Multi-frequency radiating element and array antenna

Abstract

The application relates to a multi-frequency radiation unit and an array antenna. The multi-frequency radiation unit comprises: a low-frequency vibrator of a low-frequency radiation unit supported on a first side of a reflecting plate through a low-frequency feed, the low-frequency feed feeds the low-frequency vibrator, four low-frequency radiation arms of the low-frequency vibrator are parallel to a first side surface of the reflecting plate, and the four low-frequency radiation arms form a cross shape to form four included angle regions; four high-frequency radiation units are correspondingly distributed in the four included angle regions; a high-frequency vibrator of the high-frequency radiation unit is supported on the first side of the reflecting plate through a high-frequency feed, the high-frequency feed feeds the high-frequency vibrator, a high-frequency radiation surface of the high-frequency vibrator is parallel to the first side surface of the reflecting plate, the distance between the high-frequency radiation surface and the low-frequency radiation arm in the direction perpendicular to the first side surface is less than one-quarter of the wavelength of the high-frequency vibrator, and a grounding substrate is arranged between the high-frequency vibrator and the reflecting plate and is parallel to the high-frequency radiation surface. The multi-frequency radiation unit of the application reduces the inter-frequency mutual coupling and is not limited by the high-frequency bandwidth.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, in particular to a multi-frequency radiating unit and an array antenna. BACKGROUND

[0002] In order to adapt to the development and needs of mobile communication technology, multi-band antennas appear. The multi-band antenna usually includes at least one low-frequency vibrator and at least one high-frequency vibrator, the low-frequency vibrator and the high-frequency vibrator respectively work in different frequency bands, and there is electromagnetic coupling interference between different frequency bands, which will deteriorate the performance of the multi-band antenna.

[0003] In the related art, some multi-band antennas adopt a nesting scheme, in which the high-frequency vibrator is nested inside the die-cast bowl-shaped low-frequency vibrator to reduce the interference effect of the low-frequency vibrator on the high-frequency vibrator; however, in the nesting scheme, only one high-frequency vibrator can be arranged in the size range of one low-frequency vibrator, and the vibrator body needs to be opened and plated, and the installation process is relatively complex, and the weight and cost are relatively high. Some multi-band antennas also adopt a PCB filter vibrator, which loads a decoupling structure at the segmented part of the radiation arm of the low-frequency vibrator to block the high-frequency induced current from flowing through, or forms two equal and opposite induced currents that can offset each other to achieve the filtering effect of low frequency on high frequency; however, the transmission characteristics of the decoupling structure loaded on the low-frequency array are not perfect, and the current or electromagnetic field cannot pass completely in the non-working frequency band, and the decoupling structure makes it difficult to design the impedance matching of the low-frequency vibrator, which needs to be designed for different high-frequency frequency bands, and a single low-frequency vibrator can only be designed to filter high frequency for part of the frequency band, resulting in limited bandwidth of the high-frequency vibrator. SUMMARY

[0004] The purpose of the present application is to provide a multi-frequency radiating unit and an array antenna, which aims to solve the problems of multi-frequency fusion antenna inter-frequency mutual coupling and limited high-frequency bandwidth.

[0005] In a first aspect, the present application provides a multi-frequency radiating unit, comprising:

[0006] a reflector plate;

[0007] a low-frequency radiating unit including a low-frequency vibrator and a low-frequency feed, the low-frequency vibrator being supported and arranged on a first side of the reflector plate through the low-frequency feed, the low-frequency feed being used to feed the low-frequency vibrator, the low-frequency vibrator including four low-frequency radiation arms parallel to the surface of the first side of the reflector plate, the four low-frequency radiation arms being symmetrically distributed at the center and forming a cross shape, the low-frequency vibrator in the cross shape forming four angle regions;

[0008] Four high-frequency radiation units are distributed in the four angle areas in a one-to-one correspondence; the high-frequency radiation unit includes a high-frequency vibrator, a high-frequency feeding element and a grounding substrate, the high-frequency vibrator is supported by the high-frequency feeding element and is arranged on the first side of the reflecting plate, the high-frequency feeding element is used to feed the high-frequency vibrator, the high-frequency vibrator includes a high-frequency radiation surface, the high-frequency radiation surface is parallel to the surface of the first side of the reflecting plate, and the distance between the high-frequency radiation surface and the low-frequency radiation arm in the direction perpendicular to the first side surface is less than one-quarter wavelength of the high-frequency vibrator, the grounding substrate is arranged on the high-frequency feeding element and is located between the high-frequency vibrator and the reflecting plate, and the grounding substrate is parallel to the high-frequency radiation surface.

[0009] In some embodiments, the low-frequency radiation unit further includes a low-frequency dielectric substrate and a low-frequency base, the low-frequency base is fixedly disposed on the reflector, one end of the low-frequency feeding element is fixedly connected to the low-frequency base, the low-frequency dielectric substrate is fixedly connected to the other end of the low-frequency feeding element away from the reflector, and the low-frequency dielectric substrate is parallel to the surface of the first side of the reflector; the four low-frequency radiation arms are disposed on the surface of the low-frequency dielectric substrate facing away from the reflector, and a ground layer is provided on the surface of the low-frequency dielectric substrate facing the reflector.

[0010] In some embodiments, the high-frequency radiation unit also includes a high-frequency dielectric substrate and a high-frequency base, the high-frequency base is fixedly arranged on the reflective plate, one end of the high-frequency feeder is fixedly connected to the high-frequency base, the high-frequency dielectric substrate is fixedly connected to the other end of the high-frequency feeder away from the reflective plate, and the high-frequency dielectric substrate is parallel to the surface of the first side of the reflective plate; the high-frequency radiation surface is arranged on the side surface of the high-frequency dielectric substrate facing away from the reflective plate, and a ground layer is provided on the side surface of the high-frequency dielectric substrate facing the reflective plate.

[0011] In some embodiments, the low-frequency dielectric substrate and the high-frequency dielectric substrate are independently provided; or, the low-frequency dielectric substrate and at least one of the high-frequency dielectric substrates are fixedly connected as one body.

[0012] In some embodiments, the low-frequency feed includes a low-frequency balun substrate, a low-frequency feed balun disposed on one side surface of the low-frequency balun substrate, and a low-frequency balun ground disposed on the opposite side surface of the low-frequency balun substrate; the low-frequency feed includes two, one of the low-frequency feed baluns of the two low-frequency feeds is electrically connected to two oppositely arranged low-frequency radiation arms, the other of the low-frequency feed baluns of the two low-frequency feeds is electrically connected to the other two oppositely arranged low-frequency radiation arms, and the low-frequency balun grounds of the two low-frequency feeds are electrically connected to the ground layer of the low-frequency dielectric substrate; wherein the two low-frequency feeds are both vertically connected between the low-frequency dielectric substrate and the low-frequency base, and the two low-frequency feeds are arranged perpendicularly and cross each other.

[0013] In some embodiments, the high-frequency feed includes a high-frequency balun substrate, a high-frequency feed balun disposed on one side surface of the high-frequency balun substrate, and a high-frequency balun ground disposed on the opposite side surface of the high-frequency balun substrate; the high-frequency feed includes two, one of the high-frequency feed baluns of the two high-frequency feeds is electrically connected to one polarization of the high-frequency radiation surface, the other of the high-frequency feed baluns of the two high-frequency feeds is electrically connected to the other polarization of the high-frequency radiation surface, and the high-frequency balun grounds of the two high-frequency feeds are electrically connected to the ground layer of the high-frequency dielectric substrate; wherein the two high-frequency feeds are both vertically connected between the high-frequency dielectric substrate and the high-frequency base, and the two high-frequency feeds are arranged perpendicularly and cross each other.

[0014] In some embodiments, the four high-frequency radiation units have the same operating frequency band; or, at least one of the high-frequency radiation units has a different operating frequency band.

[0015] In a second aspect, the present application provides an array antenna, which includes the multi-frequency radiation unit of any one of the embodiments of the first aspect.

[0016] In some embodiments, the array antenna comprises a plurality of the multi-frequency radiating units arranged in a first direction, and the plurality of the multi-frequency radiating units share a reflecting plate, wherein four high-frequency radiating units of each of the multi-frequency radiating units are distributed in two columns in a second direction, the two columns of the high-frequency radiating units are located on opposite sides of a low-frequency radiating unit in the second direction, two high-frequency radiating units in each column are arranged in alignment in the first direction and have the same frequency band, the first direction and the second direction are both parallel to the surface of the first side of the reflecting plate, and the first direction and the second direction are perpendicular to each other; the array antenna further comprises a plurality of single-frequency radiating units, at least two single-frequency radiating units are arranged between two adjacent multi-frequency radiating units in the first direction, the at least two single-frequency radiating units are arranged in alignment with the two columns of high-frequency radiating units in the first direction, and the frequency band of each single-frequency radiating unit is the same as that of the high-frequency radiating units arranged in alignment in the first direction.

[0017] In some embodiments, the frequency bands of the four high-frequency radiating units of the plurality of the multi-frequency radiating units are the same.

[0018] In some embodiments, the frequency bands of the two columns of high-frequency radiating units of the multi-frequency radiating unit are different.

[0019] The multi-frequency radiating unit and the array antenna can flexibly adjust the relative positions of the high-frequency radiation surface and the low-frequency radiation arm and the spacing therebetween according to the high-frequency bandwidth requirement, effectively reduce the effect of inter-frequency mutual coupling, and make the high-frequency bandwidth not limited, thereby solving the problem of limited high-frequency bandwidth. The ground substrate can form a radiation environment in which the high-frequency vibrator and the low-frequency vibrator are independent of each other, and the height difference between the high-frequency radiation surface and the low-frequency radiation arm is within the range of one-quarter wavelength of the high-frequency vibrator, which can greatly reduce the interference between vibrators of different frequency bands, effectively realize decoupling between the high-frequency vibrator and the low-frequency vibrator, and realize stable patterns of the high-frequency vibrator and the low-frequency vibrator in their respective frequency bands without increasing external circuits. The design is simple, the loss is small, the efficiency is high, the multi-frequency fusion, antenna miniaturization and light weight are realized, and the performance of the multi-frequency band antenna is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 Perspective view of a multi-band radiating element for some embodiments of the application.

[0022] Figure 2 Front view of a multi-band radiating element for some embodiments of the application.

[0023] Figure 3 Top view of a multi-band radiating element for some embodiments of the application.

[0024] Figure 4 Perspective view of a multi-band radiating element for some embodiments of the application.

[0025] Figure 5 Front view of a multi-band radiating element for some embodiments of the application.

[0026] Figure 6 Perspective view of a multi-band radiating element for some embodiments of the application.

[0027] Figure 7 Perspective view of a multi-band radiating element for some embodiments of the application.

[0028] Figure 8 Perspective view of a multi-band radiating element for some embodiments of the application.

[0029] Figure 9 Perspective view of a multi-band radiating element for some embodiments of the application.

[0030] Figure 10 Front view of a multi-band radiating element for some embodiments of the application.

[0031] Figure 11 Left view of a multi-band radiating element for some embodiments of the application.

[0032] Figure 12 Top view of a multi-band radiating element for some embodiments of the application.

[0033] Figure 13 Perspective view of a multi-band radiating element for some embodiments of the application.

[0034] Figure 14 Front view of a multi-band radiating element for some embodiments of the application.

[0035] Figure 15 Top view of a multi-band radiating element for some embodiments of the application.

[0036] Figure 16 Perspective view of an array antenna for some embodiments of the application.

[0037] Figure 17 Structure diagram of array antenna for another embodiment of the present application.

[0038] Reference signs:

[0039] 100, multi-frequency radiating unit; 1, reflector plate; 11, first side; 2, low-frequency radiating unit; 21, low-frequency vibrator; 211, low-frequency radiating arm; 2111, sub-arm; 2112, connecting part; 212, included angle area; 22, low-frequency feeding part; 221, low-frequency balun substrate; 222, low-frequency feeding balun; 23, low-frequency dielectric substrate; 24, low-frequency pedestal; 3, high-frequency radiating unit; 31, high-frequency vibrator; 311, high-frequency radiating surface; 32, high-frequency feeding part; 321, high-frequency balun substrate; 322, high-frequency feeding balun; 33, ground substrate; 34, high-frequency dielectric substrate; 35, high-frequency pedestal; 36, first high-frequency radiating unit; 37, second high-frequency radiating unit;

[0040] 200, single-frequency radiating unit; 201, first single-frequency radiating unit; 202, second single-frequency radiating unit;

[0041] 1000, array antenna. DETAILED DESCRIPTION

[0042] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 present application and simplifying the description, and therefore cannot be understood as indicating or implying 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 limiting the present application.

[0044] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0047] It should be noted that an element referred to as "fixed to" or "provided on" another element can be directly on another element or can exist with a middle element. An element is considered to be "connected" to another element, which can be directly connected to another element or can exist with a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for the purpose of description, and do not represent the only implementation.

[0048] Referring to Figures 1 to 5 , Figure 1 shows a perspective structural schematic diagram of a multi-frequency radiation unit in some embodiments of the present application, Figure 2 shows a front view of a multi-frequency radiation unit in some embodiments of the present application, Figure 3 shows a top view of a multi-frequency radiation unit in some embodiments of the present application, Figure 4 shows a perspective structural schematic diagram of a multi-frequency radiation unit in some embodiments of the present application, Figure 5A front view of a multi-frequency radiating unit in some embodiments of the present application is shown. The multi-frequency radiating unit 100 provided by the embodiments of the present application includes a reflecting plate 1, a low-frequency radiating unit 2, and four high-frequency radiating units 3. The low-frequency radiating unit 2 includes a low-frequency radiator 21 and a low-frequency feed 22. The low-frequency radiator 21 is supported by the low-frequency feed 22 and disposed on a first side 11 of the reflecting plate 1. The low-frequency feed 22 is configured to feed power to the low-frequency radiator 21. The low-frequency radiator 21 includes four low-frequency radiating arms 211. The low-frequency radiating arms 211 are parallel to the surface of the first side 11 of the reflecting plate 1. The four low-frequency radiating arms 211 are symmetrically distributed at the center and form a cross shape. The cross-shaped low-frequency radiator 21 forms four corner regions 212. The four high-frequency radiating units 3 are correspondingly distributed in the four corner regions 212. Each high-frequency radiating unit 3 includes a high-frequency radiator 31, a high-frequency feed 32, and a grounding substrate 33. The high-frequency radiator 31 is supported by the high-frequency feed 32 and disposed on the first side 11 of the reflecting plate 1. The high-frequency feed 32 is configured to feed power to the high-frequency radiator 31. The high-frequency radiator 31 includes a high-frequency radiating surface 311. The high-frequency radiating surface 311 is parallel to the surface of the first side 11 of the reflecting plate 1. In the direction Z perpendicular to the surface of the first side 11, the distance between the high-frequency radiating surface 311 and the low-frequency radiating arms 211 is less than one-quarter of the wavelength of the high-frequency radiator 31. The grounding substrate 33 is disposed on the high-frequency feed 32 and between the high-frequency radiator 31 and the reflecting plate 1. The grounding substrate 33 is parallel to the high-frequency radiating surface 311.

[0049] The low-frequency radiator 21 has a symmetric center. The four low-frequency radiating arms 211 are rotationally symmetrically distributed around the symmetric center of the low-frequency radiator 21 with a period of 90°. Each low-frequency radiating arm 211 includes two sub-arms 2111 arranged at an angle of 90°. The two sub-arms 2111 are fixedly connected at one end by a connecting portion 2112 and longitudinally extend in a direction away from the connecting portion 2112 at the other end. One of the sub-arms 2111 of one of the low-frequency radiating arms 211 is parallel to and spaced apart from the sub-arm 2111 of an adjacent low-frequency radiating arm 211. The other of the sub-arms 2111 of the low-frequency radiating arm 211 is parallel to and spaced apart from the sub-arm 2111 of another adjacent low-frequency radiating arm 211. Thus, the four low-frequency radiating arms 211 collectively form a cross shape. The side of each low-frequency radiating arm 211 away from the symmetric center of the low-frequency radiator 21 forms a corner region 212. It can be understood that the corner region 212 has an open shape.

[0050] The low-frequency radiator 21 is supported on the reflecting plate 1 by the low-frequency feed 22. The four low-frequency radiating arms 211 are parallel to the surface of the first side 11 of the reflecting plate 1. Electromagnetic radiation generated by the low-frequency radiator 21 is reflected by the reflecting plate 1 to form unidirectional radiation.

[0051] In some embodiments, the length of a horizontal or vertical arm of the cross-shaped low-frequency vibrator 21 is 0.35λ1-0.65λ1, i.e., the sum of the lengths of the two sub-arms 2111 of the low-frequency radiation arm 211 is greater than 0.35λ1 and less than 0.65λ1; the height of the low-frequency feed 22 in the direction Z perpendicular to the surface of the first side 11 of the reflector plate 1 is 0.2λ1-0.3λ1, so that the vertical distance between the low-frequency radiation arm 211 and the surface of the first side 11 of the reflector plate 1 is greater than 0.2λ1 and less than 0.3λ1; wherein λ1 is the wavelength corresponding to the center frequency of the operating frequency band of the low-frequency vibrator 21. Preferably, the vertical distance between the low-frequency radiation arm 211 and the surface of the first side 11 of the reflector plate 1 can be 0.25λ1; the length of a horizontal or vertical arm of the cross-shaped low-frequency vibrator 21 is 0.5λ1. In this way, the vertical distance between the low-frequency radiation arm 211 and the surface of the first side 11 of the reflector plate 1 is approximately one quarter of the wavelength corresponding to the center frequency of the operating frequency band of the low-frequency vibrator 21, and the sum of the lengths of the two sub-arms 2111 of the low-frequency radiation arm 211 is approximately half of the wavelength corresponding to the center frequency of the operating frequency band of the low-frequency vibrator 21.

[0052] The four high-frequency radiation units 3 are distributed in the four corner regions 212 one by one, which means that the orthographic projection of each high-frequency radiation unit 3 on the first side 11 of the reflector plate 1 corresponds to the orthographic projection range of one corner region 212 of the low-frequency vibrator 21 on the first side 11 of the reflector plate 1. Thus, each high-frequency radiation surface 311 is located between the two sub-arms 2111 of one low-frequency radiation arm 211, which is more compact and conducive to the miniaturization of the antenna; the high-frequency radiation surface 311 is spaced apart from the low-frequency radiation arm 211, so that the high-frequency radiation surface 311 and the low-frequency radiation arm 211 maintain a certain distance, which can reduce the electromagnetic coupling interference between the high-frequency vibrator 31 and the low-frequency vibrator 21, thereby reducing the cross-frequency mutual coupling effect; wherein the higher the frequency band of the high-frequency vibrator 31, the greater the required spacing distance. Since the corner region 212 is in an open shape, the side of the high-frequency radiation surface 311 away from the low-frequency radiation arm 211 is not blocked, and the spacing between the high-frequency radiation surface 311 and the low-frequency radiation arm 211 is not limited. The relative position of the high-frequency radiation surface 311 and the low-frequency radiation arm 211 and the spacing therebetween can be flexibly adjusted according to the high-frequency bandwidth requirement, thereby effectively reducing the mutual coupling effect, while the high-frequency bandwidth is not limited and the frequency band of the high-frequency vibrator 31 is not limited.

[0053] The high-frequency vibrator 31 is supported on the reflector plate 1 by the high-frequency feed 32, and the high-frequency radiation surface 311 is parallel to the surface of the first side 11 of the reflector plate 1. At the same time, a grounding substrate 33 is arranged between the high-frequency vibrator 31 and the reflector plate 1, which is used to reflect the electromagnetic radiation generated by the high-frequency vibrator 31 to form unidirectional radiation.

[0054] In some embodiments, the high-frequency radiating surface 311 of the high-frequency vibrator 31 has a side length of 0.35λ 2 -0.65λ 2, and the vertical distance between the high-frequency radiating surface 311 and the grounding substrate 33 is 0.2λ 2 -0.3λ 2, where λ 2 is the wavelength corresponding to the center frequency of the working frequency band of the high-frequency vibrator 31. Preferably, the vertical distance between the high-frequency radiating surface 311 and the grounding substrate 33 can be 0.25λ 2, and the side length of the high-frequency radiating surface 311 can be 0.5λ 2. In this way, the vertical distance between the high-frequency radiating surface 311 and the grounding substrate 33 is approximately one fourth of the wavelength corresponding to the center frequency of the working frequency band of the high-frequency vibrator 31, and the side length of the high-frequency radiating surface 311 is approximately one half of the wavelength corresponding to the center frequency of the working frequency band of the high-frequency vibrator 31. The working frequency band of the low-frequency vibrator 21 is less than the working frequency band of the high-frequency vibrator 31.

[0055] Since the high-frequency radiating unit 3 is provided with the grounding substrate 33, an independent radiation environment can be created for the high-frequency vibrator 31 to realize the pattern preserving of the high-frequency vibrator 31. The electromagnetic radiation generated by the high-frequency radiating surface 311 forms unidirectional radiation after being reflected by the grounding substrate 33, and the electromagnetic radiation generated by the low-frequency vibrator 21 forms unidirectional radiation after being reflected by the reflecting plate 1, which can meet the requirement that the vertical heights of the high-frequency radiating surface 311 and the low-frequency radiating arm 211 relative to the reflecting surface are inconsistent, and can form independent radiation environments for the high-frequency vibrator 31 and the low-frequency vibrator 21, which is conducive to realizing more flexible layout and pattern preserving of the high-frequency vibrator 31 and the low-frequency vibrator 21. Moreover, the grounding substrate 33 is electrically small relative to the low-frequency vibrator 21, and will not have negative impact on the radiation performance of the low-frequency vibrator 21.

[0056] The quarter wavelength of the high-frequency vibrator 31 refers to one fourth of the wavelength corresponding to the center frequency of the working frequency band of the high-frequency vibrator 31. Since the distance between the high-frequency radiating surface 311 and the low-frequency radiating arm 211 in the direction Z perpendicular to the surface of the first side 11 of the reflecting plate 1 is less than the quarter wavelength of the high-frequency vibrator 31, that is, the height difference between the high-frequency radiating surface 311 and the low-frequency radiating arm 211 relative to the first side 11 of the reflecting plate 1 is within the quarter wavelength of the high-frequency vibrator 31. In this way, the height difference between the high-frequency radiating surface 311 and the low-frequency radiating arm 211 is small, which can reduce the electromagnetic coupling interference between the high-frequency vibrator 31 and the low-frequency vibrator 21, and is conducive to reducing the alien frequency mutual coupling effect, so that external circuits do not need to be added, the design is simple, the loss is small and the efficiency is high, which is conducive to realizing the multi-frequency fusion of the antenna and improving the performance of the multi-band antenna.

[0057] In some embodiments, as shown in FIG. 2, the high-frequency radiating unit 3 is arranged on the reflecting plate 1, and the high-frequency vibrator 31 is arranged on the high-frequency radiating surface 311 of the high-frequency radiating unit 3. Figure 1 and Figure 2As shown, preferably, the vertical distance between the high-frequency radiation surface 311 and the first side 11 surface of the reflecting plate 1 and the vertical distance between the low-frequency radiation arm 211 and the first side 11 surface of the reflecting plate 1 are substantially equal, so that the high-frequency radiation surface 311 and the low-frequency radiation arm 211 form a substantially coplanar radiation structure. In this way, it is beneficial to further reduce the electromagnetic coupling interference between the high-frequency vibrator 31 and the low-frequency vibrator 21, reduce the loss, and improve the antenna performance.

[0058] As shown in some embodiments, as shown in Figure 4 and Figure 5 As shown, the vertical distance between the high-frequency radiation surface 311 and the first side 11 surface of the reflecting plate 1 and the vertical height between the low-frequency radiation arm 211 and the first side 11 surface of the reflecting plate 1 can also be inconsistent, so that the high-frequency radiation surface 311 and the low-frequency radiation arm 211 are not in the same plane. For example, in the direction Z perpendicular to the first side 11 surface of the reflecting plate 1, the high-frequency radiation surface 311 can be located on the side of the low-frequency radiation arm 211 away from the reflecting plate 1, and the high-frequency radiation surface 311 can also be located on the side of the low-frequency radiation arm 211 close to the reflecting plate 1. In this way, it is beneficial to realize more flexible layout of the multi-frequency radiation unit 100.

[0059] The multi-frequency radiation unit 100 of the embodiments of the present application, by adopting the cross-shaped low-frequency vibrator 21, makes the spacing between the high-frequency radiation surface 311 and the low-frequency radiation arm 211 unrestricted, can flexibly adjust the relative position of the high-frequency radiation surface 311 and the low-frequency radiation arm 211 and the spacing between the high-frequency radiation surface 311 and the low-frequency radiation arm 211 according to the high-frequency bandwidth demand, thereby effectively reducing the effect of inter-frequency mutual coupling while making the high-frequency bandwidth unrestricted, solving the problem of limited high-frequency bandwidth; by setting the grounding substrate 33, an independent radiation environment for the high-frequency vibrator 31 and the low-frequency vibrator 21 can be formed, and by setting the height difference between the high-frequency radiation surface 311 and the low-frequency radiation arm 211 within the range of one-quarter wavelength of the high-frequency vibrator 31, the interference between vibrators of different frequency bands can be greatly reduced, effectively realizing decoupling between the high-frequency vibrator 31 and the low-frequency vibrator 21, and realizing stable patterns of the high-frequency vibrator 31 and the low-frequency vibrator 21 in their respective working frequency bands, without the need to increase external circuits, with simple design, small loss and high efficiency, which is beneficial to realize multi-frequency fusion, antenna miniaturization and light weight, and is beneficial to improve the performance of the multi-frequency band antenna.

[0060] In some embodiments, referring to Figures 1 to 5The low-frequency radiating unit 2 further comprises a low-frequency dielectric substrate 23 and a low-frequency base 24 fixedly arranged on the reflecting plate 1, one end of the low-frequency feeding element 22 is fixedly connected to the low-frequency base 24, the low-frequency dielectric substrate 23 is fixedly connected to the other end of the low-frequency feeding element 22 away from the reflecting plate 1, and the surface of the low-frequency dielectric substrate 23 is parallel to the first side 11 of the reflecting plate 1; four low-frequency radiating arms 211 are arranged on the surface of the low-frequency dielectric substrate 23 away from the reflecting plate 1, and a grounding layer (not shown in the figure) is arranged on the surface of the low-frequency dielectric substrate 23 facing the reflecting plate 1.

[0061] The four low-frequency radiating arms 211 can be four groups of microstrip lines printed on one surface of the low-frequency dielectric substrate 23, and a grounding layer is arranged on the other surface of the low-frequency dielectric substrate 23, so as to form a low-frequency PCB (Printed Circuit Board) board based on the principle of microstrip line transmission line. The low-frequency PCB board is fixedly connected to the low-frequency feeding element 22, the low-frequency feeding element 22 is fixedly connected to the low-frequency base 24, and the low-frequency base 24 is fixed on the reflecting plate 1, so as to realize that the low-frequency vibrator 21 is supported and arranged on the reflecting plate 1 through the low-frequency feeding element 22. The low-frequency base 24 can also be a microstrip line PCB board, and the low-frequency base 24 is provided with a low-frequency feeding circuit for low-frequency feeding.

[0062] By arranging the low-frequency dielectric substrate 23, the low-frequency vibrator 21 is conveniently supported and fixed, and the manufacturability of the low-frequency vibrator 21 is improved; by arranging the low-frequency base 24, the low-frequency feeding element 22 is conveniently fixed on the reflecting plate 1 through the low-frequency base 24, the installation is convenient, the manufacturability of the multi-frequency radiating unit 100 is improved, and the cost is reduced.

[0063] In some embodiments, referring to Figures 1 to 5 The high-frequency radiating unit 3 further comprises a high-frequency dielectric substrate 34 and a high-frequency base 35 fixedly arranged on the reflecting plate 1, one end of the high-frequency feeding element 32 is fixedly connected to the high-frequency base 35, the high-frequency dielectric substrate 34 is fixedly connected to the other end of the high-frequency feeding element 32 away from the reflecting plate 1, and the surface of the high-frequency dielectric substrate 34 is parallel to the first side 11 of the reflecting plate 1; the high-frequency radiating surface 311 is arranged on the surface of the high-frequency dielectric substrate 34 away from the reflecting plate 1, and a grounding layer (not shown in the figure) is arranged on the surface of the high-frequency dielectric substrate 34 facing the reflecting plate 1.

[0064] The high-frequency radiation surface 311 can also be a microstrip line printed on one side surface of the high-frequency dielectric substrate 34, and a ground layer is arranged on the opposite side surface of the high-frequency dielectric substrate 34, thereby forming a high-frequency PCB board in the principle of microstrip line transmission line. Therefore, the four high-frequency radiation units 3 can include four high-frequency PCB boards. The high-frequency PCB board is fixedly connected to the high-frequency feed 32, the high-frequency feed 32 is fixedly connected to the high-frequency base 35, and the high-frequency base 35 is fixed to the reflecting plate 1, thereby achieving that the high-frequency radiator 31 is supported and arranged on the reflecting plate 1 through the high-frequency feed 32. In some embodiments, the ground substrate 33 can be fixedly connected to the high-frequency feed 32, thereby not needing an additional design structure support to fix the ground substrate 33.

[0065] By arranging the high-frequency dielectric substrate 34, the high-frequency radiator 31 is conveniently supported and fixed, and the manufacturability of the high-frequency radiator 31 is improved. By arranging the high-frequency base 35, the high-frequency feed 32 is conveniently fixed to the reflecting plate 1 through the high-frequency base 35, the installation is convenient, and the high-frequency feed 32 can independently support the ground substrate 33 and the high-frequency radiation surface 311, thereby improving the manufacturability of the multi-frequency radiation unit 100 and reducing the cost.

[0066] In some embodiments, referring to Figures 1 to 5 , the low-frequency dielectric substrate 23 and the high-frequency dielectric substrate 34 are independently arranged.

[0067] The low-frequency dielectric substrate 23 and the high-frequency dielectric substrate 34 are independently arranged, and the low-frequency dielectric substrate 23 and the high-frequency dielectric substrate 34 are designed in a split type, thereby forming a split structure, and the high-frequency radiation surface 311 and the low-frequency radiation arm 211 do not share a dielectric substrate. In some embodiments, the low-frequency dielectric substrate 23 is arranged in a cross shape matched with the shape of the low-frequency radiator 21.

[0068] By adopting the split structure, the high-frequency radiator 31 and the low-frequency radiator 21 can be independently disassembled and repaired, the high-frequency radiator 31 and the low-frequency radiator 21 can be respectively assembled, welded, and repaired, thereby improving the maintainability of the multi-frequency radiation unit 100 and prolonging the service life. The high-frequency radiation surface 311 and the low-frequency radiation arm 211 can be arranged on different planes, thereby facilitating the flexible layout of the multi-frequency radiation unit 100. In addition, the four high-frequency radiators 31 are designed in a split type, each high-frequency radiator 31 can work in a different frequency band, the flexible combination of one low frequency and multiple high frequencies can be achieved, the layout is more flexible, multiple modes and multiple functions can be provided, and the performance of the multi-band antenna is improved.

[0069] In some embodiments, referring to Figures 6 to 12 , Figure 6Fig. 6 shows a perspective view of the multi-frequency radiating unit 100 according to some embodiments of the present application, Figure 7 Fig. 7 shows another perspective view of the multi-frequency radiating unit 100 according to some embodiments of the present application, Figure 8 Fig. 8 shows yet another perspective view of the multi-frequency radiating unit 100 according to some embodiments of the present application, Figure 9 Fig. 9 shows still another perspective view of the multi-frequency radiating unit 100 according to some embodiments of the present application, Figure 10 Fig. 10 shows a front view of the multi-frequency radiating unit 100 according to some embodiments of the present application, Figure 11 Fig. 11 shows a left view of the multi-frequency radiating unit 100 according to some embodiments of the present application, Figure 12 Fig. 12 shows a top view of the multi-frequency radiating unit 100 according to some embodiments of the present application, in which the low-frequency dielectric substrate 23 and the at least one high-frequency dielectric substrate 34 are fixedly connected as a whole.

[0070] The low-frequency dielectric substrate 23 and the high-frequency dielectric substrate 34 can be integrally formed. For example, the low-frequency dielectric substrate 23 and one, two or three high-frequency dielectric substrates 34 can be integrally formed, or the low-frequency dielectric substrate 23 and all four high-frequency dielectric substrates 34 can be integrally formed, thereby forming a whole dielectric substrate.

[0071] In this way, the low-frequency radiating arm 211 can share a dielectric substrate with the at least one high-frequency radiating surface 311, thereby realizing a radiating structure in which the high-frequency radiating surface 311 and the low-frequency radiating arm 211 are coplanar, which is conducive to reducing electromagnetic coupling interference between the high-frequency vibrator 31 and the low-frequency vibrator 21, reducing loss, improving antenna performance, and can save the assembly process of the high-frequency vibrator 31 and the low-frequency vibrator 21, improve assembly efficiency, and is conducive to improving the manufacturability of the multi-frequency radiating unit 100 and reducing costs.

[0072] In some embodiments, the high-frequency base 35 and the low-frequency base 24 can be independently arranged; in this way, it is convenient to disassemble and maintain separately, and improve maintainability and layout flexibility. In other embodiments, the low-frequency base 24 can also be fixedly connected as a whole with the at least one high-frequency base 35, for example, the high-frequency base 35 and the low-frequency base 24 can be integrally formed; in this way, it is convenient to install the high-frequency base 35 and the low-frequency base 24 to the reflector plate 1, and improve assembly efficiency.

[0073] In some embodiments, referring to Figure 1 , Figure 2 , Figures 4 to 11The low-frequency feeding member 22 includes a low-frequency balun substrate 221, a low-frequency feeding balun 222 arranged on one side surface of the low-frequency balun substrate 221, and a low-frequency balun ground (not shown in the figure) arranged on the opposite side surface of the low-frequency balun substrate 221. The low-frequency feeding member 22 includes two low-frequency feeding members 22, one low-frequency feeding balun 222 of one low-frequency feeding member 22 is electrically connected to two oppositely arranged low-frequency radiating arms 211, one low-frequency feeding balun 222 of the other low-frequency feeding member 22 is electrically connected to the other two oppositely arranged low-frequency radiating arms 211, and the low-frequency balun grounds of the two low-frequency feeding members 22 are electrically connected to the ground layer of the low-frequency dielectric substrate 23. The two low-frequency feeding members 22 are vertically connected between the low-frequency dielectric substrate 23 and the low-frequency base 24, and the two low-frequency feeding members 22 are vertically and crossly arranged.

[0074] The low-frequency feeding balun 222 can be a microstrip line printed on one side surface of the low-frequency balun substrate 221, so that the low-frequency feeding member 22 forms a low-frequency feeding PCB board based on the principle of microstrip line transmission line. In some embodiments, the low-frequency base 24 can include a dielectric layer and a feeding circuit and a ground layer arranged on the opposite two side surfaces of the dielectric layer. One end of the low-frequency balun substrate 221 of the low-frequency feeding member 22 is fixedly connected to the low-frequency dielectric substrate 23, and the other end of the low-frequency balun substrate 221 is fixedly connected to the dielectric layer of the low-frequency base 24, so that the low-frequency vibrator 21 is supported on the low-frequency base 24 by the low-frequency feeding member 22, without the need for additional design of a support structure member. At the same time, the four low-frequency radiating arms 211 of the low-frequency vibrator 21 are divided into two polarizations, each polarization including two oppositely arranged low-frequency radiating arms 211. One end of one low-frequency feeding balun 222 is electrically connected to the two low-frequency radiating arms 211 of one polarization of the low-frequency vibrator 21, and the other end of the low-frequency feeding balun 222 is electrically connected to the feeding circuit of the low-frequency base 24, so as to realize feeding to one polarization of the low-frequency vibrator 21. Two low-frequency feeding baluns 222 feed two polarizations of the low-frequency vibrator 21. One end of the two low-frequency balun grounds is electrically connected to the ground layer of the low-frequency dielectric substrate 23, and the other end is electrically connected to the ground layer of the low-frequency base 24.

[0075] Further, the two low-frequency feeding members 22 are vertically and crossly arranged, so that the two low-frequency feeding baluns 222 are also vertically arranged with respect to each other, corresponding to the two polarizations of the low-frequency vibrator 21, forming a vertically and crossly arranged balun structure, and the feeding effect is better. Moreover, the two low-frequency feeding members 22 arranged vertically and crossly can support each other, and have strong support performance.

[0076] In this way, by arranging the low-frequency feed 22 in a vertical cross structure, the low-frequency vibrator 21 of the multi-frequency radiating unit 100 can be reliably supported by itself, has good structural stability, and does not need to be supported and fixed by an additional support structure, is compact in structure, is conducive to miniaturization and light weight of the multi-frequency radiating unit 100, is simple to install, and has a simple and reliable structure and stable performance, thereby effectively improving the structural reliability of the multi-frequency radiating unit 100.

[0077] In some embodiments, referring to Figure 1 、 Figure 2 、 Figures 4 to 11 , the high-frequency feed 32 includes a high-frequency balun substrate 321, a high-frequency feed balun 322 arranged on one side surface of the high-frequency balun substrate 321, and a high-frequency balun ground (not shown in the figure) arranged on the opposite side surface of the high-frequency balun substrate 321; the high-frequency feed 32 includes two, one high-frequency feed balun 322 of one of the high-frequency feeds 32 is electrically connected to one polarization of the high-frequency radiating surface 311, and one high-frequency feed balun 322 of the other high-frequency feed 32 is electrically connected to the other polarization of the high-frequency radiating surface 311, and the high-frequency balun grounds of the two high-frequency feeds 32 are electrically connected to the ground layer of the high-frequency dielectric substrate 34. The two high-frequency feeds 32 are vertically connected between the high-frequency dielectric substrate 34 and the high-frequency base 35, and the two high-frequency feeds 32 are arranged vertically and cross each other.

[0078] The high-frequency feed balun 322 can be a microstrip line printed on one side surface of the high-frequency balun substrate 321, so that the high-frequency feed 32 is a high-frequency feed PCB board formed by microstrip line transmission line principle. In some embodiments, the high-frequency base 35 can include a dielectric layer and a feed circuit and a ground layer arranged on the opposite two side surfaces of the dielectric layer. One end of the high-frequency balun substrate 321 of the high-frequency feed 32 is fixedly connected to the high-frequency dielectric substrate 34, and the other end of the high-frequency balun substrate 321 is fixedly connected to the dielectric layer of the high-frequency base 35, so that the high-frequency vibrator 31 is supported on the high-frequency base 35 by the high-frequency feed 32, without the need for additional design of a support structure. At the same time, the high-frequency radiating surface 311 can include two polarizations arranged orthogonally. One end of one high-frequency feed balun 322 is electrically connected to one polarization of the high-frequency radiating surface 311, and the other end is electrically connected to the feed circuit of the high-frequency base 35, so as to realize feeding of one polarization of the high-frequency vibrator 31; two high-frequency feed baluns 322 feed two polarizations of the high-frequency vibrator 31. One end of the two high-frequency balun grounds is electrically connected to the ground layer of the high-frequency dielectric substrate 34, and the other end is electrically connected to the ground layer of the high-frequency base 35. In some embodiments, the ground substrate 33 can include a dielectric layer and a ground layer, the dielectric layer of the ground substrate 33 is fixedly connected to the high-frequency balun substrate 321 of the high-frequency feed 32, and the ground layer of the ground substrate 33 is electrically connected to the high-frequency balun ground of the high-frequency feed 32.

[0079] Further, the two high-frequency feeding members 32 are arranged vertically and cross each other, so that the two high-frequency feeding baluns 322 are also arranged vertically to each other, corresponding to the two polarizations of the high-frequency vibrator 31, forming a vertically cross balun structure, and the feeding effect is better. Moreover, the two high-frequency feeding members 32 arranged vertically and cross each other can support each other, and have strong support performance.

[0080] In this way, by arranging the high-frequency feeding member 32 in a vertically cross structure, the high-frequency vibrator 31 of the multi-frequency radiating unit 100 can realize reliable support by itself, has good structural stability, and does not need to be supported and fixed by an additional support structure, so that the structure is compact, which is beneficial to the miniaturization and light weight of the multi-frequency radiating unit 100, and the installation is simple, the structure is simple and reliable, and the performance is stable, and the structural reliability of the multi-frequency radiating unit 100 is effectively improved.

[0081] Further, the low-frequency feeding member 22 and the high-frequency feeding member 32 can be designed in a vertically cross structure, so that the entire multi-frequency radiating unit 100 can realize reliable support by itself, and does not need to be designed with an additional structural support member, so that the structure is compact, which is beneficial to the miniaturization and light weight of the multi-frequency radiating unit 100, is beneficial to improve the manufacturability of the multi-frequency radiating unit 100, and reduces the cost.

[0082] In some embodiments, referring to Figures 1 to 12 , the four high-frequency radiating units 3 have the same working frequency band.

[0083] Since the edge length dimension of the high-frequency radiation surface 311 of the high-frequency vibrator 31 is about half of the wavelength corresponding to the center frequency point of the working frequency band of the high-frequency radiating unit 3, by arranging the four high-frequency radiating units 3 to have the same working frequency band, the dimensions of the four high-frequency radiation surfaces 311 of the four high-frequency vibrators 31 are the same, and the vertical distances between the four high-frequency radiation surfaces 311 and the corresponding ground substrates 33 are also the same.

[0084] In this way, the multi-frequency radiating unit 100 can provide a dual-frequency radiating unit. Moreover, the four high-frequency radiating units 3 have the same structure, which is beneficial to improve the manufacturability of the multi-frequency radiating unit 100 and reduce the cost.

[0085] In some embodiments, referring to Figures 13 to 15 , Figure 13 Fig. 1 shows a perspective structural schematic view of a multi-frequency radiating unit 100 in some embodiments of the present application, Figure 14 Fig. 2 shows a front view of the multi-frequency radiating unit 100 in some embodiments of the present application, Figure 15 Fig. 3 shows a top view of the multi-frequency radiating unit 100 in some embodiments of the present application, and the working frequency bands of the at least one high-frequency radiating unit 3 are different.

[0086] For example, it can be that the operating frequency bands of three high-frequency radiation units 3 are the same, the operating frequency band of another high-frequency radiation unit 3 is different; or as shown in Figures 13 to 15 it can be that the operating frequency bands of two high-frequency radiation units 3 are the same, the operating frequency bands of another two high-frequency radiation units 3 are the same; thus the multi-frequency radiation unit 100 can provide a three-frequency radiation unit. It can also be that the operating frequency bands of two high-frequency radiation units 3 are the same, the operating frequency bands of another two high-frequency radiation units 3 are different; thus the multi-frequency radiation unit 100 can provide a four-frequency radiation unit. It can also be that the operating frequency bands of four high-frequency radiation units 3 are all different; thus the multi-frequency radiation unit 100 can provide a five-frequency radiation unit.

[0087] Due to the operating frequency bands of at least one high-frequency radiation unit 3 being different, the size of the high-frequency radiation surface 311 of at least one high-frequency vibrator 31 is different from the size of the high-frequency radiation surface 311 of other high-frequency vibrators 31, and the vertical distance between the high-frequency radiation surface 311 and its corresponding ground substrate 33 is also different.

[0088] In this way, the four high-frequency radiation units 3 can work in different frequency bands, can be flexibly configured as needed, realize a flexible combination effect of low frequency and multiple high frequencies, are conducive to realizing a multi-frequency and multi-port high-gain effect in a smaller size, can provide multi-standard and multi-functional services, and are conducive to improving the multi-band antenna performance.

[0089] Referring to Figure 16 and Figure 17 , Figure 16 a structural schematic diagram of an array antenna 1000 in some embodiments of the present application is shown, Figure 17 a structural schematic diagram of an array antenna 1000 in some embodiments of the present application is shown, and the present application further provides an array antenna 1000. The array antenna 1000 comprises the multi-frequency radiation unit 100 provided by any of the above embodiments.

[0090] The array antenna 1000 has the same beneficial effects as the multi-frequency radiation unit 100, which will not be repeated here.

[0091] In some embodiments, referring to Figure 16 and Figure 17The array antenna 1000 comprises a plurality of multi-frequency radiation units 100 arranged in an array along a first direction X, and the plurality of multi-frequency radiation units 100 share a reflecting plate 1; wherein four high-frequency radiation units 3 of each multi-frequency radiation unit 100 are distributed in two columns along a second direction Y, and the two columns of high-frequency radiation units 3 are located on opposite sides of the low-frequency radiation unit 2 along the second direction Y, and two high-frequency radiation units 3 in each column are arranged in alignment along the first direction X and have the same working frequency band; the first direction X and the second direction Y are both parallel to the surface of the first side 11 of the reflecting plate 1, and the first direction X is perpendicular to the second direction Y. The array antenna 1000 further comprises a plurality of single-frequency radiation units 200, and at least two single-frequency radiation units 200 are arranged between two adjacent multi-frequency radiation units 100 along the first direction X, and the at least two single-frequency radiation units 200 are arranged in alignment along the first direction X with the two columns of high-frequency radiation units 3, and the working frequency band of each single-frequency radiation unit 200 is the same as that of the high-frequency radiation unit 3 arranged in alignment along the first direction X.

[0092] The single-frequency radiation unit 200 refers to a radiation unit having a single working frequency band, and the working frequency band of the single-frequency radiation unit 200 is greater than that of the low-frequency radiation unit 2 in the multi-frequency radiation unit 100. Since the single-frequency radiation unit 200 is arranged on the reflecting plate 1 between the adjacent two multi-frequency radiation units 100, the electromagnetic radiation of the single-frequency radiation unit 200 can be directly reflected by the reflecting plate 1, that is, the single-frequency radiation unit 200 does not need to be additionally provided with a reflecting substrate, and the installation structure can be simplified. The vertical distance between the radiation surface of the single-frequency radiation unit 200 and the reflecting plate 1 is about one fourth of the wavelength corresponding to the center frequency point of the working frequency band of the single-frequency radiation unit 200. Since the working frequency band of each single-frequency radiation unit 200 is the same as that of the high-frequency radiation unit 3 arranged in alignment along the first direction X, the size of the radiation surface of the single-frequency radiation unit 200 is the same as that of the high-frequency radiation surface 311 of the high-frequency vibrator 31 of the high-frequency radiation unit 3 arranged in alignment along the first direction X.

[0093] By increasing the single-frequency radiation unit 200 between the adjacent multi-frequency radiation units 100 and sharing the reflecting plate 1, the high-gain effect of multi-frequency and multi-port can be achieved in a smaller size, which is beneficial to improve the performance of the array antenna 1000, improve the manufacturability, and reduce the cost.

[0094] In some embodiments, referring to Figure 16 The working frequency bands of the four high-frequency radiation units 3 of the plurality of multi-frequency radiation units 100 are the same.

[0095] Since the operating frequency band of the single-frequency radiating element 200 is the same as that of the high-frequency radiating element 3 aligned along the first direction X, and the operating frequency bands of all the high-frequency radiating elements 3 are the same, all the high-frequency radiating elements 3 and the single-frequency radiating element 200 have the same operating frequency band. All the low-frequency radiating elements 2 have another operating frequency band. That is, the array antenna 1000 has two operating frequency bands. In this way, the embodiment of the present application can provide a dual-frequency array antenna 1000.

[0096] In some embodiments, referring to Figure 17 , the operating frequency bands of the two columns of high-frequency radiating elements 3 of the multi-frequency radiating element 100 are different.

[0097] The four high-frequency radiating elements 3 of each multi-frequency radiating element 100 include two first high-frequency radiating elements 36 and two second high-frequency radiating elements 37, the operating frequency band of the first high-frequency radiating element 36 is different from that of the second high-frequency radiating element 37, for example, the two first high-frequency radiating elements 36 can have a first operating frequency band, and the two second high-frequency radiating elements 37 can have a second operating frequency band. The low-frequency radiating element 2 can have a third operating frequency band. The two first high-frequency radiating elements 36 are arranged on one side of the low-frequency radiating element 2 along the second direction Y, and the two second high-frequency radiating elements 37 are arranged on the opposite side of the low-frequency radiating element 2 along the second direction Y. Correspondingly, the single-frequency radiating element 200 includes a first single-frequency radiating element 201 aligned with the first high-frequency radiating element 36 along the first direction X and a second single-frequency radiating element 202 aligned with the second high-frequency radiating element 37 along the first direction X, the operating frequency band of the first single-frequency radiating element 201 is the same as that of the first high-frequency radiating element 36, and the operating frequency band of the second single-frequency radiating element 202 is the same as that of the second high-frequency radiating element 37. Thus, the array antenna 1000 has three operating frequency bands. In this way, the embodiment of the present application can provide a tri-band array antenna 1000.

[0098] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but it should be considered that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in contradictions.

[0099] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A multi-frequency radiation unit, characterized in that: include: reflective panels; A low-frequency radiating unit, comprising a low-frequency oscillator and a low-frequency feeding member, wherein the low-frequency oscillator is supported and arranged on the first side of the reflector by the low-frequency feeding member, and the low-frequency feeding member is used to feed the low-frequency oscillator, and the low-frequency oscillator comprises four low-frequency radiating arms, wherein the low-frequency radiating arms are parallel to the surface of the first side of the reflector, and the four low-frequency radiating arms are centrally symmetrically distributed and form a cross shape, and the cross-shaped low-frequency oscillator forms four angled areas; Four high-frequency radiation units are distributed in the four angle areas in a one-to-one correspondence; the high-frequency radiation unit includes a high-frequency vibrator, a high-frequency feeding element and a grounding substrate, the high-frequency vibrator is supported by the high-frequency feeding element and is arranged on the first side of the reflecting plate, the high-frequency feeding element is used to feed the high-frequency vibrator, the high-frequency vibrator includes a high-frequency radiation surface, the high-frequency radiation surface is parallel to the surface of the first side of the reflecting plate, and the distance between the high-frequency radiation surface and the low-frequency radiation arm in the direction perpendicular to the first side surface is less than one-quarter wavelength of the high-frequency vibrator, the grounding substrate is arranged on the high-frequency feeding element and is located between the high-frequency vibrator and the reflecting plate, and the grounding substrate is parallel to the high-frequency radiation surface.

2. The multi-frequency radiation unit according to claim 1, characterized in that: The low-frequency radiation unit further includes a low-frequency dielectric substrate and a low-frequency base, wherein the low-frequency base is fixedly disposed on the reflector, one end of the low-frequency feeder is fixedly connected to the low-frequency base, and the low-frequency dielectric substrate is fixedly connected to the other end of the low-frequency feeder away from the reflector, and the low-frequency dielectric substrate is parallel to the surface of the first side of the reflector; The four low-frequency radiation arms are arranged on a surface of the low-frequency dielectric substrate facing away from the reflector, and a ground layer is provided on a surface of the low-frequency dielectric substrate facing the reflector.

3. The multi-frequency radiation unit according to claim 2, characterized in that: The high-frequency radiation unit further includes a high-frequency dielectric substrate and a high-frequency base, wherein the high-frequency base is fixedly disposed on the reflector, one end of the high-frequency feeder is fixedly connected to the high-frequency base, and the high-frequency dielectric substrate is fixedly connected to the other end of the high-frequency feeder away from the reflector, and the high-frequency dielectric substrate is parallel to the surface of the first side of the reflector; The high-frequency radiation surface is arranged on a surface of the high-frequency dielectric substrate facing away from the reflection plate, and a ground layer is arranged on a surface of the high-frequency dielectric substrate facing the reflection plate.

4. The multi-frequency radiation unit according to claim 3, characterized in that: The low-frequency dielectric substrate and the high-frequency dielectric substrate are independently arranged; Alternatively, the low-frequency dielectric substrate is fixedly connected to at least one high-frequency dielectric substrate as a whole.

5. The multi-frequency radiation unit according to any one of claims 2 to 4, characterized in that: The low-frequency feeding element includes a low-frequency balun substrate, a low-frequency feeding balun provided on one side surface of the low-frequency balun substrate, and a low-frequency balun ground provided on the other side surface of the low-frequency balun substrate; The low-frequency feeding elements include two, wherein the low-frequency feeding balun of one of the low-frequency feeding elements is electrically connected to the two oppositely disposed low-frequency radiating arms, wherein the low-frequency feeding balun of the other low-frequency feeding element is electrically connected to the other two oppositely disposed low-frequency radiating arms, and the low-frequency balun grounds of the two low-frequency feeding elements are electrically connected to the ground layer of the low-frequency dielectric substrate; Wherein, the two low-frequency feeding elements are both vertically connected between the low-frequency dielectric substrate and the low-frequency base, and the two low-frequency feeding elements are perpendicular to each other and cross-arranged.

6. The multi-frequency radiation unit according to claim 3 or 4, characterized in that: The high-frequency feeding element includes a high-frequency balun substrate, a high-frequency feeding balun provided on one side surface of the high-frequency balun substrate, and a high-frequency balun ground provided on the other side surface of the high-frequency balun substrate; The high-frequency feeding elements include two, wherein the high-frequency feeding balun of one of the high-frequency feeding elements is electrically connected to one polarization of the high-frequency radiating surface, wherein the high-frequency feeding balun of the other high-frequency feeding element is electrically connected to the other polarization of the high-frequency radiating surface, and the high-frequency baluns of the two high-frequency feeding elements are electrically connected to the ground layer of the high-frequency dielectric substrate; The two high-frequency feeding elements are both vertically connected between the high-frequency dielectric substrate and the high-frequency base, and the two high-frequency feeding elements are perpendicular to each other and cross-arranged.

7. The multi-frequency radiation unit according to any one of claims 1 to 4, characterized in that: The four high-frequency radiation units have the same operating frequency band; Alternatively, at least one of the high-frequency radiation units has a different operating frequency band.

8. An array antenna, characterized in that: The array antenna includes the multi-frequency radiation unit according to any one of claims 1 to 6.

9. The array antenna according to claim 8, characterized in that The array antenna includes a plurality of multi-frequency radiating units arranged in an array along a first direction, the plurality of multi-frequency radiating units sharing a reflector, wherein the four high-frequency radiating units of each multi-frequency radiating unit are distributed in two columns along a second direction, the two columns of high-frequency radiating units are located on opposite sides of a low-frequency radiating unit along the second direction, the two high-frequency radiating units in each column are aligned along the first direction and have the same operating frequency band, the first direction and the second direction are both parallel to the surface of the first side of the reflector, and the first direction and the second direction are perpendicular to each other; The array antenna also includes multiple single-frequency radiating units, at least two of the single-frequency radiating units are arranged between two adjacent multi-frequency radiating units along the first direction, at least two of the single-frequency radiating units are respectively aligned with the two columns of high-frequency radiating units along the first direction, and the operating frequency band of each of the single-frequency radiating units is the same as the operating frequency band of the high-frequency radiating units aligned along the first direction.

10. The array antenna according to claim 9, characterized in that: The operating frequency bands of the four high-frequency radiation units of the plurality of multi-frequency radiation units are all the same.

11. The array antenna according to claim 9, wherein: The high-frequency radiation units in two columns of the multi-frequency radiation unit have different operating frequency bands.

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