Base station antenna and 5G MIMO frequency shift dual-path dual-antenna system

Abstract

The present invention discloses a base station antenna and a 5G MIMO frequency-shifted dual-path dual-antenna system, which relates to the field of communication technology. The base station antenna includes an active receiving antenna, a transmitting antenna, and a plurality of transceiver separation components, each of which is connected in a one-to-one correspondence with each group of active antenna units in the active receiving antenna; each transceiver separation component is also connected in a one-to-one correspondence with each group of antenna units in the transmitting antenna; during the transmitting time slot, each transceiver separation component receives a downlink signal sent by an RRU and transmits it through a corresponding group of antenna units; during the receiving time slot, each transceiver separation component receives an uplink signal returned by a corresponding group of antenna units and an uplink signal returned by a corresponding group of active antenna units, and after combining the uplink signals, the signals are fed back to the RRU. The present invention can solve the problem of imbalanced uplink and downlink in a high-frequency band mobile communication network system in wide coverage and long-distance coverage.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular to a base station antenna and a 5G MIMO frequency-shifting dual-path dual-antenna system. Background Art

[0002] In order to meet the growing requirements of large-capacity and high-speed data communications in mobile communication networks, mobile communication networks have rapidly developed to the fifth-generation communication system (5G). The fifth-generation mobile communication system frequency mainly operates in the high-frequency band (2.6G / 3.5G). With the widespread application of MIMO technology, mobile communication base station antennas have developed from traditional dual-port to multi-port, and 8-port passive intelligent base station antennas have become the mainstream product for 5G mobile communication network system applications. In the 5G mobile communication wireless network coverage application, it faces an increasingly prominent problem of unbalanced uplink and downlink coverage. The coverage range of the uplink determines the coverage range of the network. As mobile communication networks need to meet the requirements of wide coverage and long-distance coverage applications, a technical solution that can solve the problem of unbalanced uplink and downlink is urgently needed. Summary of the invention

[0003] The technical problem to be solved by the present invention is to address the deficiencies of the prior art and specifically provide a base station antenna and a 5G MIMO frequency-shifted dual-path dual-antenna system, as follows:

[0004] 1) In the first aspect, the present invention provides a beamforming active intelligent base station antenna, and the specific technical solution is as follows:

[0005] It includes an active receiving antenna, a transmitting antenna, and a plurality of transmitting and receiving separation components, each of which is connected to each group of active antenna units in the active receiving antenna in a one-to-one correspondence;

[0006] Each transmit-receive separation component is also connected to each group of antenna units in the transmitting antenna in a one-to-one correspondence;

[0007] During the transmission time slot, each transmit / receive separation component receives the downlink signal sent by the RRU and transmits it through the corresponding group of antenna units;

[0008] During the receiving time slot, each transmit / receive separation component receives the uplink signal returned by the corresponding group of antenna units and the uplink signal returned by the corresponding group of active antenna units, combines them, and then feeds them back to the RRU.

[0009] The beneficial effects of a beamforming active intelligent base station antenna provided by the present invention are as follows:

[0010] During the receiving time slot, both the active receiving antenna and the transmitting antenna upload uplink signals, which can solve the problem of imbalance between uplink and downlink in high-frequency band mobile communication network systems with wide coverage and long-distance coverage.

[0011] Based on the above solution, the beamforming active intelligent base station antenna of the present invention can also be improved as follows.

[0012] Further, each transmit-receive separation component includes: a directional coupler and a first low noise amplifier, and the through end of each directional coupler is connected to a corresponding group of antenna units;

[0013] The coupling end of each directional coupler is connected in sequence to the corresponding first low noise amplifier and the corresponding group of active antenna units;

[0014] During the transmission time slot, each directional coupler receives the downlink signal sent by the RRU and transmits it through the corresponding group of antenna elements;

[0015] During the receiving time slot, each directional coupler receives the uplink signal returned by the corresponding group of antenna units and the uplink signal returned by the corresponding group of active antenna units through the corresponding first low noise amplifier, and after combining them, feeds them back to the RRU.

[0016] The beneficial effect of adopting the above further solution is that it is suitable for application scenarios of high-power and long-range coverage of mobile communications.

[0017] Further, each group of active antenna units includes multiple active antenna units, each active antenna unit includes at least one receiving unit and a second low noise amplifier arranged in a one-to-one correspondence with the receiving unit, and each transmit-receive separation component is connected to each active antenna unit in the corresponding group of active antenna units through a power divider;

[0018] During the receiving time slot, each directional coupler receives the uplink signal returned by the corresponding group of antenna units, and each receiving unit receives the uplink signal returned by each corresponding active antenna unit in turn through the corresponding second low noise amplifier and power divider, and then feeds it back to the RRU after combining.

[0019] The beneficial effects of adopting the above further scheme are:

[0020] The transmitting antenna and the active receiving antenna form spatial diversity. In fact, the uplink beam of the transmitting antenna and the uplink beam of the active receiving antenna form a spatial composite beam. By adjusting the gain of the second low-noise amplifier of the active receiving antenna, the width of the composite beam can be changed and adjusted to achieve gain adjustment of the composite beam, thereby achieving a larger uplink coverage range. The gain of the second low-noise amplifier can be dynamically adjusted according to different application scenarios, which can improve the signal-to-noise ratio of the uplink signal, further expand the uplink coverage range, and achieve long-distance, weak signal uplink coverage, further solving the problem of imbalance between uplink and downlink in high-frequency band mobile communication network systems with wide coverage and long-distance coverage. Furthermore, the power splitter is a five-way power splitter.

[0021] 2) In a second aspect, the present invention further provides a dual antenna system, and the specific technical solution is as follows:

[0022] It includes an RRU and any one of the above beamforming active intelligent base station antennas, and each transmitting and receiving separation component is communicatively connected with the RRU.

[0023] Based on the above solution, a dual antenna system of the present invention can also be improved as follows.

[0024] Furthermore, a calibration network is included, and each transmit-receive separation component is communicatively connected with the RRU via the calibration network.

[0025] 3) In a third aspect, the present invention further provides a 5G MIMO frequency-shifting dual-path dual-antenna system, comprising a 5G MIMO frequency-shifting dual-path system, and the remote device in the 5G MIMO frequency-shifting dual-path system is replaced with any of the above-mentioned dual-antenna systems.

[0026] 4) In a fourth aspect, the present invention further provides a technical solution of a communication method as follows:

[0027] During the transmission time slot, each transmit / receive separation component receives the downlink signal sent by the RRU and transmits it through the corresponding group of antenna elements in the transmit antenna;

[0028] During the receiving time slot, each transmit / receive separation component receives the uplink signal returned by the corresponding group of antenna units in the active receiving antenna and the uplink signal returned by the corresponding group of active antenna units, combines them, and then feeds them back to the RRU;

[0029] Among them, each transmit-receive separation component is connected to each group of active antenna units in the active receiving antenna in a one-to-one correspondence; each transmit-receive separation component is also connected to each group of antenna units in the transmitting antenna in a one-to-one correspondence.

[0030] Based on the above solution, a communication method of the present invention can also be improved as follows.

[0031] Furthermore, each transmit-receive separation component includes: a directional coupler and a first low-noise amplifier, the through end of each directional coupler is connected to a corresponding group of antenna units; the coupling end of each directional coupler is sequentially connected to a corresponding first low-noise amplifier and a corresponding group of active antenna units;

[0032] The process of transmitting a downlink signal includes:

[0033] During the transmission time slot, each directional coupler receives the downlink signal sent by the RRU and transmits it through the corresponding group of antenna elements;

[0034] The process of receiving and combining uplink signals includes:

[0035] During the receiving time slot, each directional coupler receives and combines uplink signals returned from the corresponding group of antenna units and the corresponding group of active antenna units through the corresponding first low noise amplifier.

[0036] Further, each group of active antenna units includes multiple active antenna units, each active antenna unit includes at least one receiving unit and a second low noise amplifier arranged in a one-to-one correspondence with the receiving unit, and each transmit-receive separation component is connected to each active antenna unit in the corresponding group of active antenna units through a power divider;

[0037] The process of receiving and combining uplink signals includes:

[0038] During the receiving time slot, each directional coupler receives the uplink signal returned by the corresponding group of antenna units, and receives the uplink signal returned by each receiving unit of each corresponding active antenna unit through the corresponding second low noise amplifier and power divider in sequence and combines them.

[0039] It should be noted that the beneficial effects achieved by the technical solutions of the second to fourth aspects of the present invention and the corresponding possible implementation methods can be found in the above-mentioned technical effects of the first aspect and its corresponding possible implementation methods, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0041] Figure 1 This is one of the structural schematic diagrams of a beamforming active intelligent base station antenna according to an embodiment of the present invention;

[0042] Figure 2 This is a second structural schematic diagram of a beamforming active intelligent base station antenna according to an embodiment of the present invention;

[0043] Figure 3 It is a schematic diagram of the connection structure between the receiving and transmitting separation components and the active receiving antenna and the transmitting antenna respectively;

[0044] Figure 4 One of the structural diagrams of the dual antenna system;

[0045] Figure 5 This is the second structural diagram of the dual antenna system;

[0046] Figure 6 The figure is a flow chart of a communication method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0048] like Figure 1 As shown, a beamforming active intelligent base station antenna according to an embodiment of the present invention includes an active receiving antenna, a transmitting antenna, and a plurality of transmit-receive separation components, each of which is connected to each group of active antenna units in the active receiving antenna in a one-to-one correspondence;

[0049] Each transmit-receive separation component is also connected to each group of antenna units in the transmitting antenna in a one-to-one correspondence;

[0050] During the transmission time slot, each transmit-receive separation component receives the downlink signal sent by the Remote Radio Unit (RRU) and transmits it through the corresponding group of antenna units.

[0051] During the receiving time slot, each transmit / receive separation component receives the uplink signal returned by the corresponding group of antenna units and the uplink signal returned by the corresponding group of active antenna units, combines them, and then feeds them back to the RRU.

[0052] Optionally, in the above technical solution, if Figure 2 As shown, each transmit-receive separation component includes: a directional coupler and a first low noise amplifier, and the through end of each directional coupler is connected to a corresponding group of antenna units;

[0053] The coupling end of each directional coupler is connected in sequence to a corresponding first low noise amplifier and a corresponding group of active antenna units;

[0054] During the transmission time slot, each directional coupler receives the downlink signal sent by the RRU and transmits it through the corresponding group of antenna units to achieve downlink coverage of the mobile communication network;

[0055] Among them, the coupling degree of the directional coupler is preferably above 20dB, which can ensure that the loss is greatly reduced when the transmission power is transmitted to the transmitting antenna.

[0056] Traditional transmit-receive separation components usually use active electrically controlled RF switches, which have three main problems. First, when the switch is powered off, it presents high RF resistance, which will cause a standing wave alarm in the system. Second, when a distributed RF switch solution is used, the switch is integrated in the LNA unit. When the transmit-receive channel is switched, the switch startup current is too large. The RRU does not support high current power supply and needs to be powered by a -48V dedicated line under the tower, which makes actual installation difficult. Third, the distributed RF switch solution is too expensive and cannot meet the cost reduction requirements of operators. The transmit-receive separation component proposed in the present invention has the advantages of low cost and high reliability, and meets the requirements for separation of transmit / receive RF channels.

[0057] During the receiving time slot, each directional coupler receives the uplink signal returned by the corresponding group of antenna units and the uplink signal returned by the corresponding group of active antenna units through the corresponding first low noise amplifier, and after combining them, feeds them back to the RRU.

[0058] Among them, the gain of the first low noise amplifier can be set in the range of 20 to 25, and the gain is step-adjustable. During the receiving time slot, the directional coupler couples and attenuates the uplink signal received by the active antenna unit to achieve uplink coverage.

[0059] Optionally, in the above technical solution, each group of active antenna units includes multiple active antenna units, each active antenna unit includes at least one receiving unit and a second low-noise amplifier arranged in a one-to-one correspondence with the receiving unit, and each transmit-receive separation component is connected to each active antenna unit in the corresponding group of active antenna units through a power divider;

[0060] Among them, the receiving unit and the antenna unit are both vibrators. During the receiving time slot, each directional coupler receives the uplink signal returned by the corresponding group of antenna units, and each receiving unit of each active antenna unit receives the uplink signal returned by the corresponding second low noise amplifier and power divider in turn, and then feeds it back to the RRU after combining.

[0061] By setting up a second low-noise amplifier, the uplink signal returned to the directional coupler by each receiving unit of each active antenna unit has a better signal-to-noise ratio, effectively expanding the coverage of the uplink. It can be widely used in high-frequency band long-distance wide coverage and deep coverage application scenarios, providing operators with more cost-effective products.

[0062] Optionally, in the above technical solution, the power divider is a five-way power divider or a power divider with other different ways.

[0063] pass Figure 3 The connection relationship between each component is described as follows:

[0064] Figure 3 In the embodiment, the power divider is a five-way power divider, each group of active antenna units includes five active antenna units, each active antenna unit includes four receiving units and four second low-noise amplifiers, five branch ends of the five-way power divider are respectively connected to one active antenna unit, the combining end of the five-way power divider is sequentially connected to the first low-noise amplifier and the coupling end of the directional coupler, each group of antenna units includes five receiving units, each receiving unit includes four antenna units, the through end of the directional coupler is respectively connected to the five receiving units through a phase shifter, and the process of each directional coupler receiving the uplink signal returned by the corresponding group of antenna units is as follows: the directional coupler receives the uplink signal returned by each antenna unit in each antenna unit of the corresponding group of antenna units through the phase shifter. In this embodiment, the five-way power divider adopts a closed cavity structure.

[0065] It should be noted that when the active receiving antenna includes 8 groups of active antenna units, a total of 8 five-way power splitters are required, and when the transmitting antenna includes 8 groups of antenna units, a total of 8 phase shifters are required.

[0066] A dual antenna system according to an embodiment of the present invention comprises an RRU and any one of the beamforming active intelligent base station antennas, wherein each of the transmitting and receiving separation components is communicatively connected to the RRU.

[0067] Optionally, in the above technical solution, a calibration network is also included, and each transceiver separation component is connected to the RRU through the calibration network. Figure 4 shown.

[0068] Optionally, in the above technical solution, if Figure 5 As shown, it also includes a TMC module and a synchronization unit. The TMC module adopts a standard AISG interface and is connected to the AISG interface of the RRU through an AISG cable. It is mainly composed of functional circuits such as AISG network management interface, LAN power supply and monitoring, and OOK communication control. It supports the network management center to query the active antenna LNA status and set the LNA gain. All power supply and communication cables inside the dual-antenna system are RG316 shielded RF cables.

[0069] A 5G MIMO frequency-shifting dual-path dual-antenna system according to an embodiment of the present invention comprises a 5G MIMO frequency-shifting dual-path system, wherein a remote machine in the 5G MIMO frequency-shifting dual-path system is replaced with any of the above-mentioned dual-antenna systems, and a near-end machine in the 5G MIMO frequency-shifting dual-path system is connected to an RRU.

[0070] The 5G MIMO frequency-shifting dual-channel system is a frequency-shifting repeater system. The equipment in the 5G MIMO frequency-shifting dual-channel system includes: at least one near-end machine, at least one far-end machine, and equipment for building a communication link. The equipment used to build a communication link includes: a power divider and a coupler. The working principle of the 5G MIMO frequency-shifting dual-channel system is as follows:

[0071] The near-end machine receives the output signal of the RF base station and couples it, then frequency-shifts the coupled signal, and then uses the RF cable to transmit the frequency-shifted signal to the remote machine. The remote machine frequency-shifts the received signal again, amplifies it, and transmits it, thereby achieving network signal coverage. Each near-end machine can be connected to multiple remote machines, such as each near-end machine is connected to 1 to 64 remote machines, and the number of remote machines connected to each near-end machine can be set according to actual conditions.

[0072] like Figure 6 As shown, a communication method according to an embodiment of the present invention comprises the following steps:

[0073] S1. During the transmission time slot, each transmit / receive separation component receives the downlink signal sent by the RRU and transmits it through the corresponding group of antenna elements in the transmit antenna;

[0074] S2. During the receiving time slot, each transmit / receive separation component receives the uplink signal returned by the corresponding group of antenna units in the active receiving antenna and the uplink signal returned by the corresponding group of active antenna units, combines them, and then feeds them back to the RRU;

[0075] Among them, each transmit-receive separation component is connected to each group of active antenna units in the active receiving antenna in a one-to-one correspondence; each transmit-receive separation component is also connected to each group of antenna units in the transmitting antenna in a one-to-one correspondence.

[0076] Optionally, in the above technical solution, each transmit-receive separation component includes: a directional coupler and a first low-noise amplifier, the through end of each directional coupler is connected to a corresponding group of antenna units; the coupling end of each directional coupler is sequentially connected to a corresponding first low-noise amplifier and a corresponding group of active antenna units;

[0077] The process of transmitting a downlink signal includes:

[0078] During the transmission time slot, each directional coupler receives the downlink signal sent by the RRU and transmits it through the corresponding group of antenna elements;

[0079] The process of receiving and combining uplink signals includes:

[0080] During the receiving time slot, each directional coupler receives and combines uplink signals returned from the corresponding group of antenna units and the corresponding group of active antenna units through the corresponding first low noise amplifier.

[0081] Optionally, in the above technical solution, each group of active antenna units includes multiple active antenna units, each active antenna unit includes at least one receiving unit and a second low-noise amplifier arranged in a one-to-one correspondence with the receiving unit, and each transmit-receive separation component is connected to each active antenna unit in the corresponding group of active antenna units through a power divider;

[0082] The process of receiving and combining uplink signals includes:

[0083] During the receiving time slot, each directional coupler receives the uplink signal returned by the corresponding group of antenna units, and receives the uplink signal returned by each receiving unit of each corresponding active antenna unit through the corresponding second low noise amplifier and power divider in sequence and combines them.

[0084] In the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A beamforming active intelligent base station antenna, characterized in that: It comprises an active receiving antenna, a transmitting antenna, and a plurality of transmitting and receiving separation components, each of which is connected to each group of active antenna units in the active receiving antenna in a one-to-one correspondence; Each transmit-receive separation component is also connected to each group of antenna units in the transmitting antenna in a one-to-one correspondence; During the transmission time slot, each transmit / receive separation component receives the downlink signal sent by the RRU and transmits it through the corresponding group of antenna units; During the receiving time slot, each transmit / receive separation component receives the uplink signal returned by the corresponding group of antenna units and the uplink signal returned by the corresponding group of active antenna units, combines them, and then feeds them back to the RRU; Each transmit-receive separation component comprises: a directional coupler and a first low noise amplifier, and the through end of each directional coupler is connected to a corresponding group of antenna units; The coupling end of each directional coupler is connected in sequence to a corresponding first low noise amplifier and a corresponding group of active antenna units; During the transmission time slot, each directional coupler receives the downlink signal sent by the RRU and transmits it through the corresponding group of antenna elements; During the receiving time slot, each directional coupler receives the uplink signal returned by the corresponding group of antenna units and the uplink signal returned by the corresponding group of active antenna units through the corresponding first low noise amplifier, and after combining them, feeds them back to the RRU.

2. The beamforming active intelligent base station antenna according to claim 1, characterized in that: Each group of active antenna units includes multiple active antenna units, each active antenna unit includes at least one receiving unit and a second low noise amplifier arranged in a one-to-one correspondence with the receiving unit, and each transmit-receive separation component is connected to each active antenna unit in the corresponding group of active antenna units through a power divider; During the receiving time slot, each directional coupler receives the uplink signal returned by the corresponding group of antenna units, and each receiving unit of each corresponding active antenna unit sequentially receives the uplink signal returned by the corresponding second low noise amplifier and power divider, and then feeds it back to the RRU after combining.

3. The beamforming active intelligent base station antenna according to claim 2, characterized in that: The power divider is a five-way power divider.

4. A dual antenna system, characterized in that: It comprises an RRU and a beamforming active intelligent base station antenna as described in any one of claims 1 to 3, and each transmitting and receiving separation component is communicatively connected with the RRU.

5. A dual antenna system according to claim 4, characterized in that: It also includes a calibration network, and each transmit-receive separation component is connected to the RRU through the calibration network.

6. A 5G MIMO frequency-shifted dual-path dual-antenna system, characterized in that: It comprises a 5G MIMO frequency-shifting dual-path system, and the remote end in the 5G MIMO frequency-shifting dual-path system is replaced with a dual-antenna system as described in claim 4 or 5.

7. A communication method, characterized in that: include: During the transmission time slot, each transmit / receive separation component receives the downlink signal sent by the RRU and transmits it through the corresponding group of antenna elements in the transmit antenna; During the receiving time slot, each transmit / receive separation component receives the uplink signal returned by the corresponding group of antenna units in the active receiving antenna and the uplink signal returned by the corresponding group of active antenna units, combines them, and feeds them back to the RRU; Wherein, each transmit-receive separation component is connected to each group of active antenna units in the active receiving antenna in a one-to-one correspondence; each transmit-receive separation component is also connected to each group of antenna units in the transmitting antenna in a one-to-one correspondence; Each transmit-receive separation component comprises: a directional coupler and a first low-noise amplifier, the through end of each directional coupler is connected to a corresponding group of antenna units; the coupling end of each directional coupler is sequentially connected to a corresponding first low-noise amplifier and a corresponding group of active antenna units; The process of transmitting a downlink signal includes: During the transmission time slot, each directional coupler receives the downlink signal sent by the RRU and transmits it through the corresponding group of antenna elements; The process of receiving and combining uplink signals includes: During the receiving time slot, each directional coupler receives and combines uplink signals returned from the corresponding group of antenna units and the corresponding group of active antenna units through the corresponding first low noise amplifier.

8. A communication method according to claim 7, characterized in that: Each group of active antenna units includes multiple active antenna units, each active antenna unit includes at least one receiving unit and a second low noise amplifier arranged in a one-to-one correspondence with the receiving unit, and each transmit-receive separation component is connected to each active antenna unit in the corresponding group of active antenna units through a power divider; The process of receiving and combining uplink signals includes: During the receiving time slot, each directional coupler receives the uplink signal returned by the corresponding group of antenna units, and receives the uplink signal returned by each receiving unit of each corresponding active antenna unit through the corresponding second low noise amplifier and power divider in sequence and combines them.

Images