Antenna array and communication system

Abstract

The antenna array comprises a first sub-array, a second sub-array, a first feed structure, a second feed structure, a third feed structure and a fourth feed structure, the first sub-array comprises a plurality of first oscillators, and the second sub-array comprises a plurality of second oscillators; the feed directions of the first feed structure and the third feed structure are the same and are different from the feed direction of the second feed structure, and the feed direction of the second feed structure is the same as the feed direction of the fourth feed structure; the first feeding points of part of the first oscillators are connected with the first feeding structure, the second feeding points of the part of the first oscillators are connected with the second feeding structure, the first feeding points of the other part of the first oscillators are connected with the third feeding structure, and the second feeding points of the other part of the first oscillators are connected with the fourth feeding structure; the third feeding points of part of the second oscillators are connected with the third feeding structure, the second feeding points of the part of the second oscillators are connected with the fourth feeding structure, the third feeding points of the other part of the second oscillators are connected with the first feeding structure, and the fourth feeding points of the other part of the second oscillators are connected with the second feeding structure.

Description

Antenna array and communication system TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of communication, and particularly relates to an antenna array and a communication system. BACKGROUND

[0002] In some specific scenarios, such as signal coverage of sea areas and signal deep coverage of large venues, narrow-beam antennas need to be deployed. The signal coverage of sea areas is to install a base station on a mountain near the coast, and transmit signals from the mountain to the sea area for signal coverage of the sea area. The horizontal half-power beam width of a traditional base station antenna is about 65 degrees. After networking, the overlapping area of adjacent base stations in a coverage range of 5-10 kilometers is large, which will cause serious signal interference to the residents on the coast. Therefore, narrow-beam base station antennas need to be used in this scenario. When networking, the traditional base station antennas and the narrow-beam base station antennas need to be used in cooperation to reduce the signal interference to the residents on the coast.

[0003] For deep coverage of large venues, the stands and the inner field area of the large venue are the audience-intensive areas. However, due to the building structure of the large venue being reinforced concrete, it will cause serious signal transmission loss to the macro station. At the same time, the large venue is designed as a semi-open type, and the beam width of the ordinary omnidirectional ceiling antenna and wall-mounted antenna is wide, and the gain is low, and the signal interference of the adjacent area is serious. Therefore, the signal coverage problem of the large venue cannot be solved by simply using outdoor macro stations or ordinary indoor coverage. In order to solve the problem of deep coverage in the large venue, the stands and the inner field can be divided into multiple small areas, and narrow-beam antennas are used to directionally cover each small area, which can reduce the same-frequency interference of adjacent small areas, and is one of the solutions to the signal coverage in the large venue. Therefore, it is an urgent technical problem to provide a narrow-beam antenna.

[0004] SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art, and provides an antenna array and a communication system.

[0006] The present disclosure provides an antenna array, which comprises a first subarray, a second subarray, a first feeding structure, a second feeding structure, a third feeding structure and a fourth feeding structure; wherein,

[0007] The first subarray comprises a plurality of first dipoles, and the second subarray comprises a plurality of second dipoles; the feeding directions of the first feeding structure and the third feeding structure are the same, and different from the feeding direction of the second feeding structure, and the feeding direction of the second feeding structure is the same as the feeding direction of the fourth feeding structure;

[0008] The first vibrator has a first feeding point and a second feeding point, and the second vibrator has a third feeding point and a fourth feeding point; wherein,

[0009] The first feeding point of part of the first vibrators is connected to the first feeding structure, and the second feeding point is connected to the second feeding structure; the first feeding point of another part of the first vibrators is connected to the third feeding structure, and the second feeding point is connected to the fourth feeding structure;

[0010] The third feeding point of part of the second vibrators is connected to the third feeding structure, and the fourth feeding point is connected to the fourth feeding structure; the third feeding point of another part of the second vibrators is connected to the first feeding structure, and the fourth feeding point is connected to the second feeding structure.

[0011] The first vibrator and the second vibrator are one-to-one corresponding, and for the corresponding first vibrator and the second vibrator, one of the first feeding point of the first vibrator and the third feeding point of the second vibrator is connected to the first feeding structure, and the other is connected to the third feeding structure; one of the second feeding point of the second vibrator and the fourth feeding point of the second vibrator is connected to the second feeding structure, and the other is connected to the fourth feeding structure.

[0012] The antenna array further comprises a phase adjustment structure, which is arranged at least one of the following positions:

[0013] Between the first feeding structure and the first feeding point connected thereto;

[0014] Between the first feeding structure and the third feeding point connected thereto;

[0015] Between the second feeding structure and the second feeding point connected thereto;

[0016] Between the second feeding structure and the fourth feeding point connected thereto;

[0017] Between the third feeding structure and the first feeding point connected thereto;

[0018] Between the third feeding structure and the third feeding point connected thereto;

[0019] Between the fourth feeding structure and the second feeding point connected thereto;

[0020] Between the fourth feeding structure and the fourth feeding point connected thereto.

[0021] The phase adjustment structure comprises a phase shifter.

[0022] The first feeding structure, the second feeding structure, the third feeding structure, and the fourth feeding structure are all power dividers.

[0023] The first vibrator is a cross-polarized vibrator, and / or the second vibrator is a cross-polarized vibrator.

[0024] The cross-polarized vibrator is a bowl-shaped vibrator or a cross-dipole.

[0025] The present disclosure provides an antenna array, which includes a first subarray, a second subarray, a first feeding structure, a second feeding structure, a third feeding structure, and a fourth feeding structure.

[0026] The first subarray includes a plurality of first vibrators, and the second subarray includes a plurality of second vibrators; the first vibrator has a first feed point and a second feed point, and the second vibrator has a third feed point and a fourth feed point; the feeding directions of the first feeding structure and the third feeding structure are the same, and different from the feeding direction of the second feeding structure, and the feeding direction of the second feeding structure is the same as the feeding direction of the fourth feeding structure; wherein,

[0027] A first radio frequency switch is arranged between the first feeding structure and the first feed point of the first vibrator and the third feed point of the second vibrator, and a second radio frequency switch is arranged between the second feeding structure and the second feed point of the first vibrator and the fourth feed point of the second vibrator;

[0028] A third radio frequency switch is arranged between the third feeding structure and the first feed point of the first vibrator and the third feed point of the second vibrator, and a fourth radio frequency switch is arranged between the fourth feeding structure and the second feed point of the first vibrator and the fourth feed point of the second vibrator.

[0029] The first radio frequency switch, the second radio frequency switch, the third radio frequency switch, and the fourth radio frequency switch are all single-pole double-throw switches.

[0030] The first radio frequency switch is configured to connect the first feeding structure to one of the first feed point of the first vibrator and the third feed point of the second vibrator.

[0031] The second radio frequency switch is configured to connect the second feeding structure to one of the second feed point of the first vibrator and the fourth feed point of the second vibrator.

[0032] The third radio frequency switch is configured to connect the third feeding structure to one of the first feed point of the first vibrator and the third feed point of the second vibrator.

[0033] The fourth radio frequency switch is configured to connect the fourth feeding structure with one of the second feeding point of the first oscillator and the fourth feeding point of the second oscillator.

[0034] The first radio frequency switch, the second radio frequency switch, the third radio frequency switch and the fourth radio frequency switch are all single-pole triple-throw switches.

[0035] The first radio frequency switch is configured to connect the first feeding structure with one of the first feeding point of the first oscillator and the third feeding point of the second oscillator, or to float the first feeding structure.

[0036] The second radio frequency switch is configured to connect the second feeding structure with one of the second feeding point of the first oscillator and the fourth feeding point of the second oscillator, or to float the second feeding structure.

[0037] The third radio frequency switch is configured to connect the third feeding structure with one of the first feeding point of the first oscillator and the third feeding point of the second oscillator, or to float the third feeding structure.

[0038] The fourth radio frequency switch is configured to connect the fourth feeding structure with one of the second feeding point of the first oscillator and the fourth feeding point of the second oscillator, or to float the fourth feeding structure.

[0039] The antenna array further comprises a phase adjustment structure, which is arranged at least one of the following positions:

[0040] Between the first feeding structure and the first feeding point connected thereto;

[0041] Between the first feeding structure and the third feeding point connected thereto;

[0042] Between the second feeding structure and the second feeding point connected thereto;

[0043] Between the second feeding structure and the fourth feeding point connected thereto;

[0044] Between the third feeding structure and the first feeding point connected thereto;

[0045] Between the third feeding structure and the third feeding point connected thereto;

[0046] Between the fourth feeding structure and the second feeding point connected thereto;

[0047] Between the fourth feeding structure and the fourth feeding point connected thereto.

[0048] The phase adjustment structure comprises a phase shifter.

[0049] The first feeding structure, the second feeding structure, the third feeding structure and the fourth feeding structure are all power dividers.

[0050] The first dipole is a cross-polarized dipole; and / or the second dipole is a cross-polarized dipole.

[0051] The first dipole and the second dipole are both bowl dipoles or cross-dipoles.

[0052] The antenna array further comprises a control module configured to control the switching states of the first radio frequency switch, the second radio frequency switch, the third radio frequency switch and the fourth radio frequency switch in response to a base station demand.

[0053] The present disclosure provides a communication device comprising the antenna array described above. BRIEF DESCRIPTION OF DRAWINGS

[0054] Fig. 1 is a schematic diagram of an exemplary antenna array.

[0055] Fig. 2 is a schematic diagram of a feeding structure of the antenna array.

[0056] Fig. 3 is a horizontal plane far field radiation pattern of the antenna array using the feeding structure shown in Fig. 2.

[0057] Fig. 4 is a vertical plane far field radiation pattern of the antenna array using the feeding structure shown in Fig. 2.

[0058] Fig. 5 is a schematic diagram of a first exemplary antenna array.

[0059] Fig. 6 is a schematic diagram of a feeding structure of the first exemplary antenna array.

[0060] Fig. 7 is a horizontal plane far field radiation pattern of the first exemplary antenna array.

[0061] Fig. 8 is a vertical plane far field radiation pattern of the first exemplary antenna array.

[0062] Fig. 9 is a schematic diagram of a second exemplary antenna array.

[0063] Fig. 10 is a schematic diagram of a feeding structure of the second exemplary antenna array.

[0064] Fig. 11 is a schematic diagram of a third exemplary antenna array.

[0065] Fig. 12 is a schematic diagram of a feeding structure of the third exemplary antenna array.

[0066] Fig. 13 is a schematic diagram of a fourth exemplary antenna array.

[0067] Fig. 14 is a schematic diagram of a feeding structure of the fourth exemplary antenna array.

[0068] Fig. 15 is a schematic diagram of a fifth exemplary antenna array.

[0069] Fig. 16 is a schematic diagram of a feeding structure of the fifth exemplary antenna array.

[0070] Fig. 17 is a horizontal plane far-field radiation pattern of the fifth exemplary antenna array.

[0071] Fig. 18 is a vertical plane far-field radiation pattern of the fifth exemplary antenna array.

[0072] Fig. 19 is a schematic diagram of a sixth exemplary antenna array.

[0073] Fig. 20 is a schematic diagram of a feeding structure of the second exemplary antenna array.

[0074] Fig. 21 is a schematic diagram of a seventh exemplary antenna array.

[0075] Fig. 22 is a schematic diagram of a feeding structure of the seventh exemplary antenna array.

[0076] Fig. 23 is a schematic diagram of an eighth exemplary antenna array.

[0077] Fig. 24 is a schematic diagram of a feeding structure of the eighth exemplary antenna array.

[0078] Fig. 25 is a horizontal plane far-field radiation pattern of the eighth exemplary antenna array.

[0079] Fig. 26 is a vertical plane far-field radiation pattern of the eighth exemplary antenna array.

[0080] Fig. 27 is a schematic diagram of a ninth exemplary antenna array.

[0081] Fig. 28 is a schematic diagram of a feeding structure of the ninth exemplary antenna array.

[0082] Fig. 29 is a schematic diagram of a tenth exemplary antenna array.

[0083] Fig. 30 is a schematic diagram of a feeding structure of the tenth exemplary antenna array.

[0084] Fig. 31 is a horizontal plane far-field radiation pattern of the tenth exemplary antenna array.

[0085] Fig. 32 is a vertical plane far-field radiation pattern of the tenth exemplary antenna array.

[0086] Fig. 33 is a schematic diagram of an eleventh exemplary antenna array.

[0087] Fig. 34 is a schematic diagram of a feeding structure of the eleventh exemplary antenna array.

[0088] Fig. 35 is a horizontal plane far field radiation pattern of the eleventh exemplary antenna array.

[0089] Fig. 36 is a vertical plane far field radiation pattern of the eleventh exemplary antenna array.

[0090] Fig. 37 is a schematic diagram of a twelfth exemplary antenna array.

[0091] Fig. 38 is a schematic diagram of a feed structure of the twelfth exemplary antenna array.

[0092] Fig. 39 is a horizontal plane far field radiation pattern of the twelfth exemplary antenna array.

[0093] Fig. 40 is a vertical plane far field radiation pattern of the twelfth exemplary antenna array.

[0094] Fig. 41 is a schematic diagram of a thirteenth exemplary antenna array.

[0095] Fig. 42 is a schematic diagram of a feed structure of the thirteenth exemplary antenna array.

[0096] Fig. 43 is a horizontal plane far field radiation pattern of the thirteenth exemplary antenna array.

[0097] Fig. 44 is a vertical plane far field radiation pattern of the thirteenth exemplary antenna array.

[0098] Fig. 45 is a schematic diagram of a fourteenth exemplary antenna array.

[0099] Fig. 46 is a schematic diagram of a feed structure of the fourteenth exemplary antenna array.

[0100] Fig. 47 is a horizontal plane far field radiation pattern of the fourteenth exemplary antenna array.

[0101] Fig. 48 is a vertical plane far field radiation pattern of the fourteenth exemplary antenna array.

[0102] Fig. 49 is a schematic diagram of a fifteenth exemplary antenna array.

[0103] Fig. 50 is a schematic diagram of a feed structure of the fifteenth exemplary antenna array.

[0104] Fig. 51 is a horizontal plane far field radiation pattern of the fifteenth exemplary antenna array.

[0105] Fig. 52 is a vertical plane far field radiation pattern of the fifteenth exemplary antenna array. DETAILED DESCRIPTION

[0106] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0107] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the meanings as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first", "second", and similar terms do not imply any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "one", "a", or "the" do not mean quantity limitation, but mean at least one. The terms "include", "comprise", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0108] Figure 1 is an example antenna array, as shown in Figure 1, the antenna array is composed of two sub-arrays, which are respectively referred to as a first sub-array 11 and a second sub-array 12. Among them, the first sub-array 11 and the second sub-array 12 are arranged side by side along a first direction, the first sub-array 11 includes a plurality of first dipoles arranged side by side along a second direction, and the second sub-array 12 includes a plurality of second dipoles arranged side by side along the second direction. The number of first dipoles and second dipoles is the same, and they are arranged one by one. In Figure 1, only the number of first dipoles and the number of second dipoles are taken as an example of 7, and 7 first dipoles are respectively represented by A1-A7, and 7 second dipoles are respectively represented by B1-B7. The first dipole and the second dipole are cross-polarized dipoles, which can be low-frequency bowl-shaped dipoles or cross-dipoles.

[0109] The antenna array not only includes the first sub-array 11 and the second sub-array 12, but also includes a first feeding structure 13, a second feeding structure 14, a third feeding structure 23, and a fourth feeding structure 24. The feeding directions of the first feeding structure 13 and the second feeding structure 14 are different, and the same as the feeding direction of the third feeding structure 23, and the feeding direction of the third feeding structure 23 is different from the feeding direction of the fourth feeding structure 24. Taking the example that both the first dipole and the second dipole realize ±45° polarization direction. Among them, the first feeding structure 13 connects the first feeding point connection of each first dipole to feed the first feeding point, so that the first dipole realizes +45° polarization direction, and the second feeding structure 14 connects the second feeding point connection of each first dipole to feed the second feeding point, so that the first dipole realizes -45° polarization direction; the third feeding structure 23 connects the third feeding point connection of each second dipole to feed the third feeding point, so that the second dipole realizes +45° polarization direction, and the fourth feeding structure 24 connects the fourth feeding point connection of each second dipole to feed the fourth feeding point, so that the second dipole realizes -45° polarization direction.

[0110] Fig. 2 is a schematic diagram of a feeding structure of the antenna array; as shown in Fig. 2, the first feeding structure 13, the second feeding structure 14, the third feeding structure 23 and the fourth feeding structure 24 can all adopt a power divider, and each has a first feeding port In1, a second feeding port In2, a third feeding port In3 and a fourth feeding port In4 for receiving a radio frequency signal. The radio frequency signal is fed to the first and second dipoles through the first feeding port In1, the second feeding port In2, the third feeding port In3 and the fourth feeding port In4. It can be seen that the first dipoles A1-A7 in the first subarray 11 are fed by the first feeding structure 13 and the second feeding structure 14, and the second dipoles B1-B7 in the second subarray 12 are fed by the second feeding structure 14 and the second feeding structure 14.

[0111] Fig. 3 is a horizontal plane far-field radiation pattern of the antenna array using the feeding structure shown in Fig. 2; Fig. 4 is a vertical plane far-field radiation pattern of the antenna array using the feeding structure shown in Fig. 2; as shown in Figs. 3 and 4, S3 corresponds to a frequency of 690 MHz, S4 corresponds to a frequency of 0.76 GHz, S1 corresponds to a frequency of 0.85 GHz, and S2 corresponds to a frequency of 0.96 GHz. The horizontal plane far-field radiation of the antenna array has a half-power beam width of about 65°, and the vertical plane far-field radiation has a half-power beam width of about 12°.

[0112] In order to achieve a narrower beam width, the following technical solutions are provided in the embodiments of the present disclosure.

[0113] The antenna array provided by the embodiments of the present disclosure is composed of two sub-arrays, which are referred to as a first sub-array and a second sub-array. The first sub-array and the second sub-array are arranged side by side along a first direction. The first sub-array includes a plurality of first dipoles arranged side by side along a second direction. The second sub-array includes a plurality of second dipoles arranged side by side along the second direction. The number of the first dipoles is the same as that of the second dipoles, and the first dipoles and the second dipoles are arranged one by one in correspondence. The antenna array includes not only the first sub-array and the second sub-array, but also a first feeding structure, a second feeding structure, a third feeding structure, and a fourth feeding structure. The feeding directions of the first feeding structure and the second feeding structure are different from each other and the same as the feeding direction of the third feeding structure. The feeding direction of the third feeding structure is different from the feeding direction of the fourth feeding structure. For example, the first dipoles and the second dipoles both realize ±45° polarization directions. In the first sub-array, the first feeding points of some of the first dipoles are connected to the first feeding structure, and the second feeding points are connected to the second feeding structure. The first feeding points of the other first dipoles are connected to the third feeding structure, and the second feeding points are connected to the fourth feeding structure. In the second sub-array, the third feeding points of some of the second dipoles are connected to the third feeding structure, and the fourth feeding points are connected to the fourth feeding structure. The third feeding points of the other second dipoles are connected to the first feeding structure, and the fourth feeding points are connected to the second feeding structure.

[0114] It should be noted that the first dipoles and the second dipoles in the embodiments of the present disclosure are both dual-polarized dipoles, and the first dipoles and the second dipoles both realize ±45° polarization directions are taken as an example. That is, the line connecting the first feeding point and the center of the first dipole is perpendicular to the line connecting the second feeding point and the center of the second dipole. However, it should be understood that the embodiments of the present disclosure only take the example that the first dipoles and the second dipoles both realize ±45° polarization directions, and if the first dipoles and the second dipoles realize 0° / 90°, etc., they are also within the protection scope of the embodiments of the present disclosure.

[0115] In the embodiments of the present disclosure, some of the first dipoles in the first sub-array are fed by the first feeding structure and the second feeding structure, and the other first dipoles are fed by the second feeding structure and the third feeding structure. Correspondingly, some of the second dipoles in the second sub-array are fed by the third feeding structure and the fourth feeding structure, and the other second dipoles are fed by the first feeding structure and the second feeding structure. In this way, a narrower beam width can be realized, which will be described in detail in combination with the specific examples below.

[0116] In some examples, the number of first resonators in the first subarray and the number of second resonators in the second subarray are the same, and the first resonators and the second resonators are arranged one-to-one correspondingly, and for the first resonator and the second resonator arranged one-to-one correspondingly, one of the two is fed by the first feeding structure and the second feeding structure, and the other is fed by the third feeding structure and the fourth feeding structure. That is, when the first feeding point of the first resonator is connected to the first feeding structure, and the second feeding point is connected to the second feeding structure, the third feeding point of the second resonator is connected to the third feeding structure, and the fourth feeding point is connected to the fourth feeding structure; when the first feeding point of the first resonator is connected to the third feeding structure, and the second feeding point is connected to the fourth feeding structure, the third feeding point of the second resonator is connected to the first feeding structure, and the fourth feeding point is connected to the second feeding structure.

[0117] In some examples, the first feeding structure, the second feeding structure, the third feeding structure and the fourth feeding structure can each include a power divider, wherein the power divider includes a main branch and a plurality of branch branches connected to the main branch, and each branch branch is connected to a corresponding first resonator or second resonator. The main branch is connected to the cable for receiving the radio frequency signal provided by the cable. Among them, in order to facilitate the description, the port of the main branch of the first feeding structure for receiving the radio frequency signal is called the first feeding port, the port of the main branch of the second feeding structure for receiving the radio frequency signal is called the second feeding port, the port of the main branch of the third feeding structure for receiving the radio frequency signal is called the third feeding port, and the port of the main branch of the fourth feeding structure for receiving the radio frequency signal is called the fourth feeding port. The feeding directions of the first feeding port and the third feeding port are the same, and correspond to the first resonator / second resonator connected thereto to realize +45° polarization, and the feeding directions of the second feeding port and the fourth feeding port are the same, and correspond to the first resonator / second resonator connected thereto to realize -45° polarization.

[0118] In some examples, the phase adjustment structure is configured in at least one of the following positions. Between the first feeding structure and the first feeding point of the first resonator connected thereto; between the first feeding structure and the third feeding point of the second resonator connected thereto; between the second feeding structure and the second feeding point of the first resonator connected thereto; between the second feeding structure and the fourth feeding point of the second resonator connected thereto; between the third feeding structure and the first feeding point of the first resonator connected thereto; between the third feeding structure and the third feeding point of the second resonator connected thereto; between the fourth feeding structure and the second feeding point of the first resonator connected thereto; between the fourth feeding structure and the fourth feeding point of the second resonator connected thereto. By the arrangement of the phase adjustment structure, the phase of the radio frequency signal transmitted to the first resonator / second resonator can be adjusted.

[0119] Further, the phase adjustment structure can specifically adopt a phase shifter, for example, the phase shifter can be a liquid crystal phase shifter. An exemplary liquid crystal phase shifter can include oppositely arranged first and second substrates, and a liquid crystal layer arranged between the first and second substrates. Wherein a first electrode can be arranged on the side of the first substrate close to the second substrate, and a second electrode can be arranged on the side of the second substrate close to the first substrate. By loading a first bias voltage to the first electrode and a second bias voltage to the second electrode, an electric field is generated between the first electrode and the second electrode to make the liquid crystal molecules of the liquid crystal layer flip, thereby changing the dielectric constant, and further realizing phase adjustment of the transmitted radio frequency signal.

[0120] Next, the architecture of the antenna array in the embodiment of the present disclosure for realizing several narrow beam widths is described in combination with specific examples.

[0121] The first example: referring to FIG. 5 and FIG. 6, the antenna array includes two sub-arrays and four feeding structures, the two sub-arrays are represented by a first sub-array 11 and a second sub-array 12 respectively, and the four feeding structures are represented by a first feeding structure 13, a second feeding structure 14, a third feeding structure 23 and a fourth feeding structure 24 respectively. The first sub-array 11 and the second sub-array 12 are arranged side by side along a first direction, and both the first sub-array 11 and the second sub-array 12 include a plurality of dipoles arranged side by side along a second direction, the dipoles in the first sub-array 11 are referred to as first dipoles, and the dipoles in the second sub-array 12 are referred to as second dipoles.

[0122] Wherein, the number of first dipoles in the first sub-array 11 and the number of second dipoles in the second sub-array 12 are both 7, the 7 first dipoles are represented by A1-A7 from top to bottom, and the 7 second dipoles are represented by B1-B7 from top to bottom. Both the first dipoles and the second dipoles are cross-polarized dipoles, which can be low-frequency bowl-shaped dipoles or cross-dipoles. The first feeding port In1 of the first feeding structure 13 corresponds to a +45° polarized direction feeding channel, the second feeding port In2 of the second feeding structure 14 corresponds to a +45° polarized direction feeding channel, the third feeding port In3 of the third feeding structure 23 corresponds to a -45° polarized direction feeding channel, and the fourth feeding port In4 of the fourth feeding structure 24 corresponds to a -45° polarized direction feeding channel. The first feeding port In1, the second feeding port In2, the third feeding port In3 and the fourth feeding port In4 directly transmit the received radio frequency signal to the corresponding dipoles, which can be transmitted to the corresponding dipoles through a phase shifter.

[0123] Continuing to refer to FIG. 5 and FIG. 6, the first and second dipoles of the same color are fed by the same feed structure, that is, the first dipoles A2, A4, A6 in the first subarray 11 and the second dipoles B1, B3, B5, B7 in the second subarray 12 are fed by the first feed port In1 to achieve a polarization direction of +45°, and are fed by the second feed port In2 to achieve a polarization direction of -45°. The first dipoles A1, A3, A5, A7 in the first subarray 11 and the second dipoles B2, B4, B6 in the second subarray 12 are fed by the third feed port In3 to achieve a polarization direction of +45°, and are fed by the fourth feed port In4 to achieve a polarization direction of -45°.

[0124] FIG. 7 is a horizontal plane far-field radiation pattern of the antenna array of the first example; FIG. 8 is a vertical plane far-field radiation pattern of the antenna array of the first example; as shown in FIG. 7 and FIG. 8, S3 corresponds to a frequency of 690 MHz, S4 corresponds to a frequency of 0.76 GHz, S1 corresponds to a frequency of 0.85 GHz, and S2 corresponds to a frequency of 0.96 GHz. The horizontal plane far-field radiation of the cross-fed four-port narrow-beam base station antenna array has a half-power beam width of about 33°, and the vertical plane far-field radiation still has a half-power beam width of about 12°.

[0125] The second example: FIG. 9 is a schematic diagram of the antenna array of the second example; FIG. 10 is a schematic diagram of the feed structure of the antenna array of the second example; as shown in FIG. 9 and FIG. 10, the first subarray 11 and the second subarray 12 in the antenna array in this example are the same as the first example, and the difference is only that the dipoles connected by the first feed structure 13, the second feed structure 14, the third feed structure 23 and the fourth feed structure 24 are different. Specifically, the first dipoles A3, A5, A6 in the first subarray 11 and the second dipoles B1, B2, B4, B7 in the second subarray 12 are fed by the first feed port In1 to achieve a polarization direction of +45°, and are fed by the second feed port In2 to achieve a polarization direction of -45°. The first dipoles A1, A2, A4, A7 in the first subarray 11 and the second dipoles B3, B5, B6 in the second subarray 12 are fed by the third feed port In3 to achieve a polarization direction of +45°, and are fed by the fourth feed port In4 to achieve a polarization direction of -45°.

[0126] For this architecture, the horizontal plane far-field radiation of the cross-fed four-port narrow-beam base station antenna array has a half-power beam width of about 33°, and the vertical plane far-field radiation still has a half-power beam width of about 12°.

[0127] Third example: Fig. 11 is a schematic diagram of the antenna array of the third example; Fig. 12 is a schematic diagram of the feeding structure of the antenna array of the third example; as shown in Figs. 11 and 12, the first subarray 11 and the second subarray 12 in the antenna array in this example are the same as those in the first example, and the difference is only that the first feed structure 13, the second feed structure 14, the third feed structure 23 and the fourth feed structure 24 are connected to different dipoles. Specifically, the first dipoles A4, A6 in the first subarray 11 and the second dipoles B1, B2, B3, B5, B7 in the second subarray 12 are all fed by the first feed port In1 to achieve a polarization direction of +45°, and are fed by the second feed port In2 to achieve a polarization direction of -45°. The first dipoles A1, A2, A3, A5, A7 in the first subarray 11 and the second dipoles B4, B6 in the second subarray 12 are all fed by the third feed port In3 to achieve a polarization direction of +45°, and are fed by the fourth feed port In4 to achieve a polarization direction of -45°.

[0128] For this kind of architecture, the half-power beam width of the horizontal plane far-field radiation of the cross-fed four-port narrow-beam base station antenna array is about 33°, and the half-power beam width of the vertical plane far-field radiation is still about 12°.

[0129] Fourth example: Fig. 13 is a schematic diagram of the antenna array of the fourth example; Fig. 14 is a schematic diagram of the feeding structure of the antenna array of the fourth example; as shown in Figs. 13 and 14, the first subarray 11 and the second subarray 12 in the antenna array in this example are the same as those in the first example, and the difference is only that the first feed structure 13, the second feed structure 14, the third feed structure 23 and the fourth feed structure 24 are connected to different dipoles. Specifically, the first dipoles A1, A2, A3, A4 in the first subarray 11 and the second dipoles B5, B6, B7 in the second subarray 12 are all fed by the first feed port In1 to achieve a polarization direction of +45°, and are fed by the second feed port In2 to achieve a polarization direction of -45°. The first dipoles A5, A6, A7 in the first subarray 11 and the second dipoles B1, B2, B3, B4 in the second subarray 12 are all fed by the third feed port In3 to achieve a polarization direction of +45°, and are fed by the fourth feed port In4 to achieve a polarization direction of -45°.

[0130] For this kind of architecture, the half-power beam width of the horizontal plane far-field radiation of the cross-fed four-port narrow-beam base station antenna array is about 33°, and the half-power beam width of the vertical plane far-field radiation is still about 12°.

[0131] The fifth example: Fig. 15 is a schematic diagram of the antenna array of the fifth example; Fig. 16 is a schematic diagram of the feed structure of the antenna array of the fifth example; as shown in Figs. 15 and 16, the antenna in this example is different from the base station antenna array in the first to fourth examples, which is a large venue antenna array, which also includes a first subarray 11 and a second subarray 12, except that the number of oscillators in the first subarray 11 and the second subarray 12 is four, that is, the first subarray 11 includes four first oscillators, and the second subarray 12 includes four second oscillators, the four first oscillators are denoted as A1-A4 from top to bottom, and the four second oscillators are denoted as B1-B4 from top to bottom.

[0132] The first oscillator and the second oscillator are both cross-polarized oscillators, which can be low-frequency bowl-type oscillators or cross-dipoles. The first feed port In1 of the first feed structure 13 corresponds to a feed channel of +45° polarization direction, the second feed port In2 of the second feed structure 14 corresponds to a feed channel of +45° polarization direction, the third feed port In3 of the third feed structure 23 corresponds to a feed channel of -45° polarization direction, and the fourth feed port In4 of the fourth feed structure 24 corresponds to a feed channel of -45° polarization direction. The first feed port In1, the second feed port In2, the third feed port In3 and the fourth feed port In4 directly transmit the received radio frequency signals to the corresponding oscillators, which can be transmitted to the corresponding oscillators through a phase shifter.

[0133] Continuing to refer to Figs. 15 and 16, the first oscillators and the second oscillators of the same color are fed by the same feed structure, that is, the first oscillators A2, A4 in the first subarray 11 and the second oscillators B1, B3 in the second subarray 12 are all fed by the first feed port In1 to achieve a polarization direction of +45°, and are fed by the second feed port In2 to achieve a polarization direction of -45°. The first oscillators A1, A3 in the first subarray 11 and the second oscillators B2, B4 in the second subarray 12 are all fed by the third feed port In3 to achieve a polarization direction of +45°, and are fed by the fourth feed port In4 to achieve a polarization direction of -45°.

[0134] Fig. 17 is a horizontal plane far-field radiation pattern of the antenna array of the fifth example; Fig. 18 is a vertical plane far-field radiation pattern of the antenna array of the fifth example; as shown in Figs. 17 and 18, S3 corresponds to a frequency of 690MHz, S4 corresponds to a frequency of 0.76GHz, S1 corresponds to a frequency of 0.85GHz, and S2 corresponds to a frequency of 0.96GHz. The horizontal plane far-field radiation of the cross-fed four-port narrow-beam large venue antenna array has a half-power beam width of about 33°, and the vertical plane far-field radiation has a half-power beam width of about 20°.

[0135] Sixth example: Fig. 19 is a schematic diagram of the antenna array of the sixth example; Fig. 20 is a schematic diagram of the feeding structure of the antenna array of the second example; as shown in Figs. 19 and 20, the first subarray 11 and the second subarray 12 in the antenna array in this example are the same as in the fifth example, and the difference is only that the first feeding structure 13, the second feeding structure 14, the third feeding structure 23 and the fourth feeding structure 24 are connected to different dipoles. Specifically, the first dipoles A1, A4 in the first subarray 11 and the second dipoles B2, B3 in the second subarray 12 are all fed by the first feeding port In1 to achieve a polarization direction of +45°, and are fed by the second feeding port In2 to achieve a polarization direction of -45°. The first dipoles A2, A3 in the first subarray 11 and the second dipoles B1, B4 in the second subarray 12 are all fed by the third feeding port In3 to achieve a polarization direction of +45°, and are fed by the fourth feeding port In4 to achieve a polarization direction of -45°.

[0136] For this kind of architecture, the half-power beamwidth of the horizontal plane far-field radiation of the cross-fed four-port narrow-beam large venue antenna array is about 33°, and the half-power beamwidth of the vertical plane far-field radiation is still about 20°.

[0137] Seventh example: Fig. 21 is a schematic diagram of the antenna array of the seventh example; Fig. 22 is a schematic diagram of the feeding structure of the antenna array of the seventh example; as shown in Figs. 21 and 22, the first subarray 11 and the second subarray 12 in the antenna array in this example are the same as in the fifth example, and the difference is only that the first feeding structure 13, the second feeding structure 14, the third feeding structure 23 and the fourth feeding structure 24 are connected to different dipoles. Specifically, the first dipoles A3, A4 in the first subarray 11 and the second dipoles B1, B2 in the second subarray 12 are all fed by the first feeding port In1 to achieve a polarization direction of +45°, and are fed by the second feeding port In2 to achieve a polarization direction of -45°. The first dipoles A1, A2 in the first subarray 11 and the second dipoles B3, B4 in the second subarray 12 are all fed by the third feeding port In3 to achieve a polarization direction of +45°, and are fed by the fourth feeding port In4 to achieve a polarization direction of -45°.

[0138] For this kind of architecture, the half-power beamwidth of the horizontal plane far-field radiation of the cross-fed four-port narrow-beam large venue antenna array is about 33°, and the half-power beamwidth of the vertical plane far-field radiation is still about 20°.

[0139] The eighth example: Fig. 23 is a schematic diagram of the antenna array of the eighth example; Fig. 24 is a schematic diagram of the feeding structure of the antenna array of the eighth example; as shown in Figs. 23 and 24, the first subarray 11 and the second subarray 12 in the antenna array in this example are the same as the eighth example, and the difference is only that the number of oscillators in the first subarray 11 and the second subarray 12 is four, that is, the first subarray 11 includes three first oscillators, and the second subarray 12 includes three second oscillators, the three first oscillators are denoted by A1-A3 from top to bottom, and the three second oscillators are denoted by B1-B3 from top to bottom. The oscillators connected by the first feeding structure 13, the second feeding structure 14, the third feeding structure 23 and the fourth feeding structure 24 are different.

[0140] Specifically, the first oscillator A2 in the first subarray 11 and the second oscillators B1 and B3 in the second subarray 12 are fed by the first feeding port In1 to achieve a polarization direction of +45°, and are fed by the second feeding port In2 to achieve a polarization direction of -45°. The first oscillators A1 and A3 in the first subarray 11 and the second oscillator B2 in the second subarray 12 are fed by the third feeding port In3 to achieve a polarization direction of +45°, and are fed by the fourth feeding port In4 to achieve a polarization direction of -45°.

[0141] Fig. 25 is a horizontal plane far-field radiation pattern of the antenna array of the eighth example; Fig. 26 is a vertical plane far-field radiation pattern of the antenna array of the eighth example; as shown in Figs. 25 and 26, S3 corresponds to a frequency of 690MHz, S4 corresponds to a frequency of 0.76GHz, S1 corresponds to a frequency of 0.85GHz, and S2 corresponds to a frequency of 0.96GHz. The half-power beamwidth of the horizontal plane far-field radiation of the cross-fed four-port narrow-beam large venue antenna array is about 33°, and the half-power beamwidth of the vertical plane far-field radiation is about 27°.

[0142] The ninth example: Fig. 27 is a schematic diagram of the antenna array of the ninth example; Fig. 28 is a schematic diagram of the feeding structure of the antenna array of the ninth example; as shown in Figs. 27 and 28, the first subarray 11 and the second subarray 12 in the antenna array in this example are the same as the eighth example, and the difference is only that the oscillators connected by the first feeding structure 13, the second feeding structure 14, the third feeding structure 23 and the fourth feeding structure 24 are different.

[0143] Specifically, the first vibrator A2, A3 in the first subarray 11, the second vibrator B1 in the second subarray 12 are fed by the first feed port In1 to realize the polarization direction of +45°, and are fed by the second feed port In2 to realize the polarization direction of -45°. The first vibrator A1 in the first subarray 11, the second vibrator B2, B3 in the second subarray 12 are fed by the third feed port In3 to realize the polarization direction of +45°, and are fed by the fourth feed port In4 to realize the polarization direction of -45°.

[0144] For this kind of architecture, the half-power beam width of the horizontal plane far-field radiation of the cross-fed four-port narrow-beam large venue antenna array is about 33°, and the half-power beam width of the vertical plane far-field radiation is still about 27°.

[0145] The embodiment of the present disclosure also provides a beam-adjustable antenna array, which is same as the above example and also includes two sub-arrays and four feeding structures, and the two sub-arrays are also called a first sub-array 11 and a second sub-array 12, and the four feeding structures are also called a first feeding structure 13, a second feeding structure 14, a third feeding structure 23 and a fourth feeding structure 24. Different from the above example, a first radio frequency switch 31 is arranged between the first feeding structure 13 and the first feed point of the first oscillator and the third feed point of the second oscillator, a second radio frequency switch 32 is arranged between the second feeding structure 14 and the second feed point of the first oscillator and the fourth feed point of the second oscillator, a third radio frequency switch 41 is arranged between the third feeding structure 23 and the first feed point of the first oscillator and the third feed point of the second oscillator, and a fourth radio frequency switch 42 is arranged between the fourth feeding structure 24 and the second feed point of the first oscillator and the fourth feed point of the second oscillator. That is, the switching state of the first radio frequency switch 31 can be controlled to control whether the first feeding structure 13 feeds the first feed point of the first oscillator or feeds the third feed of the second oscillator, and when the first radio frequency switch 31 selects the first feeding structure 13 and the first feed point of the first oscillator, the second radio frequency switch 32 selects the second feeding structure 14 and the second feed point of the first oscillator; when the first radio frequency switch 31 selects the first feeding structure 13 and the third feed point of the second oscillator, the second radio frequency switch 32 selects the second feeding structure 14 and the fourth feed point of the second oscillator. Similarly, the switching state of the third radio frequency switch 41 can be controlled to control whether the third feeding structure 23 feeds the first feed point of the first oscillator or feeds the third feed of the second oscillator, and when the third radio frequency switch 41 selects the third feeding structure 23 and the first feed point of the first oscillator, the fourth radio frequency switch 42 selects the fourth feeding structure 24 and the second feed point of the first oscillator; when the third radio frequency switch 41 selects the third feeding structure 23 and the third feed point of the second oscillator, the fourth radio frequency switch 42 selects the fourth feeding structure 24 and the fourth feed point of the second oscillator. In this way, the switching states of the first radio frequency switch 31, the second radio frequency switch 32, the third radio frequency switch 41 and the fourth radio frequency switch 42 can be controlled according to the requirement of the beam width.

[0146] For the remaining structures in the antenna array, for example, the type of the feeding structure and the phase adjustment structure, the same structures in the above example can be adopted, and thus the details are not described herein.

[0147] Next, the beam-adjustable antenna array in the embodiment of the present disclosure is described in combination with several specific examples.

[0148] The tenth example: Fig. 29 is a schematic diagram of the antenna array of the tenth example; Fig. 30 is a schematic diagram of the feeding structure of the antenna array of the tenth example; as shown in Figs. 29 and 30, the antenna array includes two sub-arrays and four feeding structures, the two sub-arrays are represented by a first sub-array 11 and a second sub-array 12 respectively, and the four feeding structures are represented by a first feeding structure 13, a second feeding structure 14, a third feeding structure 23 and a fourth feeding structure 24 respectively. The first sub-array 11 and the second sub-array 12 are arranged side by side along a first direction, and both the first sub-array 11 and the second sub-array 12 include a plurality of dipoles arranged side by side along a second direction, the dipoles in the first sub-array 11 are referred to as first dipoles, and the dipoles in the second sub-array 12 are referred to as second dipoles.

[0149] Among them, the number of first dipoles in the first sub-array 11 and the number of second dipoles in the second sub-array 12 are both 7, and the 7 first dipoles are represented by A1-A7 from top to bottom, and the 7 second dipoles are represented by B1-B7 from top to bottom. The first dipoles and the second dipoles are cross-polarized dipoles, which can be low-frequency bowl-shaped dipoles or cross-dipoles. The first feeding port In1 of the first feeding structure 13 corresponds to a +45° polarized direction feeding channel, the second feeding port In2 of the second feeding structure 14 corresponds to a +45° polarized direction feeding channel, the third feeding port In3 of the third feeding structure 23 corresponds to a -45° polarized direction feeding channel, and the fourth feeding port In4 of the fourth feeding structure 24 corresponds to a -45° polarized direction feeding channel. The first feeding port In1, the second feeding port In2, the third feeding port In3 and the fourth feeding port In4 directly transmit the received radio frequency signals to the corresponding dipoles, which can be transmitted to the corresponding dipoles through a phase shifter.

[0150] A first radio frequency switch 31 is arranged between the first feeding structure 13 and the first feed point of the first dipole, and the third feed point of the second dipole; a second radio frequency switch 32 is arranged between the second feeding structure 14 and the second feed point of the first dipole, and the fourth feed point of the second dipole; a third radio frequency switch 41 is arranged between the third feeding structure 23 and the first feed point of the first dipole, and the third feed point of the second dipole; and a fourth radio frequency switch 42 is arranged between the fourth feeding structure 24 and the second feed point of the first dipole, and the fourth feed point of the second dipole. The first radio frequency switch 31, the second radio frequency switch 32, the third radio frequency switch 41 and the fourth radio frequency switch 42 are all single-pole double-throw switches, for example: the first radio frequency switch 31, the second radio frequency switch 32, the third radio frequency switch 41 and the fourth radio frequency switch 42 adopt MEMS (Micro Electro Mechanical System) switches.

[0151] The control unit in the antenna array controls the seven first radio frequency switches 31 to select the first feed point of the first element A1-A7 and the first feed structure 13, i.e. the first feed port In1 feeds the first element A1-A7, to realize the +45° direction; correspondingly, the seven second radio frequency switches 32 select the second feed point of the first element A1-A7 and the second feed structure 14, i.e. the second feed port In2 feeds the first element A1-A7, to realize the -45° direction. Similarly, the control unit controls the seven third radio frequency switches 41 to select the third feed point of the second element B1-B7 and the third feed structure 23, i.e. the third feed port In3 feeds the second element B1-B7, to realize the +45° direction; correspondingly, the seven fourth radio frequency switches 42 select the fourth feed point of the second element B1-B7 and the fourth feed structure 24, i.e. the fourth feed port In4 feeds the second element A1-A7, to realize the -45° direction.

[0152] Fig. 31 is a horizontal plane far field radiation pattern of the tenth example of the antenna array; Fig. 32 is a vertical plane far field radiation pattern of the tenth example of the antenna array; as shown in Figs. 31 and 32, S3 corresponds to a frequency of 690 MHz, S4 corresponds to a frequency of 0.76 GHz, S1 corresponds to a frequency of 0.85 GHz, and S2 corresponds to a frequency of 0.96 GHz. The horizontal plane far field radiation of the cross-fed four-port antenna array has a half-power beam width of about 65°, the vertical plane far field radiation has a half-power beam width of about 12°, and the beam downtilt angle is 0°.

[0153] Eleventh example: Fig. 33 is a schematic diagram of the eleventh example of the antenna array; Fig. 34 is a schematic diagram of the feed structure of the eleventh example of the antenna array; as shown in Figs. 33 and 34, the first subarray 11 and the second subarray 12 in the antenna array in this example are the same as the tenth example, and the only difference is that the switch states of the first radio frequency switch 31, the second radio frequency switch 32, the third radio frequency switch 41, and the fourth radio frequency switch 42 are different.

[0154] Specifically, in addition to the first radio frequency switch 31 and the second radio frequency switch 32 corresponding to the first vibrator A6 and the second vibrator B6, the first feed structure 13 and the second feed structure 14 are connected to the second vibrator B6 in a gating manner, the remaining first vibrators A1, A2, A3, A4, A5, A7 in the first subarray 11 are fed by the first feed port In1 of the first feed structure 13 and the second feed port In2 of the second feed structure 14. That is, the first vibrators A1, A2, A3, A4, A5, A7 in the first subarray 11 and the second vibrator B6 in the second subarray 12 are fed by the first feed port In1 to realize a polarization direction of +45°, and are fed by the second feed port In2 to realize a polarization direction of -45°. The first vibrator A6 in the first subarray 11 and the second vibrators B1, B2, B3, B4, B5, B7 in the second subarray 12 are fed by the third feed port In3 to realize a polarization direction of +45°, and are fed by the fourth feed port In4 to realize a polarization direction of -45°.

[0155] Fig. 35 is a horizontal plane far field radiation pattern of the antenna array of the eleventh example; Fig. 36 is a vertical plane far field radiation pattern of the antenna array of the eleventh example; as shown in Figs. 35 and 36, S3 corresponds to a frequency of 690 MHz, S4 corresponds to a frequency of 0.76 GHz, S1 corresponds to a frequency of 0.85 GHz, and S2 corresponds to a frequency of 0.96 GHz. The horizontal plane far field radiation of the cross-fed four-port antenna array has a half-power beam width of about 48°, and the vertical plane far field radiation has a half-power beam width of about 12°, and the beam tilt angle is 7°.

[0156] Twelfth example: Fig. 37 is a schematic diagram of the antenna array of the twelfth example; Fig. 38 is a schematic diagram of the feed structure of the antenna array of the twelfth example; as shown in Figs. 37 and 38, the first subarray 11 and the second subarray 12 in the antenna array in this example are the same as the eleventh example, and the difference is only that the switch states of the first radio frequency switch 31, the second radio frequency switch 32, the third radio frequency switch 41 and the fourth radio frequency switch 42 are different.

[0157] Specifically, in addition to the first radio frequency switch 31 and the second radio frequency switch 32 corresponding to the first vibrator A2, A6 and the second vibrator B2, B6, the first feed structure 13 and the second feed structure 14 are connected to the second vibrator B2, B6 in a gating manner, the remaining first vibrators A1, A3, A4, A5, A7 in the first subarray 11 are fed by the first feed port In1 of the first feed structure 13 and the second feed port In2 of the second feed structure 14. That is, the first vibrators A1, A3, A4, A5, A7 in the first subarray 11 and the second vibrators B2, B6 in the second subarray 12 are fed by the first feed port In1 to realize a polarization direction of +45°, and are fed by the second feed port In2 to realize a polarization direction of -45°. The first vibrators A2, A6 in the first subarray 11 and the second vibrators B1, B3, B4, B5, B7 in the second subarray 12 are fed by the third feed port In3 to realize a polarization direction of +45°, and are fed by the fourth feed port In4 to realize a polarization direction of -45°.

[0158] Fig. 39 is a horizontal plane far field radiation pattern of the twelfth example of the antenna array; Fig. 40 is a vertical plane far field radiation pattern of the twelfth example of the antenna array; as shown in Figs. 39 and 40, S3 corresponds to a frequency of 690 MHz, S4 corresponds to a frequency of 0.76 GHz, S1 corresponds to a frequency of 0.85 GHz, and S2 corresponds to a frequency of 0.96 GHz. The horizontal plane far field radiation of the cross-fed four-port antenna array has a half-power beam width of about 38°, and the vertical plane far field radiation has a half-power beam width of about 12°, and the beam downtilt angle is 14°.

[0159] Thirteenth example: Fig. 41 is a schematic diagram of the thirteenth example of the antenna array; Fig. 42 is a schematic diagram of the feed structure of the thirteenth example of the antenna array; as shown in Figs. 41 and 42, the first subarray 11 and the second subarray 12 in the antenna array in this example are the same as the eleventh example, and the difference is only that the switch states of the first radio frequency switch 31, the second radio frequency switch 32, the third radio frequency switch 41 and the fourth radio frequency switch 42 are different.

[0160] Specifically, the first RF switch 31 and the second RF switch 32 of the first element A2, A4, A6 and the second element B2, B4, B6 select and connect the first feeding structure 13 and the second feeding structure 14 to the second element B2, B4, B6. The remaining first elements A1, A3, A5, A7 in the first subarray 11 are fed by the first feeding port In1 of the first feeding structure 13 and the second feeding port In2 of the second feeding structure 14. That is, the first elements A1, A3, A5, A7 in the first subarray 11 and the second elements B2, B4, B6 in the second subarray 12 are fed by the first feeding port In1 to realize a polarization direction of +45° and fed by the second feeding port In2 to realize a polarization direction of -45°. The first elements A2, A4, A6 in the first subarray 11 and the second elements B1, B3, B5, B7 in the second subarray 12 are fed by the third feeding port In3 to realize a polarization direction of +45° and fed by the fourth feeding port In4 to realize a polarization direction of -45°.

[0161] Fig. 43 is a horizontal plane far field radiation pattern of the thirteenth example of the antenna array; Fig. 44 is a vertical plane far field radiation pattern of the thirteenth example of the antenna array; as shown in Figs. 43 and 44, S3 corresponds to a frequency of 690 MHz, S4 corresponds to a frequency of 0.76 GHz, S1 corresponds to a frequency of 0.85 GHz, and S2 corresponds to a frequency of 0.96 GHz. The horizontal plane far field radiation of the cross-fed four-port antenna array has a half-power beam width of about 33°, and the vertical plane far field radiation has a half-power beam width of about 12°, and the beam downtilt angle is 0°.

[0162] The fourteenth example: Fig. 45 is a schematic diagram of the antenna array of the fourteenth example; Fig. 46 is a schematic diagram of the feed structure of the antenna array of the fourteenth example; this example is substantially the same as the tenth to thirteenth examples described above, the only difference being that the first radio frequency switch 31, the second radio frequency switch 32, the third radio frequency switch 41 and the fourth radio frequency switch 42 in this example are all single-pole triple-throw switches, at this time, the first radio frequency switch 31 can not only select the first feed point of the first oscillator or the third feed point of the second oscillator of the first feed structure 13, but also can disconnect the first feed structure 13 from the two to select floating, that is, neither feed the first oscillator nor feed the second oscillator. Similarly, the second radio frequency switch 32 can not only select the second feed point of the first oscillator or the fourth feed point of the second oscillator of the second feed structure 14, but also can disconnect the second feed structure 14 from the two to select floating, that is, neither feed the first oscillator nor feed the second oscillator. The third radio frequency switch 41 can not only select the first feed point of the first oscillator or the third feed point of the second oscillator of the third feed structure 23, but also can disconnect the third feed structure 23 from the two to select floating, that is, neither feed the first oscillator nor feed the second oscillator. The fourth radio frequency switch 42 can not only select the second feed point of the first oscillator or the fourth feed point of the second oscillator of the fourth feed structure 24, but also can disconnect the fourth feed structure 24 from the two to select floating, that is, neither feed the first oscillator nor feed the second oscillator.

[0163] Continuing to refer to Figs. 45 and 46, through the control of the control unit on each of the first radio frequency switch 31, the second radio frequency switch 32, the third radio frequency switch 41 and the fourth radio frequency switch 42, the first oscillator A6, A7 and the second oscillator B6 and B7 have no feed port for feeding. The first oscillators A1-A5 are fed by the first feed port In1 to achieve a polarization direction of +45°, and are fed by the second feed port In2 to achieve a polarization direction of -45°. The second oscillators B1-B5 are fed by the third feed port In3 to achieve a polarization direction of +45°, and are fed by the fourth feed port In4 to achieve a polarization direction of -45°.

[0164] Fig. 47 is a horizontal plane far field radiation pattern of the antenna array of the fourteenth example; Fig. 48 is a vertical plane far field radiation pattern of the antenna array of the fourteenth example; as shown in Figs. 47 and 48, S3 corresponds to a frequency of 690 MHz, S4 corresponds to a frequency of 0.76 GHz, S1 corresponds to a frequency of 0.85 GHz, and S2 corresponds to a frequency of 0.96 GHz. The half-power beam width of the horizontal plane far field radiation of the cross-fed four-port antenna array is about 65°, and the half-power beam width of the vertical plane far field radiation is about 16°, and the beam downtilt angle is 0°.

[0165] Fifteenth example: Fig. 49 is a schematic diagram of the antenna array of the fifteenth example; Fig. 50 is a schematic diagram of the feed structure of the antenna array of the fifteenth example; as shown in Figs. 49 and 50, the antenna array of this example is substantially the same as that of the fourteenth example, the only difference being that the switch states of the first radio frequency switch 31, the second radio frequency switch 32, the third radio frequency switch 41 and the fourth radio frequency switch 42 are different.

[0166] Specifically, through the control of the control unit on the first radio frequency switch 31, the second radio frequency switch 32, the third radio frequency switch 41 and the fourth radio frequency switch 42, the first oscillators A4-A7 and the second oscillators B4-B7 have no feeding port for feeding. The first oscillators A1, A3 and the second oscillators B2 are fed by the first feeding port In1 to realize a polarization direction of +45°, and are fed by the second feeding port In2 to realize a polarization direction of -45°. The first oscillators A2 and the second oscillators B1, B3 are fed by the third feeding port In3 to realize a polarization direction of +45°, and are fed by the fourth feeding port In4 to realize a polarization direction of -45°.

[0167] Fig. 51 is a horizontal plane far-field radiation pattern of the antenna array of the fifteenth example; Fig. 52 is a vertical plane far-field radiation pattern of the antenna array of the fifteenth example; as shown in Figs. 51 and 52, S3 corresponds to a frequency of 690MHz, S4 corresponds to a frequency of 0.76GHz, S1 corresponds to a frequency of 0.85GHz, and S2 corresponds to a frequency of 0.96GHz. The half-power beamwidth of the horizontal plane far-field radiation of the cross-fed four-port antenna array is about 33°, and the half-power beamwidth of the vertical plane far-field radiation is about 27°, and the beam tilt angle is 0°.

[0168] The communication device of the embodiments of the present disclosure can implement the deployment of narrow beams, and can be applied to, for example, signal coverage of sea areas and signal deep coverage of large venues.

[0169] The communication device of the embodiments of the present disclosure can implement the deployment of narrow beams, and can be applied to, for example, signal coverage of sea areas and signal deep coverage of large venues.

[0170] In some examples, the communication device further includes a transceiving unit, a radio frequency transceiver, a signal amplifier, a power amplifier, and a filter unit. The antenna in the communication device can serve as a transmitting antenna or a receiving antenna. The transceiving unit can include a baseband and a receiving end, the baseband provides at least one frequency band of signals, such as 2G signals, 3G signals, 4G signals, 5G signals, etc., and sends the at least one frequency band of signals to the radio frequency transceiver. After the antenna in the communication system receives the signals, the signals can be transmitted to the receiving end in the transceiving unit after being processed by the filter unit, the power amplifier, the signal amplifier, and the radio frequency transceiver. The receiving end can be, for example, a smart gateway, etc.

[0171] Further, the radio frequency transceiver is connected with the transceiving unit, and is used for modulating the signal sent by the transceiving unit, or is used for demodulating the signal received by the antenna and then transmitting the signal to the transceiving unit. Specifically, the radio frequency transceiver can include a transmitting circuit, a receiving circuit, a modulating circuit and a demodulating circuit. After the transmitting circuit receives the multiple types of signals provided by the baseband, the modulating circuit can modulate the multiple types of signals provided by the baseband, and then transmit the signals to the antenna. The receiving circuit of the radio frequency transceiver transmits the signals received by the antenna to the demodulating circuit, and the demodulating circuit demodulates the signals and then transmits the signals to the receiving end.

[0172] Further, the radio frequency transceiver is connected with the signal amplifier and the power amplifier, the signal amplifier and the power amplifier are further connected with the filtering unit, and the filtering unit is connected with at least one antenna. In the process of transmitting the signal by the communication system, the signal amplifier is used for improving the signal-to-noise ratio of the signal output by the radio frequency transceiver, and then transmitting the signal to the filtering unit; the power amplifier is used for amplifying the power of the signal output by the radio frequency transceiver, and then transmitting the signal to the filtering unit; the filtering unit can specifically include a duplexer and a filtering circuit, and the filtering unit combines and filters the signals output by the signal amplifier and the power amplifier, and then transmits the signals to the antenna, and the antenna radiates the signals. In the process of receiving the signal by the communication system, the antenna transmits the received signal to the filtering unit, the filtering unit filters the signal received by the antenna, and then transmits the signal to the signal amplifier and the power amplifier, the signal amplifier increases the gain of the signal received by the antenna, and increases the signal-to-noise ratio of the signal; and the power amplifier amplifies the power of the signal received by the antenna. After the signal received by the antenna is processed by the power amplifier and the signal amplifier, the signal is transmitted to the radio frequency transceiver, and then transmitted to the transceiving unit.

[0173] In some examples, the signal amplifier can include multiple types of signal amplifiers, such as a low noise amplifier, without limitation.

[0174] In some examples, the communication device provided by the embodiment of the present disclosure further includes a power management unit, and the power management unit is connected with the power amplifier and provides a voltage for amplifying the signal for the power amplifier.

[0175] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also regarded as the protection scope of the present application.

Claims

1. An antenna array comprising a first subarray, a second subarray, a first feeding structure, a second feeding structure, a third feeding structure, and a fourth feeding structure; wherein, The first subarray includes multiple first oscillators, and the second subarray includes multiple second oscillators; the first feeding structure and the third feeding structure have the same feeding direction, but different from the feeding direction of the second feeding structure, and the feeding direction of the second feeding structure is the same as the feeding direction of the fourth feeding structure; The first oscillator has a first feed point and a second feed point, and the second oscillator has a third feed point and a fourth feed point; wherein, A portion of the first oscillators have their first feed points connected to the first feed structure and their second feed points connected to the second feed structure. Another portion of the first oscillators have their first feed points connected to the third feed structure and their second feed points connected to the fourth feed structure. A portion of the second oscillators have their third feed point connected to the third feed structure and their fourth feed point connected to the fourth feed structure. Another portion of the second oscillators have their third feed point connected to the first feed structure and their fourth feed point connected to the second feed structure.

2. The antenna array according to claim 1, wherein, The first oscillator and the second oscillator are configured in a one-to-one correspondence. For the corresponding first oscillator and the second oscillator, one of the first feed point of the first oscillator and the third feed point of the second oscillator is connected to the first feed structure, and the other is connected to the third feed structure; one of the second feed point of the second oscillator and the fourth feed point of the second oscillator is connected to the second feed structure, and the other is connected to the fourth feed structure.

3. The antenna array according to claim 1, wherein, It also includes a phase adjustment structure, which is configured in at least one of the following locations: Between the first feeding structure and the corresponding first feeding point; Between the first feeding structure and the corresponding third feeding point; Between the second feed structure and the corresponding second feed point; Between the second feed structure and the corresponding fourth feed point; Between the third feed structure and the first feed point connected thereto; Between the third feed structure and the corresponding third feed point; Between the fourth feed structure and the corresponding second feed point; Between the fourth feed structure and the corresponding fourth feed point.

4. The antenna array according to claim 3, wherein, The phase adjustment structure includes a phase shifter.

5. The antenna array according to claim 1, wherein, The first, second, third, and fourth power supply structures are all power dividers.

6. The antenna array according to any one of claims 1-5, wherein, The first oscillator is a cross-polarized oscillator; and / or, the second oscillator is a cross-polarized oscillator.

7. The antenna array according to claim 6, wherein, The cross-polarized oscillator is either a bowl-shaped oscillator or a cross dipole.

8. An antenna array comprising a first subarray, a second subarray, a first feeding structure, a second feeding structure, a third feeding structure, and a fourth feeding structure; The first subarray includes multiple first oscillators, and the second subarray includes multiple second oscillators; the first oscillators have a first feed point and a second feed point, and the second oscillators have a third feed point and a fourth feed point; the first feeding structure and the third feeding structure have the same feeding direction, but different from the feeding direction of the second feeding structure, and the feeding direction of the second feeding structure is the same as the feeding direction of the fourth feeding structure; wherein... A first radio frequency switch is disposed between the first feeding structure and the first feed point of the first oscillator, and the third feed point of the second oscillator; a second radio frequency switch is disposed between the second feeding structure and the second feed point of the first oscillator, and the fourth feed point of the second oscillator. A third radio frequency switch is disposed between the third feeding structure and the first feed point of the first oscillator and the third feed point of the second oscillator; a fourth radio frequency switch is disposed between the fourth feeding structure and the second feed point of the first oscillator and the fourth feed point of the second oscillator.

9. The antenna array according to claim 8, wherein, The first radio frequency switch, the third radio frequency switch, and the fourth radio frequency switch are all single-pole double-throw switches; The first radio frequency switch is configured to connect the first feeding structure to one of the first feed point of the first oscillator and the third feed point of the second oscillator. The second radio frequency switch is configured to connect the second feed structure to one of the second feed point of the first oscillator and the fourth feed point of the second oscillator; The third radio frequency switch is configured to connect the third feed structure to one of the first feed point of the first oscillator and the third feed point of the second oscillator. The fourth radio frequency switch is configured to connect the fourth feed structure to one of the second feed point of the first oscillator and the fourth feed point of the second oscillator.

10. The antenna array according to claim 8, wherein, The first RF switch, the third RF switch, and the fourth RF switch are all single-pole triple-throw switches; The first radio frequency switch is configured to connect the first feed structure to one of the first feed point of the first oscillator and the third feed point of the second oscillator, or to float the first feed structure. The second radio frequency switch is configured to connect the second feed structure to one of the second feed point of the first oscillator and the fourth feed point of the second oscillator, or to float the second feed structure. The third radio frequency switch is configured to connect the third feed structure to one of the first feed point of the first oscillator and the third feed point of the second oscillator, or to float the third feed structure. The fourth radio frequency switch is configured to connect the fourth feed structure to one of the second feed point of the first oscillator and the fourth feed point of the second oscillator, or to float the fourth feed structure.

11. The antenna array according to claim 8, wherein, It also includes a phase adjustment structure, which is configured in at least one of the following locations: Between the first feeding structure and the corresponding first feeding point; Between the first feeding structure and the corresponding third feeding point; Between the second feed structure and the corresponding second feed point; Between the second feed structure and the corresponding fourth feed point; Between the third feed structure and the first feed point connected thereto; Between the third feed structure and the corresponding third feed point; Between the fourth feed structure and the corresponding second feed point; Between the fourth feed structure and the corresponding fourth feed point.

12. The antenna array according to claim 11, wherein, The phase adjustment structure includes a phase shifter.

13. The antenna array according to claim 8, wherein, The first, second, third, and fourth power supply structures are all power dividers.

14. The antenna array according to any one of claims 8-13, wherein, The first oscillator is a cross-polarized oscillator; and / or, the second oscillator is a cross-polarized oscillator.

15. The antenna array according to claim 14, wherein, Both the first oscillator and the second oscillator are either bowl-shaped oscillators or cross dipoles.

16. The antenna array according to any one of claims 8-13, wherein, It also includes a control module configured to control the switching states of the first radio frequency switch, the second radio frequency switch, the third radio frequency switch, and the fourth radio frequency switch in response to base station requirements.

17. A communication device comprising the antenna array of any one of claims 1-16.

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