Millimeter wave broadband beam scanning antenna array

Abstract

The application provides a millimeter wave broadband beam scanning antenna array, comprising: a plurality of antenna array elements adopting half-mode millimeter wave broadband beam scanning antenna units, and an isolation component for isolating energy between the antenna array elements; the antenna array elements are sequentially and co-directionally fixed on one side panel of a metal medium group board, and the isolation component is arranged in the metal medium group board; a coaxial feeding unit is arranged on the other side panel of the metal medium group board. The application can effectively reduce the overall size of the antenna array elements, thereby improving the structural compactness of the millimeter wave broadband beam scanning antenna array; meanwhile, the energy between the antenna array elements can be effectively isolated, so that decoupling is realized, thereby effectively improving the wide-angle scanning performance of the millimeter wave broadband beam scanning antenna and improving the scanning range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, and in particular to a millimeter wave broadband beam scanning antenna array. BACKGROUND

[0002] With the continuous landing of the related applications of the 5th generation mobile networks (5G), it has become an industry consensus to apply 5G to the millimeter wave frequency band to utilize its rich spectrum resources to alleviate the pressure of low frequency congestion. However, the signal transmission of the millimeter wave frequency band often faces high loss, and at the same time, in outdoor communication, it is necessary to solve the problem of stable communication between a fixed point and a moving target, so the design of a broadband beam scanning antenna with high gain has great value in solving the above problems. The wavelength of the millimeter wave frequency band is shorter, so the overall size of the millimeter wave antenna is smaller, and there is often mutual coupling between the elements of the beam scanning antenna, which will affect the beam scanning performance of the antenna, so how to balance miniaturization and wide-angle scanning performance is a problem to be solved for millimeter wave beam scanning antennas. SUMMARY

[0003] In view of this, the embodiments of the present application provide a millimeter wave broadband beam scanning antenna array to eliminate or improve one or more defects in the prior art.

[0004] One aspect of the present application provides a millimeter wave broadband beam scanning antenna array, comprising: a plurality of antenna elements adopting a half-mode millimeter wave broadband beam scanning antenna unit, and an isolation component for isolating energy between each of the antenna elements.

[0005] Each of the antenna elements is sequentially and co-directionally fixed on one side panel of a metal dielectric group board, and the isolation component is arranged in the metal dielectric group board, and a coaxial feeding unit is arranged on the other side panel of the metal dielectric group board.

[0006] In some embodiments of the present application, the half-mode millimeter wave broadband beam scanning antenna unit is a half-mode Vivaldi antenna unit.

[0007] In some embodiments of the present application, the half-mode Vivaldi antenna unit comprises a half Vivaldi radiation wall and a vertical metal wall, wherein the half Vivaldi radiation wall is a component obtained by cutting from the center line of a Vivaldi antenna.

[0008] The bottom of the half Vivaldi radiation wall and the vertical metal wall are fixedly arranged on the metal dielectric group board, and a radiation gap is formed between the half Vivaldi radiation wall and the vertical metal wall.

[0009] In some embodiments of the present application, the metal medium group board comprises:

[0010] a medium substrate, a first metal plate arranged on one side of the medium substrate, and a second metal plate arranged on the other side of the medium substrate;

[0011] Each of the half Vivaldi radiation wall and the vertical metal wall is fixedly arranged on the first metal plate, and the coaxial feeding unit is fixedly arranged on the second metal plate, and an inner tube of the coaxial feeding unit extends and penetrates through the medium substrate.

[0012] In some embodiments of the present application, the isolation assembly comprises a plurality of columns of metal isolation units arranged in the medium substrate.

[0013] Each column of the metal isolation units is arranged corresponding to an edge of the half-mode Vivaldi antenna unit, wherein the edge of the half-mode Vivaldi antenna unit comprises a side edge of the bottom of the half Vivaldi radiation wall away from the vertical metal wall belonging to the same half-mode Vivaldi antenna unit, and a side edge of the bottom of the vertical metal wall away from the half Vivaldi radiation wall belonging to the same half-mode Vivaldi antenna unit.

[0014] In some embodiments of the present application, the metal isolation unit comprises a plurality of metal isolation through holes.

[0015] Each of the metal isolation through holes is formed in the metal medium group board and extends in a direction perpendicular to the plate surface of the metal medium group board.

[0016] In some embodiments of the present application, in two adjacent half-mode Vivaldi antenna units, the half Vivaldi radiation wall in one half-mode Vivaldi antenna unit and the vertical metal wall in the other half-mode Vivaldi antenna unit are fixedly connected.

[0017] In some embodiments of the present application, the half Vivaldi radiation wall in one half-mode Vivaldi antenna unit and the vertical metal wall in the other half-mode Vivaldi antenna unit are integrally formed as a 3D printed medium structure.

[0018] In some embodiments of the present application, an outer surface of the 3D printed medium structure is covered with a copper layer.

[0019] In some embodiments of the present application, the number of the half-mode Vivaldi antenna units is 4, and the number of columns of the metal isolation units is 5.

[0020] The millimeter wave broadband beam scanning antenna array provided in the application is miniaturized, a half-mode structure is designed for the array element in the antenna array based on the mirror theory, so that the overall size of the antenna element is reduced and the array structure is compact; due to the miniaturized design, the element spacing is reduced, which means that the mutual coupling between the elements is enhanced, which is not conducive to the performance of wide-angle scanning of the antenna array, so a single column of metal vias is loaded between the elements to effectively isolate the energy between the elements, thereby realizing decoupling and effectively improving the wide-angle scanning performance of the millimeter wave broadband beam scanning antenna.

[0021] Additional advantages, objects, and features of the application will be set forth in part in the description which follows, and will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and the appended drawings.

[0022] Those skilled in the art will understand that the objects and advantages of the application can be realized and attained by the application, and the above and other objects of the application will be more clearly understood from the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings described herein are intended to provide further understanding of the application and form a part of the application, and do not constitute a limitation of the application. The components in the drawings are not drawn to scale, but are intended to show the principles of the application. In order to show and describe some parts of the application, the corresponding parts in the drawings can be enlarged, that is, they can become larger than other components in the exemplary device actually manufactured according to the application. In the drawings:

[0024] Figure 1a A front view of a half-mode Vivaldi antenna element provided for an embodiment of the application.

[0025] Figure 1b A top view of a half-mode Vivaldi antenna element provided for an embodiment of the application.

[0026] Figure 2a A front view of a millimeter wave broadband beam scanning antenna array provided for an embodiment of the application.

[0027] Figure 2b A top view of a millimeter wave broadband beam scanning antenna array provided for an embodiment of the application.

[0028] Figure 3 A half-mode Vivaldi antenna element provided for an embodiment of the application is simulated in the frequency range of the antenna element.

[0029] Figure 4aA half-mode Vivaldi antenna unit provided by the embodiment of the application has a simulation radiation pattern of main polarization and cross polarization in the xoz plane at a frequency point of 27 GHz.

[0030] Figure 4b A half-mode Vivaldi antenna unit provided by the embodiment of the application has a simulation radiation pattern of main polarization and cross polarization in the yoz plane at a frequency point of 27 GHz.

[0031] Figure 5a A reflection coefficient simulation curve diagram of a millimeter wave broadband beam scanning antenna array provided by the embodiment of the application when no isolation metal via is loaded.

[0032] Figure 5b A reflection coefficient simulation curve diagram of a millimeter wave broadband beam scanning antenna array provided by the embodiment of the application when an isolation metal via is loaded.

[0033] Figure 6a An isolation simulation curve diagram of a millimeter wave broadband beam scanning antenna array provided by the embodiment of the application when no isolation metal via is loaded.

[0034] Figure 6b An isolation simulation curve diagram of a millimeter wave broadband beam scanning antenna array provided by the embodiment of the application when an isolation metal via is loaded.

[0035] Figure 7 A simulation peak gain comparison curve diagram of a millimeter wave broadband beam scanning antenna array provided by the embodiment of the application when unit is fed with the same phase, without loading a metal isolation via and with loading a metal isolation via.

[0036] Figure 8a A simulation radiation pattern of main polarization and cross polarization in the xoz plane at a frequency point of 28 GHz of a millimeter wave broadband beam scanning antenna array provided by the embodiment of the application when unit is fed with the same phase.

[0037] Figure 8b A simulation radiation pattern of main polarization and cross polarization in the yoz plane at a frequency point of 28 GHz of a millimeter wave broadband beam scanning antenna array provided by the embodiment of the application when unit is fed with the same phase.

[0038] Figure 9 A simulation beam scanning performance curve diagram of a millimeter wave broadband beam scanning antenna array provided by the embodiment of the application.

[0039] Figures:

[0040] 1, half Vivaldi radiation wall;

[0041] 2, vertical metal wall;

[0042] 3、first metal plate;

[0043] 4、dielectric substrate;

[0044] 5、second metal plate;

[0045] 6、coaxial feed unit;

[0046] 7、metal isolation via;

[0047] 8、radiating slot;

[0048] 9、metal isolation unit;

[0049] 10、3D printing medium structure. DETAILED DESCRIPTION

[0050] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail below with reference to the embodiments and drawings. Herein, the illustrative embodiments of the present application and their descriptions are used to explain the present application, but are not used as limitations to the present application.

[0051] It should also be noted that, in order to avoid the present application being obscured by unnecessary details, only structures and / or processing steps closely related to the solutions according to the present application are shown in the drawings, and other details not closely related to the present application are omitted.

[0052] It should be emphasized that the term "comprises / comprising" when used in this text means the presence of the stated features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0053] It should also be noted that, if not specifically stated, the term "connected" in this text can not only mean direct connection, but also mean indirect connection with the presence of an intermediate.

[0054] In the following, embodiments of the present application will be described with reference to the drawings. In the drawings, the same reference numerals represent the same or similar parts or the same or similar steps.

[0055] In one or more embodiments of the present application, the half Vivaldi radiating wall can also be referred to as: half of a Vivaldi radiating arm.

[0056] In one or more embodiments of the present application, the first metal plate can also be referred to as: top metal plate.

[0057] In one or more embodiments of the present application, the second metal plate can also be referred to as: metal ground plate.

[0058] In one or more embodiments of the present application, the coaxial feed unit can also be referred to as a coaxial feed structure.

[0059] In one or more embodiments of the present application, the half-mode Vivaldi antenna unit can also be referred to as a miniaturized millimeter wave half-mode Vivaldi antenna unit.

[0060] In one or more embodiments of the present application, the millimeter wave broadband beam scanning antenna array can also be referred to as a miniaturized millimeter wave broadband wide-angle scanning antenna array.

[0061] In order to balance the miniaturization and wide-angle scanning performance of the millimeter wave broadband beam scanning antenna array, referring to Figure 1a 、 Figure 1b 、 Figure 2a and Figure 2b , the present application provides a millimeter wave broadband beam scanning antenna array, specifically a miniaturized millimeter wave broadband wide-angle scanning antenna array, which specifically includes the following contents:

[0062] A plurality of antenna array elements using a half-mode millimeter wave broadband beam scanning antenna unit, and an isolation component for isolating energy between each of the antenna array elements; each of the antenna array elements is sequentially connected and fixed in the same direction on one side panel of a metal dielectric group board, and the isolation component is arranged in the metal dielectric group board, and a coaxial feed unit 6 is arranged on the other side panel of the metal dielectric group board.

[0063] In order to further optimize the half-mode millimeter wave broadband beam scanning antenna unit, in one embodiment of the present application, a half-mode Vivaldi antenna unit can be selected. The half-mode Vivaldi antenna unit includes a half Vivaldi radiation wall 1 and a vertical metal wall 2, wherein the half Vivaldi radiation wall 1 is a component obtained by cutting from the center line of the Vivaldi antenna; the bottom of the half Vivaldi radiation wall 1 and the vertical metal wall 2 are fixedly arranged on the metal dielectric group board; and a radiation gap 8 is formed between the half Vivaldi radiation wall 1 and the vertical metal wall 2.

[0064] Specifically, the Vivaldi antenna is a slot microstrip antenna that controls electromagnetic wave to radiate electromagnetic energy from one end of the slot to the open end by using an exponential-shaped slot structure. It is generally composed of three layers of materials:

[0065] (1) The top layer is a metal ground plate, and a slot structure surrounded by a slot line is dug on the ground plate. The slot line is composed of three parts: the first part is a circular slot line, which plays an impedance matching role for the microstrip transmission line; the second part is a rectangular slot line, which plays a role of mutual coupling transmission of electromagnetic waves with the microstrip transmission line; and the third part is a tapered slot line, which plays a role of guiding electromagnetic waves radiated by the antenna. The center line between the two tapered slot lines can be considered as the center line of the Vivaldi antenna, and the half Vivaldi radiation wall 1 mentioned in the application refers to a half component obtained by cutting the Vivaldi antenna at the center line of the Vivaldi antenna, and the component contains a tapered slot line.

[0066] (2) The middle layer is a dielectric plate.

[0067] (3) The bottom layer is a metal microstrip line, and the terminal of the microstrip line is a fan-shaped structure, which mainly plays a role of terminal load matching, and the convex part of the two fan-shaped structures can be considered as the center line of the Vivaldi antenna; the microstrip line is coupled and fed to the slot line through the dielectric plate.

[0068] In order to further improve the application reliability of the metal dielectric group plate, in an embodiment of the millimeter wave wideband beam scanning antenna array of the application, the metal dielectric group plate can specifically include:

[0069] The dielectric substrate 4, the first metal plate 3 arranged on one side panel of the dielectric substrate 4, and the second metal plate 5 arranged on the other side panel of the dielectric substrate 4; each of the half Vivaldi radiation wall 1 and the vertical metal wall 2 is fixedly arranged on the first metal plate 3, and the coaxial feeding unit 6 is fixedly arranged on the second metal plate 5, and the inner tube of the coaxial feeding unit 6 extends and penetrates the dielectric substrate 4. It can be understood that the coaxial feeding unit 6 can be fixedly arranged on the center point of the second metal plate 5.

[0070] In order to further improve the application reliability of the isolation assembly, in an embodiment of the millimeter wave wideband beam scanning antenna array of the application, the isolation assembly can specifically include:

[0071] A plurality of columns of metal isolation units 9 arranged in the dielectric substrate 4; each column of the metal isolation units 9 is arranged corresponding to the edge of the half-mode Vivaldi antenna unit, wherein the edge of the half-mode Vivaldi antenna unit includes: the side edge of the bottom of the half Vivaldi radiation wall 1 away from the vertical metal wall 2 belonging to the same half-mode Vivaldi antenna unit, and the side edge of the bottom of the vertical metal wall 2 away from the half Vivaldi radiation wall 1 belonging to the same half-mode Vivaldi antenna unit.

[0072] In order to further improve the application reliability of the metal isolation unit, in an embodiment of the millimeter wave broadband beam scanning antenna array of the present application, the metal isolation unit can specifically include:

[0073] A plurality of metal isolation through holes 7; each of the metal isolation through holes 7 is formed in the metal dielectric group plate and extends in the direction perpendicular to the plate surface of the metal dielectric group plate.

[0074] In order to further improve the application reliability of the half-mode Vivaldi antenna unit, in an embodiment of the millimeter wave broadband beam scanning antenna array of the present application, in the two adjacent half-mode Vivaldi antenna units, the half Vivaldi radiation wall 1 in one of the half-mode Vivaldi antenna units is fixedly connected with the vertical metal wall 2 in the other half-mode Vivaldi antenna unit.

[0075] Among them, the half Vivaldi radiation wall 1 in one of the half-mode Vivaldi antenna units and the vertical metal wall 2 in the other half-mode Vivaldi antenna unit are integrally formed 3D printing medium structures 10. The outer surface of the 3D printing medium structure 10 is covered with a copper layer.

[0076] In order to further improve the communication performance of fixed-point and mobile terminals in millimeter wave outdoor communication, in an embodiment of the millimeter wave broadband beam scanning antenna array of the present application, the number of half-mode Vivaldi antenna units is 4, and the number of columns of the metal isolation unit 9 is 5. That is, in this embodiment, the millimeter wave broadband beam scanning antenna array includes four half-mode Vivaldi antenna unit structures, each half-mode Vivaldi antenna unit includes a half Vivaldi radiation wall and a vertical metal wall structure, the antenna unit is placed on a dielectric substrate and is fed by a coaxial, and the specific structure of the millimeter wave broadband beam scanning antenna array includes: a half Vivaldi radiation wall 1, a vertical metal wall 2, a first metal plate 3, a dielectric substrate 4, a second metal plate 5, a coaxial feeding unit 6, a metal isolation through hole 7, and a radiation slot 8. Each array element is composed of a half Vivaldi radiation wall 1 and a vertical metal wall 2. There are five columns of metal isolation through holes 7 in the dielectric substrate 4 for energy decoupling between array elements. There are four radiation slots 8 in the first metal plate 3 for coupling energy to the half-mode Vivaldi antenna.

[0077] Among them, the half Vivaldi radiation wall 1 and the vertical metal wall 2 structure are 3D printing medium structures 10 and the overall outer surface is copperized to form a copper layer, and the half Vivaldi radiation wall 1 and the vertical metal wall 2 structure in the non-edge area can be integrally processed.

[0078] The millimeter wave broadband beam scanning antenna array provided by the embodiment of the application has a wideband characteristic as a traveling wave antenna, and the antenna is further designed based on the structure. In order to realize miniaturization, a half-mode structure is designed based on the mirror theory, so that the overall size of the array element is reduced and the array structure is compact. Due to the miniaturization design, the array element spacing is reduced, which means that the mutual coupling effect between the array elements is enhanced, which is not conducive to the performance of wide-angle scanning of the antenna array. Therefore, a single column of metal through holes is loaded between the array elements to effectively isolate the energy between the array elements, so as to realize decoupling and improve the wide-angle scanning performance of the antenna.

[0079] In a specific example of the application, the width of the half Vivaldi radiation wall 1 is 2 mm, the height is 5.4 mm, and the thickness is 5 mm.

[0080] In a specific example of the application, the width of the vertical metal wall 2 is 2 mm, the height is 5.4 mm, and the thickness is 5 mm.

[0081] In a specific example of the application, the size of the first metal plate 3 and the second metal plate 5 is 22 mm x 5.1 mm x 0.787 mm. The dielectric substrate 4 is Rogers plate material, model 5880, size 22 mm x 5.1 mm x 0.787 mm.

[0082] In a specific example of the application, the diameter of the metal isolation through hole 7 is 0.5 mm, and the through hole spacing is 0.71 mm.

[0083] In a specific example of the application, the width of the radiation slot 8 is 1 mm.

[0084] The working process of the millimeter wave broadband beam scanning antenna array provided by the embodiment of the application is as follows:

[0085] The four array elements in the coaxial pair antenna array are fed, the energy is fed into the dielectric substrate and radiated from the slot, and then radiated to the free space along the half-mode Vivaldi structure. By changing the phase difference of the fed array elements, the control of the beam pointing can be realized, so as to realize the performance of wide-angle beam scanning.

[0086] Optionally, the impedance matching bandwidth of the millimeter wave broadband beam scanning antenna array provided by the embodiment of the application is 26-34 GHz (Giga Hertz, GHz), which covers the fifth generation mobile network (5th generation mobile networks, 5G) communication frequency band, and can be used as a millimeter wave outdoor communication antenna.

[0087] Referring to Figure 3A reflection coefficient and peak gain simulation curve of a half-mode Vivaldi antenna unit provided by the embodiment of the application in a working frequency band range is shown in FIG. 1. In the figure, the horizontal axis represents the frequency of an input signal, and the vertical axis represents the reflection coefficient on the left and the peak gain on the right. The reflection coefficient represents whether the antenna achieves impedance matching, and a general requirement is that the reflection coefficient is lower than -10 dB, which meets the design requirement. As shown in FIG. 1, the antenna unit works in the range of 25.9-33.9 GHz, and the peak gain can reach 7.04 dBi. Figure 3 As shown in FIG. 1, the antenna unit works in the range of 25.9-33.9 GHz, and the peak gain can reach 7.04 dBi.

[0088] Referring to FIG. 2, Figure 4a and Figure 4b A main polarization and cross polarization simulation radiation pattern of a half-mode Vivaldi antenna unit provided by the embodiment of the application in the xoz plane and the yoz plane at a frequency of 27 GHz is shown in FIG. 2. Due to the asymmetry of the half-mode Vivaldi structure, the radiation pattern in the xoz plane has a certain deflection, and the deflection angle in the xoz plane at a frequency of 27 GHz is 6 degrees. For subsequent array implementation of the beam scanning function, the gain stability in the scanning angle range can be ensured.

[0089] Referring to FIG. 3, Figure 5a and Figure 5b Reflection coefficient simulation diagrams of different array elements in a working frequency band range when a millimeter wave broadband beam scanning antenna array is not loaded and loaded with metal isolation through holes are shown in FIG. 3. In the figure, the horizontal axis represents the frequency of an input signal, and the vertical axis represents the reflection coefficient. The curve with squares represents S11, the curve with triangles represents S22, the curve with circles represents S33, and the curve with inverted triangles represents S44. S11 represents the reflection coefficient of the first antenna unit, S22 represents the reflection coefficient of the second antenna unit, S33 represents the reflection coefficient of the third antenna unit, and S44 represents the reflection coefficient of the fourth antenna unit. The reflection coefficient represents whether the antenna achieves impedance matching, and a general requirement is that the reflection coefficient is lower than -10 dB, which meets the design requirement. As shown in FIG. 3, when the metal isolation through holes are not loaded, the impedance matching performance of the four array elements is not consistent, and the working frequency band of the first three array elements is extremely narrow, and the fourth array element does not have the impedance matching characteristic. Figure 5b As shown in FIG. 3, when the metal isolation through holes are loaded, the four reflection coefficients of the antenna are all lower than -10 dB in the range of 26-34 GHz, and the impedance matching bandwidth is 26.67%, which indicates that the antenna has good wideband performance.

[0090] Referring to FIG. 4, Figure 6a and Figure 6b, respectively, are simulation diagrams of the isolation between elements of the millimeter wave broadband beam scanning antenna array without loading and loading metal isolation through holes in the working frequency band range. Among them, the horizontal axis represents the frequency of the input signal, the vertical axis represents the isolation, the curve with a square is S12, the curve with a triangle is S13, the curve with an inverted triangle is S14, the curve with a circle is S23, the curve with a diamond is S24, and the curve with a pentagon is S34. S12 represents the isolation between the first antenna element and the second antenna element, S13 represents the isolation between the first antenna element and the third antenna element, S14 represents the isolation between the first antenna element and the fourth antenna element, S23 represents the isolation between the second antenna element and the third antenna element, S24 represents the isolation between the second antenna element and the third antenna element, and S34 represents the isolation between the third antenna element and the fourth antenna element. Generally, it is required to be lower than -15dB to meet the design requirements.

[0091] As can be seen, without loading metal isolation through holes, the isolation between different ports shows great difference, and the isolation between adjacent ports is about 8dB, so the mutual coupling effect is very strong, which affects the beam scanning performance of the antenna. After loading metal isolation through holes, the isolation between each antenna element of the antenna is lower than -15dB within the impedance matching bandwidth of 26-34GHz, meeting the design requirements of antenna isolation, indicating that the mutual coupling effect between antenna elements is very small, which is beneficial to the performance of wide-angle scanning of the antenna.

[0092] Referring to Figure 7 , Figure 7 is a simulation diagram of the peak gain of the millimeter wave broadband beam scanning antenna array in the working frequency band range, wherein the horizontal axis represents the frequency of the input signal, and the vertical axis represents the peak gain. Figure 7 As can be seen, the maximum gain of the antenna can reach 12.2dBi within the range of 26-34GHz, indicating that the antenna has high gain characteristics.

[0093] Figure 8a and Figure 8b are simulation results of the radiation patterns of the XOZ plane and the YOZ plane of the millimeter wave broadband beam scanning antenna array when the elements are fed in phase at 28GHz. The radiation patterns have good symmetry.

[0094] Figure 9 is a simulation beam scanning performance curve diagram of the millimeter wave broadband beam scanning antenna array. The scanning angle of the antenna array can cover -51 degrees to 47 degrees, realizing wide-angle scanning performance. Within the scanning range, the gain fluctuation is lower than 0.96dB, which has very high stability.

[0095] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The embodiments of the present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A millimeter wave wideband beam scanning antenna array, characterized in that, include: Multiple antenna elements employing half-mode millimeter-wave broadband beam scanning antenna elements, and an isolation component for isolating energy between the individual antenna elements; Each of the antenna array elements is sequentially connected and fixed in the same direction on one side panel of a metal dielectric assembly, and the isolation component is disposed in the metal dielectric assembly. A coaxial feed unit is provided on the other side panel of the metal dielectric assembly. The half-mode millimeter-wave broadband beam scanning antenna element is a half-mode Vivaldi antenna element. The half-mode Vivaldi antenna element includes: half a Vivaldi radiating wall and a vertical metal wall, wherein the half Vivaldi radiating wall is a component cut off from the centerline of the Vivaldi antenna; The bottom of both the half-Vivaldi radiating wall and the vertical metal wall are fixedly mounted on the metal dielectric assembly plate; and a radiating gap is formed between the half-Vivaldi radiating wall and the vertical metal wall. The metal dielectric assembly includes: A dielectric substrate, a first metal plate disposed on a side panel of the dielectric substrate, and a second metal plate disposed on a side panel of the dielectric substrate; Each of the aforementioned half-Vivaldi radiating walls and the aforementioned vertical metal wall are fixedly mounted on the first metal plate, and the coaxial feed unit is fixedly mounted on the second metal plate, with the inner tube of the coaxial feed unit extending through the dielectric substrate. The isolation assembly includes: multiple rows of metal isolation units disposed within the dielectric substrate; Each of the metal isolation units is respectively disposed corresponding to the edge of the half-mode Vivaldi antenna unit, wherein the edge of the half-mode Vivaldi antenna unit includes: the side edge of the bottom of the half Vivaldi radiating wall that is away from the vertical metal wall belonging to the same half-mode Vivaldi antenna unit, and the side edge of the bottom of the vertical metal wall that is away from the half Vivaldi radiating wall belonging to the same half-mode Vivaldi antenna unit.

2. The millimeter-wave wideband beam-scanning antenna array of claim 1, wherein, The metal isolation unit includes: a plurality of metal isolation through holes; Each of the aforementioned metal isolation vias is formed in the metal dielectric assembly and extends in a direction perpendicular to the surface of the metal dielectric assembly.

3. The mmWave wideband beam scanning antenna array of claim 1, wherein, In two adjacent half-mode Vivaldi antenna elements, the half of the Vivaldi radiating wall in one half-mode Vivaldi antenna element and the vertical metal wall in the other half-mode Vivaldi antenna element are fixedly connected.

4. The mmWave wideband beam scanning antenna array of claim 3, wherein, The half-Vivaldi radiating wall in one of the connected half-mode Vivaldi antenna units and the vertical metal wall in the other half-mode Vivaldi antenna unit are integrally formed 3D printed media structures.

5. The mmWave wideband beam scanning antenna array of claim 4, wherein, The outer surface of the 3D printed media structure is covered with a copper layer.

6. The mmWave wideband beam scanning antenna array of claim 1, wherein, The number of the half-mode Vivaldi antenna elements is 4, and the number of columns of the metal isolation elements is 5.

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