Antenna device and missile-borne device

Abstract

The utility model relates to an antenna device and a missile-borne device. The antenna device comprises an antenna reflecting plate which is provided with a reflecting surface; the antenna structure is arranged on the reflecting surface; the plurality of first antennas are arranged on the reflecting surface and are arranged at intervals along the circumferential direction of the antenna structure; the reflecting surface comprises a plurality of first sub-reflecting surfaces and a second sub-reflecting surface, the plurality of first sub-reflecting surfaces are arranged along the circumferential direction of the second sub-reflecting surface, the plurality of first sub-reflecting surfaces are arranged corresponding to the plurality of first antennas, the first antennas are located on the corresponding first sub-reflecting surfaces, and the antenna structure is located on the second sub-reflecting surface; and the first sub-reflecting surface and the second sub-reflecting surface are obliquely intersected. Therefore, according to the antenna device and the missile-borne device provided by the invention, the anti-interference capability of the antenna device can be improved.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to antenna devices and missile-borne devices. Background Technology

[0002] With the development of satellite navigation technology in recent years and the successful networking of BeiDou-3, BeiDou navigation technology has been widely used in both military and civilian fields.

[0003] In related technologies, array antennas remain the primary form for achieving anti-jamming capabilities in navigation antennas, with microstrip antennas still dominating conventional array configurations. A common practice in deploying anti-jamming array antennas using microstrip antennas is to set the array spacing to half the air wavelength of the corresponding frequency. However, the anti-jamming capability of these array antennas still needs improvement. Utility Model Content

[0004] Therefore, it is necessary to provide an antenna device and a missile-borne device that can improve the anti-interference capability of the antenna device.

[0005] In a first aspect, embodiments of this application provide an antenna device, the antenna device comprising:

[0006] Antenna reflector, equipped with a reflective surface;

[0007] The antenna structure is positioned on the reflector surface;

[0008] Multiple first antennas are disposed on the reflector surface and arranged at intervals along the circumference of the antenna structure;

[0009] The reflector includes multiple first sub-reflectors and second sub-reflectors. The multiple first sub-reflectors are arranged circumferentially along the second sub-reflector. The multiple first sub-reflectors are correspondingly set with multiple first antennas. The first antenna is located on the corresponding first sub-reflector, and the antenna structure is located on the second sub-reflector. The first sub-reflectors and the second sub-reflector intersect at an angle.

[0010] The antenna device provided in this application provides an example of an antenna device that, by tilting the first sub-reflector and the second sub-reflector together so that the first and second sub-reflectors are located on different surfaces and form a certain angle between them, ensures that the area occupied by the first and second sub-reflectors on the horizontal plane is small, while increasing the distance between the first antenna on the first sub-reflector and the antenna structure on the second sub-reflector. This weakens the coupling between the first antenna and the antenna structure, improves the isolation between the first antenna and the antenna structure, and thus enhances the anti-interference performance of the antenna device.

[0011] In one embodiment, two adjacent first sub-reflective surfaces intersect at an angle.

[0012] In one of the embodiments, the antenna device comprises a plurality of isolation members, the plurality of isolation members are arranged along the circumference of the antenna structure;

[0013] The plurality of isolation members and the plurality of first antenna pairs are correspondingly arranged, and the isolation member is located between the corresponding first antenna and the antenna structure.

[0014] In one of the embodiments, the first antenna comprises a first circuit board and a first antenna body arranged away from the antenna reflector plate;

[0015] In the corresponding isolation member and the first antenna, the isolation member comprises a first isolation part and a second isolation part connected to each other, the first isolation part is connected to the side of the first circuit board away from the reflector plate, and the second isolation part is located on the side of the first isolation part away from the reflector plate;

[0016] In the thickness direction of the first circuit board, the area of the orthographic projection of the first isolation part on the first circuit board is greater than the area of the orthographic projection of the second isolation part on the first circuit board; and / or,

[0017] The first isolation part comprises a first sub-isolation part and two second sub-isolation parts, the first sub-isolation part is connected between the two second sub-isolation parts, the first sub-isolation part protrudes from the second isolation part towards the direction close to the antenna structure, the second sub-isolation part protrudes from the second isolation part away from the antenna structure, and at least part of the first antenna body is located between the two second sub-isolation parts; and / or,

[0018] In the thickness direction of the antenna reflector plate, the size of the isolation member is greater than the size of the first antenna and smaller than the size of the antenna structure.

[0019] In one of the embodiments, the antenna device comprises a protective cover, the antenna structure comprises a second antenna, and the second antenna comprises a second circuit board and a second antenna body arranged away from the antenna reflector plate;

[0020] At least part of the second antenna body is a flexible member, and the protective cover is sleeved on the outside of the second antenna body.

[0021] In one of the embodiments, the protective cover comprises a cover part and a mounting part, the cover part is sleeved on the outer periphery of the second antenna body, the mounting part is located on the side of the cover part facing the antenna reflector plate, and protrudes from the cover part away from the second antenna body; and / or,

[0022] The antenna structure comprises a third antenna, the third antenna is located between the second sub-reflector and the second antenna; at least one of the first antenna and the third antenna is a microstrip antenna, and the second antenna is a spiral antenna; and / or,

[0023] The second antenna body is in a cylindrical shape.

[0024] In one of the embodiments, the antenna reflector is provided with a plurality of first and second avoiding grooves on the side facing the antenna structure, the plurality of first avoiding grooves are provided correspondingly with the plurality of first antennas, in the corresponding first avoiding groove and first antenna, the first antenna covers the slot of the first avoiding groove, and the first sub-reflector is annularly arranged outside the slot of the first avoiding groove; the antenna structure covers the slot of the second avoiding groove, and the second sub-reflector is annularly arranged outside the slot of the second avoiding groove.

[0025] In one of the embodiments, the second sub-reflector is provided with a supporting protrusion between the second sub-reflector and the antenna structure, and at least part of the outer periphery of the slot of the second avoiding groove;

[0026] In the direction of the groove depth of the first avoiding groove, the size of the first avoiding groove is a first value, in the direction of the groove depth of the second avoiding groove, the sum of the size of the supporting protrusion and the size of the second avoiding groove is a second value, and the first value is equal to the second value.

[0027] In one of the embodiments, the supporting protrusion is provided with a positioning opening, the positioning opening penetrates the supporting protrusion in the direction from the center to the edge of the second avoiding groove; the positioning opening includes a first side and a second side oppositely and spacedly arranged, the first side includes a first sub-face and a second sub-face arranged in the direction away from the second avoiding groove, the positioning opening includes a first sub-positioning opening and a second sub-positioning opening, the first sub-positioning opening is located between the first sub-face and the second side, and the second sub-positioning opening is located between the second sub-face and the second side.

[0028] The antenna structure is provided with a positioning protrusion on the side facing the antenna reflector, the positioning protrusion is located in the first sub-positioning opening and is in contact with the first sub-face and the second side;

[0029] The size of the first sub-positioning opening and the positioning protrusion in the direction from the first side to the second side gradually decreases in the direction from the positioning opening to the second avoiding groove; and / or,

[0030] The end of the second side away from the second avoiding groove is arranged in the direction away from the center of the positioning opening relative to the end close to the second avoiding groove, and is configured as a guide surface; in the direction from the first side to the second side, the second sub-face is farther away from the center of the positioning opening relative to the first sub-face, and the minimum distance between the second sub-face and the second side is greater than the maximum size of the positioning protrusion; and / or,

[0031] In the direction of the groove depth of the second avoiding groove, the size of the first sub-positioning opening is greater than the size of the second sub-positioning opening.

[0032] In the second aspect, the embodiments of the present application provide an antenna device carried by a missile. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A structure schematic diagram of an antenna device provided by an embodiment of the present application.

[0034] Figure 2 A split structure schematic diagram of an antenna device provided by an embodiment of the present application.

[0035] Figure 3 A structure schematic diagram of an antenna reflector provided by an embodiment of the present application.

[0036] Figure 4 A top view of a local antenna reflector and a support protrusion provided by an embodiment of the present application.

[0037] Explanation of reference signs:

[0038] 100, antenna device; 101, antenna structure; 110, first antenna; 120, second antenna; 130, third antenna; 111, first circuit board; 112, second circuit board; 113, third circuit board; 121, first antenna body; 122, second antenna body; 123, third antenna body; 140, antenna reflector; 141, reflecting surface; 1411, first sub-reflector; 1412, second sub-reflector; 1421, first avoiding slot; 1422, second avoiding slot; 150, isolation piece; 151, first isolation part; 1511, first sub-isolation part; 1512, second sub-isolation part; 152, second isolation part; 160, protective cover; 161, cover setting part; 162, mounting part; 170, support protrusion; 171, first side surface; 1711, first sub-surface; 1712, second sub-surface; 1713, third sub-surface; 172, second side surface; 173, positioning opening; 1731, first sub-positioning opening; 1732, second sub-positioning opening. DETAILED DESCRIPTION

[0039] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0040] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0041] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0042] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0043] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] It is to be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions, if used, are used for explanation only and not to limit the application.

[0045] In the related art, a highly integrated requirement is proposed for a Beidou antenna, and therefore a small antenna reflector plate emerges. The array antenna includes a center array element and a plurality of peripheral array elements, and the plurality of peripheral array elements are arranged around the outer periphery of the center array element. Due to the limitation of the size of the antenna reflector plate, the distance between two adjacent array elements in the horizontal direction cannot be increased, and the radiation surfaces of the center array element and the peripheral array elements are in the same horizontal plane, which leads to a small distance between the radiation surfaces of the two adjacent array elements, strong current coupling between the radiation surfaces of the two adjacent array elements, and mutual radiation cancellation between the two adjacent array elements, thereby reducing the gain of the array antenna. In addition, the coupling degree between the two adjacent array elements becomes stronger as the distance between the two adjacent array elements becomes smaller, and a large coupling degree between the two adjacent array elements also reduces the anti-interference ability.

[0046] To solve the above problems, the embodiments of the present application provide an antenna device and a missile-borne device, which can improve the anti-interference ability of the antenna device.

[0047] The following will be combined with Figures 1-4 The antenna device and the missile-borne device provided by the embodiments of the present application are described.

[0048] Referring to Figure 1 The embodiments of the present application provide an antenna device 100, which includes an antenna reflector plate 140. The antenna reflector plate 140 can include oppositely arranged reflector surfaces 141. The reflector surface 141 can refer to a part of the antenna reflector plate 140 for reflecting radio waves.

[0049] Referring to Figure 1, the antenna device 100 comprises an antenna structure 101 and a plurality of first antennas 110, the antenna structure 101 and the plurality of first antennas 110 are both arranged on a reflecting surface 141, and the plurality of first antennas 110 are arranged in a circumferential direction of the antenna structure 101. The reflecting surface 141 comprises a plurality of first sub-reflection surfaces 1411 and a second sub-reflection surface 1412, the plurality of first sub-reflection surfaces 1411 are arranged in a circumferential direction of the second sub-reflection surface 1412, the plurality of first sub-reflection surfaces 1411 are arranged correspondingly to the plurality of first antennas 110, the first antennas 110 are located on the corresponding first sub-reflection surfaces 1411, and the antenna structure 101 is located on the second sub-reflection surface 1412. The first sub-reflection surface 1411 and the second sub-reflection surface 1412 are obliquely intersected, so that, compared with arranging the first sub-reflection surface 1411 and the second sub-reflection surface 1412 on the same horizontal plane, the application makes the first sub-reflection surface 1411 and the second sub-reflection surface 1412 located on different planes by obliquely intersecting the first sub-reflection surface 1411 and the second sub-reflection surface 1412, separately preparing the first sub-reflection surface 1411 with different extension directions on the outer periphery of the second sub-reflection surface 1412, and making the first sub-reflection surface 1411 and the second sub-reflection surface 1412 form a certain angle, so as to ensure that the first sub-reflection surface 1411 and the second sub-reflection surface 1412 occupy a smaller area of the horizontal plane, and at the same time, increase the distance between the first antennas 110 on the first sub-reflection surface 1411 and the antenna structure 101 on the second sub-reflection surface 1412, thereby weakening the coupling between the first antennas 110 and the antenna structure 101, improving the isolation between the first antennas 110 and the antenna structure 101, and thus improving the anti-interference performance of the antenna device 100.

[0050] In some embodiments, referring to Figure 1 , the first sub-reflection surfaces 1411 are obliquely intersected, so that the first sub-reflection surfaces 1411 are located on different planes, and form a certain angle between the first sub-reflection surfaces 1411, so as to ensure that the first sub-reflection surfaces 1411 occupy a smaller area of the horizontal plane, and at the same time, increase the distance between the first antennas 110 on the first sub-reflection surfaces 1411, weaken the coupling between the first antennas 110, improve the isolation between the first antennas 110, and thus improve the anti-interference performance of the antenna device 100.

[0051] In some embodiments, referring to Figure 1The antenna device 100 comprises a plurality of isolation members 150, which are arranged along the circumference of the antenna structure 101. The plurality of isolation members 150 and the plurality of first antennas 110 are arranged correspondingly, and the isolation member 150 is arranged between the corresponding first antenna 110 and the antenna structure 101. In this way, the isolation member 150 can further reduce the coupling between the corresponding first antenna 110 and the antenna structure 101, improve the isolation between the corresponding first antenna 110 and the antenna structure 101, and thus improve the anti-interference performance of the antenna device 100.

[0052] In some embodiments, referring to Figure 2 The first antenna 110 comprises a first circuit board 111 and a first antenna body 121 arranged away from the antenna reflector plate 140, and the isolation member 150 is arranged on the side of the first circuit board 111 away from the antenna reflector plate 140. In this way, the isolation member 150 and the first antenna 110 can be assembled into a whole first, and then mounted on the antenna reflector plate 140, which is beneficial to improve the assembly efficiency of the antenna device 100. In addition, mounting the isolation member 150 on the first circuit board 111 instead of directly mounting it on the antenna reflector plate 140 is beneficial to reduce the area occupied by the isolation member 150 and the first circuit board 111 as a whole on the antenna reflector plate 140, and is beneficial to improve the integration of the antenna device 100.

[0053] In some embodiments, referring to Figure 2 In the corresponding isolation member 150 and the first antenna 110, the isolation member 150 comprises a first isolation part 151 and a second isolation part 152 connected to each other. The first isolation part 151 is connected to the side of the first circuit board 111 away from the reflecting surface 141, and the second isolation part 152 is located on the side of the first isolation part 151 away from the reflecting surface 141. In the thickness direction of the first circuit board 111 (i.e., the direction perpendicular to the corresponding first sub-reflector surface 1411), the area of the orthographic projection of the first isolation part 151 on the first circuit board 111 is greater than the area of the orthographic projection of the second isolation part 152 on the first circuit board 111. In this way, the first isolation part 151 has a larger area, which is beneficial to improve the connection stability between the isolation member 150 and the first circuit board 111. In addition, the second isolation part 152 occupies a smaller area of the first circuit board 111, which can reduce the influence on the layout of the first antenna body 121. At this time, the size of the second isolation part 152 in the thickness direction of the first circuit board 111 can be set larger to improve the isolation effect of the isolation member 150.

[0054] In some embodiments, referring to Figure 2In the corresponding isolation piece 150 and the first antenna 110, the first isolation part 151 includes a first sub-isolation part 1511 and two second sub-isolation parts 1512, the first sub-isolation part 1511 is connected between the two second sub-isolation parts 1512, the first sub-isolation part 1511 protrudes from the second isolation part 152 towards the direction close to the antenna structure 101, and the second sub-isolation part 1512 protrudes from the second isolation part 152 away from the antenna structure 101. In this way, by arranging the first sub-isolation part 1511 and the second sub-isolation part 1512 on both sides of the second isolation part 152 respectively, the two sides of the second isolation part 152 can be supported, which is beneficial to prevent the second isolation part 152 from tilting to one side after being bumped. In addition, at least part of the first antenna body 121 is located between the two second sub-isolation parts 1512, so that the second sub-isolation part 1512 is located between the two adjacent first antennas 110, which can reduce the coupling between the two adjacent first antennas 110, and is also beneficial to reduce the total area of the first circuit board 111 occupied by the two second sub-isolation parts 1512 and the first antenna body 121.

[0055] In some embodiments, referring to Figure 1 and Figure 2 , along the thickness direction of the antenna reflecting plate 140, the size of the isolation piece 150 is greater than the size of the first antenna 110 and less than the size of the antenna structure 101. In this way, by the size of the isolation piece 150 being greater than the size of the first antenna 110, the isolation piece 150 can better reduce the coupling between the first antenna 110 and the antenna structure 101. In addition, the size of the isolation piece 150 is less than the size of the antenna structure 101, which can avoid the isolation piece 150 excessively isolating the antenna structure 101, resulting in the signal of the antenna structure 101 not being easily transmitted outward.

[0056] In some embodiments, referring to Figure 2 , the antenna device 100 includes a protective cover 160, and the antenna structure 101 includes a second antenna 120. The second antenna 120 includes a second circuit board 112 and a second antenna body 122. The second antenna body 122 is in a cylindrical shape, and the second antenna body 122 is located on the side of the second circuit board 112 away from the antenna reflecting plate 140. At least part of the second antenna body 122 is a flexible piece. For example, the second dielectric piece of the second antenna body 122 can be a flexible piece, so that the second dielectric piece is easier to form a cylindrical shape (for example, a circular cylinder), has a lighter weight, and is easier to process and design. The protective cover 160 is sleeved on the outside of the second antenna body 122. In this way, the protective cover 160 can protect the second antenna body 122 and prevent the second antenna body 122 from being deformed or damaged due to being bumped.

[0057] In some embodiments, referring to Figure 2The protective cover 160 can also be sleeved on the outer side of the second circuit board 112, so as to better protect the second antenna 120.

[0058] In some embodiments, referring to Figure 2 The protective cover 160 includes a cover portion 161 and a mounting portion 162. The cover portion 161 is sleeved on the outer side of the second antenna body 122 and / or the second circuit board 112. The mounting portion 162 is located on the side of the cover portion 161 facing the antenna reflector 140, and the mounting portion 162 protrudes from the cover portion 161 in a direction away from the second antenna body 122. For example, the mounting portion 162 can be connected to the third antenna 130. In this way, by providing the mounting portion 162, the connection area between the protective cover 160 and the third antenna 130 can be increased, thereby improving the connection stability between the protective cover 160 and the third antenna 130.

[0059] In some embodiments, referring to Figure 2 The antenna structure 101 includes a third antenna 130 located between the second sub-reflector 1412 and the second antenna 120. In this way, by providing the third antenna 130, the second antenna 120 can be elevated, and the distance between the second antenna 120 and the first antenna 110 can be increased, thereby reducing the coupling between the second antenna 120 and the first antenna 110.

[0060] In some embodiments, at least one of the first antenna 110 and the third antenna 130 is a microstrip antenna.

[0061] In some embodiments, the first antenna body 121 can include a first dielectric member and a first radiating member. The first radiating member is located on the side of the first dielectric member away from the first circuit board 111. The first radiating member is used to receive a first feeding signal through the first antenna feed pin, so as to transmit a first satellite positioning signal under the excitation of the first feeding signal.

[0062] In some embodiments, the first antenna feed pin is welded on the first circuit board 111 after passing through the first dielectric member. For example, the first antenna feed pin is welded on the feeding network of the first circuit board 111 after passing through the first dielectric layer.

[0063] For example, the material of the first dielectric member can be a high dielectric constant material, which is beneficial to reducing the size of the first antenna 110, thereby facilitating the arrangement of more first antennas 110 on the edge and improving the integration of the antenna device 100. For example, the high dielectric constant material can be a ceramic material, which has the characteristics of high and consistent dielectric constant, stable low loss, high mechanical strength, good wear resistance, good temperature stability, etc.

[0064] For example, the first radiating member can be a radiating patch.

[0065] For example, any two first antennas 110 can be the same antenna.

[0066] For example, the size of the first antenna 110 can be 20mm*20mm*6mm.

[0067] In some embodiments, the third antenna 130 includes a third circuit board 113 and a third antenna body 123 arranged away from the antenna reflector 140. The protective cover 160 is arranged on the side of the third antenna body 123 away from the antenna reflector 140.

[0068] In some embodiments, the third antenna body 123 can include a third dielectric member and a third radiating element. The third radiating element is arranged on the side of the third dielectric member away from the third circuit board 113.

[0069] In some embodiments, the third radiating element is configured to receive a third feeding signal through a third antenna feed pin, and transmit a third satellite positioning signal under the excitation of the third feeding signal.

[0070] In some embodiments, the third antenna feed pin is welded on the third circuit board 113 after passing through the third dielectric member. For example, the third antenna feed pin is welded on the feeding network of the third circuit board 113 after passing through the third dielectric layer.

[0071] For example, the third dielectric member can be a high-frequency board material. The dielectric constant of the third dielectric member can be smaller than the dielectric constant of the first dielectric member, and the third dielectric member can not use a material with high dielectric constant. When the third dielectric member uses a high-frequency board material, and the weight of the third dielectric member is lighter than the ceramic first dielectric member, it is beneficial to the lightweight of the third antenna 130.

[0072] For example, the third radiating element can be a radiating patch.

[0073] In some embodiments, the plating layer on the surface of the third dielectric member can be formed by gold plating, thereby facilitating the welding of the second antenna 120 to the third antenna 130, and facilitating the grounding and fixing of the second antenna 120.

[0074] For example, the size of the third antenna 130 can be 35mm*35mm*7mm.

[0075] In some embodiments, each of the first antennas 110 and the third antennas 130 adopts a double-feed-point design, and the two feed points of each of the first antennas 110 are equidistant from the geometric center of the first antenna 110, and the two feed points of each of the third antennas 130 are equidistant from the geometric center of the third antenna 130. The double-feed-point design can ensure the balance and symmetry of the first satellite positioning signal and the third satellite positioning signal, respectively, and can reduce the reflection and standing wave of the first satellite positioning signal and the third satellite positioning signal, respectively, to improve the energy transmission efficiency of the first satellite positioning signal and the third satellite positioning signal, respectively.

[0076] In some embodiments, the second antenna 120 is a spiral antenna. For example, the second antenna 120 is a printed four-arm spiral antenna.

[0077] For example, the second antenna body 122 includes a second dielectric member and a second radiating member, the second dielectric member is a cylinder, and the second radiating member is spirally wound on the second dielectric member.

[0078] For example, the second radiating member includes at least one radiating branch, and the radiating branch is printed on the second dielectric member (for example, the second dielectric member can be a flexible circuit board). For example, the number of the radiating branches can be four, so that the second antenna 120 is a four-arm spiral antenna. Each of the radiating branches is spirally wound on the second dielectric member and is used to receive the second feed signal to transmit the second satellite positioning signal under the excitation of the second feed signal. The radiating branch can be soldered on the second circuit board 112.

[0079] In some embodiments, the second antenna 120 further includes at least one matching branch, each of the matching branches is in communication with each of the radiating branches, and the distance between each of the matching branches and the radiating branch in communication with the matching branch satisfies a preset interval condition to achieve impedance matching. For example, the second antenna 120 is a four-arm spiral antenna, the four-arm spiral antenna includes four spiral radiating branches, has four feed points, and has one matching branch at each of the feed points, and the matching branch is grounded.

[0080] For example, the size of the second antenna body 122 can be Ф14.5mm*38mm.

[0081] For example, the number of the first antennas 110 can be one, two, three, five, seven, or any number greater than one. The number of the second antennas 120 and the third antennas 130 is one. For example, Figure 1 In some embodiments, the seven first antennas 110 are used as the peripheral antenna elements of the antenna device 100, and the antenna structure 101 is used as the central antenna element of the antenna device 100.

[0082] In some embodiments, the operating frequency band of the first antenna 110 and the second antenna 120 can be the same.

[0083] In some embodiments, the operating frequency band of the third antenna 130 can be different from the operating frequency band of the first antenna 110 and the second antenna 120. For example, the operating frequency band of the third antenna 130 can be greater than the operating frequency band of the first antenna 110 and the second antenna 120.

[0084] In the implementation where the first antenna 110 is a microstrip antenna and the second antenna 120 is a spiral antenna, compared with setting both the first antenna 110 and the second antenna 120 as microstrip antennas, by setting the second antenna 120 in the middle as a spiral antenna, changing the radiation mode of the second antenna 120, and changing the direction of the radiation current, the coupling degree between the second antenna 120 in the center and the first antenna 110 around can be reduced, the isolation degree can be improved, the antenna gain can be improved, the anti-interference performance of the whole machine can be improved, in addition, the low-elevation radiation gain of the antenna device 100 can be improved, and better low-elevation gain can be more conducive to improving the anti-interference ability of the missile device loaded with the antenna device 100 during flight.

[0085] In some embodiments, the antenna device 100 includes a first low-noise amplifier module, the first low-noise amplifier module is located on the side of the antenna reflector plate 140 away from the reflecting surface 141, and the first low-noise amplifier module is electrically connected with the first circuit board 111. For example, the first low-noise amplifier module and the first antenna 110 can be connected through a first connector.

[0086] In some embodiments, the antenna device 100 includes a second low-noise amplifier module, the second low-noise amplifier module is located on the side of the antenna reflector plate 140 away from the reflecting surface 141, and the second low-noise amplifier module is electrically connected with the second circuit board 112. For example, the second low-noise amplifier module and the second antenna 120 can be connected through a second connector.

[0087] In some embodiments, the antenna device 100 includes a third low-noise amplifier module, the third low-noise amplifier module is located on the side of the antenna reflector plate 140 away from the reflecting surface 141, and the third low-noise amplifier module is electrically connected with the third circuit board 113. For example, the third low-noise amplifier module and the third antenna 130 can be connected through a third connector.

[0088] In some embodiments, any one of the first circuit board 111, the second circuit board 112, and the third circuit board 113 can be a feed network board.

[0089] In some embodiments, the antenna structure 101 can be located at the center position of the antenna reflector plate 140. At least one of the second antenna 120 and the third antenna 130 can be located at the center position of the antenna reflector plate 140.

[0090] In some embodiments, the first circuit board 111, the second circuit board 112 and the third circuit board 113 are all implemented by 3dB quadrature hybrids. In the present embodiment, the feed network on the first circuit board 111, the feed network of the second circuit board 112 and the feed network of the third circuit board 113 are all implemented by 3dB quadrature hybrids. Since the 3dB quadrature hybrids can equally distribute the input signals to the output ports so that each output port obtains the same signal power, and the 3dB quadrature hybrids can also ensure that the phases of the signals of each output port are different by 90 degrees (i.e. quadrature), so as to ensure that each of the first antenna 110, the second antenna 120 and the third antenna 130 in the antenna device 100 can receive uniform signal power, thereby improving the anti-interference capability of the antenna device 100.

[0091] In some embodiments, the frequency bands of the first satellite positioning signal and the second satellite positioning signal are both the first preset frequency band, and the frequency band of the third satellite positioning signal is the second preset frequency band.

[0092] For example, the first preset frequency band covers the frequency range of the B3 frequency band, and the frequency range of the B3 frequency band is 1250.618MHz-1286.432MHz. Therefore, the first preset frequency band should at least cover 1250.618MHz-1286.432MHz. The frequency bands of the first satellite positioning signal and the second satellite positioning signal both satisfy the B3 frequency band, which can provide the antenna device 100 with higher positioning accuracy and stronger anti-interference capability.

[0093] For example, the second preset frequency band covers the frequency range of the B1 frequency band, and the frequency range of the B1 frequency band is 1559.052MHz-1591.788MHz. Therefore, the second preset frequency band should at least cover 1559.052MHz-1591.788MHz. The frequency band of the third satellite positioning signal satisfies the B1 frequency band, which can further provide the antenna device 100 with higher positioning accuracy, and the third satellite positioning signal transmitted by the third antenna 130 can play an auxiliary enhancement role in the antenna device 100.

[0094] In some embodiments, referring to Figure 2 and Figure 3The side of the antenna reflector plate 140 facing the antenna structure 101 is provided with a plurality of first avoiding grooves 1421 corresponding to the plurality of first antennas 110. In the corresponding first avoiding groove 1421 and first antenna 110, the first antenna 110 covers the slot of the first avoiding groove 1421, and the first sub-reflector surface 1411 is arranged around the outer periphery of the slot of the first avoiding groove 1421. In this way, the first avoiding groove 1421 can avoid the electronic components on the corresponding first circuit board 111. At least part of the electronic components on the first circuit board 111 are arranged on the side away from the first antenna body 121, which can prevent the first circuit board 111 from being too large due to the arrangement of the at least part of the electronic components and the first antenna body 121 on the same side of the first circuit board 111, and is conducive to reducing the area of the first circuit board 111.

[0095] In some embodiments, referring to Figure 2 and Figure 3 , the side of the antenna reflector plate 140 facing the antenna structure 101 is provided with a second avoiding groove 1422, and the antenna structure 101 covers the slot of the second avoiding groove 1422. The second sub-reflector surface 1412 is arranged around the outer periphery of the slot of the second avoiding groove 1422. In this way, the second avoiding groove 1422 can avoid the electronic components on the antenna structure 101. For example, the second avoiding groove 1422 can avoid the electronic components on the third circuit board 113.

[0096] In some embodiments, referring to Figure 2 and Figure 4 , the second sub-reflector surface 1412 is provided with a support protrusion 170, which is located between the second sub-reflector surface 1412 and the antenna structure 101, and the support protrusion 170 is located at least part of the outer periphery of the slot of the second avoiding groove 1422. In this way, by arranging the support protrusion 170, the antenna structure 101 can be raised, and the distance between the antenna structure 101 and the first antenna 110 can be increased. Of course, the support protrusion 170 can also not be arranged.

[0097] In some embodiments, the size of the first avoiding groove 1421 along the direction of the groove depth (i.e. the direction perpendicular to the first sub-reflection surface 1411) is a first value, the sum of the size of the support protrusion 170 and the size of the second avoiding groove 1422 along the direction of the groove depth (i.e. the direction perpendicular to the second sub-reflection surface 1412) is a second value, the first value is equal to the second value, so that the groove depth of the second avoiding groove 1422 is smaller, which is beneficial to reduce the influence of the second avoiding groove 1422 on the structural strength of the antenna reflecting plate 140, and in addition, the depth of the avoiding space formed by the second avoiding groove 1422 and the support protrusion 170 is the same as the groove depth of the first avoiding groove 1421, so that the avoiding space and the first avoiding groove 1421 can better avoid the corresponding electronic elements.

[0098] For example, the support protrusion 170 can extend along the circumference of the second avoiding groove 1422.

[0099] In some embodiments, referring to Figure 4 , the support protrusion 170 is provided with a positioning opening 173, the positioning opening 173 penetrates the support protrusion 170 along the direction from the center to the edge of the second avoiding groove 1422 (i.e. the direction from top to bottom in Figure 4 , the positioning opening 173 includes a first side surface 171 and a second side surface 172 arranged oppositely and spaced apart, the first side surface 171 includes a first sub-surface 1711 and a second sub-surface 1712 arranged away from the second avoiding groove 1422, the positioning opening 173 includes a first sub-positioning opening 1731 and a second sub-positioning opening 1732 which are communicated, the first sub-positioning opening 1731 is located between the first sub-surface 1711 and the second side surface 172, and the second sub-positioning opening 1732 is located between the second sub-surface 1712 and the second side surface 172. Figure 4 The side of the antenna structure 101 facing the antenna reflecting plate 140 is provided with a positioning protrusion (not shown in ), which is located in the first sub-positioning opening 1731 and is in contact with the first sub-surface 1711 and the second side surface 172, so that when the antenna structure 101 is installed on the antenna reflecting plate 140, the antenna structure 101 can be pre-positioned by inserting the positioning protrusion into the first sub-positioning opening 1731, and then the antenna structure 101 and the antenna reflecting plate 140 are further assembled and fixed, which can reduce the assembly difficulty between the antenna structure 101 and the antenna reflecting plate 140.

[0100] In some embodiments, referring to Figure 4 , the size of the first sub-positioning opening 1731 and the positioning protrusion along the direction from the first sub-surface 1711 to the second side surface 172 gradually decreases from the direction of the positioning opening 173 to the direction of the second avoiding groove 1422, so that Figure 4Above the positioning opening 173, the positioning protrusion is inserted into the positioning opening 173 from top to bottom. The first sub-positioning opening 1731 can limit the positioning protrusion to prevent it from passing through the positioning opening 173, thus achieving pre-assembly.

[0101] For example, the positioning protrusion is located at the edge of the antenna structure 101.

[0102] In some embodiments, the end of the second side surface 172 away from the second clearance groove 1422 is inclined away from the center of the positioning opening 173 relative to the end near the second clearance groove 1422, and the second side surface 172 is configured as a guide surface. The second sub-surface 1712 and the first sub-surface 1711 are spaced apart along the direction from the first side surface 171 to the second side surface 172. Along the direction from the first side surface 171 to the second side surface 172, the second sub-surface 1712 is further away from the center of the positioning opening 173 relative to the first sub-surface 1711. The minimum distance between the second sub-surface 1712 and the second side surface 172 is greater than the maximum size of the positioning protrusion. Thus, the distance of the second sub-positioning opening 1732 along the direction from the first side surface 171 to the second side surface 172 is large, and the positioning protrusion can be easily moved from the center of the positioning opening 1732. Figure 4 The upper part enters the second sub-positioning opening 1732. At this time, the positioning protrusion can be inserted into the second sub-positioning opening 1732 first, and then the positioning protrusion can be pressed against the second side 172 so that the positioning protrusion enters the first sub-positioning opening 1731 along the second side 172. Due to the guiding effect of the second side 172, it is easier for the positioning protrusion to enter the first sub-positioning opening 1731.

[0103] For example, see Figure 4 The first sub-surface 1711 and the second sub-surface 1712 are connected by a third sub-surface 1713. The third sub-surface 1713 extends in a direction away from the second side surface 172, such that the first sub-surface 1711 and the second sub-surface 1712 are spaced apart in the direction of the first side surface 171 and the second side surface 172.

[0104] In some embodiments, see Figure 4The size of the first sub-positioning opening 1731 is greater than the size of the second sub-positioning opening 1732 in the direction of the groove depth of the second avoiding groove 1422. Thus, the positioning protrusion is first inserted into the second sub-positioning opening 1732, and then the positioning protrusion is abutted against the second side surface 172, so that the positioning protrusion enters the first sub-positioning opening 1731 along the second side surface 172 and presses the antenna structure 101 in the direction close to the reflecting surface 141, so that the antenna structure 101 is inserted into a deeper part of the first sub-positioning opening 1731. The supporting protrusion 170 between the second sub-positioning opening 1732 and the antenna reflecting plate 140 can prevent the positioning protrusion from accidentally escaping from the positioning opening 173 in the direction of the second avoiding groove 1422 to the positioning opening 173, and can improve the stability of the pre-assembly.

[0105] The missile-borne device provided by the embodiments of the present application is described below.

[0106] The missile-borne device provided by the embodiments of the present application is described below.

[0107] For example, the missile-borne device can be a missile-borne device or similar device that has certain requirements for anti-interference capability.

[0108] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as falling within the scope of the present application.

[0109] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An antenna device, characterized by The antenna device comprises: an antenna reflector provided with a reflecting surface; an antenna structure arranged on the reflecting surface; a plurality of first antennas arranged on the reflecting surface and spaced along the circumference of the antenna structure; wherein the reflecting surface comprises a plurality of first sub-reflection surfaces and a second sub-reflection surface, the plurality of first sub-reflection surfaces are arranged along the circumference of the second sub-reflection surface, the plurality of first sub-reflection surfaces are arranged correspondingly to the plurality of first antennas, the first antennas are located on the corresponding first sub-reflection surfaces, and the antenna structure is located on the second sub-reflection surface; the first sub-reflection surface and the second sub-reflection surface are obliquely intersected.

2. The antenna device of claim 1, wherein, Two adjacent first sub-reflection surfaces are obliquely intersected.

3. The antenna device according to claim 1 or 2, characterized in that The antenna device comprises a plurality of isolation members spaced along the circumference of the antenna structure; the plurality of isolation members and the plurality of first antennas are arranged correspondingly, and the isolation members are located between the corresponding first antennas and the antenna structure.

4. The antenna device of claim 3, wherein The first antenna comprises a first circuit board and a first antenna body arranged away from the antenna reflector; in the corresponding isolation member and the first antenna, the isolation member comprises a first isolation part and a second isolation part connected in series, the first isolation part is connected to one side of the first circuit board away from the reflecting surface, and the second isolation part is located on one side of the first isolation part away from the reflecting surface; along the thickness direction of the first circuit board, the area of the orthographic projection of the first isolation part on the first circuit board is greater than the area of the orthographic projection of the second isolation part on the first circuit board; and / or, the first isolation part comprises a first sub-isolation part and two second sub-isolation parts, the first sub-isolation part is connected between the two second sub-isolation parts, the first sub-isolation part protrudes from the second isolation part towards the direction close to the antenna structure, the second sub-isolation part protrudes from the second isolation part away from the antenna structure, and at least part of the first antenna body is located between the two second sub-isolation parts; and / or, along the thickness direction of the antenna reflector, the size of the isolation member is greater than the size of the first antenna and smaller than the size of the antenna structure.

5. The antenna device according to claim 1 or 2, characterized in that The antenna device comprises a protective cover, the antenna structure comprises a second antenna, the second antenna comprises a second circuit board and a second antenna body arranged away from the antenna reflector; at least part of the second antenna body is a flexible member, and the protective cover is sleeved on the outside of the second antenna body.

6. The antenna device according to claim 5, characterized in that The protective cover comprises a cover part and a mounting part, the cover part is sleeved on the outer periphery of the second antenna body, the mounting part is located on one side of the cover part towards the antenna reflector and protrudes from the cover part away from the second antenna body; and / or, the antenna structure comprises a third antenna, the third antenna is located between the second sub-reflection surface and the second antenna; at least one of the first antenna and the third antenna is a microstrip antenna, and the second antenna is a spiral antenna; and / or, the second antenna body is cylindrical.

7. The antenna device according to claim 1 or 2, characterized in that The antenna reflector is provided with a plurality of first and second avoiding grooves on one side of the antenna structure, the plurality of first avoiding grooves are provided correspondingly with the plurality of first antennas, in the corresponding first avoiding groove and the first antenna, the first antenna covers the slot of the first avoiding groove, and the first sub-reflector is arranged on the outer periphery of the slot of the first avoiding groove; the antenna structure covers the slot of the second avoiding groove, and the second sub-reflector is arranged on the outer periphery of the slot of the second avoiding groove.

8. The antenna device of claim 7, wherein, The second sub-reflector is provided with a supporting protrusion between the second sub-reflector and the antenna structure, and at least part of the outer periphery of the slot of the second avoiding groove; In the direction of the groove depth of the first avoiding groove, the size of the first avoiding groove is a first value, in the direction of the groove depth of the second avoiding groove, the sum of the size of the supporting protrusion and the size of the second avoiding groove is a second value, and the first value is equal to the second value.

9. The antenna device of claim 8, wherein, The supporting protrusion is provided with a positioning opening, the positioning opening penetrates the supporting protrusion in the direction from the center to the edge of the second avoiding groove; the positioning opening includes a first side and a second side arranged oppositely and spaced apart, the first side includes a first sub-face and a second sub-face arranged away from the second avoiding groove, the positioning opening includes a first sub-positioning opening and a second sub-positioning opening, the first sub-positioning opening is located between the first sub-face and the second side, and the second sub-positioning opening is located between the second sub-face and the second side; The antenna structure is provided with a positioning protrusion on one side of the antenna reflector, the positioning protrusion is located in the first sub-positioning opening and is attached to the first sub-face and the second side; The size of the first sub-positioning opening and the positioning protrusion in the direction from the first side to the second side gradually decreases from the direction of the positioning opening to the second avoiding groove; and / or, The end of the second side away from the second avoiding groove is arranged to be inclined away from the center of the positioning opening relative to the end close to the second avoiding groove, and is configured as a guide surface; in the direction from the first side to the second side, the second sub-face is farther away from the center of the positioning opening relative to the first sub-face, and the minimum distance between the second sub-face and the second side is greater than the maximum size of the positioning protrusion; and / or, In the direction of the groove depth of the second avoiding groove, the size of the first sub-positioning opening is greater than the size of the second sub-positioning opening.

10. A missile-borne device, characterized by The antenna device includes any one of claims 1-9.

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