CN117199777A

CN117199777A - Antenna array, antenna and network device

Info

Publication number: CN117199777A
Application number: CN202210605269.7A
Authority: CN
Inventors: 蔡丹涛; 段文; 邓良勇; 肖伟宏; 金锐
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2023-12-08
Also published as: WO2023231751A1

Abstract

The disclosure provides an antenna array, an antenna and network equipment, and belongs to the technical field of communication. The antenna array includes a first resonant circuit, a second resonant circuit, a third resonant circuit, a first antenna element, and a second antenna element. The first resonant circuit is provided with a first open end and a second open end, the second resonant circuit is coupled with the first open end and is electrically connected with the first antenna unit, and the third resonant circuit is coupled with the second open end and is electrically connected with the second antenna unit. In the antenna array provided by the disclosure, the first resonant circuit, the second resonant circuit and the third resonant circuit integrate the filtering function and the power dividing function together, so that the filtering effect on the feed signal is realized, the power dividing effect is also realized, the loss of the feed signal is reduced, and the space occupied by the power divider and the filter is reduced.

Description

Antenna array, antenna and network device

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to an antenna array, an antenna, and a network device.

Background

The antenna generally includes a reflecting plate and an antenna array positioned on the reflecting plate.

The antenna array comprises a feed network and a plurality of antenna units, and the feed network is respectively and electrically connected with the feed source and the plurality of antenna units.

For a feed network, how to realize power division and filtering of a feed signal on the premise of ensuring that the performance index of an antenna meets the use requirement is a key technical problem.

Disclosure of Invention

The present disclosure provides an antenna array, an antenna and a network device, wherein a first open end and a second open end of a first resonant circuit in the antenna array are respectively coupled with a second resonant circuit and a third resonant circuit, so that the first resonant circuit, the second resonant circuit and the third resonant circuit integrate a filtering function and a power dividing function, thereby realizing a filtering function on a feed signal, realizing a power dividing function, reducing a space occupied by a power dividing device and a filtering device, and reducing a loss of the feed signal. The following describes the technical scheme provided in the present disclosure:

in a first aspect, the present disclosure provides an antenna array comprising a first resonant circuit, a second resonant circuit, a third resonant circuit, a first antenna element, and a second antenna element. The first resonant circuit has a first open end and a second open end. The second resonant circuit is coupled with the first open end and is electrically connected with the first antenna unit, and the third resonant circuit is coupled with the second open end and is electrically connected with the second antenna unit.

Wherein the first, second and third resonant circuits comprise resonators. The number of resonators included in the first resonant circuit, the second resonant circuit, and the third resonant circuit is not limited in this disclosure, and the first resonant circuit, the second resonant circuit, and the third resonant circuit may include one resonator or may include a plurality of resonators coupled together.

The types of resonators included in the first resonant circuit, the second resonant circuit and the third resonant circuit are not limited in the disclosure, and the resonators included in the first resonant circuit, the second resonant circuit and the third resonant circuit may be single-mode resonators or multimode resonators. In one possible implementation, the first, second and third resonant circuits include resonators, and the resonators appearing hereinafter may all be transmission line resonators.

Open ends, e.g. a first open end, a second open end and the open ends appearing hereinafter, refer to a region of the resonator comprising an end. In one possible implementation, when the resonator is a half-wavelength resonator, the region may be defined as the region of one end of the resonator toward the resonator center point λ/8. Wherein λ refers to a wavelength corresponding to a center frequency of the resonator, the center frequency refers to an intermediate value of a sum of a lowest frequency and a highest frequency of an operating frequency band of the resonator, that is, f= (fl+fh)/2, f represents the center frequency, and fL and fH represent the lowest frequency and the highest frequency in the operating frequency band, respectively. A half-wavelength resonator refers to a resonator having an electrical length equal to λ/2, where the electrical length may be defined as follows: the electrical length of a certain resonator = physical length of the resonator x (propagation time of electromagnetic wave through the resonator/propagation time of electromagnetic wave through air of the same physical length).

Electrical connections, including coupling connections and direct electrical connections. The coupling connection, for example, the coupling connection of the second resonant circuit with the first open end, the coupling connection of the third resonant circuit with the second open end, and the coupling connection appearing hereinafter, may refer to upper and lower layer coupling connection, may refer to staggered coupling connection in the same layer, and specifically, which coupling form is adopted, may be determined according to specific space conditions and the number of devices.

According to the technical scheme, when the feed source feeds power to the first antenna unit and the second antenna unit, the feed signal is divided into two paths of feed signals through the first open end and the second open end of the first resonant circuit and is transmitted to the first antenna unit and the second antenna unit through the second resonant circuit and the third resonant circuit respectively. Meanwhile, in the transmission process of the feed signal, the first resonant circuit, the second resonant circuit and the third resonant circuit also filter the feed signal.

Therefore, in the antenna array provided by the disclosure, the first resonant circuit, the second resonant circuit and the third resonant circuit integrate the filtering function and the power dividing function, so that the filtering function on the feed signal is realized, and the power dividing function is also realized.

And on the premise of realizing the same power division effect and filtering effect, compared with the direct cascading of the power divider and the filter in the related art, the first resonant circuit, the second resonant circuit and the third resonant circuit provided by the disclosure occupy smaller space and generate smaller loss.

Next, on the premise that the power division effect of one-to-two is required to be achieved, and that the feed signal needs to be filtered through N resonators, the antenna array provided by the present disclosure is compared with an antenna array in a related technology:

to achieve the above-described power division effect and filtering effect, the antenna array in the related art requires two filters and one power divider, and each filter includes N resonators coupled. That is, one power divider and 2N resonators are required in total.

When the power supply supplies power to the two antenna units, the power supply signal is divided into two paths of power supply signals after passing through the power divider, so that the power dividing effect of one power divider and two power dividers is realized, but the power divider does not have the filtering effect on the power supply signals. And then, the two paths of feed signals are respectively filtered by N resonators of the two filters and then transmitted to the two antenna units.

The antenna array provided by the present disclosure requires at most 2N-1 resonators to achieve the same power division effect and filtering effect, for example, the first resonant circuit includes one resonator, and the second resonant circuit and the third resonant circuit include N-1 resonators, respectively.

When the feed source feeds power to the first antenna unit and the second antenna unit, the feed signal is divided into two paths of feed signals through the first open end and the second open end of the first resonant circuit and is transmitted to the first antenna unit and the second antenna unit through the second resonant circuit and the third resonant circuit respectively, so that the one-to-two power dividing effect is realized. Meanwhile, the feed signal transmitted to the first antenna unit is filtered through one resonator of the first resonant circuit, and the N-1 resonators (N resonators in total) of the second resonant circuit, and the feed signal transmitted to the second antenna unit is filtered through one resonator of the first resonant circuit, and the N-1 resonators (N resonators in total) of the third resonant circuit.

Therefore, compared with the antenna array of the related art, the antenna array provided by the disclosure at least saves the power divider and one resonator on the premise of realizing the same filtering effect and the power dividing effect, thereby reducing occupied space.

On the other hand, the feed signal is lost during transmission over the power divider and resonator.

In the antenna array of the related art, the feed signal transmitted to each antenna element passes through one power divider and one filter (N resonators) in total, that is, the feed signal is lost in n+1 devices.

In the antenna array provided by the present disclosure, the feed signal transmitted to each antenna unit passes through a first resonant circuit and a second resonant circuit (or a third resonant circuit), and N resonators in total, that is, the feed signal is lost on N devices.

It can be seen that, on the premise of realizing the same filtering effect and power division effect, compared with the antenna array of the related art, the antenna array provided by the disclosure also reduces the loss of the feed signal, thereby reducing the power consumption.

In one possible implementation, the operating frequency bands of the first resonant circuit, the second resonant circuit, and the third resonant circuit are the same.

In one possible implementation manner, the resonator included in the first resonant circuit is a half-wavelength resonator, and the first antenna unit and the second antenna unit are arranged symmetrically in a central manner.

Wherein the electrical length of the half-wavelength resonator is equal to half the wavelength corresponding to the center frequency of the first resonant circuit.

The first antenna unit and the second antenna unit are arranged in a central symmetry mode, and it can be understood that the projection of the first antenna unit and the second antenna unit on the reflecting plate is a central symmetry graph. Alternatively, it is also understood that the first antenna element can coincide with the second antenna element after being rotated 180 ° about a central axis (which is perpendicular to the reflecting plate).

According to the technical scheme provided by the disclosure, when the resonator included in the first resonant circuit is a half-wavelength resonator, phases of feed signals output by the first open end and the second open end of the first resonant circuit are opposite (or are 180 degrees different), and then phases of feed signals received by the first antenna unit and the second antenna unit are opposite.

The first antenna unit and the second antenna unit are arranged in a central symmetry mode, so that the phases of electromagnetic wave signals radiated by the first antenna unit and the second antenna unit are consistent on the premise that the phases of feed signals received by the first antenna unit and the second antenna unit are opposite.

In one possible implementation, the first antenna element and the second antenna element are arranged in a central symmetry about a central point of the first resonant circuit.

In one possible implementation, the second resonant circuit has a third open end coupled to the first open end and a fourth open end electrically connected to the first antenna element. The third resonant circuit has a fifth open end and a sixth open end, the fifth open end is coupled to the second open end, and the sixth open end is electrically connected to the second antenna element.

According to the technical scheme, the second resonant circuit is electrically connected with the open end in the electrical connection mode, and the third resonant circuit is electrically connected with the open end in the electrical connection mode, so that the electrical connection mode of the second resonant circuit and the third resonant circuit is simpler, and the scheme is convenient to realize.

In one possible implementation manner, the fourth open-end, the sixth open-end, the first antenna unit and the second antenna unit are two. The two fourth open ends are respectively electrically connected with the two first antenna units, and the two sixth open ends are respectively electrically connected with the two second antenna units.

According to the technical scheme, the four-in-one power dividing effect is achieved by setting the fourth open end and the sixth open end to be two, so that one power feed source can feed four antenna units, and better radiation performance can be obtained.

In one possible implementation manner, the second resonant circuit includes a first sub-resonant circuit and two second sub-resonant circuits, the first sub-resonant circuit having the third open end and a seventh open end, the second sub-resonant circuit having the fourth open end and an eighth open end, and the seventh open end being coupled to the eighth open ends of the two second sub-resonant circuits. The third resonance circuit comprises a third sub-resonance circuit and two fourth sub-resonance circuits, the third sub-resonance circuit is provided with a fifth open-circuit end and a ninth open-circuit end, the fourth sub-resonance circuit is provided with a sixth open-circuit end and a tenth open-circuit end, and the ninth open-circuit end is coupled with the tenth open-circuit ends of the two fourth sub-resonance circuits.

The first sub-resonant circuit, the second sub-resonant circuit, the third sub-resonant circuit and the fourth sub-resonant circuit can comprise one resonator or a plurality of resonators which are coupled and connected.

According to the technical scheme, the first open end and the second open end of the first resonant circuit are respectively connected with the second resonant circuit and the third resonant circuit in a coupling mode, so that the one-to-two power dividing effect is achieved.

The first sub-resonant circuit of the second resonant circuit is respectively coupled with the two second sub-resonant circuits, and the third sub-resonant circuit of the third resonant circuit is respectively coupled with the two fourth sub-resonant circuits, so that the one-to-two power division effect is realized.

Thus, the two one-to-two power dividing effects realize one-to-four power dividing effects together.

In one possible implementation, the second and third resonant circuits are arranged in central symmetry about a center point of the first resonant circuit.

The second resonant circuit and the third resonant circuit are arranged in a central symmetry mode with respect to the central point of the first resonant circuit, and it can be further understood that the projection of the first resonant circuit, the second resonant circuit and the third resonant circuit on the reflecting plate is a central symmetry pattern, and the central point is the projection of the central point of the first resonant circuit. Alternatively, it is also understood that the second resonant circuit can coincide with the third resonant circuit after being rotated 180 ° about a central axis (which is perpendicular to the reflective plate and passes through the center point of the first resonant circuit).

According to the technical scheme, the second resonant circuit and the third resonant circuit are arranged in a central symmetry mode with respect to the central point of the first resonant circuit, so that the feeding effect of the second resonant circuit on the first antenna unit is guaranteed, and the consistency of the feeding effect of the third resonant circuit on the second antenna unit is guaranteed.

In one possible implementation, the first resonant circuit is configured to be electrically connected to a feed source.

In a possible implementation manner, the antenna array further comprises a filter circuit, and the filter circuit is used for being electrically connected with a feed source and coupled with the first open end or coupled with the second open end.

Wherein the filter circuit comprises a resonator, or a plurality of resonators coupled together.

According to the technical scheme, the filter circuit is arranged, so that the feed signal is filtered by the filter circuit before being transmitted to the first resonant circuit, and the filtering effect of the antenna array is improved.

In one possible implementation manner, the number of the filter circuits is plural, and the operating frequency bands of the plural filter circuits are different.

According to the technical scheme, the filter circuits with different working frequency bands are arranged to be coupled with the first resonant circuit, so that the multi-frequency combining function is realized, and the antenna array can radiate electromagnetic wave signals with multiple frequency bands.

In one possible implementation manner, the first antenna unit includes a first feeding piece and a first radiator, where the first feeding piece and the first radiator are both resonators, and the first feeding piece is electrically connected with the second resonant circuit and is electrically connected with the first radiator. The second antenna unit comprises a second feed piece and a second radiator, the second feed piece and the second radiator are resonators, and the second feed piece is electrically connected with the third resonant circuit and is electrically connected with the second radiator.

Wherein the first and second feeding tabs may also be referred to as feeding probes.

According to the technical scheme, the first feed piece, the first radiator, the second feed piece and the second radiator are arranged to be resonators, so that the antenna unit can filter feed signals, and the filtering effect of the antenna array is improved.

In one possible implementation, the first antenna unit includes a first radiator, the first radiator being a resonator, the first radiator being electrically connected with the second resonant circuit. The second antenna unit comprises a second radiator, the second radiator is a resonator, and the second radiator is electrically connected with the third resonant circuit.

According to the technical scheme, the first radiator and the second radiator are arranged to be resonators, so that the antenna unit can filter feed signals, and the filtering effect of the antenna array is improved.

In a second aspect, the present disclosure provides an antenna comprising a reflector plate and an antenna array according to any one of the first aspects, the antenna array being secured to the reflector plate.

In a third aspect, the present disclosure provides a network device comprising an antenna according to the second aspect.

In one possible implementation, the network device is a base station.

Drawings

Fig. 1 is a schematic diagram of a system architecture of a communication system provided in the present common embodiment;

fig. 2 is a schematic diagram of an application scenario of an antenna according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of an antenna according to an embodiment of the present disclosure;

fig. 4 is a schematic diagram of an antenna array in the related art provided in an embodiment of the present disclosure;

fig. 5 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of an open end provided by an embodiment of the present disclosure;

fig. 7 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

Fig. 8 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

fig. 9 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

fig. 10 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

fig. 11 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

fig. 12 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

fig. 13 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

fig. 14 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

fig. 15 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

fig. 16 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

fig. 17 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

fig. 18 is a schematic diagram of an antenna array provided by an embodiment of the present disclosure;

FIG. 19 is a schematic view of a first radiator provided by an embodiment of the present disclosure;

fig. 20 is a schematic view of a first radiator provided in an embodiment of the present disclosure.

Description of the drawings:

10. antenna, 101, antenna unit, 102, reflecting plate, 103 feed network, 1031, power divider, 1032, combiner, 1033, filter, 1034, transmission component, 1035, phase shifter, 1036, calibration network, 20, holding pole, 30, antenna bracket, 40, antenna housing, 50, radio frequency processing unit, 60, baseband processing unit, 70, transmission line;

1. A first resonant circuit 1a, a first open end, 1b, a second open end;

2. a second resonance circuit 21, a first sub-resonance circuit 22, a second sub-resonance circuit 2a, a third open end 2b, a fourth open end 2c, a seventh open end 2d, an eighth open end;

3. a third resonance circuit 31, a third sub-resonance circuit 32, a fourth sub-resonance circuit 3a, a fifth open end 3b, a sixth open end 3c, a ninth open end 3d, a tenth open end;

4. a first antenna element 41, a first feeding tab 41a, a fourth open end 41b, a fifteenth open end 42, a first radiator 42a, a tenth open end;

5. a second antenna element 51, a second feeding tab 51a, a tenth sixth open end 51b, a tenth seventh open end 52, a second radiator 52a, a nineteenth open end;

6. a filter circuit 61, a first resonator 61a, an eleventh open-end, 61b, a twelfth open-end, 62, a second resonator 62a, a thirteenth open-end;

a. a feeding point.

Detailed Description

Next, an application scenario of the technical solution provided by the embodiments of the present disclosure is described first:

fig. 1 schematically illustrates a system architecture of a communication system to which an embodiment of the present disclosure is applicable, where the system architecture includes a base station and a terminal, and wireless communication may be implemented between the base station and the terminal, as shown in fig. 1.

The base station, which may also be referred to as an access network device, may be located in a base station subsystem (base btation bubsystem, BBS), a terrestrial radio access network (UMTS terrestrial radio access network, UTRAN), or an evolved terrestrial radio access network (evolved universal terrestrial radio access, E-UTRAN) for performing cell coverage of signals to enable communication between the terminal and the wireless network. Specifically, the base station may be a base transceiver station (base transceiver station, BTS) in a global system for mobile communications (global system for mobile comunication, GSM) or (code division multiple access, CDMA) system, a node B (NodeB, NB) in a wideband code division multiple access (wideband code division multiple access, WCDMA) system, an evolved node B (eNB or eNodeB) in a long term evolution (long term evolution, LTE) system, or a radio controller in a cloud radio access network (cloud radio access network, CRAN) scenario. Or the base station may be a relay station, an access point, a vehicle-mounted device, a wearable device, a g node (gnob or gNB) in a New Radio (NR) system, an access network device in a future evolution network, or the like, and the embodiments of the present disclosure are not limited.

The base station is equipped with an antenna to enable transmission of signals in space. Fig. 2 shows a schematic diagram of an application scenario of the antenna provided by the base station shown in fig. 1. Fig. 2 shows the structure of antenna 10, pole 20, antenna mount 30, etc. The antenna 10 may include a radome 40, where the radome 40 has good electromagnetic wave transmission characteristics in terms of electrical performance, and is mechanically resistant to the external harsh environment, so as to protect the antenna system from the external environment. Radome 40 may be mounted to mast 20 or pylon via antenna mount 30 to facilitate the reception or transmission of signals by antenna 10.

In addition, the base station may further include a radio frequency processing unit 50 and a baseband processing unit 60. As shown in fig. 2, the baseband processing unit 60 may be connected to the antenna 10 through the radio frequency processing unit 50. In some examples, the radio frequency processing unit 50 may also be referred to as a remote radio unit (remote radio unit, RRU), and the baseband processing unit 60 may also be referred to as a baseband unit (BBU).

In some examples, as shown in fig. 2, the rf processing unit 50 may be integrally disposed with the antenna 10, and the baseband processing unit 60 may be located at a distal end of the antenna 10, and in this case, the rf processing unit 50 may be collectively referred to as an active antenna unit (active antenna unit, AAU) with the antenna 10. Fig. 2 is only one example of the positional relationship between the rf processing unit 50 and the antenna 10. In other examples, the rf processing unit 50 and the baseband processing unit 60 may also be located at the distal end of the antenna 10 at the same time. The radio frequency processing unit 50 and the baseband processing unit 60 may be connected by a transmission line 70.

Further, fig. 3 is a schematic structural diagram of an antenna 10 according to one possible embodiment of the present disclosure. As shown in fig. 3, the antenna 10 may include an antenna unit 101, a reflecting plate 102, and a feed network 103.

Among them, the antenna unit 101 may also be called an antenna element, an element, a radiating unit, etc., and the antenna unit 101 is a unit constituting a basic structure of an antenna array, which can radiate or receive antenna signals efficiently. The frequencies of the different antenna elements 101 may be the same or different. The reflection plate 102 may also be called a chassis, an antenna panel, a metal reflection surface, or the like, and the reflection plate 102 may reflect and collect a received signal at a receiving point. The antenna unit 101 is typically disposed on one side of the reflecting plate 102, which not only greatly enhances the signal receiving or transmitting capability, but also serves to block and shield interference signals from the back side of the reflecting plate 102 (the back side of the reflecting plate 102 in this disclosure refers to the side opposite to the side of the reflecting plate 102 on which the antenna unit 101 is disposed).

The feed network 103 is located between the antenna unit 101 and the power amplifier of the radio frequency processing unit 50. The feed network 103 may provide specific power and phase to the antenna element 101. For example, the feed network 103 may include a power divider 1031 (or combiner 1032) that may be used in either forward or reverse directions for dividing a signal into multiple signals or combining multiple signals into a single. The feed network 103 may also include a filter 1033 for filtering out interfering signals. For electrically tunable antennas, the feed network 103 may also include a transmission component 1034 to achieve different beam orientations of radiation, and a phase shifter 1035 to change the maximum direction of signal radiation. In some cases, the phase shifter 1035 also has the function of the power divider 1031 (or the combiner 1032), and the power divider 1031 (or the combiner 1032) may be omitted from the feed network. In some examples, the feed network 103 may also include a calibration network 1036 to obtain the required calibration signals. The different devices included in the feed network 103 may be connected by transmission lines and connectors. It should be noted that, the power divider 1031 (or the combiner 1032) may be located inside or outside the radome 40, and the connection relationship between the above-mentioned different components is not unique, and fig. 3 only illustrates one possible location relationship and connection manner of each component.

The antenna elements 101 are typically arranged in an array. The plurality of antenna elements 101 arranged in an array and the feed network 103 for feeding the plurality of antenna elements 101 may be referred to as one antenna array. It is a critical technical problem for the feed network 103 how to divide the power of the feed signal and output it to the plurality of antenna units 101, respectively, and to filter the feed signal.

In order to realize the functions of power division and filtering, as shown in fig. 4, the feed network 103 in the related art includes a power divider and two filters. The filter consists of two resonators which are coupled and connected, and is used for inhibiting interference of electric signals of other frequency bands. The total input end of the power divider is used for being connected with a feed source, the two branch output ends of the power divider are respectively connected with two filters, and the two filters are respectively connected with two antenna units. The resonator is a basic unit in the microwave circuit and has the frequency selection characteristic and the energy storage function.

When the power supply feeds power to the two antenna units, the power feeding signals are input from the total input end of the power divider, are divided into two paths of power feeding signals under the action of the power divider, and are output to the two filters through the two branch output ends respectively. Each filter filters the feed signal and outputs the feed signal to the corresponding antenna unit.

However, the design mode of directly cascading the power divider and the filter occupies a larger space and has larger loss.

In view of the above technical problems, the present disclosure provides an antenna array, as shown in fig. 5, including a first resonant circuit 1, a second resonant circuit 2, a third resonant circuit 3, a first antenna unit 4, and a second antenna unit 5. The first resonant circuit 1 has a first open end 1a and a second open end 1b. The second resonant circuit 2 is coupled to the first open end 1a and electrically connected to the first antenna element 4, and the third resonant circuit 3 is coupled to the second open end 1b and electrically connected to the second antenna element 5.

Wherein the working frequency bands of the first resonance circuit 1, the second resonance circuit 2 and the third resonance circuit 3 are the same.

The first resonant circuit 1, the second resonant circuit 2, and the third resonant circuit 3 include resonators, the number of resonators included in the first resonant circuit 1, the second resonant circuit 2, and the third resonant circuit 3 is not limited in the embodiments of the present disclosure, and in some examples, the first resonant circuit 1, the second resonant circuit 2, and the third resonant circuit 3 include one resonator, and in other examples, include a plurality of coupled resonators.

The types of resonators included in the first resonant circuit 1, the second resonant circuit 2, and the third resonant circuit 3 are not limited in the embodiments of the present disclosure, and the resonators included in the first resonant circuit 1, the second resonant circuit 2, and the third resonant circuit 3 may be single-mode resonators or multimode resonators. In some examples, the resonators comprised by the first, second and third resonant circuits 1, 2, 3, and the resonators appearing hereinafter, may all be transmission line resonators.

The open ends, e.g. the first open end 1a, the second open end 1b and the open ends appearing hereinafter, refer to a region of the resonator comprising the ends. In some examples, as shown in fig. 6, when the resonator is a half-wavelength resonator, the region may be defined as a region of one end of the resonator toward a center point λ/8 of the resonator. Wherein λ refers to a wavelength corresponding to a center frequency of the resonator, the center frequency refers to an intermediate value of a sum of a lowest frequency and a highest frequency of an operating frequency band of the resonator, that is, f= (fl+fh)/2, f represents the center frequency, and fL and fH represent the lowest frequency and the highest frequency in the operating frequency band, respectively. A half-wavelength resonator refers to a resonator having an electrical length equal to λ/2, where the electrical length may be defined as follows: the electrical length of a certain resonator = physical length of the resonator x (propagation time of electromagnetic wave through the resonator/propagation time of electromagnetic wave through air of the same physical length).

Electrical connections, including coupling connections and direct electrical connections. The coupling connection, for example, the coupling connection of the second resonant circuit 2 with the first open end 1a, the coupling connection of the third resonant circuit 3 with the second open end 1b, and the coupling connection appearing hereinafter, may refer to upper and lower layer coupling connection, or may refer to staggered coupling connection in the same layer, which coupling form is specifically adopted, and may be determined according to specific space conditions and the number of devices.

It should be noted that the first resonant circuit 1, the second resonant circuit 2, and the third resonant circuit 3 may be considered as the feeding network 103, or a part of the feeding network 103. The antenna array provided by the embodiments of the present disclosure may further include the transmission component 1034, the phase shifter 1035, the calibration network 1036, and the like described above, in addition to the first resonant circuit 1, the second resonant circuit 2, and the third resonant circuit 3. The first antenna element 4 and the second antenna element 5 may be considered as two of the above-described antenna elements 101.

In addition, in order to facilitate the display of the structure of the antenna array, in fig. 8 to 9, 12 to 15, and 17 to 18, the radiators of the first antenna unit 4 and the second antenna unit 5 are subjected to perspective processing.

According to the technical scheme provided by the embodiment of the disclosure, when the feed source feeds the first antenna unit 4 and the second antenna unit 5, the feed signal is divided into two paths of feed signals through the first open end 1a and the second open end 1b of the first resonant circuit 1, and the two paths of feed signals are transmitted to the first antenna unit 4 and the second antenna unit 5 through the second resonant circuit 2 and the third resonant circuit 3 respectively. Meanwhile, the first resonant circuit 1, the second resonant circuit 2 and the third resonant circuit 3 also filter the feed signal during transmission.

Therefore, in the antenna array provided by the embodiment of the disclosure, the first resonant circuit 1, the second resonant circuit 2 and the third resonant circuit 3 integrate the filtering function and the power dividing function, so that the filtering function on the feed signal is realized, and the power dividing function is also realized.

And, on the premise of realizing the same power division effect and filtering effect, compared with the direct cascading of the power divider and the filter in the related art, the first resonant circuit 1, the second resonant circuit 2 and the third resonant circuit 3 provided by the embodiment of the disclosure occupy smaller space and generate smaller loss.

Next, on the premise that the power division effect of one-to-two is required to be achieved, and that the feed signal needs to be filtered by N resonators, the antenna array provided in the embodiment of the present disclosure is compared with an antenna array in the related art:

The antenna array provided by the embodiment of the disclosure needs 2N-1 resonators to achieve the same power division effect and filtering effect. The first resonant circuit 1 comprises one resonator, and the second resonant circuit 2 and the third resonant circuit 3 each comprise N-1 resonators.

When the feed source feeds the first antenna unit 4 and the second antenna unit 5, the feed signal is divided into two paths of feed signals through the first open end 1a and the second open end 1b of the first resonant circuit 1, and the two paths of feed signals are transmitted to the first antenna unit 4 and the second antenna unit 5 through the second resonant circuit 2 and the third resonant circuit 3 respectively, so that a one-to-two power division effect is realized. Meanwhile, the feed signal transmitted to the first antenna unit 4 is filtered through one resonator of the first resonant circuit 1 and the N-1 resonators (N resonators in total) of the second resonant circuit 2, and the feed signal transmitted to the second antenna unit 5 is filtered through one resonator of the first resonant circuit 1 and the N-1 resonators (N resonators in total) of the third resonant circuit 3.

Therefore, compared with the antenna array of the related art, the antenna array provided by the embodiment of the disclosure saves at least one resonator and one power divider on the premise of realizing the same filtering effect and the same power dividing effect, thereby reducing occupied space.

In the antenna array provided in the embodiment of the present disclosure, the feeding signal transmitted to each antenna element passes through a first resonant circuit 1 and a second resonant circuit 2 (or a third resonant circuit 3), and N resonators in total, that is, the feeding signal is lost on N devices.

It can be seen that, on the premise of realizing the same filtering effect and power division effect, compared with the antenna array of the related art, the antenna array provided by the embodiment of the disclosure further reduces the loss of the feed signal, thereby reducing the power consumption.

The embodiment of the present disclosure is not limited to the electrical lengths of the resonators included in the first resonance circuit 1, the second resonance circuit 2, and the third resonance circuit 3.

In some examples, the first resonant circuit 1 comprises a resonator that is a half-wavelength resonator. Wherein the electrical length of the half-wavelength resonator is equal to half the wavelength corresponding to the center frequency of the first resonant circuit 1.

Accordingly, the resonators included in the second and third resonance circuits 2 and 3 may be half-wavelength resonators.

In the case where the first resonant circuit 1 includes a resonator that is a half-wavelength resonator, the phases of the feed signals output from the first open end 1a and the second open end 1b of the first resonant circuit 1 are opposite (or referred to as 180 ° out of phase), and the phases of the feed signals received by the first antenna unit 4 and the second antenna unit 5 are also opposite.

In order to ensure the coincidence of the phases of the electromagnetic wave signals radiated by the first antenna unit 4 and the second antenna unit 5, in some examples, as shown in fig. 8 to 11, the first antenna unit 4 and the second antenna unit 5 are arranged in a center-symmetrical manner.

With reference to fig. 11, the first antenna unit 4 and the second antenna unit 5 are arranged in a central symmetry manner, which means that the first antenna unit 4 and the second antenna unit 5 are identical and are arranged in opposite directions.

For the first antenna element 4 and the second antenna element 5 which are identical and are arranged in opposite directions, if the feeding signals are inputted at the same ends (i.e., the eighteenth open end 42a and the nineteenth open end 52 a) of the first antenna element 4 and the second antenna element 5, the feeding directions of the two feeding signals are opposite (as indicated by the dotted arrows in fig. 11).

If the phases of the two feed signals are identical, the phases of the electromagnetic wave signals radiated from the first antenna unit 4 and the second antenna unit 5 may differ by 180 °, whereas if the phases of the two feed signals differ by 180 °, the phases of the electromagnetic wave signals radiated from the first antenna unit 4 and the second antenna unit 5 differ by 360 °, i.e., the phases of the electromagnetic wave signals radiated from the first antenna unit 4 and the second antenna unit 5 coincide.

The first antenna unit 4 and the second antenna unit 5 are arranged in a central symmetry manner, and it is also understood that the projections of the first antenna unit 4 and the second antenna unit 5 on the reflecting plate 102 are in a central symmetry pattern.

Alternatively, it is also understood that the first antenna element 4 can be overlapped with the second antenna element 5 after being rotated 180 ° about a central axis (which is perpendicular to the reflecting plate 102).

The center points corresponding to the center symmetrical arrangement of the first antenna unit 4 and the second antenna unit 5 are not limited in the embodiments of the present disclosure, and in some examples, as shown in fig. 9 and 11, the first antenna unit 4 and the second antenna unit 5 are arranged in a center symmetrical manner with respect to the center point o of the first resonant circuit 1.

In other examples, the first resonator 1 may also comprise a full wavelength resonator. Wherein the electrical length of the full wavelength resonator is equal to the wavelength corresponding to the center frequency of the first resonant circuit 1.

In the case where the resonator included in the first resonant circuit 1 is a full-wavelength resonator, the phases of the feed signals output by the first open end 1a and the second open end 1b of the first resonant circuit 1 are identical, and the phases of the feed signals received by the first antenna unit 4 and the second antenna unit 5 are identical, so as to ensure that the phases of the electromagnetic wave signals radiated by the first antenna unit 4 and the second antenna unit 5 are identical, the postures of the first antenna unit 4 and the second antenna unit 5 should be kept identical.

The first antenna unit 4 and the second antenna unit 5 are kept in the same posture, and it is also understood that the first antenna unit 4 can be overlapped with the second antenna unit 5 after being translated.

Alternatively, it is also understood that the first antenna element 4 and the second antenna element 5 are oriented in the same direction, arranged in the same direction, and the like.

In order to ensure consistency of the feeding effect of the second resonant circuit 2 to the first antenna element 4 and the feeding effect of the third resonant circuit 3 to the second antenna element 5, in some examples, as shown in fig. 9 and 11, the second resonant circuit 2 and the third resonant circuit 3 are arranged in central symmetry with respect to the center point o of the first resonant circuit 1.

The second resonant circuit 2 and the third resonant circuit 3 are arranged in a central symmetry manner about the central point o of the first resonant circuit 1, which is understood to mean that the projections of the first resonant circuit 1, the second resonant circuit 2 and the third resonant circuit 3 on the reflecting plate 102 are in a central symmetry pattern, and the central point is the projection of the central point o of the first resonant circuit 1.

Alternatively, it is also understood that the second resonant circuit 2 can coincide with the third resonant circuit 3 after being rotated 180 ° about the central axis (which is perpendicular to the reflecting plate 102 and passes through the o-point).

In some examples, the coupling connection manner of the second resonant circuit 2 and the first resonant circuit 1, the electrical connection manner of the third resonant circuit 3 and the first resonant circuit 1, and the electrical connection manner of the second resonant circuit 5 are all open-end coupling or open-end electrical connection.

As illustrated in fig. 8 to 18, the second resonant circuit 2 has a third open end 2a and a fourth open end 2b, the third open end 2a being coupled to the first open end 1a, and the fourth open end 2b being electrically connected to the first antenna element 4. The third resonant circuit 3 has a fifth open end 3a and a sixth open end 3b, the fifth open end 3a being coupled to the second open end 1b, the sixth open end 3b being electrically connected to the second antenna element 5.

The number of the first antenna element 4 and the second antenna element 5 is not limited in the embodiments of the present disclosure, and in some examples, as shown in fig. 7 to 16, the first antenna element 4 and the second antenna element 5 are each one. In other examples, as shown in fig. 17 to 18, the first antenna element 4 and the second antenna element 5 are two, and thus, better radiation performance can be obtained.

In the following, the implementation of the second and third resonant circuits 2 and 3, respectively, is illustrated for both cases:

in some examples, as shown in fig. 8-16, the fourth open end 2b and the sixth open end 3b are each one.

As shown in fig. 8-16, the second resonant circuit 2 comprises one resonator and the third resonant circuit 3 comprises one resonator.

In other examples, as shown in fig. 17 and 18, the fourth open-circuit end 2b and the sixth open-circuit end 3b are two, the two fourth open-circuit ends 2b are electrically connected to the two first antenna elements 4, and the two sixth open-circuit ends 3b are electrically connected to the two second antenna elements 5, respectively.

As illustrated in fig. 17 and 18, the second resonant circuit 2 includes a first sub-resonant circuit 21 and two second sub-resonant circuits 22, the first sub-resonant circuit 21 having a third open end 2a and a seventh open end 2c, the second sub-resonant circuit 22 having a fourth open end 2b and an eighth open end 2d, the seventh open end 2c being coupled to the eighth open ends 2d of the two second sub-resonant circuits 22.

The third resonance circuit 3 comprises a third sub-resonance circuit 31 and two fourth sub-resonance circuits 32, the third sub-resonance circuit 31 having a fifth open end 3a and a ninth open end 3c, the fourth sub-resonance circuit 32 having a sixth open end 3b and a tenth open end 3d, the ninth open end 3c being coupled to the tenth open ends 3d of the two fourth sub-resonance circuits 32.

The first sub-resonant circuit 21, the second sub-resonant circuit 22, the third sub-resonant circuit 31, and the fourth sub-resonant circuit 32 may include one resonator or may include a plurality of resonators coupled together.

According to the technical scheme provided by the embodiment of the disclosure, the first open end 1a and the second open end 1b of the first resonant circuit 1 are respectively coupled with the second resonant circuit 2 and the third resonant circuit 3, so that a one-to-two power division effect is realized.

By arranging the first sub-resonant circuit 21 of the second resonant circuit 2 to be coupled to the two second sub-resonant circuits 22, respectively, and the third sub-resonant circuit 31 of the third resonant circuit 3 to be coupled to the two fourth sub-resonant circuits 32, respectively, a one-to-two power splitting effect is also achieved.

In some examples, to facilitate the arrangement of the second and third resonant circuits 2 and 3, as shown in fig. 17 and 18, two second sub-resonant circuits 22 are located on both sides of the first sub-resonant circuit 21, respectively, and two fourth sub-resonant circuits 32 are located on both sides of the third sub-resonant circuit 31, respectively.

In some examples, as shown in fig. 7-11, the first resonant circuit 1 is used for electrical connection with a feed source, i.e. the feed point a is located in the first resonant circuit 1.

The specific position of the feeding point a is not limited in the embodiments of the present disclosure, and in some examples, the resonator included in the first resonant circuit 1 is a half-wavelength resonator, and the feeding point a is located at any position on the resonator included in the first resonant circuit 1 except for the center point. In particular where it is, depending on the required operating bandwidth of the first resonant circuit 1, the closer the feed point a is to the edge bandwidth of the resonator the wider.

When the feeding point a is located at the ground point, the feeding source is directly grounded, and the energy of the feeding signal cannot be output from the two open ends of the first resonant circuit 1.

In order to improve the filtering effect, in some examples, as shown in fig. 12, the antenna array further includes a filtering circuit 6, where the filtering circuit 6 is electrically connected to the feeding source and is coupled to the first open end 1 a. Of course, the filter circuit 6 may also be coupled to the second open end 1b, which is not limited by the embodiment of the disclosure.

In this way, the feeding signal is transmitted from the feeding source to the filter circuit 6, and the filtering circuit 6 filters the feeding signal and then transmits the feeding signal to the first resonant circuit 1, and the feeding signal is transmitted to the first antenna unit 4 after being filtered by the first resonant circuit 1 and the second resonant circuit 2, and is transmitted to the second antenna unit 5 after being filtered by the first resonant circuit 1 and the third resonant circuit 3.

The embodiments of the present disclosure are not limited to the implementation of the filter circuit 6, and in some examples, the filter circuit 6 has one resonator, and in other examples, as shown in fig. 12, the filter circuit 6 may also have a plurality of resonators coupled together.

As illustrated in fig. 12, the filter circuit 6 includes a first resonator 61 and a second resonator 62, the first resonator 61 being coupled to the first open end 1a or the second open end 1b, the second resonator 62 being coupled to the first resonator 61 and being electrically connected to the power supply.

In this way, the feeding signal is transmitted from the feeding source to the second resonator 62, and is transmitted to the first resonator 61 after being filtered by the second resonator 62, and is transmitted to the first resonant circuit 1 after being filtered by the first resonator 61.

The coupling connection manner of the first resonator 61 and the second resonator 62 is not limited in the embodiment of the present disclosure, and in some examples, as shown in fig. 12, the first resonator 61 has an eleventh open end 61a and a twelfth open end 61b, and the second resonator 62 has a thirteenth open end 62a. The thirteenth open end 62a of the second resonator 62 is coupled to the eleventh open end 61a of the first resonator 61, and the twelfth open end 61b of the first resonator 61 is coupled to the first open end 1a (or the second open end 1 b).

The position of the feeding point a in the filter circuit 6 is not limited in the embodiments of the present disclosure, and in some examples, the filter circuit 6 includes a resonator that is a half-wavelength resonator (the electrical length of the half-wavelength resonator is equal to half of the wavelength corresponding to the center frequency of the filter circuit 6), and the feeding point a is located at any position of the resonator (such as the second resonator 62) of the filter circuit 6 except the center point. The particular location depends on the operating bandwidth required by the filter circuit 6. Wherein the closer the feed point a is to the edge of the first resonant circuit 1 the wider the bandwidth is achieved.

In order to expand the operating frequency band of the antenna array, as shown in fig. 13-16, in some examples, the filter circuits 6 are multiple, and the operating frequency bands of the multiple filter circuits 6 are different and coupled to the first open end 1a or the second open end 1b of the first resonant circuit 1, so that a multi-frequency combining function is implemented, so that the antenna array can radiate electromagnetic wave signals of multiple frequency bands.

Wherein the operating frequency bands of the plurality of filter circuits 6 are all located within the operating frequency band of the first resonant circuit 1.

Each filter circuit 6 may comprise a resonator that is a half-wavelength resonator, and the electrical length of each half-wavelength resonator is equal to half the wavelength corresponding to the center frequency of the filter circuit 6. Since the operating frequency bands of the plurality of filter circuits 6 are different, the electric lengths of resonators included in different filter circuits 6 are also different (as shown in fig. 13 to 15).

The number and arrangement of the filter circuits 6 are not limited in the embodiment of the present disclosure, and the following is an exemplary description:

in some examples, as shown in fig. 13, the filter circuits 6 are two.

In some examples, as shown in fig. 13, in order to facilitate the arrangement of the two filter circuits 6, the two filter circuits 6 are coupled to the first open end 1a and the second open end 1b of the first resonant circuit 1, respectively. Also, two filter circuits 6 may be located on both sides of the first resonant circuit 1.

Of course, the two filter circuits 6 may also be coupled to the same open end (the first open end 1a or the second open end 1 b), which is not limited in the embodiment of the disclosure.

In other examples, as shown in fig. 14 and 15, the filter circuits 6 are four.

In some examples, as shown in fig. 14 and 15, in order to facilitate the arrangement of four filter circuits 6, two filter circuits 6 are coupled to the first open end 1a of the first resonant circuit 1, and the other two filter circuits 6 are coupled to the second open end 1b of the first resonant circuit 1.

Next, a relationship of center frequencies of the first resonance circuit 1, the second resonance circuit 2, the third resonance circuit 3, and the plurality of filter circuits 6 is exemplarily described:

In some examples, the center frequencies f0 of the first, second, and third resonant circuits 1, 2, 3 are the same, and f0= (f1+ & gt fn)/n.

Where n is the number of filter circuits 6 and fn is the center frequency of the nth filter circuit. Of course, f0 may also be tuned to any frequency within the entire frequency bandwidth of f1+ + fn.

The implementation manner of the first antenna unit 4 and the second antenna unit 5 is not limited in the embodiment of the present disclosure, and the following is exemplified:

in some examples, as shown in fig. 8-9 and 12-18, the first antenna unit 4 includes a first feeding tab 41 and a first radiator 42, the first feeding tab 41 being electrically connected to the second resonant circuit 2 and electrically connected to the first radiator 42. The second antenna element 5 includes a second feeding tab 51 and a second radiator 52, the second feeding tab 51 being electrically connected to the third resonant circuit 3 and to the second radiator 52.

Among them, the first and second feeding sheets 41 and 51 may also be referred to as feeding probes, and the first and second radiators 42 and 52 serve to radiate and receive electromagnetic wave signals. The first radiator 42 and the second radiator 52 may also be referred to as antenna elements, etc.

In some examples, to further enhance the filtering effect, the first feeding tab 41 and the first radiator 42 may both be resonators, and the second feeding tab 51 and the second radiator 52 may both be resonators.

Illustratively, the first feed tab 41, the first radiator 42, the second feed tab 51, and the second radiator 52 are half-wavelength resonators. Wherein the electrical length of the half-wavelength resonator is equal to half the wavelength corresponding to the center frequency of the first resonant circuit 1.

The form of the first feeding tab 41 and the second feeding tab 51 is not limited in the embodiments of the present disclosure, and in some examples, as shown in fig. 8, the first feeding tab 41 and the second feeding tab 51 are inverted L-shaped metal pieces, including two metal segments that intersect (e.g., are perpendicular) and are connected.

As shown in fig. 8, the first feeding tab 41 has a fourteenth open end 41a and a fifteenth open end 41b, the fourteenth open end 41a being coupled to or directly electrically connected with the fourth open end 2b of the second resonance circuit 2, the fifteenth open end 41b being coupled to or directly electrically connected with the first radiator 42. The second feeding tab 51 has a sixteenth open end 51a and a seventeenth open end 51b, the sixteenth open end 51a being coupled or directly electrically connected to the sixth open end 3b of the third resonant circuit 3, the seventeenth open end 51b being coupled or directly electrically connected to the second radiator 52.

In other examples, as shown in fig. 14, the first feeding tab 41 and the second feeding tab 51 are inverted U-shaped metal pieces, and are mainly used for controlling current balance on the left and right sides of the first feeding tab 41 and the left and right sides of the second feeding tab 51, and coupling energy to the first radiator 42 and the second radiator 52, so as to improve the radiation performance and out-of-band rejection effect of the antenna.

As shown in fig. 14, the first feeding tab 41 has a fourteenth open end 41a, the fourteenth open end 41a is coupled to or directly electrically connected with the fourth open end 2b of the second resonant circuit 2, and the first feeding tab 41 is coupled to the center of the first radiator 42. The second feed tab 51 has a sixteenth open end 51a, the sixteenth open end 51a being coupled or directly electrically connected to the sixth open end 3b of the third resonant circuit 3, the second feed tab 51 being coupled centrally to the second radiator 52.

The polarization states of the first radiator 42 and the second radiator 52 are not limited in the embodiments of the present disclosure, and in some examples, the polarization states of the first radiator 42 and the second radiator 52 are ±45° dual polarization states. Of course, the polarization state may be 0 °, 90 °, circular polarization state, or the like.

The distance between the first antenna unit 4 and the second antenna unit 5 is not limited in the embodiments of the present disclosure, and in some examples, the distance between the first antenna unit 4 and the second antenna unit 5 is between 0.5λ ' -1λ ', where λ ' refers to a wavelength corresponding to a center frequency of the first resonant circuit 1.

In other examples, as shown in fig. 10, the first antenna unit 4 may also include only the first radiator 42, and the first radiator 42 is electrically connected to the second resonant circuit 2, so that the second resonant circuit 2 may directly feed the first radiator 42. The second antenna element 5 may also comprise only the second radiator 52, the second radiator 52 being electrically connected to the third resonance circuit 3, whereby the third resonance circuit 3 may directly feed the second radiator 52.

The first radiator 42 and the second resonant circuit 2 may be electrically connected directly or by coupling. The second radiator 52 and the third resonant circuit 3 may be electrically connected directly or by coupling.

In some examples, to further enhance the filtering effect, the first radiator 42 may be a resonator and the second radiator 52 may also be a resonator.

Illustratively, as shown in fig. 10, the first radiator 42 has a tenth open end 42a, the second radiator 52 has a nineteenth open end 52a, the tenth open end 42a of the first radiator 42 is coupled or directly electrically connected to the fourth open end 2b of the second resonant circuit 2, and the nineteenth open end 52a of the second radiator 52 is coupled or directly electrically connected to the sixth open end 3b of the third resonant circuit 3.

The structure of the first radiator 42 and the second radiator 52 is not limited in the embodiments of the present disclosure, and in some examples, as shown in fig. 8 to 18, the first radiator 42 and the second radiator 52 are planar structures, for example, patch structures as shown in fig. 8 to 9 and 12 to 18, and further for example, stripe structures as shown in fig. 10 and 11.

In other examples, as shown in fig. 19 and 20 (with first radiator 42 as an example), first radiator 42 and second radiator 52 are illustrated in a three-dimensional configuration.

The disclosed embodiment also provides an antenna 10, as shown in fig. 7-18, where the antenna 10 includes a reflecting plate 102 and the antenna array described above, and the antenna array is fixed on the reflecting plate 102.

The type of the antenna is not limited in the embodiments of the present disclosure, and the antenna provided in the embodiments of the present disclosure may be a large-scale multiple-input multiple-output (MIMO) antenna, for example, a frequency division duplex (frequency division duplex, FDD) MIMO antenna, a time division duplex (time division duplex, TDD) MIMO antenna. The antenna array may be one channel of a MIMO antenna or a plurality of antenna arrays form one channel of a MIMO antenna.

Reference is made to the foregoing, and fig. 2 and 3, for specific technical features of the antenna 10, which are not repeated herein.

The embodiment of the disclosure also provides a network device, which comprises the antenna.

In some examples, the network device is a base station having the above-described antenna.

The terminology used in the description section of the present disclosure is for the purpose of describing particular embodiments of the disclosure only and is not intended to be limiting of the disclosure. Unless otherwise defined, technical or scientific terms used in this commonly-used embodiment should be given the ordinary meaning as understood by one of ordinary skill in the art to which this commonly-used embodiment belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes. "plurality" means two or more, unless expressly defined otherwise.

The foregoing description of the preferred embodiments is merely illustrative of the principles of the present disclosure, and not in limitation thereof, and any modifications, equivalents, improvements and/or the like may be made within the principles of the present disclosure.

Claims

1. An antenna array, characterized in that the antenna array comprises a first resonant circuit (1), a second resonant circuit (2), a third resonant circuit (3), a first antenna element (4) and a second antenna element (5);

the first resonant circuit (1) has a first open end (1 a) and a second open end (1 b);

the second resonant circuit (2) is coupled with the first open end (1 a) and is electrically connected with the first antenna unit (4), and the third resonant circuit (3) is coupled with the second open end (1 b) and is electrically connected with the second antenna unit (5).

2. An antenna array according to claim 1, characterized in that the first resonant circuit (1), the second resonant circuit (2) and the third resonant circuit (3) have the same frequency band of operation.

3. An antenna array according to claim 1 or 2, characterized in that the first resonant circuit (1) comprises a resonator which is a half-wavelength resonator, the first antenna element (4) and the second antenna element (5) being arranged centrally symmetrically.

4. An antenna array according to any of claims 1-3, characterized in that the second resonant circuit (2) has a third open end (2 a) and a fourth open end (2 b), the third open end (2 a) being coupled to the first open end (1 a), the fourth open end (2 b) being electrically connected to the first antenna element (4);

the third resonant circuit (3) is provided with a fifth open end (3 a) and a sixth open end (3 b), the fifth open end (3 a) is coupled with the second open end (1 b), and the sixth open end (3 b) is electrically connected with the second antenna unit (5).

5. The antenna array according to claim 4, characterized in that the fourth open-end (2 b), the sixth open-end (3 b), the first antenna element (4) and the second antenna element (5) are all two;

the two fourth open ends (2 b) are respectively and electrically connected with the two first antenna units (4), and the two sixth open ends (3 b) are respectively and electrically connected with the two second antenna units (5).

6. The antenna array according to claim 5, characterized in that the second resonant circuit (2) comprises a first sub-resonant circuit (21) and two second sub-resonant circuits (22), the first sub-resonant circuit (21) having the third open end (2 a) and a seventh open end (2 c), the second sub-resonant circuit (22) having the fourth open end (2 b) and an eighth open end (2 d), the seventh open end (2 c) being coupled to the eighth open end (2 d) of both second sub-resonant circuits (22);

The third resonance circuit (3) comprises a third sub resonance circuit (31) and two fourth sub resonance circuits (32), the third sub resonance circuit (31) is provided with a fifth open end (3 a) and a ninth open end (3 c), the fourth sub resonance circuit (32) is provided with a sixth open end (3 b) and a tenth open end (3 d), and the ninth open end (3 c) is coupled with the tenth open ends (3 d) of the two fourth sub resonance circuits (32).

7. An antenna array according to any of claims 1-6, characterized in that the second (2) and the third (3) resonant circuit are arranged in central symmetry with respect to the centre point of the first resonant circuit (1).

8. An antenna array according to any of claims 1-7, characterized in that the first resonant circuit (1) is adapted to be electrically connected to a feed source.

9. The antenna array according to any of claims 1-7, characterized in that the antenna array further comprises a filter circuit (6);

the filter circuit (6) is used for being electrically connected with a feed source and is coupled with the first open end (1 a) or coupled with the second open end (1 b).

10. An antenna array according to claim 9, characterized in that the number of filter circuits (6) is plural, the operating frequency bands of the plural filter circuits (6) being different.

11. The antenna array according to any of claims 1-10, wherein the first antenna element (4) comprises a first feed tab (41) and a first radiator (42), the first feed tab (41) and the first radiator (42) being resonators, the first feed tab (41) being electrically connected with the second resonant circuit (2) and with the first radiator (42);

the second antenna unit (5) comprises a second feeding sheet (51) and a second radiator (52), the second feeding sheet (51) and the second radiator (52) are resonators, and the second feeding sheet (51) is electrically connected with the third resonant circuit (3) and is electrically connected with the second radiator (52).

12. The antenna array according to any of the claims 1-10, characterized in that the first antenna element (4) comprises a first radiator (42), the first radiator (42) being a resonator, the first radiator (42) being electrically connected with the second resonance circuit (2);

the second antenna unit (5) comprises a second radiator (52), the second radiator (52) is a resonator, and the second radiator (52) is electrically connected with the third resonant circuit (3).

13. An antenna comprising a reflector plate and an antenna array according to any one of claims 1-12, the antenna array being secured to the reflector plate.

14. A network device comprising the antenna of claim 13.

15. The network device of claim 14, wherein the network device is a base station.