A base station antenna with high co-frequency isolation ability

Abstract

This application relates to the field of communication technologies, and particularly to a base station antenna with high cross-frequency isolation ability. The base station antenna with high cross-frequency isolation ability includes a dielectric component, a metal layer, a first patch, two feeding networks, and four first feeding components. The dielectric component includes a first dielectric substrate, a second dielectric substrate, and a third dielectric substrate arranged in sequence. The two feeding networks are used to commonly feed a pair of differential signals; each feeding network has two feeding branches, and each feeding branch is used to commonly convert a pair of differential signals into two pairs of differential signals. The first feeding component includes a first disk and a first connecting member. The first connecting member sequentially passes through the first dielectric substrate, the metal layer, and the second dielectric substrate to correspondingly connect the feeding branch to the first disk, so as to feed each differential signal into the first disk. The base station antenna with high cross-frequency isolation ability provided by this application improves the cross-frequency isolation ability of the base station antenna.

Description

Technical Field

[0001] The present application relates to the field of communication technologies, and particularly to a base station antenna with high cross-frequency isolation ability. Background Art

[0002] The base station antenna of the present application is a key component for transmitting and receiving radio signals in a wireless communication system, and can transmit wireless signals between a base station and a mobile device. Different mobile communication technologies use different frequency bands, and by covering multiple frequency bands, backward compatibility of the network can be achieved. To achieve multi-frequency coverage, multiple base station antennas with different frequency bands are generally installed in the same base station.

[0003] In the prior art, a base station antenna includes a feeding network and a radiation unit. The radio frequency device of the base station generates a radio frequency signal, which is transmitted to the radiation unit through the feeding network. The radiation unit then converts the radio frequency signal into an electromagnetic wave and propagates it through the air to a mobile terminal.

[0004] However, multiple base station antennas will generate unnecessary harmonics during operation, thereby interfering with the signals of adjacent antenna channels. Summary of the Invention

[0005] The present application provides a base station antenna with high cross-frequency isolation ability, which improves the cross-frequency isolation ability of the base station antenna.

[0006] The base station antenna with high cross-frequency isolation ability provided by the present application includes: a dielectric component, a metal layer, a first patch, two feeding networks, and four first feeding components. The dielectric component includes a first dielectric substrate, a second dielectric substrate, and a third dielectric substrate arranged in sequence.

[0007] The metal layer is disposed between the first dielectric substrate and the second dielectric substrate; the first patch is disposed on a side of the third dielectric substrate facing away from the second dielectric substrate.

[0008] The two feeding networks are both disposed on a side of the first dielectric substrate facing away from the metal layer. The two feeding networks are used to commonly feed a pair of differential signals; each feeding network has two feeding branches, and each feeding branch is used to commonly convert a pair of differential signals into two pairs of differential signals.

[0009] The first feeding component includes a first disk and a first connecting member. The first disk is disposed between the second dielectric substrate and the third dielectric substrate. The first disk is coupled to the first patch through the third dielectric substrate. The first connecting member sequentially passes through the first dielectric substrate, the metal layer, and the second dielectric substrate to correspondingly connect the feeding branch to the first disk, so as to feed each differential signal into the first disk.

[0010] In a possible implementation, for the base station antenna with high cross-frequency isolation capability provided by the present application, each feeding branch is symmetrically arranged along the center of the first dielectric substrate.

[0011] In a possible implementation, for the base station antenna with high cross-frequency isolation capability provided by the present application, it further includes a second patch and four second feeding components. The dielectric component further includes a fourth dielectric substrate, and the fourth dielectric substrate is arranged on the side of the first patch facing away from the third dielectric substrate.

[0012] The second patch is arranged on the side of the fourth dielectric substrate facing away from the first patch, and each second feeding component connects the first patch and the second patch through the fourth dielectric substrate.

[0013] In a possible implementation, for the base station antenna with high cross-frequency isolation capability provided by the present application, the second feeding components are arranged in one-to-one correspondence with the first connecting parts.

[0014] In a possible implementation, for the base station antenna with high cross-frequency isolation capability provided by the present application, the second feeding component includes at least one second disk and at least one second connecting part. Both the second disk and the second connecting part are arranged in the fourth dielectric substrate, the second connecting part is inserted on the second disk, and the first patch and the second patch are coupled through the second connecting part.

[0015] In a possible implementation, for the base station antenna with high cross-frequency isolation capability provided by the present application, a plurality of open-circuit small loops are formed on the second patch, and the second connecting part is coupled with the second patch through the open-circuit small loops.

[0016] In a possible implementation, for the base station antenna with high cross-frequency isolation capability provided by the present application, both the first patch and the second patch are annular.

[0017] In a possible implementation, for the base station antenna with high cross-frequency isolation capability provided by the present application, the first patch and the second patch are coaxially arranged.

[0018] In a possible implementation, for the base station antenna with high cross-frequency isolation capability provided by the present application, the corresponding edges of the first patch and the second patch are flush.

[0019] In a possible implementation, for the base station antenna with high cross-frequency isolation capability provided by the present application, the metal layer is a copper plate or an aluminum plate.

[0020] The base station antenna with high co-frequency isolation ability provided by this application includes a dielectric component, a metal layer, a first patch, two feeding networks, and four first feeding components through setting. The dielectric component includes a first dielectric substrate, a second dielectric substrate, and a third dielectric substrate arranged in sequence. The metal layer is arranged between the first dielectric substrate and the second dielectric substrate; the first patch is arranged on the side of the third dielectric substrate facing away from the second dielectric substrate. The two feeding networks are both arranged on the first dielectric substrate, and the two feeding networks are used to jointly feed a pair of differential signals; two feeding branches are arranged on the feeding network to convert a pair of differential signals into two pairs of differential signals. The first feeding component includes a first disc and a first connecting piece, and the first disc is arranged between the second dielectric substrate and the third dielectric substrate. The first connecting piece correspondingly connects the feeding branch and the first disc to feed each differential signal into the first disc, and each first disc is coupled with the first patch, so as to realize multi-point feeding, and can realize the basic operating mode TM 11 required for exciting the base station antenna, while effectively suppressing the harmonic mode, thereby improving the co-frequency isolation ability of the base station antenna. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0022] Figure 1 It is a schematic structural diagram of the base station antenna with high co-frequency isolation ability provided by the embodiment of this application;

[0023] Figure 2 It is Figure 1 a schematic structural diagram from another angle;

[0024] Figure 3 It is Figure 1 the internal structural schematic diagram;

[0025] Figure 4 It is a schematic diagram of the scattering parameters and actual gain of the base station antenna with high co-frequency isolation ability provided by the embodiment of this application;

[0026] Figure 5 It is the radiation pattern of the base station antenna with high co-frequency isolation ability provided by the embodiment of this application at 2.24 GHz;

[0027] Figure 6 It is the radiation pattern of the base station antenna with high co-frequency isolation ability provided by the embodiment of this application at 2.32 GHz.

[0028] Description of the Reference Numerals:

[0029] 100 - dielectric component; 110 - first dielectric substrate; 120 - second dielectric substrate; 130 - third dielectric substrate; 140 - fourth dielectric substrate;

[0030] 200 - metal layer;

[0031] 300 - first patch;

[0032] 400 - feeding network; 410 - feeding branch;

[0033] 500 - first feeding component; 510 - first disk; 520 - first connector;

[0034] 600 - second patch; 610 - open - circuit loop;

[0035] 700 - second feeding component; 710 - second disk; 720 - second connector.

[0036] Through the above - mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed embodiments

[0037] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application. Those skilled in the art can adjust them as needed to adapt to specific application scenarios.

[0038] Secondly, it should be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, or the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present application can be understood according to specific situations.

[0039] Then, it should also be noted that in the description of the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0040] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "a plurality of" means two or more.

[0041] As shown in the background art, in the prior art, a base station antenna includes a feeding network and a radiation unit. The radio frequency device of the base station generates radio frequency signals, which are transmitted to the radiation unit through the feeding network. The radiation unit then converts the radio frequency signals into electromagnetic waves and propagates them through the air to the mobile terminal.

[0042] However, multiple base station antennas will generate unnecessary harmonics during operation, thus interfering with the signals in adjacent antenna channels.

[0043] Based on this, the base station antenna with high cross-frequency isolation ability provided by this application, by setting a dielectric component, a metal layer, a first patch, two feeding networks and four first feeding components, the dielectric component includes a first dielectric substrate, a second dielectric substrate and a third dielectric substrate arranged in sequence. The metal layer is arranged between the first dielectric substrate and the second dielectric substrate; the first patch is arranged on the side of the third dielectric substrate facing away from the second dielectric substrate. Both of the two feeding networks are arranged on the first dielectric substrate, and the two feeding networks are used to jointly feed a pair of differential signals; two feeding branches are provided on the feeding network to convert a pair of differential signals into two pairs of differential signals. The first feeding component includes a first disk and a first connecting piece, and the first disk is arranged between the second dielectric substrate and the third dielectric substrate. The first connecting piece correspondingly connects the feeding branch and the first disk to feed each differential signal into the first disk, and each first disk is coupled with the first patch, so as to realize multi-point feeding, and can realize the effective suppression of harmonic modes while exciting the basic operating mode TM 11 of the base station antenna, thereby improving the cross-frequency isolation ability of the base station antenna.

[0044] It should be noted that a pair of differential signals refers to a signal transmission method used in circuit design and communication systems. A pair of differential signals consists of two wires. One wire transmits the positive polarity of the signal (usually called the positive signal or non-inverted signal), while the other wire transmits the negative polarity of the signal (usually called the negative signal or inverted signal), and the voltage difference between these two signal lines is the actually transmitted signal.

[0045] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar components or components with the same or similar functions from beginning to end. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, but should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0046] The base station antenna with high cross-frequency isolation ability provided by the present application, as shown in Figures 1 to 3 Figure [not provided], includes: a dielectric component 100, a metal layer 200, a first patch 300, two feeding networks 400, and four first feeding components 500. The dielectric component 100 includes a first dielectric substrate 110, a second dielectric substrate 120, and a third dielectric substrate 130 arranged in sequence.

[0047] The metal layer 200 is disposed between the first dielectric substrate 110 and the second dielectric substrate 120; the first patch 300 is disposed on the side of the third dielectric substrate 130 facing away from the second dielectric substrate 120.

[0048] The two feeding networks 400 are both disposed on the side of the first dielectric substrate 110 facing away from the metal layer 200. The two feeding networks 400 are used to jointly feed a pair of differential signals; each feeding network 400 has two feeding branches 410, and each feeding branch 410 is used to jointly convert a pair of differential signals into two pairs of differential signals.

[0049] The first feeding component 500 includes a first disk 510 and a first connecting member 520. The first disk 510 is disposed between the second dielectric substrate 120 and the third dielectric substrate 130, and the first disk 510 is coupled to the first patch 300 through the third dielectric substrate 130; the first connecting member 520 sequentially passes through the first dielectric substrate 110, the metal layer 200, and the second dielectric substrate 120 to correspondingly connect the feeding branch 410 to the first disk 510, so as to feed each differential signal into the first disk 510.

[0050] It should be noted that the feeding network 400 of the base station antenna is fed by a pair of differential signals. By arranging two feeding branches 410 on the feeding network 400, after impedance matching transformation through a power splitting structure, a pair of differential signals can be divided into two pairs of differential signals. Due to the symmetry of the feeding network 400, the two signals located on the same feeding network 400 (i.e., on the same side of the first dielectric substrate 110) are equal-amplitude and in-phase signals, and the two signals located on different feeding networks 400 (i.e., on different sides of the first dielectric substrate 110) are equal-amplitude and out-of-phase signals.

[0051] Next, by arranging four first feeding components 500, the first feeding component 500 includes a first disk 510 and a first connecting member 520. Each first connecting member 520 feeds the differential signals on the feeding branch 410 into the first disk 510 correspondingly through the metal layer 200. Each first disk 510 is coupled to the first patch 300, that is, four feeding points are arranged on the first patch 300, which can realize multi-point feeding and can excite the basic operating mode TM 11 (a specific electromagnetic wave mode), and at the same time, without introducing any additional components, effectively suppress the harmonic mode, thereby improving the co-frequency isolation ability of the base station antenna.

[0052] It should also be noted that by arranging the metal layer 200 between the first dielectric substrate 110 and the second dielectric substrate 120, the metal layer 200 can be used as a shielding layer to reduce the coupling and interference between different frequency signals. It can not only block the interference of external electromagnetic fields on internal signals, but also prevent internal signals from radiating outwards, thereby improving the signal integrity and stability of the antenna. The metal layer 200 can also act as a reflecting surface to help guide and enhance the signal radiation in a specific direction, improving the gain and directivity of the antenna.

[0053] In specific implementation, the first connecting member 520 passes through the metal layer 200 to connect the feeding branch 410 and the first disk 510. Annular openings can be provided on the metal layer 200 and the feeding branch 410 so that the first connecting member 520 does not make direct contact with them. Exemplarily, the first connecting member 520 can be a pin.

[0054] The feeding network 400, the first dielectric substrate 110, the metal layer 200, the second dielectric substrate 120, the first disk 510, the third dielectric substrate 130 and the first patch 300 can all adopt an adhesive connection method. On the one hand, it can reduce the impedance discontinuity at the connection, improving the radiation efficiency and gain of the antenna. On the other hand, the adhesion is relatively firm and it is not easy to loosen or fall off.

[0055] The materials of the first dielectric substrate 110, the second dielectric substrate 120, and the third dielectric substrate 130 can be flame-retardant copper-clad laminates. The flame-retardant copper-clad laminates have good mechanical strength, can withstand large external forces, and are not easily deformed. The flame-retardant copper-clad laminates also have good flame retardancy and high safety. Moreover, the dielectric constant and loss factor of the flame-retardant copper-clad laminates are relatively stable, so that the attenuation and distortion of signals during transmission can be reduced, and the transmission quality of signals can be improved.

[0056] It can be understood that, compared with the prior art, multiple base station antennas will generate unnecessary harmonics during operation. The base station antenna provided in this application with high cross-frequency isolation ability, by setting the dielectric component 100, the metal layer 200, the first patch 300, two feeding networks 400, and four first feeding components 500, the dielectric component 100 includes the first dielectric substrate 110, the second dielectric substrate 120, and the third dielectric substrate 130 arranged in sequence. The metal layer 200 is arranged between the first dielectric substrate 110 and the second dielectric substrate 120; the first patch 300 is arranged on the side of the third dielectric substrate 130 facing away from the second dielectric substrate 120. Both of the two feeding networks 400 are arranged on the first dielectric substrate 110, and the two feeding networks 400 are used to jointly feed a pair of differential signals; two feeding branches 410 are provided on the feeding network 400 to convert a pair of differential signals into two pairs of differential signals. The first feeding component 500 includes a first disc 510 and a first connecting member 520, and the first disc 510 is arranged between the second dielectric substrate 120 and the third dielectric substrate 130. The first connecting member 520 correspondingly connects the feeding branch 410 with the first disc 510 to feed each differential signal into the first disc 510, and each first disc 510 is coupled with the first patch 300, so as to realize multi-point feeding, and can realize the basic operating mode TM required for exciting the base station antenna 11 while effectively suppressing the harmonic mode, thereby improving the cross-frequency isolation ability of the base station antenna.

[0057] In some embodiments, as shown in Figure 2 each feeding branch 410 is symmetrically arranged along the center of the first dielectric substrate 110.

[0058] It should be noted that the symmetric feeding structure helps to achieve good impedance matching, reduce reflection loss, improve the bandwidth and gain of the base station antenna, and enable it to work effectively in a wider frequency range.

[0059] The centrally symmetric feeding branch 410 can also achieve balanced feeding, which helps to reduce the common-mode current of the base station antenna, thereby reducing the radiation loss and interference of the antenna, and improving the efficiency and performance of the antenna. It should also be noted that in a multi-antenna system, the symmetric feeding design can reduce the mutual coupling between antennas.

[0060] In some embodiments, referring to Figure 1 and Figure 3 as shown, the base station antenna with high cross-frequency isolation ability further includes a second patch 600 and four second feeding components 700. The dielectric component 100 further includes a fourth dielectric substrate 140, and the fourth dielectric substrate 140 is disposed on a surface of the first patch 300 facing away from the third dielectric substrate 130.

[0061] The second patch 600 is disposed on a surface of the fourth dielectric substrate 140 facing away from the first patch 300, and each second feeding component 700 connects the first patch 300 and the second patch 600 through the fourth dielectric substrate 140.

[0062] It should be noted that the structure in which the first patch 300 and the second patch 600 are stacked one above the other can improve the impedance matching characteristics of the base station antenna, reduce the reflection loss, and also reduce the influence of surface waves, thereby improving the radiation efficiency of the base station antenna and broadening the bandwidth of the base station antenna.

[0063] It should also be noted that by providing four second feeding components 700 to connect the first patch 300 and the second patch 600, the coupling strength between the first patch 300 and the second patch 600 can be enhanced. Multiple feeding points can also help to achieve good impedance matching within a wider frequency range, reduce the reflection loss, and improve the efficiency of the base station antenna.

[0064] In some embodiments, referring to Figure 3 as shown, the second feeding components 700 and the first connectors 520 are arranged in one-to-one correspondence.

[0065] It should be noted that the second feeding components 700 and the first connectors 520 are arranged in one-to-one correspondence, that is, each second feeding component 700 and the first connector 520 are located on the same vertical line, which can optimize the impedance matching, so that the base station antenna mainly excites the required fundamental operating mode TM 11 mode, while suppressing other unnecessary modes, thereby achieving better cross-frequency isolation.

[0066] In some embodiments, referring to Figure 3 as shown, the second feeding component 700 includes at least one second disk 710 and at least one second connector 720. The second disk 710 and the second connector 720 are both disposed within the fourth dielectric substrate 140, the second connector 720 is inserted on the second disk 710, and the first patch 300 and the second patch 600 are coupled through the second connector 720.

[0067] It can be understood that by setting the second disk 710 and the second connecting member 720, stable coupling can be achieved between the first patch 300 and the second patch 600, thereby improving the performance of the base station antenna. It should be noted that by adjusting the sizes and positions of the second disk 710 and the second connecting member 720, the coupling strength can be precisely controlled, thereby optimizing the frequency response and bandwidth of the base station antenna.

[0068] In specific implementation, by changing the numbers of the second disk 710 and the second connecting member 720, better impedance matching can be achieved, reflection loss can be reduced, and the efficiency of the antenna can be improved. Exemplarily, each second feeding component 700 may include one second disk 710 and one second connecting member 720; each second feeding component 700 may also include two second disks 710 and two second connecting members 720; each second feeding component 700 may also include four second disks 710 and four second connecting members 720; the second disk 710 and the second connecting member 720 may also be both more than four, and the embodiments of the present application do not limit this too much. It should be noted that the second connecting member 720 may be a pin.

[0069] In some embodiments, referring to Figure 3 as shown, a plurality of open-circuit small loops 610 are formed on the second patch 600, and the second connecting member 720 is coupled to the second patch 600 through the open-circuit small loops 610.

[0070] It should be noted that the open-circuit small loop 610 behaves as a capacitive element in the circuit. By changing the size, shape, and position of the open-circuit small loop 610, its capacitance value can be precisely adjusted.

[0071] Specifically, by connecting an open-circuit small loop 610 to the terminal of each second connecting member 720, it can be used to adjust the capacitive coupling strength between the second connecting member 720 and the second patch 600.

[0072] It should also be noted that the first connecting member 520, the first disk 510, the second connecting member 720, the second disk 710, and the open-circuit small loop 610 are arranged at the virtual electric wall of the high-order resonance mode TM 31 between the first patch 300 and the second patch 600.

[0073] In some embodiments, referring to Figure 1 and Figure 3 as shown, both the first patch 300 and the second patch 600 are annular.

[0074] It should be noted that the annular structure can provide better impedance matching characteristics, reduce reflection loss, and improve the efficiency of the base station antenna.

[0075] By changing the geometric parameters (such as the radius) of the annular first patch 300 and the second patch 600, the impedance characteristics of the base station antenna can be conveniently adjusted to achieve better matching.

[0076] In some embodiments, referring to Figure 3 as shown, the first patch 300 and the second patch 600 are coaxially arranged.

[0077] Specifically, the coaxial arrangement reduces unnecessary reflections and losses, helps to achieve a more uniform current distribution and better impedance matching, and can also effectively reduce parasitic capacitance and inductance effects, reducing unnecessary mode excitation and frequency interference.

[0078] In some embodiments, referring to Figure 3 as shown, the corresponding edges of the first patch 300 and the second patch 600 are flush.

[0079] It can be understood that the corresponding edges of the first patch 300 and the second patch 600 being flush means that the first patch 300 and the second patch 600 have the same size, which can form a stable operating frequency band and is beneficial to adjusting impedance matching.

[0080] In some embodiments, referring to Figure 1 as shown, the metal layer 200 is a copper plate or an aluminum plate.

[0081] It should be noted that the copper plate has good electrical conductivity, thermal conductivity, and high mechanical strength, and can withstand large tensile and compressive forces. The aluminum plate has a light weight, a low price, and a smooth surface, which can reduce the reflection and scattering of electromagnetic waves and improve the gain and directivity of the antenna.

[0082] In specific implementation, the first patch 300, the first disk 510, the second patch 600, the second disk 710, and the feeding network 400 can all be made of a copper plate or an aluminum plate, or other plates can also be used. The embodiments of the present application do not impose too many restrictions on this.

[0083] Referring to Figure 4 as shown, the base station antenna with high cross-frequency isolation ability provided by the embodiments of the present application has a frequency coverage range of 2.23 - 2.37 GHz under the S 11 ≤ -10 dB standard, and the relative bandwidth at the center frequency of 2.3 GHz is about 6.1%. Specifically, the base station antenna with high cross-frequency isolation ability broadens its operating bandwidth by introducing additional radiation poles, providing a wider frequency coverage range for the antenna in practical applications, thereby making it have stronger environmental adaptability and practicality. In addition, the antenna suppresses a series of modes such as TM 11 while exciting the basic operating mode TM 11 、TM 21 and TM31 High-order resonant modes form an upper stopband that extends up to 2.83 times the center operating frequency (2.3 GHz). This is further confirmed by the actual gain curve. The maximum radiation direction (θ = 0°, φ = 0°) of the antenna within the operating frequency band shows a smooth curve, and the actual gain within the band remains at 6.5 dBi.

[0084] Referring to Figure 5 and Figure 6 As shown, the base station antenna with high cross-frequency isolation ability provided by the embodiments of the present application has consistent radiation directivity within the operating frequency band, providing directional radiation in a direction perpendicular to the XY plane in the E-plane and H-plane. The cross-polarization suppression level of the base station antenna is approximately 30 dB, showing good low cross-polarization characteristics.

[0085] Those skilled in the art can understand that the base station antenna with high cross-frequency isolation ability provided by the present application is provided by setting a dielectric component 100, a metal layer 200, a first patch 300, two feeding networks 400, and four first feeding components 500. The dielectric component 100 includes a first dielectric substrate 110, a second dielectric substrate 120, and a third dielectric substrate 130 arranged in sequence. The metal layer 200 is disposed between the first dielectric substrate 110 and the second dielectric substrate 120; the first patch 300 is disposed on a surface of the third dielectric substrate 130 facing away from the second dielectric substrate 120. Both of the two feeding networks 400 are disposed on the first dielectric substrate 110, and the two feeding networks 400 are used to commonly feed a pair of differential signals; two feeding branches 410 are provided on the feeding network 400 to convert a pair of differential signals into two pairs of differential signals. The first feeding component 500 includes a first disk 510 and a first connecting member 520. The first disk 510 is disposed between the second dielectric substrate 120 and the third dielectric substrate 130. The first connecting member 520 correspondingly connects the feeding branch 410 with the first disk 510 to feed each differential signal into the first disk 510, and each first disk 510 is coupled to the first patch 300, thereby realizing multi-point feeding and being able to excite the basic operating mode TM of the base station antenna 11 while effectively suppressing harmonic modes, thereby improving the cross-frequency isolation ability of the base station antenna.

[0086] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0087] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description for distinction and do not limit the scope of the embodiments of the present application.

[0088] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present application.

Claims

1. A base station antenna with high frequency isolation capability, characterized in that: include: A dielectric component (100), the dielectric component (100) comprising a first dielectric substrate (110), a second dielectric substrate (120), and a third dielectric substrate (130) which are arranged in sequence; A metal layer (200) is provided between the first dielectric substrate (110) and the second dielectric substrate (120); A first patch (300) is arranged on a side of the third dielectric substrate (130) facing away from the second dielectric substrate (120); Two feeding networks (400) are both arranged on a side of the first dielectric substrate (110) away from the metal layer (200), and the two feeding networks (400) are used to feed a pair of differential signals together; each feeding network (400) has two feeding branches (410), and each feeding branch (410) is used to convert a pair of differential signals into two pairs of differential signals together; Four first feeding assemblies (500), wherein the first feeding assemblies (500) comprise: A first circular disk (510) is arranged between the second dielectric substrate (120) and the third dielectric substrate (130), wherein the first circular disk (510) is coupled to the first patch (300) via the third dielectric substrate (130); A first connecting member (520) connects the feeding branch (410) and the first disk (510) correspondingly via the first dielectric substrate (110), the metal layer (200) and the second dielectric substrate (120) in sequence, so as to feed each differential signal into the first disk (510); It also includes: a second patch (600) and four second feeding components (700); the dielectric component (100) further includes a fourth dielectric substrate (140), the fourth dielectric substrate (140) being arranged on a side of the first patch (300) facing away from the third dielectric substrate (130); The second patch (600) is arranged on a side of the fourth dielectric substrate (140) facing away from the first patch (300), and each second feeding component (700) connects the first patch (300) to the second patch (600) via the fourth dielectric substrate (140).

2. The base station antenna with high frequency isolation capability according to claim 1, characterized in that: The feeding branches (410) are symmetrically arranged along the center of the first dielectric substrate (110).

3. The base station antenna with high frequency isolation capability according to claim 1, characterized in that: The second feeding assembly (700) and the first connecting member (520) are arranged in a one-to-one correspondence.

4. The base station antenna with high frequency isolation capability according to claim 1, characterized in that: The second feeding component (700) comprises at least one second disk (710) and at least one second connecting member (720); the second disk (710) and the second connecting member (720) are both arranged in the fourth dielectric substrate (140); the second connecting member (720) is inserted into the second disk (710); and the first patch (300) and the second patch (600) are coupled via the second connecting member (720).

5. The base station antenna with high frequency isolation capability according to claim 4, characterized in that: The second patch (600) is provided with a plurality of open small rings (610), and the second connecting member (720) is coupled to the second patch (600) via the open small rings (610).

6. The base station antenna with high frequency isolation capability according to any one of claims 1 to 5, characterized in that: The first patch (300) and the second patch (600) are both ring-shaped.

7. The base station antenna with high frequency isolation capability according to claim 6, characterized in that: The first patch (300) and the second patch (600) are coaxially arranged.

8. The base station antenna with high frequency isolation capability according to claim 7, characterized in that: The corresponding edges of the first patch (300) and the second patch (600) are flush.

9. The base station antenna with high frequency isolation capability according to any one of claims 1 to 5, characterized in that: The metal layer (200) is a copper plate or an aluminum plate.

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