Antenna system

Abstract

The embodiment of the invention discloses an antenna system which is used for improving the isolation degree between two antenna arrays. Comprising a first antenna array and a second antenna array, and the distance between two adjacent rows of antenna oscillators of the first antenna array in the target direction is determined according to the feed phase difference and wavelength of the two adjacent rows of antenna oscillators of the first antenna array in the target direction. The distance between two adjacent rows of antenna oscillators of the second antenna array in the target direction is determined according to the phase difference and the wavelength fed by the two adjacent rows of antenna oscillators of the second antenna array in the target direction.

Description

An antenna system Technical Field

[0001] The embodiments of the present application relate to the field of communications, and in particular to an antenna system. Background Art

[0002] With the large-scale commercialization of multiple-input, multiple-output (MIMO) technology, the integrated access backhaul (IAB) node solution has been proposed. This solution is used to extend the coverage of macro base stations and fill blind spots, maximizing the capacity potential and spectrum value of MIMO. IAB nodes consist of mobile terminal (MT) antennas and distributed unit (DU) antennas. The MT antennas communicate with the macro base station, and the DU antennas communicate with user equipment (UE). Traditional IAB nodes operate in frequency division duplex (FDD) or time division duplex (TDD) mode due to the low isolation between the MT and DU antennas, resulting in wasted spectrum or time slot resources. If the IAB node is required to operate within the same frequency band, and the DU antennas can receive signals from the macro base station while transmitting to the UE, and vice versa, it is necessary to reduce interference between the two antennas.

[0003] In existing technology, two metal fences are set up to surround the MT antenna and the DU antenna respectively, and a metal strip array is placed between the two metal fences to reduce interference between the antennas. However, these metal fences are often very tall, and the metal strip array also takes up a lot of space, affecting the design of other parts of the IAB node.

[0004] Summary of the Invention

[0005] The present application provides an antenna system for improving the isolation between an MT antenna and a DU antenna.

[0006] In a first aspect, the present application provides an antenna system:

[0007] The device includes a first antenna array and a second antenna array, wherein the first antenna array is arranged on a first side, and the second antenna array is arranged on a second side. The spacing between two adjacent rows of antenna elements in the first antenna array in a target direction is determined based on the phase difference and wavelength of power fed by the two adjacent rows of antenna elements in the first antenna array in the target direction. The spacing between two adjacent rows of antenna elements in the second antenna array in the target direction is determined based on the phase difference and wavelength of power fed by the two adjacent rows of antenna elements in the second antenna array in the target direction. The target direction points from the first side to the second side, and the wavelength corresponds to the operating frequency band of the first antenna array and the second antenna array.

[0008] In the present application, by setting the spacing between two adjacent rows of antenna elements of the first antenna array and the second antenna array in the target direction in the above manner, the interference signal transmitted from the first antenna to the second antenna array can be suppressed, and the interference signal transmitted from the second antenna to the first antenna array can be suppressed, thereby eliminating the need to set up additional metal fences and metal strip arrays, and obtaining good isolation between the first antenna array and the second antenna array.

[0009] In a possible implementation, if the main beam generated by the first antenna array is not deflected relative to a direction perpendicular to the array plane, the spacing between two adjacent rows of antenna elements of the first antenna array in the target direction is half a wavelength.

[0010] In one possible implementation, if the main beam generated by the first antenna array deviates toward a first side relative to a direction perpendicular to the array plane, then the spacing between two adjacent rows of antenna elements in the first antenna array in the target direction is less than half a wavelength. Alternatively, if the main beam generated by the first antenna array deviates toward a second side relative to a direction perpendicular to the array plane, then the spacing between two adjacent rows of antenna elements in the first antenna array in the target direction is greater than half a wavelength.

[0011] In a possible implementation, if the main beam generated by the first antenna array is biased toward the first side relative to the direction of the vertical array plane, the spacing d between two adjacent rows of antenna elements of the first antenna array in the target direction is a satisfy where δ a is the phase difference between the two adjacent rows of antenna elements of the first antenna array in the target direction, and λ is the wavelength. Or, if the main beam generated by the first antenna array deflects to the second side, then d a satisfy

[0012] In a possible implementation, if the main beam generated by the second antenna array is not deflected relative to a direction perpendicular to the array plane, the spacing between two adjacent rows of antenna elements of the second antenna array in the target direction is half a wavelength.

[0013] In one possible implementation, if the main beam generated by the second antenna array deviates toward a first side relative to a direction perpendicular to the array plane, then the spacing between two adjacent rows of antenna elements in the second antenna array in the target direction is greater than half a wavelength. Alternatively, if the main beam generated by the second antenna array deviates toward a second side relative to a direction perpendicular to the array plane, then the spacing between two adjacent rows of antenna elements in the second antenna array in the target direction is less than half a wavelength.

[0014] In a possible implementation, if the main beam generated by the second antenna array is biased toward the first side relative to the direction perpendicular to the array plane, the spacing d between two adjacent rows of antenna elements of the second antenna array in the target direction is b satisfy where δ b is the phase difference between the two adjacent rows of antenna elements of the second antenna array in the target direction. Or, if the main beam generated by the second antenna array is deviated to the second side relative to the direction perpendicular to the array plane, then the spacing d between the two adjacent rows of antenna elements of the second antenna array in the target direction is b satisfy

[0015] In one possible implementation, if the first antenna array includes M rows of antenna elements in the target direction, the excitation voltage amplitude of the M rows of antenna elements first increases and then decreases in the target direction; if the second antenna array includes N rows of antenna elements in the target direction, the excitation voltage amplitude of the N rows of antenna elements first increases and then decreases in the target direction.

[0016] In a possible implementation, the ratios of the excitation voltage amplitudes of the M rows of antenna elements of the first antenna array in the target direction are: The ratios of the excitation voltage amplitudes of the N rows of antenna elements in the second antenna array in the target direction are:

[0017] In one possible implementation, if the first antenna array includes M rows of antenna elements in the target direction, the sum of the excitation voltage amplitudes of the antenna elements in the odd rows of the M rows of antenna elements is equal to the sum of the excitation voltage amplitudes of the antenna elements in the even rows of the M rows of antenna elements; if the second antenna array includes N rows of antenna elements in the target direction, the sum of the excitation voltage amplitudes of the antenna elements in the odd rows of the N rows of antenna elements is equal to the sum of the excitation voltage amplitudes of the antenna elements in the even rows of the N rows of antenna elements.

[0018] In a possible implementation, the first side is the upper side and the second side is the lower side. Alternatively, the first side is the left side and the second side is the right side.

[0019] A second aspect of the present application provides an antenna system:

[0020] The system includes a first antenna array and a second antenna array, the first antenna array and the second antenna array being disposed on a first side and a second side, respectively. The first antenna array includes a row of antenna elements in a target direction, and the spacing between two adjacent rows of antenna elements in the second antenna array in the target direction is determined based on the phase difference and wavelength of power fed by the two adjacent rows of antenna elements in the second antenna array in the target direction. The target direction points from the first side to the second side, and the wavelength corresponds to the operating frequency band of the first antenna array and the second antenna array.

[0021] In the present application, by setting the spacing between two adjacent rows of antenna elements of the second antenna array in the target direction in the above manner, the interference signals transmitted in the direction of the second antenna array and the first antenna array can be suppressed, thereby eliminating the need to set up additional metal fences and metal strip arrays, and obtaining good isolation between the first antenna array and the second antenna array.

[0022] In a possible implementation, if the main beam generated by the second antenna array is not deflected relative to a direction perpendicular to the array plane, the spacing between two adjacent rows of antenna elements of the second antenna array in the target direction is half a wavelength.

[0023] In one possible implementation, if the second antenna array is positioned on a first side and the main beam generated by the second antenna array is deflected toward the first side relative to a direction perpendicular to the array plane, then the spacing between two adjacent rows of antenna elements in the second antenna array in the target direction is less than half a wavelength. Alternatively, if the second antenna array is positioned on the first side and the main beam generated by the second antenna array is deflected toward the second side relative to a direction perpendicular to the array plane, then the spacing between two adjacent rows of antenna elements in the second antenna array in the target direction is greater than half a wavelength.

[0024] In one possible implementation, if the second antenna array is disposed on the second side and the main beam generated by the second antenna array is deflected toward the first side relative to a direction perpendicular to the array plane, then the spacing between two adjacent rows of antenna elements in the second antenna array in the target direction is greater than half a wavelength. Alternatively, if the second antenna array is disposed on the second side and the main beam generated by the second antenna array is deflected toward the second side relative to a direction perpendicular to the array plane, then the spacing between two adjacent rows of antenna elements in the second antenna array in the target direction is less than half a wavelength.

[0025] In a possible implementation, if the second antenna array is arranged on the first side, and the main beam generated by the second antenna array is deviated toward the first side relative to the direction perpendicular to the array plane, then the spacing d between two adjacent rows of antenna elements of the second antenna array in the target direction is a satisfy where δ ais the phase difference between the two adjacent rows of antenna elements of the second antenna array in the target direction, and λ is the wavelength;

[0026] or,

[0027] If the second antenna array is located on the first side and the main beam generated by the second antenna array is deflected toward the second side, then d a satisfy

[0028] In a possible implementation, if the second antenna array is arranged on the second side, and the main beam generated by the second antenna array is biased toward the first side relative to the direction perpendicular to the array plane, then the spacing d between two adjacent rows of antenna elements of the second antenna array in the target direction is b satisfy where δ b is the phase difference between the two adjacent rows of antenna elements of the second antenna array in the target direction. Alternatively, if the second antenna array is set on the second side, and the main beam generated by the second antenna array is deviated to the second side relative to the direction perpendicular to the array plane, then the spacing d between the two adjacent rows of antenna elements of the second antenna array in the target direction is b satisfy

[0029] In a possible implementation, if the second antenna array includes N rows of antenna elements in the target direction, the excitation voltage amplitudes of the N rows of antenna elements first increase and then decrease in the target direction.

[0030] In a possible implementation, if the second antenna array includes M rows of antenna elements in the target direction, then the ratios of the excitation voltage amplitudes of the M rows of antenna elements in the target direction are:

[0031] In a possible implementation, the sum of the excitation voltage amplitudes of the antenna elements in odd rows among the N rows of antenna elements in the second antenna array is equal to the sum of the excitation voltage amplitudes of the antenna elements in even rows among the N rows of antenna elements.

[0032] In a possible implementation, the first side is the upper side and the second side is the lower side. Alternatively, the first side is the left side and the second side is the right side.

[0033] In a possible implementation, the second antenna array includes at least three rows of antenna elements in the target direction.

[0034] The third aspect of the present application provides an antenna mast station:

[0035] The invention comprises a pole, a mounting member, a baffle, and an antenna module, wherein the antenna system according to the first or second aspect is provided in the antenna module. The mounting member is fixedly connected to the pole, the baffle and the antenna module are fixedly connected to the mounting member, and the baffle is arranged between the pole and the antenna module.

[0036] In the present application, by providing a baffle between the antenna module and the pole, the electromagnetic waves generated by the MT antenna and the DU antenna in the antenna system can be scattered or adjusted, thereby ensuring that the isolation between the MT antenna and the DU antenna is not affected by the pole and the mounting parts.

[0037] In a possible implementation, the baffle is in the shape of a rectangle or a curved surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a schematic diagram of the structure of an IAB node in this application;

[0039] FIG2 is a schematic diagram of an application scenario in this application;

[0040] FIG3 is another schematic diagram of an application scenario in this application;

[0041] FIG4 is a schematic diagram of an antenna system in the prior art;

[0042] FIG5 is a schematic diagram of an antenna system in this application;

[0043] FIG6 is another schematic diagram of the antenna system in this application;

[0044] FIG7 is a schematic diagram showing a principle of achieving a higher isolation degree in the present application;

[0045] FIG8 is a schematic diagram showing the difference in isolation between the antenna system of the present application and the antenna system of the prior art;

[0046] FIG9 a is a gain diagram of the antenna system in this application;

[0047] FIG9 b is another gain diagram of the antenna system in this application;

[0048] FIG9 c shows the isolation corresponding to different ratios of excitation voltage amplitudes in this application;

[0049] FIG10 is another schematic diagram of the antenna system in this application;

[0050] FIG11 is another schematic diagram showing the principle of achieving higher isolation in the present application;

[0051] FIG12 is another schematic diagram showing the difference in isolation between the antenna system of the present application and the antenna system of the prior art;

[0052] FIG13a is a gain diagram of the antenna system in this application;

[0053] FIG13 b is another gain diagram of the antenna system in this application;

[0054] FIG14 is another schematic diagram of the antenna system in this application;

[0055] FIG15 is another schematic diagram showing the principle of achieving higher isolation in the present application;

[0056] FIG16 is another schematic diagram showing the difference in isolation between the antenna system of the present application and the antenna system of the prior art;

[0057] FIG17a is a gain diagram of the antenna system in this application;

[0058] FIG17 b is another gain diagram of the antenna system in this application;

[0059] FIG18 is another schematic diagram of the antenna system in this application;

[0060] FIG19 is another schematic diagram showing the principle of achieving higher isolation in the present application;

[0061] FIG20 is another schematic diagram showing the difference in isolation between the antenna system of the present application and the antenna system of the prior art;

[0062] FIG21 a is a gain diagram of the antenna system in this application;

[0063] FIG21 b is another gain diagram of the antenna system in this application;

[0064] FIG22 is a schematic structural diagram of an antenna mast station in this application;

[0065] FIG23 is another structural diagram of the antenna pole station in this application. DETAILED DESCRIPTION

[0066] The following describes the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present application, rather than all the embodiments. Those skilled in the art will appreciate that with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0067] The terms "first," "second," and the like in the specification and claims of this application and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatus.

[0068] As shown in Figure 1, the antennas of an IAB node consist of two parts: the MU antenna and the DU antenna. These two antennas perform different functions, thereby extending the coverage of the macro base station and filling blind spots, maximizing the capacity potential and spectrum value of MIMO. As shown in Figure 2, a typical application scenario of an IAB node includes a backhaul link and an access link. The DU antenna of the IAB node provides wireless access services to UEs via the access link. The MT antenna of the IAB node connects to the macro base station via the backhaul link and transmits service data from the UE to the macro base station. It should be noted that Figure 2 is only a simple illustration of an application scenario. The application scenario of an IAB node can also include multiple IAB nodes and multiple UEs. For example, as shown in Figure 3, this application scenario includes IAB node 1, IAB node 2, and a macro base station. The macro base station can access the core network. The MT antenna of IAB node 1 connects to the macro base station via an upper-level backhaul link, and the MT antenna of IAB node 2 connects to IAB node 1 via a lower-level backhaul link. In addition, the DU antennas of IAB node 1, IAB node 2, and the macro base station provide access services to UEs via the access link.

[0069] In current technology, due to the low isolation between the MT antenna and the DU antenna, the IAB node often operates in frequency division duplex mode or time division duplex mode, making it impossible to simultaneously transmit and receive signals within the same frequency band. In other words, it is impossible for the DU antenna to receive signals from the macro base station while the MT antenna is sending signals to the UE, and vice versa. In order to improve the isolation between the MT antenna and the DU antenna, please refer to Figure 4. In the existing technology, a metal fence is used to surround the MT antenna and the DU antenna, and the metal fence reflects electromagnetic waves to reduce interference between the two antennas. In addition, a metal strip array is set between the MT antenna and the DU antenna to further improve the isolation between the two antennas by suppressing surface waves. However, the above-mentioned metal fence and metal strip array will take up a lot of space, affecting the design of other parts of the IAB node.

[0070] An embodiment of the present application provides an antenna system for improving the isolation between an MT antenna and a DU antenna.

[0071] The antenna array in the embodiment of the present application can be used as an IAB node and applied in the application scenario shown in Figure 2 or Figure 3.

[0072] Please refer to Figure 5. The antenna system in the embodiment of the present application includes a first antenna array and a second antenna array, wherein the first antenna array is arranged on the first side and the second antenna array is arranged on the second side. The above-mentioned first antenna array and second antenna array are used as MT antennas and DU antennas respectively, for example, the first antenna array is used as an MT antenna, or the first antenna array is used as a DU antenna. In one case, the first side is, for example, the upper side, and the second side is, for example, the lower side; or in another case, the first side is the left side, and the second side is the right side. Of course, the first side and the second side are not limited to the above cases. In one case, the first antenna array and the second antenna array can be used to simultaneously transmit and receive signals in the same frequency band, that is, to achieve that in the same frequency band, when the DU antenna sends a signal to the UE, the MT antenna can also receive a signal from the macro base station, and when the DU antenna receives a signal from the UE, the MT antenna can also send a signal to the macro base station.

[0073] The spacing between two adjacent rows of antenna elements in the first antenna array in the target direction is determined based on the phase difference and wavelength of the power fed to the two adjacent rows of antenna elements. Similarly, the spacing between two adjacent rows of antenna elements in the second antenna array in the target direction is determined based on the phase difference and wavelength of the power fed to the two adjacent rows of antenna elements. The target direction is the direction from the first side to the second side. The first antenna array and the second antenna array use the same operating frequency band. The wavelength is the wavelength corresponding to the operating frequency band, for example, the wavelength corresponding to the center frequency, the wavelength corresponding to the high frequency, or the wavelength corresponding to the low frequency in the operating frequency band. In a preferred embodiment, the wavelength may be the wavelength corresponding to the center frequency in the operating frequency band.

[0074] In a specific implementation, if the main beam generated by the first antenna array is biased toward the first side relative to the direction of the vertical array plane, the spacing d between two adjacent rows of antenna elements of the first antenna array in the target direction is a1 Satisfies the following formula (1):

[0075]

[0076] δ a1 is the phase difference between the two adjacent rows of antenna elements, and λ is the wavelength.

[0077] If the main beam generated by the first antenna array deviates to the second side relative to the direction of the vertical array plane, the spacing d between two adjacent rows of antenna elements of the first antenna array in the target direction is a2 Satisfies the following formula (2):

[0078]

[0079] δ a2 is the phase difference between the two adjacent rows of antenna elements fed.

[0080] If the main beam generated by the second antenna array is deviated to the first side relative to the direction of the vertical array plane, the spacing d between two adjacent rows of antenna elements of the second antenna array in the target direction is b1 Satisfies the following formula (3):

[0081]

[0082] δ b1 is the phase difference between the two adjacent rows of antenna elements fed.

[0083] Alternatively, if the main beam generated by the second antenna array is deflected to the second side relative to the direction perpendicular to the array plane, the spacing d between two adjacent rows of antenna elements of the second antenna array in the target direction is b2 Satisfies the following formula (4):

[0084]

[0085] δ b2 is the phase difference between the two adjacent rows of antenna elements fed.

[0086] If there is an antenna array in the first antenna array and the second antenna array whose main beam is not deflected, that is, the main beam generated by the antenna array is perpendicular to the array plane, since the phase difference between the feeds of two adjacent rows of antenna elements in the target direction of the antenna array is zero, it can be deduced that the spacing between two adjacent rows of antenna elements in the target direction of the antenna array is half a wavelength. Of course, in actual implementation, the above spacing can also be selected from an appropriate value within the range of greater than half a wavelength or less than half a wavelength.

[0087] In another specific implementation, if the main beam generated by the first antenna array is biased toward the first side relative to the direction perpendicular to the array plane, the spacing between two adjacent rows of antenna elements of the first antenna array in the target direction may not be set completely according to formula (1), but may be selected as an appropriate value within a range less than half a wavelength.

[0088] If the main beam generated by the first antenna array is deflected toward the second side relative to the direction perpendicular to the array plane, the spacing between two adjacent rows of antenna elements of the first antenna array in the target direction may not be set completely according to formula (2), but may be selected as an appropriate value within a range greater than half a wavelength.

[0089] If the main beam generated by the second antenna array is deviated toward the first side relative to the direction perpendicular to the array plane, the spacing between two adjacent rows of antenna elements of the second antenna array in the target direction may not be set completely according to formula (3), but may be selected as an appropriate value within a range greater than half a wavelength.

[0090] If the main beam generated by the second antenna array is deflected toward the second side relative to the direction perpendicular to the array plane, the spacing between two adjacent rows of antenna elements of the second antenna array in the target direction may not be set completely according to formula (4), but may be selected as an appropriate value within a range less than half a wavelength.

[0091] It should be noted that the excitation voltage amplitudes of the antenna elements in a row of antenna elements in the target direction of the first antenna array and the second antenna array are the same. On the basis of the above, if the first antenna array includes M rows of antenna elements in the target direction, the excitation voltage amplitudes of the M rows of antenna elements first increase and then decrease in the target direction; if the second antenna array includes N rows of antenna elements in the target direction, the excitation voltage amplitudes of the N rows of antenna elements first increase and then decrease in the target direction, that is, the tapered distribution is satisfied. For example, in a preferred embodiment, if the first antenna array includes M rows of antenna elements in the target direction, the ratios of the excitation voltage amplitudes of the M rows of antenna elements in the target direction are: If the second antenna array includes N rows of antenna elements in the target direction, the ratios of the excitation voltage amplitudes of these N rows of antenna elements in the target direction are:

[0092] Alternatively, in another scenario, if the first antenna array includes M rows of antenna elements in the target direction, the sum of the excitation voltage amplitudes of the antenna elements in the odd-numbered rows of the M rows is equal to the sum of the excitation voltage amplitudes of the antenna elements in the even-numbered rows of the M rows. If the second antenna array includes N rows of antenna elements in the target direction, the sum of the excitation voltage amplitudes of the antenna elements in the odd-numbered rows of the N rows is equal to the sum of the excitation voltage amplitudes of the antenna elements in the even-numbered rows of the N rows. For example, if the first antenna array includes four rows of antenna elements in the target direction, the sum of the excitation voltage amplitudes of the first and third rows of antenna elements in the target direction is equal to the sum of the excitation voltage amplitudes of the second and fourth rows of antenna elements in the target direction.

[0093] The above provides a general introduction to the antenna arrays in the embodiments of the present application. In actual implementation, at least one of the first and second antenna arrays includes at least three rows of antenna elements in the target direction. In a special case, one of the first and second antenna arrays includes only one row of antenna elements in the target direction, while the other antenna array is configured as described above.

[0094] The antenna system in the embodiment of the present application is introduced below with reference to a more specific design:

[0095] Please refer to Figure 6. In one possible design, the first antenna array is arranged on the upper side and the second antenna array is arranged on the lower side, and the first antenna array and the second antenna array each include three rows of antenna elements in the target direction. In addition, the main beams generated by the first antenna array and the second antenna array do not deflect. Based on the above description, the spacing between two adjacent rows of antenna elements in the target direction of the first antenna array is half a wavelength, and the spacing between two adjacent rows of antenna elements in the target direction of the second antenna array is also half a wavelength. The spacing between the upper edge of the first antenna array and the lower edge of the second antenna array is 5.3 wavelengths. In an optional implementation, the ratio of the excitation voltage amplitudes of the antenna elements in each row of the first antenna array from top to bottom can be set to 1:2:1, and the ratio of the excitation voltage amplitudes of the antenna elements in each row of the second antenna array from top to bottom is also 1:2:1. It should be noted that the above-mentioned ratio relationship of the excitation voltage amplitudes can be achieved by adjusting the feed line width of each row of antenna elements in the power splitter feeding network, and the details will not be elaborated here.

[0096] Please refer to Figure 7. The isolation of the antenna system shown in Figure 6 is analyzed below in combination with the principle. The antenna array in the embodiment of the present application improves isolation based on the principle of interference signal suppression. Taking the first antenna array as an example, each row of antenna elements in the first antenna array mainly radiates the feed signal perpendicular to the array surface. The above feed signal will not affect the second antenna array located below. However, each row of antenna elements will also generate an interference signal. This signal propagates perpendicular to the feed signal to the second antenna array below, resulting in deterioration of the isolation between the two antenna arrays. In Figure 6, the three rows of antenna elements in the first antenna array from top to bottom are respectively recorded as antenna element row I, antenna element row II, and antenna element row III. The interference signal generated by antenna element row I is recorded as c1, the interference signal generated by antenna element row II is recorded as c2, and the interference signal generated by antenna element row III is recorded as c3. Take a reference plane below the first antenna array and assume that the phase of interference signal c3 is 0. It's easy to see that after interference signal c1 propagates one wavelength further than interference signal c3, its phase difference with interference signal c3 is 360°, resulting in it being in phase with interference signal c3. Meanwhile, interference signal c2 propagates half a wavelength further than interference signal c3, resulting in a phase difference of 180°, effectively canceling out interference signals c1 and c3 in anti-phase. Therefore, when the excitation voltage amplitudes of interference signals c1, c2, and c3 satisfy c1 + c3 = c2, the first antenna array can achieve excellent interference signal suppression, preventing interference signals from affecting the second antenna array and achieving good isolation between the first and second antenna arrays. Based on the above description, the excitation voltage amplitudes of interference signal c1: interference signal c2: interference signal c3 can be selected in a ratio of 1:2:1. The principle for achieving excellent interference signal suppression for the second antenna array is similar to that described above and will not be repeated here.

[0097] Referring to Figure 8 , the following schematic diagram illustrates the improved isolation achieved by the antenna system of the present invention compared to prior art antenna systems. In Figure 8 , the vertical axis represents isolation, and the horizontal axis represents the operating frequency of the antenna array. The line labeled "Ori" indicates the isolation between the MT antenna and the DU antenna in the prior art antenna system, while the line labeled "Opt" indicates the isolation between the MT antenna and the DU antenna in the antenna system shown in Figure 6 . The label "PP" in Figure 8 indicates when both the MT antenna and the DU antenna are polarized at +45°; the labels "PN" and "NP" indicate when one of the MT antenna and the DU antenna is polarized at +45° and the other at -45°; and the label "NN" indicates when both the MT antenna and the DU antenna are polarized at -45°. In conjunction with the above description, for example, the line labeled "Ori-PP" in Figure 8 indicates the isolation in the prior art antenna system when both the MT antenna and the DU antenna are polarized at +45°; the line labeled "Opt-PP" indicates the isolation in the antenna system shown in Figure 6 when both the MT antenna and the DU antenna are polarized at +45°. It is not difficult to see that, taking the line marked as “Ori” as the baseline, the isolation between the MT antenna and the DU antenna in the antenna system of the present application is improved by an average of 20 dB.

[0098] Please refer to Figure 9a. The ordinate of Figure 9a represents the gain corresponding to the first antenna array in Figure 6, and the abscissa represents the angle. 0 degrees corresponds to the direction perpendicular to the array plane, 0 to 180 degrees represent clockwise deflections relative to the perpendicular to the array plane, and 0 to -180 degrees represent counterclockwise deflections relative to the perpendicular to the array plane. Areas deflected approximately 90 degrees clockwise relative to the perpendicular to the array plane can be considered interference areas that may affect the second antenna array. Similarly, please refer to Figure 9b. The ordinate of Figure 9b represents the gain corresponding to the second antenna array in Figure 6. 0 degrees corresponds to the direction perpendicular to the array plane, 0 to 180 degrees represent clockwise deflections relative to the perpendicular to the array plane, and 0 to -180 degrees represent counterclockwise deflections relative to the perpendicular to the array plane. Areas deflected approximately 90 degrees counterclockwise relative to the perpendicular to the array plane can be considered interference areas that may affect the first antenna array. In FIG. 9 a and FIG. 9 b , the gains corresponding to the interference areas are relatively low, so the MT antenna and the DU antenna in the antenna system shown in FIG. 6 can obtain good isolation.

[0099] Of course, in the antenna system depicted in FIG6 , the ratio of the excitation voltage amplitudes for the antenna elements in the first and second antenna arrays, from top to bottom, can also be set to other values. Referring to FIG9c , the ordinate represents isolation, and the abscissa represents the ratio of the excitation voltage amplitudes. It is readily apparent that the optimal isolation is achieved when the excitation voltage amplitude ratio is 1:2:1.

[0100] In the embodiment of the present application, the antenna system does not require additional metal fences and metal strip arrays. Good isolation can be achieved by simply adjusting the spacing between two adjacent rows of antenna elements and the ratio of the excitation voltage amplitudes of each row of antenna elements, thereby saving a lot of space.

[0101] Referring to Figure 10 , in another specific design, the first antenna array is positioned at the top, and the second antenna array is positioned at the bottom. Both the first and second antenna arrays include three rows of antenna elements in the target direction, with the upper edge of the first antenna array and the lower edge of the second antenna array spaced 5.3 wavelengths apart. The three rows of antenna elements in the first antenna array in the target direction are spaced d1 and d2, respectively, while the three rows of antenna elements in the second antenna array are spaced d3 and d4, respectively. Furthermore, the main beam generated by the first antenna array is deflected upward by 5 degrees relative to the perpendicular to the array plane, while the main beam generated by the second antenna array is deflected downward by 5 degrees relative to the perpendicular to the array plane. It should be noted that the deflection of the main beams of the first and second antenna arrays can be achieved by adjusting the feeder lengths of each row of antenna elements in the power splitter feed network; this detail will not be elaborated here. In one optional implementation, the ratio of the excitation voltage amplitudes of the antenna elements in each row from top to bottom of the first antenna array can be set to 1:2:1, and the ratio of the excitation voltage amplitudes of the antenna elements in each row from top to bottom of the second antenna array is also 1:2:1. It should be noted that the first antenna array in Figure 10 serves as an MT antenna, and the second antenna array serves as a DU antenna.

[0102] Please refer to Figure 11. The six rows of antenna elements from top to bottom in Figure 10 are labeled antenna element row I, antenna element row II, antenna element row III, antenna element row IV, antenna element row V, and antenna element row VI in Figure 11. The interference signal generated by antenna element row I is labeled c1, the interference signal generated by antenna element row II is labeled c2, the interference signal generated by antenna element row III is labeled c3, the interference signal generated by antenna element row IV is labeled c6, the interference signal generated by antenna element row V is labeled c5, and the interference signal generated by antenna element row VI is labeled c4.

[0103] Based on the feed signal of antenna element row III, the phase lags of the feed signals of antenna element row I and antenna element row II are δ1 and δ2, respectively (δ1>δ2>0). Based on the feed signal of antenna element row IV, the phase lags of the feed signals of antenna element row V and antenna element row VI are δ3 and δ4, respectively (δ4>δ3>0).

[0104] Take a reference plane between the first antenna array and the second antenna array, and the phase difference between the interference signal c1 and the interference signal c3 Satisfies the following formula (5):

[0105]

[0106] Phase difference between interference signal c2 and interference signal c3 Satisfies the following formula (6):

[0107]

[0108] Based on the above formulas (5) and (6), if the interference signal c1 is to be superimposed with the interference signal c3 in phase and canceled out in reverse phase with the interference signal c2, it can be deduced that d1 satisfies And d2 satisfies

[0109] Based on a similar derivation method, we can get d3 to satisfy And d4 satisfies

[0110] Based on the above introduction, the specific values ​​of d1, d2, d3 and d4 can be obtained, thereby achieving interference signal suppression.

[0111] Referring to FIG. 12 , it is not difficult to see that good isolation can also be achieved between the MT antenna and the DU antenna in the antenna system shown in FIG. 10 .

[0112] Please refer to Figure 13a. The vertical axis of Figure 13a represents the gain corresponding to the first antenna array in Figure 10. 0 degrees corresponds to the direction perpendicular to the array, and -5 degrees is the maximum directionality of the main beam generated by the first antenna array. The area deflected clockwise by approximately 90 degrees relative to the perpendicular to the array can be understood as the interference area that will affect the second antenna array. Similarly, please refer to Figure 13b. The vertical axis of Figure 13b represents the gain corresponding to the second antenna array in Figure 10. 0 degrees indicates the direction perpendicular to the array, and +5 degrees is the maximum directionality of the main beam generated by the second antenna array. The area deflected counterclockwise by approximately 90 degrees relative to the perpendicular to the array can be understood as the interference area that will affect the first antenna array. In both Figures 13a and 13b, the gains corresponding to the interference areas are relatively low, thus achieving good isolation between the MT antenna and the DU antenna in the antenna system shown in Figure 10.

[0113] Referring to Figure 14 , in another specific design, the first antenna array is positioned at the top, and the second antenna array is positioned at the bottom. Both the first and second antenna arrays include three rows of antenna elements in the target direction, with the upper edge of the first antenna array and the lower edge of the second antenna array spaced 5.3 wavelengths apart. The three rows of antenna elements in the first antenna array in the target direction are spaced d1 and d2, respectively, while the three rows of antenna elements in the second antenna array are spaced d3 and d4, respectively. Furthermore, the main beam generated by the first antenna array is deflected downward by 5 degrees relative to the vertical plane, while the main beam generated by the second antenna array is deflected upward by 5 degrees relative to the vertical plane. In an optional implementation, the ratio of the excitation voltage amplitudes of the antenna elements in the rows of the first antenna array from top to bottom can be set to 1:2:1, and the ratio of the excitation voltage amplitudes of the antenna elements in the rows of the second antenna array from top to bottom can also be 1:2:1. It should be noted that the first antenna array in Figure 14 functions as a DU antenna, and the second antenna array functions as an MT antenna.

[0114] Please refer to Figure 15. The six rows of antenna elements from top to bottom in Figure 14 are labeled antenna element row I, antenna element row II, antenna element row III, antenna element row IV, antenna element row V, and antenna element row VI in Figure 15. The interference signal generated by antenna element row I is labeled c1, the interference signal generated by antenna element row II is labeled c2, the interference signal generated by antenna element row III is labeled c3, the interference signal generated by antenna element row IV is labeled c6, the interference signal generated by antenna element row V is labeled c5, and the interference signal generated by antenna element row VI is labeled c4.

[0115] Based on the feed signal of antenna element row III, the phase advances of the feed signals of antenna element row I and antenna element row II are δ1 and δ2, respectively (δ1>δ2>0). Based on the feed signal of antenna element row IV, the phase advances of the feed signals of antenna element row V and antenna element row VI are δ3 and δ4, respectively (δ4>δ3>0).

[0116] Take a reference plane between the first antenna array and the second antenna array, and the phase difference between the interference signal c1 and the interference signal c3 Satisfies the following formula (7):

[0117]

[0118] Phase difference between interference signal c2 and interference signal c3 Satisfies the following formula (8):

[0119]

[0120] Based on the above formulas (7) and (8), if the interference signal c1 is to be superimposed with the interference signal c3 in phase and canceled out in reverse phase with the interference signal c2, it can be deduced that d1 satisfies And d2 satisfies

[0121] Based on a similar derivation method, we can get d3 to satisfy And d4 satisfies

[0122] Referring to FIG. 16 , it is not difficult to see that good isolation can also be achieved between the MT antenna and the DU antenna in the antenna system shown in FIG. 14 .

[0123] Please refer to Figure 17a. The vertical axis of Figure 17a represents the gain corresponding to the first antenna array in Figure 14. 0 degrees corresponds to the direction perpendicular to the array, and +5 degrees is the maximum directionality of the main beam generated by the first antenna array. The area deflected clockwise by approximately 90 degrees relative to the perpendicular to the array can be understood as the interference area that will affect the second antenna array. Similarly, please refer to Figure 17b. The vertical axis of Figure 17b represents the gain corresponding to the second antenna array in Figure 14. 0 degrees indicates the direction perpendicular to the array, and -5 degrees is the maximum directionality of the main beam generated by the second antenna array. The area deflected counterclockwise by approximately 90 degrees relative to the perpendicular to the array can be understood as the interference area that will affect the first antenna array. In both Figures 17a and 17b, the gains corresponding to the interference areas are relatively low, thus achieving good isolation between the MT antenna and the DU antenna in the antenna system shown in Figure 14.

[0124] Referring to Figure 18 , in another specific design, the first antenna array is positioned at the top, and the second antenna array is positioned at the bottom. Both the first and second antenna arrays include three rows of antenna elements in the target direction, with the upper edge of the first antenna array and the lower edge of the second antenna array spaced 5.3 wavelengths apart. The three rows of antenna elements in the first antenna array in the target direction are spaced d1 and d2, respectively, while the three rows of antenna elements in the second antenna array are spaced d3 and d4, respectively. Furthermore, the main beam generated by the first antenna array is deflected downward by 5 degrees relative to the perpendicular to the array plane, while the main beam generated by the second antenna array is deflected downward by 5 degrees relative to the perpendicular to the array plane. In an optional implementation, the ratio of the excitation voltage amplitudes of the antenna elements in the first antenna array from top to bottom can be set to 1:2:1, and the ratio of the excitation voltage amplitudes of the antenna elements in the second antenna array from top to bottom can also be set to 1:2:1.

[0125] Please refer to Figure 19. The six rows of antenna elements from top to bottom in Figure 18 are labeled antenna element row I, antenna element row II, antenna element row III, antenna element row IV, antenna element row V, and antenna element row VI in Figure 19. The interference signal generated by antenna element row I is labeled c1, the interference signal generated by antenna element row II is labeled c2, the interference signal generated by antenna element row III is labeled c3, the interference signal generated by antenna element row IV is labeled c6, the interference signal generated by antenna element row V is labeled c5, and the interference signal generated by antenna element row VI is labeled c4.

[0126] Based on the feed signal of antenna element row III, the phase advances of the feed signals of antenna element row I and antenna element row II are δ1 and δ2, respectively (δ1>δ2>0). Based on the feed signal of antenna element row IV, the phase lags of the feed signals of antenna element row V and antenna element row VI are δ3 and δ4, respectively (δ4>δ3>0).

[0127] Take a reference plane between the first antenna array and the second antenna array, and the phase difference between the interference signal c1 and the interference signal c3 Satisfy formula (7):

[0128]

[0129] Phase difference between interference signal c2 and interference signal c3 Satisfy formula (8):

[0130]

[0131] Based on the above formulas (7) and (8), if the interference signal c1 is to be superimposed with the interference signal c3 in phase and canceled out in reverse phase with the interference signal c2, it can be deduced that d1 satisfies And d2 satisfies

[0132] Based on a similar derivation method, we can get d3 to satisfy And d4 satisfies

[0133] Referring to FIG. 20 , it is not difficult to see that good isolation can also be achieved between the MT antenna and the DU antenna in the antenna system shown in FIG. 18 .

[0134] Please refer to Figure 21a. The vertical axis of Figure 21a represents the gain corresponding to the first antenna array in Figure 18. 0 degrees corresponds to the direction perpendicular to the array, and +5 degrees is the maximum directionality of the main beam generated by the first antenna array. The area deflected clockwise by approximately 90 degrees relative to the perpendicular to the array can be understood as the interference area that will affect the second antenna array. Similarly, please refer to Figure 21b. The vertical axis of Figure 21b represents the gain corresponding to the second antenna array in Figure 18. 0 degrees indicates the direction perpendicular to the array, and +5 degrees is the maximum directionality of the main beam generated by the second antenna array. The area deflected counterclockwise by approximately 90 degrees relative to the perpendicular to the array can be understood as the interference area that will affect the first antenna array. In both Figures 21a and 21b, the gains corresponding to the interference areas are relatively low, thus achieving good isolation between the MT antenna and the DU antenna in the antenna system shown in Figure 18.

[0135] This application also provides an antenna mast station, as shown in Figure 22. The antenna mast station includes a mast 2201, a mounting member 2202, a baffle 2203, and an antenna module 2204. The mast 2201 is fixedly connected to the mounting member 2202, which is then fixedly connected to the baffle 2203 and antenna module 2204. The baffle 2203 is disposed between the mast 2201 and the antenna module 2204, and the antenna module 2204 is provided with the aforementioned antenna system. In actual application scenarios, the mast 2201 and the mounting member 2202 may reflect electromagnetic waves, for example, reflecting electromagnetic waves generated by the MT antenna to the DU antenna, thereby reducing isolation. By providing baffle 2203, the electromagnetic waves generated by the MT and DU antennas are scattered or modulated, and the reflection path is constructed so that the reflection range matches the null point range, thereby resolving the aforementioned problem and improving isolation. Please refer to Figure 23. To facilitate understanding of the relative positional relationship between the above-mentioned holding pole 2201, baffle 2203 and antenna system, Figure 23 shows the three-dimensional relationship between the holding pole 2301, baffle 2302 and antenna system 2303.

[0136] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0137] In the several embodiments provided in this application, it should be understood that the disclosed systems and devices can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0138] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of the solution of this embodiment according to actual needs.

Claims

1. An antenna system, characterized in that: The device comprises a first antenna array and a second antenna array, wherein the first antenna array is arranged on a first side and the second antenna array is arranged on a second side; The spacing between two adjacent rows of antenna elements of the first antenna array in the target direction is determined based on the phase difference and wavelength of power fed by the two adjacent rows of antenna elements of the first antenna array in the target direction. The spacing between two adjacent rows of antenna elements of the second antenna array in the target direction is determined based on the phase difference and wavelength of power fed by the two adjacent rows of antenna elements of the second antenna array in the target direction. The target direction points from the first side to the second side, and the wavelength is the wavelength corresponding to the operating frequency band of the first antenna array and the second antenna array.

2. The antenna system according to claim 1, wherein If the main beam generated by the first antenna array is not deflected relative to the direction perpendicular to the array plane, the spacing between the two adjacent rows of antenna elements of the first antenna array in the target direction is half the wavelength.

3. The antenna system according to claim 1, wherein: If the main beam generated by the first antenna array is deviated toward the first side relative to the direction perpendicular to the array plane, the spacing between the two adjacent rows of antenna elements of the first antenna array in the target direction is less than half the wavelength; or, If the main beam generated by the first antenna array is deviated toward the second side relative to the direction perpendicular to the array plane, the spacing between the two adjacent rows of antenna elements of the first antenna array in the target direction is greater than half the wavelength.

4. The antenna system according to claim 3, wherein: If the main beam generated by the first antenna array is biased toward the first side relative to the direction of the vertical array, the spacing d between the two adjacent rows of antenna elements of the first antenna array in the target direction is a satisfy where δ a is the phase difference between the two adjacent rows of antenna elements of the first antenna array in the target direction, and λ is the wavelength; or, If the main beam generated by the first antenna array is deflected toward the second side, then the d a satisfy 5. The antenna system according to any one of claims 1 to 4, characterized in that If the main beam generated by the second antenna array is not deflected relative to the direction perpendicular to the array plane, the spacing between the two adjacent rows of antenna elements of the second antenna array in the target direction is half the wavelength.

6. The antenna system according to any one of claims 1 to 4, characterized in that If the main beam generated by the second antenna array is deviated toward the first side relative to the direction perpendicular to the array plane, the spacing between the two adjacent rows of antenna elements of the second antenna array in the target direction is greater than half the wavelength; or, If the main beam generated by the second antenna array is deviated toward the second side relative to the direction perpendicular to the array plane, the spacing between the two adjacent rows of antenna elements of the second antenna array in the target direction is less than half the wavelength.

7. The antenna system according to claim 6, characterized in that If the main beam generated by the second antenna array is biased toward the first side relative to the direction of the vertical array, the spacing d between the two adjacent rows of antenna elements of the second antenna array in the target direction is b satisfy where δ b The phase difference between the two adjacent rows of antenna elements of the second antenna array fed in the target direction; or, If the main beam generated by the second antenna array is biased toward the second side relative to the direction of the vertical array, the spacing d between the two adjacent rows of antenna elements of the second antenna array in the target direction is b satisfy 8. The antenna system according to any one of claims 1 to 7, characterized in that If the first antenna array includes M rows of antenna elements in the target direction, the excitation voltage amplitudes of the M rows of antenna elements first increase and then decrease in the target direction; if the second antenna array includes N rows of antenna elements in the target direction, the excitation voltage amplitudes of the N rows of antenna elements first increase and then decrease in the target direction.

9. The antenna system according to claim 8, characterized in that The ratios of the excitation voltage amplitudes of the M rows of antenna elements in the first antenna array in the target direction are: The ratios of the excitation voltage amplitudes of the N rows of antenna elements in the second antenna array in the target direction are:

10. The antenna system according to any one of claims 1 to 8, characterized in that If the first antenna array includes M rows of antenna elements in the target direction, the sum of the excitation voltage amplitudes of the antenna elements in the odd rows among the M rows of antenna elements is equal to the sum of the excitation voltage amplitudes of the antenna elements in the even rows among the M rows of antenna elements. If the second antenna array includes N rows of antenna elements in the target direction, the sum of the excitation voltage amplitudes of the antenna elements in the odd rows among the N rows of antenna elements is equal to the sum of the excitation voltage amplitudes of the antenna elements in the even rows among the N rows of antenna elements.

11. The antenna system according to any one of claims 1 to 10, characterized in that The first side is an upper side, and the second side is a lower side; Alternatively, the first side is the left side and the second side is the right side.

12. The antenna system according to any one of claims 1 to 11, characterized in that There is at least one target antenna array in the first antenna array and the second antenna array, and the target antenna array includes at least three rows of antenna elements in the target direction.

13. An antenna system, characterized in that: It includes a first antenna array and a second antenna array, wherein the first antenna array and the second antenna array are respectively arranged on a first side and a second side; The first antenna array includes a row of antenna elements in the target direction, and the spacing between two adjacent rows of antenna elements of the second antenna array in the target direction is determined according to the phase difference fed by the two adjacent rows of antenna elements of the second antenna array in the target direction and the wavelength. The target direction is from the first side to the second side, and the wavelength is the wavelength corresponding to the operating frequency band of the first antenna array and the second antenna array.

14. The antenna system according to claim 13, wherein: If the main beam generated by the second antenna array is not deflected relative to the direction perpendicular to the array plane, the spacing between the two adjacent rows of antenna elements of the second antenna array in the target direction is half the wavelength.

15. The antenna system according to claim 13, wherein: If the second antenna array is arranged on the first side, and the main beam generated by the second antenna array is deviated toward the first side relative to the direction perpendicular to the array plane, then the spacing between the two adjacent rows of antenna elements of the second antenna array in the target direction is less than half the wavelength; or, If the second antenna array is arranged on the first side, and the main beam generated by the second antenna array is biased toward the second side relative to the direction perpendicular to the array plane, then the spacing between the two adjacent rows of antenna elements of the second antenna array in the target direction is greater than half the wavelength.

16. The antenna system according to claim 13, wherein: If the second antenna array is arranged on the second side, and the main beam generated by the second antenna array is deviated toward the first side relative to the direction perpendicular to the array plane, then the spacing between the two adjacent rows of antenna elements of the second antenna array in the target direction is greater than half the wavelength; or, If the second antenna array is arranged on the second side, and the main beam generated by the second antenna array is biased toward the second side relative to the direction perpendicular to the array plane, then the spacing between the two adjacent rows of antenna elements of the second antenna array in the target direction is less than half the wavelength.

17. The antenna system according to claim 15, wherein: If the second antenna array is arranged on the first side, and the main beam generated by the second antenna array is deviated toward the first side relative to the direction perpendicular to the array plane, then the spacing d between the two adjacent rows of antenna elements of the second antenna array in the target direction is a satisfy where δ a is the phase difference between the two adjacent rows of antenna elements of the second antenna array in the target direction, and λ is the wavelength; or, If the second antenna array is arranged on the first side, and the main beam generated by the second antenna array is deflected toward the second side, then the d a satisfy 18. The antenna system according to claim 16, wherein: If the second antenna array is arranged on the second side, and the main beam generated by the second antenna array is deviated toward the first side relative to the direction perpendicular to the array plane, then the spacing d between the two adjacent rows of antenna elements of the second antenna array in the target direction is b satisfy where δ b The phase difference between the two adjacent rows of antenna elements of the second antenna array fed in the target direction; or, If the second antenna array is arranged on the second side, and the main beam generated by the second antenna array is deviated toward the second side relative to the direction perpendicular to the front plane, then the spacing d between the two adjacent rows of antenna elements of the second antenna array in the target direction is b satisfy 19. The antenna system according to any one of claims 13 to 18, characterized in that If the second antenna array includes M rows of antenna elements in the target direction, the excitation voltage amplitudes of the M rows of antenna elements first increase and then decrease in the target direction.

20. The antenna system according to claim 19, wherein The ratios of the excitation voltage amplitudes of the M rows of antenna elements of the second antenna array in the target direction are:

21. The antenna system according to any one of claims 13 to 19, characterized in that If the second antenna array includes M rows of antenna elements in the target direction, the sum of the excitation voltage amplitudes of the antenna elements in odd rows among the M rows of antenna elements is equal to the sum of the excitation voltage amplitudes of the antenna elements in even rows among the M rows of antenna elements.

22. The antenna system according to any one of claims 13 to 21, characterized in that The first side is an upper side, and the second side is a lower side; Alternatively, the first side is the left side and the second side is the right side.

23. The antenna system according to any one of claims 13 to 22, characterized in that The second antenna array includes at least three rows of antenna elements in the target direction.

24. An antenna mast station, characterized in that: The antenna module comprises a holding pole, a mounting member, a baffle, and an antenna module, wherein the antenna system according to any one of claims 1 to 23 is provided in the antenna module; The mounting piece is fixedly connected to the holding pole; The baffle and the antenna module are fixedly connected to the mounting member, and the baffle is arranged between the holding pole and the antenna module.

25. The antenna mast station according to claim 24, characterized in that The baffle is in the shape of a rectangle or a curved surface.

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