Antenna systems and cameras

Abstract

The present application discloses an antenna system and a camera, and relates to the field of wireless communication technology. The antenna system is applied to a camera, and includes an antenna and an antenna cover that are arranged relatively to each other, wherein the antenna includes a substrate and at least two antenna bodies arranged on the substrate and arranged in sequence; the antenna cover includes at least two wave-transmitting units that are connected in sequence, and each wave-transmitting unit is arranged relatively to each antenna body in a one-to-one correspondence, and each wave-transmitting unit includes a main wave-transmitting portion and a strip-shaped protrusion, wherein the strip-shaped protrusion is arranged on a side of the main wave-transmitting portion facing the antenna body, and the distance between the strip-shaped protrusion and the center of the antenna body is an integer multiple of half an air wavelength, and in the thickness direction of the substrate, the orthographic projection of the strip-shaped protrusion is staggered with the orthographic projection of the antenna body, and at least partially overlaps with the orthographic projection of the beam of the antenna body, and the phase of the beam of the antenna body transmitted to each interface of the wave-transmitting unit is equal. This solution can solve the problem that the current antenna system is affected by the antenna cover, resulting in a small beam width.

Description

Technical Field

[0001] The present application belongs to the field of wireless communication technology, and specifically relates to an antenna system and a camera. Background Art

[0002] The radome is a structural component that protects the antenna from the external environment. It is an important component of the antenna system and is called the "electromagnetic window" of the antenna system. It forms a closed space around the antenna to protect the antenna system from wind, sand, rain, snow, etc., thereby alleviating the impact of sudden temperature changes, solar radiation, humidity and other environmental conditions on the antenna system.

[0003] However, in actual applications, the radome is also an obstacle in front of the antenna, which absorbs and reflects the electromagnetic waves radiated by the antenna, thereby changing the electromagnetic energy distribution of the antenna and affecting the performance of the antenna to a certain extent. At present, most radomes are flat-plate structures, which can only maintain the coverage angle of the antenna body of the antenna system. For the entire antenna system, its beam width is still relatively small. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an antenna system and a camera, which can solve the problem that the current antenna system is affected by the antenna cover, resulting in a small beam width.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides an antenna system, which is applied to a camera and includes an antenna and an antenna cover arranged opposite to each other.

[0007] Wherein, the antenna comprises a substrate and at least two antenna bodies arranged in sequence and spaced apart from each other, and each of the antenna bodies is arranged on a side of the substrate facing the antenna cover;

[0008] The antenna cover includes at least two wave-transmitting units connected in sequence, each of the wave-transmitting units is arranged relative to each of the antenna bodies in a one-to-one correspondence, each of the wave-transmitting units includes a main wave-transmitting portion and a strip-shaped protrusion, the strip-shaped protrusion is arranged on a side of the main wave-transmitting portion facing the antenna body, the distance between the strip-shaped protrusion and the center of the antenna body is an integer multiple of half an air wavelength, in the thickness direction of the substrate, the orthographic projection of the strip-shaped protrusion is staggered with the orthographic projection of the antenna body, and at least partially overlaps with the orthographic projection of the beam of the antenna body, and the phase of the beam of the antenna body transmitted to each interface of the wave-transmitting unit is equal.

[0009] In a second aspect, an embodiment of the present application further provides a camera, comprising a housing, a camera module and the above-mentioned antenna system, wherein the camera module and the antenna system are both disposed in the housing.

[0010] In an embodiment of the present application, the antenna cover includes at least two wave-transmitting units connected in sequence, each wave-transmitting unit is arranged relative to each antenna body in a one-to-one correspondence, each wave-transmitting unit includes a main wave-transmitting portion and a strip-shaped protrusion, the strip-shaped protrusion is arranged on a side of the main wave-transmitting portion facing the antenna body, the distance between the strip-shaped protrusion and the center of the antenna body is an integer multiple of half an air wavelength, and in the thickness direction of the substrate, the orthographic projection of the strip-shaped protrusion is staggered with the orthographic projection of the antenna body, and at least partially overlaps with the orthographic projection of the beam of the antenna body, and the phase of the beam of the antenna body transmitted to each interface of the wave-transmitting unit is equal. Compared with a flat-plate structure radome, since the phase of the beam of the same antenna body transmitted to the interface of the radome is different, this solution sets a strip-shaped protrusion on the side of the main wave-transmitting part of the radome facing the antenna body, so that the distance between the interface of the antenna body and the wave-transmitting unit is basically consistent within the plane where the cross section of the strip-shaped protrusion is located, thereby changing the phase length of the beam of the antenna body reaching the interface of the wave-transmitting unit, making the phase of the beam of the antenna body transmitted to each point on the interface of the wave-transmitting unit equal, thereby reducing the amount of electromagnetic waves reflected by the radome, so as to optimize the performance of the large-angle radiation pattern of the antenna system, which is conducive to reducing the influence of the radome on the performance of the antenna, and further widening the beam width of the electromagnetic waves passing through the radome. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 An exploded diagram of the antenna system disclosed in an embodiment of the present application;

[0012] Figures 2 to 4 It is a schematic diagram of the structure of the antenna system disclosed in the embodiment of the present application at different viewing angles;

[0013] Figure 5 A schematic diagram of the structure of a camera disclosed in an embodiment of the present application;

[0014] Figure 6 An exploded view of a camera disclosed in an embodiment of the present application;

[0015] Figure 7 is a curve diagram of beam width variation of an antenna system in an existing camera;

[0016] Figure 8 is a curve diagram of the beam width variation of the antenna system in the camera disclosed in the embodiment of the present application,

[0017] in, Figures 7 and 8 The horizontal axis represents the Theta angle, the vertical axis represents the gain value, the solid line is the horizontal beam width change curve, and the dotted line is the vertical beam width change curve.

[0018] Description of reference numerals:

[0019] 100 - antenna, 110 - substrate, 120 - antenna body, 121 - radiator, 122 - receiver;

[0020] 200-radome, 210-wave-transmitting unit, 211-main wave-transmitting portion, 212-strip protrusion, 212a-first strip protrusion, 212b-second strip protrusion, 212c-third strip protrusion, 212d-fourth strip protrusion, 220-first side wave-transmitting portion, 230-second side wave-transmitting portion;

[0021] 310 - housing, 311 - shooting window, 320 - camera module, 330 - antenna system. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0024] The antenna system and the camera provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0025] like Figures 1 to 6 As shown, an embodiment of the present application discloses an antenna system, which is applied to a camera. Of course, the antenna system can also be applied to equipment such as cars and airplanes, and the embodiment of the present application does not impose specific limitations on this.

[0026] The antenna system includes an antenna 100 and a radome 200 which are arranged relatively. Optionally, the antenna 100 may be a microstrip antenna, a comb antenna or a waveguide antenna, etc., and the embodiment of the present application does not impose specific restrictions on this. Further, optionally, the antenna 100 in the present application may be a microstrip antenna, which has the characteristics of low profile and wide bandwidth. Optionally, the substrate 110 may be a PCB board for easy manufacturing. The radome 200 is used to protect the antenna 100 from being affected by the external environment. It is also the "electromagnetic window" of the antenna system. The antenna 100 can transmit the electromagnetic waves radiated by it to the external environment through the radome 200, and the electromagnetic waves in the external environment can also be received by the antenna 100 through the radome 200. Optionally, in the process of manufacturing the radome 200, a material with low loss and low dielectric constant can be selected to manufacture the radome 200, and the embodiment of the present application does not impose specific restrictions on this.

[0027] The antenna 100 includes a substrate 110 and at least two antenna bodies 120 arranged in sequence and at intervals, and each antenna body 120 is disposed on a side of the substrate 110 facing the antenna cover 200. Optionally, the substrate 110 may be a strip-shaped structure, and each antenna body 120 may be arranged in sequence and at intervals along the length direction of the substrate 110, thereby facilitating the arrangement of each antenna body 120.

[0028] The antenna cover 200 includes at least two wave-transmitting units 210 connected in sequence, and each wave-transmitting unit 210 is arranged opposite to each antenna body 120 in a one-to-one correspondence. Each wave-transmitting unit 210 includes a main wave-transmitting portion 211 and a strip protrusion 212. The strip protrusion 212 is arranged on a side of the main wave-transmitting portion 211 facing the antenna body 120. The distance between the strip protrusion 212 and the center of the antenna body 120 is an integer multiple of half an air wavelength (the distance between the strip protrusion 212 and the center of the antenna body 120 may be completely equal to or approximately equal to an integer multiple of half an air wavelength). The center of the antenna body 120 here specifically refers to the phase center of the antenna body 120.

[0029] Optionally, in order to minimize the reflection effect of the antenna cover 200 on the antenna 100, the optimal spacing between the antenna body 120 of the antenna 100 and the wave-transmitting unit 210 of the antenna cover 200 which are arranged relatively to each other needs to satisfy the following formula:

[0030]

[0031] Wherein, D is the optimal distance between the center of the relatively arranged antenna body 120 and the wave-transmitting unit 210. The optimal distance here is specifically the distance between the center of the antenna body 120 and the first part of the main wave-transmitting portion 211 located directly above the antenna body 120 in the thickness direction of the substrate 110 (the main wave-transmitting portion 211 includes a first part, a second part and a third part connected in sequence along the width direction of the strip protrusion 212, and the strip protrusion 212 is arranged in the second part), or the distance between the center of the antenna body 120 and the strip protrusion 212 located obliquely above the antenna body 120. Since the distance between the third part of the main wave-transmitting portion 211 and the center of the antenna body 120 is relatively far, the electromagnetic wave intensity at this position is relatively weak, or even not covered by the electromagnetic wave. Therefore, the distance between the third part of the main wave-transmitting portion 211 and the center of the antenna body 120 does not need to satisfy the above formula. n is a positive integer. is the wavelength of electromagnetic waves in air.

[0032] Optionally, in order to make the phase of the main wave-transmitting portion 211 of the radome 200 the same within the required operating frequency range, the thickness of the main wave-transmitting portion 211 of the radome 200 needs to satisfy the following formula:

[0033]

[0034] Wherein, Thickness is the thickness of the main wave-transmitting portion 211, f is the frequency, is the relative dielectric constant of the main wave-transmitting portion 211, n is a positive integer, and c is the speed of light.

[0035] In the thickness direction of the substrate 110, the orthographic projection of the strip protrusion 212 is staggered from the orthographic projection of the antenna body 120, and at least partially overlaps with the orthographic projection of the beam of the antenna body 120. The beam here specifically refers to the electromagnetic beam of the antenna body 120. The phases of the beam of the antenna body 120 transmitted to each interface of the wave-transmitting unit 210 are equal (including completely equal and approximately equal). The interface here specifically refers to the surface of the contact surface between the wave-transmitting unit 210 and the air that is close to the antenna body 120. By reducing the phase difference at each interface of the beam of the antenna body 120 transmitted to the wave-transmitting unit 210 of the radome 200, the electromagnetic wave is prevented from being distorted and causing a concave point in the radiation pattern of the antenna system.

[0036] It should be noted that, in the thickness direction of the substrate 110, the distance between the orthographic projection of the strip protrusion 212 and the orthographic projection of the antenna body 120 can be selected according to actual needs, and on this basis, the height of the strip protrusion 212 can be further determined, so that the distance between the antenna body 120 and the wave-transmitting unit 210 of the antenna cover 200 is basically equal, and the phase of the electromagnetic wave transmitted from the antenna body 120 to each part of the wave-transmitting unit 210 is equal.

[0037] In the embodiment of the present application, relative to the antenna cover 200 with a flat structure, since the phase of the beam of the same antenna body 120 transmitted to the interface of the antenna cover 200 is different, the present solution provides a strip-shaped protrusion 212 on one side of the main wave-transmitting portion 211 of the antenna cover 200 facing the antenna body 120, so that the distance between the interface of the antenna body 120 and the wave-transmitting unit 210 of the antenna cover 200 is basically consistent within the plane where the cross section of the strip-shaped protrusion 212 (i.e., the cross section perpendicular to the length direction of the strip-shaped protrusion 212) is located, thereby changing the phase length of the interface of the beam of the antenna body 120 reaching the wave-transmitting unit 210, so that the phase of the beam of the antenna body 120 transmitted to each part of the interface of the wave-transmitting unit 210 is equal, thereby reducing the amount of electromagnetic wave reflection by the antenna cover 200, so as to optimize the performance depression of the large-angle radiation pattern of the antenna system, which is conducive to reducing the influence of the antenna cover 200 on the performance of the antenna, and further can widen the beam width of the electromagnetic wave passing through the antenna cover 200, that is, widen the beam width of the antenna system. Therefore, this solution can solve the problem that the current antenna system is affected by the antenna cover 200, resulting in a smaller beam width.

[0038] In an optional embodiment, the number of the strip-shaped protrusions 212 of each wave-transmitting unit 210 may be one. Since the beam of the antenna body 120 is scattered, the phase length reaching the main wave-transmitting portion 211 gradually increases in the direction away from the central axis of the beam. Therefore, the width of the strip-shaped protrusions 212 may be increased to further widen the beam width of the antenna system. Alternatively, the number of the strip-shaped protrusions 212 of at least one wave-transmitting unit 210 is at least two, and the at least two strip-shaped protrusions 212 include a first strip-shaped protrusion 212a and a second strip-shaped protrusion 212b which are arranged at intervals, and the height of the second strip-shaped protrusion 212b is greater than the height of the first strip-shaped protrusion 212a. 0, the orthographic projection of the second strip protrusion 212b and the orthographic projection of the first strip protrusion 212a are located on the same side of the orthographic projection of the same antenna body 120, and the orthographic projection of the first strip protrusion 212a is located between the orthographic projection of the second strip protrusion 212b and the orthographic projection of the antenna body 120, that is, the farther the position of the strip protrusion 212 is relative to the antenna body 120, the higher the height of the strip protrusion 212; in the thickness direction of the substrate 110, the orthographic projection of the antenna body 120, the orthographic projection of the first strip protrusion 212a and the orthographic projection of the second strip protrusion 212b are arranged in sequence along the width direction of the first strip protrusion 212a. This solution provides a plurality of strip protrusions 212. On the basis of ensuring that the beam width of the antenna system is broadened, during the process of manufacturing the antenna system, the spacing between adjacent strip protrusions 212 can be flexibly adjusted according to actual needs to adjust the beam width of the antenna system. For example, when the antenna system is applied to a camera, the number of strip protrusions 212 and the spacing between adjacent strip protrusions 212 can be flexibly adjusted according to the shooting field of view of the camera module of the camera, so that the shooting field of view of the camera module is adapted to the detection field of view of the antenna system.

[0039] Optionally, the spacing between adjacent strip protrusions 212 can be 1.5~2.5 mm. Of course, in the process of manufacturing the antenna system, the spacing between adjacent strip protrusions 212 can be adjusted according to the number of strip protrusions 212 and the beam width of the antenna body 120. The embodiment of the present application does not impose specific restrictions on this.

[0040] In another optional embodiment, the number of strip protrusions 212 of each wave-transmitting unit 210 may be one, or the number of strip protrusions 212 of at least one wave-transmitting unit 210 is at least two, including a third strip protrusion 212c and a fourth strip protrusion 212d. In the thickness direction of the substrate 110, the orthographic projection of the third strip protrusion 212c and the orthographic projection of the fourth strip protrusion 212d are respectively located on opposite sides of the same antenna body 120, that is, multiple strip protrusions 212 are evenly distributed on opposite sides of the same antenna body 120, which can enable the beam of the antenna body 120 to pass through the wave-transmitting unit 210 in a large range, thereby increasing the beam width of the antenna system, and at the same time can improve the symmetry of the radiation pattern of the antenna system in the plane where the cross section of the strip protrusion 212 is located. It should be noted that one of the third strip-shaped protrusion 212c and the fourth strip-shaped protrusion 212d in this solution may be the first strip-shaped protrusion 212a or the second strip-shaped protrusion 212b described above.

[0041] In a further optional embodiment, in the thickness direction of the substrate 110, there is a first distance between the orthographic projection of the third strip protrusion 212c and the orthographic projection of the antenna body 120, and there is a second distance between the orthographic projection of the fourth strip protrusion 212d and the orthographic projection of the antenna body 120. The first distance may be less than or greater than the second distance, or, optionally, the first distance is equal to the second distance, that is, in the thickness direction of the substrate 110, the orthographic projection of the third strip protrusion 212c and the orthographic projection of the fourth strip protrusion 212d are symmetrically arranged with respect to the orthographic projection of the antenna body 120, which can further enhance the symmetry of the radiation pattern of the antenna system in the plane where the cross section of the strip protrusion 212 is located.

[0042] Optionally, the length, width and height of the third strip protrusion 212 c and the length, width and height of the fourth strip protrusion 212 d may be equal to better improve the symmetry of the radiation pattern of the antenna system in the plane where the cross section of the strip protrusion 212 is located.

[0043] Optionally, the number of at least one of the third strip protrusions 212c and the fourth strip protrusions 212d can be at least two, the height of each third strip protrusion 212c can gradually increase in the direction away from the fourth strip protrusion 212d, and the height of each fourth strip protrusion 212d can gradually increase in the direction away from the third strip protrusion 212c, thereby further widening the beam width of the antenna system and thereby increasing the radiation range of the antenna system.

[0044] In another optional embodiment, a side of the third strip protrusion 212c facing away from the fourth strip protrusion 212d is a first side, and a side of the fourth strip protrusion 212d facing away from the third strip protrusion 212c is a second side, and the distance between the first side and the second side may be smaller than the beam width of the antenna body 120 in the width direction of the third strip protrusion 212c; or, the distance between the first side and the second side is greater than or equal to the beam width of the antenna body 120 in the width direction of the third strip protrusion 212c, that is, in the width direction of the third strip protrusion 212c, the distance between the first side and the second side is greater than or equal to the beam width of the antenna body 120, which is beneficial to further broaden the beam width of the electromagnetic waves passing through the antenna cover 200, thereby improving the antenna performance of the antenna system; at the same time, the working efficiency of the antenna body 120 can be improved.

[0045] In an optional embodiment, in the width direction of the strip protrusion 212, the heights of the strip protrusion 212 at various locations may not be equal. In this case, the side of the strip protrusion 212 facing the substrate 110 may be an arc-shaped surface, a wavy surface, a serrated surface, etc.; or, in the width direction of the strip protrusion 212, the heights of the strip protrusion 212 at various locations are equal, that is, the side of the strip protrusion 212 facing the substrate 110 is a plane, and the strip protrusion 212 is a quadrangular prism structure. In this case, the phase length of the electromagnetic wave transmitted between the center of the antenna body 120 and the strip protrusion 212 is basically the same, which is conducive to further reducing the reflectivity of the strip protrusion 212 to this part of the electromagnetic wave, thereby improving the performance of the antenna system; and, the strip protrusion 212 of this structure is easy to manufacture, which is conducive to reducing the difficulty of manufacturing the antenna cover 200.

[0046] Optionally, the width of the strip protrusion 212 is 1.5-2.5 mm, in which case the strip protrusion 212 has a better effect of adjusting the phase length of the electromagnetic wave. Of course, it can also be selected according to actual needs, and the embodiment of the present application does not impose specific restrictions on this.

[0047] In an optional embodiment, the plane where the antenna body 120 is located is the first plane, and the antenna body 120 is adjacent to the middle part of the orthographic projection of the strip protrusion 212 in the first plane, that is, in the width direction of the strip protrusion 212, the antenna body 120 and the middle part of the orthographic projection of the strip protrusion 212 in the first plane are arranged side by side; in other words, in the length direction of the strip protrusion 212, the lengths of the parts of the orthographic projection of the strip protrusion 212 in the first plane located on the opposite sides of the antenna body 120 are substantially equal. This scheme adopts such a setting method, which is conducive to improving the symmetry of the directional pattern of the antenna system in the length direction of the strip protrusion 212. Of course, in the length direction of the strip protrusion 212, the lengths of the parts of the orthographic projection of the strip protrusion 212 in the first plane located on the opposite sides of the antenna body 120 may also be unequal, and this can be selected according to actual needs.

[0048] Optionally, the length of the strip-shaped protrusion 212 may be equal to the dimension of the main wave-transmitting portion 211 in the length direction of the strip-shaped protrusion 212 , so as to facilitate the processing and manufacturing of the antenna cover 200 .

[0049] In another optional embodiment, the antenna cover 200 also includes a first side wave-transmitting portion 220 and a second side wave-transmitting portion 230 that are relatively arranged, each wave-transmitting unit 210 is arranged between the first side wave-transmitting portion 220 and the second side wave-transmitting portion 230, the first side wave-transmitting portion 220 and the second side wave-transmitting portion 230 are both parallel to the strip-shaped protrusion 212, and at least two antenna bodies 120 include a radiator 121 and a receiver 122, the radiator 121 is used to radiate electromagnetic waves to the outside world, and the receiver 122 is used to receive electromagnetic waves from the outside world, the radiator 121 is close to the first side wave-transmitting portion 220, and the receiver 122 is close to the second side wave-transmitting portion 230. Of course, the radiator 121 can also be close to the second side wave-transmitting portion 230, and the receiver 122 can be close to the first side wave-transmitting portion 220.

[0050] Optionally, the distance between the first side wave-transmitting portion 220 and the center of the radiator 121 and the distance between the second side wave-transmitting portion 230 and the center of the receiver 122 are both integer multiples of half an air wavelength. In this solution, both the first side wave-transparent portion 220 and the second side wave-transparent portion 230 can play a protective role to protect each strip protrusion 212; and, when the first side wave-transparent portion 220 is located within the beam coverage range of the radiator 121, its function can be the same as that of the strip protrusion 212 corresponding to the radiator 121, so that the phases of the electromagnetic waves transmitted to the first side wave-transparent portion 220 and the electromagnetic waves transmitted to the main wave-transparent portion 211 and the strip protrusion 212 corresponding to the radiator 121 are equal (including completely equal and approximately equal); when the second side wave-transparent portion 230 is located within the beam coverage range of the receiver 122, its function can be the same as that of the strip protrusion 212 corresponding to the receiver 122, so that the phases of the electromagnetic waves transmitted to the second side wave-transparent portion 230 and the electromagnetic waves transmitted to the main wave-transparent portion 211 and the strip protrusion 212 corresponding to the receiver 122 are equal (including completely equal and approximately equal). Therefore, the first side wave-transmitting portion 220 and the second side wave-transmitting portion 230 in this solution both have the effect of serving two purposes. Of course, the first side wave-transmitting portion 220 and the second side wave-transmitting portion 230 may not be provided.

[0051] Optionally, each antenna body 120 may include at least two antenna units and a connecting portion connecting adjacent antenna units, and the antenna units are arranged in sequence and spaced apart in a direction parallel to the length direction of the strip protrusion 212. The antenna body 120 adopting such a structure can increase its efficiency in radiating and receiving electromagnetic waves, thereby improving the antenna performance of the antenna system.

[0052] Based on the antenna system disclosed in the embodiments of the present application, the embodiments of the present application further provide a camera, which includes a housing 310, a camera module 320 and the antenna system 330 described in any of the above embodiments, and the camera module 320 and the antenna system 330 are both arranged in the housing 310.

[0053] In an optional embodiment, the antenna system 330 is a radar antenna system, and the corresponding camera can be a radar video integrated machine. The housing 310 is provided with a shooting window 311, and the light incident surface of the camera module 320 faces the shooting window 311. The shooting window 311 and the antenna cover 200 are arranged at intervals in the vertical direction. Optionally, the shooting window 311 can be located above the antenna cover 200 or below the antenna cover 200. The embodiment of the present application does not impose specific restrictions on this. The length direction of the strip protrusion 212 is parallel to the extension direction of the main wave-transmitting portion 211 to the shooting window 311, so as to widen the beam width of the antenna system 330 in the width direction of the camera. Since the antenna system 330 of the current camera is affected by the antenna cover 200, its monitoring range is smaller than the shooting range of the camera module 320. Therefore, this solution widens the beam width of the antenna system 330 in the width direction of the camera to make the shooting range and the monitoring range more compatible, thereby improving the monitoring accuracy of the camera. Of course, the length direction of the strip protrusion 212 can also be parallel to the width direction of the camera. In this case, the beam width of the antenna system 330 in the extension direction from the shooting window 311 to the main wave-transmitting portion 211 of the antenna cover 200 can be widened.

[0054] In a further optional embodiment, the detection field of view of the antenna system 330 covers the shooting field of view of the camera module 320, that is, the detection field of view angle of the antenna system 330 is greater than or equal to the shooting field of view angle of the camera module 320, and the shooting field of view angle of the camera module 320 is within the detection field of view angle of the antenna system 330, thereby further improving the compatibility of the shooting field of view angle of the camera module 320 and the detection field of view angle of the antenna system 330, so that the detection field of view angle of the antenna system 330 and the shooting field of view angle of the camera module 320 are combined into one, so as to further improve the monitoring accuracy of the camera.

[0055] Optionally, the horizontal beam width of the antenna system 330 is 138°, where the horizontal beam width refers to the beam width in the width direction of the camera; the vertical beam width of the antenna system 330 is 36°, where the vertical beam width refers to the beam width in the extension direction of the shooting window 311 to the main wave-transmitting portion 211 of the antenna cover 200. It should be noted that at least one of the above-mentioned horizontal beam width of 138° and the vertical beam width of 36° can be adjusted according to actual needs, and the embodiment of the present application does not impose specific restrictions on this.

[0056] Based on the camera disclosed in the embodiment of the present application, when the diameter of the incident surface of the camera module 320 is 2.8 mm and the field of view angle is 95°, the height of the first strip protrusion 212a is 1 mm and the width is 2 mm, the height of the second strip protrusion 212b is 4 mm and the width is 2 mm, and the spacing between the first strip protrusion 212a and the second strip protrusion 212b is 2 mm; the height of the third strip protrusion 212c and the fourth strip protrusion 212d are both 1 mm and 2 mm in width.

[0057] refer to Figure 7 It can be seen that the horizontal beam width of the antenna system 330 of the existing camera is 65.8°, and the vertical beam width is 30°.

[0058] refer to Figure 8 It can be seen that the antenna system 330 of the camera disclosed in the embodiment of the present application has a horizontal beam width of 138° and a vertical beam width of 36°.

[0059] It can be seen that the antenna system 330 of the camera disclosed in the embodiment of the present application effectively improves the beam width of the antenna system 330, increases the coverage range of electromagnetic waves, and expands the large-angle detection capability of the antenna system 330.

[0060] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An antenna system, applied to a camera, characterized in that: It comprises an antenna (100) and a radome (200) which are arranged relatively to each other, The antenna (100) comprises a substrate (110) and at least two antenna bodies (120) arranged in sequence and spaced apart from each other, and each of the antenna bodies (120) is arranged on a side of the substrate (110) facing the radome (200); The radome (200) comprises at least two sequentially connected wave-transmitting units (210), each of the wave-transmitting units (210) being arranged in a one-to-one correspondence with each of the antenna bodies (120), each of the wave-transmitting units (210) comprising a main wave-transmitting portion (211) and a strip-shaped protrusion (212), the strip-shaped protrusion (212) being arranged on a side of the main wave-transmitting portion (211) facing the antenna body (120), the distance between the strip-shaped protrusion (212) and the center of the antenna body (120) being an integer multiple of half an air wavelength, and in the thickness direction of the substrate (110), the orthographic projection of the strip-shaped protrusion (212) is staggered with the orthographic projection of the antenna body (120), and at least partially overlaps with the orthographic projection of the beam of the antenna body (120), and the phase of the beam of the antenna body (120) transmitted to each interface of the wave-transmitting unit (210) is equal; The number of the strip-shaped protrusions (212) of at least one of the wave-transmitting units (210) is at least two, the at least two strip-shaped protrusions (212) comprising a first strip-shaped protrusion (212a) and a second strip-shaped protrusion (212b) which are arranged at intervals, the height of the second strip-shaped protrusion (212b) being greater than the height of the first strip-shaped protrusion (212a), and in the thickness direction of the substrate (110), the orthographic projection of the second strip-shaped protrusion (212b) and the orthographic projection of the first strip-shaped protrusion (212a) are located on the same side of the orthographic projection of the same antenna body (120), and the orthographic projection of the first strip-shaped protrusion (212a) is located between the orthographic projection of the second strip-shaped protrusion (212b) and the orthographic projection of the antenna body (120).

2. The antenna system according to claim 1, characterized in that In the arrangement direction of at least two of the antenna bodies (120), two opposite sides of the same antenna body (120) are respectively provided with a third strip protrusion (212c) and a fourth strip protrusion (212d); in the thickness direction of the substrate (110), an orthographic projection of the third strip protrusion (212c) and an orthographic projection of the fourth strip protrusion (212d) are respectively located on two opposite sides of the same antenna body (120).

3. The antenna system according to claim 2, characterized in that: In the thickness direction of the substrate (110), there is a first distance between the orthographic projection of the third strip-shaped protrusion (212c) and the orthographic projection of the antenna body (120), and there is a second distance between the orthographic projection of the fourth strip-shaped protrusion (212d) and the orthographic projection of the antenna body (120), and the first distance is equal to the second distance.

4. The antenna system according to claim 2, characterized in that A side of the third strip protrusion (212c) facing away from the fourth strip protrusion (212d) is a first side, a side of the fourth strip protrusion (212d) facing away from the third strip protrusion (212c) is a second side, and a distance between the first side and the second side is greater than or equal to a beam width of the antenna body (120) in a width direction of the third strip protrusion (212c).

5. The antenna system according to claim 1, characterized in that: In the width direction of the strip-shaped protrusion (212), the height of each part of the strip-shaped protrusion (212) is equal.

6. The antenna system according to claim 1, characterized in that The plane in which the antenna body (120) is located is a first plane, and the antenna body (120) is adjacent to a middle part of a positive projection of the strip-shaped protrusion (212) in the first plane.

7. The antenna system according to claim 1, characterized in that: The radome (200) further comprises a first side wave-transmitting portion (220) and a second side wave-transmitting portion (230) which are arranged opposite to each other, each of the wave-transmitting units (210) being arranged between the first side wave-transmitting portion (220) and the second side wave-transmitting portion (230), and the first side wave-transmitting portion (220) and the second side wave-transmitting portion (230) being parallel to the strip-shaped protrusion (212). The at least two antenna bodies (120) comprise a radiator (121) and a receiver (122), wherein the radiator (121) is close to the first side wave-transmitting portion (220), and the receiver (122) is close to the second side wave-transmitting portion (230), and the distance between the first side wave-transmitting portion (220) and the center of the radiator (121) and the distance between the second side wave-transmitting portion (230) and the center of the receiver (122) are both integer multiples of half an air wavelength.

8. A camera, characterized in that: It comprises a housing (310), a camera module (320), and an antenna system (330) according to any one of claims 1 to 7, wherein the camera module (320) and the antenna system (330) are both arranged in the housing (310).

9. The camera according to claim 8, characterized in that The antenna system (330) is a radar antenna system, the housing (310) is provided with a shooting window (311), the light incident surface of the camera module (320) faces the shooting window (311), the shooting window (311) and the antenna cover (200) are arranged at intervals in the vertical direction, and the length direction of the strip-shaped protrusion (212) is parallel to the extension direction of the main wave-transmitting portion (211) towards the shooting window (311).

10. The camera according to claim 9, characterized in that The detection field of view of the antenna system (330) covers the shooting field of view of the camera module (320), the horizontal beam width of the antenna system (330) is 138°, and the vertical beam width of the antenna system (330) is 36°.

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