A microstrip series-fed array antenna and a vehicle-mounted millimeter-wave radar

Abstract

The present application discloses a microstrip series-fed array antenna and a vehicle-mounted millimeter-wave radar, relating to the field of millimeter-wave radars. The microstrip series-fed array antenna includes: an antenna, a dielectric substrate, and a metal ground; wherein: the dielectric substrate is disposed to cover the upper part of the metal ground; the antenna is disposed above the dielectric substrate and is used for forming a radiation pattern with vertical polarization and a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization. Thereby, the microstrip series-fed array antenna can generate radiation in two polarization modes, namely, the horizontal polarization mode and the vertical polarization mode, and can control the radiation patterns of both polarizations simultaneously.

Description

Technical Field

[0001] This application relates to the technical field of millimeter-wave radar, and particularly to a microstrip series-fed array antenna and a vehicle-mounted millimeter-wave radar. Background Art

[0002] The microstrip series-fed array antenna is the most commonly used antenna form in vehicle-mounted millimeter-wave radars. The polarization method of traditional conventional microstrip series-fed array antennas generally adopts single linear polarization and can only generate one polarization beam. Therefore, traditional conventional microstrip series-fed array antennas can only generate one polarization beam and can only control the pattern of a single polarization. However, in some application scenarios of vehicle-mounted millimeter-wave radars, a microstrip series-fed array antenna that can simultaneously generate radiation in two polarization modes and can simultaneously control the patterns of the two polarizations is required. Traditional conventional microstrip series-fed array antennas cannot meet the above requirements of vehicle-mounted millimeter-wave radars.

[0003] Therefore, there is an urgent need to propose a new microstrip series-fed array antenna so that the microstrip series-fed array antenna can simultaneously generate radiation in two polarization modes and can simultaneously control the patterns of the two polarizations to meet the requirements of vehicle-mounted millimeter-wave radars. Summary of the Invention

[0004] The embodiments of this application aim to provide a microstrip series-fed array antenna and a vehicle-mounted millimeter-wave radar, aiming to solve the problem that the current microstrip series-fed antenna cannot meet the requirement of simultaneously generating radiation in two polarization modes and can simultaneously control the patterns of the two polarizations.

[0005] To solve the above technical problems, the embodiments of this application provide the following technical solutions: A microstrip series-fed array antenna, the microstrip series-fed array antenna includes: an antenna, a dielectric substrate, and a metal ground; where:

[0006] The dielectric substrate is disposed above the metal ground in a covering manner;

[0007] The antenna is disposed above the dielectric substrate and is used to form a radiation pattern with vertical polarization and a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization.

[0008] Optionally, the antenna includes at least one microstrip series-fed array module, and the microstrip series-fed array module is disposed above the dielectric substrate and is used to form a radiation pattern with vertical polarization and a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization.

[0009] Optionally, the microstrip series-fed array module includes: an antenna port, a microstrip main feeder, a plurality of through-hole units, and a plurality of comb-shaped units;

[0010] The antenna port is arranged at one end of the microstrip main feeder;

[0011] A plurality of through-hole units form a through-hole array arranged on the microstrip main feeder for forming a radiation pattern with vertical polarization;

[0012] A plurality of comb-shaped units form a comb-shaped array arranged on the microstrip main feeder and are connected to the through-hole array formed by a plurality of through-hole units for forming a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization.

[0013] Optionally, a plurality of through-hole units form a through-hole array arranged on the microstrip main feeder, the length of the through-hole unit is 0.5 dielectric wavelengths, and the distance between adjacent through-hole units is 1 dielectric wavelength.

[0014] Optionally, a plurality of comb-shaped units form a comb-shaped array arranged on the microstrip main feeder, the length of the comb-shaped unit is 0.5 dielectric wavelengths, and the distance between adjacent comb-shaped units is 1 dielectric wavelength.

[0015] Optionally, when the number of through-hole units is greater than or equal to the number of comb-shaped units, a plurality of comb-shaped units and a plurality of through-hole units overlap in position on the microstrip main feeder, the comb-shaped units are arranged at the center positions between two adjacent through-hole units, and adjacent comb-shaped units point to both sides of the microstrip main feeder.

[0016] Optionally, when the number of through-hole units is greater than or equal to the number of comb-shaped units, a plurality of comb-shaped units and a plurality of through-hole units overlap in position on the microstrip main feeder, the comb-shaped units are arranged at the center positions between two adjacent through-hole units, and adjacent comb-shaped units point to the same side of the microstrip main feeder.

[0017] Optionally, when the number of through-hole units is less than the number of comb-shaped units, a plurality of comb-shaped units and a plurality of through-hole units overlap in position on the microstrip main feeder, the comb-shaped units between the through-hole units are arranged at the center positions between two adjacent through-hole units, and adjacent comb-shaped units point to both sides of the microstrip main feeder; the comb-shaped units not between the through-hole units are alternately arranged on both sides of the microstrip main feeder and point to both sides of the microstrip main feeder.

[0018] Optionally, when the number of through-hole units is less than the number of comb-shaped units, a plurality of comb-shaped units and a plurality of through-hole units overlap in position on the microstrip main feeder, the comb-shaped units between the through-hole units are arranged at the center positions between two adjacent through-hole units, and adjacent comb-shaped units point to both sides of the microstrip main feeder; the comb-shaped units not between the through-hole units point to the same side of the microstrip main feeder.

[0019] Optionally, when the number of the through-hole units is less than that of the comb-shaped units, several comb-shaped units and several through-hole units overlap with each other in the position on the microstrip main feeder. The comb-shaped units between the through-hole units are arranged at the central positions of two adjacent through-hole units, and adjacent comb-shaped units point to the same side of the microstrip main feeder; the comb-shaped units not between the through-hole units are alternately arranged on both sides of the microstrip main feeder and point to both sides of the microstrip main feeder.

[0020] Optionally, several comb-shaped units and several through-hole units do not overlap with each other in the position on the microstrip main feeder, and a comb array formed by several comb-shaped units is connected to a through-hole array formed by several through-hole units.

[0021] Optionally, when the antenna includes more than two microstrip series-fed array modules, the antenna ports of all the microstrip series-fed array modules are connected in series to form a microstrip series-fed array antenna planar array; wherein,

[0022] Among the multiple microstrip series-fed array modules forming the microstrip series-fed array planar array, the multiple microstrip series-fed array modules all come from the combination of the microstrip series-fed array modules in the same embodiment of any embodiment of the present application, or the multiple microstrip series-fed array modules respectively come from the combination of the microstrip series-fed array modules in different embodiments of any embodiment of the present application.

[0023] To solve the above technical problems, the embodiments of the present application also provide the following technical solution: a vehicle-mounted millimeter-wave radar, and the vehicle-mounted millimeter-wave radar includes the microstrip series-fed array antenna described in any embodiment of the present application.

[0024] Compared with the prior art, a microstrip series-fed array antenna and a vehicle-mounted millimeter-wave radar provided by the embodiments of the present application, the microstrip series-fed array antenna includes an antenna, a dielectric substrate and a metal ground; the dielectric substrate is covered and arranged above the metal ground; the antenna is arranged above the dielectric substrate and is used to form a radiation pattern with vertical polarization and a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization. Thus, the microstrip series-fed array antenna can simultaneously generate radiation in two polarization modes of horizontal polarization mode and vertical polarization mode. The two polarization modes are orthogonal to each other and exist independently, and no interference phenomenon will occur, and the radiation patterns of the two polarizations can be controlled simultaneously, meeting the requirements of the vehicle-mounted millimeter-wave radar, thereby solving the problem that the current microstrip series-fed antenna cannot meet the requirements of simultaneously generating two polarization beams and simultaneously being able to control the radiation patterns of the two polarizations. Description of the Drawings

[0025] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise stated. The drawings in the figures do not constitute a scale limitation.

[0026] Figure 1 It is a schematic structural diagram of a microstrip series-fed array antenna provided by the present application;

[0027] Figure 2 It is a schematic structural diagram of an antenna in a microstrip series-fed array antenna provided by the present application;

[0028] Figure 3 It is a first schematic structural diagram of a microstrip series-fed array module of an antenna in a microstrip series-fed array antenna provided by the present application;

[0029] Figure 4 It is a second schematic structural diagram of a microstrip series-fed array module of an antenna in a microstrip series-fed array antenna provided by the present application;

[0030] Figure 5 It is a third schematic structural diagram of a microstrip series-fed array module of an antenna in a microstrip series-fed array antenna provided by the present application;

[0031] Figure 6 It is a fourth schematic structural diagram of a microstrip series-fed array module of an antenna in a microstrip series-fed array antenna provided by the present application;

[0032] Figure 7 It is a fifth schematic structural diagram of a microstrip series-fed array module of an antenna in a microstrip series-fed array antenna provided by the present application;

[0033] Figure 8 It is a sixth schematic structural diagram of a microstrip series-fed array module of an antenna in a microstrip series-fed array antenna provided by the present application;

[0034] Figure 9 It is a schematic diagram of the effect of a microstrip series-fed array antenna provided by the present application;

[0035] Figure 10 It is a schematic structural diagram of a vehicle-mounted millimeter-wave radar provided by the present application.

[0036] Reference numerals:

[0037] Microstrip series-fed array antenna 10, Metal ground 3

[0038] Dielectric substrate 2, Antenna 1

[0039] Microstrip series-fed array module 11, Antenna port 111

[0040] Microstrip main feeder 112, Through-hole unit 113

[0041] Comb-shaped unit 114 Detailed implementation manner

[0042] To facilitate the understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "bottom", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in this specification in the description of the present application are only for the purpose of describing specific embodiments and are not used to limit the present application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0044] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0045] The microstrip series-fed array antenna is the most commonly used antenna form for vehicle-mounted millimeter-wave radars. The polarization method of traditional conventional microstrip series-fed array antennas generally adopts a single linear polarization and can only generate one polarization beam. Therefore, traditional conventional microstrip series-fed array antennas can only generate one polarization beam and can only control the pattern of a single polarization. However, in some application scenarios of vehicle-mounted millimeter-wave radars, a microstrip series-fed array antenna that can generate radiation of two polarization modes simultaneously and can control the patterns of two polarizations simultaneously is required. Traditional conventional microstrip series-fed array antennas cannot meet the above requirements of vehicle-mounted millimeter-wave radars.

[0046] In view of this, the present application provides a microstrip series-fed array antenna. The microstrip series-fed array antenna includes an antenna, a dielectric substrate, and a metal ground; the dielectric substrate is disposed above the metal ground in a covering manner; the antenna is disposed above the dielectric substrate to form a radiation pattern with vertical polarization and a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization. Thus, the microstrip series-fed array antenna can simultaneously generate radiations in two polarization modes, namely, the horizontal polarization mode and the vertical polarization mode. The two polarization modes are orthogonal to each other and exist independently, without generating interference phenomena, and can simultaneously control the radiation patterns of the two polarizations, meeting the requirements of vehicle-mounted millimeter-wave radars, thereby solving the problem that the current microstrip series-fed antennas cannot meet the requirements of simultaneously generating two polarization beams and simultaneously controlling the radiation patterns of the two polarizations.

[0047] To facilitate the understanding of the above inventive concept of the present application, the following further describes the above inventive concept of the present application in detail with reference to the accompanying drawings and specific embodiments.

[0048] In one embodiment, as Figure 1 shown, the present application provides a microstrip series-fed array antenna. The microstrip series-fed array antenna 10 includes: an antenna 1, a dielectric substrate 2, and a metal ground 3; wherein:

[0049] The dielectric substrate 2 is disposed above the metal ground 3 in a covering manner;

[0050] The antenna 1 is disposed above the dielectric substrate 2 and is used to form a radiation pattern with vertical polarization and a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization.

[0051] In this embodiment, the microstrip series-fed array antenna includes an antenna, a dielectric substrate, and a metal ground; the dielectric substrate is disposed above the metal ground in a covering manner; the antenna is disposed above the dielectric substrate and is used to form a radiation pattern with vertical polarization and a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization. Thus, the microstrip series-fed array antenna can simultaneously generate radiations in two polarization modes, namely, the horizontal polarization mode and the vertical polarization mode. The two polarization modes are orthogonal to each other and exist independently, without generating interference phenomena, and can simultaneously control the radiation patterns of the two polarizations, meeting the requirements of vehicle-mounted millimeter-wave radars, thereby solving the problem that the current microstrip series-fed antennas cannot meet the requirements of simultaneously generating two polarization beams and simultaneously controlling the radiation patterns of the two polarizations.

[0052] In one embodiment, as Figure 2As shown, the antenna 1 includes at least one microstrip series-fed array module 11. The microstrip series-fed array module 11 is disposed above the dielectric substrate 2, and is configured to form a radiation pattern with vertical polarization and a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization.

[0053] In one embodiment, as Figure 3 shown, the microstrip series-fed array module 11 includes: an antenna port 111, a microstrip main feeder 112, a plurality of through-hole units 113, and a plurality of comb-shaped units 114; wherein:

[0054] The antenna port 111 is disposed at one end of the microstrip main feeder 112;

[0055] A plurality of through-hole units 113 form a through-hole array disposed on the microstrip main feeder 112, and are configured to form a radiation pattern with vertical polarization;

[0056] A plurality of comb-shaped units 114 form a comb-shaped array disposed on the microstrip main feeder 112, and are connected to the through-hole array formed by the plurality of through-hole units 113, and are configured to form a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization.

[0057] In this embodiment, the microstrip series-fed array antenna includes at least one microstrip series-fed array module. The microstrip series-fed array module includes a microstrip main feeder, a plurality of through-hole units, and a plurality of comb-shaped units. A plurality of through-hole units form a through-hole array disposed on the microstrip main feeder to form a radiation pattern with vertical polarization; a plurality of comb-shaped units form a comb-shaped array disposed on the microstrip main feeder and are connected to the through-hole array formed by the plurality of through-hole units to form a radiation pattern with horizontal polarization that is orthogonal to the radiation pattern with vertical polarization. Thus, a novel microstrip series-fed array is formed by combining the comb-shaped array and the through-hole array, which can simultaneously generate radiation in two polarization modes, namely, horizontal polarization mode and vertical polarization mode. The two polarization modes are orthogonal to each other and exist independently, without interference, and can simultaneously control the radiation patterns of the two polarizations, meeting the requirements of vehicle-mounted millimeter-wave radars, thereby solving the problem that the current microstrip series-fed antennas cannot meet the requirements of simultaneously generating two polarization beams and simultaneously controlling the radiation patterns of the two polarizations.

[0058] In one embodiment, as Figures 3 to 8 shown, a plurality of the through-hole units 113 form a through-hole array disposed on the microstrip main feeder 112, and are configured to form a radiation pattern with vertical polarization.

[0059] A plurality of the comb-shaped units 114 are arranged in a comb-shaped array on the microstrip main feeder 112 and are connected to a through-hole array formed by a plurality of through-hole units 113 for forming a horizontally polarized radiation pattern, and the horizontally polarized radiation pattern is orthogonal to the vertically polarized radiation pattern.

[0060] Specifically, the number of the through-hole units 113 is M (M is an integer). M through-hole units 113 are arranged in a through-hole array on the microstrip main feeder 112. Wherein, the length of the through-hole unit 113 is 0.5 dielectric wavelengths, and the spacing between adjacent through-hole units is 1 dielectric wavelength.

[0061] The number of the comb-shaped units 114 is N (N is an integer). N comb-shaped units 114 are arranged on the microstrip main feeder 112 and are connected to a through-hole array formed by M through-hole units 113. Wherein, the length of the comb-shaped unit 114 is 0.5 dielectric wavelengths, and the spacing between adjacent comb-shaped units is 1 dielectric wavelength.

[0062] Embodiment 1:

[0063] In this Embodiment 1, as Figure 3 shown, it is a first structural schematic diagram of a microstrip series-feed array module of an antenna in a microstrip series-feed array antenna provided by the present application.

[0064] In Figure 3 , the number M of the through-hole units 113 in the microstrip series-feed array module is greater than or equal to the number N of the comb-shaped units 114 (M≥N). The positions of the N comb-shaped units 114 and the M through-hole units 113 overlap on the microstrip main feeder 112. All the comb-shaped units 114 are located between the through-hole units 113. The comb-shaped units 114 are arranged at the central positions between two adjacent through-hole units 113, and the adjacent comb-shaped units 114 point to both sides of the microstrip main feeder 112.

[0065] In this embodiment, the widths of the comb-shaped units 114 and the through-hole units 113 can be changed to reduce the sidelobes of the pattern.

[0066] Embodiment 2:

[0067] In this Embodiment 2, as Figure 4 shown, it is a second structural schematic diagram of a microstrip series-feed array module of an antenna in a microstrip series-feed array antenna provided by the present application.

[0068] In Figure 4Among them, the number M of the through-hole units 113 in the microstrip series-fed array module is greater than or equal to the number N of the comb-shaped units 114 (M≥N). The N comb-shaped units 114 and the M through-hole units 113 overlap with each other at the position of the microstrip main feeder 112. All the comb-shaped units 114 are located between the through-hole units 113. The comb-shaped units 114 are arranged at the central positions between two adjacent through-hole units 113, and the adjacent comb-shaped units 114 point to the same side of the microstrip main feeder 112.

[0069] In this embodiment, the widths of the comb-shaped unit 114 and the through-hole unit 113 can be changed to reduce the sidelobe of the radiation pattern.

[0070] Embodiment 3:

[0071] In this Embodiment 3, as Figure 5 shown, it is the third structural schematic diagram of the microstrip series-fed array module of the antenna in a microstrip series-fed array antenna provided by the present application.

[0072] In Figure 5 Among them, the number M of the through-hole units 113 in the microstrip series-fed array module is less than the number N of the comb-shaped units 114 (M<N). The N comb-shaped units 114 and the M through-hole units 113 overlap with each other at the position of the microstrip main feeder 112. The comb-shaped units 114 located between the through-hole units 113 are arranged at the central positions between two adjacent through-hole units 113, and the adjacent comb-shaped units 114 point to both sides of the microstrip main feeder 112; the comb-shaped units 114 not located between the through-hole units 113 are alternately arranged on both sides of the microstrip main feeder 112 and point to both sides of the microstrip main feeder 112.

[0073] In this embodiment, the widths of the comb-shaped unit 114 and the through-hole unit 113 can be changed to reduce the sidelobe of the radiation pattern.

[0074] Embodiment 4:

[0075] In this Embodiment 4, as Figure 6 shown, it is the fourth structural schematic diagram of the microstrip series-fed array module of the antenna in a microstrip series-fed array antenna provided by the present application.

[0076] In Figure 6 Among them, the number M of the through-hole units 113 in the microstrip series-fed array module is less than the number N of the comb-shaped units 114 (M<N). The N comb-shaped units 114 and the M through-hole units 113 overlap with each other at the position of the microstrip main feeder 112. The comb-shaped units 114 located between the through-hole units 113 are arranged at the central positions between two adjacent through-hole units 113, and the adjacent comb-shaped units 114 point to both sides of the microstrip main feeder 112; the comb-shaped units 114 not located between the through-hole units 113 point to the same side of the microstrip main feeder 112.

[0077] In this embodiment, the widths of the comb-shaped unit 114 and the through-hole unit 113 can be changed to reduce the sidelobes of the radiation pattern.

[0078] Embodiment 5:

[0079] In this Embodiment 5, as Figure 7 shown, it is the fifth structural schematic diagram of the microstrip series-fed array module of the antenna in a microstrip series-fed array antenna provided by the present application.

[0080] In Figure 7 , in the microstrip series-fed array module, the number M of the through-hole units 113 is less than the number N of the comb-shaped units 114 (M < N). The N comb-shaped units 114 and the M through-hole units 113 overlap with each other in the position of the microstrip main feeder 112. The comb-shaped units 114 located between the through-hole units 113 are arranged at the central positions of two adjacent through-hole units 113, and the adjacent comb-shaped units 114 point to the same side of the microstrip main feeder 112; the comb-shaped units 114 not located between the through-hole units 113 are alternately arranged on both sides of the microstrip main feeder 112 and point to both sides of the microstrip main feeder 112.

[0081] In this embodiment, the widths of the comb-shaped unit 114 and the through-hole unit 113 can be changed to reduce the sidelobes of the radiation pattern.

[0082] Embodiment 6:

[0083] In this Embodiment 6, as Figure 8 shown, it is the sixth structural schematic diagram of the microstrip series-fed array module of the antenna in a microstrip series-fed array antenna provided by the present application.

[0084] In Figure 8 , in the microstrip series-fed array module, the through-hole unit 113 and the comb-shaped unit 114 do not overlap with each other in the position of the microstrip main feeder 112. The M through-hole units 113 form a through-hole array and are arranged on the microstrip main feeder 112 for forming a radiation pattern with vertical polarization; the N comb-shaped units 114 are arranged on the microstrip main feeder 112, do not overlap with the M through-hole units 113 in the position of the microstrip main feeder 112, and are connected to the through-hole array formed by the M through-hole units 113 for forming a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization.

[0085] In this embodiment, the widths of the comb-shaped unit 114 and the through-hole unit 113 can be changed to reduce the sidelobes of the radiation pattern.

[0086] Embodiment 7:

[0087] In this Embodiment 7, asFigure 2 As shown in Figure 2 , when the antenna 1 includes more than two microstrip series-fed array modules 11, the antenna ports 111 of all the microstrip series-fed array modules 11 are connected in series to form a microstrip series-fed array planar array.

[0088] Among the multiple microstrip series-fed array modules 11 forming the microstrip series-fed array planar array, the multiple microstrip series-fed array modules 11 can all come from the combination of the microstrip series-fed array modules 11 in the same embodiment among Embodiments 1 to 6, or can come from the combination of the microstrip series-fed array modules 11 in different embodiments among Embodiments 1 to 6.

[0089] In this embodiment, the widths of the comb-shaped unit 114 and the through-hole unit 113 can be changed to reduce the sidelobe of the radiation pattern.

[0090] Specifically, taking Embodiment 1 with 16 (M = 16) comb-shaped units 114 and 15 (N = 15) through-hole units 113 as an example, the technical solution of a microstrip series-fed array antenna provided by the present application will be further described in detail.

[0091] In this embodiment, the microstrip series-fed array antenna 10 includes: an antenna 1, a dielectric substrate 2, and a metal ground 3; where:

[0092] The dielectric substrate 2 is covered and disposed above the metal ground 3;

[0093] The antenna 1 is disposed above the dielectric substrate 2, and the antenna 1 includes a microstrip series-fed array module 11; the microstrip series-fed array module 11 includes: an antenna port 111, a microstrip main feeder 112, 16 through-hole units 113, and 15 comb-shaped units 114; where:

[0094] The antenna port 111 is disposed at one end of the microstrip main feeder 112;

[0095] 16 through-hole units 113 form a through-hole array and are disposed on the microstrip main feeder 112 for forming a radiation pattern with vertical polarization;

[0096] 15 comb-shaped units 114 form a comb-shaped array and are disposed on the microstrip main feeder 112, overlapping with the 16 through-hole units 113 in position on the microstrip main feeder 112. All the comb-shaped units 114 are between the through-hole units 113. The comb-shaped units 114 are disposed at the center positions between two adjacent through-hole units 113, and adjacent comb-shaped units 114 point to both sides of the microstrip main feeder 112 for forming a radiation pattern with horizontal polarization, and the radiation pattern with horizontal polarization is orthogonal to the radiation pattern with vertical polarization.

[0097] Such as Figure 9As shown, it is a schematic diagram of the effect of a microstrip series-fed array antenna provided by this application.

[0098] In Figure 9 , a microstrip series-fed array antenna provided by this application can generate a horizontal polarization pattern (as shown by the dashed line in Figure 9 ) and a vertical polarization pattern (as shown by the solid line in Figure 9 ). The two polarization modes are orthogonal to each other and exist independently, without interference. And the direction patterns of the two polarizations of the generated horizontal polarization pattern and vertical polarization pattern can be designed and controlled separately as needed. As shown in Figure 9 , the vertical polarization pattern is a high-gain single beam, and the horizontal polarization pattern is a low-gain dual beam with the dual beams pointing to positive and negative large angles.

[0099] Based on the same concept, in one embodiment, as shown in Figure 10 , this application provides a vehicle-mounted millimeter-wave radar, and the vehicle-mounted millimeter-wave radar includes the microstrip series-fed array antenna 10 described in any of the above embodiments.

[0100] In this embodiment, the microstrip series-fed array antenna 10 is the same as the microstrip series-fed array antenna 10 described in any of the above embodiments. The specific structure and function can refer to the microstrip series-fed array antenna 10 described in any of the above embodiments, and will not be elaborated here.

[0101] In this embodiment, the vehicle-mounted millimeter-wave radar includes a microstrip series-fed array antenna. Through the microstrip series-fed array antenna, it includes at least one microstrip series-fed array module. The microstrip series-fed array module includes a microstrip main feeder, a plurality of through-hole units, and a plurality of comb-shaped units. The plurality of through-hole units form a through-hole array arranged on the microstrip main feeder to form a vertical polarization radiation pattern; the plurality of comb-shaped units form a comb array arranged on the microstrip main feeder and are connected to the through-hole array formed by the plurality of through-hole units to form a horizontal polarization radiation pattern orthogonal to the vertical polarization radiation pattern. Thus, by combining the comb array and the through-hole array, a new type of microstrip series-fed array is formed, which can generate radiation in two polarization modes of horizontal polarization mode and vertical polarization mode at the same time. The two polarization modes are orthogonal to each other and exist independently, without interference, and can control the direction patterns of the two polarizations at the same time, meeting the requirements of the vehicle-mounted millimeter-wave radar, thereby solving the problem that the current microstrip series-fed antenna cannot meet the requirements of simultaneously generating two polarization beams and being able to control the direction patterns of the two polarizations at the same time.

[0102] It should be noted that the above vehicle-mounted millimeter-wave radar embodiment and the microstrip series-fed array antenna embodiment belong to the same concept. The specific implementation process is detailed in the microstrip series-fed array antenna embodiment, and the technical features in the microstrip series-fed array antenna embodiment are all correspondingly applicable in the vehicle-mounted millimeter-wave radar embodiment, and will not be elaborated here.

[0103] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present application as described above. For the sake of brevity, they are not provided in detail; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application.

Claims

1. A microstrip series-fed array antenna, characterized in that, The microstrip series-fed array antenna includes: an antenna, a dielectric substrate, and a metal ground; where: The dielectric substrate is disposed covering above the metal ground; The antenna includes at least one microstrip series-fed array module disposed above the dielectric substrate, and the microstrip series-fed array module includes: an antenna port, a microstrip main feeder, a plurality of through-hole units, and a plurality of comb-shaped units; The antenna port is disposed at one end of the microstrip main feeder; A plurality of through-hole units form a through-hole array disposed on the microstrip main feeder for forming a radiation pattern with vertical polarization; A plurality of comb-shaped units form a comb-shaped array disposed on the microstrip main feeder and are connected to the through-hole array formed by the plurality of through-hole units for forming a radiation pattern with horizontal polarization orthogonal to the radiation pattern with vertical polarization.

2. The microstrip series-fed array antenna according to claim 1, wherein A plurality of through-hole units form a through-hole array disposed on the microstrip main feeder, the length of the through-hole unit is 0.5 dielectric wavelengths, and the spacing between adjacent through-hole units is 1 dielectric wavelength.

3. The microstrip series-fed array antenna according to claim 1, characterized in that, A plurality of comb-shaped units form a comb-shaped array disposed on the microstrip main feeder, the length of the comb-shaped unit is 0.5 dielectric wavelengths, and the spacing between adjacent comb-shaped units is 1 dielectric wavelength.

4. The microstrip series-fed array antenna according to claim 1, characterized in that When the number of through-hole units is greater than or equal to the number of comb-shaped units, the positions of the plurality of comb-shaped units and the plurality of through-hole units on the microstrip main feeder overlap with each other, the comb-shaped units are disposed at the center positions between two adjacent through-hole units, and adjacent comb-shaped units point to both sides of the microstrip main feeder.

5. The microstrip series-fed array antenna according to claim 1, wherein When the number of through-hole units is greater than or equal to the number of comb-shaped units, the positions of the plurality of comb-shaped units and the plurality of through-hole units on the microstrip main feeder overlap with each other, the comb-shaped units are disposed at the center positions between two adjacent through-hole units, and adjacent comb-shaped units point to the same side of the microstrip main feeder.

6. The microstrip series-fed array antenna according to claim 1, wherein When the number of through-hole units is less than the number of comb-shaped units, the positions of the plurality of comb-shaped units and the plurality of through-hole units on the microstrip main feeder overlap with each other, the comb-shaped units between the through-hole units are disposed at the center positions between two adjacent through-hole units, and adjacent comb-shaped units point to both sides of the microstrip main feeder; the comb-shaped units not between the through-hole units are alternately disposed on both sides of the microstrip main feeder and point to both sides of the microstrip main feeder.

7. The microstrip series-fed array antenna according to claim 1, characterized in that When the number of through-hole units is less than the number of comb-shaped units, the positions of the plurality of comb-shaped units and the plurality of through-hole units on the microstrip main feeder overlap with each other, the comb-shaped units between the through-hole units are disposed at the center positions between two adjacent through-hole units, and adjacent comb-shaped units point to both sides of the microstrip main feeder; the comb-shaped units not between the through-hole units point to the same side of the microstrip main feeder.

8. The microstrip series-fed array antenna according to claim 1, wherein When the number of through-hole units is less than the number of comb-shaped units, the positions of the plurality of comb-shaped units and the plurality of through-hole units on the microstrip main feeder overlap with each other, the comb-shaped units between the through-hole units are disposed at the center positions between two adjacent through-hole units, and adjacent comb-shaped units point to the same side of the microstrip main feeder; the comb-shaped units not between the through-hole units are alternately disposed on both sides of the microstrip main feeder and point to both sides of the microstrip main feeder.

9. The microstrip series-fed array antenna according to claim 1, wherein A plurality of comb-shaped units and a plurality of through-hole units do not overlap with each other in the position of the microstrip main feeder, and a comb-shaped array formed by the plurality of comb-shaped units is connected to a through-hole array formed by the plurality of through-hole units.

10. The microstrip series-fed array antenna according to any one of claims 4 to 9, characterized in that, When the antenna includes more than two microstrip series-fed array modules, the antenna ports of all the microstrip series-fed array modules are connected in series to form a microstrip series-fed array antenna planar array; among them, Among the multiple microstrip series-fed array modules forming the microstrip series-fed array planar array, the multiple microstrip series-fed array modules all come from the combination of the microstrip series-fed array modules in the same item of any one of claims 4 to 9, or the multiple microstrip series-fed array modules respectively come from the combination of the microstrip series-fed array modules in any one of claims 4 to 9.

11. A vehicle-mounted millimeter-wave radar, characterized in that, The vehicle-mounted millimeter-wave radar includes the microstrip series-fed array antenna according to any one of claims 1 to 10.

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