Unit antenna and antenna structure

Abstract

The invention discloses a unit antenna and an antenna structure. The unit antenna comprises a reflecting plate and a radiation assembly. The radiation assembly is arranged on the first side of the reflecting plate. The radiation assembly comprises an oscillator and a feed network. And at least one of the vibrator and the feed network adopts an air microstrip structure. Therefore, the loss of electromagnetic waves propagating in a medium can be reduced, so that the loss of the unit antennas is reduced, and the gain of the antenna array is improved.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a unit antenna and an antenna structure. Background Art

[0002] In the related art, the antenna's oscillator and feeding network usually use coaxial cables, which causes large losses in the antenna itself and results in low gain of the antenna array. Summary of the invention

[0003] The embodiments of the present application provide a unit antenna and an antenna structure to improve the technical problems of large antenna loss and low gain.

[0004] On the one hand, an embodiment of the present application provides a unit antenna, including:

[0005] Reflective panels;

[0006] The radiation component is arranged on the first side of the reflection plate, and the radiation component includes an oscillator and a feeding network, and at least one of the oscillator and the feeding network adopts an air microstrip structure.

[0007] In some embodiments, the radiation component includes a high-frequency radiation component and a low-frequency radiation component, the high-frequency radiation component includes a high-frequency oscillator and a high-frequency feeding network connected to each other, and at least one of the high-frequency oscillator and the high-frequency feeding network adopts an air microstrip structure; and / or, the low-frequency radiation component includes a low-frequency oscillator and a low-frequency feeding network connected to each other, and at least one of the low-frequency oscillator and the low-frequency feeding network adopts an air microstrip structure.

[0008] In some embodiments, the high-frequency oscillator includes a first metal sheet and a second metal sheet that are spaced apart, and the first metal sheet is electrically connected to the second metal sheet, wherein the second metal sheet is located on a side of the first metal sheet away from the reflective plate, and the distance between the reflective plate and the second metal sheet is L1, satisfying: 15 mm ≤ L1 ≤ 25 mm.

[0009] In some embodiments, the diameter of the first metal sheet is D1, and the diameter of the second metal sheet is D2, satisfying: 50 mm ≤ D1 ≤ 70 mm, 20 mm ≤ D2 ≤ 40 mm.

[0010] In some embodiments, a first protrusion is configured on the reflective plate, wherein the first metal sheet is electrically connected to the reflective plate via the first protrusion, and a height of the first protrusion is H1, satisfying: 2 mm ≤ H1 ≤ 8 mm.

[0011] In some embodiments, a first support member is arranged between the first metal sheet and the second metal sheet, a first mounting channel is formed in the first support member, the first protrusion is configured with a first connecting hole, the first metal sheet and the second metal sheet are electrically connected through a first conductive member, the first conductive member passes through the first mounting channel, and is connected to the first connecting hole.

[0012] In some embodiments, the high-frequency feeding network is integrally formed with the first metal sheet.

[0013] In some embodiments, the low-frequency vibrator includes a third metal sheet and a fourth metal sheet that are spaced apart, and the third metal sheet is electrically connected to the fourth metal sheet, wherein the fourth metal sheet is located on the side of the fourth metal sheet away from the reflective plate, and the distance between the reflective plate and the fourth metal sheet is L2, satisfying: 20 mm ≤ L2 ≤ 40 mm.

[0014] In some embodiments, the diameter of the third metal sheet is D3, and the diameter of the fourth metal sheet is D4, satisfying: 210 mm ≤ D3 ≤ 240 mm, 150 mm ≤ D4 ≤ 180 mm.

[0015] In some embodiments, a second protrusion is further constructed on the reflective plate, wherein the third metal sheet is electrically connected to the reflective plate via the second protrusion, and a height of the second protrusion is H2, satisfying: 2 mm ≤ H2 ≤ 8 mm.

[0016] In some embodiments, a second supporting member is arranged between the third metal sheet and the fourth metal sheet, a second mounting channel is formed in the second supporting member, the second protrusion is configured with a second connecting hole, the third metal sheet and the fourth metal sheet are electrically connected through a second conductive member, the second conductive member passes through the second mounting channel and is connected to the second connecting hole.

[0017] In some embodiments, the low-frequency feeding network is integrally formed with the third metal sheet.

[0018] In some embodiments, the high-frequency feeding network has two feeding ports, the phase difference between the two feeding ports of the high-frequency feeding network is Φ1, and the power ratio between the two feeding ports of the high-frequency feeding network is Y1, satisfying: -10°≤Φ1≤10°, Y1=1:(1~1.2).

[0019] In some embodiments, the low-frequency feeding network has two feeding ports, the phase difference between the two feeding ports of the low-frequency feeding network is Φ2, and the power ratio between the two feeding ports of the low-frequency feeding network is Y2, satisfying: -10°≤Φ2≤10°, Y2=1: (1~1.2).

[0020] In some embodiments, the unit antenna further comprises:

[0021] A combiner is arranged on the second side of the reflection plate, and the combiner is electrically connected to the high-frequency feeding network and the low-frequency feeding network.

[0022] In some embodiments, the combiner has a high-frequency feed port, a low-frequency feed port and a main feed port, the high-frequency feed port is electrically connected to the high-frequency feed network, the low-frequency feed port is electrically connected to the low-frequency feed network, and the main feed port is configured to be electrically connected to a radio frequency connector.

[0023] In some embodiments, both opposite ends of the reflective plate are provided with flanges bent toward the second side of the reflective plate, and a reinforcing member is connected between the flange and the reflective plate.

[0024] On the other hand, an embodiment of the present application also provides an antenna structure, comprising at least three unit antennas as described above, wherein at least three of the reflective plates are connected end to end in sequence, and the first side of the reflective plate is the side of the reflective plate away from the internal cavity.

[0025] The unit antenna and antenna structure of the embodiment of the present application, by making at least one of the oscillator and the feeding network adopt an air microstrip structure and using air as the propagation medium, can reduce the loss of electromagnetic waves propagating in the medium, thereby reducing the loss of the unit antenna itself and improving the gain of the antenna array. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 is a structural schematic diagram of an antenna structure provided in an embodiment of the present application;

[0028] Figure 2 is a top view of a unit antenna provided in an embodiment of the present application;

[0029] Figure 3 is a side view of a unit antenna provided in an embodiment of the present application;

[0030] Figure 4 is a bottom view of the unit antenna provided in an embodiment of the present application;

[0031] Figure 5 is a schematic diagram of the structure of a combiner provided in an embodiment of the present application;

[0032] Figure 6 is a frequency-efficiency curve diagram of the antenna structure of an embodiment of the present application;

[0033] Figure 7 4 is a frequency-peak gain curve diagram of the antenna structure of an embodiment of the present application.

[0034] Reference numerals:

[0035] 10-reflection plate, 110-first protrusion, 120-first support member, 130-first conductive member, 140-second protrusion, 150-second support member, 160-second conductive member, 170-flange, 180-reinforcement member, 190-grounding member, 20-high-frequency radiation component, 210-high-frequency oscillator, 220-high-frequency feeding network, 230-first metal sheet, 240-second metal sheet, 30-low-frequency radiation component, 310-low-frequency oscillator, 320-low-frequency feeding network, 330-third metal sheet, 340-fourth metal sheet, 40-combiner, 410-high-frequency feeding port, 420-low-frequency feeding port, 430-main feeding port, 50-RF connector. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0037] In the following description, specific embodiments of the present invention will be described with reference to steps and symbols performed by one or more computers, unless otherwise specified. Therefore, these steps and operations will be mentioned several times as being performed by a computer, and computer execution referred to herein includes operations by a computer processing unit of electronic signals representing data in a structured form. This operation converts the data or maintains it at a location in the memory system of the computer, which can be reconfigured or otherwise change the operation of the computer in a manner familiar to testers in the field. The data structure maintained by the data is a physical location in the memory, which has specific characteristics defined by the data format. However, the principles of the present invention are described in the above text, which does not represent a limitation, and testers in the field will understand that the various steps and operations described below can also be implemented in hardware.

[0038] The term "module" or "unit" used herein can be regarded as a software object executed on the computing system. The different components, modules, engines and services described herein can be regarded as implementation objects on the computing system. The apparatus and method described herein are preferably implemented in software, but can also be implemented in hardware, all within the scope of protection of the present invention.

[0039] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0040] See also Figures 1 to 7 The embodiment of the present application provides a unit antenna. The unit antenna includes a reflector 10 and a radiation component. The radiation component is arranged on a first side of the reflector 10. The radiation component includes a vibrator and a feeding network. At least one of the vibrator and the feeding network adopts an air microstrip structure.

[0041] In the embodiment of the present application, by making at least one of the oscillator and the feeding network adopt an air microstrip structure and using air as the propagation medium, the loss of electromagnetic waves propagating in the medium can be reduced, thereby reducing the loss of the unit antenna itself and improving the gain of the antenna array.

[0042] In some embodiments, only the oscillator may adopt the air microstrip structure, or only the feeding network may adopt the air microstrip structure, or both the oscillator and the feeding network may adopt the air microstrip structure.

[0043] In some embodiments, the radiation component includes a high-frequency radiation component 20 and a low-frequency radiation component 30. The high-frequency radiation component 20 includes a high-frequency oscillator 210 and a high-frequency feeding network 220 connected to each other. At least one of the high-frequency oscillator 210 and the high-frequency feeding network 220 adopts an air microstrip structure. And / or, the low-frequency radiation component 30 includes a low-frequency oscillator 310 and a low-frequency feeding network 320 connected to each other. At least one of the low-frequency oscillator 310 and the low-frequency feeding network 320 adopts an air microstrip structure.

[0044] It can be understood that the radiation component includes a high-frequency radiation component 20 and a low-frequency radiation component 30 to achieve full high-frequency and low-frequency coverage of the unit antenna. Among them, at least one of the high-frequency oscillator 210 and the high-frequency feeding network 220 in the high-frequency radiation component 20 adopts an air microstrip structure, so that the high-frequency oscillator 210 and / or the high-frequency feeding network 220 use air as the propagation medium, which can reduce the loss of electromagnetic waves propagating in the medium, thereby reducing the loss of the unit antenna itself, and improving the gain of the antenna array. Among them, at least one of the low-frequency oscillator 310 and the low-frequency feeding network 320 in the low-frequency radiation component 30 adopts an air microstrip structure, so that the low-frequency oscillator 310 and / or the low-frequency feeding network 320 use air as the propagation medium, which can reduce the loss of electromagnetic waves propagating in the medium, thereby reducing the loss of the unit antenna itself, and improving the gain of the antenna array.

[0045] In some embodiments, only the high frequency oscillator 210 may adopt the air microstrip structure. Alternatively, only the high frequency feeding network 220 may adopt the air microstrip structure. Alternatively, both the high frequency oscillator 210 and the high frequency feeding network 220 may adopt the air microstrip structure.

[0046] In some embodiments, only the low-frequency oscillator 310 may adopt the air microstrip structure. Alternatively, only the low-frequency feeding network 320 may adopt the air microstrip structure. Alternatively, both the low-frequency oscillator 310 and the low-frequency feeding network 320 may adopt the air microstrip structure.

[0047] like Figure 2 and Figure 3 As shown, in some embodiments, the high frequency oscillator 210 includes a first metal sheet 230 and a second metal sheet 240 arranged at intervals. The first metal sheet 230 is electrically connected to the second metal sheet 240. The second metal sheet 240 is located on a side of the first metal sheet 230 away from the reflector 10. The distance between the reflector 10 and the second metal sheet 240 is L1. Satisfies: 15 mm ≤ L1 ≤ 25 mm.

[0048] It is understandable that in the traditional antenna structure, the high-frequency vibrator 210 of the high-frequency radiation component 20 is usually electrically connected to the reflector 10 using a balun, and the impedance of the antenna is adjusted using the balun. Based on the design of the balun, the antenna impedance can be quickly adjusted. However, the height of the balun is relatively large, resulting in a large height of the high-frequency vibrator 210. This causes the overall size of the antenna to be larger and the weight to be heavier, which limits the use scenarios of the antenna. In the present application, the high-frequency vibrator 210 is formed by a first metal sheet 230 and a second metal sheet 240 to replace the traditional high-frequency vibrator 210 with a balun. As a result, the structure of the balun can be eliminated, and the height of the high-frequency vibrator 210 is reduced, thereby making the unit antenna smaller in size and lighter in weight, enriching the use scenarios of the unit antenna.

[0049] Among them, the spacing L1 between the reflector 10 and the second metal sheet 240 reflects the height of the high-frequency vibrator 210. In the present application, the height of the high-frequency vibrator 210 is 15 mm to 25 mm. In the related art, the height of the high-frequency vibrator 210 with a balun structure is generally 30 mm to 40 mm. It can be seen that in the present application, by setting the high-frequency vibrator 210 to the first metal sheet 230 and the second metal sheet 240 arranged at intervals to replace the high-frequency vibrator 210 with a balun structure, the height of the high-frequency vibrator 210 can be greatly reduced.

[0050] In some embodiments, the distance L1 between the reflector 10 and the second metal sheet 240 can be set to 15 mm, 20 mm, 25 mm, or any value therebetween. The size of L1 can be reasonably selected based on the high-frequency operating frequency band of the unit antenna.

[0051] The first metal sheet 230 is a metal sheet close to the reflector 10 , and the second metal sheet 240 is a metal sheet far from the reflector 10 . Generally speaking, the diameter of the first metal sheet 230 is greater than that of the second metal sheet 240 .

[0052] The distance between the first metal sheet 230 and the second metal sheet 240 is positively correlated with the antenna impedance. That is, the larger the distance between the first metal sheet 230 and the second metal sheet 240, the larger the antenna impedance; the smaller the distance between the first metal sheet 230 and the second metal sheet 240, the smaller the antenna impedance.

[0053] In some embodiments, the diameter of the first metal sheet 230 is D1, and the diameter of the second metal sheet 240 is D2, which satisfies: 50 mm ≤ D1 ≤ 70 mm, 20 mm ≤ D2 ≤ 40 mm.

[0054] like Figure 2 As shown, the first metal sheet 230 is set to be circular, and can usually be provided with a roughly trapezoidal notch. The second metal sheet 240 is also set to be circular. Based on the shape design of the first metal sheet 230 and the second metal sheet 240, and in conjunction with the spacing between the first metal sheet 230 and the second metal sheet 240 to change the spacing between the second metal sheet 240 and the reflector 10, it is adapted to the use requirements of different antenna impedances and different high-frequency working frequency bands.

[0055] For example, the diameter D1 of the first metal sheet 230 can be set to 50 mm, 60 mm, 70 mm, or any value therebetween. The diameter D2 of the second metal sheet 240 can be set to 20 mm, 30 mm, 40 mm, or any value therebetween.

[0056] The diameter D1 of the first metal sheet 230 and the diameter D2 of the second metal sheet 240 are negatively correlated with the size of the high-frequency working frequency band. That is, the larger the first metal sheet 230D1 and the second metal sheet 240D2 are, the smaller the high-frequency working frequency band is; the smaller the first metal sheet 230D1 and the second metal sheet 240D2 are, the larger the high-frequency working frequency band is.

[0057] like Figure 3 As shown, in some embodiments, a first protrusion 110 is configured on the reflector 10. The first metal sheet 230 is electrically connected to the reflector 10 through the first protrusion 110. The height of the first protrusion 110 is H1, which satisfies: 2 mm ≤ H1 ≤ 8 mm.

[0058] It can be understood that the first protrusion 110 can, on the one hand, realize the electrical connection between the first metal sheet 230 and the reflecting plate 10, and on the other hand, can enable the first metal sheet 230 and the reflecting plate 10 to be spaced apart to prevent the first metal sheet 230 and the reflecting plate 10 from being electrically connected at locations other than the first protrusion 110 and thus affecting the antenna performance.

[0059] In some embodiments, the first protrusion 110 is also made of metal material, and the first protrusion 110 can be fixed to the reflector 10 by soldering or the like. The first protrusion 110 can be set as a cylindrical protrusion, and the first metal sheet 230 can be connected to the first protrusion 110 by a fastener to achieve mutual fixation between the two.

[0060] It is understandable that the height H1 of the first protrusion 110 can reflect the spacing between the first metal sheet 230 and the reflector 10. When the height H1 of the first protrusion 110 is set to 2 mm to 8 mm, the spacing between the first metal sheet 230 and the reflector 10 is also in the range of 2 mm to 8 mm. When the spacing between the first metal sheet 230 and the reflector 10 is less than 2 mm, the spacing between the first metal sheet 230 and the reflector 10 is too small. Based on the possible deformation, bending and other phenomena of the edge of the first metal sheet 230, the edge of the first metal sheet 230 may contact the reflector 10, causing impedance mismatch and affecting antenna performance. When the spacing between the first metal sheet 230 and the reflector 10 is greater than 8 mm, the spacing between the first metal sheet 230 and the reflector 10 is too large, causing the impedance to increase and making it difficult to match the target value.

[0061] For example, the height H1 of the first protrusion 110 is set to 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, or any value therebetween.

[0062] Please continue reading Figure 3In some embodiments, a first support member 120 is disposed between the first metal sheet 230 and the second metal sheet 240. A first mounting channel is formed in the first support member 120. The first protrusion 110 is configured with a first connection hole. The first metal sheet 230 and the second metal sheet 240 are electrically connected through the first conductive member 130. The first conductive member 130 passes through the first mounting channel and is connected to the first connection hole.

[0063] It is understandable that the first support member 120 is disposed between the first metal sheet 230 and the second metal sheet 240 to achieve the spacing between the first metal sheet 230 and the second metal sheet 240. The first mounting channel in the first support member 120 and the first connection hole of the first protrusion 110 are used to install the first conductive member 130 to achieve electrical connection between the first metal sheet 230, the second metal sheet 240, the first protrusion 110 and the reflector 10.

[0064] In some embodiments, the first conductive member 130 may be a metal screw, and the first connection hole may be configured with an internal thread. The connection end of the first conductive member 130 is inserted into the first mounting channel and is threadedly connected to the first connection hole to fix the first metal sheet 230 and the second metal sheet 240 to the first protruding portion 110. In order to achieve the above-mentioned fixing method, through holes are formed in the middle of the first metal sheet 230 and the second metal sheet 240 for inserting the first conductive member 130. Based on this fixing method, the high-frequency radiation component 20 can be directly fixed to the reflector 10 through the first conductive member 130 without welding, so that the assembly of the high-frequency radiation component 20 is simple.

[0065] The first support member 120 may be made of insulating non-magnetic material to prevent the first support member 120 from electrically connecting the first metal sheet 230 and the second metal sheet 240 to cause a short circuit between the two, and to prevent electromagnetic interference from affecting intermodulation and signal quality.

[0066] The height of the first support member 120 can reflect the distance between the first metal sheet 230 and the second metal sheet 240, and the distance between the first metal sheet 230 and the second metal sheet 240 can change the antenna impedance. Specifically, the antenna impedance is positively correlated with the distance between the first metal sheet 230 and the second metal sheet 240. Specifically, the larger the distance between the first metal sheet 230 and the second metal sheet 240, the larger the antenna impedance; the smaller the distance between the first metal sheet 230 and the second metal sheet 240, the smaller the antenna impedance. Therefore, the first support member 120 of the corresponding height can be selected according to the antenna impedance value in the design stage, so that the distance between the first metal sheet 230 and the second metal sheet 240 meets the design requirements of the antenna impedance.

[0067] like Figure 2As shown, in some embodiments, the high frequency feeding network 220 and the first metal sheet 230 are integrally formed.

[0068] It is understandable that the high-frequency feeding network 220 and the first metal sheet 230 are integrally formed, which can reduce the cables of the high-frequency radiation component 20 and reduce the welding process of the two. Not only can the high-frequency radiation component 20 have good radiation performance, but also the high-frequency radiation component 20 can be made simpler and more beautiful. At the same time, the one-piece high-frequency radiation component 20 is also easy to process and can be produced at low cost by stamping. Compared with the die-casting method used in the traditional solution, the one-piece stamped high-frequency feeding network 220 and the first metal sheet 230 can save mold opening costs on the one hand, and make the high-frequency radiation component 20 lighter on the other hand, which is conducive to the lightweight design of the antenna.

[0069] The high-frequency feeding network 220 and the first metal sheet 230 are integrally formed, and the high-frequency feeding network 220 and the radiator are combined into one, which can not only enhance the strength of the antenna, significantly reduce the number of solder joints of the antenna, but also avoid the problem of soldering adaptation caused by multiple solder joints of the PCB antenna. In addition, the integrated high-frequency feeding network 220 and the radiator can also reduce material costs and processing complexity, which is conducive to mass production.

[0070] For example, the high-frequency feeding network 220 is configured as a metal strip, so that the high-frequency feeding network 220 can be integrally formed with the first metal sheet 230 and realize the air microstrip structure of the high-frequency feeding network 220 .

[0071] A high-frequency signal input port and a high-frequency signal output port are formed on the high-frequency feeding network 220. The high-frequency signal input port can be arranged at the center of the high-frequency feeding network 220, and the high-frequency signal output port can be arranged at a position of the high-frequency feeding network 220 close to the first metal sheet 230. The high-frequency feeding network 220 can be formed with a via hole at the high-frequency signal input port, and the via hole can be used to weld the inner conductor of the high-frequency coaxial connecting line, so that the high-frequency feeding network 220 is electrically connected to the high-frequency feeding port 410 of the combiner 40 through the high-frequency coaxial connecting line.

[0072] In an embodiment of the present application, the width of the high-frequency feeding network 220 is negatively correlated with the port impedance. That is, the larger the width of the high-frequency feeding network 220, the smaller the port impedance; the smaller the width of the high-frequency feeding network 220, the larger the wide-mouth impedance. In the design stage, a high-frequency feeding network 220 of corresponding width can be selected based on the port impedance. The length of the high-frequency feeding network 220 is set in the range of 70 mm to 110 mm, and the length of the high-frequency feeding network 220 can also be reasonably selected according to the port impedance, antenna impedance, working frequency band, etc. of the high-frequency feeding network 220. For example, the length of the high-frequency feeding network 220 is set to 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, or any value between the two.

[0073] like Figure 2 and Figure 3 As shown, in some embodiments, the low frequency oscillator 310 includes a third metal sheet 330 and a fourth metal sheet 340 that are spaced apart. The third metal sheet 330 is electrically connected to the fourth metal sheet 340. The fourth metal sheet 340 is located on a side of the third metal sheet 330 away from the reflector 10. The distance between the reflector 10 and the fourth metal sheet 340 is L2, which satisfies: 20 mm ≤ L2 ≤ 40 mm.

[0074] It is understandable that in the traditional antenna structure, the low-frequency vibrator 310 of the low-frequency radiation component 30 is usually electrically connected to the reflector 10 using a balun, and the impedance of the antenna is adjusted using the balun. The design based on the balun is to facilitate the rapid adjustment of the antenna impedance. However, the height of the balun is relatively large, resulting in a large height of the low-frequency vibrator 310. This causes the overall size of the antenna to be larger and the weight to be heavier, which limits the use scenario of the antenna. In the present application, the low-frequency vibrator 310 is formed by a third metal sheet 330 and a fourth metal sheet 340 to replace the traditional low-frequency vibrator 310 with a balun. As a result, the structure of the balun can be cancelled, and the height of the low-frequency vibrator 310 is reduced, so that the unit antenna is smaller in size and lighter in weight, enriching the use scenarios of the unit antenna.

[0075] Among them, the spacing L2 between the reflector 10 and the fourth metal sheet 340 reflects the height of the low-frequency vibrator 310. In the present application, the height of the low-frequency vibrator 310 is 20 mm to 40 mm. In the related art, the height of the low-frequency vibrator 310 with a balun structure is generally 60 mm to 80 mm. It can be seen that in the present application, by setting the low-frequency vibrator 310 to the third metal sheet 330 and the fourth metal sheet 340 arranged at intervals to replace the low-frequency vibrator 310 with a balun structure, the height of the low-frequency vibrator 310 can be greatly reduced.

[0076] In some embodiments, the distance L2 between the reflector 10 and the fourth metal sheet 340 can be set to 20 mm, 30 mm, 40 mm, or any value therebetween. The size of L2 can be reasonably selected based on the low-frequency operating band of the unit antenna.

[0077] The third metal sheet 330 is a metal sheet close to the reflector 10 , and the fourth metal sheet 340 is a metal sheet far from the reflector 10 . Generally speaking, the diameter of the third metal sheet 330 is greater than that of the fourth metal sheet 340 .

[0078] The distance between the third metal sheet 330 and the fourth metal sheet 340 is positively correlated with the antenna impedance. That is, the larger the distance between the third metal sheet 330 and the fourth metal sheet 340, the larger the antenna impedance; the smaller the distance between the third metal sheet 330 and the fourth metal sheet 340, the smaller the antenna impedance.

[0079] In some embodiments, the diameter of the third metal sheet 330 is D3, and the diameter of the fourth metal sheet 340 is D4, which satisfies: 210 mm ≤ D3 ≤ 240 mm, 150 mm ≤ D4 ≤ 180 mm.

[0080] like Figure 2 As shown, the third metal sheet 330 is set to be circular, and can usually be provided with a roughly trapezoidal notch. The fourth metal sheet 340 is also set to be circular. Based on the shape design of the third metal sheet 330 and the fourth metal sheet 340, and in conjunction with the spacing between the third metal sheet 330 and the fourth metal sheet 340 to change the spacing between the fourth metal sheet 340 and the reflector 10, it is adapted to the use requirements of different antenna impedances and different low-frequency working bands.

[0081] For example, the diameter D3 of the third metal sheet 330 can be set to 210 mm, 220 mm, 230 mm, 240 mm, or any value therebetween. The diameter D4 of the fourth metal sheet 340 can be set to 150 mm, 160 mm, 170 mm, 180 mm, or any value therebetween.

[0082] The diameter D3 of the third metal sheet 330 and the diameter D4 of the fourth metal sheet 340 are negatively correlated with the size of the low-frequency working frequency band. That is, the larger the third metal sheet 330D3 and the fourth metal sheet 340D4 are, the smaller the high-frequency working frequency band is; the smaller the third metal sheet 330D3 and the fourth metal sheet 340D4 are, the larger the high-frequency working frequency band is.

[0083] like Figure 3As shown, in some embodiments, the reflector 10 is further provided with a second protrusion 140. The third metal sheet 330 is electrically connected to the reflector 10 via the second protrusion 140. The height of the second protrusion 140 is H2, which satisfies: 2 mm ≤ H2 ≤ 8 mm.

[0084] It can be understood that the second protrusion 140 can, on the one hand, realize the electrical connection between the third metal sheet 330 and the reflector 10, and on the other hand, can enable the third metal sheet 330 and the reflector 10 to be spaced apart to prevent the third metal sheet 330 from being electrically connected to the reflector 10 at locations other than the second protrusion 140 and thus affecting the antenna performance.

[0085] In some embodiments, the second protrusion 140 is also made of metal material, and the second protrusion 140 can be fixed to the reflector 10 by soldering or the like. The second protrusion 140 can be set as a cylindrical protrusion, and the third metal sheet 330 can be connected to the second protrusion 140 by a fastener to achieve mutual fixation between the two.

[0086] It is understandable that the height H2 of the second protrusion 140 can reflect the spacing between the third metal sheet 330 and the reflector 10. When the height H2 of the second protrusion 140 is set to 2 mm to 8 mm, the spacing between the third metal sheet 330 and the reflector 10 is also in the range of 2 mm to 8 mm. When the spacing between the third metal sheet 330 and the reflector 10 is less than 2 mm, the spacing between the third metal sheet 330 and the reflector 10 is too small. Based on the possibility of deformation, bending, etc. at the edge of the third metal sheet 330, the edge of the third metal sheet 330 may contact the reflector 10, causing impedance mismatch and affecting antenna performance. When the spacing between the third metal sheet 330 and the reflector 10 is greater than 8 mm, the spacing between the third metal sheet 330 and the reflector 10 is too large, causing the impedance to increase and making it difficult to match the target value.

[0087] For example, the height H2 of the second protrusion 140 is set to 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, or any value therebetween.

[0088] Please continue reading Figure 3 In some embodiments, a second support member 150 is disposed between the third metal sheet 330 and the fourth metal sheet 340. A second mounting channel is formed in the second support member 150. The second protrusion 140 is configured with a second connection hole. The third metal sheet 330 and the fourth metal sheet 340 are electrically connected through the second conductive member 160. The second conductive member 160 passes through the second mounting channel and is connected to the second connection hole.

[0089] It is understandable that the second support member 150 is disposed between the third metal sheet 330 and the fourth metal sheet 340 to achieve the spacing between the third metal sheet 330 and the fourth metal sheet 340. The second mounting channel in the second support member 150 and the second connection hole of the second protrusion 140 are used to install the second conductive member 160 to achieve electrical connection between the third metal sheet 330, the fourth metal sheet 340, the second protrusion 140 and the reflector 10.

[0090] In some embodiments, the second conductive member 160 may be a metal screw, and the second connection hole may be configured with an internal thread. The connection end of the second conductive member 160 is inserted into the second mounting channel and is threadedly connected to the second connection hole to fix the third metal sheet 330 and the fourth metal sheet 340 to the second protruding portion 140. In order to achieve the above fixing method, through holes are formed in the middle of the third metal sheet 330 and the fourth metal sheet 340 for inserting the second conductive member 160. Based on this fixing method, the low-frequency radiation component 30 can be directly fixed to the reflector 10 through the second conductive member 160 without welding, so that the assembly of the low-frequency radiation component 30 is simple.

[0091] The second support member 150 can be made of insulating non-magnetic material to prevent the second support member 150 from electrically connecting the third metal sheet 330 and the fourth metal sheet 340 to cause a short circuit between the two, and to prevent electromagnetic interference from affecting intermodulation and signal quality.

[0092] The height of the second support member 150 can reflect the distance between the third metal sheet 330 and the fourth metal sheet 340, and the distance between the third metal sheet 330 and the fourth metal sheet 340 can change the antenna impedance. Specifically, the antenna impedance is positively correlated with the distance between the third metal sheet 330 and the fourth metal sheet 340. Specifically, the larger the distance between the third metal sheet 330 and the fourth metal sheet 340, the larger the antenna impedance; the smaller the distance between the third metal sheet 330 and the fourth metal sheet 340, the smaller the antenna impedance. Therefore, the second support member 150 of the corresponding height can be selected according to the antenna impedance value in the design stage, so that the distance between the third metal sheet 330 and the fourth metal sheet 340 meets the design requirements of the antenna impedance.

[0093] like Figure 2 As shown, in some embodiments, the low frequency feeding network 320 and the third metal sheet 330 are integrally formed.

[0094] It is understandable that the low-frequency feeding network 320 and the third metal sheet 330 are integrally formed, which can reduce the cables of the low-frequency radiation component 30 and reduce the welding process of the two. Not only can the low-frequency radiation component 30 have good radiation performance, but also the low-frequency radiation component 30 can be made simpler and more beautiful. At the same time, the one-piece low-frequency radiation component 30 is also easy to process and can be produced at low cost by stamping. Compared with the die-casting method used in the traditional solution, the one-piece stamped low-frequency feeding network 320 and the third metal sheet 330 can save mold opening costs on the one hand, and make the low-frequency radiation component 30 lighter on the other hand, which is conducive to the lightweight design of the antenna.

[0095] The low-frequency feed network 320 and the third metal sheet 330 are integrally formed, and the low-frequency feed network 320 and the radiator are combined into one, which can not only enhance the strength of the antenna, significantly reduce the number of solder joints of the antenna, but also avoid the problem of soldering adaptation caused by multiple solder joints of the PCB antenna. In addition, the integrated low-frequency feed network 320 and the radiator can also reduce material costs and processing complexity, which is conducive to mass production.

[0096] For example, the low frequency feeding network 320 is configured as a metal strip, so that the low frequency feeding network 320 can be integrally formed with the third metal sheet 330 and realize the air microstrip structure of the low frequency feeding network 320 .

[0097] A low-frequency signal input port and a low-frequency signal output port are formed on the low-frequency feeding network 320. The low-frequency signal input port can be arranged at the center of the low-frequency feeding network 320, and the low-frequency signal output port can be arranged at a position of the low-frequency feeding network 320 close to the third metal sheet 330. The low-frequency feeding network 320 can be formed with a via hole at the low-frequency signal input port, and the via hole can be used to weld the inner conductor of the low-frequency coaxial connecting line, so that the low-frequency feeding network 320 is electrically connected to the low-frequency feeding port 420 of the combiner 40 through the low-frequency coaxial connecting line.

[0098] In an embodiment of the present application, the width of the low-frequency feed network 320 is negatively correlated with the port impedance. That is, the larger the width of the low-frequency feed network 320, the smaller the port impedance; the smaller the width of the low-frequency feed network 320, the larger the wide-mouth impedance. In the design stage, a low-frequency feed network 320 of corresponding width can be selected based on the port impedance. The length of the low-frequency feed network 320 is set in the range of 340 mm to 400 mm, and the length of the low-frequency feed network 320 can also be reasonably selected according to the port impedance, antenna impedance, working frequency band, etc. of the low-frequency feed network 320. For example, the length of the low-frequency feed network 320 is set to 340 mm, 360 mm, 380 mm, 400 mm, or any value between the two.

[0099] In some embodiments, the high frequency feeding network 220 has two feeding ports, and the phase difference between the two feeding ports of the high frequency feeding network 220 is Φ1. The power ratio between the two feeding ports of the high frequency feeding network 220 is Y1. It satisfies: -10°≤Φ1≤10°, Y1=1: (1~1.2).

[0100] It can be understood that based on controlling the phase difference Φ1 of the two feeding ports of the high-frequency feeding network 220 within the range of -10° to 10°, the power ratio Y1 is set within the range of 1:(1~1.2) to prevent the gain of the antenna from deteriorating and ensure the gain effect of the antenna.

[0101] For example, the phase difference Φ1 between the two feeding ports of the high-frequency feeding network 220 is set to -10°, 0°, 10°, or any value therebetween. In the embodiment of the present application, the phase difference Φ1 between the two feeding ports of the high-frequency feeding network 220 is preferably set to 0°.

[0102] For example, the power ratio Y1 between the two feeding ports of the high frequency feeding network 220 is set to 1:1, 1:1.1, 1:1.2, or any ratio therebetween. In the embodiment of the present application, the power ratio Y1 between the two feeding ports of the high frequency feeding network 220 is preferably set to 1:1.

[0103] The phase difference between the two feeding ports of the high frequency feeding network 220 can be adjusted by adjusting the length of the high frequency feeding network 220. The power ratio between the two feeding ports of the high frequency feeding network 220 can be adjusted by adjusting the width of the high frequency feeding network 220.

[0104] In some embodiments, the low frequency feeding network 320 has two feeding ports, and the phase difference between the two feeding ports of the low frequency feeding network 320 is Φ2. The power ratio between the two feeding ports of the low frequency feeding network 320 is Y2. It satisfies: -10°≤Φ2≤10°, Y2=1: (1~1.2).

[0105] It can be understood that based on controlling the phase difference Φ2 of the two feeding ports of the low-frequency feeding network 320 within the range of -10° to 10°, the power ratio Y2 is set within the range of 1:(1~1.2) to prevent the gain of the antenna from deteriorating and ensure the gain effect of the antenna.

[0106] For example, the phase difference Φ2 between the two feeding ports of the low frequency feeding network 320 is set to -10°, 0°, 10°, or any value therebetween. In the embodiment of the present application, the phase difference Φ2 between the two feeding ports of the low frequency feeding network 320 is preferably set to 0°.

[0107] For example, the power ratio Y2 between the two feeding ports of the low frequency feeding network 320 is set to 1:1, 1:1.1, 1:1.2, or any ratio therebetween. In the embodiment of the present application, the power ratio Y2 between the two feeding ports of the low frequency feeding network 320 is preferably set to 1:1.

[0108] The phase difference between the two feeding ports of the low frequency feeding network 320 can be adjusted by adjusting the length of the low frequency feeding network 320. The power ratio between the two feeding ports of the low frequency feeding network 320 can be adjusted by adjusting the width of the low frequency feeding network 320.

[0109] like Figure 4 As shown, in some embodiments, the unit antenna further includes a combiner 40. The combiner 40 is disposed on the second side of the reflector 10. The combiner 40 is electrically connected to the high frequency feeding network 220 and the low frequency feeding network 320.

[0110] The unit antenna forms a combined antenna based on the configuration of the combiner 40. The combiner 40 can combine signals of different frequency bands into one channel and transmit them through one feeder line, thereby saving feeder line resources.

[0111] Among them, the combiner 40 is a combiner 40 of a microstrip line structure. The length and width of the microstrip line in the combiner 40 are negatively correlated with the antenna impedance. Specifically, the longer the length of the microstrip line in the combiner 40, the smaller the antenna impedance; the smaller the length of the microstrip line in the combiner 40, the larger the antenna impedance; the larger the width of the microstrip line in the combiner 40, the smaller the antenna impedance; the smaller the width of the microstrip line in the combiner 40, the larger the antenna impedance. Based on the combiner 40 using a microstrip line structure, compared with the combiner 40 of a box structure, the weight and price of the combiner 40 can be reduced, which is conducive to the lightweight and low-cost design of the antenna.

[0112] Specifically, the combiner 40 of the microstrip line structure includes a dielectric substrate and a metal copper-clad layer arranged on both sides of the dielectric substrate. Among them, the dielectric substrate may be provided with fixing holes, and the fixing holes may be provided with fasteners such as rivets and screws, so that the dielectric substrate is fixed to the reflector 10 through the fasteners and the fixing holes, so as to achieve a reliable connection between the dielectric substrate and the reflector 10. The combiner 40 is provided with a plurality of ports, each of which is provided with a pad for welding a coaxial connecting line.

[0113] The dielectric substrate can also be electrically connected to the grounding member 190 of the reflector 10 through a high-frequency coaxial connecting wire, and can also be electrically connected to the grounding member 190 of the reflector 10 through a low-frequency coaxial connecting wire. The high-frequency coaxial connecting wire and the low-frequency coaxial connecting wire can be welded to the grounding member 190, thereby playing the role of grounding and fixing the cable.

[0114] like Figure 5 As shown, in some embodiments, the combiner 40 has a high frequency feed port 410, a low frequency feed port 420 and a main feed port 430. The high frequency feed port 410 is electrically connected to the high frequency feed network 220. The low frequency feed port 420 is electrically connected to the low frequency feed network 320. The main feed port 430 is configured to be electrically connected to the RF connector 50.

[0115] It is understandable that the combiner 40 is electrically connected to the high frequency feeding network 220 based on the high frequency feeding port 410, the combiner 40 is electrically connected to the low frequency feeding network 320 based on the low frequency feeding port 420, and the combiner 40 is electrically connected to the RF connector 50 based on the main feeding port 430. Among them, the above three electrical connections can be achieved through coaxial connecting wires. For example, the high frequency feeding port 410 is electrically connected to the high frequency feeding network 220 through a high frequency coaxial connecting wire.

[0116] The radio frequency connector 50 can play the role of signal input and signal output. For example, the radio frequency connector 50 is connected to the signal interface of the signal transmission tower.

[0117] The high frequency feed port 410 and the low frequency feed port 420 are both provided with open branches. The open branches of the high frequency feed port 410 are used to filter low frequency signals, and the open branches of the low frequency feed port 420 are used to filter high frequency signals.

[0118] like Figure 1 and Figure 3 As shown, in some embodiments, both opposite ends of the reflective plate 10 are provided with flanges 170 bent toward the second side of the reflective plate 10. A reinforcing member 180 is further connected between the flange 170 and the reflective plate 10.

[0119] It is understandable that the reinforcement 180 can have a structural reinforcement effect on the flange 170 and the reflector 10, preventing the flange 170 from deforming and compressing the components inside / outside the antenna.

[0120] The reinforcing member 180 may be configured as an inclined plate. The two ends of the reinforcing member 180 are respectively connected to the flange 170 and the reflector 10, and the connection methods include but are not limited to welding, fastener connection, bonding, etc., to ensure that the reinforcing member 180, the flange 170 and the reflector 10 form a stable and reliable connection.

[0121] like Figure 1 As shown, the embodiment of the present application further provides an antenna structure. The antenna structure includes at least three unit antennas as in the above-mentioned embodiment. Among them, at least three reflectors 10 are connected end to end in sequence, and the first side of the reflector 10 is the side of the reflector 10 away from the internal cavity.

[0122] In the embodiment of the present application, by making at least one of the oscillator and the feeding network adopt an air microstrip structure and using air as the propagation medium, the loss of electromagnetic waves propagating in the medium can be reduced, thereby reducing the loss of the unit antenna itself and improving the gain of the antenna array.

[0123] The two adjacent reflectors 10 may be connected by fasteners such as screws, or by welding or bonding, to ensure a stable and reliable connection between the reflectors 10. The reflectors 10, high-frequency radiation components 20, low-frequency radiation components 30 and combiners 40 of at least three unit antennas are identical.

[0124] In some embodiments, the antenna structure may include four reflectors 10. The four reflectors 10 are connected end to end, and each two adjacent reflectors 10 are perpendicular to each other. That is, the cross section of the antenna structure is set to a square. Thus, the antenna structure can receive high-frequency signals and low-frequency signals in a 360-degree range through the high-frequency radiation components 20 and the low-frequency radiation components 30 on the four reflectors 10, thereby achieving full coverage of the signal reception angle.

[0125] In some embodiments, the antenna structure may include four reflectors 10. The four reflectors 10 are connected end to end, and two adjacent reflectors 10 may be arranged at an acute angle or an obtuse angle. That is, the cross section of the antenna structure is set to a parallelogram. At this time, the high-frequency radiation components 20 and the low-frequency radiation components 30 on the four reflectors 10 may also be used to receive high-frequency signals and low-frequency signals in a 360-degree range, thereby achieving full coverage of the signal reception angle.

[0126] In some embodiments, the antenna structure may further include three reflective plates 10, six reflective plates 10, or eight reflective plates 10. The number of reflective plates 10 may be selected based on design requirements.

[0127] The antenna structure in the embodiment of the present application is particularly suitable for use as a combined antenna. The combined antenna can achieve full coverage and has the characteristics of low profile, high gain, etc.

[0128] Based on the high-frequency feeding network 220 and the first metal sheet 230 being integrally formed, the low-frequency feeding network 320 and the third metal sheet 330 being integrally formed, the antenna structure in the embodiment of the present application can have the advantages of being simple and beautiful, easy to assemble, and low cost. Since the high-frequency vibrator 210, the high-frequency feeding network 220, the low-frequency vibrator 310, and the low-frequency feeding network 320 are made of metal, the metal sheet and the feeding network can be formed by integral stamping. Compared with the die-casting used in the related art, the weight of the high-frequency radiation component 20 and the low-frequency radiation component 30 can be reduced, so that the antenna structure also has the advantage of being light in weight. Figure 6 An efficiency graph of an antenna structure formed with four unit antennas is shown. Figure 6The horizontal axis is Frequency (frequency), the unit is MHz (megahertz), and the vertical axis is Efficiency (efficiency). Figure 7 A peak gain curve diagram of an antenna structure formed with four element antennas is shown. Figure 7 The horizontal axis is Frequency, in MHz, and the vertical axis is Peak Gain, in dBi. As can be seen from the figure, the low-frequency efficiency of this antenna structure is as high as 78%, the high-frequency efficiency is as high as 62%, the low-frequency peak gain is 10.4dBi, and the high-frequency peak gain is 11dBi. It can be seen that this antenna structure also has the advantage of high performance.

[0129] The above is a detailed introduction to a unit antenna and antenna structure provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A unit antenna, characterized in that: include: Reflective panels; The radiation component is arranged on the first side of the reflection plate, and the radiation component includes an oscillator and a feeding network, and at least one of the oscillator and the feeding network adopts an air microstrip structure.

2. The unit antenna according to claim 1, characterized in that: The radiation component includes a high-frequency radiation component and a low-frequency radiation component, the high-frequency radiation component includes a high-frequency oscillator and a high-frequency feeding network connected to each other, and at least one of the high-frequency oscillator and the high-frequency feeding network adopts an air microstrip structure; and / or, the low-frequency radiation component includes a low-frequency oscillator and a low-frequency feeding network connected to each other, and at least one of the low-frequency oscillator and the low-frequency feeding network adopts an air microstrip structure.

3. The unit antenna according to claim 2, characterized in that: The high-frequency oscillator includes a first metal sheet and a second metal sheet arranged at an interval, the first metal sheet is electrically connected to the second metal sheet, wherein the second metal sheet is located on a side of the first metal sheet away from the reflective plate, and the distance between the reflective plate and the second metal sheet is L1, satisfying: 15 mm ≤ L1 ≤ 25 mm.

4. The unit antenna according to claim 3, characterized in that: The diameter of the first metal sheet is D1, and the diameter of the second metal sheet is D2, which satisfies: 50 mm ≤ D1 ≤ 70 mm, 20 mm ≤ D2 ≤ 40 mm.

5. The unit antenna according to claim 3, characterized in that: A first protrusion is configured on the reflection plate, wherein the first metal sheet is electrically connected to the reflection plate via the first protrusion, and a height of the first protrusion is H1, which satisfies: 2 mm ≤ H1 ≤ 8 mm.

6. The unit antenna according to claim 5, characterized in that: A first supporting member is arranged between the first metal sheet and the second metal sheet, a first mounting channel is formed in the first supporting member, a first protrusion is configured with a first connecting hole, the first metal sheet and the second metal sheet are electrically connected through a first conductive member, the first conductive member passes through the first mounting channel, and is connected to the first connecting hole.

7. The unit antenna according to claim 3, characterized in that: The high-frequency feeding network is integrally formed with the first metal sheet.

8. The unit antenna according to claim 2, characterized in that: The low-frequency vibrator includes a third metal sheet and a fourth metal sheet that are spaced apart, the third metal sheet being electrically connected to the fourth metal sheet, wherein the fourth metal sheet is located on a side of the third metal sheet that is away from the reflective plate, and a distance between the reflective plate and the fourth metal sheet is L2, satisfying: 20 mm ≤ L2 ≤ 40 mm.

9. The unit antenna according to claim 8, characterized in that: The diameter of the third metal sheet is D3, and the diameter of the fourth metal sheet is D4, which satisfies: 210 mm ≤ D3 ≤ 240 mm, 150 mm ≤ D4 ≤ 180 mm.

10. The unit antenna according to claim 8, characterized in that: The reflective plate is also provided with a second protrusion, wherein the third metal sheet is electrically connected to the reflective plate via the second protrusion, and a height of the second protrusion is H2, which satisfies: 2 mm ≤ H2 ≤ 8 mm.

11. The unit antenna according to claim 10, characterized in that: A second supporting member is arranged between the third metal sheet and the fourth metal sheet, a second mounting channel is formed in the second supporting member, a second protrusion is configured with a second connecting hole, the third metal sheet and the fourth metal sheet are electrically connected through a second conductive member, the second conductive member passes through the second mounting channel and is connected to the second connecting hole.

12. The unit antenna according to claim 8, characterized in that: The low-frequency feeding network and the third metal sheet are formed integrally.

13. The unit antenna according to any one of claims 2 to 12, characterized in that: The high-frequency feeding network has two feeding ports, the phase difference between the two feeding ports of the high-frequency feeding network is Φ1, and the power ratio between the two feeding ports of the high-frequency feeding network is Y1, which satisfies: -10°≤Φ1≤10°, Y1=1:(1~1.2).

14. The unit antenna according to any one of claims 2 to 12, characterized in that: The low-frequency feeding network has two feeding ports, the phase difference between the two feeding ports of the low-frequency feeding network is Φ2, the power ratio between the two feeding ports of the low-frequency feeding network is Y2, and satisfies: -10°≤Φ2≤10°, Y2=1: (1~1.2).

15. The unit antenna according to any one of claims 2 to 12, characterized in that: The unit antenna also includes: A combiner is arranged on the second side of the reflection plate, and the combiner is electrically connected to the high-frequency feeding network and the low-frequency feeding network.

16. The unit antenna according to claim 15, characterized in that: The combiner has a high-frequency feed port, a low-frequency feed port and a main feed port, the high-frequency feed port is electrically connected to the high-frequency feed network, the low-frequency feed port is electrically connected to the low-frequency feed network, and the main feed port is configured to be electrically connected to a radio frequency connector.

17. The unit antenna according to any one of claims 1 to 12, characterized in that: Both opposite ends of the reflective plate are provided with flanges bent toward the second side of the reflective plate, and a reinforcing member is connected between the flange and the reflective plate.

18. An antenna structure, characterized in that: It comprises at least three unit antennas according to any one of claims 1 to 17, wherein at least three reflecting plates are sequentially connected end to end, and the first side of the reflecting plate is a side of the reflecting plate away from the internal cavity.

Images