CN214958670U - Antenna isolator, wired network signal device and wired network signal system - Google Patents
Antenna isolator, wired network signal device and wired network signal system Download PDFInfo
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- CN214958670U CN214958670U CN202121409910.7U CN202121409910U CN214958670U CN 214958670 U CN214958670 U CN 214958670U CN 202121409910 U CN202121409910 U CN 202121409910U CN 214958670 U CN214958670 U CN 214958670U
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Abstract
The utility model provides an antenna isolator, wired network signal equipment and wired network signal system, the antenna isolator includes the first link, the first link is used for the ground of connecting device; the second connecting end is used for connecting a signal ground; the isolation branch is connected between the first connecting end and the second connecting end in series; the isolation branch comprises an overcurrent protection module and an isolation capacitor, and the overcurrent protection module and the isolation capacitor are connected between the first connecting end and the second connecting end in series. The technical scheme of the utility model, can avoid outside surge energy and ground potential difference to apply at isolation capacitor both ends and cause to catch fire.
Description
Technical Field
The utility model relates to a TV and communication technology field, in particular to antenna isolator, wired network signal equipment and wired network signal system.
Background
When the I-type equipment (I-type equipment refers to the equipment adopting basic insulation and is also provided with a connecting device, so that conductive parts with dangerous voltage are connected with a protective grounding conductor in a building wiring when the basic insulation fails) and the II-type equipment (II-type equipment refers to the equipment which can not only rely on the basic insulation but also adopt additional safety protection measures for electric shock protection) in a mixed connection, the ground potential difference between a cable network signal ground and an equipment ground of household electric equipment of a user and the instantaneous leakage current caused by surge energy can cause local overheating and ignition, thereby burning equipment such as a set top box or a television set.
In view of this, the existing cable network signal devices such as set-top boxes, televisions, cable modems, etc. usually have built-in or external antenna isolators, for example, the antenna isolator shown in fig. 1 is used to avoid the occurrence of fire accidents caused by imperfect grounding of the cable network.
However, in practice, the wired network signal device with the built-in antenna isolator still has a fire accident, and the burning degree is more serious than that of the wired network signal device without the antenna isolator. The reason for this is that when the isolation capacitor of the antenna isolator is broken down by the surge voltage on the wired network signal ground, the insulation resistance of the isolation capacitor is seriously reduced, so that the ground potential difference releases energy through the isolation capacitor to catch fire, and other flammable components (such as a plastic shell and the like) of the equipment are ignited, thereby causing a fire accident.
SUMMERY OF THE UTILITY MODEL
The utility model provides an antenna isolator, wired network signal equipment and wired network signal system aims at avoiding outside surge energy and ground potential difference to apply at isolation electric capacity both ends and cause to catch fire.
In order to achieve the above object, the present invention provides an antenna isolator, comprising:
the first connecting end is used for connecting a device ground;
the second connecting end is used for connecting a signal ground; and
the isolation branch is connected between the first connecting end and the second connecting end in series;
the isolation branch comprises an overcurrent protection module and an isolation capacitor, and the overcurrent protection module and the isolation capacitor are connected between the first connecting end and the second connecting end in series.
Optionally, the number of the isolation branches is multiple, and the multiple isolation branches are connected in parallel between the first connection end and the second connection end.
Optionally, the overcurrent protection module includes a microstrip line;
the microstrip line and the isolation capacitor are connected in series between the first connecting end and the second connecting end.
Optionally, the isolation capacitor has a withstand voltage of 1 kv, the microstrip line has a copper thickness of 1 ounce, the microstrip line has a width of 3.6 mils to 4.4 mils, and the microstrip line has a length of 2.7 mm to 4.4 mm.
Optionally, the isolation capacitor has a withstand voltage of 2kv, the microstrip line has a copper thickness of 1 ounce, the microstrip line has a width of 3.6 mils to 6.6 mils, and the microstrip line has a length of 2.25 mm to 4.4 mm.
Optionally, the isolation capacitor has a withstand voltage of 3 kv, the microstrip line has a copper thickness of 1 ounce, the microstrip line has a width of 3.6 mils to 8.8 mils, and the microstrip line has a length of 2.25 mm to 4.4 mm.
Optionally, the overcurrent protection module includes a resistor;
the resistor and the isolation capacitor are connected in series between the first connecting end and the second connecting end.
Optionally, the withstand voltage of the isolation capacitor is 1 kilovolt, the resistance value of the resistor is between 20 milliohms and 100 milliohms, the power of the resistor is between 1/20 watts and 1/16 watts, and the overload current of the resistor is between 0 ampere and 30 amperes.
Optionally, the withstand voltage of the isolation capacitor is 2 kilovolts, the resistance value of the resistor is between 20 milliohms and 100 milliohms, the power of the resistor is between 1/20 watts and 1/8 watts, and the overload current of the resistor is between 0 ampere and 50 amperes.
Optionally, the withstand voltage of the isolation capacitor is 3 kilovolts, the resistance value of the resistor is between 20 milliohms and 100 milliohms, the power of the resistor is between 1/20 watts and 1/8 watts, and the overload current of the resistor is between 0 ampere and 50 amperes.
Optionally, the overcurrent protection module includes an inductor;
the inductor and the isolation capacitor are connected in series between the first connecting end and the second connecting end.
Optionally, the withstand voltage of the isolation capacitor is 1 kv, the dc resistance of the inductor is between 0.1 ohm and 0.5 ohm, the operating frequency of the inductor is greater than or equal to 1 ghz, and the overcurrent of the inductor is between 0 ampere and 3 amperes.
Optionally, the withstand voltage of the isolation capacitor is 2kv, the dc resistance of the inductor is between 0.1 ohm and 0.5 ohm, the operating frequency of the inductor is greater than or equal to 1 ghz, and the overcurrent of the inductor is between 0 ampere and 20 amperes.
Optionally, the withstand voltage of the isolation capacitor is 3 kv, the dc resistance of the inductor is between 0.1 ohm and 0.5 ohm, the operating frequency of the inductor is greater than or equal to 1 ghz, and the overcurrent of the inductor is between 0 ampere and 20 amperes.
To achieve the above object, the present invention further provides a wired network signal device, which includes the antenna isolator as described above.
Optionally, the cable network signal device is any one of a modulator, a CMTS device, a mixer, an optical transmitter, an optical receiver, an amplifier, an attenuator, a distributor, a splitter, a set-top box, a cable modem, an EoC device, a TV panel, a cable subscriber line, and a television.
In order to achieve the above object, the present invention further provides a wired network signal system, which includes a signal ground, a device ground and the antenna isolator as described above;
the first connecting end of the antenna isolator is connected with the equipment ground, and the second connecting end of the antenna isolator is connected with the signal ground.
The technical scheme of the utility model, the mode that adopts overcurrent protection module and isolation capacitor to establish ties constitutes the antenna isolator, in case outside surge energy and ground potential difference pass through the antenna isolator, the overcurrent protection module can automatic disconnection in order to cut off the antenna isolator return circuit for outside energy can't last to be exerted and cause the fire incident at isolation capacitor both ends. The antenna isolator has the advantages of simple circuit structure and low cost, and can obviously improve the safety and reliability of wired network signal equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of an exemplary embodiment of an antenna isolator;
fig. 2 is a block diagram of an embodiment of the antenna isolator of the present invention;
fig. 3 is a block diagram of another embodiment of the antenna isolator of the present invention;
fig. 4 is a schematic circuit diagram of an embodiment of the antenna isolator according to the present invention;
fig. 5 is a schematic circuit diagram of another embodiment of the antenna isolator according to the present invention;
fig. 6 is a schematic circuit diagram of another embodiment of the antenna isolator according to the present invention;
fig. 7 is a block diagram of an embodiment of a wired network signal system according to the present invention.
The reference numbers illustrate:
| 1～n | isolation branch | Line1～Line n | Microstrip line | |
| C1～Cn | Isolation capacitor | R1～Rn | Resistance (RC) | |
| L1～ | Inductance | 101～10n | |
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| 100 | |
200 | |
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| 300 | Attenuator | 400 | |
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| 500 | Forward |
600 | Forward |
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| 700 | Reverse |
800 | Reverse |
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| 900 | Amplifier with a high- |
1000 | |
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| 1100 | |
1200 | |
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| 1300 | |
1400 | Cable set- |
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| 1500 | |
1600 | Television receiver |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that if the embodiments of the present invention are described with reference to "first", "second", etc., the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 2 is a block diagram of an embodiment of the present invention.
The antenna isolator comprises an isolation branch 1, a first connecting end connected with a device ground and a second connecting end connected with a signal ground; the isolation branch 1 is connected in series between the first connecting end and the second connecting end; the isolation branch 1 comprises an overcurrent protection module 101 and an isolation capacitor C1, and the overcurrent protection module 101 and the isolation capacitor C1 are connected in series and then connected between a first connection end and a second connection end.
The signal ground, namely the floating ground, is a common end forming a circuit signal loop and is used for providing a common reference potential for all signals in the wired network signal equipment; and the device is divided into three cases: the equipment ground of I-type equipment (such as a modulator, an optical transmitter, a 3-core plug television, a PC and the like) is a protective ground, one end of the protective ground is connected with an equipment shell, and the other end of the protective ground is connected into a power frequency electric protective ground through a 3-core power plug and is reliably connected with the ground. The device ground of the class II device (such as an amplifier, a 2-core plug television, a set-top box, a cable modem and the like) is a direct current ground and is connected with the direct current output negative pole of the power adapter. The device ground of the passive device (such as a distributor, a splitter and the like) is a metal shell of the device.
At present, most cable televisions adopt a set top box access mode, and cable network signals of the cable televisions come from front-end computer room equipment, but the cable network signal ground is not co-grounded with the equipment ground of household appliance equipment. Therefore, when the class I device and the class II device in the cable television network are connected in a mixed manner, the ground potential difference between the cable network signal ground and the device ground of the household electrical appliance device and the instantaneous discharge current caused by the surge energy may cause local overheating and ignition, thereby causing the cable network signal devices such as the set-top box or the television to be burned.
In view of this, the existing cable network signal devices such as set-top boxes, televisions, cable modems, etc. often adopt the design of external or internal antenna isolators to reduce the fire accidents caused by imperfect grounding.
However, in practice, the wired network signal device with the built-in antenna isolator still has a fire accident, and the burning degree is more serious than that of the wired network signal device without the antenna isolator. The reason for this is that when the isolation capacitor of the antenna isolator is broken down by the surge voltage, the insulation resistance of the isolation capacitor is seriously reduced, and the isolation capacitor is equivalent to a short circuit, so that the ground potential difference releases energy through the isolation capacitor to catch fire, and other flammable components (such as a plastic shell and the like) of the equipment are ignited, thereby causing a fire accident.
In order to solve the above problems, the antenna isolator of the present embodiment is formed by connecting the overcurrent protection module 101 and the isolation capacitor C1 in series, and when the antenna isolator is impacted by surge energy, the overcurrent protection module 101 is automatically turned off to prevent external energy from being continuously applied to two ends of the isolation capacitor C1 to cause equipment ignition.
Specifically, when external surge energy (for example, surge energy caused by a lightning strike or other equipment) flows through the antenna isolator, once the current flowing through the antenna isolator exceeds the maximum current allowed by the overcurrent protection module 101, the overcurrent protection module 101 will automatically and instantly blow, so that the loop of the antenna isolator is cut off, and thus the situation that external energy is continuously applied to two ends of the isolation capacitor to cause the equipment to catch fire can be avoided. When the current flowing through the antenna isolator is less than the maximum current allowed by the overcurrent protection module 101, the overcurrent protection module 101 is not fused, thereby ensuring the backflow of the high-frequency signal.
The overcurrent protection module 101 of this embodiment may be formed by a microstrip line and a resistor, such as a 0 ohm resistor or an nH-level radio frequency inductor, so as to achieve the purpose of transmitting a wired network signal, i.e., a high frequency signal, and avoiding ignition of a wired network signal device.
It should be noted that, in order to avoid the influence of the series-connected overcurrent protection module 101 and the isolation capacitor C1 on the backflow of the high-frequency signal, at least 2 coupling capacitors may be disposed nearby the device radio-frequency signal end, for example, 2 coupling capacitors, 3 coupling capacitors, 4 coupling capacitors, etc. may be disposed nearby the device radio-frequency signal end to ensure that the impedance of the backflow path of the high-frequency signal is minimum.
According to the technical scheme of the embodiment, the antenna isolator is formed by connecting the overcurrent protection module 101 and the isolation capacitor C1 in series, once external surge energy passes through the antenna isolator, the overcurrent protection module 101 is automatically disconnected to cut off a loop of the antenna isolator, so that the external energy cannot be continuously applied to two ends of the isolation capacitor to cause a fire accident. The antenna isolator has the advantages of simple circuit structure and low cost, and can obviously improve the safety and reliability of wired network signal equipment.
Optionally, referring to fig. 3, in an embodiment, the antenna isolator includes a plurality of isolation branches 1 to n connected in parallel, for example, 2 isolation branches connected in parallel, and 3 isolation branches … … n isolation branches connected in parallel, and the plurality of isolation branches are connected between the first connection end and the second connection end after being connected in parallel. The circuit structures of the plurality of isolation branches are the same, that is, each isolation branch comprises an overcurrent protection module and an isolation capacitor, and the overcurrent protection module and the isolation capacitor are connected in series between the first connection end and the second connection end, for example, the isolation branch 1 is formed by connecting the overcurrent protection module 101 and the isolation capacitor C1 in series; the isolation branch 2 is formed by connecting an overcurrent protection module 102 and an isolation capacitor C2 in series; the isolation branch n is formed by connecting an overcurrent protection module 10n and an isolation capacitor Cn in series.
The antenna isolator comprises a plurality of isolation branches 1-n connected in parallel, and in such a configuration, when one of the isolation branches is disconnected due to the impact of surge energy, other isolation branches can serve as backup high-frequency signal transmission paths to continue transmitting high-frequency signals, so that wired network signal equipment can normally operate.
It should be understood that because the components, the isolation capacitors, the wires, and the like in the overcurrent protection module are different, when the antenna isolator is impacted by surge energy, the surge energy may first pass through 1-2 isolation branches, for example, the shortest isolation branch may first pass through 1-2 isolation branches. Based on this, when the isolation branch is set to be many, it is equivalent to backup many high-frequency signal transmission paths, thereby effectively improving the stability and reliability of the wired network signal equipment.
It can be understood that the circuit structures of the plurality of isolation branches may also be different, for example, the isolation branch 1 may be formed by connecting microstrip lines and isolation capacitors in series; the isolation branch 2 is formed by connecting a 0 ohm resistor and an isolation capacitor in series to form … … isolation branch n which is formed by connecting an inductor and an isolation capacitor in series. In other embodiments, the circuit structure of each isolation branch can be set according to actual needs.
Optionally, in an embodiment, the overcurrent protection module 101 includes a microstrip line; and the microstrip line and the isolation capacitor are connected in series between the first connecting end and the second connecting end.
If the antenna isolator includes a plurality of isolation branches, each isolation branch may include a microstrip Line and an isolation capacitor, and the circuit structure of the antenna isolator is shown in fig. 4, where lines 1-Line n are microstrip lines, and C1-Cn are isolation capacitors.
The microstrip line is a microwave transmission line formed by a single conductor strip supported on a dielectric substrate.
In practical application, if the maximum through-current of the microstrip line is set to be too large, the risk that the isolation capacitor is broken down and the microstrip line is still not disconnected exists, so that the ground potential difference releases energy through the broken-down isolation capacitor to trigger ignition; if the maximum through-current of the microstrip line is too small, the microstrip line can be automatically disconnected by the extremely small surge energy, so that the high-frequency signal backflow is influenced.
Based on this, according to the technical solution of this embodiment, the maximum through-current Imax of the microstrip line can be determined according to the withstand voltage level of the isolation capacitor, and then the maximum through-current Imax is determined according to experimental data or based on IPC-275 standard formula I ═ K × T0.44*A0.75Parameters such as length and width of the microstrip line are set in a mode of (wherein I is the maximum through-flow of the microstrip line, K is a correction coefficient, an outer layer copper coefficient is 0.048, an inner layer copper coefficient is 0.024, T is temperature rise, a melting point of copper is 1060 ℃, and A is a cross-sectional area). By accurately setting parameters such as length, width and the like of the microstrip line, the microstrip line can not only transmit high-frequency signals efficiently, but also play a role in protection. Specifically, when the antenna isolator is impacted by surge, if the current flowing through the antenna isolator is larger than or equal to Imax, the microstrip line is automatically and instantly fused to cut off a loop of the antenna isolator, so that the condition that external energy is continuously applied to two ends of the isolation capacitor to cause ignition is avoided; if the current flowing through the antenna isolator is less than or equal to Imax, the microstrip line cannot be fused, so that the backflow of high-frequency signals is ensured.
Optionally, in an embodiment, the withstand voltage of the isolation capacitor may be 1 kv, the copper thickness of the microstrip line may be 1 ounce, the width of the microstrip line may be 3.6 mils to 4.4 mils, and the length of the microstrip line may be 2.7 mm to 4.4 mm.
Optionally, in an embodiment, the withstand voltage of the isolation capacitor may be 2kv, the copper thickness of the microstrip line may be 1 ounce, the width of the microstrip line may be 3.6 mils to 6.6 mils, and the length of the microstrip line may be 2.25 mm to 4.4 mm.
Optionally, in an embodiment, the withstand voltage of the isolation capacitor may be 3 kv, the copper thickness of the microstrip line may be 1 ounce, the width of the microstrip line may be 3.6 mils to 8.8 mils, and the length of the microstrip line may be 2.25 mm to 4.4 mm.
In a specific embodiment, specific parameters of the microstrip line are set based on the voltage withstanding grade of the isolation capacitor and combined with theoretical basis and experimental data, so that the antenna isolator formed by the microstrip line and the isolation capacitor can avoid ignition of wired network signal equipment under the impact of surge energy; but also can ensure the transmission quality of the high-frequency signal, thereby obviously improving the quality of wired network signal equipment.
In an alternative embodiment, the antenna isolator further comprises a printed circuit board, and the isolation branch is disposed on the printed circuit board.
Since the current carrying capacity of the printed circuit board is related to the thickness of the printed circuit board, in a specific embodiment, the protective effect of the antenna isolator can be further improved by reasonably setting the thickness of the printed circuit board. Specifically, the thickness of the printed circuit board may be set to 1.2 mm; or, the thickness of the printed circuit board is set to be 1.6 mm, and then the microstrip line with the width in the range of 3.6-4.4 mil and the length in the range of 3.6-4.4 mm is selected, so that the microstrip line has a very good protection effect on the 2.2nF/2KV isolation capacitor.
Optionally, in an embodiment, the overcurrent protection module 101 includes a resistor; and the resistor and the isolation capacitor are connected in series between the first connecting end and the second connecting end.
The resistor can be selected as a 0 ohm resistor, namely a resistor with a standard value of 0 ohm, of course, the resistor can also be a resistor with other resistance values, and the resistor can be specifically set based on the voltage-resistant grade of the isolation capacitor.
If the antenna isolator includes a plurality of isolation branches, and each isolation branch includes a resistor and an isolation capacitor, the circuit structure of the antenna isolator is shown in fig. 5, where R1-Rn are resistors and C1-Cn are isolation capacitors.
In this embodiment, an isolation branch is formed by connecting an isolation capacitor and a resistor in series. Specifically, when external surge energy (such as surge energy caused by lightning strike or other equipment) flows through the antenna isolator, once the current flowing through the antenna isolator exceeds the maximum current allowed to pass through the resistor, the resistor can be automatically and instantly blown, so that the loop of the antenna isolator is cut off, and the condition that the external energy is continuously applied to two ends of the isolation capacitor to cause the equipment to catch fire can be avoided. When the current flowing through the antenna isolator is smaller than the maximum current allowed to pass through the resistor, the resistor cannot be fused, and therefore the backflow of high-frequency signals is guaranteed.
In order to reduce the parasitic inductance, the length of the trace between the resistor and the isolation capacitor should be reduced as much as possible. Optionally, the length of the trace between the resistor and the isolation capacitor may be set to be less than or equal to 20 mils.
Optionally, in an embodiment, the voltage-withstanding value of the isolation capacitor may be 1 kv, the resistance value of the resistor ranges from 20 milli-ohms to 100 milli-ohms, the power range of the resistor ranges from 1/20 watts to 1/16 watts, and the maximum instantaneous overload current range of the resistor is 0 to 30 amperes.
Optionally, in an embodiment, the voltage-withstanding value of the isolation capacitor may be 2kv, the resistance value of the resistor ranges from 20 milli-ohms to 100 milli-ohms, the power range of the resistor ranges from 1/20 watts to 1/8 watts, and the maximum instantaneous overload current range of the resistor is 0 to 50 amperes.
Optionally, in an embodiment, the voltage-withstanding value of the isolation capacitor may be 3 kv, the resistance value of the resistor ranges from 20 milli-ohms to 100 milli-ohms, the power range of the resistor ranges from 1/20 watts to 1/8 watts, and the maximum instantaneous overload current range of the resistor is 0 to 50 amperes.
In a specific embodiment, specific parameters of the resistor are set based on the withstand voltage grade of the isolation capacitor and combined with theoretical basis and experimental data, so that the antenna isolator formed by serially connecting the resistor and the isolation capacitor can prevent wired network signal equipment from catching fire under the impact of surge energy; but also can ensure the transmission quality of the high-frequency signal, thereby obviously improving the quality of wired network signal equipment.
Optionally, in an embodiment, the overcurrent protection module 101 includes an inductor, and the inductor and the isolation capacitor are connected in series between the first connection terminal and the second connection terminal. Optionally, the inductance value of the inductor
≦1nH。
If the antenna isolator includes a plurality of isolation branches, each of which includes an inductor and an isolation capacitor, the circuit structure of the antenna isolator is shown in fig. 6, wherein L1-L n are inductors, and C1-Cn are isolation capacitors.
In this embodiment, an isolation branch is formed by connecting an isolation capacitor and an inductor in series. Specifically, when external surge energy (such as surge energy caused by lightning strike or other equipment) flows through the antenna isolator, once the current flowing through the antenna isolator exceeds the maximum current allowed by the inductor, the inductor can be automatically and instantly blown, so that the loop of the antenna isolator is cut off, and the condition that the external energy is continuously applied to two ends of the isolation capacitor to cause the equipment to catch fire can be avoided. When the current flowing through the antenna isolator is smaller than the maximum current allowed by the inductor L, the inductor cannot be fused, and therefore the backflow of high-frequency signals is guaranteed.
Optionally, in an embodiment, the voltage-withstanding value of the isolation capacitor may be 1 kv, the maximum dc resistance value of the inductor ranges from 0.1 ohm to 0.5 ohm, the operating frequency of the inductor is greater than or equal to 1 ghz, and the maximum instantaneous overload current of the inductor ranges from 0 ampere to 3 amperes.
Optionally, in an embodiment, the voltage-withstanding value of the isolation capacitor may be 2kv, the maximum dc resistance value of the inductor ranges from 0.1 ohm to 0.5 ohm, the operating frequency of the inductor is greater than or equal to 1 ghz, and the maximum instantaneous overload current of the inductor ranges from 0 to 20 amperes.
Optionally, in an embodiment, the voltage-withstanding value of the isolation capacitor may be 3 kv, the maximum dc resistance value of the inductor ranges from 0.1 ohm to 0.5 ohm, the operating frequency of the inductor is greater than or equal to 1 ghz, and the maximum instantaneous overload current of the inductor ranges from 0 to 20 amperes.
In a specific embodiment, specific parameters of the inductor are set based on the withstand voltage grade of the isolation capacitor and combined with theoretical basis and experimental data, so that the antenna isolator formed by the inductor and the isolation capacitor can prevent wired network signal equipment from catching fire under the impact of surge energy; but also can ensure the transmission quality of the high-frequency signal, thereby obviously improving the quality of wired network signal equipment.
It can be understood that when the isolation capacitors with other withstand voltage levels are used, appropriate microstrip lines, resistors or inductors can be set based on the withstand voltage levels of the other isolation capacitors, so that the purposes of ensuring the transmission quality of high-frequency signals, preventing the wired network signal equipment from being ignited, and ensuring the safety and reliability of the wired network signal equipment are achieved.
The utility model also provides a wired network signal device, which comprises the antenna isolator, the detailed structure of the antenna isolator can refer to the above embodiment, which is not described again; it can be understood that, because the utility model discloses an above-mentioned antenna isolator has been used among the wired network signal equipment, consequently, the utility model discloses a wired network signal equipment's embodiment includes all technical scheme of the whole embodiments of above-mentioned antenna isolator, and the technical effect who reaches is also identical, no longer gives unnecessary details here.
The cable network signal device may be any one of a modulator, a CMTS device, a mixer, an optical transmitter, an optical receiver, an amplifier, an attenuator, a distributor, a splitter, a set-top box, a cable modem, an EoC device, a TV panel, a cable subscriber line, and a television, or may be other cable network signal devices such as a set-top box with an ethernet interface, a gateway, a router, and the like, which is not limited herein.
In practical applications, the antenna isolator may be built in cable network signal devices such as a modulator, a CMTS device, a mixer, an optical transmitter, an optical receiver, an amplifier, an attenuator, a distributor, a splitter, a set-top box, a cable modem, an EoC device, a TV panel, a cable TV subscriber line, and a television, that is, the antenna isolator is integrated in cable network signal devices such as a modulator, a CMTS device, a mixer, an optical transmitter, an optical receiver, an amplifier, an attenuator, a distributor, a splitter, a set-top box, a cable modem, an EoC device, a TV panel, a cable TV subscriber line, and a television, so as to protect the cable network signal devices, improve the security and reliability of the cable network signal devices, and ensure the security and reliability of each node of the cable network signal system.
Of course, for convenience of production and maintenance, the antenna isolator may be externally disposed on cable network signals such as a modulator, a CMTS device, a mixer, an optical transmitter, an optical receiver, an amplifier, an attenuator, a distributor, a splitter, a set-top box, a cable modem, an EoC device, a TV panel, a cable television subscriber line, and a television, and the antenna isolator is not limited herein and may be disposed according to actual needs. It is understood that the antenna isolator may be built in or externally installed in other wired network signal devices, such as a set-top box with an ethernet interface, a gateway, and a router, according to the actual requirement, but not limited herein.
The utility model also provides a wired network signal system, including equipment ground, signal ground and as above antenna isolator, this antenna isolator's first link is connected with equipment ground, and antenna isolator's second link is connected with signal ground.
Optionally, referring to fig. 7, the cable network signal system further includes a CMTS device 100, a modulator 200, an attenuator 300, a mixer 400, a forward optical transmitter 500, a forward optical receiver 600, a reverse optical receiver 700, a reverse optical transmitter 800, an amplifier 900, a splitter 1000, a distributor 1100, a TV panel 1200, a cable modem 1300, a cable set-top box 1400, a router 1500, and a television 1600. Wherein, wired network signal passes through mixer QAM modulation, converts the light signal into through forward optical transmitter 500 to the signal of telecommunication, through optic fibre remote transmission back, arrives forward optical receiver 600 and converts the signal of telecommunication into, and the resident's user is connected into to rethread Cable coaxial Cable, through: the amplifier 900, splitter 1000, distributor 1100 distributes the wired network signal to: the set top box 1400, the cable modem 1300, the EoC and other devices convert the cable modem 1300, the EoC and other devices into IP network signals and transmit the IP network signals to the router 1500, the PC and other devices; the device converts the audio and video signals to set top box 1400 and transmits the audio and video signals to television 1600.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (17)
1. An antenna isolator, comprising:
the first connecting end is used for connecting a device ground;
the second connecting end is used for connecting a signal ground; and
the isolation branch is connected between the first connecting end and the second connecting end in series;
the isolation branch comprises an overcurrent protection module and an isolation capacitor, and the overcurrent protection module and the isolation capacitor are connected between the first connecting end and the second connecting end in series.
2. The antenna isolator according to claim 1, wherein the isolation branch is plural, and the plurality of isolation branches are connected in parallel between the first connection end and the second connection end.
3. The antenna isolator according to any of claims 1-2, wherein the over-current protection module comprises a microstrip line;
the microstrip line and the isolation capacitor are connected in series between the first connecting end and the second connecting end.
4. The antenna isolator according to claim 3, wherein the isolation capacitor has a withstand voltage of 1 kV, the microstrip line has a copper thickness of 1 ounce, a width of 3.6 mils to 4.4 mils, and a length of 2.7 mm to 4.4 mm.
5. The antenna isolator according to claim 3, wherein the isolation capacitor has a withstand voltage of 2kv, the microstrip line has a copper thickness of 1 ounce, a width of 3.6 mils to 6.6 mils, and a length of 2.25 mm to 4.4 mm.
6. The antenna isolator according to claim 3, wherein the isolation capacitor has a withstand voltage of 3 kv, the microstrip line has a copper thickness of 1 ounce, a width of 3.6 mils to 8.8 mils, and a length of 2.25 mm to 4.4 mm.
7. The antenna isolator of any one of claims 1-2, wherein the over-current protection module comprises a resistor;
the resistor and the isolation capacitor are connected in series between the first connecting end and the second connecting end.
8. The antenna isolator according to claim 7, wherein the isolation capacitor has a withstand voltage of 1 kv, the resistor has a resistance value between 20 and 100 milliohms, the resistor has a power between 1/20 and 1/16 watts, and the resistor has an overcurrent between 0 and 30 amperes.
9. The antenna isolator according to claim 7, wherein the isolation capacitor has a withstand voltage of 2kv, the resistor has a resistance value of 20 to 100 milli-ohms, the resistor has a power of 1/20 to 1/8 watts, and the resistor has an overcurrent of 0 to 50 amperes.
10. The antenna isolator according to claim 7, wherein the isolation capacitor has a withstand voltage of 3 kv, the resistor has a resistance value of 20 to 100 milli-ohms, the resistor has a power of 1/20 to 1/8 watts, and the resistor has an overcurrent of 0 to 50 amperes.
11. The antenna isolator of any one of claims 1-2, wherein the over-current protection module comprises an inductor;
the inductor and the isolation capacitor are connected in series between the first connecting end and the second connecting end.
12. The antenna isolator according to claim 11, wherein the isolation capacitor has a withstand voltage of 1 kv, the inductor has a dc resistance value between 0.1 ohm and 0.5 ohm, the inductor has an operating frequency greater than or equal to 1 ghz, and the inductor has an overcurrent between 0 and 3 amps.
13. The antenna isolator according to claim 11, wherein the isolation capacitor has a withstand voltage of 2kv, the inductor has a dc resistance value between 0.1 ohm and 0.5 ohm, the inductor has an operating frequency greater than or equal to 1 ghz, and the inductor has an overcurrent between 0 and 20 amps.
14. The antenna isolator according to claim 11, wherein the isolation capacitor has a withstand voltage of 3 kv, the inductor has a dc resistance value between 0.1 ohm and 0.5 ohm, the inductor has an operating frequency greater than or equal to 1 ghz, and the inductor has an overcurrent between 0 and 20 amps.
15. A wired network signal device, characterized in that it comprises an antenna isolator according to any of claims 1-14.
16. The cable network signal device of claim 15, wherein the cable network signal device is any one of a modulator, a CMTS device, a mixer, an optical transmitter, an optical receiver, an amplifier, an attenuator, a distributor, a splitter, a set-top box, a cable modem, an EoC device, a TV panel, a cable subscriber line, and a television.
17. A wired network signal system, characterized in that it comprises a signal ground, a device ground and an antenna isolator according to any of claims 1-14;
the first connecting end of the antenna isolator is connected with the equipment ground, and the second connecting end of the antenna isolator is connected with the signal ground.
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| CN202121409910.7U CN214958670U (en) | 2021-06-23 | 2021-06-23 | Antenna isolator, wired network signal device and wired network signal system |
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| CN202121409910.7U CN214958670U (en) | 2021-06-23 | 2021-06-23 | Antenna isolator, wired network signal device and wired network signal system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022267330A1 (en) * | 2021-06-23 | 2022-12-29 | 深圳创维数字技术有限公司 | Antenna isolator, wired network signal device, and wired network signal system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022267330A1 (en) * | 2021-06-23 | 2022-12-29 | 深圳创维数字技术有限公司 | Antenna isolator, wired network signal device, and wired network signal system |
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