Antenna unit, antenna and antenna feeder system

Abstract

The application relates to the field of antennas, in particular to an antenna unit, an antenna and a sky feeder system, wherein the antenna unit comprises a reflecting element and two monopoles as radiators located on the same side of the reflecting element, the horizontal sections of the two monopoles are arranged in a cross manner, and the two monopoles are fed by coupling. Meanwhile, a coupling body is added near the monopole, the coupling body comprises a pair of coupling structures, each coupling structure can be coupled with the horizontal section and the vertical section of one of the monopoles, wherein the coupling structure and the vertical section of the monopole extend in the same direction, and the coupling structure and the horizontal section of the monopole extend in the opposite direction. The antenna unit can avoid the deterioration of the directional diagram of other frequency bands, increase the isolation between systems, and cooperate with the coupling structure and the monopole to reduce the radiation field of the vertical section of the monopole, increase the radiation field of the horizontal section of the monopole, reduce the cross polarization of the monopole, and improve the electrical performance of the multi-frequency array antenna.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of antennas, and in particular to an antenna unit, an antenna and an antenna feeder system. BACKGROUND

[0002] With the development of wireless communication technology, the development of antenna elements as the core components of antennas is favored. As shown in FIG. 1(a), an antenna array is formed by an array of a plurality of antenna units 10, and each antenna unit 10 includes a radiator 11 (for example, high-frequency radiators 11a and low-frequency radiators 11b in FIG. 1(a)) and a reflecting element 12. In a multi-frequency antenna, the antenna units 10 in the antenna array include high-frequency units 10a and low-frequency units 10b that have different operating frequency bands.

[0003] In order to realize the miniaturization of the antenna, in the antenna 1, the high-frequency radiators 11a in the high-frequency units 10a and the low-frequency radiators 11b in the low-frequency units 10b are installed on the same side of the reflecting element 12. As shown in FIG. 1(a) and FIG. 1(b), the number of high-frequency radiators 11a is 8, and they are arrayed in a compact manner in 4 rows and 2 columns on the first surface 12a of the reflecting element 12. The number of low-frequency radiators 11b is 3, and they are arrayed in a compact manner in 3 rows and 1 column on the first surface 12a of the reflecting element 12, and the high-frequency radiators 11a and the low-frequency radiators 11b are arranged in an alternating manner between rows.

[0004] Based on this, the antenna units 10 of different operating frequency bands will interfere with each other when working. For example, the high-frequency units 10a generate common-mode resonance and differential-mode resonance in the operating frequency band of the low-frequency units 10b. On the one hand, the common-mode resonance causes the high-frequency units 10a to form a strong radiation field in the radiation field of the low-frequency units 10b, and the radiation field and the radiation field of the low-frequency units 10b are superimposed on each other, resulting in the deterioration of the directional pattern of the low-frequency units 10b. On the other hand, the differential-mode resonance causes a high receiving energy to exist in the port of the high-frequency units 10a, resulting in poor isolation between the antenna systems. SUMMARY

[0005] The embodiment of the present application provides an antenna unit, an antenna and a system. The antenna unit adopts two horizontal sections of monopole arranged in cross as a radiator, and the two monopoles are coupled to be fed. A coupling body is added near the monopole, the coupling body includes a pair of coupling structures, each coupling structure can be coupled with the horizontal section and the vertical section of one monopole respectively, wherein the coupling structure and the vertical section of the monopole extend in the same direction, and the coupling structure and the horizontal section of the monopole extend in the opposite direction. The antenna unit in the present application can avoid the resonance of common mode and differential mode in the low frequency working frequency band when the high frequency unit and the low frequency unit coexist in the array, thereby avoiding the deterioration of the directivity of the low frequency unit, avoiding the strong receiving energy of the port of the high frequency unit, and increasing the isolation between the systems. In addition, the coupling structure is matched with the monopole to reduce the radiation field of the vertical section of the monopole, increase the radiation field of the horizontal section of the monopole, reduce the cross polarization of the vertical section and the horizontal section of the monopole when the monopole works, and improve the electrical performance of the multi-frequency array antenna.

[0006] The first aspect of the present application provides an antenna unit, specifically comprising a reflecting element, two radiators located on the same side of the reflecting element, and a coupling body coupled with each of the radiators, wherein each of the radiators is coupled to be fed. Each of the radiators comprises a vertical section extending along a vertical direction and a horizontal section extending along a horizontal direction, one end of the vertical section is connected to one end of the horizontal section, and the horizontal sections of the two radiators are arranged in cross, wherein the vertical direction intersects the surface of the reflecting element, and the vertical direction intersects the horizontal direction. The coupling body comprises two coupling structures, each of the coupling structures comprises a horizontal coupling branch and a vertical coupling branch, wherein one end of the horizontal coupling branch is connected to one end of the vertical coupling branch, the vertical coupling branch is coupled with the vertical section and extends in the same direction relative to the vertical section, the horizontal coupling branch is coupled with the horizontal section and extends in the opposite direction relative to the horizontal section, and the vertical coupling branch is electrically connected with the reflecting element.

[0007] The vertical direction intersects the surface of the reflecting element means that the straight line along the vertical direction can intersect the surface of the reflecting element, and the angle between the straight line along the vertical direction and the surface of the reflecting element is not specifically limited in the present application. The vertical direction intersects the horizontal direction means that the straight line along the vertical direction intersects the straight line along the horizontal direction in the plane, or is not parallel in the space.

[0008] That is, in the implementation of the present application, two horizontal segments of the monopole arranged in cross are used as the radiator in the antenna unit, and both of the two monopoles are fed by the coupling feeding mode to decouple the low-frequency operating frequency band of the antenna unit. The above-mentioned antenna unit increases a coupling body near the monopole, the coupling body includes a pair of coupling structures, each of the coupling structures can be coupled with the horizontal segment and the vertical segment of one of the monopoles respectively, and the coupling structure and the vertical segment of the monopole extend in the same direction, and the coupling structure and the horizontal segment of the monopole extend in the opposite direction. Based on this, the radiation field of the vertical segment of the monopole can be weakened, and the radiation field of the horizontal segment of the monopole can be enhanced, thereby weakening the cross polarization of the monopole. The antenna unit can be a high-frequency unit or a low-frequency unit, which is not limited in the present application.

[0009] For example, the antenna unit includes a reflecting element, a coupling body, a first radiator and a second radiator which have the same structure. The first radiator, the second radiator and the coupling body are distributed on the same side of the reflecting element. The first radiator and the second radiator are flat monopoles, and the first radiator and the second radiator are fed by the coupling feeding mode.

[0010] In some implementations, the first radiator is in the shape of “arch” in the plane in which the first radiator is located, and the second radiator is in the shape of “arch” in the plane in which the second radiator is located. The plane in which the first radiator is located refers to the plane formed by the vertical direction and the first horizontal direction when the vertical direction and the first horizontal direction are in the same plane, and the plane in which the second radiator is located refers to the plane formed by the vertical direction and the second horizontal direction when the vertical direction and the second horizontal direction are in the same plane. The first radiator includes a first vertical segment arranged along the vertical direction, a first horizontal segment arranged along the first horizontal direction, and a first transition segment. One end of the first vertical segment is connected to one end of the first horizontal segment, and the other end of the first vertical segment is connected to one end of the first transition segment. The other end of the first transition segment is the feed-in end of the first radiator.

[0011] In other implementations, the first radiator is in the shape of “T” in the plane in which the first radiator is located. The second radiator is in the shape of “T” in the plane in which the second radiator is located. The first radiator includes a first vertical segment arranged along the vertical direction, a first horizontal segment arranged along the first horizontal direction, and a first transition segment. One end of the first vertical segment is connected to one end of the first horizontal segment, and the other end of the first vertical segment is connected to one end of the first transition segment. The other end of the first transition segment is the feed-in end of the first radiator. In addition, in order to balance the balance of the radiation field of the above-mentioned antenna unit, the first radiator further includes a balance segment extending in the opposite direction of the first horizontal segment from one end of the first horizontal segment.

[0012] It can be understood that the transition section in the first and second radiators can be cancelled, that is, the other end of the first vertical section is the feed-in end of the first radiator, and the other end of the second vertical section is the feed-in end of the second radiator.

[0013] The first coupling structure includes a first vertical coupling branch arranged along the vertical direction and a first horizontal coupling branch arranged along the first horizontal direction. The first vertical coupling branch extends in the same direction relative to the first vertical section and is coupled with the first vertical section, and the first horizontal coupling branch extends in the opposite direction relative to the first horizontal section and is coupled with the first horizontal section. Wherein, the same direction extension refers to the end of the coupling branch and the end of the vertical section (or the horizontal section) facing the same direction, and the opposite direction extension refers to the end of the coupling branch and the end of the vertical section (or the horizontal section) facing the opposite direction. The end refers to the end of the component extending into the surrounding environment, for example, the end can be: the other end of the first horizontal section, the other end of the second horizontal section, the other end of the first vertical section, the other end of the first vertical section, etc.

[0014] The second coupling structure includes a second vertical coupling branch arranged along the vertical direction and a second horizontal coupling branch arranged along the second horizontal direction. The second vertical coupling branch extends in the same direction relative to the second vertical section and is coupled with the second vertical section, and the second horizontal coupling branch extends in the opposite direction relative to the second horizontal section and is coupled with the second horizontal section.

[0015] The above antenna unit adopts a single pole with coupled feed, and decouples the antenna unit at a low frequency band through coupled feed, so that when the high frequency unit and the low frequency unit coexist in the array, the high frequency unit will not produce common mode and differential mode resonance at the low frequency working frequency band, thereby avoiding the deterioration of the directivity of the low frequency unit, and avoiding the strong receiving energy of the port of the high frequency unit and the increase of the isolation between systems. In addition, by cooperating the coupling structure with the single pole, the radiation field of the vertical section of the single pole is reduced, the radiation field of the horizontal section of the single pole is increased, the cross polarization of the single pole is reduced, and the electrical performance of the multi-frequency array antenna is improved.

[0016] In a possible implementation of the first aspect, in the above antenna unit, the horizontal sections of the two radiators are arranged perpendicularly, the vertical direction and the horizontal direction are perpendicular, and the vertical direction is perpendicular to the surface of the reflecting element.

[0017] That is, in the implementation of the present application, the vertical direction is perpendicular to the first surface of the reflecting element, the vertical direction and the first horizontal direction are perpendicular to each other, that is, the first horizontal direction is parallel to the first surface of the reflecting element, the vertical direction and the second horizontal direction are perpendicular to each other, that is, the second horizontal direction is parallel to the first surface of the reflecting element, and the first horizontal direction and the second horizontal direction are perpendicular to each other. Wherein, the first surface is the surface of the reflecting element facing the first and second radiators.

[0018] It can be understood that the perpendicularity in the present application is not absolute perpendicularity, and approximate perpendicularity caused by processing errors and assembly errors is also within the range of the perpendicularity in the present application. The parallelism in the present application is not absolute parallelism, and approximate parallelism caused by processing errors and assembly errors is also within the range of the parallelism in the present application. The present application does not specifically limit this, and the following will not be repeatedly described.

[0019] In a possible implementation of the first aspect, in the antenna unit, a horizontal coupling branch of a coupling structure is coupled to a first section of a horizontal section of a radiator, where the first section is a section of the horizontal section of the radiator between an end of the horizontal section and the intersection point. A horizontal coupling branch of another coupling structure is coupled to a second section of a horizontal section of another radiator, where the second section is a section of the horizontal section of the radiator between an end of the horizontal section and the intersection point. The intersection point refers to an intersection point at which the horizontal sections of the two radiators intersect each other.

[0020] For example, the intersection point is a position at which the first horizontal section of the first radiator intersects the second horizontal section of the second radiator. The first horizontal coupling branch in the first coupling structure is coupled to the section of the first horizontal section between the end of the first horizontal section and the intersection point. The second horizontal coupling branch in the second coupling structure is coupled to the section of the second horizontal section between the end of the second horizontal section and the intersection point.

[0021] In the coupling body in the antenna unit, the first vertical coupling branch in the first coupling structure is coupled to the first vertical section, and the first vertical section is connected to the end of the first horizontal section. In order to facilitate the connection between the first vertical coupling branch and the first horizontal coupling branch, and to reduce the design difficulty of the first coupling structure and the assembly difficulty of the first coupling structure, the first horizontal coupling branch in the first coupling structure is arranged at a position close to the end of the first horizontal section. Similarly, the second horizontal coupling branch in the second coupling structure is arranged at a position close to the end of the second horizontal section.

[0022] In summary, the coupling body in the antenna unit reduces the overall spatial layout difficulty, reduces the structure design difficulty of the coupling body, and also reduces the assembly difficulty of the coupling body.

[0023] In a possible implementation of the first aspect, in the antenna unit, the horizontal sections of the two radiators intersect to form four quadrants, and the horizontal coupling branches in the two coupling structures are in the same quadrant.

[0024] For example, the first horizontal section of the first radiator and the second horizontal section of the second radiator form a first quadrant, a second quadrant, a third quadrant and a fourth quadrant around the intersection. The first quadrant is a region formed between the first horizontal section on the same side of the intersection as the first vertical section and the second horizontal section on the same side of the intersection as the second vertical section, that is, a region formed between the first section of the first horizontal section and the second section of the second horizontal section. The third quadrant is a region opposite to the first quadrant. The second quadrant and the fourth quadrant form a quadrant therebetween. It can be understood that the first quadrant, the second quadrant, the third quadrant and the fourth quadrant refer to four spaces formed by extending the intersection shape of the first horizontal section and the second horizontal section along the vertical direction.

[0025] That is, in the implementation of the present application, the first horizontal coupling branch of the first coupling structure and the second horizontal coupling branch of the second coupling structure are located in the first quadrant. The coupling structure in the above-mentioned antenna unit is simple and convenient to install.

[0026] In a possible implementation of the first aspect, the first vertical coupling branch of the first coupling structure and the second vertical coupling branch of the second coupling structure are also located in the first quadrant.

[0027] In another possible implementation of the first aspect, the first horizontal coupling branch of the first coupling structure and the second horizontal coupling branch of the second coupling structure are located in the third quadrant.

[0028] In another possible implementation of the first aspect, the first vertical coupling branch of the first coupling structure and the second vertical coupling branch of the second coupling structure are also located in the third quadrant.

[0029] It can be understood that the foregoing implementation is only a simple enumeration of several relatively symmetrical layout modes of the first coupling structure and the second coupling structure. Those layout modes that are not symmetrical are also within the protection scope of the present application. For example, the first horizontal coupling branch of the first coupling structure is located in the first quadrant, and the second horizontal coupling branch of the second coupling structure is located in the second quadrant. For another example, the first horizontal coupling branch of the first coupling structure is located in the fourth quadrant, and the second horizontal coupling branch of the second coupling structure is located in the first quadrant. The present application does not describe them one by one.

[0030] In a possible implementation of the first aspect, in the above-mentioned antenna unit, the horizontal sections of the two radiators intersect to form four quadrants, and the horizontal coupling branches in the two coupling structures are located in opposite two quadrants.

[0031] For example, the first horizontal section of the first radiator and the second horizontal section of the second radiator form a first quadrant, a second quadrant, a third quadrant and a fourth quadrant around the intersection. The first quadrant is a region formed between the first horizontal section on the same side of the intersection as the first vertical section and the second horizontal section on the same side of the intersection as the second vertical section, that is, a region formed between the first section of the first horizontal section and the second section of the second horizontal section. The third quadrant is a region opposite to the first quadrant. The second quadrant and the fourth quadrant form a quadrant. It can be understood that the first quadrant, the second quadrant, the third quadrant and the fourth quadrant refer to four spaces formed by the intersection shape of the first horizontal section and the second horizontal section extending along the vertical direction.

[0032] That is, in the implementation of the present application, the first horizontal coupling branch of the first coupling structure is located in the fourth quadrant and the second horizontal coupling branch of the second coupling structure is located in the second quadrant. Based on the arrangement positions of the first horizontal coupling branch and the second horizontal coupling branch, the coupling body in the above-mentioned antenna unit can further optimize the coupling between the first vertical coupling branch and the first vertical section and the coupling between the second vertical coupling branch and the second vertical section.

[0033] In a possible implementation of the first aspect, in the above-mentioned antenna unit, in each radiator, the other end of the vertical section is the feed-in end of the radiator. Alternatively, each radiator further includes a transition section, one end of the transition section is connected to the vertical section, and in each radiator, the other end of the transition section is the feed-in end of the radiator. The feed-in end of the radiator in the above-mentioned antenna unit is not specifically limited in the present application.

[0034] In a possible implementation of the first aspect, in the above-mentioned antenna unit, the vertical section in each radiator includes a first sub-vertical section, a second sub-vertical section and a sub-horizontal section coupled to the horizontal section. The one end of the first sub-vertical section is connected to the one end of the horizontal section, the other end of the first sub-vertical section is connected to the one end of the sub-horizontal section, and the other end of the sub-horizontal section is connected to the one end of the second sub-vertical section.

[0035] For example, the first vertical section in the first radiator includes a first sub-vertical section and a second sub-vertical section in staggered distribution, and a first sub-horizontal section coupled to the first horizontal section, and the orthographic projection of the first sub-horizontal section in the first surface of the reflecting element falls within the orthographic projection of the first horizontal section in the first surface of the reflecting element. The one end of the first sub-vertical section is connected to the one end of the first horizontal section, the other end of the first sub-vertical section is connected to the one end of the first sub-horizontal section, the other end of the first sub-horizontal section is connected to the one end of the second sub-vertical section, and the other end of the second sub-vertical section is connected to the end opposite to the feed-in end in the transition section.

[0036] The first horizontal section and the first sub-horizontal section in the first radiating element are coupled to increase the current flow path from the feed end to one end of the first horizontal section, thereby increasing the bandwidth of the first radiating element.

[0037] Based on this, the bandwidth of the antenna using the above antenna unit can be increased by increasing the length of the sub-horizontal section in the vertical end of the radiating element.

[0038] In a possible implementation of the first aspect, the antenna unit further includes a balancing section extending from one end of the horizontal section in the opposite direction of the horizontal section.

[0039] In a possible implementation of the first aspect, the two coupling structures are connected.

[0040] In the implementation of the present application, the first coupling structure and the second coupling structure are directly connected, or the first coupling structure and the second coupling structure are coupled and connected, or the first coupling structure and the second coupling structure are connected through other structures, which are not limited in the present application.

[0041] In a possible implementation of the first aspect, the first coupling structure and the second coupling structure can not be connected.

[0042] In a possible implementation of the first aspect, the length of each radiating element ranges from 0.25 to 0.75 times the wavelength of the highest carrier frequency, wherein the length of each radiating element is the dimension from the feed end of the radiating element to the other end of the horizontal section of the radiating element.

[0043] In a possible implementation of the first aspect, the length of the coupling structure ranges from 0.25 to 0.5 times the wavelength of the highest carrier frequency, wherein the length of the coupling structure is the dimension from the other end of the vertical coupling branch to the other end of the horizontal coupling branch.

[0044] In a possible implementation of the first aspect, the antenna unit further includes a feed strip electrically connected to the feed network, and the feed strip is electrically connected to the vertical section.

[0045] In a possible implementation of the first aspect, the vertical coupling branch in the coupling structure is electrically connected to the reflecting element or in contact with the reflecting element.

[0046] In a possible implementation of the first aspect, the antenna unit further includes a metal column configured to cancel the radiation of the two radiators in a direction perpendicular to the vertical direction.

[0047] The metal column is located in a quadrant formed by the first radiator and the second radiator. For example, the metal column is arranged on a surface of the second connecting structure between the first coupling structure and the second coupling structure, and extends along the vertical direction towards the first horizontal section and the second horizontal section. The metal column is coupled with the horizontal radiation field to form a reverse suppression current, which can cancel the horizontal radiation of the first radiator and the second radiator.

[0048] It can be understood that the metal column can only achieve the function of canceling the horizontal radiation, and the arrangement position and size of the metal column are not specifically limited in the present application. Any implementation that can achieve the foregoing function is within the protection scope of the present application.

[0049] In a possible implementation of the first aspect, in the antenna unit, in the vertical direction, a surface of the metal column facing the surface of the reflecting element is flush with a surface of the feed-in end of the radiator facing the surface of the reflecting element, and a size of the metal column in the vertical direction is less than or equal to 0.25 times the wavelength of the highest carrier frequency.

[0050] In a possible implementation of the first aspect, the antenna unit further includes a directing piece arranged on a side of the two radiators away from the reflecting element. The directing piece in the antenna unit can improve the current balance in the radiators, so that the directivity pattern of the antenna unit converges symmetrically.

[0051] In a possible implementation of the first aspect, the directing piece in the antenna unit is provided with cross-arranged through slots, and an extension direction of the through slots is 45° relative to the horizontal direction.

[0052] In a possible implementation of the first aspect, the antenna unit includes a first clearance groove arranged on a side of the horizontal section of one of the radiators away from the vertical section. The horizontal section of the other radiator is accommodated in the first clearance groove on the horizontal section of one of the radiators. The two radiator structures in the antenna unit are ingenious and facilitate installation.

[0053] In a possible implementation of the first aspect, the horizontal section of the other radiator is provided with a second clearance groove on the side facing the vertical section, and the surface of the horizontal section of the two radiators facing away from the reflecting element is in the same plane when the first clearance groove on the horizontal section of one radiator is engaged in the second clearance groove on the horizontal section of the other radiator. That is, in the embodiment of the present application, the surface of the first horizontal section of the first radiator facing away from the reflecting element is in the same plane as the surface of the second horizontal section of the second radiator facing away from the reflecting element. The two-radiator structure is ingenious and facilitates installation.

[0054] The second aspect of the present application provides an antenna, which specifically includes at least one antenna unit as in the first aspect of the present application and any possible implementation of the first aspect of the present application, and at least one antenna unit is arranged in an array.

[0055] The third aspect of the present application provides a system of antenna and feeder, which specifically includes any antenna as in the second aspect of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0056] FIG. 1(a) shows a top view of an antenna array in some embodiments of the present application;

[0057] FIG. 1(b) shows a side view of an antenna array in some embodiments of the present application;

[0058] FIG. 2(a) shows a schematic diagram of a system of antenna and feeder in some embodiments of the present application;

[0059] FIG. 2(b) shows a schematic diagram of the structure of an antenna 1 in some embodiments of the present application;

[0060] Figure 3 FIG. 3 shows an exploded view of an antenna unit 10' in some embodiments of the present application;

[0061] FIG. 4(a) shows a top view of an antenna unit 10 in some embodiments of the present application;

[0062] FIG. 4(b) shows a top view of an antenna unit 10 in some embodiments of the present application, in which the structural features below the director 700 are shown by dashed lines;

[0063] FIG. 4(c) shows a perspective view of an antenna unit 10 in some embodiments of the present application, in which the director 700 is moved a distance upwards;

[0064] FIG. 4(d) shows a side view of an antenna unit 10 in some embodiments of the present application;

[0065] FIG. 5(a) shows a perspective view of a first radiator 100 in an antenna unit 10 in some embodiments of the present application;

[0066] Figure 5(b) shows a perspective view of the first feed strip 500 in the antenna unit 10 in some embodiments of the application;

[0067] Figure 5(c) shows a perspective view of the first radiator 100 and the first feed strip 500 coupled and electrically connected in the antenna unit 10 in some embodiments of the application;

[0068] Figure 5(d) shows a perspective view of the first radiator 100a in the antenna unit 10 in some other embodiments of the application;

[0069] Figure 6 Figure 6 shows a perspective view of the second radiator 200 in the antenna unit 10 in some embodiments of the application;

[0070] Figure 7 Figure 7 shows a perspective view of the coupling body 400 in some embodiments of the application;

[0071] Figure 8 Figure 8 shows a top view of the first radiator 100, the second radiator 200, the reflecting element 300 and the coupling body 400 assembled in some embodiments of the application;

[0072] Figure 9 Figure 9 shows a perspective view of the coupling body 400a in some other embodiments of the application;

[0073] Figure 10(a) shows a top view of the first radiator 100, the second radiator 200, the reflecting element 300 and the coupling body 400a assembled in some embodiments of the application;

[0074] Figure 10(b) shows a top view of the first radiator 100, the second radiator 200, the reflecting element 300 and the coupling body 400a assembled in some embodiments of the application;

[0075] Figure 10(c) shows a side view of the first radiator 100, the second radiator 200, the reflecting element 300 and the coupling body 400a assembled in some embodiments of the application;

[0076] Figure 11(a) shows a top view of the antenna array in some embodiments of the application;

[0077] Figure 11(b) shows a side view of the antenna array in some embodiments of the application;

[0078] Figure 11(c) shows a distribution diagram of the antenna unit 10 in some embodiments of the application;

[0079] Figure 12 Figure 12 shows a radiation pattern of the low frequency unit 10b in the scenario of Figure 11(c);

[0080] Figure 13 Fig. 11(c) shows a schematic diagram of the isolation of the low frequency unit 10b and the high frequency unit 10a in the application scenario of Fig. 11(c).

[0081] Reference signs:

[0082] 10 - antenna unit;

[0083] 10a - high frequency unit;

[0084] 10b - low frequency unit;

[0085] 11 - radiator;

[0086] 11a - high frequency radiator;

[0087] 11b - low frequency radiator;

[0088] 12 - reflecting element;

[0089] 10' - antenna unit;

[0090] 11' - radiator;

[0091] 12' - feed structure;

[0092] 13' - high impedance section;

[0093] 14' - low impedance section;

[0094] 1 - antenna;

[0095] 10 - antenna unit; 20 - phase shifter; 30 - transmission network; 40 - calibration network; 50 - combiner; 60 - filter; 70 - radome; 80 - antenna joint;

[0096] 2 - antenna adjustment bracket; 3 - antenna holding pole; 4 - joint seal; 5 - grounding device; 6 - feeder;

[0097] 100 - first radiator; 101 - feed-in end; 1 1 - first broken line;

[0098] 110 - first vertical section; 1101 - one end of the first vertical section; 1102 - the other end of the first vertical section;

[0099] 111 - first sub-vertical section;

[0100] 112 - second sub-vertical section;

[0101] 113 - first sub-horizontal section;

[0102] 120 - first horizontal section; 1201 - one end of the first horizontal section; 1202 - the other end of the first horizontal section;

[0103] 121 - first displacement slot;

[0104] 130 - first transition section; 131 - transition horizontal section; 132 - transition inclined section; 133 - transition vertical section;

[0105] 200 - second radiating element; 201 - feed-in end; l2 - second dotted line;

[0106] 210 - second vertical section; 2101 - one end of the second vertical section; 2102 - the other end of the second vertical section;

[0107] 220 - second horizontal section; 2201 - one end of the second horizontal section; 2202 - the other end of the second horizontal section;

[0108] 221 - second displacement slot;

[0109] 230 - second transition section;

[0110] 300 - reflecting element;

[0111] 400 - coupling body; l3 - third dotted line;

[0112] 410 - first coupling structure; 411 - first vertical coupling branch; 412 - first horizontal coupling branch;

[0113] 420 - second coupling structure; 421 - second vertical coupling branch; 422 - second horizontal coupling branch;

[0114] 430 - first connecting structure;

[0115] 440 - second connecting structure;

[0116] 400a - coupling body;

[0117] 410a - first coupling structure; 411a - first vertical coupling branch; 412a - first horizontal coupling branch;

[0118] 420a - second coupling structure; 421a - second vertical coupling branch; 422a - second horizontal coupling branch;

[0119] 440a - second connecting structure;

[0120] 500 - first feeding strip line;

[0121] 600 - second feeding strip line;

[0122] 700 - guiding sheet;

[0123] 800 - metal column. DETAILED DESCRIPTION

[0124] For the purpose of making the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0125] The present application provides a kind of antenna feeder system, which includes antenna and feeder line.The schematic diagram of the antenna feeder system in some embodiments of the present application is shown in Figure 2 (a).As shown in Figure 2 (a), the antenna feeder system specifically includes antenna 1, antenna adjustment support 2, antenna holding pole 3, joint seal 4, grounding device 5 and feeder line 6.Among them, antenna 1 is an indispensable part of wireless communication, mainly used for transmitting and receiving electromagnetic waves.When transmitting signals, antenna 1 converts high-frequency current into radio waves, and when receiving signals, antenna 1 converts electromagnetic waves into high-frequency current.Antenna 1 is installed on antenna holding pole 3 through antenna adjustment support 2.Antenna holding pole 3, also known as antenna support, is used to fix and support antenna 1.Antenna holding pole 3 can withstand corresponding external load (for example, wind load), and the type of antenna holding pole 3 is also different for different types of antenna 1.Antenna adjustment support 2 is used to adjust the installation position and installation direction of antenna 1, and antenna adjustment support 2 cooperates with holding pole 3 to determine the installation position and installation direction of antenna 1, thereby adjusting the area that can be covered by antenna 1.Joint seal 4 is provided at the interface between antenna 1 and feeder line 6, and joint seal 4 is provided at the interface between feeder line 6 and base station equipment.Feeder line 6 is used to transmit signals from base station equipment to the circuit of antenna 1.

[0126] Figure 2 (b) shows the schematic diagram of the composition structure of antenna 1 in some embodiments of the present application.As shown in Figure 2 (b), the present application provides an antenna 1, which includes a radome 70 and a plurality of antenna units 10, phase shifters 20, transmission networks 30, calibration networks 40, combiners 50 and filters 60 arranged in the radome 70.Antenna 1 also includes antenna joints 80, and antenna joints 80 are connected to combiners 50 and / or filters 60 through cables and located outside the radome 70.The parts in antenna 1 will be briefly described below.

[0127] Antenna unit 10 receives or transmits radio frequency signals through a feed network, and antenna unit 10 includes a radiator 11 and a reflecting element 12.Radiator 11, also known as antenna element or element, is a unit that constitutes the basic structure of antenna element, used for radiating or receiving radio waves.Reflecting element 12, also known as bottom plate, antenna panel or metal reflecting surface, is used to improve the receiving sensitivity of antenna signals, and to reflect and concentrate antenna signals on the receiving point.Reflecting element 12 not only enhances the receiving and transmitting capabilities of antenna 1, but also blocks and shields other electromagnetic waves from the back (opposite direction) of antenna 1 from receiving signals.

[0128] The feed network is usually composed of controlled impedance transmission lines. The feed network can be connected through the transmission network 30 to achieve different radiation beam pointing. Or, the feed network is connected with the calibration network 40 to obtain the calibration signal required by the antenna system. It can be understood that the feed network can include modules (for example, combiner 50, filter 60, etc.) capable of expanding the performance in addition to the phase shifter 20. The feed network is used to feed the wireless signal to at least one radiator 11 according to a certain amplitude and phase or transmit the received wireless signal to the signal processing unit of the base station equipment according to a certain amplitude and phase.

[0129] The phase shifter 20 is used for electrical adjustment of the antenna 1 pattern. The phase shifter 20 realizes electrical adjustment of the antenna 1 pattern by changing the phase of the signal, so as to achieve the purpose of remote control adjustment of the network coverage area under different conditions.

[0130] The combiner 50 and the filter 60 are used to expand the performance of the feed network.

[0131] The radome 70 is a structural member for protecting the antenna 1 from external environment. The radome 70 not only has good electromagnetic wave penetration characteristics in electrical performance, but also has good mechanical performance and can withstand external harsh environment.

[0132] The antenna joint 80 is used to receive the signal input from the feeder 6, and transmit the input signal to the combiner 50 and / or the filter 60, and then output the required power and phase to different antenna elements through the phase shifter 20.

[0133] Modern communication requires the miniaturization of the antenna, which makes multiple antenna units need to be arranged in a small space in the antenna design, and thus causes serious mutual coupling between the multiple antenna units. For example, in some application scenarios of the present application, the antenna units in the multi-frequency antenna include high-frequency units and low-frequency units. In order to arrange the antenna units in a limited space, the high-frequency units and the low-frequency units are densely arranged on the surface of the reflecting element in an interleaved manner, which causes the high-frequency units and the low-frequency units working at different frequency bands to interfere with each other, and thus reduces the performance of the antenna.

[0134] In order to solve the above problems, on the one hand, the generation of common mode resonance of the high-frequency units in the antenna can be suppressed by reducing the size of the high-frequency units, and thus the influence of the high-frequency units on the low-frequency units is reduced, but this will increase the cost of the high-frequency units, and the economic benefit is crossed. On the other hand, the isolation between systems can be improved by adding filters or filter networks to the feed network of the high-frequency units in the antenna.

[0135] Figure 3 An exploded view of the antenna unit 10' in some embodiments of the present application is shown. As shown in FIG. 1, the antenna unit 10' includes a high-frequency unit 10a and a low-frequency unit 10b. The high-frequency unit 10a and the low-frequency unit 10b are densely arranged on the surface of the reflecting element 10c in an interleaved manner. Figure 3As shown, the present application provides an antenna unit 10', which comprises a radiator 11' and two polarized orthogonal feed structures 12'. The radiator 11' is a dual-polarized dipole. The radiator 11' has two groups of radiation arms (not shown) with orthogonal polarization directions, and the two straight lines along which the polarization directions of the radiation arms extend are diagonally across the surface of the radiator 11'. The feed structures 12' are fixed to the radiator 11' and coupled to the radiator 11', and the two feed structures 12' are arranged orthogonally, and each feed structure 12' feeds one group of radiation arms.

[0136] The feed structure 12' comprises an input end, an open end, and a filter section between the input end and the open end. The filter section is formed by size changes and has a plurality of high-impedance sections 13' and a plurality of low-impedance sections 14' arranged alternately, so as to form a stepped impedance transformation filter in the filter section. The feed structure 12' is a conductor and has an impedance by itself. It can be understood that, in the case of the same material, the longer the length and the smaller the width, the greater the impedance. Based on this, by forming protrusions or recesses in the filter section, a plurality of regions with different impedances can be formed in the filter section, so that the impedance in the filter section changes in a stepped manner.

[0137] The feed structure 12' is a metal feed column and has a plurality of disc structures arranged coaxially and spaced apart along the axial extension direction of the filter section. In the process of feeding the radiator 11', the plurality of high-impedance sections 13' and the plurality of low-impedance sections 14' have impedance, inductance and capacitance, which are equivalent to a series resistance and a series-parallel inductance and capacitance in a conventional circuit, so that the filter section is equivalent to a stepped impedance transformation filter. Moreover, by changing the sizes, the impedance and the inductance and capacitance of the high-impedance sections 13' and the low-impedance sections 14' can be adjusted, so that the filter section realizes low-pass. When the characteristic impedance is very high, it can be equivalent to a series inductance, and the parallel capacitance is very small; when the characteristic impedance is very low, it can be equivalent to a parallel capacitance. That is, the circuit has a filtering characteristic. Through the filtering characteristic of the filter section, the mutual interference of the radiators 11' of different working frequency bands can be effectively avoided, and the isolation between different systems can be improved.

[0138] In the above-mentioned antenna unit 10', a plurality of high-impedance sections 13' and a plurality of low-impedance sections 14' are formed by size changes and arranged alternately, so as to form a stepped impedance transformation filter in the filter section, and then the suppression effect on low-frequency signals is achieved. However, this way of adding a filter network in the feed network will cause large signal loss in the antenna system and reduce the actual effective utilization rate.

[0139] To solve the problem of large signal loss in an antenna system, an antenna unit is provided in the present application. In the present application, the antenna unit can be a high-frequency unit. The antenna unit can also be a low-frequency unit, which is not specifically limited in the present application. In the antenna unit, two horizontal sections of monopoles (e.g., a first radiator 100 and a second radiator 200) are arranged in a cross manner as radiators, and both of the monopoles are fed in a coupled manner to decouple the low-frequency operating frequency band of the antenna unit. In addition, a coupling body is added near the monopoles in the above antenna unit, and the coupling body includes a pair of coupling structures. Each of the coupling structures can be coupled with the horizontal section and the vertical section of one of the monopoles, respectively. The coupling structures and the vertical sections of the monopoles extend in the same direction, and the coupling structures and the horizontal sections of the monopoles extend in opposite directions.

[0140] In an embodiment of the present application, as shown in FIG. 4(c), by reasonably adjusting the coupling area and the coupling distance of the coupling structures and the monopoles, the current I1 in the vertical section of the monopole and the current I1' in the coupling structure adjacent to the vertical section of the monopole are in opposite directions, and the current I2 in the horizontal section of the monopole and the current I2' in the coupling structure adjacent to the horizontal section of the monopole are in the same direction. The current I1' and the current I2' in the coupling structure are obtained by coupling the current in the monopole.

[0141] In the above antenna unit, the radiators are monopoles fed in a coupled manner, which decouples the low-frequency band of the antenna unit. When the high-frequency unit and the low-frequency unit coexist in the array, the high-frequency unit does not produce common mode and differential mode resonance in the low-frequency operating frequency band, thereby avoiding the deterioration of the directivity of the low-frequency unit, the strong receiving energy of the port of the high-frequency unit, and the increase of the isolation between systems. In addition, the coupling structures and the monopoles are combined to reduce the radiation field of the vertical section of the monopole, increase the radiation field of the horizontal section of the monopole, reduce the cross polarization of the monopole, and improve the electrical performance of the multi-frequency array antenna.

[0142] The antenna unit 10 in the present application will be described in detail below with reference to the accompanying drawings.

[0143] FIG. 4(a) shows a top view of the antenna unit 10 in some embodiments of the present application. FIG. 4(b) shows a top view of the antenna unit 10 in some embodiments of the present application, in which the structural features below the director patch 700 are shown by dashed lines. FIG. 4(c) shows a perspective view of the antenna unit 10 in some embodiments of the present application, in which the director patch 700 is moved a distance upwards. FIG. 4(d) shows a side view of the antenna unit 10 in some embodiments of the present application.

[0144] In combination with Figures 4(a) to 4(c)As can be seen, the antenna unit 10 comprises the first radiator 100, the second radiator 200, the reflecting element 300 and the coupling body 400. The first radiator 100, the second radiator 200 and the coupling body 400 are distributed on the same side of the reflecting element 300. For the convenience of the following description, the surface of the reflecting element 300 on which the first radiator 100, the second radiator 200 and the coupling body 400 are mounted is defined as the first surface. It can be understood that, as shown in FIG. 4(d), the mounting can be that the first radiator 100, the second radiator 200 and the coupling body 400 are located above the reflecting element 300.

[0145] Before introducing the assembly relationship between the various components (the first radiator 100, the second radiator 200, the reflecting element 300 and the coupling body 400) in the aforementioned antenna unit 10, the specific structural features of the first radiator 100, the second radiator 200, the reflecting element 300 and the coupling body 400 will be described in detail.

[0146] As shown in FIG. 4(c), the first radiator 100 and the second radiator 200 are plate-shaped monopoles, and the first radiator 100 and the second radiator 200 are fed by a coupling feeding mode.

[0147] FIG. 5(a) shows a perspective view of the first radiator 100 in the antenna unit 10 in some embodiments of the present application. As shown in FIG. 5(a), the first radiator 100 is in the shape of an "arch" in the plane in which the first radiator 100 is located, wherein the plane in which the first radiator 100 is located refers to the plane in which the first radiator 100 is distributed, for example, the plane formed by the vertical direction and the first horizontal direction in the following, wherein the vertical direction can be the direction indicated by the Z axis in FIG. 4(c), and the first horizontal direction can be the direction indicated by D1 in FIG. 4(c).

[0148] As can be seen from FIG. 4(c) and FIG. 5(a), the first radiator 100 comprises a first vertical segment 110 arranged along a vertical direction, a first horizontal segment 120 arranged along a first horizontal direction, and a first transition segment 130. One end 1101 of the first vertical segment 110 is connected to one end 1201 of the first horizontal segment 120, and the other end 1102 of the first vertical segment 110 is connected to one end of the first transition segment 130. The other end of the first transition segment 130 serves as a feed-in end 101 of the first radiator 100. The vertical direction intersects the first surface of the reflecting element 300, and the vertical direction intersects the first horizontal direction. One end 1101 of the first vertical segment 110 points to the other end 1102 of the first vertical segment 110 along the vertical direction (for example, the reverse direction of the Z axis in FIG. 4(c)), and one end 1201 of the first horizontal segment 120 points to the other end 1202 of the first horizontal segment 120 along the first horizontal direction (for example, the direction of D1 in FIG. 4(c)).

[0149] In some embodiments of the present application, the vertical direction is perpendicular to the first surface of the reflective element 300, and the vertical direction and the first horizontal direction are perpendicular to each other, i.e., the first horizontal direction is parallel to the first surface of the reflective element 300. It can be understood that the perpendicular to each other and the parallel to each other in the present application include approximately perpendicular to each other and approximately parallel to each other, which are not specifically limited in the present application, and will not be repeated hereinafter.

[0150] With continuous reference to FIG. 5(a), in some embodiments of the present application, the first vertical section 110 includes the first sub-vertical section 111 and the second sub-vertical section 112 distributed in a staggered manner, and the first sub-horizontal section 113 coupled with the first horizontal section 120, and the orthographic projection of the first sub-horizontal section 113 in the first surface of the reflective element 300 falls within the orthographic projection of the first horizontal section 120 in the first surface of the reflective element 300.

[0151] In some embodiments of the present application, the first sub-vertical section 111 is connected at one end thereof to one end 1201 of the first horizontal section 120, and at the other end thereof to one end of the first sub-horizontal section 113, and the other end of the first sub-horizontal section 113 is connected to one end of the second sub-vertical section 112, and the other end of the second sub-vertical section 112 is connected to the other end of the first transition section 130 opposite to the feed-in end 101.

[0152] In some embodiments of the present application, the first transition section 130 includes a transition horizontal section 131, a transition inclined section 132 and a transition vertical section 133, and the orthographic projection of the transition horizontal section 131 in the first surface of the reflective element 300 coincides with the orthographic projection of the first sub-horizontal section 113 in the first surface of the reflective element 300. One end of the transition horizontal section 131 is connected to the other end of the second sub-vertical section 112, and the other end of the transition horizontal section 131 is connected to one end of the transition inclined section 132, and the other end of the transition inclined section 132 is connected to one end of the transition vertical section 133, and the other end of the transition vertical section 133 is the feed-in end 101.

[0153] In some embodiments of the present application, the orthographic projection of the feed-in end 101 in the first surface of the reflective element 300 is outside the orthographic projection of the first radiator 100 in the first surface of the reflective element 300.

[0154] It can be understood that in some alternative embodiments of the present application, the first radiator 100 includes the first vertical section 110 and the first horizontal section 120. One end of the first vertical section 110 is connected to one end of the first horizontal section 120, and the other end of the first vertical section 110 is the feed-in end 101.

[0155] In some embodiments of the present application, the length of the first radiator 100 ranges from 0.25 to 0.75 times the wavelength of the highest carrier frequency. The length of the first radiator 100 refers to the length from the P1 at the feed-in end 101 of the first radiator 100 to the P2 at the other end 1202 of the first horizontal section 120 along the transition vertical section 133, the transition inclined section 132, the transition horizontal section 131, the second vertical section 112, the first horizontal section 113, the first vertical section 111 and the first horizontal section 120, as shown by the first dashed line l1 in FIG. 5(a). Each segment of the first dashed line l1 can be the center line of the corresponding section.

[0156] In some implementations of the present application, as shown in FIG. 4(c), the first surface of the reflecting element 300 is rectangular, and the angle between the first horizontal direction in which the first horizontal section 120 extends and one side of the rectangle is 45°, i.e., the angle between D1 and one side of the rectangle is 45°, and the angle between the second horizontal direction and the side of the rectangle is 45°, i.e., the angle between D2 and one side of the rectangle is 45°.

[0157] In some implementations of the present application, for the coupling feeding mode of the first radiator 100, as shown in FIG. 4(c), in some embodiments of the present application, the antenna unit 10 further includes a first feeding strip 500. The first feeding strip 500 is electrically connected to the feeding network and is coupled to the first vertical section 110. For example, as shown in FIG. 5(b), the first feeding strip 500 is formed with a first feeding hole 510 having a size greater than the feed-in end 101 of the first radiator 100. As shown in FIG. 5(c), the feed-in end 101 of the first radiator 100 is inserted into the first feeding hole 510 to achieve the coupling feeding of the first radiator 100. It can be understood that the antenna unit 10 further includes a second feeding strip 600 for coupling feeding of the second radiator 200. Since the coupling feeding principle is the same as that of the first feeding strip 500 for coupling feeding of the first radiator 100, it will not be described here.

[0158] In some embodiments of the present application, the antenna unit 10 includes a first radiator 100a. FIG. 5(d) shows a perspective view of the first radiator 100a in the antenna unit 10 in some embodiments of the present application. As compared with FIG. 5(a) and FIG. 5(d), the first radiator 100a has the same working principle as the first radiator 100, and the first radiator 100a and the first radiator 100 have substantially the same structure. Therefore, the differences between the first radiator 100a and the first radiator 100 will be described below.

[0159] As shown in Figure 5(d), the first radiator 100a is T-shaped within its plane. As shown in Figure 5(d), the first radiator 100a includes a first vertical segment 110a arranged along a vertical direction, a first horizontal segment 120a arranged along a first horizontal direction, and a first transition segment 130a. One end 1101a of the first vertical segment 110a connects to one end 1201a of the first horizontal segment 120a, and the other end 1102a of the first vertical segment 110a connects to one end of the first transition segment 130a. The other end of the first transition segment 130a serves as the feed end 101a of the first radiator 100a. The vertical direction intersects with the first surface of the reflecting element 300a, and the vertical direction intersects with the first horizontal direction. One end 1101a of the first vertical segment 110a points along the vertical direction (e.g., in the opposite direction of the Z-axis in Figure 4(c)) to the other end 1102a of the first vertical segment 110a, and one end 1201a of the first horizontal segment 120a points along the first horizontal direction (e.g., the D1 direction in Figure 4(c)) to the other end 1202a of the first horizontal segment 120a. The plane in which the first radiator 100a is located is similar to the plane in which the first radiator 100 is located, and will not be described in detail here.

[0160] In some embodiments of this application, as shown in FIG5(d), in order to balance the radiation field of the antenna element 10, the first radiator 100a further includes a balancing segment 140a extending in the opposite direction to the first horizontal segment 120a from one end 1201a of the first horizontal segment 120a.

[0161] In some embodiments, the length dimension of the first radiator 100a ranges from 0.25 times to 0.75 times the wavelength of the highest carrier frequency. Here, the length dimension of the first radiator 100a refers to the P-axis of the feed end 101a of the first radiator 100a. 1a P extends along the first transition section 130a, the first vertical section 110a, and the first horizontal section 120a to the other end 1202a of the first horizontal section 120a. 2a The dimension at that point is shown by the first dashed line l in Figure 5(d). 1a Among them, the first dashed line l 1a Each segment can be the centerline of the aforementioned parts.

[0162] After introducing the structure of the first radiator 100 and the first radiator 100a, the second radiator 200 will be introduced below. Figure 6 A perspective view of the second radiator 200 in the antenna element 10 in some embodiments of this application is shown. (See Figures 4(c), 5(a), and...) Figure 6It is not difficult to see that the first radiator 100 and the second radiator 200 have basically the same structure, and the first radiator 100 and the second radiator 200 work on the same principle. Based on this, the second radiator 200 will be briefly described below.

[0163] like Figure 6 As shown, the second radiator 200 includes a second vertical segment 210 arranged along a vertical direction, a second horizontal segment 220 arranged along a second horizontal direction, and a second transition segment 230, wherein the second horizontal direction intersects with the first horizontal direction. The second horizontal direction can be the direction indicated by D2 in Figure 4(c).

[0164] In some implementations of this application, one end 2101 of the second vertical segment 210 points to the other end 2102 of the second vertical segment 210 along the vertical direction (e.g., in the opposite direction of the Z-axis in Figure 4(c)), and one end 2201 of the second horizontal segment 220 points to the other end 2202 of the second horizontal segment 220 along the second horizontal direction (e.g., the D2 direction in Figure 4(c)).

[0165] In some implementations of this application, the second horizontal direction is parallel to the first surface of the reflective element 300.

[0166] In some embodiments of this application, the length of the second radiator 200 is the same as the length of the first radiator 100. The length of the second radiator 200 refers to the dimension from point P3 at the feed end 201 of the second radiator 200 to point P4 at the other end of the second horizontal segment 220, such as... Figure 6 The second dashed line l2 in the diagram.

[0167] In some embodiments of this application, as shown in FIG4(c), the first horizontal segment 120 in the first radiator 100 and the second horizontal segment 220 in the second radiator 200 are arranged intersectingly.

[0168] In some implementations of this application, the angle between the first horizontal direction of the first horizontal segment 120 and the second horizontal direction of the second horizontal segment 220 is 90°.

[0169] Combining Figure 4(c), Figure 5(a) and Figure 6 It is not difficult to see that in the antenna unit 10, the first radiator 100 and the second radiator 200 are different in that the first radiator 100 and the second radiator 200 are placed in different positions and the structure at the intersection of the first radiator 100 and the second radiator 200 is different.

[0170] In some embodiments of the present application, as shown in FIG. 4(c) and FIG. 5(a), the first horizontal section 120 is provided with a first avoiding slot 121 on the side facing away from the first vertical section 110. The second horizontal section 220 of the second radiator 200 is placed in the first avoiding slot 121 on the first horizontal section 120.

[0171] It can be understood that in some alternative embodiments of the present application, the first horizontal section 120 of the first radiator 100 is provided with a first avoiding slot (not shown) on the side facing the first vertical section 110. The second horizontal section 220 of the second radiator 200 is placed in the first avoiding slot on the first horizontal section 120.

[0172] In some embodiments of the present application, as shown in FIG. 4(c), FIG. 5(a) and Figure 6 (a), the second horizontal section 220 is provided with a second avoiding slot 221 on the side facing the second vertical section 210, which is matched with the first avoiding slot 121. When the first radiator 100 and the second radiator 200 are installed, the first avoiding slot 121 on the first horizontal section 120 is buckled into the second avoiding slot 221 on the second horizontal section 220.

[0173] In some embodiments of the present application, when the first avoiding slot 121 on the first horizontal section 120 is buckled into the second avoiding slot 221 on the second horizontal section 220, the surface of the first horizontal section 120 facing away from the reflecting element 300 and the surface of the second horizontal section 220 facing away from the reflecting element 300 are in the same plane.

[0174] It can be understood that the forming process of the first radiator 100 and the second radiator 200 can be at least one of die casting, sheet metal, and electroplating metal on the surface of plastic material, which is not limited in the present application. The first radiator 100 and the second radiator 200 can be made of conventional non-magnetic metal materials such as copper, aluminum alloy, zinc alloy, etc., which is not limited in the present application.

[0175] After introducing the specific structure of the first radiator 100 and the second radiator 200 and the assembly relationship of the first radiator 100 and the second radiator 200, the specific structure of the coupling body 400 and the assembly relationship of the coupling body 400 with the first radiator 100 and the second radiator 200 will be described in detail.

[0176] Figure 7 A perspective view of the coupling body 400 in some embodiments of the present application is shown. As shown in FIG. 4(d), the coupling body 400 is provided with a first coupling section 410 and a second coupling section 420. Figure 7As shown, the coupling body 400 includes a first coupling structure 410 and a second coupling structure 420. The first coupling structure 410 and the second coupling structure 420 can be connected or not connected, and the connection mode of the first coupling structure 410 and the second coupling structure 420 can be that the first coupling structure 410 and the second coupling structure 420 are directly connected, or the first coupling structure 410 and the second coupling structure 420 are coupled and connected, or the first coupling structure 410 and the second coupling structure 420 are connected through other structures, which is not limited in the present application.

[0177] The first coupling structure 410 includes a first vertical coupling branch 411 arranged along a vertical direction and a first horizontal coupling branch 412 arranged along a first horizontal direction. The first vertical coupling branch 411 extends in the same direction relative to the first vertical section 110 and is coupled with the first vertical section 110, and the first horizontal coupling branch 412 extends in the opposite direction relative to the first horizontal section 120 and is coupled with the first horizontal section 120. The same direction extension refers to that the end of the coupling branch and the end of the vertical section (or the horizontal section) are directed to the same direction, and the opposite direction extension refers to that the end of the coupling branch and the end of the vertical section (or the horizontal section) are directed to the opposite direction. The end refers to the end of the component extending into the surrounding environment, for example, the end can be the other end 1202 of the first horizontal section 120, the other end 2202 of the second horizontal section 220, the other end 1102 of the first vertical section 110, the other end 2102 of the second vertical section 210, and the like.

[0178] The second coupling structure 420 includes a second vertical coupling branch 421 arranged along a vertical direction and a second horizontal coupling branch 422 arranged along a second horizontal direction. The second vertical coupling branch 421 extends in the same direction relative to the second vertical section 210 and is coupled with the second vertical section 210, and the second horizontal coupling branch 422 extends in the opposite direction relative to the second horizontal section 220 and is coupled with the second horizontal section 220.

[0179] In some embodiments of the present application, the length dimension of the first coupling structure 410 (or the second coupling structure 420) ranges from 0.25 to 0.5 times the wavelength of the highest carrier frequency. The length dimension of the first coupling structure 410 refers to the dimension of the end of the first vertical coupling branch 411 extending through the first vertical coupling branch 411 and the first horizontal coupling branch 412 to the end of the first horizontal coupling branch 412.

[0180] It can be understood that the matching relationship of the first coupling structure 410 and the first radiator 100 is limited to the coupling relationship between the first vertical coupling branch 411 and the first vertical section 110, whether the end of the first vertical coupling branch 411 and the end of the first vertical section 110 point to the same direction, and the coupling relationship between the first horizontal coupling branch 412 and the first horizontal section 120, whether the end of the first horizontal coupling branch 412 and the end of the first horizontal section 120 point to the opposite direction. That is, the specific structure of the first coupling structure 410 and the first radiator 100, and the relative position of each part in the structure are not limited in the present application.

[0181] In addition, the present application only describes the relative position of the first coupling structure 410, the first coupling structure 420, the first radiator 100 and the first radiator 200. The coupling distance between the aforementioned components, the coupling area of the components, and other parameters can be adjusted according to the required coupling strength between the aforementioned components, which are not limited in the present application.

[0182] In order to facilitate the description of the relative position relationship between the coupling body 400 and the first radiator 100 and the second radiator 200, the intersection between the first horizontal section 120 and the second horizontal section 220 is defined as the intersection point, and the four areas formed by the first horizontal section 120 and the second horizontal section 220 around the intersection point are defined as the first quadrant A1, the second quadrant A2, the third quadrant A3 and the fourth quadrant A4 in turn. The first quadrant is the area formed between the first horizontal section 120 on the same side of the intersection point as the first vertical section 110 and the second horizontal section 220 on the same side of the intersection point as the second vertical section 210. The third quadrant A3 is the area opposite to the first quadrant A1. The second quadrant A2 and the fourth quadrant A4 form a quadrant.

[0183] A coupling body 400 will be described in detail below. As shown in Figure 7 The coupling body 400 includes a first coupling structure 410 and a second coupling structure 420 arranged symmetrically at 90°, and a first connecting structure 430. The side of the first vertical coupling branch 411 in the first coupling structure 410 and the side of the second vertical coupling branch 421 in the second coupling structure 420 are connected by the first connecting structure 430.

[0184] In some implementations, in order to facilitate installation, an installation space (for example Figure 7 the space on the upper part of the first connecting structure 430) is provided between the end of the first vertical coupling branch 411 close to the first horizontal coupling branch 412 and the end of the second vertical coupling branch 421 close to the second horizontal coupling branch 422.

[0185] As shown in Figure 7As shown, in some embodiments of the present application, in order to improve the structural strength of the coupling body 400 and the coupling strength between the coupling body 400 and the reflecting element 300, the coupling body 400 further comprises a second connecting structure 440 parallel to the first surface of the reflecting element 300, and thus the coupling body 400 is also referred to as a Y-shaped structure. The second connecting structure 440 is connected to the first coupling structure 410, the second coupling structure 420 and the second connecting structure 430 respectively. It can be understood that the first connecting structure 430 can be coupled to the first vertical section 110 and the second vertical section 210 respectively, and the second connecting structure 440 can be coupled to the reflecting element 300.

[0186] When the second connecting structure 440 is included in the coupling body 400, the length dimension of the first coupling structure 410 can refer to the dimension of the first vertical coupling branch 411 extending from the center point opposite to the end of the first vertical coupling branch 411 to the end of the first horizontal coupling branch 412 through the first vertical coupling branch 411 and the first horizontal coupling branch 412. The center point can be Figure 7 P5 in FIG. 5.

[0187] In some implementations of the present application, the length dimension of the first coupling structure 410 (or the second coupling structure 420) ranges from 0.25 to 0.5 times the wavelength of the highest carrier frequency. The length dimension of the first coupling structure 410 refers to the dimension of the first vertical coupling branch 411 extending from the end of the first vertical coupling branch 411 to the end of the first horizontal coupling branch 412 through the first vertical coupling branch 411 and the first horizontal coupling branch 412, and the length dimension of the second coupling structure 420 refers to the dimension of the second vertical coupling branch 421 extending from the end P5 of the second vertical coupling branch 421 to the end P6 of the second horizontal coupling branch 422 through the second vertical coupling branch 421 and the second horizontal coupling branch 422, as shown by the third dashed line l3 in FIG. 5. Figure 7

[0188] In some embodiments of the present application, the above-mentioned antenna unit 10 further comprises a director sheet 700. The director sheet 700 is arranged on the side of the first radiator 100 and the second radiator 200 away from the reflecting element 300, and the director sheet 700 is provided with a first through slot and a second through slot arranged in a cross manner. The extension direction of the first through slot is between the second direction and the third direction, and the extension direction of the second through slot is between the reverse direction of the second direction and the reverse direction of the third direction. The director sheet 700 in the above-mentioned antenna unit 10 can improve the current balance in the first radiator 100 and the second radiator 200, so that the directivity pattern converges symmetrically.

[0189] In some implementations of the present application, the director sheet 700 is made of metal.

[0190] ​To further improve the coupling strength with the first vertical section 110 and the second vertical section 210, and to further reduce the radiation intensity of the first vertical section 110 and the second vertical section 210, in some embodiments of the present application, the antenna unit 10 further comprises a metal column 800. In some implementations of the present application, the size of the metal column 800 in the vertical direction is less than or equal to 0.25 times the wavelength of the highest carrier frequency. The suppression of the current radiation in the vertical direction in the above-mentioned antenna unit 10 reduces the horizontal radiation, and further reduces the cross-polarization of the monopole.

[0191] To further improve the coupling strength with the first vertical section 110 and the second vertical section 210, and to further reduce the radiation intensity of the first vertical section 110 and the second vertical section 210, in some embodiments of the present application, the antenna unit 10 further comprises a metal column 800. In some implementations of the present application, the size of the metal column 800 in the vertical direction is less than or equal to 0.25 times the wavelength of the highest carrier frequency. The suppression of the current radiation in the vertical direction in the above-mentioned antenna unit 10 reduces the horizontal radiation, and further reduces the cross-polarization of the monopole.

[0192] In some implementations of the present application, the metal column 800 is made of metal.

[0193] In some implementations of the present application, in the vertical direction, the bottom surface of the metal column 800 is flush with the bottom surface of the first radiator 100 and the second radiator 200, and the size of the metal column 800 in the vertical direction is less than or equal to 0.25 times the wavelength of the highest carrier frequency.

[0194] In some implementations of the present application, the horizontal coupling branch 412 of the first coupling structure 410 is coupled with the first section of the first horizontal section 120 of the first radiator 100, wherein the first section is the part of the first horizontal section 120 of the first radiator 100 between one end 1201 of the first horizontal section 120 and the intersection. The second horizontal coupling branch 422 of the second coupling structure 420 is coupled with the second section of the second horizontal section 220 of the second radiator 200, wherein the second section is the part of the second horizontal section 220 of the second radiator 200 between one end 2201 of the second horizontal section 220 and the intersection.

[0195] Figure 8Fig. 1 shows a top view of the antenna unit according to some embodiments of the present application, in which the first radiator 100, the second radiator 200, the reflecting element 300 and the coupling body 400 are assembled.

[0196] As shown in Fig. 1, the coupling body 400 is distributed in the first quadrant A1, the second quadrant A2 and the fourth quadrant A4. The first coupling structure 410 is located in the fourth quadrant A4, and the second coupling structure 420 is located in the second quadrant A2. The first connecting structure 430 extends from the bottom of the first horizontal section 120 and the second horizontal section 220, from the second quadrant A2 to the fourth quadrant A4. The second connecting structure 440 is distributed in the first quadrant A1, the second quadrant A2 and the fourth quadrant A4. Figure 8 In some implementations, the first horizontal coupling branch 412 of the first coupling structure 410 is located in the fourth quadrant A4, and the second horizontal coupling branch 422 of the second coupling structure 420 is located in the second quadrant A2. The coupling body in the above-mentioned antenna unit can further optimize the coupling between the first vertical coupling branch 411 and the first vertical section 110, and the coupling between the second vertical coupling branch 421 and the second vertical section 210, based on the arrangement position of the first horizontal coupling branch 412 and the second horizontal coupling branch 422.

[0197] The coupling body 400 is electrically connected with the reflecting element 300. The coupling body 400 and the reflecting element 300 can be connected or not connected, and the connection mode of the coupling body 400 and the reflecting element 300 can be that the coupling body 400 and the reflecting element 300 are directly connected, or the coupling body 400 and the reflecting element 300 are coupled and connected, which is not limited in the present application.

[0198] In some implementations, the first horizontal coupling branch 412 of the first coupling structure 410 and the second horizontal coupling branch 422 of the second coupling structure 420 are located in the first quadrant A1. The coupling body structure in the above-mentioned antenna unit is simple and convenient to install.

[0199] In some implementations, the first vertical coupling branch 411 of the first coupling structure 410 and the second vertical coupling branch 421 of the second coupling structure 420 are also located in the first quadrant A1.

[0200] In some implementations, the first horizontal coupling branch 412 of the first coupling structure 410 and the second horizontal coupling branch 422 of the second coupling structure 420 are located in the third quadrant A3.

[0201] In some implementations, the first vertical coupling branch 411 of the first coupling structure 410 and the second vertical coupling branch 421 of the second coupling structure 420 are also located in the third quadrant A3.

[0202] In some implementations, the first horizontal coupling branch 412 of the first coupling structure 410 and the second horizontal coupling branch 422 of the second coupling structure 420 are located in the third quadrant A3.

[0203] It can be understood that the foregoing implementation modes are only simple enumeration of several relatively symmetrical layout modes of the first coupling structure and the second coupling structure, and those which are not symmetrical are also within the protection scope of the present application. For example, the first horizontal coupling branch of the first coupling structure is located in the first quadrant, the second horizontal coupling branch of the second coupling structure is located in the second quadrant, for another example, the first horizontal coupling branch of the first coupling structure is located in the fourth quadrant, the second horizontal coupling branch of the second coupling structure is located in the first quadrant, and so on. The present application does not describe them one by one.

[0204] Another coupling body 400a will be described in detail below. As shown in Figure 9 , different from the coupling body 400 in Figure 8 , the coupling body 400a comprises a first coupling structure 410a and a second coupling structure 420a which are arranged in 90° symmetry, and a second connecting structure 440a. The bottom of the first vertical coupling branch 411a in the first coupling structure 410a and the bottom of the second vertical coupling branch 421a in the second coupling structure 420a are connected through the second connecting structure 440a, and the second connecting structure 440a can be coupled with the reflecting element 300.

[0205] In some implementation modes of the present application, the length dimension of the first coupling structure 410a (or the second coupling structure 420a) ranges from 0.25 times to 0.5 times the wavelength of the highest carrier frequency. The length dimension of the first coupling structure 410a refers to the dimension of the first vertical coupling branch 411a at the end of the first vertical coupling branch 411a extending to the end of the first horizontal coupling branch 412a through the first vertical coupling branch 411a and the first horizontal coupling branch 412a, and the length dimension of the second coupling structure 420a refers to the dimension of the second vertical coupling branch 421a at the end P 5a of the second vertical coupling branch 421a extending to the end P 6a of the second horizontal coupling branch 422a through the second vertical coupling branch 421a and the second horizontal coupling branch 422, as shown by the third dotted line l 3a in Figure 9 .

[0206] Fig. 10(a) shows a top view of the first radiator 100a, the second radiator 200a, the reflecting element 300 and the coupling body 400a after assembly in some embodiments of the present application. The second radiator 200a is similar in structure to the first radiator 100a, and will not be described here. Fig. 10(b) shows a perspective view of the first radiator 100a, the second radiator 200a, the reflecting element 300 and the coupling body 400a after assembly in some embodiments of the present application. Fig. 10(c) shows a side view of the first radiator 100a, the second radiator 200a, the reflecting element 300 and the coupling body 400a after assembly in some embodiments of the present application.

[0207] Depend on Figures 10(a) to 10(c) It can be seen that the coupler 400a is distributed in the first quadrant A1. That is, the coupler 400a is distributed in one of the included angles formed by the first radiator 100a and the second radiator 200a.

[0208] This application also provides an antenna array, which includes at least one set of antenna elements 10 as described above, and these antenna elements 10 are arrayed.

[0209] Regarding the arrangement of the radiators (first radiator 100 and second radiator 200) in antenna element 10 on reflective element 300, on the one hand, to ensure the directivity of antenna 1, as shown in Figures 11(a) and 11(b), the radiators in antenna element 10 are mounted on the same side of reflective element 300. For example, if reflective element 300 has a flat plate structure, the radiators can be mounted on the upper surface of reflective element 300; or, for example, the radiators can be mounted on the lower surface of reflective element 300. This application does not impose specific limitations on this comparison. On the other hand, to achieve miniaturization of antenna 1, the radiators are densely arrayed on the same surface of reflective element 300.

[0210] Meanwhile, as shown in Figure 11(b), due to the different height dimensions of the high-frequency unit 10a and the low-frequency unit 10b, the high-frequency radiators 11a in the high-frequency unit 10a and the low-frequency radiators 11b in the low-frequency unit 10b are arranged in an interlaced and staggered manner on the same surface of the reflective element 300 to increase the density. Interlacing refers to the alternating distribution of rows of high-frequency radiators 11a in the high-frequency unit 10a and rows of low-frequency radiators 11b in the low-frequency unit 10b. Staggered distribution means that the orthographic projection of the low-frequency radiators 11b in the low-frequency unit 10b onto one surface of the reflective element 300 at least partially falls within the orthographic projection of the high-frequency radiators 11a in the high-frequency unit 10a surrounding the low-frequency unit 10b onto one surface of the reflective element 300 (as shown in Figure 11(a)). The height dimension refers to the dimension of the radiator in the normal direction of the reflective element 300 surface (e.g., the dimension of the radiator along the Z-axis in Figures 2(b) and 11(b)).

[0211] It is understood that the dense array of high-frequency unit 10a and low-frequency unit 10b shown in Figures 11(a) and 11(b) is only a few examples in this application. Any array method that can densely array the radiator 11 is within the protection scope of this application. This application does not specifically limit the specific array method of the radiator 11.

[0212] Fig. 11(c) shows a schematic diagram of the distribution of the antenna unit 10 in some embodiments of the present application. In some dense array scenarios of the present application, the antenna unit 10 comprises the array-distributed high-frequency unit 10a, and the low-frequency unit 10b superimposed with the high-frequency unit 10a. As shown in Fig. 11(c), the orthographic projection of the radiator 11b in the low-frequency unit 10b on the reflecting element 300 at least partially falls into the orthographic projection of the radiator 11a in the four high-frequency units 10a on the reflecting element 300.

[0213] Figure 12 Fig. 11(c) shows a schematic diagram of the distribution of the antenna unit 10 in some embodiments of the present application. In some dense array scenarios of the present application, the antenna unit 10 comprises the array-distributed high-frequency unit 10a, and the low-frequency unit 10b superimposed with the high-frequency unit 10a. As shown in Fig. 11(c), the orthographic projection of the radiator 11b in the low-frequency unit 10b on the reflecting element 300 at least partially falls into the orthographic projection of the radiator 11a in the four high-frequency units 10a on the reflecting element 300. Figure 12 As shown in Fig. 11(c), the present application achieves decoupling of the high-frequency unit 10a in the low-frequency band, so that in the dense array scenario shown in Fig. 11(c), the low-frequency unit 10b is not affected by the high-frequency unit 10a, and the main lobe of the directional diagram of the low-frequency unit 10b is smooth without obvious gain drop. The directivity of the antenna refers to the different radiation or receiving capabilities of the antenna in different directions in space, and the smooth main lobe of the directional diagram of the low-frequency unit 10b represents that the radiation field of the low-frequency unit 10b is not significantly affected by the radiation field of the high-frequency unit 10a. In addition, under the same conditions, the higher the gain of the radiation unit of the antenna, the farther the electromagnetic wave propagates, that is, the better the performance of the antenna.

[0214] Figure 13 Fig. 11(c) shows a schematic diagram of the distribution of the antenna unit 10 in some embodiments of the present application. In some dense array scenarios of the present application, the antenna unit 10 comprises the array-distributed high-frequency unit 10a, and the low-frequency unit 10b superimposed with the high-frequency unit 10a. As shown in Fig. 11(c), the orthographic projection of the radiator 11b in the low-frequency unit 10b on the reflecting element 300 at least partially falls into the orthographic projection of the radiator 11a in the four high-frequency units 10a on the reflecting element 300. Figure 13 As shown in Fig. 11(c), the present application achieves decoupling of the high-frequency unit 10a in the low-frequency band, so that in the dense array scenario shown in Fig. 11(c), the low-frequency unit 10b is not affected by the high-frequency unit 10a, and the main lobe of the directional diagram of the low-frequency unit 10b is smooth without obvious gain drop. The directivity of the antenna refers to the different radiation or receiving capabilities of the antenna in different directions in space, and the smooth main lobe of the directional diagram of the low-frequency unit 10b represents that the radiation field of the low-frequency unit 10b is not significantly affected by the radiation field of the high-frequency unit 10a. In addition, under the same conditions, the higher the gain of the radiation unit of the antenna, the farther the electromagnetic wave propagates, that is, the better the performance of the antenna.

[0215] The present application also provides an antenna array, which comprises any one of the antenna arrays described above.

[0216] The present application also provides a kind of antenna feeder system, which comprises any one of the antennas described above.

[0217] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

[0218] The above description merely illustrates the generic principles of the application. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described or shown herein, embody the principles of the application and are thus within its spirit and scope. In addition, it is understood that the application is not limited to the embodiments described herein, but that it includes all alternatives and modifications that fall within the scope of the claims.

[0219] It should be noted that in the description of the application, similar reference numerals and letters in different drawings represent similar elements, so once an element is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0220] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0221] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0222] In the description of the present application, it should be understood that, in the present application, "electrical connection" can be understood as physical contact and electrical conduction of components; it can also be understood as a form of connection between different components in a circuit structure through a physical line that can transmit electrical signals, such as a copper foil or a wire of a printed circuit board (PCB). "Coupled by" can be understood as electrical conduction in space through indirect coupling. Indirect coupling can be understood as contactless coupling, wherein those skilled in the art can understand that the coupling phenomenon refers to the phenomenon that the input and output of two or more circuit components or electrical networks are closely matched and interact with each other, and energy is transmitted from one side to the other side through interaction. In order to make the purpose, technical scheme and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

Claims

1. An antenna unit, characterized by The antenna unit comprises a reflecting element, two radiators located on the same side of the reflecting element, and two coupling structures respectively coupled with the two radiators, wherein each of the two radiators is coupled with a feeding source through a coupling feed; Each of the two radiators comprises a vertical segment extending along a vertical direction and a horizontal segment extending along a horizontal direction, one end of the vertical segment is connected with one end of the horizontal segment, and the horizontal segments of the two radiators are arranged in a cross manner, wherein the vertical direction intersects with a surface of the reflecting element, and the vertical direction intersects with the horizontal direction; Each of the two coupling structures comprises a horizontal coupling branch and a vertical coupling branch, one end of the horizontal coupling branch is connected with one end of the vertical coupling branch, the vertical coupling branch is coupled with the vertical segment and extends in the same direction relative to the vertical segment, the horizontal coupling branch is coupled with the horizontal segment and extends in the opposite direction relative to the horizontal segment, and the vertical coupling branch is electrically connected with the reflecting element.

2. The antenna unit of claim 1, wherein, The horizontal segments of the two radiators are arranged in a perpendicular cross manner, the vertical direction is perpendicular to the horizontal direction, and the vertical direction is perpendicular to the surface of the reflecting element.

3. The antenna unit of claim 1 or 2, wherein one of the horizontal coupling branches of the two coupling structures is coupled with a first segment of the horizontal segment of one of the two radiators, wherein the first segment is a part of the horizontal segment of one of the two radiators between the one end of the horizontal segment and a cross point; the other of the horizontal coupling branches of the two coupling structures is coupled with a second segment of the horizontal segment of the other of the two radiators, wherein the second segment is a part of the horizontal segment of the other of the two radiators between the one end of the horizontal segment and the cross point.

4. The antenna unit of claim 3, wherein, The horizontal segments of the two radiators cross to form four quadrants, and the horizontal coupling branches of the two coupling structures are located in the same quadrant.

5. The antenna unit of claim 3, wherein, The horizontal segments of the two radiators cross to form four quadrants, and the horizontal coupling branches of the two coupling structures are located in opposite quadrants.

6. The antenna unit of claim 1, wherein in each of the two radiators, the other end of the vertical segment is a feeding end of the radiator; or each of the two radiators further comprises a transition segment, one end of the transition segment is connected with the vertical segment, and in each of the two radiators, the other end of the transition segment is a feeding end of the radiator.

7. The antenna unit of any one of claims 1 to 6, wherein the vertical segment in each of the two radiators comprises a first sub-vertical segment, a second sub-vertical segment, and a sub-horizontal segment coupled with the horizontal segment; wherein one end of the first sub-vertical segment is connected with the one end of the horizontal segment, the other end of the first sub-vertical segment is connected with one end of the sub-horizontal segment, and the other end of the sub-horizontal segment is connected with one end of the second sub-vertical segment.

8. The antenna unit of any one of claims 1 to 7, wherein, The radiator further comprises a balance segment extending in the opposite direction relative to the horizontal segment from the one end of the horizontal segment.

9. The antenna unit of any one of claims 1 to 8, wherein, The two coupling structures are connected with each other.

10. The antenna unit of any one of claims 1-9, wherein, each of the radiators has a length ranging from 0.25 to 0.75 times a wavelength of a highest carrier frequency, wherein the length of each of the radiators is a dimension from a feed-in end of the radiator to the other end of the horizontal section of the radiator.

11. The antenna unit of any one of claims 1 to 10, wherein, each of the coupling structures has a length ranging from 0.25 to 0.5 times the wavelength of the highest carrier frequency, wherein the length of each of the coupling structures is a dimension from the other end of the vertical coupling branch to the other end of the horizontal coupling branch.

12. The antenna unit of any one of claims 1 to 11, wherein, The antenna unit further comprises a feed-in strip electrically connected to the feed-in network.

13. The antenna unit of any one of claims 1 to 12, wherein, The vertical coupling branch of each of the coupling structures is electrically connected to the reflecting element.

14. The antenna unit of any one of claims 1 to 13, wherein, The antenna unit further comprises a metal post configured to cancel the radiation of the two radiators in a direction perpendicular to the vertical direction.

15. The antenna unit of claim 14, wherein, In the vertical direction, a surface of the metal post facing the reflecting element is flush with a surface of the feed-in end of the radiators facing the reflecting element, and a dimension of the metal post in the vertical direction is less than or equal to 0.25 times the wavelength of the highest carrier frequency.

16. The antenna unit of any one of claims 1 to 15, wherein, The antenna unit further comprises a directing sheet disposed on a side of the two radiators facing away from the reflecting element.

17. The antenna unit of claim 16, wherein, The directing sheet has crosswise arranged through-slots, and an extension direction of the through-slots forms an angle of 45° with the horizontal direction.

18. The antenna unit of any one of claims 1-17, wherein, the horizontal section of one of the radiators has a first clearance groove disposed on a side facing away from the vertical section, the horizontal section of the other of the radiators is accommodated in the first clearance groove of the horizontal section of one of the radiators.

19. The antenna unit of claim 18, wherein, the horizontal section of the other of the radiators has a second clearance groove disposed on a side facing the vertical section, when the first clearance groove of the horizontal section of one of the radiators is snapped into the second clearance groove of the horizontal section of the other of the radiators, the surfaces of the horizontal sections of the two radiators facing away from the reflecting element are in the same plane.

20. An antenna, characterized by An antenna comprising at least one antenna unit as claimed in any one of claims 1-19, wherein the at least one antenna unit is arranged in an array.

21. A system of antennas and feeds, characterized in that, An antenna as claimed in claim 20.

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