A lens antenna, communication device
Patent Information
- Application Number
- CN202580000141.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-10-20
AI Technical Summary
In the prior art, increasing the size of the Luneburg lens or increasing the number of elements to improve antenna gain leads to an increase in antenna size and weight, and is not conducive to forming a narrow beam with high gain.
Multiple lens units are used, each unit including an electromagnetic wave lens and an array. The high-frequency signal is distributed to two arrays with different powers through a bridge, so that they radiate electromagnetic waves of different energies in the same direction. The arrays are superimposed in phase at the same position to improve the gain.
Without increasing the size of the lens, the antenna gain is improved, the beamwidth is reduced, the structure is simple, it is easy to mass-produce, and it can cover signals in different frequency bands and directions.
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Abstract
Description
A lens antenna, a communication device Technical Field
[0001] This disclosure relates to the field of communication technology, and in particular to a lens antenna and a communication device. Background Technology
[0002] In the field of communications, Luneburg lenses are widely used in high-speed rail, marine, and large venues due to their advantages such as high gain and high isolation.
[0003] Antenna gain measures an antenna's ability to transmit and receive signals in a specific direction; a higher antenna gain indicates stronger signal transmission and reception capabilities. In related technologies, antenna gain can be increased by either increasing the size of the Luneburg lens or by increasing the number of corresponding elements in the Luneburg lens.
[0004] However, increasing the volume of the Luneburg lens will increase the size of the Luneburg lens antenna, which will not only increase the size and weight of the Luneburg lens antenna, but also affect the antenna coverage performance; while increasing the number of corresponding elements of the Luneburg lens will form beams pointing in different directions, which is not conducive to improving the antenna gain.
[0005] Therefore, how to effectively improve the gain of Luneburg lens antennas without increasing the size of the Luneburg lens has become an urgent technical problem to be solved. Summary of the Invention
[0006] This disclosure provides a lens antenna and a communication device to solve the aforementioned technical problems existing in the prior art.
[0007] In a first aspect, to solve the above-mentioned technical problems, embodiments of this disclosure provide a lens antenna, comprising:
[0008] Multiple lens units, each lens unit including an electromagnetic wave lens and an array, each array being positioned at the same location as the corresponding electromagnetic wave lens;
[0009] At least one bridge circuit has two first input terminals and two first output terminals; a first portion of the power of a high-frequency signal transmitted from the first input terminals is output from one of the two first output terminals, and the remaining second portion of the power is output from the other of the two output terminals, wherein the first portion of the power is greater than the second portion of the power; the two first output terminals output the first portion of the power corresponding to different first input terminals, and each first output terminal is connected to an array.
[0010] In one possible implementation, the bridge is a broadband bridge, and the lens antenna further includes:
[0011] A combiner, wherein a second output terminal of the combiner is connected to a first input terminal; the combiner has at least two second input terminals, each of which receives a high-frequency signal in a different frequency band.
[0012] In one possible implementation, the lens antenna further includes:
[0013] A switch having a third input and two third outputs; each first input of each bridge is connected to a third output of the switch, and the other third input of the switch is connected to a first output of each bridge.
[0014] One possible implementation is that the switch includes a single-pole double-throw switch.
[0015] In one possible implementation, the lens antenna includes multiple bridges, and the total number of the multiple lens elements is twice the total number of the multiple bridges;
[0016] The two elements connected to the bridge are arranged adjacent to each other, or an element connected to the bridge is arranged between the two elements connected to the bridge.
[0017] One possible implementation is that the bridge includes a broadband bridge and a frequency-selective bridge.
[0018] One possible implementation is that the electromagnetic wave lens includes a Luneburg lens.
[0019] One possible implementation of the Luneburg lens includes:
[0020] Any one of the following: spherical Luneburg lens, cylindrical Luneburg lens, and planar Luneburg lens.
[0021] In one possible implementation, the plurality of lens units are arranged along a first direction, which is a vertical direction.
[0022] In a second aspect, embodiments of this disclosure provide a communication device including a lens antenna as described in the first aspect. Attached Figure Description
[0023] Figure 1 is a schematic diagram of a Luneburg lens;
[0024] Figure 2 is a schematic diagram of the beam radiation of a Luneburg lens antenna provided in an embodiment of this disclosure;
[0025] Figure 3 is a schematic diagram of a lens antenna provided in an embodiment of this disclosure;
[0026] Figure 4 is a schematic diagram of another lens antenna provided in an embodiment of this disclosure;
[0027] Figure 5 is a schematic diagram of another lens antenna provided in an embodiment of this disclosure;
[0028] Figure 6 is a schematic diagram of another lens antenna provided in an embodiment of this disclosure;
[0029] Figure 7 is a schematic diagram of another lens antenna provided in an embodiment of this disclosure;
[0030] Figures 8 and 9 are schematic diagrams of another lens antenna provided in an embodiment of this disclosure;
[0031] Figure 10 is a schematic diagram of another lens antenna provided in an embodiment of this disclosure.
[0032] Reference numerals: Luneburg lens 1', element 2'; lens unit 1, electromagnetic wave lens 11, element 12, bridge 2, first input terminal 21, first output terminal 22, first direction X, combiner 3, second input terminal 31, second output terminal 32, switch 4, third input terminal 41, third output terminal 42. Detailed Implementation
[0033] This disclosure provides a lens antenna and a communication device to solve the aforementioned technical problems existing in the prior art.
[0034] It should be understood that the specific structural and functional details disclosed in the embodiments of this disclosure are merely representative and are intended to describe exemplary embodiments of this disclosure. However, this disclosure can be implemented in many alternative or combined forms and should not be construed as being limited solely to the embodiments set forth herein.
[0035] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more. Furthermore, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.
[0036] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0037] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms “a” and “an” as used herein are also intended to include the plural. It should also be understood that the terms “comprising” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, without excluding the presence or addition of one or more other features, integers, steps, operations, units, components, and / or combinations thereof.
[0038] To make the above-described objects, features, and advantages of this disclosure more apparent and understandable, the disclosure will be further described below in conjunction with the accompanying drawings and embodiments. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the disclosure more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. Terms describing position and direction as described in this disclosure are illustrative of the accompanying drawings, but changes may be made as needed, and all such changes are included within the scope of protection of this disclosure. The accompanying drawings of this disclosure are for illustrative purposes only and do not represent actual scale.
[0039] It should be noted that specific details are set forth in the following description to provide a full understanding of this disclosure. However, this disclosure can be implemented in many ways other than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this disclosure. Therefore, this disclosure is not limited to the specific embodiments disclosed below. The following descriptions are preferred embodiments for carrying out this disclosure; however, these descriptions are for the purpose of illustrating the general principles of this disclosure and are not intended to limit the scope of this disclosure. The scope of protection of this disclosure shall be determined by the appended claims.
[0040] Please refer to Figure 1, which is a schematic diagram of a Luneburg lens. The relative permittivity of the Luneburg lens 1' changes continuously from the center O to the surface of the sphere (as shown in Figure 1, the relative nodal constant at the center is 2, the relative permittivity at the surface is 1, and the relative permittivity from the center to the surface gradually changes from 2 to 1). The spherical wave radiated from the feed source located at the focal point of the Luneburg lens 1' is refracted and converged by the Luneburg lens 1', and finally converted into a plane wave for radiation.
[0041] Using Luneburg lens 1' in an antenna has the following advantages:
[0042] By placing multiple feed sources at the focal point on the surface of the sphere, multiple beams can be achieved, and each beam has the same radiation characteristics.
[0043] The operating frequency band depends on the feed source and is independent of the lens medium material;
[0044] Luneburg lens 1' is made of dielectric material, which is cheaper and simpler in structure than expensive and complex phased array antennas, making it more suitable for mass production.
[0045] In related technologies, the gain of the Luneburg lens 1' antenna can be improved by increasing the volume of the Luneburg lens 1' or increasing the number of corresponding elements 2' (i.e., feed sources) of the Luneburg lens 1'. However, increasing the volume of the Luneburg lens 1' not only increases the size and weight of the Luneburg lens 1' antenna, but also affects its coverage performance. If the number of corresponding elements 2' of the Luneburg lens 1' is increased, the inventors have found that since the different elements 2' are positioned at different points on the surface of the Luneburg lens 1', the elements 2' are positioned at different focal points of the Luneburg lens 1'. This causes the electromagnetic waves radiated by the different elements 2' to propagate in different directions after being converged by the Luneburg lens 1'. Consequently, increasing the number of elements 2' will not only fail to form a narrower beam with higher gain, but will instead form two beams pointing in different directions. Figure 2 shows a schematic diagram of the beam radiation of a Luneburg lens 1' antenna provided in an embodiment of this disclosure.
[0046] If the distance between the two elements 2' in Figure 2 is shortened, although the beam separation problem can be improved to some extent, it will cause severe crosstalk between the two elements 2', resulting in a serious reduction in the various electrical performance indicators of the elements 2'.
[0047] To address the aforementioned technical problems, this disclosure provides a lens antenna and a communication device, which will be described in detail below with reference to the accompanying drawings.
[0048] Please refer to Figure 3, which is a schematic diagram of a lens antenna provided in an embodiment of this disclosure. The lens antenna includes:
[0049] Multiple lens units 1, each lens unit 1 includes an electromagnetic wave lens 11 and an array 12, and each array 12 is set at the same position as the corresponding electromagnetic wave lens 11;
[0050] At least one bridge 2 has two first input terminals 21 and two first output terminals 22. A first part of the power of the high-frequency signal transmitted from the first input terminal 21 is output from one of the two first output terminals 22 (denoted as 22(a)), and the remaining second part of the power is output from the other of the two first output terminals 22 (denoted as 22(b)). The first part of the power is greater than the second part of the power. The two first output terminals 22 output the first part of the power corresponding to different first input terminals 21. Each first output terminal 22 is connected to an array 12.
[0051] For example, in Figure 3, the first part of the power of the radio frequency signal 1 input from the first input terminal 21(a) is output from the first output terminal 22(a), and the remaining second part of the power is output from the first output terminal 22(b). In this way, the radio frequency signal 1 passes through the electromagnetic waves with different energies radiated by the two first output terminals 22, causing the two electromagnetic waves with different energies to squeeze each other in the first direction X, reducing the beamwidth in the first direction X and increasing the antenna gain. Similarly, the first part of the power of the radio frequency signal 2 input from the first input terminal 21(b) is output from the first output terminal 22(b), and the remaining second part of the power is output from the first output terminal 22(a). In this way, the radio frequency signal 2 passes through the electromagnetic waves with different energies radiated by the two first output terminals 22, causing the two electromagnetic waves with different energies to squeeze each other in the first direction X, reducing the beamwidth in the first direction X and increasing the antenna gain. Furthermore, since the two elements 12 connected to the bridge 2 are set at the same position as their respective electromagnetic wave lenses 11, the radiation directions of their respective electromagnetic waves are the same, thereby achieving in-phase superposition in space to further improve the gain of the lens antenna. Since the above solution does not require increasing the size of the electromagnetic wave lens 11, it can improve the antenna gain without increasing the antenna weight, and the structure is simple and easy to mass-produce.
[0052] Please refer to Table 1, which is a comparison table of the effects of different power allocation ratios of the bridge 2 in Figure 3 on the far-field radiation pattern of the lens antenna provided in the embodiments of this disclosure.
[0053] Table 1
[0054] As can be seen from Table 1, the 3dB horizontal bandwidth of the lens antenna remains almost unchanged, while the vertical bandwidth narrows and the antenna gain is significantly improved.
[0055] It is important to understand that when the two lens antennas in Figure 3 are arranged vertically, the antenna gain can be improved by narrowing the vertical beamwidth; when the two lens antennas in Figure 3 are arranged horizontally, the antenna gain can be improved by narrowing the horizontal beamwidth.
[0056] As shown in Figure 3, multiple lens units 1 are arranged along the first direction X, which is the vertical direction.
[0057] Since narrowing the horizontal beamwidth may affect the coverage performance of the antenna in some scenarios, this disclosure arranges multiple lens elements 1 in a vertical straight array to narrow the vertical (i.e., vertical) beamwidth without narrowing the horizontal beamwidth, thereby improving the gain of the lens antenna without reducing its coverage performance.
[0058] In some embodiments, the electromagnetic wave lens 11 includes a Luneburg lens. By setting the electromagnetic wave lens 11 as a Luneburg lens, the manufacturing difficulty of the lens antenna can be reduced and it is suitable for mass production.
[0059] In some embodiments, the Luneburg lens includes any one of a spherical Luneburg lens, a cylindrical Luneburg lens, and a planar Luneburg lens.
[0060] In the embodiments provided in this disclosure, multiple lens units 1 are set, each including an electromagnetic wave lens 11 and an array 12. Each array 12 is positioned at the same location as the corresponding electromagnetic wave lens 11. A bridge 2 distributes the same electromagnetic wave signal to two arrays 12 connected to the bridge 2 with different powers, causing the electromagnetic waves radiated by the two arrays 12 to overlap in the first direction X, reducing the beamwidth in the first direction X and increasing the antenna gain. Since each array 12 is positioned at the same location as the corresponding electromagnetic wave lens 11, each lens unit 1 radiates electromagnetic waves in the same direction, resulting in in-phase superposition in three-dimensional space, effectively improving the gain of the lens antenna. Because the above solution does not require increasing the size of the electromagnetic wave lens 11, it improves the antenna gain without increasing the antenna weight, and has a simple structure that is easy to mass-produce.
[0061] For lens antennas, the beamwidth of high-frequency bands is typically narrower than that of low-frequency bands, resulting in inconsistent beamwidths across different frequency bands. Please refer to Figure 4, which is a schematic diagram of another lens antenna structure provided in an embodiment of this disclosure; the bridge 2 can be a frequency-selective bridge.
[0062] Because the frequency-selective bridge allocates power differently for different frequency bands, in the low-frequency band, the power of the first part is reduced and the power of the second part is increased (but the power of the first part is still greater than the power of the second part), so that the element 12 receiving the power of the second part receives more energy, and the beamwidth radiated by the lens antenna is reduced more significantly. In the high-frequency band, the power of the first part is increased and the power of the second part is decreased, but the power of the first part is still greater than the power of the second part, so that the element 12 receiving the power of the second part receives less energy, and the beamwidth radiated by the lens antenna is less effective. This makes the beamwidth of different frequency bands tend to be consistent, thus improving the consistency of the beamwidth of the lens antenna.
[0063] Please refer to Figure 5, which is a schematic diagram of another lens antenna provided in this embodiment of the present disclosure. The bridge 2 is a broadband bridge, and the lens antenna further includes:
[0064] Combiner 3, the second output terminal 32 of combiner 3 is connected to one of the first input terminals 21; the combiner 3 has at least two second input terminals 31, and each second input terminal 31 of the combiner 3 receives a different frequency band of high-frequency signal.
[0065] As shown in Figure 5, the lens antenna consists of two lens units 1, a broadband bridge, and two combiners 3. Each first input terminal 21 of the bridge 2 is connected to the second output terminal 32 of the combiner 3. The combiner 3 has two second input terminals 31. One second input terminal 31 (denoted as 31(a)) receives the high-frequency signal of frequency band 1, and the other second input terminal 31 (denoted as 31(b)) receives the high-frequency signal of frequency band 2. By using different second input terminals 31 of the combiner 3, high-frequency signals of different frequency bands can be selected, so that the lens antenna can cover multiple frequency bands at the same time. The broadband bridge can distribute the high-frequency signals of different frequency bands to the two elements 12 in a certain proportion, thereby improving the antenna gain while covering multiple frequency bands.
[0066] It should be understood that Figure 5 only shows the case where the combiner 3 has two second input terminals 31. In practical applications, the combiner 3 can also have more second input terminals 31. There is no specific limit to the number of second input terminals 31 that the combiner 3 has.
[0067] In the embodiments provided in this disclosure, when the bridge 2 is a broadband bridge, a combiner 3 is provided at the first input terminal 21 of each bridge 2, and the combiner 3 has at least two second input terminals 31. The frequency bands of the high-frequency signals received by each input terminal of the combiner 3 are different, so that the lens antenna can cover multiple frequency bands at the same time. The broadband bridge can distribute the high-frequency signals of different frequency bands to the two elements 12 connected to the bridge 2 in a certain proportion, thereby improving the antenna gain while covering multiple frequency bands.
[0068] Please refer to Figure 6, which is a schematic diagram of another lens antenna provided in an embodiment of this disclosure. The lens antenna further includes:
[0069] Switch 4 has a third input terminal 41 and two third output terminals 42; each first input terminal 21 of each bridge 2 is connected to a third output terminal 42 of switch 4, and the other third input terminal 41 of switch 4 is connected to a corresponding first output terminal 22 of each bridge 2.
[0070] As shown in Figure 6, a switch 4 is provided at each first input terminal 21 of the bridge 2. Each first input terminal 21 of the bridge 2 is connected to a third output terminal 42 of the switch 4 (denoted as 42(a)), and the other third output terminal 42 of the switch 4 (denoted as 42(b)) is connected to a first output terminal 22 of the bridge 2 (denoted as 22(a)). The switch 4 can be used to select whether the radio frequency signal input from the third input terminal 41 of the switch 4 is provided to the first output terminal 22 of the bridge 2 or directly to the array 12 connected to the first output terminal 22 of the bridge 2. Thus, when it is necessary to use the bridge 2 to increase the gain of the lens antenna, the switch 4 is used to connect the third input terminal 41 to the first input terminal 21 of the bridge 2. When it is not necessary to increase the gain, the third input terminal 41 is connected to the corresponding array 12, so that the lens antenna can radiate beams with different gains.
[0071] It should be understood that the lens antenna in Figure 6 includes two lens units 1. When the lens antenna includes more lens units 1 (such as four lens units 1), the number of bridge 2 and the number of switches 4 will also increase accordingly.
[0072] In the embodiments provided in this disclosure, by setting a switch 4 at the first input terminal 21 of each bridge 2, and connecting a third output terminal 42 of the switch 4 to a first input terminal 21 of the bridge 2, and connecting another third input / output segment 41 of the switch 4 to a first output terminal 22 of the bridge 2, the switch 4 can be used to control the lens antenna to radiate beams with different gains.
[0073] Please refer to Figure 7, which is a schematic diagram of another lens antenna provided in an embodiment of this disclosure. When the bridge 2 is a broadband bridge, the schemes in Figure 6 and Figure 5 can be combined to enable the lens antenna to achieve wide beam coverage while also switching between different gains. Of course, Figure 4 can also be combined with the scheme in Figure 6, which will not be elaborated here.
[0074] In some embodiments, switch 4 includes a single-pole double-throw switch 4, which facilitates switching between bridge 2 and element 12.
[0075] Please refer to Figures 8 and 9 for another schematic diagram of the structure of a lens antenna provided in an embodiment of this disclosure. The lens antenna includes multiple bridges 2, and the total number of multiple lens units 1 is twice the total number of multiple bridges 2.
[0076] As shown in Figure 8, the two arrays 12 connected to the bridge 2 are arranged adjacent to each other, or as shown in Figure 9, an array 12 connected to the bridge 2 is arranged between the two arrays 12 connected to the bridge 2.
[0077] Figures 8 and 9 both include two bridges 2 and four lens units 1. In Figure 8, each bridge 2 is connected to the corresponding array 12 of two adjacent lens units 1. In Figure 9, a lens unit 1 is set between the two lens units 1 connected to each bridge 2. By increasing the number of lens units 1 arranged in the first direction X, and when the bridge 2 is connected to two adjacent arrays 12, or when the two arrays 12 connected to the bridge 2 are spaced apart by one array 12, the beamwidth of the lens antenna in the first direction X can be further reduced, and the antenna gain can be further improved.
[0078] Furthermore, the schemes of setting the switch 4 and bridge 2 in the aforementioned embodiments as frequency-selective bridges and broadband bridges can be arbitrarily combined with the schemes in Figure 8 or Figure 9, which will be described in detail here.
[0079] Please refer to Figure 10, which is a schematic diagram of another lens antenna provided in an embodiment of this disclosure.
[0080] Multiple lens elements 1 can also be arranged in a planar array. In this case, the connection between the bridge 2 and the array element 12 can be as shown in Figure 8 or Figure 9. By setting multiple lens elements 1 in a planar array, the antenna gain can be further improved.
[0081] It should be understood that in practical applications, the bridge 2 and multiple lens units 1 are usually not located on the same plane. Therefore, the placement of the bridge 2 in Figure 10 does not represent the actual placement, and the spacing between two adjacent lens units 1 does not represent the actual spacing. Figure 10 is only used to illustrate the relative positional relationship between the element 12 and the electromagnetic wave lens 11 in the lens unit 1, and the connection relationship between the bridge 2 and the element 12. In addition, the schemes of setting the switch 4 and the bridge 2 as a frequency-selective bridge or a broadband bridge in the aforementioned embodiments can be arbitrarily combined with the scheme in Figure 10, which will be described in detail here.
[0082] Based on the same inventive concept, this disclosure provides a communication device that includes a lens antenna as described above.
[0083] This communication device can be installed on wireless communication equipment such as mobile phones, base stations, airplanes, and satellites. Base stations can be installed along high-speed rail lines, at sea, and in large venues.
[0084] Although preferred embodiments of this disclosure have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this disclosure.
[0085] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.
Claims
1. A lens antenna, wherein, include: Multiple lens units, each lens unit including an electromagnetic wave lens and an array, each array being positioned at the same location as the corresponding electromagnetic wave lens; At least one bridge circuit has two first input terminals and two first output terminals; a first portion of the power of a high-frequency signal transmitted from the first input terminals is output from one of the two first output terminals, and the remaining second portion of the power is output from the other of the two output terminals, wherein the first portion of the power is greater than the second portion of the power; the two first output terminals output the first portion of the power corresponding to different first input terminals, and each first output terminal is connected to an array.
2. The lens antenna as described in claim 1, wherein, The bridge is a broadband bridge, and the lens antenna further includes: A combiner, wherein a second output terminal of the combiner is connected to a first input terminal; the combiner has at least two second input terminals, each of which receives a high-frequency signal in a different frequency band.
3. The lens antenna as described in claim 1 or 2, wherein, The lens antenna also includes: A switch having a third input and two third outputs; each first input of each bridge is connected to a third output of the switch, and the other third input of the switch is connected to a first output of each bridge.
4. The lens antenna as described in claim 3, wherein, The switch includes a single-pole double-throw switch.
5. The lens antenna according to any one of claims 1-4, wherein, The lens antenna includes multiple bridges, and the total number of the multiple lens elements is twice the total number of the multiple bridges; The two elements connected to the bridge are arranged adjacent to each other, or an element connected to the bridge is arranged between the two elements connected to the bridge.
6. The lens antenna according to any one of claims 1-5, wherein, The bridge includes a broadband bridge and a frequency-selective bridge.
7. The lens antenna according to any one of claims 1-6, wherein, The electromagnetic wave lens includes a Luneburg lens.
8. The lens antenna as described in claim 7, wherein, The Luneburg lens includes: Any one of the following: spherical Luneburg lens, cylindrical Luneburg lens, and planar Luneburg lens.
9. The lens antenna according to any one of claims 1-8, wherein, The plurality of lens units are arranged along a first direction, which is a vertical direction.
10. A communication device, wherein, Including the lens antenna as described in any one of claims 1-9.