Leaky-wave antenna and communication equipment

Abstract

The invention discloses a leaky-wave antenna and communication equipment, and the leaky-wave antenna comprises at least one rectangular waveguide, and the surface of any rectangular waveguide is provided with a plurality of gaps. Each rectangular waveguide comprises a wide wall and a narrow wall which are parallel to the first direction, the gaps in the same rectangular waveguide are located in the same narrow wall, and the gaps in the same rectangular waveguide are arranged in the first direction; wherein the first direction is the propagation direction of electromagnetic waves in the rectangular waveguide. Therefore, the slot in the rectangular waveguide is arranged on the narrow wall, when electromagnetic waves are propagated in the cavity of the rectangular waveguide along the first direction, the electromagnetic waves can be emitted to a specific direction from the slot in the narrow wall, or when external electromagnetic waves pass through the rectangular waveguide, the electromagnetic waves in the specific direction can be received, so that the leaky-wave antenna is obtained. According to the leaky-wave antenna, the distance between adjacent rectangular waveguides can be more flexibly controlled, so that the distance between gaps in different rectangular waveguides is controlled, and the radiation performance of the leaky-wave antenna can be conveniently regulated and controlled.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a leaky-wave antenna and communication equipment. Background Art

[0002] Antennas are an essential and important structure in most communication devices, and their performance is crucial to the overall performance of the communication equipment. As a type of antenna, leaky wave antennas form a directional radiation beam by "leaking" or radiating a portion of the energy into free space when the electromagnetic waves propagate along a waveguide structure (such as a rectangular waveguide, microstrip line, substrate integrated waveguide, etc.). Leaky wave antennas, with their unique frequency scanning characteristics, high directivity, and planar integration potential, have important application value in microwave, millimeter wave, and even terahertz frequency bands. Therefore, how to improve the performance of leaky wave antennas has become a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0003] Embodiments of the present invention provide a leaky-wave antenna and a communication device, for improving the operating performance of the leaky-wave antenna.

[0004] In a first aspect, an embodiment of the present invention provides a leaky wave antenna, comprising: at least one rectangular waveguide, wherein a surface of any of the rectangular waveguides is provided with a plurality of slots;

[0005] The rectangular waveguide includes a wide wall and a narrow wall parallel to a first direction, the slots in the same rectangular waveguide are located on the same narrow wall, and the slots in the same rectangular waveguide are arranged along the first direction; wherein the first direction is the propagation direction of the electromagnetic wave in the rectangular waveguide.

[0006] In a second aspect, an embodiment of the present invention provides a communication device, including: a power supply, and a leaky wave antenna as described in the first aspect above, electrically connected to the power supply.

[0007] The beneficial effects of the present invention are as follows:

[0008] An embodiment of the present invention provides a leaky wave antenna and communication device, comprising at least one rectangular waveguide, wherein a plurality of slots are provided on the surface of any rectangular waveguide; the rectangular waveguide comprises a wide wall and a narrow wall parallel to a first direction, the slots in the same rectangular waveguide are located on the same narrow wall, and the slots in the same rectangular waveguide are arranged along the first direction; wherein the first direction is the propagation direction of the electromagnetic wave in the rectangular waveguide. Thus, by setting the slots in the rectangular waveguide on the narrow wall, when the electromagnetic wave propagates along the first direction in the cavity of the rectangular waveguide, the electromagnetic wave will be emitted from the slots on the narrow wall in a specific direction, or when the external electromagnetic wave passes through the rectangular waveguide, the electromagnetic wave in a specific direction will couple with the rectangular waveguide with the slots in the narrow wall, thereby achieving reception of the electromagnetic wave in the specific direction, thereby obtaining a leaky wave antenna. In addition, the leaky wave antenna can be provided with multiple rectangular waveguides, and since the slots are located in the narrow wall of the rectangular waveguide, the spacing between adjacent rectangular waveguides can be more flexibly controlled, thereby controlling the spacing of the slots in different rectangular waveguides, thereby facilitating the regulation of the radiation performance (including receiving performance and transmitting performance) of the leaky wave antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A front view and a top view of a first leaky-wave antenna provided in an embodiment of the present invention;

[0010] Figure 2 A schematic structural diagram of a rectangular waveguide provided in an embodiment of the present invention;

[0011] Figure 3 A schematic structural diagram of a second leaky-wave antenna provided in an embodiment of the present invention;

[0012] Figure 4 A schematic diagram of a leaky wave antenna configuration according to an embodiment of the present invention;

[0013] Figure 5 A schematic structural diagram of a third leaky-wave antenna provided in an embodiment of the present invention;

[0014] Figure 6 A schematic structural diagram of a control unit provided in an embodiment of the present invention;

[0015] Figure 7 A schematic structural diagram of a fourth leaky-wave antenna provided in an embodiment of the present invention;

[0016] Figure 8 A directional pattern of a leaky wave antenna provided in an embodiment of the present invention;

[0017] Figure 9 An axial ratio diagram of a leaky-wave antenna provided in an embodiment of the present invention;

[0018] Figure 10A directional pattern of another leaky-wave antenna provided in an embodiment of the present invention;

[0019] Figure 11 A schematic structural diagram of a communication device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following, in conjunction with the accompanying drawings, describes in detail the specific implementations of a leaky wave antenna and communication device provided by embodiments of the present invention. It should be noted that the described embodiments are only a portion of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0021] The embodiment of the present invention provides a leaky wave antenna, such as Figure 1 As shown, it includes: at least one rectangular waveguide 100, and a plurality of slots 110 are provided on the surface of any rectangular waveguide 100;

[0022] The rectangular waveguide 100 includes a wide wall 120 and a narrow wall 130 parallel to a first direction F1. The slots 110 in the same rectangular waveguide 100 are located on the same narrow wall 130, and the slots 110 in the same rectangular waveguide 100 are arranged along the first direction F1; wherein the first direction F1 is the propagation direction of electromagnetic waves in the rectangular waveguide 100.

[0023] In this way, by setting the slots in the rectangular waveguide on the narrow wall, when the electromagnetic wave propagates in a first direction within the cavity of the rectangular waveguide, the electromagnetic wave will be emitted from the slots in the narrow wall in a specific direction. Alternatively, when the external electromagnetic wave passes through the rectangular waveguide, the electromagnetic wave in the specific direction will couple with the rectangular waveguide with the slots in the narrow wall, thereby receiving the electromagnetic wave in the specific direction, thereby obtaining a leaky wave antenna. In addition, the leaky wave antenna can be provided with multiple rectangular waveguides, and because the slots are located in the narrow walls of the rectangular waveguides, the spacing between adjacent rectangular waveguides can be more flexibly controlled, thereby controlling the spacing of the slots in different rectangular waveguides, facilitating the regulation of the radiation performance (including reception and transmission performance) of the leaky wave antenna.

[0024] Among them, Figure 1 As shown, Figure 1 The rectangular waveguide 100 shown in the upper middle portion is a view from the side of the wide wall 120 of the rectangular waveguide 100. Figure 1The rectangular waveguide 100 shown in the lower center is a view from the side of the narrow wall 130 of the rectangular waveguide 100. The rectangular waveguide 100 is a rectangular parallelepiped and has a long length along the first direction F1, forming a columnar shape. The cross-section perpendicular to the first direction F1 is rectangular. Therefore, the sidewalls parallel to the first direction F1 have sidewalls with larger areas and sidewalls with smaller areas. The wide wall 120 can be understood as the sidewall with larger area among the sidewalls parallel to the first direction F1, and the narrow wall 130 can be understood as the sidewall with smaller area among the sidewalls parallel to the first direction F1.

[0025] Furthermore, in order to clearly illustrate the structure of the rectangular waveguide, as shown in FIG. Figure 2 As shown, Figure 2 Figure 1 is a schematic diagram of the three-dimensional structure of a rectangular waveguide. Wide walls 120 are sidewalls parallel to the xy plane, narrow walls 130 are sidewalls parallel to the yz plane, and multiple slots 110 are located on narrow walls 130. Furthermore, a cavity 140 is provided within rectangular waveguide 100 to facilitate electromagnetic wave propagation within cavity 140. Cavity 140 can also be filled with a medium, such as polytetrafluoroethylene, ceramic, or glass, to adjust the rectangular waveguide's propagation characteristics, loss, operating frequency, power capacity, and other properties. The specific filling medium is not limited herein.

[0026] Alternatively, as Figure 1 As shown, the angle A between the extension direction of the slot 110 in the rectangular waveguide 100 and the first direction F1 is greater than zero degrees. The extension direction of the slot 110 is the direction indicated by the dashed line L1. Thus, by tilting the slot 110 on the narrow wall 130, the slot 110 can simultaneously couple the transverse electric field component and the longitudinal current component, thereby radiating two mutually orthogonal radiation components. Furthermore, by designing the length, position, and tilt of the slot 110, the amplitude ratio and phase difference of the two orthogonal radiation components can be controlled, thereby realizing leaky wave antennas with various polarizations, such as linear polarization and circular polarization.

[0027] Alternatively, as Figure 3 As shown, the leaky wave antenna includes at least one group of rectangular waveguides 100, each group of rectangular waveguides 100 includes two rectangular waveguides 100 arranged side by side, the narrow walls 130 with gaps 110 in the same group of rectangular waveguides 100 face the same side, and the gaps 130 in the two rectangular waveguides 100 in the same group are arranged in a one-to-one correspondence.

[0028] Among them, the two rectangular waveguides arranged side by side in the same group can be respectively referred to as the first rectangular waveguide and the second rectangular waveguide. Figure 3 The rectangular waveguide 100 located at the top is a first rectangular waveguide 101 , and the rectangular waveguide 100 located at the bottom is a second rectangular waveguide 102 . The first rectangular waveguide 101 and the second rectangular waveguide 102 are arranged side by side.

[0029] In this way, by arranging two rectangular waveguides side by side in a group, when one rectangular waveguide in a group is excited alone, a linearly polarized antenna, such as a 45° polarized antenna or a -45° polarized antenna, can be realized. When two rectangular waveguides in a group are excited at the same time, a circularly polarized antenna or an elliptically polarized antenna can be realized. Moreover, since the gap is located in the narrow wall, the spacing between the two rectangular waveguides in a group can be flexibly adjusted, thereby adjusting the spacing between the gaps in the two rectangular waveguides in a group of rectangular waveguides, thereby obtaining a circularly polarized antenna with excellent axial ratio performance, thereby improving the design flexibility of the leaky wave antenna.

[0030] Specifically, if Figure 4 As shown, generally speaking, the position of the maximum electric field on the narrow wall 130 is the position of the center line L2 parallel to the first direction F1. Therefore, in order to obtain a higher radiation intensity, the slot 110 in the narrow wall 130 extends from the center line L2 to the edges on both sides. Therefore, the spacing between the slots 110 in two rectangular waveguides 100 in a group of rectangular waveguides 100 is equal to the distance d1 between the two center lines L2. Therefore, by controlling the size of the distance d1 between the center lines L2, the spacing between the slots in two rectangular waveguides in a group of rectangular waveguides can be adjusted. The distance d1 between the center lines L2 is generally greater than 0.15 times the operating wavelength and less than 1 times the operating wavelength. For example, Figure 4 As shown in (a), two rectangular waveguides 100 in a group can be in contact, so that the distance d1 between the center lines L2 is equal to the width of the narrow wall 130. Since the width of the narrow wall 130 is small, the distance d1 between the center lines L2 can be smaller, or as shown in FIG. Figure 4 As shown in (b), the two rectangular waveguides 100 in a group can be separated from each other, thereby increasing the distance d1 between the center lines L2. This allows for flexible control of the spacing between the slots within the two rectangular waveguides in a group, improving the design flexibility of leaky wave antennas.

[0031] Of course, multiple groups of rectangular waveguides can also be set up in a leaky wave antenna to achieve higher radiation intensity, a larger signal receiving area, and improve the radiation performance of the leaky wave antenna; and the orientation of the narrow walls where each group of gaps in the multiple groups of rectangular waveguides are located can be different, thereby realizing transmission and reception in all directions, further improving the radiation performance of the leaky wave antenna.

[0032] Furthermore, if Figure 4 As shown, the extending directions of the slots 110 in the two rectangular waveguides 100 in the same group intersect each other, and the extending directions of the slots 110 in the two rectangular waveguides 100 in the same group have the same angle with the first direction F1. Figure 4As shown in (b), the extension direction of the slot 110 in the first rectangular waveguide 101 is the direction indicated by the dotted line L3, and the extension direction of the slot 110 in the second rectangular waveguide 102 is the direction indicated by the dotted line L4. The dotted line L3 and the dotted line L4 intersect with each other, and the angle between the dotted line L3 and the first direction F1 is B1. The angle between the dotted line L4 and the first direction F1 is B2, and the angle B1 is equal to the angle B2.

[0033] In this way, by controlling the extension direction of the slots in a group of rectangular waveguides, the symmetry of the slots in the two rectangular waveguides is improved. When the leaky wave antenna is a circularly polarized antenna, the axial ratio of the circularly polarized antenna can be reduced, thereby improving the radiation performance of the leaky wave antenna.

[0034] Alternatively, as Figure 3 As shown, the leaky-wave antenna further includes a phase shifter 200 and a power splitter 300. The phase shifters 200 are provided in a one-to-one correspondence with the rectangular waveguides 100. The output ends of the phase shifters 200 are connected to the input ends of the rectangular waveguides 100. The input ends of the phase shifters 200 connected to the same group of rectangular waveguides 100 are respectively connected to the output ends of the same power splitter 300. The phase shifters 200 include, but are not limited to, waveguide phase shifters, coaxial phase shifters, microstrip lines, and other devices.

[0035] In this way, by setting up a power splitter unit, the power of one RF signal can be equally or unequally distributed to each output end, thereby providing an excitation signal for each rectangular waveguide. By setting up a phase shifter unit, the phase of the RF signal output by the power splitter unit can be controlled, thereby providing each rectangular waveguide with excitation signals of various phases, thereby realizing beam and polarization control of the leaky wave antenna.

[0036] Furthermore, the output power of each output end of the power splitter unit is the same. This allows for balancing the excitation signals between multiple rectangular waveguides, and when the leaky-wave antenna is used as a circularly polarized antenna, the axial ratio of the circularly polarized antenna can be reduced, thereby improving the radiation performance of the circularly polarized antenna.

[0037] In addition, when rectangular waveguides are arranged in groups, such as Figure 3 As shown, a power splitter unit 300 can be connected to a group of rectangular waveguides 100, so that power distribution between two rectangular waveguides 100 in a group can be achieved. For example, the power splitter unit 300 can equally divide the output power, so that the excitation signals of the two rectangular waveguides 100 are the same in size, and a circularly polarized antenna with excellent axial ratio performance can be achieved; or, a power splitter unit can be connected to two or more groups of rectangular waveguides, thereby reducing the number of power splitter units set and reducing the structural complexity of the leaky wave antenna.

[0038] Alternatively, as Figure 3As shown, the spacing d2 between two corresponding slots 110 in the same set of rectangular waveguides 100 along the first direction F1 is greater than zero, and / or the phase difference between the excitation sources of the same set of rectangular waveguides 100 is not equal to zero. The spacing d2 between the two corresponding slots 110 along the first direction F1 can be understood as follows: the slots 110 in the two rectangular waveguides 100 are staggered, and the staggered distance is the spacing d2 between the two corresponding slots 110 along the first direction F1.

[0039] It should be understood that when the spacing between the two corresponding slots in the same group of rectangular waveguides along the first direction is set larger, the phase difference of the excitation sources of the same group of rectangular waveguides can be set smaller, or even the phase difference of the excitation sources of the same group of rectangular waveguides can be set to zero; when the phase difference of the excitation sources in the same group of rectangular waveguides is set larger, the spacing between the two corresponding slots in the same group of rectangular waveguides along the first direction can be set smaller, or even the spacing between the two corresponding slots in the same group of rectangular waveguides along the first direction can be set to zero.

[0040] Optionally, the slot arrangement is determined based on the interference pattern of holographic theory. By adopting holographic theory and using the electromagnetic wave interference algorithm in holographic theory to determine the slot arrangement, the leaky-wave antenna can also be called a holographic antenna. Holographic antennas have a simple structure, low cost, a thin profile, and can achieve real-time, dynamic beam reconstruction.

[0041] Of course, the slots on the rectangular waveguide can also be arranged in a standing wave array, traveling wave array, etc. Correspondingly, the ends of the rectangular waveguide also need to be provided with structures for reflecting and absorbing electromagnetic waves. The arrangement of the slots on the rectangular waveguide is not specifically limited here.

[0042] Alternatively, as Figure 5 As shown, the slots 110 in the rectangular waveguide 100 are evenly arranged, and the leaky wave antenna further includes a control unit ( Figure 5 (not shown), the control unit is set in a one-to-one correspondence with the gap 110, and the control unit is used to regulate the electromagnetic waves emitted by the corresponding gap 110.

[0043] The control unit includes, but is not limited to, a liquid crystal control structure, a PIN diode, a varactor diode, or a MEMS (Micro-Electro-Mechanical Systems) switch.

[0044] Take the control unit as a liquid crystal control structure as an example, Figure 6 As shown, Figure 6 is a cross-sectional view obtained along a cutting plane perpendicular to the gap 110 at the gap 110, and Figure 6Only one slit 110 is shown in the figure. The liquid crystal control structure includes a first electrode 401, a second electrode 402, and a liquid crystal layer 403 located between the first electrode 401 and the second electrode 402. The slit 110 is located in the first electrode 401. A substrate 404 is further provided on the side of the second electrode 402 facing away from the first electrode 401. The second electrode 402 is provided on the substrate 404. The second electrode 402 is provided corresponding to the slit 110, and the orthographic projection of the second electrode 402 on the first electrode 401 covers the corresponding slit 110. The corresponding gap 110 is formed, so that when the leaky wave antenna transmits electromagnetic waves, the electromagnetic waves in the cavity 140 propagate from the gap 110 to the liquid crystal layer 403. The propagation of the electromagnetic waves in the liquid crystal layer 403 is controlled by the deflection state of the liquid crystal in the liquid crystal layer 403. Therefore, by controlling the voltage applied by the first electrode 401 and the second electrode 402, the propagation of the electromagnetic waves in the liquid crystal layer can be controlled, such as blocking the propagation of the electromagnetic waves or controlling the radiation intensity of the electromagnetic waves. That is, the liquid crystal regulation structure realizes the control of the electromagnetic waves emitted from the gap 110.

[0045] Of course, when the control unit is other types of control units such as a PIN diode, a varactor diode or a MEMS switch, the emission of electromagnetic waves at the gap can also be controlled by setting a control unit at the gap, which will not be described in detail here.

[0046] In this way, by setting up control units corresponding one-to-one to the slots in the leaky wave antenna, for a single slot, the switching and radiation intensity of the slot can be controlled. For the entire leaky wave antenna, the beam and polarization can be dynamically adjusted by adjusting the radiation intensity of each slot, thereby achieving more flexible leaky wave antenna control.

[0047] It should be understood that the selection of the rectangular waveguide size needs to meet the requirements of the operating frequency and single-mode transmission, and needs to comprehensively consider factors such as loss, power capacity, mechanical strength, cost, and specific application scenarios. On this basis, the distribution of the gaps can be further determined to achieve the required beam and polarization. For example, when using holographic theory to determine the gap distribution, the inner diameter of the rectangular waveguide can be 13.7mm×3mm, the length and width of the gap can be 6mm×0.5mm, the depth of the gap can be 1.85mm, and the spacing of the gaps can be 4.4mm, thereby obtaining a leaky wave antenna with an operating frequency of 12.2GHz.

[0048] Of course, in addition to setting the gap in the narrow wall, such as Figure 7 As shown, the slots 110 may also be located on the wide wall 120. In this case, two rows of slots 110 may be provided on one wide wall 120, and the two rows of slots 110 are respectively located on both sides of the center line L2 parallel to the first direction F1. By controlling the relative position between the two rows of slots 110, a circularly polarized antenna can also be realized.

[0049] The leaky wave antenna provided by the embodiment of the present invention is explained below with reference to specific embodiments.

[0050] like Figure 8 As shown, Figure 8 for Figure 1 The leaky wave antenna shown uses holographic theory to determine the directivity of the slot arrangement. Figure 8 The horizontal axis is the angle of the radiation direction of the leaky wave antenna. The radiation direction with an angle of 90° is perpendicular to the narrow wall. The vertical axis normalized gain is the attenuation degree of radiation at different angles relative to 90°. The operating frequency is 12.2GHz. Figure 8 As can be seen in the figure, the beam width of the main lobe is narrow, which concentrates the radiation energy in a smaller angle range, thereby obtaining a better normal beam (beam perpendicular to the narrow wall direction), facilitating the radiation direction control of the leaky wave antenna and improving the directional radiation performance of the leaky wave antenna.

[0051] like Figure 9 As shown, Figure 9 for Figure 3 The axial ratio diagram of the leaky wave antenna shown in the figure is determined by holographic theory when the slots are arranged in the direction of phi = 0° and pheta = 0°. The direction represented by phi = 0° and pheta = 0° is the normal direction of the leaky wave antenna. Figure 9 The horizontal axis is the radiation frequency of the leaky wave antenna, and the vertical axis is the axial ratio of different radiation frequencies. Figure 9 It can be seen from the figure that at the operating frequency of 12.2 GHz, the axial ratio is about 1.05 dB, so Figure 3 The circularly polarized antenna implemented by the leaky wave antenna of the structure shown has better axial ratio performance, thereby improving the practicality of the leaky wave antenna.

[0052] like Figure 10 As shown, Figure 10 for Figure 3 The leaky wave antenna shown uses holographic theory to determine the directivity of the slot arrangement. Figure 10 The horizontal axis is the angle of the radiation direction of the leaky wave antenna. The radiation direction with an angle of 90° is perpendicular to the narrow wall. The vertical axis normalized gain is the attenuation degree of radiation at different angles relative to 90°. The operating frequency is 12.2GHz. Figure 10 As can be seen in the Figure 3 When the leaky wave antenna of the structure shown is implemented as a circularly polarized antenna, a main lobe with a narrow beam width can still be obtained, so that the radiation energy of the circularly polarized electromagnetic wave is concentrated within a smaller angle range, thereby obtaining a better normal beam, facilitating the radiation direction control of the circularly polarized antenna, and further improving the practicality of the leaky wave antenna.

[0053] Based on the same inventive concept, an embodiment of the present invention also provides a communication device, the implementation principle of which is similar to that of the aforementioned leaky wave antenna. The specific implementation method of the communication device can be found in the embodiment of the aforementioned leaky wave antenna, and the repeated parts will not be repeated.

[0054] Specifically, an embodiment of the present invention provides a communication device, such as Figure 11 As shown, it includes: a power supply 1101 and the leaky wave antenna 1102 described above electrically connected to the power supply 1101. The communication equipment includes but is not limited to: high-speed mobile communication equipment, radio frequency identification equipment, millimeter wave communication equipment, satellite communication terminals, radars and other communication equipment.

[0055] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A leaky wave antenna, characterized in that include: at least one rectangular waveguide, wherein a plurality of slots are provided on a surface of any of the rectangular waveguides; The rectangular waveguide includes a wide wall and a narrow wall parallel to a first direction, the slots in the same rectangular waveguide are located on the same narrow wall, and the slots in the same rectangular waveguide are arranged along the first direction; wherein the first direction is the propagation direction of the electromagnetic wave in the rectangular waveguide.

2. The leaky wave antenna according to claim 1, wherein An angle between an extension direction of the slot in the rectangular waveguide and the first direction is greater than zero degrees.

3. The leaky wave antenna according to claim 2, wherein The leaky wave antenna includes at least one group of rectangular waveguides, each group of rectangular waveguides includes two rectangular waveguides arranged side by side, the narrow walls of the rectangular waveguides in the same group with the slots face the same side, and the slots in the two rectangular waveguides in the same group are arranged in a one-to-one correspondence.

4. The leaky wave antenna according to claim 3, wherein The extending directions of the slots in the two rectangular waveguides in the same group intersect with each other, and the extending directions of the slots in the two rectangular waveguides in the same group form the same angle with the first direction.

5. The leaky wave antenna according to claim 3, wherein The leaky wave antenna further includes: a phase shifting unit and a power splitter unit. The phase shifting unit is arranged in a one-to-one correspondence with the rectangular waveguide, the output end of the phase shifting unit is connected to the input end of the rectangular waveguide, and the input end of each phase shifting unit connected to the same group of rectangular waveguides is respectively connected to each output end of the same power splitter unit.

6. The leaky wave antenna according to claim 5, wherein The output power of each output end of the power division unit is the same.

7. The leaky wave antenna according to any one of claims 3 to 6, wherein: The distance between two corresponding slots in the same group of rectangular waveguides along the first direction is greater than zero, and / or the phase difference of the excitation sources of the same group of rectangular waveguides is not equal to zero.

8. The leaky wave antenna according to claim 7, wherein The arrangement of the slits is determined based on the interference pattern of holographic theory.

9. The leaky wave antenna according to any one of claims 1 to 6, wherein: The slots in the rectangular waveguide are evenly arranged, and the leaky wave antenna further includes a control unit, which is arranged in a one-to-one correspondence with the slots, and is used to regulate the electromagnetic waves emitted from the corresponding slots.

10. A communication device, characterized in that: include: A power supply, and a leaky-wave antenna according to any one of claims 1 to 9 electrically connected to the power supply.

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