An antenna

Abstract

The present invention discloses an antenna, belonging to the field of antenna technology. The antenna comprises a first feeding network, a reflecting plate and a radiating unit, wherein the reflecting plate is arranged between the first feeding network and the radiating unit, the reflecting plate is provided with a window, the first feeding network is provided with an electrical connection portion protruding into the window, and the first feeding network is directly electrically connected to the radiating unit through the electrical connection portion. The present invention can electrically connect the feeding network and the radiating unit located on both sides of the reflecting plate without using cables, thereby simplifying the antenna structure while reducing antenna loss and improving antenna performance.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and in particular to an antenna. Background Art

[0002] Antenna is a component for transmitting or receiving electromagnetic waves. It is widely used in systems such as radio and television, point-to-point radio communication, radar and space exploration. It is an indispensable part of wireless communication. At present, the antenna generally includes a radiating unit, a front feeding network, a reflector, a back feeding network, and a radome for protecting the antenna. Among them, the radiating unit and the front feeding network are arranged on the front of the reflector, and the back feeding network is arranged on the back of the reflector. Taking the back feeding network including a phase shifter as an example, when the phase shifter is connected to the radiating unit or the front feeding network, the phase shifter is connected to the radiating unit or the front feeding network through a cable. When connected, the inner conductor and the outer conductor are DC connected by welding. However, this method has a higher loss of the feeding network due to the use of more cables. In addition, in some antennas, when the phase shifter is connected to the radiating unit or the front feeding network, the phase shifter is first coupled to the reflector, and the reflector is then coupled to the radiating unit or the front feeding network. However, this method can bring many resonances and affect the performance of the antenna.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] An object of the present invention is to provide an antenna which can electrically connect a feeding network and a radiating unit located on both sides of a reflector without using cables, thereby simplifying the antenna structure and reducing antenna loss.

[0005] To achieve the above-mentioned purpose, an embodiment of the present invention provides an antenna, including a first feeding network, a reflecting plate and a radiating unit, wherein the reflecting plate is arranged between the first feeding network and the radiating unit, the reflecting plate is provided with a window, the first feeding network is provided with an electrical connection portion protruding into the window, and the first feeding network is directly electrically connected to the radiating unit through the electrical connection portion. By providing a window and an electrical connection portion on the reflecting plate, the first feeding network is directly electrically connected to the radiating unit, which can avoid the problems caused by connecting the two using a cable, simplify the antenna structure and reduce the antenna loss.

[0006] In one or more embodiments of the present invention, the radiation unit includes a radiation element and a second feeding network which are electrically connected to each other, and the first feeding network is directly electrically connected to the second feeding network through the electrical connection portion.

[0007] In one or more embodiments of the present invention, the first feeding network includes a cavity and a signal processing circuit disposed in the cavity, the second feeding network includes a conductive portion and a grounding portion, the electrical connection portion includes a protrusion disposed in the cavity and a feeding conductor disposed in the protrusion, the feeding conductor connects the signal processing circuit and the conductive portion, and the protrusion is electrically connected to the grounding portion. By arranging a protrusion on the cavity and arranging a feeding conductor on the protrusion to form an electrical connection portion, the protrusion in the electrical connection portion and the feeding conductor constitute an air strip line structure, and the radiation unit is connected to the first feeding network through the air strip line, which can reduce the loss of the antenna and improve the gain of the antenna.

[0008] In one or more embodiments of the present invention, the surface of the protrusion facing the radiation unit and the surface of the reflector facing the radiation unit are in the same plane to form a mounting surface, and the second feeding network is arranged on the mounting surface. By arranging the surface of the protrusion and the surface of the reflector coplanarly, and installing the second feeding network on the coplanar mounting surface, deformation of the second feeding network can be avoided, thereby increasing the service life of the second feeding network.

[0009] In one or more embodiments of the present invention, a first insulating medium is provided between the cavity and the reflector. By providing the first insulating medium, a coupling connection is formed between the cavity and the reflector, and welding and other screw and welding work can be avoided, which facilitates installation and reduces PIM risks.

[0010] In one or more embodiments of the present invention, a second insulating medium is provided between the mounting surface and the grounding portion, and the second insulating medium is preferably a liquid photoresist. By providing the second insulating medium, a coupling connection is formed between the grounding portion and the raised portion, which can avoid the work of installing screws and welding, facilitates installation, and reduces the risk of PIM.

[0011] In one or more embodiments of the present invention, the protrusion is coupled to the ground portion, and the coupling area is not less than 300 mm 2 .

[0012] In one or more embodiments of the present invention, in the width direction of the reflection plate, the width of the protrusion is not less than 15 mm, and in the length direction of the phase shifter, the length of the protrusion is not less than 20 mm.

[0013] In one or more embodiments of the present invention, the width of the protrusion is not less than 20 mm, and the length of the protrusion is not less than 40 mm.

[0014] In one or more embodiments of the present invention, the grounding portion is at least partially coupled to the reflector plate. Through the coupling connection, the work of installing screws and welding can be avoided, which facilitates installation and reduces PIM risks.

[0015] In one or more embodiments of the present invention, in the width direction of the reflective plate, the minimum distance between the edge of the window and the edge of the protruding portion is not less than 1 mm.

[0016] In one or more embodiments of the present invention, when the frequency of the antenna is high frequency, the minimum distance between the edge of the window and the edge of the protrusion in the length direction of the reflector is not less than 3 mm.

[0017] In one or more embodiments of the present invention, when the frequency of the antenna is high frequency, the minimum distance between the edge of the window and the edge of the protrusion in the length direction of the reflector is not less than 6 mm.

[0018] In one or more embodiments of the present invention, when the frequency of the antenna is low, the minimum distance between the edge of the window and the edge of the protrusion in the length direction of the reflector is not less than 15 mm.

[0019] In one or more embodiments of the present invention, when the frequency of the antenna is low, the minimum distance between the edge of the window and the edge of the protrusion in the length direction of the reflector is not less than 30 mm.

[0020] In one or more embodiments of the present invention, the radiation unit includes a radiation oscillator, and the first feeding network is directly electrically connected to the radiation oscillator through the electrical connection portion. By providing a window and an electrical connection portion on the reflector, the first feeding network is directly electrically connected to the radiation oscillator, which can avoid the problems caused by connecting the two using a cable, simplify the antenna structure and reduce antenna loss.

[0021] In one or more embodiments of the present invention, the first feeding network includes a cavity and a signal processing circuit disposed in the cavity, the electrical connection portion includes a protrusion disposed in the cavity and a feeding conductor disposed in the protrusion, the feeding conductor connects the signal processing circuit and the radiating element, and the protrusion is electrically connected to the ground of the radiating element. By arranging a protrusion on the cavity and arranging a feeding conductor on the protrusion to form an electrical connection portion, the protrusion in the electrical connection portion and the feeding conductor constitute an air strip line structure, and the radiating element is connected to the first feeding network through the air strip line, the loss of the antenna can be reduced and the gain of the antenna can be improved.

[0022] In one or more embodiments of the present invention, the first feeding network is selected from a power divider, a phase shifter, and a combiner.

[0023] Compared with the prior art, (1) the present invention provides a window on the reflector and an electrical connection portion protruding into the window on the cavity of the first feeding network, so that the first feeding network can be directly electrically connected to the radiating unit, and the feeding network and the radiating unit located on both sides of the reflector can be electrically connected without using cables, thereby simplifying the antenna structure and reducing the antenna loss.

[0024] (2) The present invention enables the first feeding network to be directly electrically connected to the radiating element or the second feeding network through an electrical connection portion. The protrusion in the electrical connection portion and the feeding conductor form an air strip line structure. The first feeding network is directly electrically connected to the radiating element or the second feeding network through the electrical connection portion through the air strip line, thereby reducing the loss of the antenna and improving the gain of the antenna.

[0025] (3) The present invention provides a window on the reflector so that the protrusion in the electrical connection portion is directly coupled and connected to the ground of the second feeding network or the radiating oscillator, thereby effectively reducing resonance.

[0026] (4) The present invention can effectively reduce resonance by providing a window on the reflector and ensuring that the edge of the window and the edge of the protrusion meet a predetermined condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a stereogram of an antenna according to an embodiment of the present invention;

[0028] Figure 2 is a stereoscopic diagram of an antenna with part of the radiation unit removed according to an embodiment of the present invention;

[0029] Figure 3 is a cross-sectional view of an antenna according to an embodiment of the present invention;

[0030] Figure 4 is a cross-sectional view of a feed network according to an embodiment of the present invention;

[0031] Figure 5 is a schematic diagram of the relationship between the window and the protrusion according to an embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of antenna frequency comparison during direct coupling and indirect coupling according to an embodiment of the present invention;

[0033] Figure 7 is a schematic diagram of the relationship between the window and the antenna frequency according to an embodiment of the present invention;

[0034] Figure 8 It is a schematic diagram of direct connection between a first feeding network and a radiating element according to an implementation mode of the present invention.

[0035] Description of main reference numerals:

[0036] 10-reflecting plate, 10a-first end face, 10b-second end face, 11-window, 111-, 20-radiating unit, 21-radiating oscillator, 21a-oscillator, 21b-feeding balun, 22-second feeding network, 22a-conductive part, 22b-grounding part, 22c-dielectric substrate, 30-first feeding network, 30a-cavity, 30b-signal processing circuit, 31-electrical connecting part, 31a-protruding part, 31b-feeding conductor, 40-first insulating medium, S1-surface, S2-surface. DETAILED DESCRIPTION

[0037] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0038] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0039] like Figures 1 to 3 As shown, an antenna according to a preferred embodiment of the present invention can at least electrically connect the feeding network and the radiating unit located on both sides of the reflector without using cables, thereby simplifying the antenna structure, reducing antenna losses, and reducing the impact of resonance on the working frequency band.

[0040] Specifically, Figure 1 As shown, the antenna includes a reflector 10, a radiation unit 20 and a first feeding network 30. The reflector 10 has a first end face 10a and a second end face 10b arranged opposite to each other. The first end face 10a can be used for reflecting electromagnetic waves, and the second end face 10b can be used for installing other components required for the antenna, such as a phase shifter, etc. In specific implementation, other components can be directly or indirectly installed on the second end face 10b of the reflector 10, which can be selected according to actual needs. The radiation unit 20 is located on the first end face 10a side of the reflector 10 and can be used to receive or radiate electromagnetic waves. The first feeding network 30 is located on the second end face 10b side of the reflector 10 and is electrically connected to the radiation unit 20, that is, the reflector 10 is between the first feeding network 30 and the radiation unit 20, and the first feeding network 30 can be used to feed signals to the radiation unit 20, or send the received signals to the processing unit of the base station.

[0041] like Figure 2As shown, the reflector 10 is provided with windows 11, and the number of windows 11 can be set according to the number of radiation units 20. The first feed network 30 can be directly electrically connected to the radiation unit 20 through the window 11. Since the first feed network 30 and the radiation unit 20 are directly electrically connected, the use of cables can be omitted, and the problems caused by the use of cables for connection can be avoided, such as high antenna loss and complex antenna structure. That is to say, by providing the window 11 on the reflector 10, the first feed network 30 and the radiation unit 20 are directly electrically connected, which can simplify the antenna structure and reduce the antenna loss.

[0042] Combination Figure 2 and Figure 3 As shown, in order to facilitate the first feeding network 30 to be directly electrically connected to the radiating unit 20 through the window 11, the first feeding network 30 is provided with an electrical connection portion 31 protruding into the window 11, and the first feeding network 30 can be directly electrically connected to the radiating unit 20 through the electrical connection portion 31. That is, by providing the electrical connection portion 31 protruding toward the window 11 on the first feeding network 30, the first feeding network 30 can be directly electrically connected to the radiating unit 20, eliminating the use of cables, thereby simplifying the antenna structure and reducing antenna losses.

[0043] like Figure 3 As shown, the first feeding network 30 includes a cavity 30a and a signal processing circuit 30b disposed in the cavity 30a. The first feeding network 30 here includes but is not limited to a phase shifter, a combiner, and a power divider, wherein the power divider is a one-to-N power divider, and N is an integer greater than or equal to 1. For example, when the first feeding network 30 is a phase shifter, the phase shifter includes a cavity 30a and a phase shifting circuit disposed in the cavity 30a; when the first feeding network 30 is a power divider, the power divider includes a cavity 30a and a power dividing circuit disposed in the cavity 30a; when the first feeding network 30 is a combiner, the combiner includes a cavity 30a and a combining circuit disposed in the cavity 30a. The signal processing circuit 30b here includes but is not limited to being formed by a stripline, a microstrip line structure, etc.

[0044] The cavity 30a has an end face facing the reflector 10, and the end face is provided with a protrusion 31a protruding toward the reflector 10, and the protrusion 31a is further provided with a feed conductor 31b connected to the signal processing circuit 30b. The protrusion 31a and the feed conductor 31b form the electrical connection part 31, that is, the electrical connection part 31 includes the protrusion 31a provided on the cavity 30a and the feed conductor 31b provided on the protrusion 31a. By adopting the electrical connection part 31 of this structure to connect the radiation unit 20 with the first feed network 30, the loss of the antenna can be effectively reduced and the gain of the antenna can be improved. This is because the protrusion 31a and the feed conductor 31b in the electrical connection part 31 constitute an air strip line structure, and the radiation unit 20 is connected to the first feed network 30 through the air strip line, which can reduce the loss of the antenna and improve the gain of the antenna.

[0045] In this embodiment, the electrical connection 31 is an air strip line structure. Of course, in other embodiments, it can also be a microstrip line structure, which can be set according to actual needs. The feed conductor 31b is preferably a PIN pin, which can achieve stable signal connection. The raised portion 31a is preferably integrally formed with the cavity 30a, which can at least reduce the installation of parts. Since the raised portion 31a and the cavity 30a are integrally formed, the ground can be continuously distributed on the raised portion 31a and the cavity 30a, which can effectively avoid the disadvantage of discontinuous ground distribution due to welding.

[0046] Furthermore, a first insulating medium 40 is provided between the cavity 30a and the reflector 10, so that the cavity 30a and the reflector are coupled to each other. Through the coupling connection, the work of installing screws and welding can be avoided, which facilitates installation and reduces PIM risks.

[0047] Combination Figure 1 and Figure 2 As shown, the radiation unit 20 includes at least one radiation oscillator 21 and a second feeding network 22. Of course, in other embodiments, the radiation unit 20 may also include only the radiation oscillator 21, which can be configured according to actual needs. The following two embodiments are used to describe in detail how the first feeding network 30 is electrically connected to the radiation unit 20.

[0048] Embodiment 1

[0049] When the radiation unit 20 includes a radiation oscillator 21 and a second feed network 22, the second feed network 22 is electrically connected to the radiation oscillator 21. At the same time, the second feed network 22 is also electrically connected to the first feed network 30 directly through the window 11, that is, the second feed network 22 is electrically connected to the electrical connection portion 31 located in the window 11 to achieve electrical connection between the second feed network 22 and the first feed network 30. The second feed network 22 can feed the signal transmitted by the first feed network 30 to the radiation oscillator 21, or transmit the received signal to the first feed network 30, so as to further transmit it to the processing unit of the base station through the first feed network 30. The number of radiation oscillators 21 can be set according to actual needs, such as Figure 1 As shown, a second feeding network 22 connects two radiating elements 21 .

[0050] Combination Figure 2 to Figure 4 As shown, the radiating oscillator 21 includes an oscillator 21a and a feeding balun 21b arranged on the oscillator 21a. The second feeding network 22 includes a conductive part 22a and a grounding part 22b. In a specific implementation, the conductive part 22a is electrically connected to the feeding conductor 31b of the electrical connection part 31, and the grounding part 22b is electrically connected to the protrusion 31a of the electrical connection part 31. When the grounding part 22b is electrically connected to the protrusion 31a, a direct connection or a coupling connection can be adopted. In implementation, a coupling connection is preferred. This is because when the grounding part 22b is in direct contact with the protrusion 31a, the two are in surface contact, and it is usually impossible to ensure that each part is tightly fitted, and there is a certain PIM (Passive InterModulation) risk. When a coupling connection is adopted, the PIM risk caused by the above-mentioned inability to fit tightly can be avoided. In a specific implementation, the electrical connection method of the two can be selected according to actual needs. For example, when the PIM requirement is not high, a direct connection can be adopted, and when the PIM requirement is high, a coupling connection method can be adopted. By connecting by coupling, the risk of PIM can be reduced, and the installation of screws and welding work can also be reduced, making the antenna installation easier. Secondly, because the cavity 30a extends into the window 11 through the protrusion 31a, the ground around the feed conductor 31b is in a continuous distribution state. Compared with the feed conductor 31b passing through the gap between the cavity 30a and the reflector 10 and the gap between the reflector 10 and the grounding portion 22b in sequence, the present invention uses the protrusion 31a to make the ground around the feed conductor 31b continuously distributed to the grounding portion 22b, thereby effectively avoiding the resonance interference problem caused by the feed conductor 31b passing through the gap between the cavity 30a and the reflector 10.

[0051] In this embodiment, the coupling area between the protrusion 31a and the grounding portion 22b is not less than 300mm 2By setting the coupling area within the above range, the signal can be stably transmitted, and the resonance interference generated when the feed conductor 31b passes through the gap between the reflector 10 and the grounding portion 22b can be effectively reduced. In a specific implementation, in the width direction of the reflector 10, the width of the protrusion 31a is not less than 15mm, and in the length direction of the reflector 10, the length of the protrusion 31a is not less than 20mm, so that the coupling area between the protrusion 31a and the grounding portion 22b is not less than 300mm. 2 In practice, it is best if the width of the protrusion 31a is not less than 20 mm and the length is not less than 40 mm.

[0052] like Figure 4 As shown, the second feeding network 22 includes but is not limited to stripline and microstrip line structures. In specific implementation, the microstrip line structure is the best choice to ensure reliable and stable signal transmission. When the second feeding network 22 is a microstrip line structure, as shown in FIG. Figure 4 As shown, it includes a conductive portion 22a, a grounding portion 22b and a dielectric substrate 22c. The conductive portion 22a is disposed on one side of the dielectric substrate, and the grounding portion 22b is disposed on the opposite side. The conductive portion 22a is electrically connected to the feed conductor 31b of the electrical connection portion 31, and the grounding portion 22b is electrically connected to the protrusion 31a of the electrical connection portion 31. When the second feeding network 22 is a stripline structure, it includes a dielectric substrate 22c, a conductive portion 22a disposed in the dielectric substrate 22c, and grounding portions 22b disposed on both sides of the dielectric substrate 22c. The conductive portion 22a is electrically connected to the feed conductor 31b of the electrical connection portion 31, and the grounding portion 22b close to the reflector 10 is electrically connected to the protrusion 31a of the electrical connection portion 31.

[0053] Furthermore, combined with Figure 2 and Figure 3 As shown, the protrusion 31a has a surface S1 facing the radiation unit 20, and the reflector 10 also has a surface S2 facing the radiation unit 20, and the surfaces of the two are arranged in the same plane, that is, the surface of the protrusion 31a facing the radiation unit 20 and the surface of the reflector 10 facing the radiation unit 20 are in the same plane, and the plane is recorded as the mounting surface. The second feeding network 22 is installed on the mounting surface, and a second insulating medium (not shown in the figure) is arranged between the mounting surface and the grounding portion 22b of the second feeding network 22, so that the protrusion 31a and the grounding portion 22b of the second feeding network 22 are coupled and connected. By arranging the surface of the protrusion 31a and the surface of the reflector 10 in the same plane, the second feeding network 22 can be arranged in the same plane everywhere, avoiding the problem of deformation of the feeding network due to uneven force, and improving the life of the feeding network. Preferably, the second insulating medium is green oil (liquid photoresist) coated on the surface of the grounding portion 22b.

[0054] Furthermore, in order to ensure the grounding stability of the radiation unit 20, the grounding portion 22b of the second feeding network 22 is at least partially coupled to the reflection plate 10. Figure 2 As shown, a part of the grounding portion 22b is electrically connected to the protrusion 31a, and a part of the grounding portion 22b is electrically connected to the reflector 10. In specific implementation, coupling connection is the best. By adopting the coupling connection method, the work of installing screws and welding can be avoided, making the installation more convenient and reducing the risk of PIM.

[0055] Combination Figure 1 to Figure 3 As shown, when the first feeding network 30 is coupled with the second feeding network 22 through the electrical connection portion 31, resonance will occur. This is because when the cavity 30a is coupled with the reflector 10, there is a gap between the cavity 30a and the reflector 10, and resonance will occur when the feeding conductor 31b passes through the cavity 30a and the reflector 10. Similarly, resonance will also occur when the reflector 10 is coupled with the ground of the radiation unit 20. In order to eliminate the resonance caused, the window 11 provided on the reflector 10 can enable the raised portion 31a to be directly coupled with the ground portion 22b of the second feeding network 22, thereby reducing the resonance. In other words, by using the window 11 provided on the reflector, the raised portion 31a is directly coupled with the ground portion 22b of the second feeding network 22. Compared with the solution in which the cavity 30a of the first feeding network 30 is coupled with the reflector 10, and the reflector 10 is then coupled with the ground portion 22b of the second feeding network 22, the resonance can be effectively reduced. Figure 6 As shown, it is a schematic diagram of the antenna frequency generated when the first feeding network 30 is indirectly coupled to the ground of the second feeding network 22, and the first feeding network 30 is directly coupled to the ground of the second feeding network 22. It can be seen from the figure that more resonances are easily generated during indirect coupling, while resonances can be reduced or eliminated during direct coupling, such as no resonance is generated from 0.6 GHz to 3 GHz.

[0056] Furthermore, the window 11 of the reflector 10 needs to meet certain requirements to further reduce the resonance. Specifically, the length direction of the reflector 10 is defined as the length direction, and the width direction of the reflector 10 is defined as the width direction. In implementation, in the width direction, the width of the window 11 is greater than the width of the second feeding network 22, or in other words, in the width direction, the projection area of ​​the second feeding network 22 is located in the window 11. At the same time, in the length direction, the length of the window 11 decreases as the antenna frequency increases, that is, when the antenna frequency is at a high frequency, the length of the window 11 is correspondingly smaller, and when the antenna frequency is at a low frequency, the length of the window 11 is correspondingly larger. By setting the window 11 to the above-mentioned structure, the resonance caused by coupling can be effectively eliminated and the antenna performance can be improved.

[0057] In this embodiment, in order to enable the window 11 to better eliminate the resonance caused by coupling, a certain relationship must be satisfied between the window 11 and the raised portion 31a to better eliminate the resonance. Specifically, in the length direction, the minimum distance between the edge of the window 11 and the edge of the raised portion 31a satisfies the requirement of decreasing as the antenna frequency increases. Figure 5 As shown in the figure, a is the edge of the window 11, b is the edge of the protrusion 31a, and L is the minimum distance between the two edges. L decreases as the antenna frequency increases. In a specific implementation, when the antenna frequency is high frequency, the minimum distance between the edge of the window 11 and the edge of the protrusion 31a is greater than or equal to 3mm; when the antenna frequency is low frequency, the minimum distance between the edge of the window 11 and the edge of the protrusion 31a is greater than or equal to 15mm. Figure 4 As shown in FIG. 1 , when the antenna frequency is high frequency, L is not less than 3 mm; when the antenna frequency is low frequency, L is not less than 15 mm. Here, high frequency refers to the antenna frequency of 1965 to 2690 MHz, and low frequency refers to the antenna frequency of 617 to 960 MHz. By satisfying the above relationship between the window 11 and the protrusion 31a, the resonance caused by coupling can be effectively reduced. Figure 7 As shown, the antenna frequency diagram is when the minimum distance between the edge of the window 11 and the edge of the protrusion 31a is 6mm, 21mm, and 31mm respectively. It can be seen from the figure that when the minimum distance gradually increases, the resonance gradually drifts to the low frequency, and some small resonances gradually disappear. Therefore, by changing the size of the window 11, the resonance caused by coupling can be effectively eliminated.

[0058] In this embodiment, when the antenna frequency is high frequency, the minimum distance between the edge of the window 11 and the edge of the protrusion 31a is not less than 6mm; when the antenna frequency is low frequency, the minimum distance between the edge of the window 11 and the edge of the protrusion 31a is not less than 30mm, which is the best and can be set according to actual needs. By setting the minimum distance within the above range, the resonance caused by coupling in the corresponding frequency band can be effectively reduced, thereby improving the antenna performance.

[0059] Embodiment 2

[0060] like Figure 8As shown, when the radiation unit 20 only includes the radiation oscillator 21, the radiation oscillator 21 is directly electrically connected to the first feeding network 30 through the window 11, that is, the radiation oscillator 21 is electrically connected to the electrical connection portion 31 located in the window 11, so as to realize the electrical connection between the radiation oscillator 21 and the first feeding network 30. The first feeding network 30 can transmit a signal to the radiation oscillator 21, or the radiation oscillator 21 transmits the received signal to the first feeding network 30, so as to further transmit it to the processing unit of the base station through the first feeding network 30. By making the first feeding network 30 electrically connected to the radiation oscillator 21 directly through the electrical connection portion 31, the use of cables can be omitted, thereby avoiding the problems caused by using cables for connection, such as high antenna loss and complex antenna structure. The structure of the first feeding network 30 here is the same as that of the first embodiment, and will not be repeated here one by one. When the first feeding network 30 is connected to the radiating element 21 , the feeding conductor 31 b connects the signal processing circuit and the radiating element, and the protrusion 31 a is electrically connected to the ground of the radiating element 21 .

[0061] Furthermore, when the radiation oscillator 21 is coupled to the second feeding network 22, in order to eliminate the resonance caused by the coupling, the window 11 of the reflector 10 needs to meet certain requirements. See the first embodiment for details, which will not be described in detail here.

[0062] The present invention provides a window on the reflector and an electrical connection portion protruding into the window on the cavity of the first feed network, so that the first feed network can be directly electrically connected to the radiation unit, and the feed network and the radiation unit on both sides of the reflector can be electrically connected without using cables, thereby simplifying the antenna structure and reducing antenna loss. In addition, the protrusion in the electrical connection portion and the feed conductor form an air strip line structure, and the first feed network is directly electrically connected to the radiation oscillator or the second feed network through the electrical connection portion through the air strip line, which can also reduce the loss of the antenna and improve the gain of the antenna.

[0063] At the same time, the present invention can effectively reduce resonance by providing a window on the reflector so that the raised portion in the electrical connection portion is directly coupled and connected to the ground of the second feeding network or the radiating oscillator. And the edge of the window and the edge of the raised portion meet a predetermined condition, which can further reduce resonance.

[0064] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. An antenna, characterized in that: The invention comprises a first feeding network, a reflecting plate and a radiating unit, wherein the reflecting plate is arranged between the first feeding network and the radiating unit, the reflecting plate is provided with a window, the first feeding network is provided with an electrical connecting portion protruding into the window, the first feeding network is directly electrically connected to the radiating unit through the electrical connecting portion, the first feeding network comprises a cavity and a signal processing circuit arranged in the cavity, the electrical connecting portion comprises a protruding portion arranged in the cavity and a feeding conductor arranged in the protruding portion, and the protruding portion is integrally formed with the cavity.

2. The antenna according to claim 1, characterized in that The radiation unit includes a radiation oscillator and a second feeding network which are electrically connected, and the first feeding network is directly electrically connected to the second feeding network through the electrical connection portion.

3. The antenna according to claim 2, characterized in that The second feeding network includes a conductive portion and a grounding portion, the feeding conductor connects the signal processing circuit and the conductive portion, and the protruding portion is electrically connected to the grounding portion.

4. The antenna according to claim 3, characterized in that The surface of the protrusion facing the radiation unit and the surface of the reflection plate facing the radiation unit are in the same plane to form a mounting surface, and the second feeding network is arranged on the mounting surface.

5. The antenna according to claim 3, characterized in that A first insulating medium is provided between the cavity and the reflector.

6. The antenna according to claim 4, characterized in that A second insulating medium is provided between the mounting surface and the grounding portion.

7. The antenna according to claim 6, characterized in that The second insulating medium is liquid photoresist.

8. The antenna according to claim 3, characterized in that The protrusion is coupled to the grounding portion, and the coupling area is not less than 300 mm 2 .

9. The antenna according to claim 8, characterized in that In the width direction of the reflecting plate, the width of the protrusion is not less than 15 mm, and in the length direction of the reflecting plate, the length of the protrusion is not less than 20 mm.

10. The antenna according to claim 9, characterized in that The width of the protrusion is not less than 20 mm, and the length of the protrusion is not less than 40 mm.

11. The antenna according to claim 3, characterized in that The grounding portion is at least partially coupled to the reflection plate.

12. The antenna according to claim 3, characterized in that In the width direction of the reflecting plate, the minimum distance between the edge of the window and the edge of the protruding portion is not less than 1 mm.

13. The antenna according to claim 12, characterized in that When the frequency of the antenna is 1965-2690 MHz, in the length direction of the reflector, the minimum distance between the edge of the window and the edge of the protrusion is not less than 3 mm.

14. The antenna according to claim 13, characterized in that: In the length direction of the reflector, the minimum distance between the edge of the window and the edge of the boss portion is not less than 6 mm.

15. The antenna according to claim 12, characterized in that When the frequency of the antenna is 617-960 MHz, in the length direction of the reflector, the minimum distance between the edge of the window and the edge of the protruding portion is not less than 15 mm.

16. The antenna according to claim 15, characterized in that In the length direction of the reflective plate, the minimum distance between the edge of the window and the edge of the protruding portion is not less than 30 mm.

17. The antenna according to claim 1, wherein: The radiation unit includes a radiation element, and the first feeding network is directly electrically connected to the radiation element through the electrical connection portion.

18. The antenna according to claim 17, characterized in that The first feeding network includes a cavity and a signal processing circuit arranged in the cavity, the electrical connection portion includes a protrusion arranged in the cavity and a feeding conductor arranged in the protrusion, the feeding conductor connects the signal processing circuit and the radiating oscillator, and the protrusion is electrically connected to the ground of the radiating oscillator.

19. The antenna according to any one of claims 1 to 18, characterized in that: The first feeding network is selected from one of a power divider, a phase shifter, and a combiner.

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