Leaky cable assembly, antenna system, and base station

Abstract

A leaky cable assembly, an antenna system, and a base station, relating to the technical field of communications, which solve the problem of a poor signal coverage capability of a leaky cable assembly. The leaky cable assembly comprises a leakage cable and a power amplifier. The power amplifier is connected between a first section of cable and a second section of cable of the leakage cable. The power amplifier is configured to amplify and process signals transmitted between the first section of cable and the second section of cable. One end of the first section of cable far away from the power amplifier is configured to be in feed connection with a communication system. A first inner conductor or a first outer conductor of the first section of cable is in power supplying connection with the power amplifier. The power amplifier in the leaky cable assembly can amplify a signal, so as to make up for loss when the signal is transmitted in the leakage cable. In addition, power supplying of the power amplifier can also be transmitted by means of the first section of cable, so that use of an additional cable for supplying power to the power amplifier is avoided, thereby reducing layout difficulty of the leaky cable assembly.

Description

Leaky cable assembly, antenna system and base station

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202411032533.8, filed on July 29, 2024, and entitled "Leaky Cable Assembly, Antenna System and Base Station", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular, to a leaky cable assembly, an antenna system and a base station. BACKGROUND

[0004] With the continuous development of railway, highway and other infrastructure projects, the number and length of tunnels have increased significantly. It is difficult for wireless signals emitted by antennas located outside the tunnel to cover the inside of the tunnel. Therefore, when people take trains or cars and other transportation tools through the tunnel, they will face problems such as poor communication or signal interruption. Currently, in order to solve the problem of poor wireless signal coverage in the tunnel, a leaky cable antenna is usually laid in the tunnel. The leaky cable antenna is also called a leaky coaxial cable. Simply put, signals can be transmitted along the length of the leaky cable antenna, and at the same time, can also be leaked outward through the slits of the leaky cable antenna. That is, the leaky cable antenna can not only play a signal transmission function, but also can radiate electromagnetic waves outward. In practical applications, as the signals in the leaky cable antenna continuously leak, the strength of the signals is continuously weakened, which affects the performance of the antenna, and even cannot achieve effective coverage of the signals. SUMMARY

[0005] The present application provides a leaky cable assembly, an antenna system and a base station with good signal coverage performance.

[0006] In a first aspect, the present application provides a leaky cable assembly, comprising a leaky cable and a power amplifier. The leaky cable comprises a first cable segment and a second cable segment, and the power amplifier is connected between the first cable segment and the second cable segment, and is configured to amplify signals transmitted between the first cable segment and the second cable segment. The first cable segment comprises a first inner conductor, a first insulator and a first outer conductor arranged in sequence from inside to outside. The first outer conductor has a first radiation slot penetrating through the thickness of the first outer conductor. When a communication signal is transmitted in the first cable segment, the communication signal can be radiated as a wireless signal outward through the first radiation slot, or receive a wireless signal from the outside, so as to realize the function of transmitting and receiving the wireless signal. The second cable segment comprises a second inner conductor, a second insulator and a second outer conductor arranged in sequence from inside to outside. The second outer conductor has a second radiation slot penetrating through the thickness of the second outer conductor. When a communication signal is transmitted in the second cable segment, the communication signal can be radiated as a wireless signal outward through the second radiation slot, or receive a wireless signal from the outside, so as to realize the function of transmitting and receiving the wireless signal. The end of the first cable segment away from the power amplifier is configured to be connected to a communication system, and the first inner conductor or the second outer conductor is connected to the power amplifier for power supply, so as to meet the power demand of the power amplifier. In the leaky cable assembly provided by the present application, the power amplifier can be configured to amplify the signal to compensate for the loss of the signal transmitted in the leaky cable. In specific applications, the power amplifier can amplify the uplink signal, or the power amplifier can amplify the downlink signal. Alternatively, the power amplifier can amplify both the uplink signal and the downlink signal. In addition, in the leaky cable assembly provided by the present application, the power supply of the power amplifier can also be transmitted through the first cable segment, so as to avoid using an additional cable to supply power to the power amplifier, which is conducive to reducing the difficulty of laying the leaky cable assembly.

[0007] In a specific configuration, the power amplifier comprises a power amplification circuit and a power supply circuit. The power amplification circuit is connected in signal with the first cable segment and the second cable segment. The power amplification circuit is configured to amplify the signals between the first cable segment and the second cable segment. One end of the power supply circuit is connected to the first inner conductor or the first outer conductor, and the other end of the power supply circuit is connected to the power amplification circuit for supplying power to the power amplification circuit. Alternatively, it can be understood that an external power supply can supply power to the power amplifier through the first outer conductor of the first cable segment, or the power supply can supply power to the power amplifier through the first inner conductor of the first cable segment. Alternatively, the power supply can supply power to the power amplifier through the first inner conductor and the first outer conductor of the first cable segment.

[0008] In an example, the first circuit includes a first port, a second port and a third port, and a capacitor is arranged between the first port and the second port, and an inductor is arranged between the first port and the third port. The first port is connected with the first cable segment, the second port is connected with the power amplification circuit of the power amplifier, and the third port is connected with the power supply circuit of the power amplifier. The communication signal in the first cable segment can be transmitted to the power amplification circuit through the second port, so that the power amplification circuit can amplify and process the communication signal. In addition, the direct current transmitted in the first cable segment can be transmitted to the power supply circuit through the third port, and then the direct current is provided to the power amplification circuit by the power supply circuit to meet the power supply requirement of the power amplification circuit.

[0009] In an example, the leaky cable assembly further includes a first circuit, one end of the first circuit being connected with the first cable segment and the other end being connected with the power amplification circuit and the power supply circuit. The first circuit is used to realize the signal connection between the first cable segment and the power amplification circuit, and is also used to realize the power supply connection between the power supply circuit and the first cable segment. Alternatively, the first circuit has the function of shunt, and can be used to provide the alternating communication signal in the first cable segment to the power amplification circuit for amplification processing. In addition, the first circuit is also used to provide the direct current of the first cable segment to the power supply circuit to supply power to the power amplification circuit.

[0010] In a specific arrangement, the first circuit is a bias tee or other circuit or device having the above functions. In addition, in a specific arrangement, the first circuit can be integrated in the power amplifier, or the first circuit can also be an independent circuit or device.

[0011] In an example, the power amplifier includes a first connector and a second connector. When the first circuit is integrated in the power amplifier, the first connector is connected with the first cable segment by plug-in or welding, and the second connector is connected with the second cable segment by plug-in or welding. The plug-in connection facilitates the connection convenience between the power amplifier and the first cable segment and the second cable segment. Alternatively, the welding connection has better connection reliability. In specific applications, the connection mode between the power amplifier, the first cable segment and the second cable segment can be reasonably selected according to actual requirements.

[0012] When the first circuit is independent of the power amplifier, the first circuit is connected between the first cable segment and the power amplifier. The first connector of the power amplifier can be connected with the first circuit by plug-in or welding.

[0013] In an example, the leaky cable assembly further comprises a protective sleeve covering the connection between the power amplifier and the first cable segment. In addition, in a specific arrangement, a protective sleeve can also be arranged at the connection between the power amplifier and the second cable segment. The protective sleeve can effectively improve the sealing or insulation of the connection, and is conducive to improving the working stability and reliability of the leaky cable assembly.

[0014] In an example, the leaky cable assembly further comprises a radiation assembly connected to the end of the second cable segment away from the power amplifier, and the maximum radiation direction of the radiation assembly is away from the power amplifier.

[0015] When the radiation assembly comprises a plurality of radiators with different working frequency bands, the leaky cable assembly further comprises a plurality of filters, and the plurality of radiators are respectively connected to the power amplifier through the plurality of filters. In detail, the plurality of radiators can comprise at least two radiators with different working frequency bands, or at least two radiators with the same working frequency band.

[0016] In a specific application, the power amplifier can amplify signals of a certain frequency band, or can amplify signals of all frequency bands. That is, the power amplifier is used to amplify signals in at least one filter. In this case, the number of radiators can be the same as the number of filters, and each radiator corresponds to one filter. Alternatively, radiators with the same working frequency band in the radiation assembly can be connected to the power amplifier through the same filter.

[0017] In a specific arrangement, the filter can be integrated in the power amplifier. Alternatively, the filter can also be integrated with the radiation assembly. Alternatively, the filter can also be an independent device.

[0018] In a second aspect, the present application also provides an antenna system comprising a communication system, a power supply, and at least one leaky cable assembly as described above. The feed network is connected to the end of the first cable segment away from the power amplifier. The first inner conductor of the first cable segment is connected to the power amplifier and the power supply for power supply, or the first outer conductor of the first cable segment is connected to the power amplifier and the power supply for power supply. The power supply can supply power to the power amplifier in the leaky cable assembly through the first cable segment, thereby meeting the power demand of the power amplifier.

[0019] In an example, the antenna system further comprises a second circuit, one end of the second circuit is connected with the first cable, and the other end is connected with the communication system and the power supply. The second circuit is configured to realize signal connection between the first cable and the communication system, and to realize power supply connection between the power supply and the first cable. Alternatively, it can be understood that the second circuit has a combining function, and is configured to provide the alternating communication signal in the communication system to the first cable, and to provide the direct current power supply provided by the power supply to the first cable, so that the communication signal and the power supply can be transmitted in the first cable at the same time.

[0020] In an example, the second circuit comprises a first port, a second port and a third port, a capacitor is arranged between the first port and the second port, and an inductor is arranged between the first port and the third port. The first port is connected with the first cable, the second port is connected with the communication system, and the third port is connected with the power supply. The second circuit can combine the communication signal and the power supply, so that the communication signal and the power supply can be transmitted to the power amplifier through the coaxial cable at the same time.

[0021] In an example, the first port of the first circuit and the first port of the second circuit are connected with the inner conductor or the outer conductor of the first cable. The signal connection and the power supply connection between the first circuit, the second circuit and the first cable are realized. Alternatively, the first port of the first circuit and the first port of the second circuit are connected with the inner conductor and the outer conductor of the first cable. The signal connection and the power supply connection between the first circuit, the second circuit and the first cable are realized.

[0022] In a specific application, the second circuit is a biasing device or other circuit or device having the above functions.

[0023] In a specific application, the communication system comprises a radio remote unit and a multi-system access platform, and the radio remote unit is connected with the first cable through the multi-system access platform.

[0024] In an example, the second circuit can be integrated with the multi-system access platform. Alternatively, the second circuit can be an independent circuit or device.

[0025] In an example, the communication system further comprises a baseband processing unit, and the baseband processing unit is connected with the radio remote unit.

[0026] In a third aspect, the application further provides a base station, comprising a base station antenna and any of the above antenna systems, and the base station antenna is connected with the communication system in the antenna system. In the base station provided by the application, the above antenna system and the base station antenna are provided, so that the signal coverage of the tunnel and other hollow environments and external environments can be effectively realized, and the signal transceiving performance is good. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a schematic diagram of an application scenario of a leaky cable assembly provided by an embodiment of the present application;

[0028] Fig. 2 is a schematic diagram of an application scenario of an antenna system provided by an embodiment of the present application;

[0029] Fig. 3 is a structural diagram of a conventional leaky cable assembly provided by an embodiment of the present application;

[0030] Fig. 4 is a schematic diagram of an exploded structure of a leaky cable provided by an embodiment of the present application;

[0031] Fig. 5 is a schematic diagram of a structure of an antenna system provided by an embodiment of the present application;

[0032] Fig. 6 is a structural block diagram of an antenna system provided by an embodiment of the present application;

[0033] Fig. 7 is a circuit diagram of a first circuit provided by an embodiment of the present application;

[0034] Fig. 8 is a circuit diagram of a second circuit provided by an embodiment of the present application;

[0035] Fig. 9 is a schematic diagram of an exploded structure of a leaky cable assembly provided by an embodiment of the present application;

[0036] Fig. 10 is a schematic diagram of a partial structure of an antenna system provided by an embodiment of the present application;

[0037] Fig. 11 is a schematic diagram of a structure of an end-fire array antenna provided by an embodiment of the present application;

[0038] Fig. 12 is a radiation pattern of an end-fire array antenna provided by an embodiment of the present application;

[0039] Fig. 13 is a schematic diagram of another structure of an antenna system provided by an embodiment of the present application;

[0040] Fig. 14 is a schematic diagram of another structure of an antenna system provided by an embodiment of the present application;

[0041] Fig. 15 is a schematic diagram of an application scenario of a base station provided by an embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

[0043] In order to facilitate understanding of the leaky cable assembly and the antenna system provided by the embodiments of the present application, the application scenario thereof will be first introduced below.

[0044] The leaky cable assembly and the antenna system provided by the embodiments of the present application can be applied in a hollow environment such as a high-speed rail tunnel, a highway tunnel, a submarine tunnel, a subway tunnel, and the like, to achieve effective coverage of wireless signals in the hollow environment.

[0045] As shown in FIG. 1, with the continuous development of infrastructure projects such as railways and highways, the number and length of tunnels T in mountains have increased significantly. Wireless signals emitted by a base station antenna 01 located outside the tunnel T are difficult to cover into the tunnel T. Therefore, when people take trains or vehicles such as cars through the tunnel T, they will face problems such as poor communication or signal interruption. At present, in order to solve the problem of poor coverage of wireless signals in the tunnel T, a leaky cable assembly is usually laid in the tunnel T. The leaky cable assembly can achieve effective coverage of wireless signals in the tunnel, thereby making up for the signal coverage blind area of the base station antenna 01.

[0046] As shown in FIG. 2, in this scenario, a communication system 001, the base station antenna 01, and the leaky cable assembly 02 are included. The communication system 001 is connected to the base station antenna 01 through a coupler 03, to send radio frequency signals to the base station antenna 01 or receive wireless signals received by the base station antenna 01. In addition, the communication system 001 is connected to the leaky cable assembly 02 through the coupler 03, a repeater near-end machine 04, and a repeater far-end machine 05, to send radio frequency signals to the leaky cable assembly 02 or receive wireless signals received by the leaky cable assembly 02. That is, the base station antenna 01 can effectively cover the space outside the tunnel T, and the leaky cable assembly 02 can effectively cover the space inside the tunnel T. It can be understood that in some application scenarios such as submarine tunnels, the base station antenna 01 can also be omitted, which is not described in detail here.

[0047] In specific applications, the communication system 001 can be used to send feed signals to the base station antenna 01 and the leaky cable assembly 02, to radiate wireless signals outward through the base station antenna 01 and the leaky cable assembly 02. In addition, the communication system 001 can also receive wireless signals received by the base station antenna 01 and the leaky cable assembly 02, and perform operations and other processing thereon. In the example provided in FIG. 2, the coupler 03, the repeater near-end machine 04, and the repeater far-end machine 05 are not included in the communication system 001. In other examples, the coupler 03, the repeater near-end machine 04, and the repeater far-end machine 05 can also be considered as components of the communication system 001. Alternatively, it can be understood that the communication system 001 is connected to the front end of the leaky cable assembly 02, and is a general term for functional devices capable of providing radio frequency signals to the leaky cable assembly 02 and receiving the functions of the leaky cable assembly 02.

[0048] The communication system 001 can be located in a base station subsystem (BBS), a universal terrestrial radio access network (UTRAN), or an evolved universal terrestrial radio access network (E-UTRAN), and is used for cell coverage of wireless signals to realize communication between a terminal device and a wireless network. Specifically, the communication system 001 can be a base transceiver station (BTS) in a global system for mobile communication (GSM) or a code division multiple access (CDMA) system, a node B (NodeB, NB) in a wideband code division multiple access (WCDMA) system, an evolutional NodeB (eNB or eNodeB) in a long term evolution (LTE) system, a wireless controller in a cloud radio access network (CRAN) scenario, or a relay station, an access point, a vehicle-mounted device, a wearable device, a gNodeB (gNB) in a new radio (NR) system, or a base station in a future evolved network, and the like. The embodiments of the present application are not limited.

[0049] The leaky cable assembly 02 in this application can also be applied in an access network device, which is also sometimes referred to as an access node. The access network device has a wireless transceiving function for communicating with a terminal. The access network device includes, but is not limited to, a base station in the above-mentioned communication system, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5G mobile communication system, an access network device or a module of an access network device in a future communication network, an open access network ORAN (open RAN, ORAN) system, or an access node in a future mobile communication system or a WiFi system, etc. The access network device can also be a module or unit capable of realizing part of the function of a base station. For example, the access network device can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. described below. Among them, in the ORAN system, the CU can also be referred to as an O-CU, the DU can also be referred to as an open (O)-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. The access network device can be a macro base station, a micro base station or an indoor station, a relay node or a donor node, or a wireless controller in a cloud radio access network (CRAN) scenario. Optionally, the access network device can also be a server, a wearable device, or a vehicle-mounted device, etc. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU). Multiple access network devices in a communication system can be the same type of base station or different types of base stations. The base station can communicate with the terminal, or communicate with the terminal through a relay station. The terminal can communicate with multiple base stations in different access technologies.

[0050] As shown in FIG. 3, in the current leaky cable assembly 02, the leaky cable 021 and a load 022 located at one end of the leaky cable 021 can be included. Among them, the repeater remote machine 05 is connected in power supply with one end of the leaky cable 021, and the load 022 is connected at the end of the leaky cable 021 away from the repeater remote machine 05, for consuming the remaining energy to reduce the echo reflection, so as to ensure the signal transmission performance of the leaky cable 021. Assuming that the total length of the tunnel T is about S, the length of the leaky cable 021 is also about S, so that the leaky cable 021 can provide effective signal coverage to the space in the tunnel T.

[0051] Among them, the leaky cable 021 is also called leaky cable antenna, which has the functions of signal transmission and wireless signal transmission and reception. That is, the signal can be transmitted in the leaky cable 021 along the length direction of the leaky cable 021, and the leaky cable 021 can also realize the function of wireless signal transmission and reception through its own radiation slot.

[0052] For example, in the process of signal transmission in the leaky cable 021 from one end (such as the left end in FIG. 3) to the other end (such as the right end in FIG. 3), the signal inside the leaky cable 021 can also be radiated outward through the radiation slot in the leaky cable 021, thereby covering the space in the tunnel T. In actual application, the intensity of the signal in the leaky cable 021 will decrease during transmission, and therefore the radiation ability of the signal will also decrease, which is not conducive to ensuring the signal coverage performance of the whole tunnel T.

[0053] Therefore, the embodiments of the present application provide a leaky cable assembly which can effectively improve the signal transmission and reception performance, and an antenna system equipped with the leaky cable assembly.

[0054] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0055] As shown in FIG. 4, in an example provided by the present application, the leaky cable assembly 10 includes a leaky cable 11 and a power amplifier 12. Among them, the leaky cable 11 includes a first section of cable 11a and a second section of cable 11b, and the power amplifier 12 is connected between the first section of cable 11a and the second section of cable 11b, and the power amplifier 12 is used for amplifying the signal transmitted between the first section of cable 11a and the second section of cable 11b.

[0056] As shown in FIG. 4, the first cable 11a includes a first inner conductor 111a, a first insulator 112a, a first outer conductor 113a and a first protective layer 114a arranged in sequence from inside to outside. The first outer conductor 113a has a first radiation slot 1131a penetrating through the thickness thereof. The first inner conductor 111a and the first outer conductor 113a can be made of copper, aluminum or other conductive materials. The first insulator 112a can be made of polyethylene, nylon or other materials with good insulation and chemical stability. The first insulator 112a is located between the first inner conductor 111a and the first outer conductor 113a, which can ensure the connection stability between the first inner conductor 111a and the first outer conductor 113a. The first protective layer 114a is usually made of polyvinyl chloride, polytetrafluoroethylene or other insulating materials. The first protective layer 114a can effectively protect the first outer conductor 113a, and the first protective layer 114a has good rigidity, which can prevent the first cable 11a from being excessively bent under external force, thereby improving the use effect and reliability of the first cable 11a.

[0057] When the communication signal is transmitted in the first cable 11a, the first radiation slot 1131a can radiate wireless signals outward or receive wireless signals from the outside, thereby realizing the function of transmitting and receiving wireless signals. It can be understood that in actual application, a plurality of first radiation slots 1131a are arranged in the first outer conductor 113a along the length direction of the first cable 11a. In specific arrangement, the size, spacing and other parameters of the first radiation slot 1131a can be reasonably set according to actual needs, which is not limited in the present application.

[0058] The second cable 11b includes a second inner conductor 111b, a second insulator 112b, a second outer conductor 113b and a second protective layer 114b arranged in sequence from inside to outside. The second outer conductor 113b has a second radiation slot 1131b penetrating through the thickness thereof. The second inner conductor 111b and the second outer conductor 113b can be made of copper, aluminum or other conductive materials. The second insulator 112b can be made of polyethylene, nylon or other materials with good insulation and chemical stability. The second insulator 112b is located between the second inner conductor 111b and the second outer conductor 113b, which can ensure the connection stability between the second inner conductor 111b and the second outer conductor 113b. The second protective layer 114b is usually made of polyvinyl chloride, polytetrafluoroethylene or other insulating materials. The second protective layer 114b can effectively protect the second outer conductor 113b, and the second protective layer 114b has good rigidity, which can prevent the second cable 11b from being excessively bent under external force, thereby improving the use effect and reliability of the second cable 11b.

[0059] Please refer to FIG. 4 and FIG. 5. The antenna system 20 comprises a communication system 21, a power supply 22 and the leakage cable assembly 10. The first cable 11a is connected to the communication system 21 at the end away from the power amplifier 12. The communication signal can be transmitted between the first inner conductor 111a and the first outer conductor 113a to realize the signal transmission between the communication system 21 and the leakage cable 11. In addition, the first inner conductor 111a or the first outer conductor 113a is connected to the power supply of the power amplifier 12. When the power supply 22 is connected to the first inner conductor 111a or the first outer conductor 113a, the direct current provided by the power supply 22 can be transmitted to the power amplifier 12 through the first cable 11a to meet the power demand of the power amplifier 12.

[0060] When the communication signal is transmitted in the second cable 11b, the wireless signal can be radiated outward through the second radiation slot 1131b or received from the outside to realize the function of transmitting and receiving the wireless signal. It can be understood that in actual application, a plurality of second radiation slots 1131b are arranged in the second outer conductor 113b along the length direction of the second cable 11b. In specific arrangement, the size, spacing and other parameters of the second radiation slot 1131b can be reasonably set according to actual needs, which is not limited in the present application.

[0061] Alternatively, it can be understood that the uplink signal or the downlink signal will be lost when transmitted in the leakage cable 11. In the examples provided in the present application, the power amplifier 12 is arranged between the first cable 11a and the second cable 11b to enhance the uplink signal or the downlink signal to compensate for the loss caused by the transmission of the signal in the first cable 11a or the second cable 11b, thereby ensuring the signal transmitting and receiving performance of the leakage cable assembly 10.

[0062] It should be noted that in actual application, the power amplifier 12 can amplify the uplink signal or the downlink signal, or the power amplifier 12 can amplify both the uplink signal and the downlink signal.

[0063] In addition, in the examples provided in the present application, the first cable 11a also has the transmission function of power supply, so as to supply power to the power amplifier 12. That is, the first cable 11a not only has the transmission function of the communication signal and the function of transmitting and receiving the wireless signal, but also has the transmission ability of the electric energy.

[0064] In specific arrangement, the communication system 21 can be used to send the feeding signal to the leakage cable assembly 10 to radiate the wireless signal outward through the leakage cable assembly 10. In addition, the communication system 21 can also receive the wireless signal received by the leakage cable assembly 10 and process it. The devices or components contained in the communication system 21 can be various.

[0065] For example, as shown in FIG. 6, in one example provided by the present application, a communication system 21 includes a baseband processing unit 211 (BBU), a radio frequency remote unit 212 (RRU), a multi-system access platform 213 (POI), and a second circuit 214. The baseband processing unit 211 can also be referred to as a baseband unit, which is used to access the communication network of an operator. The radio frequency remote unit 212 can also be referred to as a radio frequency processing unit, which can be used to provide the intermediate frequency signal transmitted by the baseband processing unit 211 to the multi-system access platform 213 through up-conversion and amplification. The multi-system access platform 213 is used to combine the signals of different operators and provide them to the second circuit 214. Alternatively, the multi-system access platform 213 can be used to split the combined signals of the second circuit 214 and access the radio frequency remote units 212 and baseband processing units 211 of different operators. Alternatively, it can be understood that in the communication system 21 provided by the present application, the communication system 21 can have the functions of the baseband processing unit 211, the radio frequency remote unit 212, and the multi-system access platform 213 described above. In summary, the communication system 21 has the function of accessing the communication network of an operator, and also has the function of transmitting the feed signal to the leaky cable assembly 10, and also has the function of processing the communication signal received by the leaky cable assembly 10, etc.

[0066] In addition, it should be noted that in the example provided in FIG. 6, the power supply 22 is a separate device or equipment. In other examples, the power supply 22 can also be integrated into the radio frequency remote unit 212. In addition, when the power supply 22 is also integrated into the radio frequency remote unit 212, the radio frequency remote unit 212 and the multi-system access platform 213 are in communication connection, and the power supply provided by the radio frequency remote unit 212 can be connected to the second circuit 214 through a cable.

[0067] In addition, in actual application, the baseband processing unit 211, the radio frequency remote unit 212, the multi-system access platform 213, the second circuit 214, and the power supply 22 can be installed in the same space region. Alternatively, the baseband processing unit 211 can also be deployed remotely, and the baseband processing unit 211 and the radio frequency remote unit 212 can be connected through an optical fiber or other cable with communication signal transmission function.

[0068] In addition, the second circuit 214 is connected to the power supply 22, so that the direct current provided by the power supply 22 can be provided to the power amplifier 12 through the second circuit 214 for power supply.

[0069] Specifically, the communication signal of the multi-system access platform 213 and the power supply of the power supply device 22 are combined in the second circuit 214, so that the communication signal and the power supply can be simultaneously transmitted through the first section of cable 11a. The second circuit 214 can be integrated with the multi-system access platform 213, or the second circuit 214 can also be an independent circuit or device.

[0070] In addition, as shown in FIG. 6, in the examples provided in the present application, the power amplifier 12 includes a first circuit 121, a power amplification circuit 122, and a power supply circuit 123. One end of the first circuit 121 is connected with the first section of cable 11a, and the other end is connected with the power amplification circuit 122 and the power supply circuit 123. The first circuit 121 is used to realize the signal connection between the first section of cable 11a and the power amplification circuit 122, and is also used to realize the power supply connection between the power supply circuit 123 and the first section of cable 11a. That is, the first circuit 121 can split the communication signal and the power supply transmitted in the first section of cable 11a, so as to realize the signal connection between the first section of cable 11a and the power amplification circuit 122, so that the power amplification circuit 122 can amplify the communication signal. In addition, the first circuit 121 can realize the power supply connection between the first section of cable 11a and the power supply circuit 123, so that the power supply circuit 123 can supply power to the power amplification circuit 122. In addition, the end of the second section of cable 11b (i.e. the end away from the power amplifier 12) is also connected with a load 13, which can include resistors and other devices, used to consume the energy at the end of the second section of cable 11b, so as to reduce the return loss. In specific settings, the load 13 can be selected from the commonly used types, and the present application does not make any limitation.

[0071] In specific settings, the circuit structure of the first circuit 121 can be various.

[0072] For example, as shown in FIG. 7, in one example provided by the present application, the first circuit 121 includes a first port 121a, a second port 121b and a third port 121c. In addition, a capacitor C is arranged between the first port 121a and the second port 121b, and an inductor S is arranged between the first port 121a and the third port 121c. The capacitor C has a conductive effect on alternating communication signals and a blocking effect on direct current. The inductor S has a blocking effect on alternating communication signals and a conductive effect on direct current. The first port 121a is connected with the first segment cable 11a, thus the communication signals in the first segment cable 11a can be transmitted to the power amplification circuit 122 through the second port 121b, so that the power amplification circuit 122 can amplify the communication signals. In addition, the direct current transmitted in the first segment cable 11a can be transmitted to the power supply circuit 123 through the third port 121c, and then the power supply circuit 123 provides the direct current to the power amplification circuit 122 to meet the power supply requirement of the power amplification circuit 122.

[0073] Correspondingly, as shown in FIG. 8, in one example provided by the present application, the second circuit 214 includes a first port 214a, a second port 214b and a third port 214c. A capacitor C is arranged between the first port 214a and the second port 214b, and an inductor L is arranged between the first port 214a and the third port 214c. The first port 214a is connected with the first segment cable 11a, and the second port 214b is connected with the multi-system access platform 213 in the communication system 21, thus the alternating communication signals can be transmitted to the first segment cable 11a through the second port 214b and the first port 214a. In addition, the third port 214c is connected with the power supply 22, thus the direct current can be transmitted to the first segment cable 11a through the third port 214c and the first port 214a.

[0074] In summary, the second circuit 214 can combine the communication signals and the power supply, so that the communication signals and the power supply can be transmitted to the power amplifier 12 through the first segment cable 11a. The first circuit 121 can separate the communication signals and the power supply, so that the communication signals can be transmitted to the power amplification circuit 122 in the power amplifier 12 for amplification processing. The direct current power supply can be transmitted to the power supply circuit 123 in the power amplifier 12 to supply power to the power amplification circuit 122.

[0075] It should be noted that the communication signals between the communication system 21 and the power amplifier 12 are bidirectional transmission, i.e. the communication signals in the communication system 21 can be transmitted to the power amplifier 12 through the first segment cable 11a, and the communication signals in the power amplifier 12 can also be transmitted to the communication system 21 through the first segment cable 11a.

[0076] In a specific arrangement, the first circuit 121 and the second circuit 214 can be a bias tee (BT). Alternatively, the first circuit 121 and the second circuit 214 can also adopt other circuit structures, which are not described herein.

[0077] In addition, in a specific arrangement, the power amplification circuit 122 can include electronic components such as capacitors, inductors, transistors, etc. In a specific arrangement, the specific circuit structure in the power amplification circuit 122 can be reasonably selected and arranged according to actual needs, which is not limited in the present application.

[0078] In addition, the power supply circuit 123 can include electronic components such as resistors and capacitors, and in a specific arrangement, the specific circuit structure in the power supply circuit 123 can be reasonably selected and arranged according to actual needs, which is not limited in the present application.

[0079] In a specific arrangement, the first port 121a in the first circuit 121 and the first port 214a in the second circuit 214 can be connected with the first outer conductor 113a of the first segment cable 11a, so that the direct current provided by the power supply 22 can be supplied to the power amplifier 12 through the first outer conductor 113a. Alternatively, the first port 121a in the first circuit 121 and the first port 214a in the second circuit 214 can be connected with the first inner conductor 111a of the first segment cable 11a, so that the direct current provided by the power supply 22 can be supplied to the power amplifier 12 through the first inner conductor 111a. Alternatively, the first port 121a in the first circuit 121 and the first port 214a in the second circuit 214 can be connected with the first inner conductor 111a and the first outer conductor 113a of the first segment cable 11a, so that the direct current provided by the power supply 22 can be supplied to the power amplifier 12 through the first inner conductor 111a and the first outer conductor 113a. In a specific arrangement, the connection relationship between the first circuit 121, the second circuit 214 and the first segment cable 11a can be reasonably arranged according to actual needs, which is not described herein. In addition, the first circuit 121 can be integrated in the power amplifier 12, or can be separately configured.

[0080] In addition, as shown in FIG. 9, when the first circuit 121 is integrated inside the power amplifier 12, the power amplifier 12 can include a first connector 120a and a second connector 120b. The first connector 120a can be connected with one end of the first cable 11a to realize the signal connection and power supply connection between the power amplifier 12 and the first cable 11a. The second connector 120b can be connected with the second cable 11b to realize the signal connection between the power amplifier 12 and the second cable 11b. The connection by plugging is conducive to realizing the quick connection between the power amplifier 12 and the first cable 11a and the second cable 11b, and has a good connection effect. In other examples, the power amplifier 12 and the first cable 11a can also be connected by welding or the like, and the power amplifier 12 and the second cable 11b can also be connected by welding or the like, which will not be described here.

[0081] It should be noted that when the first circuit 121 is an independent device, the first circuit 121 can also be configured with a structure similar to the above-mentioned first connector and second connector. That is, the first circuit 121 can be connected between the first cable 11a and the power amplifier 12, and the first circuit 121 can be plugged with the first cable 11a or plugged with the power amplifier 12.

[0082] In addition, when the second circuit 214 is an independent device, the second circuit 214 can also be configured with a structure similar to the above-mentioned first connector. That is, the second circuit 214 can be connected with the first cable 11a by plugging.

[0083] In addition, as shown in FIG. 9, in order to ensure the connection reliability between the power amplifier 12 and the first cable 11a. In the examples provided in the present application, the connection between the power amplifier 12 and the first cable 11a can also be effectively covered by a protective sleeve 15 to ensure the airtightness of the connection between the power amplifier 12 and the first cable 11a. Wherein the protective sleeve 15 can be a heat shrink tube, an insulating sleeve, etc. In specific applications, the specific type and material of the protective sleeve 15 can be reasonably selected according to actual needs. In addition, in order to ensure the connection reliability between the power amplifier 12 and the second cable 11b. In the examples provided in the present application, the connection between the power amplifier 12 and the second cable 11b can also be effectively covered by a protective sleeve 16 to ensure the airtightness of the connection between the power amplifier 12 and the second cable 11b. Wherein the protective sleeve 16 can be a heat shrink tube, an insulating sleeve, etc. In specific applications, the specific type and material of the protective sleeve 16 can be reasonably selected according to actual needs.

[0084] In addition, in specific applications, the leakage cable 11 can work in one frequency band or multiple frequency bands. In specific applications, the working frequency band of the leakage cable 11 can be reasonably selected and adjusted according to actual needs.

[0085] In addition, in the above examples, the end of the second section of the cable 11b is provided with a load 13, which is exemplarily described. In other examples, the load 13 can be replaced by a radiation component with signal transceiving performance. In addition, the radiation component 13 can include one radiator or multiple radiators. When the radiation component 13 includes multiple radiators, the working frequency bands of the multiple radiators can be the same or different.

[0086] For example, as shown in FIG. 10, in the examples provided in the present application, the radiation component 13 includes two radiators, namely, a radiator 131 and a radiator 132, and the working frequency bands of the radiator 131 and the radiator 132 are different. For example, the working frequency band of the radiator 131 can be about 3.5 GHz, and the working frequency band of the radiator 132 can be about 2.6 GHz. In specific settings, the radiator 131 can be connected to the power amplifier 12 through the filter 14a, and the radiator 132 can be connected to the power amplifier 12 through the filter 14b. The filter 14a and the filter 14b can be band-pass filters, the filter 14a is used for passing signals in the frequency band of about 3.5 GHz and blocking signals in other frequency bands. The filter 14b is used for passing signals in the frequency band of about 2.6 GHz and blocking signals in other frequency bands.

[0087] In specific applications, the power amplifier 12 can amplify signals in one frequency band, or amplify signals in multiple frequency bands or all frequency bands.

[0088] For example, the power amplifier 12 can amplify signals in the frequency band of 3.5 GHz, but not amplify signals in the frequency band of 2.6 GHz. Alternatively, the power amplifier 12 can amplify signals in the frequency band of 2.6 GHz, but not amplify signals in the frequency band of 3.5 GHz. Alternatively, the power amplifier 12 can amplify signals in the frequency bands of 2.6 GHz and 3.5 GHz. In specific settings, the amplification frequency band of the power amplifier 12 can be reasonably set according to actual conditions.

[0089] In addition, the power amplifier 12 can amplify uplink signals, or amplify downlink signals, or amplify both uplink signals and downlink signals. In addition, the filter can be independently configured. Alternatively, the filter can be integrally arranged with the radiation component 13, or the filter can be integrally arranged in the power amplifier 12.

[0090] In a specific arrangement, the radiator in the radiation assembly 13 can be specifically an end-fire array antenna. The end-fire array antenna has good directivity, and thus can be better applied in a long and narrow space such as a tunnel.

[0091] As shown in FIG. 11, a simplified structure diagram of an end-fire array antenna is shown. In FIG. 11, one end (such as the left end in FIG. 11) of the end-fire array antenna has an interface 130. Please refer to FIG. 9, the interface 130 can be used to dock with one end of the second cable 11b. Alternatively, it can be understood that in the end-fire array antenna provided in the present application, the interface 130 is configured to facilitate the connection convenience and reliability between the end-fire array antenna and the second cable 11b.

[0092] In addition, as shown in FIG. 12, the present application also shows the radiation pattern of the end-fire array antenna. In FIG. 12, the darker the color, the stronger the signal. As can be clearly seen from FIG. 12, the maximum radiation direction of the end-fire array antenna is towards the right. That is, the end-fire array antenna has good directivity, which is conducive to application in long and narrow space environments such as tunnels.

[0093] In addition, in the above examples, the example is exemplarily explained by taking the example of the antenna system 20 including one leaky cable assembly 10. In other examples, the antenna system 20 can also include two or more leaky cable assemblies 10.

[0094] For example, as shown in FIG. 13, in an example provided in the present application, the antenna system 20 includes two leaky cable assemblies, which are leaky cable assembly 10a and leaky cable assembly 10b. Both of the two leaky cable assemblies are fed with power from the power divider 24 in the communication system 21, and the leaky cables in the two leaky cable assemblies extend in opposite directions, thereby effectively improving the coverage range of the wireless signal.

[0095] Specifically, in the leaky cable assembly 10a, the first cable 11a and the second cable 11b can effectively cover the S1a section with signals, and the radiation assembly 13 can effectively cover the S2a section with signals.

[0096] In the leaky cable assembly 10b, the first cable 11a and the second cable 11b can effectively cover the S1b section with signals, and the radiation assembly 13 can effectively cover the S2b section with signals.

[0097] Alternatively, as shown in FIG. 14, in another example provided in the present application, the antenna system 20 can also include four leaky cable assemblies. The four leaky cable assemblies are leaky cable assembly 10a, leaky cable assembly 10b, leaky cable assembly 10c, and leaky cable assembly 10d.

[0098] Specifically, in the leaky cable assembly 10a, the first cable 11a and the second cable 11b can effectively cover the S1a section, and the radiation assembly 13 can effectively cover the S2a section.

[0099] In the leaky cable assembly 10b, the first cable 11a and the second cable 11b can effectively cover the S1b section, and the radiation assembly 13 can effectively cover the S2b section.

[0100] In the leaky cable assembly 10c, the first cable 11a and the second cable 11b can effectively cover the S1c section, and the radiation assembly 13 can effectively cover the S2c section.

[0101] In the leaky cable assembly 10d, the first cable 11a and the second cable 11b can effectively cover the S1d section, and the radiation assembly 13 can effectively cover the S2d section.

[0102] In addition, it should be noted that the two communication systems 21 shown in FIG. 14 can include a radio remote unit 212, a multi-system access platform 213, a second circuit 214, and a power supply 22. Among them, the baseband processing unit 211 can also be deployed at the remote end, and the baseband processing unit 211 can be connected with the radio remote unit 212 in the two communication systems 21 through an optical fiber or other cables with communication signal transmission function.

[0103] It can be understood that the above is only an exemplary description of the case that the antenna system 20 includes four leaky cable assemblies. In other examples, the antenna system 20 can also include more leaky cable assemblies. In specific settings, the number and layout of the leaky cable assemblies can be reasonably set according to actual needs, which will not be repeated here.

[0104] In addition, as shown in FIG. 15, the embodiment of the application also provides a base station, which includes a base station antenna 01 and an antenna system. The base station antenna 01 is connected with the communication system 21 in the antenna system. In the base station provided by the application, the communication system 21 is used to send radio frequency signals to the leaky cable assembly 10 and the base station antenna 01 or receive wireless signals received by the leaky cable assembly 10 and the base station antenna 01. That is, the base station antenna 01 can effectively cover the space outside the tunnel T, and the leaky cable assembly 10 can effectively cover the space inside the tunnel T. By being equipped with the above-mentioned antenna system and the base station antenna 01, the base station can effectively cover the signal of the tunnel T and the external environment, and has good signal receiving performance. Among them, the leaky cable assembly 10 is not limited to the structure type shown in FIG. 15, but can also be any of the above types, which will not be repeated here.

[0105] In various embodiments of the present application, the terms and / or descriptions among different embodiments are consistent and can be referred to each other if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0106] In the present application, "multiple" refers to two or more. "And / or" describes the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural.

[0107] It can be understood that various numbers involved in the embodiments of the present application are only distinguished for the convenience of description, and are not used to limit the scope of the embodiments of the present application. The size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to their functions and inherent logic.

Claims

1. A leaky cable assembly, characterized by The leakage cable and the power amplifier are included; The leakage cable includes a first cable segment and a second cable segment, and the power amplifier is connected between the first cable segment and the second cable segment, and the power amplifier is used for amplifying the signal transmitted between the first cable segment and the second cable segment; The first cable segment includes a first inner conductor, a first insulator and a first outer conductor arranged in sequence from inside to outside, and the first outer conductor has a first radiation slot penetrating through the thickness of the first outer conductor; The second cable segment includes a second inner conductor, a second insulator and a second outer conductor arranged in sequence from inside to outside, and the second outer conductor has a second radiation slot penetrating through the thickness of the second outer conductor; The end of the first cable segment away from the power amplifier is used for connecting with a communication system, and the first inner conductor or the second outer conductor is connected with the power amplifier for power supply.

2. The leaky cable assembly of claim 1, wherein, The power amplifier includes a power amplification circuit and a power supply circuit; The power amplification circuit is respectively connected with the first cable segment and the second cable segment in signal, and one end of the power supply circuit is connected with the first inner conductor or the first outer conductor, and the other end of the power supply circuit is connected with the power amplification circuit for supplying power to the power amplification circuit.

3. The leaky cable assembly of claim 2, wherein, The leakage cable assembly further includes a first circuit, one end of the first circuit is connected with the first cable segment, and the other end of the first circuit is connected with the power amplification circuit and the power supply circuit; The first circuit is used for realizing the signal connection between the first cable segment and the power amplification circuit, and is also used for realizing the power supply connection between the power supply circuit and the first cable segment.

4. The leaky cable assembly of claim 3, wherein, The first circuit is a biasing device.

5. The leaky cable assembly of claim 3 or 4, wherein, The first circuit is integrated in the power amplifier, or the first circuit is independent of the power amplifier.

6. The leaky cable assembly of any one of claims 2 to 5, wherein, The power amplifier includes a first connector and a second connector; When the first circuit is integrated in the power amplifier, the first connector is inserted or welded with the first cable segment, and the second connector is inserted or welded with the second cable segment; When the first circuit is independent of the power amplifier, the first connector is inserted or welded with the first circuit, and the second connector is inserted or welded with the second cable segment.

7. The leaky cable assembly of any one of claims 1 to 6, wherein, The leakage cable assembly further includes a protective sleeve, and the protective sleeve covers the connection between the power amplifier and the first cable segment and the second cable segment.

8. The leaky cable assembly of any one of claims 1 to 7, wherein, The leakage cable assembly further includes a radiation assembly, and the radiation assembly is connected at the end of the second cable segment away from the power amplifier, and the maximum radiation direction of the radiation assembly is away from the power amplifier.

9. The leaky cable assembly of claim 8, wherein, The radiation assembly includes one or more radiation bodies; When the radiation assembly includes a plurality of radiation bodies, the working frequency bands of the plurality of radiation bodies are the same or different.

10. The leaky cable assembly of claim 9, wherein, The radiation assembly includes a plurality of radiation bodies, and the working frequency bands of the plurality of radiation bodies are different. The leakage cable assembly further includes a plurality of filters, and each radiation body is connected with the power amplifier in signal through a corresponding filter.

11. The leaky cable assembly of claim 10, wherein, The power amplifier is used for amplifying the signal in at least one filter.

12. The leaky cable assembly of claim 10 or 11, wherein, The plurality of filters are integrated in the power amplifier, or the plurality of filters are integrated with the radiating assembly, or the plurality of filters are independent of the power amplifier and the radiating assembly.

13. An antenna system, characterized by The antenna system comprises a communication system, a power supply, and at least one leaky cable assembly as claimed in any one of claims 1 to 12, the feed network is connected to the first cable segment at an end away from the power amplifier; The first inner conductor of the first cable segment is connected to the power amplifier and the power supply for power supply, or the first outer conductor of the first cable segment is connected to the power amplifier and the power supply for power supply.

14. The antenna system of claim 13, wherein, The antenna system further comprises a second circuit, one end of the second circuit is connected to the first cable segment, and the other end is connected to the communication system and the power supply; The second circuit is used to realize signal connection between the first cable segment and the communication system, and is also used to realize power supply connection between the power supply and the first cable segment.

15. The antenna system of claim 14, wherein, The second circuit is a biasing device.

16. The antenna system of any one of claims 13 to 15, wherein, The communication system comprises a radio frequency remote unit and a multi-system access platform, the radio frequency remote unit is connected to the first cable segment for feed through the multi-system access platform.

17. The antenna system of claim 16, wherein, The second circuit is integrated with the multi-system access platform, or the second circuit is independent of the multi-system access platform.

18. The antenna system of claim 17, wherein, The communication system further comprises a baseband processing unit, the baseband processing unit is connected to the radio frequency remote unit for signal.

19. A base station, comprising: The antenna system as claimed in any one of claims 13 to 18.

Images