Waveguide antenna, waveguide antenna assembly, radio frequency device, radar and electronic equipment

Abstract

The embodiment of the utility model relates to the technical field of electronic devices, provides a waveguide antenna, a waveguide antenna assembly, a radio frequency device, a radar and electronic equipment, and can realize signal transmission between the waveguide antenna and a chip without arranging an additional conversion structure, thereby greatly reducing the structural complexity and the production cost. The waveguide antenna comprises a plurality of waveguide interfaces arranged in an array, and the adjacent waveguide interfaces are orthogonally arranged; the waveguide interface comprises a single ridge-shaped waveguide port, and the single ridge-shaped waveguide port is used for transmitting radio frequency signals radiated and / or received by the waveguide antenna.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electronic devices, and in particular to a waveguide antenna, a waveguide antenna assembly, a radio frequency device, a radar, and an electronic device. Background Art

[0002] Compared with PCB (Printed Circuit Board) antennas, metal waveguide antennas have the advantages of low loss, high gain and low cost. In many fields (such as automotive millimeter wave antennas), they are gradually replacing PCB antennas and becoming the mainstream. When metal waveguide antennas are used in RF devices, a conversion structure is usually required to achieve signal transmission between the metal waveguide antenna and the chip of the RF device, which undoubtedly increases the structural complexity and production cost, and needs to be optimized urgently. Utility Model Content

[0003] The embodiments of the present application provide a waveguide antenna, a waveguide antenna assembly, a radio frequency device, a radar and an electronic device, which can realize signal transmission between a waveguide antenna and a chip, and can significantly reduce structural complexity and production costs.

[0004] According to some embodiments of the present application, a first aspect of the embodiments of the present application provides a waveguide antenna, comprising a plurality of waveguide interfaces arranged in an array, wherein adjacent waveguide interfaces are orthogonally arranged;

[0005] The waveguide interface comprises a single-ridge waveguide port, and the single-ridge waveguide port is used to transmit the radio frequency signal radiated and / or received by the waveguide antenna.

[0006] According to some embodiments of the present application, a second aspect of the embodiments of the present application provides a waveguide antenna assembly, including the above-mentioned waveguide antenna, and a PCB board;

[0007] The waveguide antenna is arranged on one side of the PCB board, and a waveguide port is arranged on the side of the PCB board facing the waveguide antenna. The waveguide port is arranged in a one-to-one correspondence with the waveguide interface of the waveguide antenna.

[0008] According to some embodiments of the present application, a third aspect of the embodiments of the present application provides a radio frequency device, including the above-mentioned waveguide antenna assembly, and a chip package;

[0009] The chip package is provided with at least one radiation portion, and the radiation portion is arranged opposite to the second single ridge opening of the PCB board of the waveguide antenna assembly.

[0010] According to some embodiments of the present application, a fourth aspect of the embodiments of the present application provides a radar, comprising the above-mentioned radio frequency device.

[0011] According to some embodiments of the present application, a fifth aspect of the embodiments of the present application provides an electronic device, including the above-mentioned radar.

[0012] The embodiments of the present application provide a waveguide antenna, a waveguide antenna assembly, a radio frequency device, a radar and an electronic device. In the radio frequency device including the waveguide antenna assembly, a signal transmission channel can be formed by the waveguide interface of the waveguide antenna, the waveguide port of the PCB board and the second single ridge opening of the PCB board. The signal can be transmitted between the waveguide antenna and the radiation part of the chip package without setting an additional conversion structure, thereby greatly reducing the structural complexity and production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise specified, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present application or the technical solutions in the traditional technology, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic structural diagram of a waveguide interface of a waveguide antenna provided in an embodiment of the present application;

[0015] Figure 2 A schematic structural diagram of a waveguide interface of another waveguide antenna provided in an embodiment of the present application;

[0016] Figure 3 A schematic diagram of the structure of a radio frequency device provided in an embodiment of the present application;

[0017] Figure 4 A schematic diagram of the structure of another radio frequency device provided in an embodiment of the present application;

[0018] Figure 5 A schematic structural diagram of a waveguide interface of another waveguide antenna provided in an embodiment of the present application;

[0019] Figure 6 A schematic structural diagram of a waveguide port of a PCB board provided in an embodiment of the present application;

[0020] Figure 7 A schematic diagram of a waveguide channel of a waveguide antenna provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only 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 making creative work are within the scope of protection of the present application.

[0022] In the description of the embodiments of the present application, "at least one" means one or more, "multiple" means two or more, and "multiple rows" means two or more rows, unless otherwise clearly and specifically defined.

[0023] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0024] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. For example, if the device or element in the figure is inverted, then the element described as being "below" or "below" or "below" or "bottom" of other elements or features will be oriented "above" or "top" of the other elements or features. Therefore, the term "below" may cover both the above and below orientations depending on the context in which the term is used, which will be obvious to a person of ordinary skill in the art. The material can be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatially relative descriptors used herein can be interpreted accordingly.

[0027] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0028] In the description of the embodiments of the present application, when a certain component "includes" another component, unless otherwise specified, other components are not excluded, and other components may be further included. A second component is formed or provided above or on the first component, or a second component is formed or provided on the surface of the first component, or a second component is formed or provided on one side of the first component, which may include an embodiment in which the first component and the second component are in direct contact, and may also include an embodiment in which an additional component may be provided between the first component and the second component, so that the first component and the second component may not be in direct contact. For the sake of simplicity and clarity, various components may be drawn arbitrarily in different proportions. In the accompanying drawings, some layers / components may be omitted for simplicity. Unless otherwise specified, a second component is formed or provided on the surface of the first component, which means that the first component is in direct contact with the second component. Among them, the above-mentioned "component" may refer to a layer, a film, an area, a part, a structure, etc.

[0029] The present application embodiment provides a waveguide antenna, referring to Figure 1and Figure 2 As shown, it includes a plurality of waveguide interfaces 11 arranged in an array, and adjacent waveguide interfaces 11 are arranged orthogonally.

[0030] Each waveguide interface 11 includes a single-ridge waveguide port 110 , and the single-ridge waveguide port 110 is used to transmit the radio frequency signal radiated and / or received by the waveguide antenna.

[0031] The waveguide antenna may include a plurality of sub-antennas, each of which includes a waveguide interface, and the waveguide interfaces of the sub-antennas are centrally arranged. Figure 1 and Figure 2 The waveguide antenna shown includes 8 waveguide interfaces 11, and the waveguide antenna may include 8 sub-antennas, for example, including 4 receiving sub-antennas and 4 transmitting sub-antennas. The specific structure of each sub-antenna is not limited here. For example, the sub-antenna may be a single-ridge slot waveguide antenna, which refers to a single-ridge waveguide antenna provided with a radiation slot, which may include a connected waveguide interface and a single-ridge slot waveguide, or may also include a waveguide interface, a rectangular waveguide and a single-ridge slot waveguide connected in sequence, and of course, other structures may also be used.

[0032] In the above waveguide antenna, the number of waveguide interfaces included in each row of waveguide interfaces is not limited, and the number of waveguide interfaces in different rows may be different, or may also be different. Figure 1 Among them, the three rows of waveguide interfaces arranged along the OA direction, the number of waveguide interfaces in the first row and the second row is 3, and the number of waveguide interfaces in the third row is 2; the three columns of waveguide interfaces arranged along the OB direction, the number of waveguide interfaces in the first column is 2, and the number of waveguide interfaces in the second column and the third column is 3.

[0033] The specific structure of the above-mentioned waveguide interface is not limited. For example, the waveguide interface may include a waveguide cavity and a ridge portion. The waveguide cavity is provided with a rectangular hollow channel, and the ridge portion is provided on a side surface in the rectangular hollow channel, thereby forming a hollow channel similar to a concave shape, that is, a single ridge waveguide channel. The materials of the waveguide cavity and the ridge portion are not limited. For example, the materials of the waveguide cavity and the ridge portion may both be metal, or plastic with a metal-plated surface. The shape and size of the waveguide cavity are also not limited and can be selected according to actual conditions. For example, the waveguide cavity may be a rectangular waveguide cavity.

[0034] The two adjacent waveguide interfaces are arranged orthogonally, that is, the two adjacent waveguide interfaces are arranged vertically, so that the polarization directions of the two adjacent waveguide interfaces are vertical. Figure 1The principle of orthogonal setting is illustrated by taking the adjacent waveguide interface a and waveguide interface b arranged along the OA direction as an example. The polarization direction of waveguide interface a is horizontal to the right, and the polarization direction of waveguide interface b is vertically downward. Both are perpendicular to the long side of the waveguide-waveguide interface. Through the orthogonal setting of adjacent waveguide-waveguide interfaces, the polarization directions of adjacent waveguide-waveguide interfaces are also vertical, thereby greatly reducing the mutual crosstalk between the RF signals transmitted in the waveguide interface a and the waveguide interface b, and improving the accuracy of the waveguide antenna transmission signal.

[0035] It should be noted that in the present application, the waveguide interface includes a single-ridge waveguide port, and a single-ridge waveguide channel is arranged in the single-ridge waveguide port. Compared with a rectangular waveguide channel, a single-ridge waveguide channel can enhance the aggregation of the field, so that the corresponding wavelength of the radio frequency signal when propagating in the single-ridge waveguide channel is smaller, so that the size can be made smaller and have a smaller cross-sectional area. Therefore, compared with a waveguide interface provided with a rectangular waveguide channel, a waveguide interface provided with a single-ridge waveguide channel occupies a smaller area and can be suitable for a denser waveguide interface arrangement. Compared with a double-ridge waveguide channel, under the same processing accuracy, a single-ridge waveguide channel has a lower cutoff frequency. Therefore, compared with a waveguide interface provided with a double-ridge waveguide channel, a waveguide interface provided with a single-ridge waveguide channel can transmit a wider range of radio frequency signals under the same processing accuracy.

[0036] The above-mentioned waveguide antenna can receive or radiate radio frequency signals, which can be FMCW (Frequency-Modulated Continuous Wave) millimeter wave signals, and of course can also be radio frequency signals of other bands; or, if conditions permit, it can also be applied to fields such as 5G communications.

[0037] In the waveguide antenna provided in the embodiment of the present application, each waveguide interface of the waveguide interface unit is provided with a single ridge waveguide channel. When the waveguide antenna is applied in a radio frequency device, it can be directly connected to a PCB board provided with a waveguide port, and there is no need to additionally set up a switching structure between the PCB board and the waveguide antenna, so that the signal can be transmitted between the waveguide antenna and the PCB board, thereby greatly reducing the structural complexity and production cost. In addition, in the waveguide antenna, two adjacent waveguide interfaces are orthogonally arranged, so that the signal crosstalk problem between the two adjacent waveguide interfaces can be greatly reduced, thereby improving the accuracy of the signal transmitted by the waveguide antenna. At the same time, in the waveguide antenna, each waveguide interface of the waveguide interface unit occupies a smaller area, which is suitable for a denser arrangement of waveguide interfaces; and under the same processing accuracy, it has a lower cutoff frequency and can transmit a wider range of radio frequency signals.

[0038] In one or more embodiments, reference Figure 1 and Figure 2As shown, a groove 10 is provided between any adjacent waveguide interfaces 11, and the groove can be filled with air medium or other insulating medium (such as resin), which is not limited here. Since the dielectric constant of air medium is small, the loss of signal energy is small, so air medium is often used for filling.

[0039] In one or more embodiments, in order to facilitate implementation and effectively prevent signal leakage, refer to Figure 1 As shown, the groove depth of the groove 10 is an odd multiple of λ / 4, for example, the groove depth may be λ / 4, 3λ / 4 or 5λ / 4, etc., where λ is the working wavelength of the radio frequency signal. For ease of manufacturing, the grooves 10 between all adjacent waveguide interfaces 11 may be connected.

[0040] In one or more embodiments, reference Figure 1 As shown, the waveguide antenna further comprises at least one protrusion 13 , and the protrusion 13 is located in the groove 10 between two waveguide interfaces 11 arranged diagonally.

[0041] Since the distance between the two diagonally arranged waveguide interfaces is large, resonance is easily generated, so a protrusion is provided in the groove between the two diagonally arranged waveguide interfaces to reduce resonance and reduce signal energy loss.

[0042] The shape and size of the protrusion are not limited. For example, the shape of the protrusion can be a cuboid, a cylinder, a step, or the like. Figure 1 Three rectangular protrusions are used as an example for illustration. The material of the protrusion can be metal, or plastic with metal coating on the surface. The material of the protrusion can be the same as or different from the material of the waveguide interface; considering the simplification of production, the protrusion and the waveguide interface can be made of the same material.

[0043] In one or more embodiments, in order to avoid affecting the connection between the waveguide interface and other waveguide ports, the protrusion is arranged flush with the waveguide interface. Of course, the protrusion may also be slightly lower than the waveguide interface.

[0044] The following is a structure of a waveguide antenna. Figure 1 and Figure 3 As shown, the waveguide antenna 1 further includes a base portion 12 arranged around the waveguide interface, and the waveguide interface 11 is arranged to protrude from the surface of the base portion 12 .

[0045] The base part may be provided with other structures of the waveguide antenna, for example, structures other than the waveguide interface in each sub-antenna included in the waveguide antenna. The waveguide interface protrudes from the base part, so when the waveguide interface is connected to the PCB board, the two can be allowed to pass along the Figure 3There is a certain installation gap (for example: 0-400 microns) in the C1C2 direction shown, so as to avoid collision damage caused by processing, installation and plate warping. Figure 1 is from Figure 3 FIG. 1 is a schematic diagram of the structure of the waveguide interface of the waveguide antenna looking along the C1C2 direction. FIG.

[0046] refer to Figure 1 As shown, the above-mentioned multiple waveguide interfaces 11 can be multiple independently arranged annular bosses, and a groove 10 with a groove depth of an odd multiple of λ / 4 can be arranged between adjacent annular bosses. Then, when the waveguide interface is connected to the PCB board, the signal leakage problem at the waveguide interface between the PCB board and the waveguide antenna can be effectively prevented, and it is also convenient for processing, manufacturing and installation.

[0047] The following is a structure of a waveguide antenna. Figure 4 and Figure 5 As shown, the waveguide antenna also includes a base portion 12 and a plurality of anti-leakage structures 14 arranged around the waveguide interface 11; the waveguide interface 11 is arranged flush with the surface of the base portion 12; the plurality of anti-leakage structures 14 are located around the waveguide interface 11, and the anti-leakage structures 14 are arranged protruding from the base portion 12.

[0048] The size and shape of the leakage-proof structure are not limited. For example, the leakage-proof structure may be a cylinder, a cuboid, or a terrace. The sizes of the multiple leakage-proof structures around each waveguide interface may be the same or different. For example, Figure 5 As shown, several thick cylinders can be set and several thin cylinders can be set at the same time, which is not limited here.

[0049] When the waveguide interface is connected to the PCB board, the anti-leakage structure allows the two to Figure 4 There is a certain installation gap (for example: 0-400 microns) in the C1C2 direction shown, so as to avoid collision damage caused by processing, installation and board warping; at the same time, it can block the energy escaping from the waveguide interface of the PCB board and the waveguide antenna, thereby further preventing signal leakage.

[0050] In one or more embodiments, the waveguide antenna also includes a base portion arranged around the waveguide interface; the base portion includes a plurality of waveguide units, each waveguide unit is connected to a corresponding waveguide interface, and the waveguide unit is provided with a radiation slot, which is used to radiate and / or receive radio frequency signals.

[0051] It should be noted that the structure of the waveguide unit is not limited here. For example, the waveguide unit may be a single-ridge waveguide provided with a radiation slot; or, the waveguide unit may also include a rectangular waveguide and a single-ridge waveguide provided with a radiation slot. Figure 7As shown, the waveguide channel of the waveguide antenna includes a single-ridge waveguide channel 111 of the interface, a rectangular waveguide channel 121 and a waveguide channel 122 provided with a radiation slot 123, wherein the rectangular waveguide channel 121 is used to transmit the radio frequency signal transmitted by the single-ridge waveguide channel 111 to the waveguide channel 122 provided with the radiation slot 123, and / or, transmit the radio frequency signal transmitted by the waveguide channel 122 provided with the radiation slot 123 to the single-ridge waveguide channel 111; the waveguide channel 122 provided with the radiation slot 123 is used to radiate the radio frequency signal transmitted by the rectangular waveguide channel 121 to the outside, and / or, transmit the radio frequency signal received from the outside to the rectangular waveguide channel 121.

[0052] It should be noted that the manufacturing method of the above waveguide antenna is not limited. For example, the part above the dividing line D1D2 and the part below the dividing line D1D2 as shown in 7 can be manufactured separately, and then the two parts are fixed by welding or bonding to form the final waveguide antenna. When the part above the dividing line D1D2 and the part below the dividing line D1D2 are not tightly connected, this segmentation method can effectively reduce energy leakage.

[0053] The waveguide interface and the waveguide unit can form a sub-antenna, which can have the function of sending and / or receiving signals. The signal feeding method is not limited. For example, it can be fed in the middle or side. The connection method of the waveguide unit and the waveguide interface is not limited. For example, it can be connected through the wide side of the waveguide unit and the waveguide interface (i.e., the wide side is turned out), or it can be connected through the narrow side of the waveguide unit and the waveguide interface unit (i.e., the narrow side is turned out), which can be set according to the arrangement of the waveguide interface.

[0054] The present application also provides a waveguide antenna assembly, referring to Figure 3 and Figure 4 As shown, it includes the above-mentioned waveguide antenna 1 and a PCB board 2; the waveguide antenna 1 is arranged on one side of the PCB board 2, and a plurality of waveguide ports are arranged on the side of the PCB board 2 facing the waveguide antenna 1, and the waveguide ports are arranged one by one correspondingly to the waveguide interfaces of the waveguide antenna 1.

[0055] The structure of the waveguide port is not limited here, as long as it can be matched and connected with the waveguide interface of the waveguide antenna. For example, the waveguide port can be provided with a single-ridge waveguide channel, a double-ridge waveguide channel, or a rectangular waveguide channel.

[0056] The PCB board and the waveguide antenna can be directly connected without setting up a switching structure, which can greatly reduce the structural complexity and production cost.

[0057] In one or more embodiments, in order to better match the waveguide interface in the waveguide antenna, thereby improving the speed and quality of signal transmission, reference Figure 6 As shown, the waveguide port 21 includes a plurality of first single ridge openings 22, and the first single ridge openings are used to transmit radio frequency signals radiated and / or received by the waveguide antenna.

[0058] The above-mentioned waveguide ports are arranged in a one-to-one correspondence with the waveguide interfaces in the waveguide antenna. The setting instructions of the waveguide ports can refer to the relevant instructions of the waveguide interfaces in the aforementioned waveguide antenna, which will not be repeated here.

[0059] In one or more embodiments, a plurality of second single-ridge openings corresponding to the plurality of waveguide ports are provided on a side of the PCB board facing away from the waveguide antenna, and each second single-ridge opening is connected to the corresponding waveguide port; in this way, when the chip is arranged on a side of the PCB board facing away from the waveguide antenna, the signal radiated by the chip can be transmitted to the corresponding waveguide port through the plurality of second single-ridge openings of the PCB board in sequence, and then transmitted to the waveguide interface corresponding to the waveguide antenna, and / or the radio frequency signal received by the waveguide antenna is transmitted to the waveguide port of the PCB board through the plurality of waveguide interfaces, and then transmitted to the chip through the plurality of second single-ridge openings of the PCB board, thereby realizing the transmission of the radio frequency signal between the chip and the waveguide antenna.

[0060] A single-ridge waveguide channel may be provided in the first single-ridge opening of the waveguide port, and the single-ridge waveguide channel may pass through the PCB board, thereby realizing the connection between the second single-ridge opening and the waveguide port; or, the PCB board may also be provided with an intermediate waveguide channel, and the second single-ridge opening and the waveguide port are connected through the intermediate waveguide channel, and the intermediate waveguide channel may be a straight line or a curved line, which is not limited here.

[0061] The present application also provides a radio frequency device, referring to Figure 3 and Figure 4 As shown, it includes a waveguide antenna assembly and a chip package 3; the chip package 3 is provided with at least one radiating portion 31, and each radiating portion 31 is arranged opposite to the second single ridge opening of the PCB board 2 of the waveguide antenna assembly.

[0062] The radiating portion 31 transmits the first RF signal to the waveguide interface of the waveguide antenna 1 of the waveguide antenna assembly through the waveguide port of the PCB board 2 of the waveguide antenna assembly, and / or the waveguide interface of the waveguide antenna 1 of the waveguide antenna assembly transmits the second RF signal to the radiating portion 31 through the waveguide port of the PCB board 2 of the waveguide antenna assembly.

[0063] It should be noted that Figure 5 The waveguide interface shown and Figure 6 The waveguide ports shown correspond to the settings, Figure 5 is from Figure 4The schematic diagram of the structure of the waveguide interface looking toward the waveguide antenna along the C2C1 direction. Figure 6 is from Figure 4 Schematic diagram of the structure of the waveguide port looking toward the PCB board along the C2C1 direction.

[0064] The first RF signal radiated by the radiating part of the above-mentioned chip package is transmitted to the waveguide interface of the waveguide antenna through the second single ridge opening of the PCB board and the waveguide port of the PCB board in sequence, thereby realizing the transmission of the first RF signal radiated by the chip package to the waveguide antenna; and / or, the second RF signal received by the waveguide antenna is transmitted to the radiating part of the chip package through the waveguide interface of the waveguide antenna, the waveguide port of the PCB board and the second single ridge opening of the PCB board in sequence, thereby realizing the transmission of the second RF signal received by the waveguide antenna to the chip package. The RF device is based on ROP (Radiation on Package, package external RF waveguide interface) technology, so that the waveguide antenna can be directly connected to the chip without the need for an additional conversion structure, thereby greatly reducing the structural complexity and production cost.

[0065] In one or more embodiments, reference Figure 3 and Figure 4 As shown, the radio frequency device also includes a plurality of bumps 4; the plurality of bumps 4 are arranged around the second single ridge opening of the PCB board 2, that is, a plurality of bumps 4 are arranged around the second single ridge opening of each PCB board 2 to ensure that the signals between the channels do not crosstalk with each other.

[0066] Here, the bumps can be solder balls or tin balls, etc. There is no limitation on the arrangement mode. For example, multiple bumps can be arranged in a ball grid array (BGA). Multiple bumps can enclose a cavity structure with a circular, triangular, quadrilateral or irregular cross-section; the cavity structure enclosed by multiple bumps can be a hollow structure with air as the transmission medium, or a solid structure with insulating material as the transmission medium, which is not limited here. Factors such as the size of the cavity structure enclosed by multiple bumps and the dielectric constant inside the cavity structure will affect the signal frequency transmitted by the cavity structure. Under the premise that other influencing factors remain unchanged, the smaller the size of the cavity structure enclosed by multiple bumps, the larger the corresponding signal frequency; under the premise that other influencing factors remain unchanged, the larger the dielectric constant of the cavity structure enclosed by multiple bumps, the smaller the corresponding signal frequency. The chip design size and the dielectric constant of the transmission medium are comprehensively considered to meet the cutoff frequency requirements of the chip.

[0067] The embodiment of the present application also provides a radar, including the above-mentioned radio frequency device. The working band of the radar is not limited. For example, the working band of the radar can be a millimeter wave band, and of course it can also be other bands. The application scenario of the radar is not limited. For example, the radar can be used in transportation electronic equipment such as cars, bicycles, motorcycles, ships, subways or trains to detect objects such as vehicles, pedestrians, overpasses, trees or parking spaces. Of course, it can also be used in security equipment such as cameras, or other fields, which are not limited here.

[0068] The embodiment of the present application also provides an electronic device, including the above-mentioned radar. The electronic device can be a component and product used in fields such as smart housing, transportation, smart home, consumer electronics, monitoring, industrial automation, cabin detection and health care. For example, the electronic device can be an intelligent transportation equipment (for example, a car, a bicycle, a motorcycle, a ship, a subway or a train, etc.), a security device (for example, a camera), a liquid level / flow rate detection device, an intelligent wearable device (for example, a bracelet or glasses, etc.), a smart home device (for example, a sweeping robot, a door lock, a television, an air conditioner or a smart lamp, etc.), various communication devices (for example, a mobile phone or a tablet computer, etc.), and gates, intelligent traffic lights, intelligent signs, traffic cameras or various industrialized mechanical arms (or robots), etc., or various instruments for detecting life characteristic parameters or various devices equipped with the instrument, such as: in-cabin detection of a car, indoor personnel monitoring, intelligent medical equipment or consumer electronic equipment, etc.

[0069] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present application, and in practical applications, various changes may be made to the embodiments in form and detail without departing from the spirit and scope of the present application. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present application, and therefore the scope of protection of the present application shall be subject to the scope defined in the claims.

Claims

1. A waveguide antenna, characterized in that: It comprises a plurality of waveguide interfaces arranged in an array, wherein adjacent waveguide interfaces are arranged orthogonally; The waveguide interface comprises a single-ridge waveguide port, and the single-ridge waveguide port is used to transmit the radio frequency signal radiated and / or received by the waveguide antenna.

2. The waveguide antenna according to claim 1, characterized in that: A groove is arranged between any adjacent waveguide interfaces.

3. The waveguide antenna according to claim 2, characterized in that: The groove depth of the groove is an odd multiple of λ / 4, where λ is the operating wavelength of the radio frequency signal.

4. The waveguide antenna according to claim 2, characterized in that: The waveguide antenna further comprises at least one protrusion, wherein the protrusion is located in the groove between two diagonally arranged waveguide interfaces.

5. The waveguide antenna according to any one of claims 1 to 4, characterized in that: The waveguide antenna further comprises a base portion arranged around the waveguide interface, and the waveguide interface is arranged protruding from the surface of the base portion.

6. The waveguide antenna according to claim 1, characterized in that: The waveguide antenna further comprises a base portion and a plurality of anti-leakage structures arranged around the waveguide interface; the waveguide interface is arranged flush with the surface of the base portion; Wherein, the plurality of anti-leakage structures are located around the waveguide interface, and the anti-leakage structures are arranged to protrude from the base portion.

7. The waveguide antenna according to any one of claims 1 to 4, characterized in that: The waveguide antenna also includes a base portion arranged around the waveguide interface; the base portion includes a plurality of waveguide units, each of the waveguide units is connected to the corresponding waveguide interface, and the waveguide unit is provided with a radiation slot, and the radiation slot is used to radiate and / or receive radio frequency signals.

8. A waveguide antenna assembly, characterized in that: Comprising the waveguide antenna according to any one of claims 1 to 7, and a PCB board; The waveguide antenna is arranged on one side of the PCB board, and a plurality of waveguide ports are arranged on the side of the PCB board facing the waveguide antenna, and the waveguide ports are arranged in a one-to-one correspondence with the waveguide interfaces of the waveguide antenna.

9. The waveguide antenna assembly according to claim 8, characterized in that: The waveguide port includes a plurality of first single ridge openings, and the first single ridge openings are used to transmit radio frequency signals radiated and / or received by the waveguide antenna.

10. The waveguide antenna assembly according to claim 9, characterized in that: A plurality of second single-ridge openings corresponding to the plurality of waveguide ports are arranged on a side of the PCB board facing away from the waveguide antenna, and each of the second single-ridge openings is connected to the corresponding waveguide port.

11. A radio frequency device, characterized in that: Comprising the waveguide antenna assembly as claimed in any one of claims 8 to 10, and a chip package; The chip package is provided with at least one radiation portion, and the radiation portion is arranged opposite to the second single ridge opening of the PCB board of the waveguide antenna assembly.

12. The radio frequency device according to claim 11, characterized in that: The radio frequency device further comprises a plurality of protrusions; the plurality of protrusions are arranged around the second single ridge opening of the PCB board.

13. The radio frequency device according to claim 12, characterized in that: The bumps are solder balls.

14. A radar, characterized in that: Comprising the radio frequency device as described in any one of claims 11-13.

15. An electronic device, characterized in that: Comprising a radar as claimed in claim 14.

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