Antenna unit and antenna array

Abstract

The embodiment of the invention relates to the technical field of signal processing, and discloses an antenna unit and an antenna array. The antenna unit comprises a radiation unit, a feed unit used for feeding the radiation unit, and at least one coupling unit located around the radiation unit. Corresponding to different feed states of the feed unit, a plurality of phase centers can be generated on the radiation unit, and the plurality of phase centers comprise at least one phase center deviating from the geometric center of the radiation unit; and the coupling unit is coupled with the radiation unit, so that the phase center deviating from the geometric center is deviated to the coupling unit. According to the antenna unit provided by the embodiment of the invention, more virtual antenna units can be realized, the detection range of a radar system can be widened when the antenna unit is applied to the radar system, the performance of the radar system is improved, and the antenna unit is relatively low in cost and easy to realize.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of signal processing technology, and in particular to an antenna unit and an antenna array. Background Art

[0002] In the information age where wireless communication technology is changing with each passing day, short-range wireless communication has been widely used in many fields due to its strong anti-interference ability, high reliability, simple and flexible installation and construction, etc. Millimeter wave radar is an important carrier for realizing short-range wireless communication technology.

[0003] The current mainstream millimeter-wave radar adopts the form of multiple-input multiple-output (MIMO), which can improve the virtual aperture of the radar and thus improve the radar's resolution. For example, a 4-transmitter 4-receiver (4T4R) millimeter-wave radar can obtain 16 virtual antenna units through MIMO. However, in order to increase the number of antenna channels of the millimeter-wave radar after MIMO, the number of transmitting channels and receiving channels needs to be further increased, thereby increasing the cost of the radar system.

[0004] Some baseband algorithms can support more virtual antenna units, but this often brings some negative effects. The combined transmission of multiple Ts can be equivalent to a new transmission unit to form an additional virtual antenna unit. Therefore, through reasonable design, the combined transmission of multiple Ts can be equivalent to a new antenna unit, and because the phase center of its radiation is different from that of a single T transmission, it can generate additional virtual antenna units. However, this solution still needs to be based on the combined transmission of multiple Ts to be equivalent to a new antenna unit, which increases the complexity and cost of the equipment. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide an antenna unit and an antenna array, which can not only realize more virtual antenna units, but also broaden the detection range of the radar system when applied to the radar system, thereby improving the performance of the radar system, and is low-cost and easy to implement.

[0006] To solve the above technical problems, an embodiment of the present application provides an antenna unit, comprising: a radiating unit, a feeding unit for feeding the radiating unit, and at least one coupling unit located around the radiating unit; corresponding to different feeding states of the feeding unit, a plurality of phase centers can be generated on the radiating unit, and the plurality of phase centers include at least one phase center deviating from the geometric center of the radiating unit; the coupling unit is coupled to the radiating unit so that the phase center deviating from the geometric center is offset to the coupling unit.

[0007] On the other hand, an embodiment of the present application further provides an antenna array, comprising: the antenna unit as described above.

[0008] The antenna unit of the embodiment of the present application includes a radiating unit, a feeding unit for feeding the radiating unit, and at least one coupling unit located around the radiating unit. Corresponding to different feeding states of the feeding unit, multiple phase centers, i.e., original phase centers, can be generated on the radiating unit, so that the radiating unit can generate multiple additional virtual antenna units after MIMO, and the performance of the radar system is improved when the radar system is applied, wherein the multiple phase centers include at least one phase center deviating from the geometric center of the radiating unit, and the coupling unit around the radiating unit is coupled with the radiating unit, and the coupling unit can make the multiple phase centers deviating from the geometric center shift to the coupling unit, thereby changing the multiple original phase centers of the radiating unit, making the phase center deviating from the geometric center shift farther, forming multiple target phase centers, that is, realizing the reconstruction of the phase center of the radiating unit, and the radiating unit can not only generate multiple additional virtual antenna units after MIMO, but also make the antenna usable directional pattern wider, thereby broadening the detection range of the radar, and further improving the performance of the radar system, and this method is only implemented by hardware, with low complexity and low cost.

[0009] In some embodiments, the multiple phase centers also include a phase center located at the geometric center of the radiation unit.

[0010] In some embodiments, the radiation unit includes: a radiation patch; corresponding to different feeding states of the feeding unit, a variety of non-uniform current distributions can be formed on the radiation unit, and the current concentration position of each current distribution is used as a phase center.

[0011] In some embodiments, the antenna unit further includes a control module connected to the feeding unit, for controlling the radiating unit to switch between different feeding states, so as to generate a non-uniform current distribution corresponding to each feeding state on the radiating unit.

[0012] In some embodiments, the current concentration position of each current distribution is close to one of the coupling units, so that the coupling unit shifts the current concentration position (ie, the phase center) of the current distribution to the coupling unit.

[0013] In some embodiments, a coupling unit close to a current concentration position of each current distribution is located in a deviation direction of the current concentration position relative to a geometric center of the radiation unit, so that the phase center of the radiation unit is accurately deviated to the coupling unit.

[0014] In some embodiments, the control module is used to control the circuits on the radiation units to generate different phase centers respectively.

[0015] In some embodiments, the radiating unit is provided with a plurality of feeding ports deviating from the geometric center of the radiating unit, and the feeding unit feeds the radiating unit through the feeding ports; the control module is used to control the feeding unit to only feed power to different feeding ports, so that a variety of non-uniform current distributions can be formed on the radiating unit.

[0016] In some embodiments, the radiation unit includes multiple unit blocks, the multiple unit blocks include at least one first unit block directly connected to the feeding unit, and at least one second unit block that can be disconnected from the first unit block; the control module is used to control the number of the second unit blocks connected to the first unit block so that a variety of non-uniform current distributions can be formed on the radiation unit.

[0017] In some embodiments, the number of the second unit blocks and the coupling units is the same and corresponds one to one, and the corresponding second unit blocks and coupling units are located close to each other so that the corresponding coupling units are coupled to the unit blocks and the phase center is offset.

[0018] In some embodiments, the control module is used to control the amplitude and phase of the power fed by the feeding unit to the radiating unit, so that a variety of non-uniform current distributions can be formed on the radiating unit.

[0019] In some embodiments, the number of the feeding ports is two, and the control module is used to control the amplitude of the power fed by the feeding unit to the radiating unit to switch between a combination of 0 and a non-0 first amplitude, both 0 and both the first amplitude, and the phase difference is 0.

[0020] In some embodiments, the number of the feeding ports is two, and the control module is used to control the amplitude of the power fed by the feeding unit to the radiating unit to be the same, and the phase difference is switched between 0 degrees, 90 degrees, 180 degrees and 270 degrees.

[0021] In some embodiments, the radiation unit includes a plurality of unit blocks, and at least two of the plurality of unit blocks receive feeding through one of the feeding ports.

[0022] In some embodiments, the radiation unit includes a plurality of unit blocks, and at least one unit block among the plurality of unit blocks receives feeding through at least two of the feeding ports. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0024] Figure 1 is a schematic diagram of an antenna unit provided according to an embodiment of the present application;

[0025] Figure 2 A schematic diagram of a radiation unit provided according to an embodiment of the present application Figure 1 ;

[0026] Figure 3 A schematic diagram of a radiation unit provided according to an embodiment of the present application Figure 2 ;

[0027] Figure 4 is a schematic diagram of a phase center offset provided according to an embodiment of the present application;

[0028] Figure 5 is a principle diagram of a phase center offset provided according to an embodiment of the present application;

[0029] Figure 6 A schematic diagram of a radiation unit provided according to an embodiment of the present application Figure 3 ;

[0030] Figure 7 is a phase pattern of a radiation unit provided according to an embodiment of the present application;

[0031] Figure 8 A radiation pattern of a radiation unit is provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not be construed as any limitation, and the various embodiments can be combined and referenced with each other without contradiction.

[0033] An embodiment of the present application relates to an antenna unit, including a radiating unit, a feeding unit for feeding the radiating unit, and at least one coupling unit located around the radiating unit. Corresponding to different feeding states of the feeding unit, multiple phase centers, i.e., original phase centers, can be generated on the radiating unit, so that the radiating unit can generate multiple additional virtual antenna units after MIMO, and the performance of the radar system is improved when applied to the radar system, wherein the multiple phase centers include at least one phase center deviating from the geometric center of the radiating unit, and the coupling unit around the radiating unit is coupled to the radiating unit, and the coupling unit can shift the multiple phase centers deviating from the geometric center to the coupling unit, thereby changing the multiple original phase centers of the radiating unit, so that the phase center deviating from the geometric center is shifted farther to form multiple target phase centers, that is, the reconstruction of the phase center of the radiating unit is realized, and then the radiating unit can not only generate multiple additional virtual antenna units after MIMO, but also make the directional pattern that can be used by the antenna wider, thereby broadening the detection range of the radar and further improving the performance of the radar system, and this method is only implemented by hardware, with low complexity and low cost.

[0034] The implementation details of the antenna unit of this embodiment are described in detail below. The following content is only provided for easy understanding of the implementation details and is not necessary for implementing this solution.

[0035] The schematic diagram of the antenna unit of this embodiment can be seen in Figure 1 , specifically comprising: a radiation unit 1, a feeding unit 2 for feeding the radiation unit 1, and at least one coupling unit 3 ( Figure 1 Only two coupling units 3 located on the left and right sides of the radiation unit 1 are shown. The feeding unit 2 is connected to the radiation unit 1 to feed the radiation unit 1.

[0036] Specifically, the feed unit 2 is used to feed the radiation unit 1 so that a non-uniform current distribution is formed on the radiation unit 1, and the feed unit 2 can include a plurality of different feeding states. Corresponding to the plurality of different feeding states, a plurality of different non-uniform current distributions can be formed on the radiation unit 1, wherein the current concentration position of each current distribution can be used as a phase center, and corresponding to the different feeding states of the feed unit 3, a plurality of phase centers can be generated on the radiation unit 1. The coupling unit 3 is located around the radiation unit 1 and is used to couple with the radiation unit 1. The current distribution on the radiation unit 1 can affect the magnetic field coupled on the coupling unit 3, thereby causing the phase center generated on the radiation unit 1 to shift to the coupling unit 3. Among them, the plurality of phase centers include at least one phase center that deviates from the geometric center of the radiation unit 1, so that the coupling unit 3 can shift the phase center to the coupling unit 3. The existence of the plurality of phase centers enables the radiation unit 1 to generate additional virtual antenna units after MIMO. In some embodiments, the plurality of phase centers also include a phase center located at the geometric center of the radiation unit 1.

[0037] The radiation unit 1 includes a radiation patch. In this case, the radiation unit 1 may be as follows: Figure 2 The radiation patch shown in FIG. 1 , the feeding unit 2 feeds the radiation patch (the feeding unit 2 Figure 2 (not shown) to generate multiple phase centers on the radiation patch, two coupling units 3: the first coupling unit and the second coupling unit are respectively located on the left and right sides of the radiation patch, and are respectively coupled with the radiation patch to shift the multiple phase centers generated on the radiation patch to the first coupling unit or the second coupling unit.

[0038] The number of radiation patches can be set according to actual needs. In some embodiments, the number of radiation patches is 2. Figure 3 As shown, the radiation unit 1 includes: a radiation patch 11 and a radiation patch 12, and the feeding unit 2 can feed the radiation patch 11 and / or the radiation patch 12 (the feeding unit 2 Figure 3 (not shown in the figure). Figure 3 Taking the radiation unit 1 shown in FIG. 1 as an example, if the feeding unit 2 feeds the radiation patch 11 but does not feed the radiation patch 12, there will be no current distribution on the radiation patch 12, and only a uniform current distribution will be formed on the radiation patch 11, resulting in a non-uniform current distribution on the entire radiation unit 1, and the current concentration position of the current distribution is Figure 3 At point A shown in the figure, the phase center of the radiation element 1 is located at Figure 3At point A shown in the figure; if the feed unit 2 feeds the radiation patch 12 but does not feed the radiation patch 11, there will be no current distribution on the radiation patch 11, and only a uniform current distribution will be formed on the radiation patch 12, resulting in a non-uniform current distribution on the entire radiation unit 1, and the current concentration position of the current distribution is Figure 3 At point B shown, the phase center of the radiation element 1 is located at Figure 3 At point B shown; if the feed unit 2 feeds the radiation patch 11 and the radiation patch 12 at the same time, a uniform current distribution will be formed on the radiation patch 11 and the radiation patch 12, and the current concentration position of the current distribution on the radiation unit 1 is Figure 3 At point C shown, the phase center of the radiation element 1 is located at Figure 3 At point C shown. It can be understood that Figure 3 In the radiation unit 1 shown, point A and point B are phase centers deviated from the geometric center of the radiation unit 1 , and point C is the phase center located at the geometric center of the radiation unit 1 .

[0039] In some embodiments, the coupling unit 3 needs to be located close to the current concentration position of the current distribution (i.e., the phase center of the radiation unit 1), and the current concentration position of each current distribution (i.e., each phase center) is close to a coupling unit 3. Figure 4 As shown, the corresponding feeding states of the feeding unit 2 (the feeding unit 2 Figure 4 (not shown in the figure), two phase centers are generated on the radiation unit 1: phase center D and phase center E, then the coupling unit 3 needs to include a first coupling unit and a second coupling unit, which are respectively close to the phase center D and the phase center E. The first coupling unit is used to shift the phase center D deviating from the geometric center of the radiation unit 1 to the first coupling unit, and the second coupling unit is used to shift the phase center E deviating from the geometric center of the radiation unit 1 to the second coupling unit.

[0040] In one example, a coupling unit 3 close to the current concentration position of each current distribution is located in the deviation direction of the current concentration position relative to the geometric center of the radiation unit 1, so that Figure 4 Taking the radiation unit 1 and two coupling units 3 (i.e., the first coupling unit and the second coupling unit) shown as an example, the first coupling unit is located in the deviation direction of the phase center D relative to the geometric center of the radiation unit 1, so that the phase center D is accurately offset in the direction of the first coupling unit, and the second coupling unit is located in the deviation direction of the phase center E relative to the geometric center of the radiation unit 1, so that the phase center E is accurately offset in the direction of the second coupling unit.

[0041] In a specific implementation, the coupling unit 3 causes the phase center to shift to the principle diagram of the coupling unit 3. Figure 5 , assuming that two coupling units 3( Figure 5 The first coupling unit and the second coupling unit in the embodiment are located on the left and right sides of the radiation unit 1. After the feeding unit 2 feeds power to the radiation unit 1, if the current on the left side of the radiation unit 1 is greater than the current on the right side, the current induced on the first coupling unit will also be greater than the current induced on the second coupling unit, so that the phase center O of the radiation unit is offset to O' on the first coupling unit. If the current on the right side of the radiation unit 1 is greater than the current on the left side, the current induced on the second coupling unit will also be greater than the current induced on the first coupling unit, so that the phase center O of the radiation unit is offset to O" on the coupling unit B.

[0042] In some embodiments, the antenna unit also includes a control module connected to the feed unit 2, and the switching of different feeding states of the above-mentioned feed unit 2 can be realized by the control module, that is, the control module is used to control the radiation unit 1 to switch under different feeding states so that a non-uniform current distribution corresponding to each feeding state is generated on the radiation unit 1.

[0043] The method of realizing non-uniform current distribution on the radiation unit is as follows:

[0044] In one example, the control module directly controls the circuits on the radiation unit 1 to generate different phase centers.

[0045] In another example, the radiation unit 1 is provided with a plurality of feeding ports deviating from the geometric center of the radiation unit, and the feeding unit 2 can feed the radiation unit 1 through the feeding ports. In this case, the control module is used to control the feeding unit 2 to feed to different feeding ports, so that a non-uniform current distribution is generated on the radiation unit 1, thereby generating a phase center. Figure 2 As shown, the radiation unit 1 is provided with a feeding port M and a feeding port N, and the control module is used to control the feeding unit 2 (not shown in the figure) to feed power to the feeding port M, so that Figure 2 The radiation patch (i.e., the radiation unit 1) generates a non-uniform current distribution, and / or feeds the feeding port N to generate a non-uniform current distribution on the radiation patch, thereby realizing that a variety of non-uniform current distributions can be formed on the radiation unit 1. Or Figure 3 Taking the radiation unit 1 as an example, the control module can control the feeding unit 2 to feed the feeding port M and / or the feeding port N. The generation method of the non-uniform current distribution is the same as the above embodiment, which will not be repeated here.

[0046] In some embodiments, the shape of the radiation unit 1 may be changed to achieve various non-uniform current distributions on the radiation unit 1 .

[0047] Specifically, the schematic diagram of the radiation unit 1 of this embodiment can be seen in Figure 6The radiation unit 1 includes a plurality of unit blocks, wherein the plurality of unit blocks include at least one first unit block directly connected to the feed unit 2, and at least one second unit block disconnectable from the first unit block ( Figure 6 Only one first unit block and one second unit block are shown in the figure. Since the second unit block can be disconnected from the first unit block, the overall shape and size of the radiation unit 1 can be changed by increasing or decreasing the number of the second unit blocks connected to the first unit block. For radiation units 1 of different shapes and sizes, after the feeding unit 2 is fed, a variety of different non-uniform current distributions will be generated on the radiation unit 1. Therefore, the current distribution on the radiation unit 1 can be adjusted by controlling the number of the second unit blocks connected to the first unit block.

[0048] In one example, a control module may be used to control the number of the second unit blocks connected to the first unit blocks, so that a variety of non-uniform current distributions may be formed on the radiation unit 1 .

[0049] In one example, the number of second unit blocks and coupling units 3 is the same and corresponds one to one, and the positions of the corresponding second unit blocks and coupling units 3 are close to each other. Since the number of second unit blocks connected to the first unit blocks is controlled, a variety of non-uniform current distributions can be formed on the radiation unit 1, and each time a second unit block is added, the non-uniform current distribution on the radiation unit 1 changes, and for each non-uniform current distribution on the radiation unit 1, the current concentration position of the current distribution needs to be close to a coupling unit 3, that is, each time a second unit block is added, a coupling unit 3 needs to be added accordingly, and the positions of the added second unit block and the corresponding added coupling unit 3 are close to each other.

[0050] In some embodiments, the radiation unit 1 includes multiple unit blocks, at least two of the multiple unit blocks receive feed through a feeding port, so as to adjust the uneven current distribution formed on the radiation unit 1. In other embodiments, at least one of the multiple unit blocks receives feed through at least two feeding ports, so as to adjust the uneven current distribution formed on the radiation unit 1.

[0051] In some embodiments, the various non-uniform current distributions formed on the radiation unit 1 described in the above embodiments can be achieved by changing the amplitude and phase of the power fed by the feeding unit 2 to the radiation unit 1, and the amplitude and phase of the power fed by the feeding unit 2 to the radiation unit 1 can be controlled by the control module.

[0052] In one example, if the number of feeding ports provided on the radiation unit 1 is two, the control module can control the amplitude of the power fed by the feeding unit 2 to the radiation unit 1 to switch between a combination of 0 and a first amplitude that is not 0, both 0 and both the first amplitude, and the phase difference is 0. Figure 3 As shown, the radiation unit 1 is provided with a feeding port M and a feeding port N, and the feeding unit 2 can be controlled to feed the radiation unit 1 in the following modes, as shown in Table 1:

[0053] Table 1

[0054]

[0055] It can be seen that mode 1 corresponds to the feed unit 2 feeding the feed port M of the radiation unit 1 but not feeding the feed port N, at which time the phase center of the radiation unit 1 is located at point A; mode 2 corresponds to the feed unit 2 feeding the feed port N of the radiation unit 1 but not feeding the feed port M, at which time the phase center of the radiation unit 1 is located at point B; mode 3 corresponds to the feed unit 2 feeding the feed port M and feed port N of the radiation unit 1 at the same time, at which time the phase center of the radiation unit 1 is located at point C. Assuming that there are 2 receiving antenna units in the radar system at this time, after the staggered transmission of the three modes of the antenna units mentioned above, MIMO can be used to generate 3*2=6 virtual antenna units, thereby improving the performance of the radar system.

[0056] In another example, if the number of feeding ports provided on the radiation unit 1 is two, the control module can control the amplitude of the feeding unit 2 feeding the radiation unit 1 to be the same, and the phase difference is switched between 0 degrees, 90 degrees, 180 degrees and 270 degrees. Figure 2 As shown, the radiation unit 1 is provided with a feeding port M and a feeding port N, and the left and right sides of the radiation unit 1 are provided with a coupling unit A and a coupling unit B. Then, the feeding unit 2 can be controlled to feed the radiation unit 1 in the following modes, as shown in Table 2:

[0057] Table 2

[0058]

[0059] It can be seen that mode 1 corresponds to the feeding unit 2 feeding the feeding port M and the feeding port N of the radiating unit 1 at the same time and the feeding amplitude is equal, but the phase of the feeding at the feeding port M is delayed by 90° relative to the phase of the feeding at the feeding port N. At this time, the current on the radiating unit 1 is non-uniformly distributed, and a current much larger than that on the coupling unit B is induced on the coupling unit A, so that the phase center of the radiating unit 1 is shifted to point A on the coupling unit A; mode 2 corresponds to the feeding unit 2 feeding the feeding port M and the feeding port N of the radiating unit 1 at the same time and feeding The amplitudes of the electricity are equal, but the phase of the electricity fed at the feeding port N is delayed by 90° relative to the phase of the electricity fed at the feeding port M. At this time, the current on the radiating element 1 is unevenly distributed, and a current much larger than that on the coupling unit A will be induced on the coupling unit B, so that the phase center of the radiating element 1 is shifted to point B on the coupling unit B; Mode 3 corresponds to that the feeding unit 2 feeds the feeding port M and the feeding port N of the radiating element 1 at the same time, and the amplitude and phase of the electricity fed are equal. At this time, the phase center of the radiating element 1 is located at the geometric center of the radiating element 1, that is, point C.

[0060] Figure 7 The phase pattern of the radiation unit 1 in the three modes of Table 2 is shown. It can be seen from the figure that in these three modes, the radiation phase has no reversal point at ±90°. Figure 8 The far-field radiation pattern of the radiation unit 1 in three modes of Table 2 is shown. It can be seen from the figure that in these three modes, there are no side lobes in the radiation pattern.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] Another embodiment of the present application relates to an antenna array, comprising the antenna unit described in the above embodiment.

[0063] It is not difficult to find that this embodiment is an antenna array embodiment corresponding to the previous embodiment, and this embodiment can be implemented in conjunction with the previous embodiment. The relevant technical details mentioned in the previous embodiment are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the previous embodiment.

[0064] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. An antenna unit, characterized in that: include: A radiation unit, a feeding unit for feeding the radiation unit, and at least one coupling unit located around the radiation unit; Corresponding to different feeding states of the feeding unit, a plurality of phase centers may be generated on the radiating unit, wherein the plurality of phase centers include at least one phase center deviating from the geometric center of the radiating unit; The coupling unit is coupled to the radiation unit so that the phase center deviating from the geometric center is shifted to the coupling unit.

2. The antenna unit according to claim 1, characterized in that The multiple phase centers also include a phase center located at the geometric center of the radiation unit.

3. The antenna unit according to claim 1 or 2, characterized in that: The radiation unit includes: a radiation patch; Corresponding to different feeding states of the feeding unit, a variety of non-uniform current distributions can be formed on the radiating unit, and the current concentration position of each current distribution is used as a phase center.

4. The antenna unit according to claim 3, characterized in that Also includes: The control module connected to the feeding unit is used to control the radiating unit to switch between different feeding states, so that a non-uniform current distribution corresponding to each feeding state is generated on the radiating unit.

5. The antenna unit according to claim 4, characterized in that The current concentration position of each current distribution is respectively close to one of the coupling units.

6. The antenna unit according to claim 5, characterized in that One of the coupling units close to the current concentration position of each current distribution is located in the deviation direction of the current concentration position relative to the geometric center of the radiation unit.

7. The antenna unit according to claim 5 or 6, characterized in that: The control module is used to control the circuits on the radiation units to generate different phase centers respectively.

8. The antenna unit according to claim 3, characterized in that: The radiating unit is provided with a plurality of feeding ports deviating from the geometric center of the radiating unit, and the feeding unit feeds power to the radiating unit through the feeding ports; The control module is used to control the feeding unit to feed power to different feeding ports, so that a variety of non-uniform current distributions can be formed on the radiation unit.

9. The antenna unit according to claim 3, characterized in that: The radiation unit includes a plurality of unit blocks, wherein the plurality of unit blocks include at least one first unit block directly connected to the feeding unit, and at least one second unit block disconnectable from the first unit block; The control module is used to control the number of the second unit blocks connected to the first unit block, so that a variety of non-uniform current distributions can be formed on the radiation unit.

10. The antenna unit according to claim 9, characterized in that The number of the second unit blocks and the coupling units is the same and they correspond one to one, and the corresponding second unit blocks and the coupling units are located close to each other.

11. The antenna unit according to claim 3, characterized in that: The control module is used to control the amplitude and phase of the power fed by the feeding unit to the radiating unit, so that a variety of non-uniform current distributions can be formed on the radiating unit.

12. The antenna unit according to claim 11, characterized in that The number of the feeding ports is two; The control module is used to control the amplitude of the power fed by the feeding unit to the radiating unit to switch between a combination of 0 and a first amplitude that is not 0, both being 0, and both being the first amplitude, while the phase difference is 0.

13. The antenna unit according to claim 11, characterized in that The number of the feeding ports is two; The control module is used to control the amplitude of the power fed by the feeding unit to the radiating unit to be the same, and the phase difference is switched between 0 degree, 90 degrees, 180 degrees and 270 degrees.

14. The antenna unit according to claim 8, characterized in that The radiation unit includes a plurality of unit blocks, at least two of which receive feeding through one of the feeding ports.

15. The antenna unit according to claim 8, characterized in that The radiation unit includes a plurality of unit blocks, and at least one unit block among the plurality of unit blocks receives feeding through at least two of the feeding ports.

16. An antenna array, characterized in that: The invention comprises a plurality of antenna units according to any one of claims 1 to 15.

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