMS.
7. The power protection circuit for an antenna system of claim 6, wherein the number of EMI filter circuits is two or more; the EMI filter circuits at all levels are sequentially connected in series, and the gains of the EMI filter circuits at all levels are gradually increased.
8. The power protection circuit for an antenna system of claim 6, wherein the EMI filter circuit comprises an EMI filter, a resistor, a capacitor, a diode, and an inductor; wherein the capacitance includes a common mode capacitance and a differential mode capacitance.
9. An antenna system, comprising: the device comprises a power supply module, a DCDC converter, a transmitting front end, a receiving front end and an antenna unit; wherein the transmitting front end comprises a housing and the power protection circuit of any one of claims 1 to 8;
the power supply module, the DCDC converter and the power supply protection circuit are arranged outside the shell; the DCDC converter is connected with the internal power supply circuit of the emission front end and is used for supplying power to the emission front end;
the antenna unit is arranged in the shell and/or outside the shell.
10. The antenna system of claim 9, wherein the antenna element connection circuitry is coated with an EMI shielding material.
CN202310666096.4A 2023-06-07 2023-06-07 Power supply protection circuit for antenna system and antenna system Pending CN116647110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310666096.4A CN116647110A (en) 2023-06-07 2023-06-07 Power supply protection circuit for antenna system and antenna system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310666096.4A CN116647110A (en) 2023-06-07 2023-06-07 Power supply protection circuit for antenna system and antenna system

Publications (1)

Publication Number Publication Date
CN116647110A true CN116647110A (en) 2023-08-25

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ID=87615243

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310666096.4A Pending CN116647110A (en) 2023-06-07 2023-06-07 Power supply protection circuit for antenna system and antenna system

Country Status (1)

Country Link
CN (1) CN116647110A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105186846A (en) * 2015-09-30 2015-12-23 合肥华耀电子工业有限公司 Surge suppression circuit with input reverse connection preventing function
CN212343636U (en) * 2020-06-24 2021-01-12 深圳市时代创新科技有限公司 Military power supply filter
CN112531671A (en) * 2020-11-18 2021-03-19 南京熊猫电子股份有限公司 Protection circuit for DC power supply surge and power-off
CN214380045U (en) * 2021-03-31 2021-10-08 南京信息工程大学 Direct current input composite protection device
CN217464348U (en) * 2022-05-11 2022-09-20 广东恒润光电有限公司 Novel circuit integrating switching power supply and LED
CN116232360A (en) * 2021-12-06 2023-06-06 广州海格通信集团股份有限公司 Radio frequency front-end module, control method thereof, antenna system and electronic equipment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105186846A (en) * 2015-09-30 2015-12-23 合肥华耀电子工业有限公司 Surge suppression circuit with input reverse connection preventing function
CN212343636U (en) * 2020-06-24 2021-01-12 深圳市时代创新科技有限公司 Military power supply filter
CN112531671A (en) * 2020-11-18 2021-03-19 南京熊猫电子股份有限公司 Protection circuit for DC power supply surge and power-off
CN214380045U (en) * 2021-03-31 2021-10-08 南京信息工程大学 Direct current input composite protection device
CN116232360A (en) * 2021-12-06 2023-06-06 广州海格通信集团股份有限公司 Radio frequency front-end module, control method thereof, antenna system and electronic equipment
CN217464348U (en) * 2022-05-11 2022-09-20 广东恒润光电有限公司 Novel circuit integrating switching power supply and LED

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