Antenna device and base station

Abstract

The present application provides an antenna device and a base station. The antenna device is provided with two array surfaces (i.e., a first array surface and a second array surface); the two array surfaces are arranged in an up-down structure in the vertical dimension; and the downtilt of the upper first array surface is smaller than 0 and larger than -90 degrees, and the downtilt of the lower second array surface is larger than 0 and smaller than 90 degrees. Due to the special structures of the two antenna array surfaces, a first signal radiated by the first array surface can realize air coverage, and a second signal radiated by the second array surface can realize ground coverage, so that the antenna device provided by the present application has the two signal coverage functions of air coverage and ground coverage, which is conducive to providing signal coverage for a ground communication terminal and an airspace communication terminal at the same time by means of a same antenna device, thereby improving the communication efficiency.

Description

An antenna device and a base station

[0001] The present application claims priority to the Chinese patent application No. 202410659726.X, filed on May 24, 2024, and entitled "An antenna device and a base station", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the field of communication, in particular to an antenna device and a base station. BACKGROUND

[0003] In recent years, the development of low-altitude economy has driven the demand for low-altitude security management of aircraft such as unmanned aerial vehicles. Generally, the low-altitude security management of aircraft such as unmanned aerial vehicles involves identity management and flight trajectory management of the aircraft, and the management process needs to communicate with the aircraft such as unmanned aerial vehicles. In this scenario, the unmanned aerial vehicle can be regarded as a space communication terminal. The space communication terminal needs to access the base station to obtain communication services.

[0004] However, since the height of the antenna of the conventional base station is generally higher than the use height of the ground communication terminal (such as a mobile phone, a computer, a vehicle, etc.), the signal coverage of the conventional ground base station is "downward inclined", that is, the axis of the main lobe radiated by the base station antenna in the vertical dimension is downward inclined at an acute angle with the horizontal dimension axis. The flight height of the space communication terminal is often higher than the signal coverage range of the ground base station, so the signal coverage of the conventional ground base station may not meet the communication needs of the aircraft and other space communication terminals.

[0005] Currently, how to realize the signal coverage of the space communication terminal has become a hot topic of discussion. SUMMARY

[0006] The present application provides an antenna device and a base station for realizing ground signal coverage and space signal coverage at the same time, improving communication efficiency.

[0007] In a first aspect, the present application provides an antenna device applied in a base station. The antenna device comprises a first array surface and a second array surface, the first array surface and the second array surface are arranged in an up-down structure in the vertical dimension, the downward inclination angle of the first array surface located at the upper side is less than 0 and greater than -90°, and the downward inclination angle of the second array surface located at the lower side is greater than 0 and less than 90°; wherein the first array surface is used for radiating a first signal, and the first signal is used for space communication; the second array surface is used for radiating a second signal, and the second signal is used for ground communication.

[0008] In the present application, the antenna device has two array surfaces (i.e., a first array surface and a second array surface), which are arranged in an up-down structure in the vertical dimension. The first array surface located at the top has a downward tilt angle less than 0 and greater than -90°, and the second array surface located at the bottom has a downward tilt angle greater than 0 and less than 90°. Due to the special structure of the two aforementioned antenna array surfaces, the first signal radiated by the first array surface can achieve space coverage, and the second signal radiated by the second array surface can achieve ground coverage. Therefore, the antenna device provided in the present application has both space coverage and ground coverage functions, which is conducive to providing signal coverage to both ground communication terminals and space communication terminals through the same antenna device, thereby improving communication efficiency.

[0009] In a possible implementation, the first signal and the second signal use the same time-frequency resource. It can be understood that the first array surface and the second array surface respectively radiate the first signal and the second signal at the same time. The antenna device can achieve space coverage and ground coverage at the same time, i.e., providing signal coverage service to both ground communication terminals and space communication terminals through the same antenna device, which is conducive to improving communication efficiency.

[0010] In a possible implementation, the first array surface includes at least one first antenna port, which is an antenna port of the first array surface in the vertical dimension, and at least two first antenna units, which are antenna units of the first array surface in the vertical dimension; the second array surface includes at least one second antenna port, which is an antenna port of the second array surface in the vertical dimension, and at least two second antenna units, which are antenna units of the second array surface in the vertical dimension; the number of first antenna units corresponding to one first antenna port is less than the number of second antenna units corresponding to one second antenna port.

[0011] In the present embodiment, the more the number of antenna units (e.g., dipoles) connected to one antenna port, the narrower the signal (i.e., beam) radiated. Therefore, the design of the aforementioned antenna port and antenna dipole can make the first signal radiated by the first array surface a wide beam with a large angle, achieving wider space coverage, and make the second signal radiated by the second array surface a narrow beam with a small angle, achieving more accurate ground coverage.

[0012] In a possible implementation, the antenna device further includes a first driving module; the first driving module is configured to connect the first antenna port of the first array surface and the second antenna port of the second array surface to the radio frequency port of the first radio frequency unit, and the first radio frequency unit is configured to transmit a radio frequency signal to the first antenna port of the first array surface and the second antenna port of the second array surface through the first driving module.

[0013] In the embodiment, the antenna device is additionally provided with the first driving module 04, so that the radio frequency unit of the base station can be adapted to the antenna ports of the antenna array when the radio frequency unit of the base station is not matched with the antenna ports of the antenna array, and the adaptability of the antenna device is improved.

[0014] In a possible implementation, the first radio frequency unit includes A radio frequency ports, the antenna device includes B antenna ports, A is an integer greater than 0, B is an integer greater than 1, and A is less than B; and the first driving module is configured to convert signals of the A radio frequency ports to the B antenna ports, and the B antenna ports include at least one first antenna port of the first array and at least one second antenna port of the second array.

[0015] In a possible implementation, the antenna device further includes at least one first filter, and the at least one first filter corresponds to the at least one first antenna unit in one-to-one manner; the first filter is configured to perform filtering processing on signals transmitted by the first antenna unit, the filtering bandwidth of the first filter is equal to the bandwidth of the first signal, and a guard bandwidth is arranged between the frequency range of the filtering bandwidth and the interference frequency range. The interference frequency range can be a frequency range of satellite communication, a frequency range of radar, or a frequency range of other aircraft.

[0016] In the embodiment, the first filter is arranged to filter the signals transmitted by the first antenna unit, so that the frequency range of the space-to-air beam (i.e., the first signal) is separated from the interference frequency range. That is, the guard bandwidth is arranged between the frequency range of the first signal and the interference frequency range (for example, the frequency range of satellite communication), which is beneficial to avoid the interference of the space-to-air communication on satellite communication and ensure the coexistence of the space-to-air communication and the adjacent frequency satellite system.

[0017] In a possible implementation, the center frequency point of the bandwidth of the first signal is the same as the center frequency point of the bandwidth of the second signal, so that the first array and the second array can share the same radio frequency unit.

[0018] In a second aspect, the application provides an antenna device, which is configured as the antenna device in any one of the embodiments of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0019] FIG. 1 is an example diagram of an application scenario of the antenna device provided by the application;

[0020] FIG. 2 is a schematic diagram of an embodiment of the antenna device provided by the application;

[0021] FIG. 3 is a schematic diagram of another embodiment of the antenna device provided by the application;

[0022] FIG. 4A is an example diagram of the bandwidth of the first signal radiated by the antenna device provided by the application;

[0023] FIG. 4B is another example diagram of a bandwidth of a first signal radiated by an antenna device provided in the present application;

[0024] FIG. 5 is a schematic diagram of another embodiment of an antenna device provided in the present application;

[0025] FIG. 6 is a schematic diagram of another embodiment of an antenna device provided in the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application.

[0027] The terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the terms thus used can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] It should be understood that the term "and / or" herein is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, B exists alone, where A and B can be single or multiple. In addition, the character " / " herein generally represents an "or" relationship between the associated objects. In addition, "at least one of the following" or similar expressions herein are used to represent any combination of the listed items; for example, at least one of A, B and (or) C can represent the following six cases: A exists alone, B exists alone, C exists alone, A and B exist together, B and C exist together, A and C exist together, A, B and C exist together, where A, B and C can be single or multiple.

[0029] The antenna device provided in the application can be applied to a scenario in any communication system that has a demand for providing signal coverage for space communication devices and ground communication devices. For example, the communication system can be a long term evolution (LTE) system, a 5th generation mobile communication technology (5G) system, a 6th generation mobile communication technology (6G) system, and other communication systems, and the application is not limited thereto.

[0030] As shown in FIG. 1, the communication system in the scenario at least includes a terminal device and an access network device.

[0031] The terminal device includes a device that provides voice and / or data connectivity to a user. For example, it can include a handheld device with a wireless connection function or a processing device connected to a wireless modem. The terminal device can communicate with a core network (for example, a 5th generation core (5GC)) through a radio access network (RAN), and can exchange voice and / or data with the RAN. The terminal device can also be referred to as a terminal, a user equipment (UE), a wireless terminal device, a mobile terminal (MT) device, a subscriber unit, a subscriber station, a user terminal device, a user agent, or a user device, etc. The terminal device can be divided into space communication terminals and ground communication terminals according to the altitude of the working height. The space communication terminal includes a drone, an aircraft, etc. with communication function. The ground communication terminal includes a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, and a vehicle-mounted wireless terminal, etc. It should be understood that the terminal device in the embodiments of the application can be any one of the above devices or a chip in the above devices, and in the embodiments and subsequent embodiments, the terminal device is taken as an example for introduction.

[0032] The access network device can be any device with wireless transceiver function. For example, the access network device can transceive wireless signals through an antenna device. The access network device includes a remote radio unit (RU) module for processing intermediate frequency signals or radio frequency signals, and is capable of transmitting or receiving radio frequency signals. The RU module can be configured independently of the antenna device (e.g., an antenna line device (ALD), also known as an antenna linear device). For example, in a 5G NR system, the aforementioned RU module can be a remote radio unit (RRU) (or a remote radio head (RRH)). In addition, the access network device can also be configured with a baseband unit (BBU) with baseband signal processing function. For example, the access network device can be a radio access network (RAN) (i.e., a ground base station) currently serving terminal devices (e.g., space communication terminals or ground communication terminals). Currently, some common examples of access network devices are: Node B (NB), evolved Node B (eNB), next generation Node B (gNB) in a 5G new radio (NR) system, nodes (e.g., xNodeB) in a 6G system, transmission reception point (TRP), radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB or home Node B (HNB)), etc. In addition, in a cloud radio access network (CloudRAN) or open radio access network (ORAN) network structure, the access network device can be a device including a centralized unit (CU) (also known as a control unit) and / or a distributed unit (DU). The RAN device including the CU and the DU splits the protocol layers of the gNB in the NR system, and the functions of part of the protocol layers are placed in the CU for centralized control, and the functions of the remaining part or all of the protocol layers are distributed in the DU, which is controlled by the CU.A plurality of DUs can share one CU. The splitting of the CU and the DU can be according to a protocol stack, which is not limited in the application. It should be understood that the access network device in the embodiments of the application can be any one of the above devices or a chip in the above devices, and in the embodiments and subsequent embodiments, the access network device is taken as an example for introduction.

[0033] Optionally, the communication system can also include a relay device (also referred to as a relay node (RN)), which is generally deployed in an area with poor signal coverage, for expanding or improving network coverage. The relay device includes an RU module capable of transmitting or receiving radio frequency signals. The RU module can be configured independently of an antenna device (for example, an antenna line device (ALD) (also referred to as an antenna linear device). For example, in a 5G NR system, the aforementioned RU module can be a remote radio unit (RRU) (or a remote radio head (RRH)).

[0034] The antenna device provided by the application can be applied to the aforementioned access network device (for example, a ground base station) or a relay device, for realizing spatial signal coverage while realizing ground signal coverage, and improving communication efficiency.

[0035] FIG. 2 is an example diagram of the main structure of the antenna device provided by the application.

[0036] As shown in FIG. 2, the antenna device provided by the application mainly includes a first array surface 01 and a second array surface 02. Both the first array surface 01 and the second array surface 02 are antenna arrays including a plurality of antenna units. The first array surface 01 and the second array surface 02 are arranged in an up-down structure in the vertical dimension, i.e., the first array surface 01 is located above the second array surface 02 and the second array surface 02 is located below the first array surface 01 in the vertical plane (i.e., the vertical plane). The first array surface 01 is used to radiate a first signal, and the second array surface 02 is used to radiate a second signal.

[0037] The downward tilt angle of the first array surface 01 located above and the downward tilt angle of the second array surface 02 located below are different. The downward tilt angle refers to the angle between the radiation direction of the antenna signal and the horizontal direction. Generally, the antenna signal includes a major lobe and a plurality of side lobes (side lobes), and the radiation direction of the antenna signal refers to the radiation direction of the major lobe. In some scenarios, the downward tilt angle is also referred to as the pitch angle. For example, the angle between the horizontal dimension axis along the clockwise direction and the radiation direction of the antenna signal is the pitch angle, i.e., the value of the downward tilt angle is positive; the angle between the horizontal dimension axis along the counterclockwise direction and the radiation direction of the antenna signal is the elevation angle, i.e., the value of the downward tilt angle is negative.

[0038] As shown in FIG. 2, in the antenna device provided by the application, the downward tilt angle (referred to as the first downward tilt angle) of the first array surface 01 located above is less than 0° and greater than -90°, that is, the included angle between the horizontal dimension axis and the radiation direction of the first signal (that is, the signal radiated by the first array surface 01) is an acute angle along the counterclockwise direction, and it can also be understood that the elevation angle of the first array surface 01 is greater than 0° and less than 90°. The downward tilt angle (referred to as the second downward tilt angle) of the second array surface 02 located below is greater than 0° and less than 90°, that is, the included angle between the horizontal dimension axis and the radiation direction of the second signal (that is, the signal radiated by the second array surface 01) is an acute angle along the clockwise direction, and it can also be understood that the depression angle of the first array surface 01 is greater than 0° and less than 90°.

[0039] The positional relationship between the aforementioned first array surface 01 and the second array surface 02 can also be understood as that the axis of the first array surface 01 forms an acute angle with the vertical dimension axis, the axis of the second array surface 02 located below forms an acute angle with the vertical dimension axis, the axis of the first array surface 01 forms an obtuse angle with the axis of the second array surface 02 in the vertical dimension, and the first array surface 01 and the second array surface 02 are located on the same side of the vertical dimension axis. For example, as shown in FIG. 2, the included angle b between the axis of the first array surface 01 and the axis of the second array surface 02 is an obtuse angle, the included angle b between the axis of the first array surface 01 and the vertical dimension axis is an acute angle, the included angle c between the axis of the second array surface 02 and the vertical dimension axis is an acute angle, and a+b+c=180°. It should be understood that the axis of the first array surface 01 refers to the axis of the first array surface 01 in the vertical dimension, that is, the axis of the first array surface 01 in the vertical plane; and the axis of the second array surface 02 refers to the axis of the second array surface 02 in the vertical dimension, that is, the axis of the second array surface 02 in the vertical plane.

[0040] In the structure shown in FIG. 2, the first array surface 01 is used to radiate the first signal, and the radiation direction of the first signal points to the airspace, which is used to realize airspace coverage; and the second array surface 02 is used to radiate the second signal, and the radiation direction of the second signal points to the ground, which is used to realize ground coverage. Due to the special structure of the aforementioned two array surfaces, the first signal radiated by the first array 01 can realize airspace coverage, and the second signal radiated by the second array surface 02 can realize ground coverage, so that the antenna device realizes air coverage and ground coverage.

[0041] Optionally, the first signal radiated by the first array surface 01 and the second signal radiated by the second array surface 02 use the same time-frequency resource, that is, the signals of the two array surfaces are emitted at the same time. The antenna device can realize air coverage and ground coverage at the same time, that is, the same antenna device is used to provide signal coverage services for ground communication terminals and airspace communication terminals at the same time, which is beneficial to improve communication efficiency.

[0042] In addition, the first array surface 01 and the second array surface 02 can realize the relative fixation between the first array surface 01 and the second array surface 02 in any of the following manners:

[0043] In a possible implementation, one end of the first array surface 01 is connected with one end of the second array surface 02. In an example, the lower end of the first array surface 01 (i.e., the end of the first array surface 01 close to the second array surface 02) is connected with the upper end of the second array surface 02 (i.e., the end of the second array surface 02 close to the first array surface 01) through a movable component (for example, a hinge connection), so as to facilitate adjustment of the included angle (for example, the included angle a) between the axis of the first array surface 01 and the axis of the second array surface 02, thereby facilitating adjustment of the radiation direction of the first signal and the radiation direction of the second signal. In another example, the lower end of the first array surface 01 (i.e., the end of the first array surface 01 close to the second array surface 02) is connected with the upper end of the second array surface 02 (i.e., the end of the second array surface 02 close to the first array surface 01) in a fixed manner (for example, a welding point connection), so as to facilitate fixation of the included angle of the two array surfaces and improve the stability of the antenna array.

[0044] In another possible implementation, the first array surface 01 and the second array surface 02 can be fixed in the radome at a certain angle, so that the first array surface 01 and the second array surface 02 form an angular arrangement as shown in FIG. 2. In this case, one end of the first array surface 01 can be not connected with one end of the second array surface 02, or the included angle between the two array surfaces can be fixed to improve the stability of the antenna array.

[0045] In addition, the first array surface 01 and the second array surface 02 are both antenna arrays including a plurality of antenna units. One antenna unit can be one physical radiation unit, for example, one antenna unit is one dipole or one patch element. One antenna unit can also be a logical antenna unit composed of a group of dipoles, for example, 2 dipoles, 3 dipoles or 6 dipoles are grouped as one logical antenna unit.

[0046] The first array surface 01 includes at least two first antenna units 011 in the vertical dimension, and the second array surface 02 includes at least two second antenna units 021 in the vertical dimension. The first antenna unit 011 can be the aforementioned physical radiation unit or the aforementioned logical antenna unit, and the second antenna unit 021 can be the aforementioned physical radiation unit or the aforementioned logical antenna unit, which is not limited in the present application.

[0047] Optionally, the number of the first antenna units 011 is less than the number of the second antenna units 021, that is, the first array surface 01 is arranged with a smaller number of the first antenna units 011 in the vertical dimension, and the second array surface 02 is arranged with a larger number of the second antenna units 021 in the vertical dimension. For example, in the example shown in FIG. 2, the first array surface 01 is arranged with 3 first antenna units 011 in the vertical dimension, and the second array surface 02 is arranged with 5 second antenna units 021 in the vertical dimension. Of course, it can also be arranged that the first array surface 01 contains 4 first antenna units 011 in the vertical dimension, and the second array surface 02 contains 5 second antenna units 021 in the vertical dimension. In actual applications, the number of the first antenna units 011 and the number of the second antenna units 021 can also be arranged in other proportions, which will not be listed one by one here.

[0048] Generally, if the distribution intervals of the antenna units in the array surfaces are uniform, the more the number of the antenna units, the narrower the beam radiated by the array surface, and the more concentrated the energy radiation; on the contrary, the less the number of the antenna units, the wider the beam radiated by the array surface, and the more extensive the energy radiation. Therefore, when the distribution intervals of the first antenna units 011 in the first array surface 01 in the vertical dimension are equal to the distribution intervals of the second antenna units 021 in the second array surface 02 in the vertical dimension, if the number of the first antenna units 011 is less than the number of the second antenna units 021, the first signal radiated by the first array surface 01 can achieve a wider spatial coverage, and the second signal radiated by the second array surface 02 can achieve a more accurate ground coverage. This is conducive to the antenna device to provide radiation signals that meet the spatial coverage demand and the ground coverage demand respectively while achieving spatial coverage and ground coverage, and is conducive to improving communication efficiency.

[0049] Optionally, as shown in FIG. 3, the first array surface 01 includes, in addition to the first antenna elements 011, first antenna ports 012 corresponding to the first antenna elements 011, the first antenna ports 012 being antenna ports of the first array surface 01 in the vertical dimension. The second array surface 02 includes, in addition to the second antenna elements 021, second antenna ports 022 corresponding to the second antenna elements 021, the second antenna ports 022 being antenna ports of the second array surface 02 in the vertical dimension. The first antenna elements 011 include at least one first antenna element, the first antenna element being an antenna element of the first array surface 01 in the vertical dimension; the second antenna elements 021 include at least one second antenna element, the second antenna element being an antenna element of the second array surface 02 in the vertical dimension. The number of first antenna elements corresponding to one first antenna port 012 is less than the number of second antenna elements corresponding to one second antenna port 022. Since the more antenna elements connected to one antenna port, the narrower the signal (i.e. beam) radiated, the design of the aforementioned antenna ports and antenna elements can make the first signal radiated by the first array surface 01 a wide beam with a large angle, realizing a wider spatial coverage, while making the second signal radiated by the second array surface 02 a narrow beam with a small angle, realizing a more accurate ground coverage.

[0050] Different implementations of the antenna elements are listed below:

[0051] In one implementation, the first antenna elements 011 and the second antenna elements 021 are dual-polarized elements, i.e. one first antenna element 011 includes two antenna elements with different polarizations, and one second antenna element 021 includes two antenna elements with different polarizations. The two antenna elements with different polarizations can be a vertically polarized antenna element and a horizontally polarized antenna element, or a +45° polarized antenna element and a -45° polarized antenna element. In this case, the first array surface 01 includes at least two first antenna elements, and the second array surface 02 includes at least two second antenna elements. Since the number of first antenna elements 011 included in the first array surface 01 is less than the number of second antenna elements 021 included in the second array surface 02, the number of first antenna elements included in the first array surface 01 is less than the number of second antenna elements included in the second array surface 02. Since the antenna elements with the same polarization direction in the same array surface are connected to the same antenna port, and the antenna elements with different polarization directions in the same array surface are connected to different antenna ports, the number of first antenna elements corresponding to one first antenna port 012 is less than the number of second antenna elements corresponding to one second antenna port 022.

[0052] For example, as shown in FIG. 3, the first array surface 01 includes 2 first antenna units 011, each of which includes a first antenna element of -45° polarization (e.g., first antenna element #1) and a first antenna element of +45° polarization (e.g., first antenna element #2). Among them, 2 first antenna elements of -45° polarization are connected with antenna port #1, and 2 first antenna elements of +45° polarization are connected with antenna port #2. The second array surface 02 includes 4 second antenna units 021, each of which includes a second antenna element of -45° polarization (e.g., second antenna element #1) and a second antenna element of +45° polarization (e.g., second antenna element #2). Among them, 4 second antenna elements of -45° polarization are connected with antenna port #3, and 4 second antenna elements of +45° polarization are connected with antenna port #4. As can be seen, antenna port #1 (or antenna port #2) corresponds to 2 first antenna elements, and antenna port #3 (or antenna port #4) corresponds to 4 second antenna elements, that is, the number of first antenna elements corresponding to the first antenna port 012 is less than the number of second antenna elements corresponding to the second antenna port 022.

[0053] In another implementation, one antenna unit is one single-polarized element. For example, one antenna unit is one vertical-polarized element; or one antenna unit is one horizontal-polarized element; or one antenna unit is one +45° polarized element; or one antenna unit is one -45° polarized element. In this case, the first array surface 01 includes at least one first antenna element, and the second array surface 02 includes at least one second antenna element. Since the number of first antenna units 011 included in the first array surface 01 is less than the number of second antenna units 021 included in the second array surface 02, the number of first antenna elements included in the first array surface 01 is less than the number of second antenna elements included in the second array surface 02. For example, if the 2 first antenna units 011 included in the first array surface 01 are respectively 2 vertical-polarized elements, then the 2 vertical-polarized elements are connected with one first antenna port 012. If the 4 second antenna units 021 included in the second array surface 02 are respectively 4 horizontal-polarized elements, then the 4 horizontal-polarized elements are connected with one second antenna port 022. As can be seen, the number of first antenna elements corresponding to the first antenna port 012 is less than the number of second antenna elements corresponding to the second antenna port 022.

[0054] In addition, the antenna device provided in the present application has certain requirements on signal frequency.

[0055] In a possible implementation, as shown in FIG. 4A, a guard bandwidth is arranged between the frequency range of the first signal and the interference frequency range. The interference frequency range can be a frequency range of satellite communication, a frequency range of radar communication, a frequency range of other aircraft, etc., and the application does not limit it. In an example, the interference frequency range can be on only one side of the frequency range of the first signal. For example, the frequency of the interference frequency range 1 shown in FIG. 4A is greater than the frequency of the frequency range of the first signal, or the frequency of the interference frequency range 2 shown in FIG. 4A is less than the frequency of the frequency range of the first signal. In another example, the interference frequency range can be on both sides of the frequency range of the first signal. For example, there are interference frequency ranges 1 and 2 on both sides of the frequency range of the first signal.

[0056] In the embodiment, the guard bandwidth is arranged between the frequency range of the first signal and the interference frequency range, which is beneficial to avoid interference of the space-to-air communication on other communication frequency bands (for example, adjacent frequency satellite communication or radar communication), and ensure coexistence of the space-to-air communication and other communication systems (for example, adjacent frequency satellite system or radar communication system).

[0057] In a possible implementation, as shown in FIG. 4B, the center frequency point of the bandwidth of the first signal is the same as the center frequency point of the bandwidth of the second signal, which facilitates the first array surface 01 and the second array surface 02 to share the same radio frequency unit.

[0058] In a possible implementation, as shown in FIG. 5, the antenna device provided by the application further includes a first filter 03, which is used for filtering the signal transmitted by the first antenna unit 011, and the filtering bandwidth of the first filter 03 is equal to the bandwidth of the first signal. For example, the first array surface 01 includes N first antenna units 011, and the antenna device includes N first filters 03, the N first antenna units 011 correspond to the N first filters 03 one by one, and the filtering bandwidth of the first filter 03 is equal to the bandwidth of the first signal, where N is an integer greater than 0.

[0059] In the embodiment, the antenna device is provided with the first filter 03 for the first antenna unit 011, which can filter out the interference of other signals on the first signal. Since the second antenna unit 021 is not provided with a filter, the interference suppression can be realized through the first filter without affecting the system bandwidth of the ground communication, which is beneficial to improve the space-to-air communication anti-interference performance of the antenna device.

[0060] In a possible implementation, as shown in FIG. 6, the antenna device further includes a first driving module 04, which is configured to connect the first array surface 01 and the second array surface 02 with a first radio frequency unit, and the first radio frequency unit is configured to transmit radio frequency signals to the first array surface 01 and the second array surface 02 through the first driving module 04. For example, the first radio frequency unit is a radio frequency unit of a conventional base station, and the two antenna arrays provided in the application cannot be directly connected with the conventional first radio frequency unit. In this regard, the antenna device provided in the application is configured with the first driving module 04, which is configured to adapt the radio frequency ports of the first radio frequency unit and the antenna ports of the two array surfaces of the antenna device. For example, the first radio frequency unit includes A radio frequency ports, and the antenna device includes B antenna ports, A is an integer greater than 0, and B is an integer greater than 1. The first driving module 04 is configured to convert the signals of the A radio frequency ports to the B antenna ports, and the B antenna ports include the plurality of antenna ports of the first array surface 01 and the plurality of antenna ports of the second array surface 02. Optionally, the conversion coefficient of the first driving module 04 is related to the amplitude coefficient and / or the phase coefficient of the antenna unit.

[0061] Since the antenna device is additionally provided with the first driving module 04, when the radio frequency unit of the conventional base station does not match the antenna ports of the antenna array, the first driving module 04 can realize the adaptation of the radio frequency unit of the base station and the antenna ports of the antenna array, thereby improving the adaptability of the antenna device.

[0062] In addition, the application further provides a base station, which is configured with the antenna device described in the foregoing FIG. 2, FIG. 5 or FIG. 6. The structure of the base station can be referred to the description of the access network device in the foregoing FIG. 1, and will not be described herein.

[0063] It should be understood that, in various embodiments of the application, the size of the sequence number of each process described above does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the application.

[0064] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be described herein.

Claims

1. An antenna device, characterized by Comprising: a first array and a second array, the first array and the second array are arranged in an up-down structure in a vertical dimension, the downward tilt angle of the first array located at the top is less than 0 and greater than -90°, and the downward tilt angle of the second array located at the bottom is greater than 0 and less than 90°; the first array is configured to radiate a first signal, the first signal is configured for space communication; the second array is configured to radiate a second signal, the second signal is configured for ground communication.

2. The antenna device of claim 1, wherein, The first signal and the second signal use the same time-frequency resource.

3. The antenna device of claim 2, wherein, The first array includes at least one first antenna port, the first antenna port is an antenna port of the first array in the vertical dimension, and the first array includes at least two first antenna units, the first antenna unit is an antenna unit of the first array in the vertical dimension; the second array includes at least one second antenna port, the second antenna port is an antenna port of the second array in the vertical dimension, and the second array includes at least two second antenna units, the second antenna unit is an antenna unit of the second array in the vertical dimension; the number of first antenna units corresponding to one first antenna port is less than the number of second antenna units corresponding to one second antenna port.

4. The antenna device of claim 3, wherein, The antenna device further comprises a first driving module; The first driving module is configured to connect the first antenna port of the first array and the second antenna port of the second array with the radio frequency port of the first radio frequency unit, and the first radio frequency unit is configured to transmit a radio frequency signal to the first antenna port of the first array and the second antenna port of the second array through the first driving module.

5. The antenna device of claim 4, wherein, The first radio frequency unit includes A radio frequency ports, the antenna device includes B antenna ports, A is an integer greater than 0, B is an integer greater than 1, and A is less than B; The first driving module is configured to convert the signals of the A radio frequency ports to the B antenna ports, and the B antenna ports include at least one first antenna port of the first array and at least one second antenna port of the second array.

6. The antenna device according to any one of claims 1 to 5, characterized in that The antenna device further comprises at least one first filter, and the at least one first filter corresponds to at least one first antenna unit one-to-one; The first filter is configured to filter the signal transmitted by the first antenna unit, the filter bandwidth of the first filter is equal to the bandwidth of the first signal, and a guard bandwidth is arranged between the frequency range of the filter bandwidth and the interference frequency range.

7. The antenna device according to any one of claims 1 to 6, characterized in that, The center frequency point of the bandwidth of the first signal is the same as the center frequency point of the bandwidth of the second signal.

8. A base station, characterized by Comprising: The antenna device according to any one of claims 1 to 7.

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