Waveguide device and related product

Abstract

A waveguide device and related products relate to the technical field of millimeter wave radars. The waveguide device comprises a first waveguide and N electromagnetic band gap units, wherein the N electromagnetic band gap units are located between the first waveguide and the antenna device, the N electromagnetic band gap units are aperiodically arranged around the first waveguide, signal transmission is carried out between the first waveguide and the antenna device, and N is an integer greater than 0. According to the waveguide device, reliable transmission of signals from the waveguide outlet of the radio frequency chip to the waveguide feed port of the antenna device can be realized through a non-periodic electromagnetic band gap unit arrangement form, and the signal transmission performance and the robustness of the waveguide outlet of the radio frequency chip and the waveguide feed port of the antenna device are improved.

Description

Technical Field

[0001] The present application relates to the field of millimeter wave radar technology, and in particular to a waveguide device and related products. Background Art

[0002] A waveguide is a structure used to direct electromagnetic waves. It is mainly used as a transmission line for microwave frequencies and is used to connect microwave transmitters and receivers to their antennas in microwave radio link equipment such as radar.

[0003] In millimeter-wave radar systems, three-dimensional waveguide antennas have obvious advantages in terms of loss and broadband characteristics compared to planar printed circuit board (PCB) printed antennas. The waveguide outlet of the RF chip adapted to the waveguide antenna is a rectangular waveguide outlet, which needs to be vertically connected to the waveguide feed port of the antenna device at the RF chip waveguide outlet to achieve vertical signal transmission.

[0004] However, during engineering implementation, it is easy for installation deviation and gap to occur at the point where the waveguide outlet of the RF chip vertically connects with the waveguide feed of the antenna device, resulting in a significant deterioration of signal transmission performance or even failure, thereby causing low robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device. Summary of the invention

[0005] The embodiments of the present application provide a waveguide device and related products, which can realize reliable transmission of signals from the waveguide outlet of the RF chip to the waveguide feed of the antenna device, improve the signal transmission performance and the robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device.

[0006] In a first aspect, an embodiment of the present application provides a waveguide device, the waveguide device comprising:

[0007] A first waveguide and N electromagnetic bandgap units, wherein N is an integer greater than 0;

[0008] The N electromagnetic band gap units are located between the first waveguide and the antenna device. The N electromagnetic band gap units are non-periodically arranged around the first waveguide. Signals are transmitted between the first waveguide and the antenna device.

[0009] In an embodiment of the present application, a waveguide device is provided, which can be applied to a millimeter wave radar or a millimeter wave radar system. N electromagnetic band gap (EBG) units in the waveguide device are located between a first waveguide and an antenna device, and the N electromagnetic band gap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band to prevent the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device.

[0010] At present, the waveguide outlet of the RF chip adapted for the waveguide antenna is a rectangular waveguide outlet, which needs to be vertically connected with the waveguide feed of the antenna device to realize vertical signal transmission. Since the vertical connection between the waveguide outlet of the RF chip and the waveguide feed of the antenna device is prone to installation deviation and gaps during engineering implementation, the signal transmission performance is greatly deteriorated or even fails, resulting in low robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device.

[0011] In the embodiment of the present application, the non-periodic EBG unit setting can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps, realize reliable transmission of signals from the waveguide outlet of the RF chip to the waveguide feed of the antenna device, and improve the signal transmission performance and the robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device.

[0012] In a possible implementation manner, two adjacent electromagnetic band gap units among the N electromagnetic band gap units have different cross-sectional shapes.

[0013] In an embodiment of the present application, a possible specific implementation of N electromagnetic band gap units is provided, specifically, among the N electromagnetic band gap units, there are two adjacent electromagnetic band gap units with different cross-sectional shapes. In this case, the N electromagnetic band gap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0014] Optionally, the cross section of the two adjacent electromagnetic band gap units may be a cross section perpendicular to the direction of signal transmission in the first waveguide, or may be a cross section parallel to the direction of signal transmission in the first waveguide, and the embodiments of the present application are not limited to this.

[0015] In a possible implementation manner, the N electromagnetic band gap units are arranged in a mirror-symmetrical manner.

[0016] In an embodiment of the present application, a possible specific implementation of N electromagnetic band gap units is provided, specifically, the N electromagnetic band gap units are arranged in a mirror-symmetrical manner. In this case, the N electromagnetic band gap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0017] Optionally, the N electromagnetic bandgap units are arranged in a mirror-symmetrical manner on a plane perpendicular to the signal transmission direction in the first waveguide.

[0018] In a possible implementation manner, among the N electromagnetic band gap units, there are two groups of adjacent electromagnetic band gap units with different intervals.

[0019] In an embodiment of the present application, a possible specific implementation of N electromagnetic band gap units is provided, specifically, among the N electromagnetic band gap units, there are two groups of adjacent electromagnetic band gap units with different spacings. In this case, the N electromagnetic band gap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0020] Optionally, the spacing between the two groups of adjacent electromagnetic band gap units can be understood as the spacing between the center points of the two groups of adjacent electromagnetic band gap units, or can be understood as the spacing between the edges of the two groups of adjacent electromagnetic band gap units, which is not limited in the embodiments of the present application.

[0021] In a possible implementation manner, the N electromagnetic bandgap units are arranged in a rectangular shape around the first waveguide.

[0022] In an embodiment of the present application, a possible specific implementation of N electromagnetic bandgap units is provided, specifically, the N electromagnetic bandgap units are arranged in a rectangular manner around the first waveguide. In this case, the N electromagnetic bandgap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0023] Optionally, the N electromagnetic bandgap units may also be arranged around the first waveguide in a square, circular, elliptical or other shape, as long as they are non-periodically arranged around the first waveguide to form an electromagnetic stop band, and the embodiments of the present application do not limit this.

[0024] In a possible implementation manner, two adjacent electromagnetic band gap units among the N electromagnetic band gap units have different cross-sectional areas.

[0025] In an embodiment of the present application, a possible specific implementation of N electromagnetic band gap units is provided, specifically, among the N electromagnetic band gap units, there are two adjacent electromagnetic band gap units with different cross-sectional areas. In this case, the N electromagnetic band gap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0026] Optionally, the cross section of the two adjacent electromagnetic band gap units may be a cross section perpendicular to the direction of signal transmission in the first waveguide, or may be a cross section parallel to the direction of signal transmission in the first waveguide, and the embodiments of the present application are not limited to this.

[0027] In a possible implementation, the N electromagnetic bandgap units are rectangular corner-cut protrusion structures.

[0028] In an embodiment of the present application, a possible specific implementation of N electromagnetic band gap units is provided, specifically, the N electromagnetic band gap units are rectangular cut-corner protrusion structures. In this case, the N electromagnetic band gap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0029] Optionally, the N electromagnetic bandgap units may be a convex structure of a rectangular cut corner, or may be a convex structure of multiple rectangular cut corners, which is not limited in the embodiments of the present application. When the electromagnetic bandgap unit has only one rectangular cut corner, it may be any one of the upper left cut corner, upper right cut corner, lower left cut corner, and lower right cut corner of the rectangle, which is not limited in the embodiments of the present application. When the electromagnetic bandgap unit has multiple rectangular cut corners, any two or more of the upper left cut corner, upper right cut corner, lower left cut corner, and lower right cut corner of the rectangle may exist at the same time, which is not limited in the embodiments of the present application.

[0030] Optionally, the N electromagnetic bandgap units may also be square, circular, elliptical or other shaped cut-corner protrusion structures, which is not limited in the embodiments of the present application.

[0031] In a possible implementation manner, the intervals between two groups of adjacent electromagnetic band gap units among the N electromagnetic band gap units are the same.

[0032] In an embodiment of the present application, a possible specific implementation of N electromagnetic band gap units is provided, specifically, the spacing between two groups of adjacent electromagnetic band gap units in the N electromagnetic band gap units is the same. It can be understood that, in the case where the cross-sectional shapes of two adjacent electromagnetic band gap units in the N electromagnetic band gap units are different, or in the case where the N electromagnetic band gap units are arranged in a mirror-symmetrical manner, or in the case where the cross-sectional areas of two adjacent electromagnetic band gap units in the N electromagnetic band gap units are different, or in the case where the N electromagnetic band gap units are rectangular cut-corner protrusion structures, the spacing between two groups of adjacent electromagnetic band gap units in the N electromagnetic band gap units is the same, and can also meet the requirements of being non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can prevent the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0033] Optionally, the spacing between the two groups of adjacent electromagnetic band gap units can be understood as the spacing between the center points of the two groups of adjacent electromagnetic band gap units, or can be understood as the spacing between the edges of the two groups of adjacent electromagnetic band gap units, which is not limited in the embodiments of the present application.

[0034] In a possible implementation manner, there are three structural forms of the N electromagnetic bandgap units, and N=7.

[0035] In an embodiment of the present application, a possible specific implementation of N electromagnetic bandgap units is provided, specifically, there are three structural forms of the N electromagnetic bandgap units, and N=7, that is, the waveguide device in the embodiment of the present application includes a first waveguide and 7 electromagnetic bandgap units of three structural forms, and the 7 electromagnetic bandgap units of three structural forms are located between the first waveguide and the antenna device, and the 7 electromagnetic bandgap units of three structural forms are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0036] In a possible implementation manner, the N electromagnetic band gap units have the same length along a first direction, where the first direction is a direction in which signals are transmitted in the first waveguide.

[0037] In an embodiment of the present application, a possible specific implementation of N electromagnetic band gap units is provided, specifically, the lengths of the N electromagnetic band gap units along the direction of signal transmission in the first waveguide are the same, which can be understood as the N electromagnetic band gap units are of the same height, forming an electromagnetic stop band to block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device.

[0038] In a possible implementation manner, at least two electromagnetic bandgap units among the N electromagnetic bandgap units have different lengths along a second direction, and the second direction is perpendicular to a direction in which signals are transmitted in the first waveguide.

[0039] In an embodiment of the present application, a possible specific implementation of N electromagnetic band gap units is provided, specifically, there are at least two electromagnetic band gap units among the N electromagnetic band gap units with different lengths in a direction perpendicular to the signal transmission direction in the first waveguide. It can be understood that there are at least two electromagnetic band gap units among the N electromagnetic band gap units with unequal lengths, forming an electromagnetic stop band, so as to solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0040] In a possible implementation manner, the edge spacing between any two adjacent electromagnetic band gap units among the N electromagnetic band gap units satisfies the following condition: 0.15λ≤a≤0.3λ;

[0041] Wherein, a is the edge distance between any two adjacent electromagnetic band gap units among the N electromagnetic band gap units, and λ is the vacuum wavelength of the electromagnetic wave transmitted in the first waveguide.

[0042] In an embodiment of the present application, a possible specific implementation of N electromagnetic band gap units is provided, specifically, the edge spacing between any two adjacent electromagnetic band gap units among the N electromagnetic band gap units satisfies the range of 0.15λ to 0.3λ, forming an electromagnetic stop band to block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device.

[0043] Optionally, the edge distance between any two adjacent electromagnetic band gap units may be understood as the closest edge distance between any two adjacent electromagnetic band gap units.

[0044] In a possible implementation manner, the first waveguide is a ridge waveguide.

[0045] In an embodiment of the present application, a possible specific implementation of a first waveguide is provided, specifically, the first waveguide is a barren waveguide, and further, the first waveguide is a ridge waveguide of a radio frequency chip, and the radio frequency signal is transmitted from the ridge waveguide port (i.e., the first waveguide port) of the radio frequency chip to the antenna device after passing through N non-periodically arranged electromagnetic band gap units, so that reliable transmission of the signal from the ridge waveguide port of the radio frequency chip to the waveguide feed port of the antenna device can be achieved, thereby improving the signal transmission performance and the robustness of the ridge waveguide port of the radio frequency chip and the waveguide feed port of the antenna device.

[0046] In a possible implementation, the N electromagnetic band gap units are arranged on the antenna device side or the first waveguide side.

[0047] In the embodiment of the present application, a possible specific implementation of N electromagnetic band gap units is provided, specifically, the N electromagnetic band gap units are arranged on the antenna device side or the first waveguide side. It can be understood that as long as the N electromagnetic band gap units are located between the first waveguide and the antenna device, and the non-periodic arrangement is satisfied to form an electromagnetic stop band, the N electromagnetic band gap units can be arranged on the antenna device side or on the first waveguide, and both can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0048] In a second aspect, an embodiment of the present application provides a transceiver device, which includes M waveguide devices as described in the first aspect or any possible implementation of the first aspect, where M is an integer greater than 1.

[0049] In an embodiment of the present application, a transceiver device is provided, which can be applied to a millimeter wave radar or a millimeter wave radar system. The transceiver device includes a plurality of waveguide devices as described in the first aspect or any possible implementation manner of the first aspect.

[0050] Optionally, the transceiver device in the embodiment of the present application can be a multi-channel (i.e., multiple waveguide devices) switching structure formed by the above-mentioned single channel (i.e., a single waveguide device) after overall rotation, replication and translation, which is located between the waveguide outlet of the RF chip and the antenna device, and is non-periodically arranged around the waveguide outlet of the RF chip to form an electromagnetic resistance band, so as to block the signal transmitted in the waveguide of the RF chip from leaking at the connection between the RF chip waveguide outlet and the antenna device, thereby achieving reliable transmission of the signal from the RF chip waveguide outlet to the waveguide feed of the antenna device, solving the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps, and improving the signal transmission performance and the robustness of the RF chip waveguide outlet and the waveguide feed of the antenna device.

[0051] In a possible implementation manner, the M waveguide devices are arranged non-periodically.

[0052] In an embodiment of the present application, a possible specific implementation of M waveguide devices is provided, specifically, the M waveguide devices are arranged non-periodically. In this case, the M waveguide devices are non-periodically arranged around the waveguide outlet of the RF chip to form an electromagnetic resistance band, which can block the signal transmitted in the RF chip waveguide from leaking at the connection between the RF chip waveguide outlet and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0053] In a possible implementation manner, the M waveguide devices are arranged in a mirror-symmetrical manner.

[0054] In an embodiment of the present application, a possible specific implementation of M waveguide devices is provided, specifically, the M waveguide devices are arranged in a mirror-symmetrical manner. In this case, the M waveguide devices are non-periodically arranged around the waveguide outlet of the RF chip to form an electromagnetic resistance band, which can block the signal transmitted in the waveguide cavity of the RF chip from leaking at the connection between the waveguide outlet of the RF chip and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0055] In a possible implementation manner, center points of the M waveguide devices are not on a straight line.

[0056] In an embodiment of the present application, a possible specific implementation of M waveguide devices is provided. Specifically, the center points of the M waveguide devices are not on a straight line. In this case, the M waveguide devices are non-periodically arranged around the waveguide outlet of the RF chip to form an electromagnetic resistance band, which can block the signal transmitted in the RF chip waveguide from leaking at the connection between the RF chip waveguide outlet and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0057] In a possible implementation manner, two waveguide devices among the M waveguide devices have different structures.

[0058] In an embodiment of the present application, a possible specific implementation of M waveguide devices is provided. Specifically, there are two waveguide devices with different structures among the M waveguide devices. In this case, the M waveguide devices are non-periodically arranged around the waveguide outlet of the RF chip to form an electromagnetic resistance band, which can block the signal transmitted in the RF chip waveguide from leaking at the connection between the RF chip waveguide outlet and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0059] Optionally, there are two waveguide devices among the M waveguide devices with different structures. The two waveguide devices can be understood as two waveguide devices formed by overall rotation, replication and translation of the single waveguide device described in the first aspect or any possible embodiment of the first aspect, and are non-periodically arranged around the waveguide outlet of the RF chip.

[0060] In a possible implementation, the transceiver device further includes a frame, and the frame is disposed on the periphery of the M waveguide devices.

[0061] In an embodiment of the present application, a transceiver device is provided, and the transceiver device further includes a surrounding frame, which is arranged at the periphery of the M waveguide devices. Through the embodiment of the present application, a surrounding frame is arranged along the periphery of the M waveguide devices to form a cavity, which can destroy the transmission conditions of the surface waves when there is a certain gap between the installation surfaces corresponding to the transceiver device, improve the isolation between different channels, and solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gap.

[0062] Optionally, the enclosure may be a metal enclosure.

[0063] In a possible implementation manner, the geometric center of the surrounding frame is the same as the geometric center of the M waveguide devices.

[0064] In an embodiment of the present application, a possible specific implementation of a frame is provided, specifically, the geometric center of the frame is the same as the geometric center of M waveguide devices, and a cavity can be formed. When there is a certain gap between the mounting surfaces corresponding to the transceiver devices, the transmission conditions of the waves on the surface are destroyed, and the isolation between different channels (i.e., different waveguide devices) is improved to solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0065] In a possible implementation, a length of the surrounding frame along a first direction is the same as a length of the waveguide device along the first direction, and the first direction is a direction of signal transmission in the waveguide device.

[0066] In an embodiment of the present application, a possible specific implementation of a frame is provided, specifically, the length of the frame along the direction of signal transmission in the waveguide device is the same as the length of the waveguide device along the direction of signal transmission in the waveguide device. It can be understood that the frame is at the same height as the electromagnetic band gap units in the M waveguide devices to form a cavity, which destroys the surface wave transmission conditions when there is a certain gap between the mounting surfaces corresponding to the transceiver devices, improves the isolation between different channels (i.e., different waveguide devices), and solves the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0067] In a possible implementation manner, the surrounding frame is a continuous surrounding frame; or, the surrounding frame is a surrounding frame with one or more gaps.

[0068] In the implementation manner of the present application, a possible specific implementation manner of a frame is provided. Specifically, the frame may be a continuous frame or a frame with one or more gaps, and the implementation manner of the present application does not limit this.

[0069] It can be understood that when the frame is a frame with one or more gaps, the cavity formed by it must meet the transmission conditions of the surface waves destroyed when there is a certain gap on the installation surface corresponding to the transceiver device, so as to improve the isolation between different channels (i.e., different waveguide devices). As for the length, number, etc. of the gaps in the frame, the implementation mode of the present application does not limit this.

[0070] In a possible implementation manner, the distance between the inner wall of the enclosure and the waveguide device at the edge satisfies the following condition: 0.25λ≤b≤0.5λ;

[0071] Wherein, b is the distance between the inner wall of the frame and the waveguide device at the edge, and λ is the vacuum wavelength of the electromagnetic wave transmitted in the waveguide device.

[0072] In an embodiment of the present application, a possible specific implementation of a frame is provided, specifically, the spacing between the inner wall of the frame and the waveguide device at the edge satisfies 0.25λ to 0.5λ to form a cavity, which destroys the transmission conditions of the surface waves when there is a certain gap on the mounting surface corresponding to the transceiver device, thereby improving the isolation between different channels (i.e., different waveguide devices).

[0073] Optionally, the distance between the inner wall of the frame and the waveguide device at the edge may be understood as the closest margin distance between the inner wall of the frame and the waveguide device at the edge.

[0074] In a possible implementation manner, a groove is arranged along the third direction, and the groove is located between two adjacent waveguide devices;

[0075] The third direction is parallel to a longer side of a cross section of the waveguide device in a first direction, and the first direction is a direction of signal transmission in the waveguide device.

[0076] In an embodiment of the present application, a possible specific implementation of a groove is provided, specifically, a groove is arranged parallel to a longer side of a cross section of a waveguide device in a signal transmission direction in the waveguide device, and the groove is located between two adjacent waveguide devices.

[0077] It can be understood that since the waveguide device is located between the RF chip waveguide outlet and the antenna device, it is used to block the signal transmitted in the waveguide of the RF chip from leaking at the connection between the RF chip waveguide outlet and the antenna device, and the above-mentioned groove is located between two adjacent waveguide devices. Therefore, the groove can be understood as a shallow groove structure that is sunken inward in the direction of the longer side of the waveguide feed port of the antenna device, which can effectively block the surface current of the waveguide feed plane and improve the isolation between different channels (i.e., different waveguide devices).

[0078] In a possible implementation manner, the distance between the groove and the center point of the waveguide device satisfies the following condition: 0.2λ≤c≤0.3λ;

[0079] Wherein, c is the distance between the groove and the center point of the waveguide device, and λ is the vacuum wavelength of the electromagnetic wave transmitted in the waveguide device.

[0080] In an embodiment of the present application, a possible specific implementation of a groove is provided, specifically, the distance between the groove and the center point of the waveguide device is between 0.2λ and 0.3λ, so as to effectively block the surface current of the waveguide feed plane and improve the isolation between different channels (i.e., different waveguide devices).

[0081] In a possible implementation manner, the depth of the groove satisfies the following condition: 0.1λ≤d≤0.2λ;

[0082] Wherein, d is the depth of the groove, and λ is the vacuum wavelength of the electromagnetic wave transmitted in the waveguide device.

[0083] In an embodiment of the present application, a possible specific implementation of a groove is provided, specifically, the depth of the groove satisfies 0.1λ to 0.2λ, so as to effectively block the surface current of the waveguide feed plane and improve the isolation between different channels (ie, different waveguide devices).

[0084] In a third aspect, an embodiment of the present application provides a chip, which includes the waveguide device described in the first aspect or any possible implementation of the first aspect, or includes the transceiver device described in the second aspect or any possible implementation of the second aspect.

[0085] In a fourth aspect, an embodiment of the present application provides a radar or a radar system, which includes the waveguide device described in the first aspect or any possible embodiment of the first aspect, or includes the transceiver device described in the second aspect or any possible embodiment of the second aspect, or includes the chip described in the third aspect.

[0086] In a possible implementation, the radar includes but is not limited to a millimeter wave radar.

[0087] In a possible implementation, there may be a smart sensor integrating multiple sensors. When the smart sensor includes but is not limited to a millimeter wave detection function, the smart sensor may also be referred to as a radar or a radar system.

[0088] In a fifth aspect, an embodiment of the present application provides a terminal device, which includes the waveguide device described in the first aspect or any possible embodiment of the first aspect, or includes the transceiver device described in the second aspect or any possible embodiment of the second aspect, or includes the chip described in the third aspect, or includes the radar or radar system described in the fourth aspect.

[0089] In the sixth aspect, an embodiment of the present application provides a vehicle end, which includes the waveguide device described in the first aspect or any possible embodiment of the first aspect, or includes the transceiver device described in the second aspect or any possible embodiment of the second aspect, or includes the chip described in the third aspect, or includes the radar or radar system described in the fourth aspect, or includes the terminal equipment described in the fifth aspect.

[0090] In the embodiment of the present application, the non-periodic electromagnetic band gap unit setting can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps, achieve reliable transmission of signals from the waveguide outlet of the RF chip to the waveguide feed of the antenna device, and improve the signal transmission performance and the robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be 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.

[0092] Figure 1 A schematic diagram of radar distribution provided in an embodiment of the present application;

[0093] Figure 2 A schematic diagram of the architecture of a radar provided in an embodiment of the present application;

[0094] Figure 3 A schematic diagram of the architecture of a radar provided in an embodiment of the present application;

[0095] Figure 4 A schematic diagram of the structure of a waveguide device provided in an embodiment of the present application;

[0096] Figure 5A A three-dimensional stereogram of a waveguide device provided in an embodiment of the present application;

[0097] Figure 5B A schematic diagram of an application scenario of a waveguide device provided in an embodiment of the present application;

[0098] Figure 5C A schematic diagram of a mounting surface of a waveguide device provided in an embodiment of the present application;

[0099] Fig. 6A A schematic structural diagram of another waveguide device provided in an embodiment of the present application;

[0100] Figure 6B A schematic structural diagram of another waveguide device provided in an embodiment of the present application;

[0101] Figure 6C A schematic structural diagram of another waveguide device provided in an embodiment of the present application;

[0102] Figure 7 A schematic diagram of the structure of a transceiver device provided in an embodiment of the present application;

[0103] Fig. 8A A schematic diagram of the structure of a transceiver device provided in an embodiment of the present application;

[0104] Figure 8B A schematic diagram of the structure of a transceiver device provided in an embodiment of the present application;

[0105] Figure 8C A schematic diagram of the structure of a transceiver device provided in an embodiment of the present application;

[0106] Fig. 9 A schematic diagram of the structure of a transceiver device provided in an embodiment of the present application;

[0107] Fig. 10A A three-dimensional stereogram of a transceiver device provided in an embodiment of the present application;

[0108] Fig. 10B A plan view of a transceiver device provided in an embodiment of the present application;

[0109] Fig.11A A schematic diagram of the effect of return loss provided in an embodiment of the present application;

[0110] Fig. 11B A schematic diagram of an insertion loss effect provided in an embodiment of the present application;

[0111] Fig. 11C A schematic diagram of an isolation effect provided in an embodiment of the present application;

[0112] Fig. 12A A schematic diagram of an isolation effect provided in an embodiment of the present application;

[0113] Fig. 12B A schematic diagram of an isolation effect provided in an embodiment of the present application;

[0114] Fig. 12CA schematic diagram of the isolation effect provided in an embodiment of the present application. DETAILED DESCRIPTION

[0115] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0116] The terms "first" and "second" in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0117] The "embodiment" mentioned in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places 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 can be explicitly and implicitly understood by those skilled in the art that in the various embodiments of the present application, if there is no special explanation and logical conflict, the terms and / or descriptions between the various embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0118] It should be understood that in the present application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three and more than three, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0119] As described in the background technology section, the waveguide outlet of the RF chip currently adapted for the waveguide antenna is a rectangular waveguide outlet, and the RF chip waveguide outlet needs to be vertically docked with the waveguide feed of the antenna device to achieve vertical signal transmission. Since the vertical docking of the RF chip waveguide outlet and the waveguide feed of the antenna device is prone to installation deviation and gaps during engineering implementation, the signal transmission performance is greatly deteriorated or even fails, resulting in low robustness of the RF chip waveguide outlet and the waveguide feed of the antenna device. The present application provides a waveguide device and related products, relating to the field of millimeter wave radar technology, to achieve reliable transmission of signals from the RF chip waveguide outlet to the waveguide feed of the antenna device, and to improve the signal transmission performance and the robustness of the RF chip waveguide outlet and the waveguide feed of the antenna device.

[0120] In order to more clearly describe the solution of the present application, some knowledge related to radar is first introduced below.

[0121] Radar is the transliteration of the English word Radar, which is derived from the abbreviation of "radio detection and ranging", meaning "radio detection and ranging". It uses radio methods to detect targets and determine the spatial position of the target.

[0122] The detection medium of radar is electromagnetic waves. It uses the emission and reception of electromagnetic waves to detect targets, for example, distance measurement, speed measurement, or azimuth measurement. Radar can measure the distance of targets based on the flight time of electromagnetic waves. The flight time is the time difference between the transmission and reception of electromagnetic waves. The radar transmits an electromagnetic wave signal and receives the echo signal of the electromagnetic wave signal. The distance of the target can be measured based on the time difference between the received echo signal and the transmitted electromagnetic wave signal and the propagation speed of the electromagnetic wave. The distance between the radar and the target can be determined based on the following formula: s = c*t / 2, where s is the distance of the target, t is the flight time, that is, the time from the electromagnetic wave signal being emitted by the radar to the echo signal being received, and c is the speed of light.

[0123] Radar measures the speed of a target based on the Doppler effect. The principle of the Doppler effect is as follows: when a vibration source such as sound, light, and radio waves moves relative to an observer at a relative speed, the vibration frequency received by the observer is different from the frequency emitted by the vibration source. When the electromagnetic waves emitted by the radar and the detected target move relative to each other, the frequency of the echo signal will be different from the frequency of the emitted electromagnetic wave signal. When the target approaches the radar antenna, the frequency of the echo signal will be higher than the frequency of the emitted electromagnetic wave signal; conversely, when the target moves away from the radar antenna, the frequency of the echo signal will be lower than the frequency of the emitted electromagnetic wave signal. The frequency change caused by the Doppler effect is called the Doppler shift, which is proportional to the relative speed and inversely proportional to the vibration frequency. Therefore, by detecting the frequency difference between the emitted electromagnetic wave signal and the echo signal, the moving speed of the target relative to the radar, that is, the relative speed between the target and the radar, can be measured.

[0124] Radar can use amplitude method, phase method and other methods to measure azimuth. The amplitude method uses the amplitude value of the echo signal received by the antenna to measure the angle. The changing pattern of the amplitude value depends on the antenna radiation pattern and the antenna scanning method. The phase method uses the phase difference between the echo signals received by multiple antenna units to measure the angle. For example, the radar receives the echo signal reflected by the same target through the antenna array, and calculates the azimuth of the target based on the phase difference of the echo signal.

[0125] The detection medium of millimeter wave radar is electromagnetic waves within a certain wavelength range, such as microwaves. Currently, millimeter waves and centimeter waves adjacent to millimeter wave bands (for example, centimeter waves in the 24GHz band) are more commonly used. Millimeter waves are electromagnetic waves with a wavelength of 1 to 10 millimeters (mm), and the wavelength of electromagnetic waves in the 24GHz band is slightly greater than 10mm. Since the wavelength of the detection medium of millimeter wave radar is in the wavelength range where microwaves and far infrared waves overlap, it has the characteristics of both spectra. According to the wave propagation theory, the higher the frequency, the shorter the wavelength, the higher the resolution, the stronger the penetration ability, but the greater the loss in the propagation process, and the shorter the transmission distance; relatively, the lower the frequency, the longer the wavelength, the stronger the diffraction ability, and the longer the transmission distance. Therefore, compared with microwaves, the detection medium of millimeter wave radar has high resolution, good directivity, strong anti-interference ability and good detection performance. Compared with infrared, the detection medium of millimeter wave radar has low atmospheric attenuation, better penetration of smoke and dust, and is less affected by weather. Therefore, millimeter-wave radar has been increasingly widely used in many fields such as smart vehicles, drones, smart transportation, and industrial automation.

[0126] Radar can be divided into long range radar (LRR), mid / medium range radar (MRR) and short range radar (SRR) according to the distance of its detection distance. LRR has higher requirements for detection distance, but relatively lower requirements for detection angular width. SRR has relatively lower requirements for detection distance, but higher requirements for detection angular width. MRR's requirements for detection distance and angular width can be understood as between LRR and SRR. For example, the detection distance of LRR can reach more than 200 meters, and the angular width can be ±15°; the detection distance of MRR can be within 100 meters, and the angular width can be ±45°; the detection distance of SRR can be within 60 meters, and the angular width can be ±80°. In use, different types of Radar can be installed at different positions of the vehicle body according to the functional requirements of autonomous driving and the use of other sensors. The number and type of Radar can be selected as needed.

[0127] See also Figure 1 , Figure 1 A schematic diagram of radar distribution provided in an embodiment of the present application.

[0128] Figure 1 Possible installation locations of several types of Radar are given, which are only examples. In actual use, more or less numbers of Radars can be selected, and the types can also be adjusted.

[0129] like Figure 1 As shown, LRR can be installed in front of the vehicle body as a forward radar; MRR can be installed in front of and behind the vehicle body as a forward radar and a rear radar; SRR can be installed on the side of the vehicle body or at the four corners of the vehicle body as a side radar and a corner radar. In addition, MRR can also be installed on the side of the vehicle body or at the four corners of the vehicle body, and SRR can also be installed in front of or behind the vehicle body.

[0130] Radar can be classified according to the modulation method (or radiation method) of its electromagnetic wave. The modulation method of Radar's electromagnetic wave includes pulse method and continuous wave method, so Radar can be divided into pulse radar and continuous wave radar. The continuous wave method can be further divided into frequency shift keying (FSK), phase shift keying (PSK), constant frequency / single frequency continuous wave (continuous wave CW), frequency modulated continuous wave (FMCW), multiple frequency shift keying (MFSK), phase modulated continuous wave (PMCW) and other methods. FMCW has become the mainstream radar modulation method because it can detect multiple targets, has high resolution and low cost.

[0131] See also Figure 2 , Figure 2 A schematic diagram of the architecture of a radar provided in an embodiment of the present application.

[0132] like Figure 2 As shown, the Radar includes a control circuit 110, a signal generator 120, a power amplifier (PA) 130, a low noise amplifier (LNA) 140, a mixer 150, a filter 160, an analog-to-digital converter (ADC) 170, and a signal processor 180. The signal processor is usually used to process digital signals, such as a digital signal processor (DSP). The signal generator 120 generates an electromagnetic wave signal (also called a radar signal) waveform under the control of the control circuit 110. For example, a Radar using FMCW modulation generates a sawtooth wave or a triangle wave under the control of the control circuit 110. The signal generator 120 is, for example, a voltage-controlled oscillator, and the control circuit 110 is used to generate a control voltage. The generated electromagnetic wave signal waveform is modulated to a desired frequency band, such as between 76 GHz and 77 GHz, and after being amplified by the PA 130, it is radiated into space through a transmitting antenna (TX).

[0133] The electromagnetic wave signal radiated by the transmitting antenna is reflected into space after irradiating the target, and is received by the receiving antenna (RX) of the Radar. After being amplified by the LNA140, it is mixed with the reference signal by the mixer 150. The reference signal can usually use the electromagnetic wave signal generated above. After the mixer 150 is filtered by the filter 160, an analog baseband signal can be obtained, and a digital baseband signal is obtained by sampling through the ADC 170. The digital baseband signal is processed in the signal processor 180 to obtain the distance, speed, and angle information of the target. In addition, the obtained information can be used for clustering and / or tracking, etc., to further obtain the trajectory, size, type and other information of the target.

[0134] The various components of the above Radar can be integrated as needed to achieve miniaturization of the radar. For example, the control circuit 110, the signal generator 120, the power amplifier (PA) 130, the low noise amplifier (LNA) 140, the mixer 150, the filter 160, the analog-to-digital converter (ADC) 170 and other components can be integrated on at least one chip, for example, integrated into a monolithic microwave integrated circuit (MMIC).

[0135] For details, please refer to Figure 3 , Figure 3 A schematic diagram of the architecture of a radar provided in an embodiment of the present application.

[0136] like Figure 3 As shown, the Radar includes MMIC, a microcontroller unit (MCU), and a power management integrated circuit (PMIC). The MMIC can integrate the functions of the radio frequency part, and the MCU can integrate the functions of the above baseband part, such as integrating the functions of the above signal processor. In addition, it can also provide a communication interface for communicating with other on-board devices. The PMIC is a chip that supplies power to the radar hardware system.

[0137] Waveguide: A structure used to guide electromagnetic waves in a directional manner. In electromagnetics and communications engineering, a waveguide can refer to any linear structure that transmits electromagnetic waves between its endpoints. Waveguides are mainly used as transmission lines for microwave frequencies, and are used to connect microwave transmitters and receivers to their antennas in radar, communication satellites, and microwave radio link equipment. Figure 3 It can be seen that the waveguide is used to Figure 3The microwave transmitter integrated in the MMIC shown is connected to the corresponding transmitting antenna to transmit Figure 3 The microwave receiver integrated in the MMIC shown is connected to a corresponding receiving antenna to transmit microwave frequencies.

[0138] Electromagnetic band gap (EBG) structure: a periodic structure that can prevent the propagation of electromagnetic waves of a specific frequency. The periodic structure unit can be equivalent to a parallel LC circuit. The parallel LC circuit resonates near the resonant frequency W0. The resonant frequency W0 depends on the structural size and spacing of the EBG unit. The impedance is infinite at resonance, that is, it presents a high impedance state to the electromagnetic waves at this frequency. Therefore, the electromagnetic band gap structure placed between the two antenna devices can effectively improve the isolation between the two antenna devices. Common devices based on this principle also include: artificial magnetic conductors (AMC), defective ground structures, frequency selective surfaces (FSS) and metamaterials.

[0139] In millimeter-wave radar systems, three-dimensional waveguide antennas have obvious advantages over flat printed circuit board (PCB) printed antennas in terms of loss and broadband characteristics. The RF chip output line adapted to the PCB printed antenna is a microstrip line, which is the same as the feeder form of the antenna device. After the two are connected on the same layer, the signal is transmitted horizontally. The waveguide outlet of the RF chip adapted to the waveguide antenna is a rectangular waveguide outlet, which needs to be vertically connected to the waveguide feeder of the antenna device at the RF chip waveguide outlet to achieve vertical signal transmission.

[0140] However, during engineering implementation, it is easy for installation deviation and gap to occur at the point where the waveguide outlet of the RF chip vertically connects with the waveguide feed of the antenna device, resulting in a significant deterioration of signal transmission performance or even failure, thereby causing low robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device.

[0141] Currently, a mushroom-shaped EBG unit or a metal protrusion-shaped EBG unit is often used to realize signal transmission from the waveguide outlet of the RF chip to the waveguide feed port of the antenna device.

[0142] Among them, the EBG unit of the mushroom-shaped structure is formed by PCB process. The EBG unit is composed of a metal patch on the upper surface, a central metal hole and a metal floor. It is arranged strictly according to a certain period to achieve the function of blocking signal transmission. This structural form is mostly used between or around antenna arrays to achieve decoupling between antennas and improve isolation.

[0143] The EBG units of the metal protrusion structure are machined or molded. The EBG units are individual metal protrusions. The same EBG units are arranged periodically to achieve the function of blocking signal transmission. This structural form is mostly used in the design of waveguide feeding networks and adapter side walls to improve the insertion loss, isolation and other performance of signal transmission.

[0144] However, the above-mentioned signal transfer structures for realizing the connection from the waveguide outlet of the RF chip to the waveguide feed of the antenna device are prone to installation deviation and gaps in engineering implementation, resulting in a significant deterioration of signal transmission performance or even failure, thereby causing low robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device.

[0145] In view of this, the present application provides a waveguide device and related products, which relate to the field of millimeter wave radar technology, and can effectively solve the above-mentioned problems, realize the reliable transmission of signals from the waveguide outlet of the RF chip to the waveguide feed of the antenna device, and improve the signal transmission performance and the robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device.

[0146] The waveguide device and transceiver device provided in the present application will be described below with reference to the accompanying drawings.

[0147] See also Figure 4 , Figure 4 A schematic structural diagram of a waveguide device provided in an embodiment of the present application.

[0148] like Figure 4 As shown, the waveguide device comprises:

[0149] A first waveguide 101 and N electromagnetic bandgap units (201, 202, 203, 204, 205, 206, 207).

[0150] Wherein, N is an integer greater than 0.

[0151] For example, in Figure 4 In the waveguide device shown, N=7, and accordingly, the N electromagnetic bandgap units include 201 , 202 , 203 , 204 , 205 , 206 , and 207 .

[0152] It should be understood that N=7 here is only used as an exemplary description and should not be used to limit the embodiments of the present application. N can also be other integers greater than 0, and the embodiments of the present application are not limited to this.

[0153] For example, in Figure 4 In the waveguide device shown, the N EBG units include 3 different structural forms in total, wherein the EBG units 201 and 203 are of the same structural form, the EBG units 204 and 207 are of the same structural form, and the EBG units 202, 205, and 206 are of the same structural form.

[0154] It should be understood that the three structural forms presented by the N electromagnetic bandgap units here are only for exemplary description and should not be used to limit the embodiments of the present application. The N electromagnetic bandgap units may also present other different numbers of structural forms, which are not limited by the embodiments of the present application.

[0155] The first waveguide 101 is a structure for directional guiding electromagnetic waves. The specific structural form of the first waveguide 101 is not limited in the present embodiment. The first waveguide 101 is mainly used as a transmission line of microwave frequency, and is used to connect microwave transmitters and receivers with their antennas in radars, communication satellites and microwave radio link equipment. For example, when the waveguide device in the embodiment of the present application is used in a radar, the above Figure 3 , the first waveguide 101 is used to Figure 3 The microwave transmitter integrated in the MMIC shown is connected to the corresponding transmitting antenna. The first waveguide 101 is used to connect Figure 3 The microwave receiver integrated in the MMIC shown is connected to a corresponding receiving antenna for transmission of microwave frequencies.

[0156] Signal transmission is performed between the first waveguide and the antenna device. The N electromagnetic bandgap units are located between the first waveguide and the antenna device and are non-periodically arranged around the first waveguide to form an electromagnetic stop band for blocking the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device.

[0157] Understandably, Figure 4 The structural schematic diagram of the waveguide device shown in FIG. 1 can be regarded as a top view of the waveguide device. The corresponding three-dimensional structure can be specifically referred to in FIG. Figure 5A , Figure 5A A three-dimensional stereogram of a waveguide device provided in an embodiment of the present application.

[0158] like Figure 5A As shown, Figure 5A (1) is a schematic diagram of the layered structure of the three-dimensional waveguide device, which is mainly divided into three layers: upper, middle and lower. The middle layer includes 7 electromagnetic bandgap units (201, 202, 203, 204, 205, 206, 207), which correspond to the above Figure 4 The 7 electromagnetic bandgap units in the lower layer include a single-channel ridge waveguide 111 on the RF chip side, corresponding to the above Figure 4The first waveguide 101 in the upper layer includes a single-channel rectangular cross-section waveguide 112 on the antenna device side. The seven electromagnetic bandgap units are located between the ridge waveguide 111 on the RF chip side and the rectangular cross-section waveguide 112 on the antenna device side, and are non-periodically arranged around the ridge waveguide opening on the RF chip side and / or the rectangular cross-section waveguide opening on the antenna device side, forming an electromagnetic stop band, which is used to block the signal transmitted in the ridge waveguide on the RF chip side from leaking at the connection between the ridge waveguide opening on the RF chip side and the rectangular cross-section waveguide opening on the antenna device side.

[0159] exist Figure 5A In the waveguide device shown in (1), the RF signal is transmitted from the ridge waveguide port of the RF chip to the rectangular cross-section waveguide on the antenna device side after passing through the electromagnetic stop band formed by 7 non-periodically arranged electromagnetic bandgap units. This can solve the problem of significant deterioration or even failure of signal transmission performance caused by installation deviation and gap between the ridge waveguide port on the RF chip side and the rectangular cross-section waveguide port on the antenna device side, realize reliable transmission of signals from the RF chip waveguide port to the waveguide feed port of the antenna device, and improve the signal transmission performance and the robustness of the RF chip waveguide port and the waveguide feed port of the antenna device.

[0160] It is understandable that Figure 5A After installing the various hierarchical structures shown in (1) in the figure, we can get Figure 5A The schematic diagram of the combined structure of the waveguide device shown in (2) in the figure can solve the problem of significant deterioration or even failure of signal transmission performance caused by installation deviation and gap between the ridge waveguide port on the RF chip side and the rectangular cross-section waveguide port on the antenna device side.

[0161] It is understandable that the above Figure 4 and Figure 5A The waveguide device shown can be applied to, but is not limited to, the above Figures 1 to 3 In the millimeter wave radar or millimeter wave radar system shown.

[0162] For details, please refer to Figure 5B , Figure 5B A schematic diagram of an application scenario of a waveguide device provided in an embodiment of the present application.

[0163] like Figure 5B As shown above Figure 4 and Figure 5A The waveguide device shown is applied to a millimeter-wave radar or a millimeter-wave radar system scenario, which is a schematic structural diagram of a single channel of the millimeter-wave radar or the millimeter-wave radar system.

[0164] The structure of the single channel mainly includes a radio frequency chip 10, a chip waveguide cavity 20, a PCB board 40, a PCB transition waveguide cavity 30, an electromagnetic stop band 50, a waveguide feeder cavity 60 of an antenna device, and an antenna cavity 70 of an antenna device. It can be understood that Figure 5B The electromagnetic resistance band 50 includes the above Figure 4 and Figure 5A N electromagnetic bandgap units in the waveguide device shown.

[0165] The RF chip 10 and the chip waveguide cavity 20 can be regarded as a whole, and the chip waveguide cavity 20 can be regarded as a waveguide cavity in the RF chip 10. The PCB board 40 and the PCB transition waveguide cavity 30 can be regarded as a whole, and the PCB transition waveguide cavity 30 can be regarded as a waveguide cavity in the PCB board 40.

[0166] The chip waveguide cavity 20, the PCB transition waveguide cavity 30, the electromagnetic resistance band 50, the waveguide feeder cavity 60 of the antenna device, and the antenna cavity 70 of the antenna device are sequentially connected to form a single channel of a millimeter wave radar or a millimeter wave radar system. The signal of the RF chip 10 is output from the chip waveguide cavity 20, passes through the PCB transition waveguide cavity 30 and the electromagnetic resistance band 50 in sequence to reach the antenna device side, is input into the antenna device from the waveguide feeder cavity 60 of the antenna device, and is emitted from the antenna cavity 70 of the antenna device.

[0167] Optionally, the chip waveguide cavity 20 and the PCB transition waveguide cavity 30 can also be regarded as a whole, that is, the waveguide cavity on the side of the RF chip 10. The electromagnetic resistance band 50 is located between the waveguide cavity on the side of the RF chip 10 (that is, the first waveguide mentioned above) and the antenna device, and is used to transmit the signal in the waveguide cavity on the side of the RF chip 10 to the antenna device, and to block the signal transmitted in the waveguide cavity on the side of the RF chip 10 from leaking at the connection between the waveguide cavity on the side of the RF chip 10 and the antenna device, so as to realize the reliable transmission of the signal from the waveguide outlet of the RF chip to the waveguide feed of the antenna device.

[0168] At present, the waveguide outlet of the RF chip adapted for the waveguide antenna is a rectangular waveguide outlet, which needs to be vertically connected with the waveguide feed of the antenna device to realize vertical signal transmission. Since the vertical connection between the waveguide outlet of the RF chip and the waveguide feed of the antenna device is prone to installation deviation and gaps during engineering implementation, the signal transmission performance is greatly deteriorated or even fails, resulting in low robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device.

[0169] In the embodiment of the present application, by arranging N electromagnetic bandgap units between the first waveguide and the antenna device, and non-periodically arranging them around the first waveguide to form an electromagnetic stop band, the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps can be solved, and reliable transmission of signals from the waveguide outlet of the RF chip to the waveguide feed of the antenna device can be achieved, thereby improving the signal transmission performance and the robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device.

[0170] Regarding how the N electromagnetic bandgap units in the above waveguide device are non-periodically arranged around the first waveguide, several possible examples are given below:

[0171] Example 1:

[0172] Among the N electromagnetic bandgap units, two adjacent electromagnetic bandgap units have different cross-sectional shapes.

[0173] Optionally, the cross section of the two adjacent electromagnetic band gap units may be a cross section perpendicular to the direction of signal transmission in the first waveguide, or may be a cross section parallel to the direction of signal transmission in the first waveguide, and this embodiment of the present application does not limit this.

[0174] Combination Figure 4 It can be seen from the waveguide device shown that, among the N electromagnetic bandgap units, the adjacent electromagnetic bandgap unit 201 and the electromagnetic bandgap unit 202 have different cross-sectional shapes, the adjacent electromagnetic bandgap unit 204 and the electromagnetic bandgap unit 205 have different cross-sectional shapes, the adjacent electromagnetic bandgap unit 203 and the electromagnetic bandgap unit 207 have different cross-sectional shapes, and so on, which are not listed one by one here.

[0175] Combination Fig. 6A It can be seen from the waveguide device shown that, among the N electromagnetic bandgap units, the adjacent electromagnetic bandgap unit 601 and the electromagnetic bandgap unit 602 have different cross-sectional shapes, the adjacent electromagnetic bandgap unit 604 and the electromagnetic bandgap unit 605 have different cross-sectional shapes, the adjacent electromagnetic bandgap unit 603 and the electromagnetic bandgap unit 607 have different cross-sectional shapes, and so on, which are not listed one by one here.

[0176] Combination Figure 6B It can be seen from the waveguide device shown that, among the N electromagnetic bandgap units, adjacent electromagnetic bandgap unit 608 and electromagnetic bandgap unit 609 have different cross-sectional shapes, adjacent electromagnetic bandgap unit 612 and electromagnetic bandgap unit 613 have different cross-sectional shapes, adjacent electromagnetic bandgap unit 610 and electromagnetic bandgap unit 616 have different cross-sectional shapes, and so on, which are not listed one by one here.

[0177] Combination Figure 6C It can be seen from the waveguide device shown that, among the N electromagnetic bandgap units, adjacent electromagnetic bandgap unit 617 and electromagnetic bandgap unit 618 have different cross-sectional shapes, adjacent electromagnetic bandgap unit 621 and electromagnetic bandgap unit 622 have different cross-sectional shapes, adjacent electromagnetic bandgap unit 620 and electromagnetic bandgap unit 625 have different cross-sectional shapes, and so on, which are not listed one by one here.

[0178] It can be understood that in this example one, among the N electromagnetic band gap units, there are two adjacent electromagnetic band gap units with different cross-sectional shapes, and the N electromagnetic band gap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0179] Example 2:

[0180] The N electromagnetic bandgap units are arranged in a mirror-symmetrical manner.

[0181] Optionally, the N electromagnetic bandgap units are arranged in a mirror-symmetrical manner on a plane perpendicular to the signal transmission direction in the first waveguide.

[0182] Combination Figure 4 It can be seen from the waveguide device shown that the electromagnetic bandgap units 201 , 202 , 204 , 205 and the electromagnetic bandgap units 203 , 202 , 207 , 206 are mirror-symmetric about the dotted line 301 .

[0183] Combination Fig. 6A It can be seen from the waveguide device shown that the electromagnetic bandgap units 601 , 602 , 604 , 605 and the electromagnetic bandgap units 603 , 602 , 607 , 606 are mirror-symmetric about the dotted line 301 .

[0184] Combination Figure 6B It can be seen from the waveguide device shown that the electromagnetic bandgap units 608 , 609 , 611 , 612 , 613 and the electromagnetic bandgap units 610 , 609 , 616 , 615 , 614 are mirror-symmetric about the dotted line 301 .

[0185] Combination Figure 6C It can be seen from the waveguide device shown that the electromagnetic bandgap units 617 , 618 , 621 , 622 , 623 and the electromagnetic bandgap units 620 , 619 , 625 , 624 , 623 are mirror-symmetric about the dotted line 301 .

[0186] It can be understood that in this example two, the N electromagnetic band gap units are arranged in a mirror-symmetrical manner, and the N electromagnetic band gap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0187] Example 3:

[0188] Among the N electromagnetic bandgap units, there are two groups of adjacent electromagnetic bandgap units with different spacings.

[0189] Optionally, the spacing between the two groups of adjacent electromagnetic band gap units can be understood as the spacing between the center points of the two groups of adjacent electromagnetic band gap units, or can be understood as the spacing between the edges of the two groups of adjacent electromagnetic band gap units (ie, the nearest margin), which is not limited in the embodiments of the present application.

[0190] Combination Figure 4 It can be seen from the waveguide device shown that among the N electromagnetic bandgap units, there are adjacent electromagnetic bandgap units 201 and electromagnetic bandgap units 202, and adjacent electromagnetic bandgap units 204 and electromagnetic bandgap units 205, and the spacings between the two groups of adjacent electromagnetic bandgap units are different; there are also adjacent electromagnetic bandgap units 205 and electromagnetic bandgap units 206, and adjacent electromagnetic bandgap units 206 and electromagnetic bandgap units 207, and the spacings between the two groups of adjacent electromagnetic bandgap units are different; there are also adjacent electromagnetic bandgap units 206 and electromagnetic bandgap units 207, and adjacent electromagnetic bandgap units 207 and electromagnetic bandgap units 203, and the spacings between the two groups of adjacent electromagnetic bandgap units are different, and so on, which are not listed one by one here.

[0191] Combination Fig. 6A It can be seen from the waveguide device shown that among the N electromagnetic bandgap units, there are adjacent electromagnetic bandgap units 601 and electromagnetic bandgap units 602, and adjacent electromagnetic bandgap units 604 and electromagnetic bandgap units 605, and the spacings between the two groups of adjacent electromagnetic bandgap units are different; there are also adjacent electromagnetic bandgap units 605 and electromagnetic bandgap units 606, and adjacent electromagnetic bandgap units 606 and electromagnetic bandgap units 607, and the spacings between the two groups of adjacent electromagnetic bandgap units are different; there are also adjacent electromagnetic bandgap units 606 and electromagnetic bandgap units 607, and adjacent electromagnetic bandgap units 607 and electromagnetic bandgap units 603, and the spacings between the two groups of adjacent electromagnetic bandgap units are different, and so on, which are not listed one by one here.

[0192] Combination Figure 6B It can be seen from the waveguide device shown that among the N electromagnetic bandgap units, there are adjacent electromagnetic bandgap units 608 and electromagnetic bandgap units 609, and adjacent electromagnetic bandgap units 612 and electromagnetic bandgap units 613, and the spacings between the two groups of adjacent electromagnetic bandgap units are different; there are also adjacent electromagnetic bandgap units 612 and electromagnetic bandgap units 613, and adjacent electromagnetic bandgap units 613 and electromagnetic bandgap units 614, and the spacings between the two groups of adjacent electromagnetic bandgap units are different; there are also adjacent electromagnetic bandgap units 615 and electromagnetic bandgap units 616, and adjacent electromagnetic bandgap units 616 and electromagnetic bandgap units 610, and the spacings between the two groups of adjacent electromagnetic bandgap units are different, and so on, which are not listed one by one here.

[0193] Combination Figure 6CIt can be seen from the waveguide device shown that among the N electromagnetic bandgap units, there are adjacent electromagnetic bandgap units 617 and electromagnetic bandgap units 618, and adjacent electromagnetic bandgap units 621 and electromagnetic bandgap units 622, and the spacings between the two groups of adjacent electromagnetic bandgap units are different; there are also adjacent electromagnetic bandgap units 621 and electromagnetic bandgap units 622, and adjacent electromagnetic bandgap units 622 and electromagnetic bandgap units 623, and the spacings between the two groups of adjacent electromagnetic bandgap units are different; there are also adjacent electromagnetic bandgap units 624 and electromagnetic bandgap units 625, and adjacent electromagnetic bandgap units 625 and electromagnetic bandgap units 620, and the spacings between the two groups of adjacent electromagnetic bandgap units are different, and so on, which are not listed one by one here.

[0194] It can be understood that in this example three, there are two groups of adjacent electromagnetic band gap units among the N electromagnetic band gap units, and the spacing between them is different. The N electromagnetic band gap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0195] Example 4:

[0196] The N electromagnetic bandgap units are arranged in a rectangular shape around the first waveguide.

[0197] Optionally, the N electromagnetic bandgap units may also be arranged around the first waveguide in a square, circular, elliptical or other shape, as long as they are non-periodically arranged around the first waveguide to form an electromagnetic stop band, and the embodiment of the present application does not limit this.

[0198] Combination Figure 4 It can be seen from the waveguide device shown that the electromagnetic bandgap units 201, 202, 203, 204, 205, 206, and 207 are arranged in a rectangular shape around the first waveguide, and the N electromagnetic bandgap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0199] Combination Fig. 6A It can be seen from the waveguide device shown that the electromagnetic bandgap units 601, 602, 603, 604, 605, 606, and 607 are arranged in a rectangular shape around the first waveguide, and the N electromagnetic bandgap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0200] Combination Figure 6B It can be seen from the waveguide device shown that the electromagnetic bandgap units 608, 609, 610, 611, 612, 613, 614, 615, and 616 are arranged in a rectangular shape around the first waveguide, and the N electromagnetic bandgap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0201] Combination Figure 6C It can be seen from the waveguide device shown that the electromagnetic bandgap units 617, 618, 619, 620, 621, 622, 623, 624, and 625 are arranged in a rectangular shape around the first waveguide, and the N electromagnetic bandgap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0202] Example 5:

[0203] Among the N electromagnetic bandgap units, there are two adjacent electromagnetic bandgap units with different cross-sectional areas.

[0204] Optionally, the cross section of the two adjacent electromagnetic band gap units may be a cross section perpendicular to the direction of signal transmission in the first waveguide, or may be a cross section parallel to the direction of signal transmission in the first waveguide, and this embodiment of the present application does not limit this.

[0205] Combination Figure 4 It can be seen from the waveguide device shown that, among the N electromagnetic band gap units, the cross-sectional areas of the adjacent electromagnetic band gap units 201 and 202 are different, the cross-sectional areas of the adjacent electromagnetic band gap units 201 and 204 are different, the cross-sectional areas of the adjacent electromagnetic band gap units 206 and 207 are different, and so on, which are not listed one by one here.

[0206] Combination Fig. 6A It can be seen from the waveguide device shown that, among the N electromagnetic bandgap units, the cross-sectional areas of adjacent electromagnetic bandgap units 601 and 602 are different, the cross-sectional areas of adjacent electromagnetic bandgap units 601 and 604 are different, the cross-sectional areas of adjacent electromagnetic bandgap units 606 and 607 are different, and so on, which are not listed one by one here.

[0207] Combination Figure 6BIt can be seen from the waveguide device shown that, among the N electromagnetic band gap units, the cross-sectional areas of adjacent electromagnetic band gap units 608 and 609 are different, the cross-sectional areas of adjacent electromagnetic band gap units 608 and 611 are different, the cross-sectional areas of adjacent electromagnetic band gap units 614 and 615 are different, and so on, which are not listed one by one here.

[0208] Combination Figure 6C It can be seen from the waveguide device shown that, among the N electromagnetic band gap units, the cross-sectional areas of adjacent electromagnetic band gap units 617 and 618 are different, the cross-sectional areas of adjacent electromagnetic band gap units 617 and 621 are different, the cross-sectional areas of adjacent electromagnetic band gap units 624 and 625 are different, and so on, which are not listed one by one here.

[0209] It can be understood that in this example five, among the N electromagnetic band gap units, there are two adjacent electromagnetic band gap units with different cross-sectional areas, and the N electromagnetic band gap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0210] Example 6:

[0211] The N electromagnetic bandgap units are rectangular convex structures with cut corners.

[0212] Combination Figure 4 It can be seen from the waveguide device shown that the electromagnetic bandgap units 201, 203, 204, and 207 among the N electromagnetic bandgap units are all rectangular corner-cut protrusion structures.

[0213] Optionally, the N electromagnetic band gap units may be a convex structure with a rectangular cut corner, or may be a convex structure with multiple rectangular cut corners, which is not limited in the present embodiment. When the electromagnetic band gap unit has only one rectangular cut corner, it may be any one of the upper left cut corner, the upper right cut corner, the lower left cut corner, and the lower right cut corner of the rectangle, which is not limited in the present embodiment. For example, Figure 4 The electromagnetic band gap unit 201 in the figure is a rectangular convex structure with a cut corner on the upper left. Figure 4 The electromagnetic band gap unit 203 in the figure is a rectangular convex structure with a right upper cut corner. Figure 4 The electromagnetic band gap unit 204 in the figure is a convex structure with a lower left corner of a rectangle. Figure 4The electromagnetic bandgap unit 207 is a convex structure of a rectangular lower right corner. When the electromagnetic bandgap unit has multiple rectangular corners, any two or more of the upper left corner, upper right corner, lower left corner, and lower right corner of the rectangle may exist at the same time, and the embodiment of the present application does not limit this.

[0214] Combination Fig. 6A The waveguide device shown can be seen, Fig. 6A The electromagnetic band gap unit 604 in the figure is a convex structure with a rectangular lower left corner. Fig. 6A The electromagnetic band gap unit 607 in FIG. 5 is a convex structure with a lower right corner cut off in a rectangle.

[0215] Combination Figure 6B The waveguide device shown can be seen, Figure 6B The electromagnetic bandgap unit 608 in the figure is a convex structure with a rectangular upper left corner cut off. Figure 6B The electromagnetic bandgap unit 610 in FIG. 5 is a convex structure with a rectangular upper right corner cut off.

[0216] Combination Figure 6C The waveguide device shown can be seen, Figure 6C The electromagnetic band gap unit 617 in the figure is a rectangular convex structure with a cut corner on the upper left. Figure 6C The electromagnetic band gap unit 620 in FIG. 5 is a convex structure with a rectangular upper right corner cut off.

[0217] Optionally, the N electromagnetic bandgap units may also be square, circular, elliptical or other shaped cut-corner protrusion structures, which is not limited in the embodiment of the present application.

[0218] Optionally, the N electromagnetic bandgap units may also be rectangular, square, circular, elliptical or other cut-corner protrusion structures with certain arc corners, which is not limited in the embodiment of the present application.

[0219] It can be understood that in this example six, the N electromagnetic band gap units are rectangular cut-corner protrusion structures, and the N electromagnetic band gap units are non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0220] Example 7:

[0221] The spacings between two groups of adjacent electromagnetic bandgap units in the N electromagnetic bandgap units are the same.

[0222] Optionally, the spacing between the two groups of adjacent electromagnetic band gap units can be understood as the spacing between the center points of the two groups of adjacent electromagnetic band gap units, or can be understood as the spacing between the edges of the two groups of adjacent electromagnetic band gap units (ie, the nearest margin), which is not limited in the embodiments of the present application.

[0223] It can be understood that, when the cross-sectional shapes of two adjacent electromagnetic band gap units among the N electromagnetic band gap units are different, or when the N electromagnetic band gap units are arranged in a mirror-symmetrical manner, or when the cross-sectional areas of two adjacent electromagnetic band gap units among the N electromagnetic band gap units are different, or when the N electromagnetic band gap units are rectangular cut-corner protrusion structures, the spacing between two groups of adjacent electromagnetic band gap units among the N electromagnetic band gap units is the same, and they can also be non-periodically arranged around the first waveguide to form an electromagnetic stop band, which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0224] Combination Figure 4It can be seen from the waveguide device shown that, in the case where the cross-sectional shapes of adjacent electromagnetic bandgap units 201 and electromagnetic bandgap units 202 are different among the N electromagnetic bandgap units, the spacings between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacings between adjacent electromagnetic bandgap units 204 and 205, and the spacings between adjacent electromagnetic bandgap units 207 and 206) are the same, which can meet the requirement of non-periodic arrangement around the first waveguide. Alternatively, in the case where the electromagnetic bandgap units 201, 202, 204, 205 and the electromagnetic bandgap units 203, 204, 207, 206 among the N electromagnetic bandgap units are mirror-symmetric about the dotted line 301, the spacings between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacings between adjacent electromagnetic bandgap units 204 and 205, and the spacings between adjacent electromagnetic bandgap units 207 and 206) are the same, which can meet the requirement of non-periodic arrangement around the first waveguide. Alternatively, when there are adjacent electromagnetic bandgap units 201 and electromagnetic bandgap units 202 with different cross-sectional areas among the N electromagnetic bandgap units, the spacing between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacing between adjacent electromagnetic bandgap units 204 and 205, the spacing between adjacent electromagnetic bandgap units 207 and 206) is the same, which can meet the requirement of non-periodic arrangement around the first waveguide. Alternatively, when the electromagnetic bandgap units 201, 203, 204, and 207 among the N electromagnetic bandgap units are all rectangular corner-cut convex structures, the spacing between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacing between adjacent electromagnetic bandgap units 204 and 205, the spacing between adjacent electromagnetic bandgap units 207 and 206) is the same, which can meet the requirement of non-periodic arrangement around the first waveguide, and so on, which are not exhaustively listed here.

[0225] Combination Fig. 6AIt can be seen from the waveguide device shown that, in the case where the cross-sectional shapes of adjacent electromagnetic bandgap units 601 and electromagnetic bandgap units 602 are different among the N electromagnetic bandgap units, the spacings between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacings between adjacent electromagnetic bandgap units 604 and 605, and the spacings between adjacent electromagnetic bandgap units 607 and 606) are the same, which can meet the requirement of non-periodic arrangement around the first waveguide. Alternatively, in the case where the electromagnetic bandgap units 601, 602, 604, 605 and the electromagnetic bandgap units 603, 604, 607, 606 among the N electromagnetic bandgap units are mirror-symmetric about the dotted line 301, the spacings between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacings between adjacent electromagnetic bandgap units 604 and 605, and the spacings between adjacent electromagnetic bandgap units 607 and 606) are the same, which can meet the requirement of non-periodic arrangement around the first waveguide. Alternatively, in the case where the cross-sectional areas of adjacent electromagnetic bandgap units 601 and electromagnetic bandgap units 602 are different among the N electromagnetic bandgap units, the spacings between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacings between adjacent electromagnetic bandgap units 604 and 605, and the spacings between adjacent electromagnetic bandgap units 607 and 606) are the same, which can satisfy the requirement of being non-periodically arranged around the first waveguide. Alternatively, in the case where the electromagnetic bandgap units 604 and 607 among the N electromagnetic bandgap units are both rectangular corner-cut convex structures, the spacings between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacings between adjacent electromagnetic bandgap units 604 and 605, and the spacings between adjacent electromagnetic bandgap units 607 and 606) are the same, which can satisfy the requirement of being non-periodically arranged around the first waveguide, and so on, which are not exhaustively listed here.

[0226] Combination Figure 6BIt can be seen from the waveguide device shown that, when there are adjacent electromagnetic band gap units 608 and electromagnetic band gap units 609 with different cross-sectional shapes among the N electromagnetic band gap units, the spacing between two groups of adjacent electromagnetic band gap units among the N electromagnetic band gap units (the spacing between adjacent electromagnetic band gap units 612 and electromagnetic band gap units 613, and the spacing between adjacent electromagnetic band gap units 615 and electromagnetic band gap units 614) are the same, which can meet the requirement of being non-periodically arranged around the first waveguide. Alternatively, when the electromagnetic band gap units 608, 609, 611, 612, 613 and the electromagnetic band gap units 610, 609, 616, 615, 614 among the N electromagnetic band gap units are mirror-symmetric about the dotted line 301, the spacings between two groups of adjacent electromagnetic band gap units among the N electromagnetic band gap units (the spacings between adjacent electromagnetic band gap units 612 and 613, and the spacings between adjacent electromagnetic band gap units 615 and 614) are the same, which can satisfy the non-periodic arrangement around the first waveguide. Alternatively, when there are adjacent electromagnetic bandgap units 608 and electromagnetic bandgap units 609 with different cross-sectional areas among the N electromagnetic bandgap units, the spacing between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacing between adjacent electromagnetic bandgap units 612 and electromagnetic bandgap units 613, the spacing between adjacent electromagnetic bandgap units 615 and electromagnetic bandgap units 614) is the same, which can meet the requirement of non-periodic arrangement around the first waveguide. Alternatively, when the electromagnetic bandgap units 608 and 610 among the N electromagnetic bandgap units are both rectangular corner-cut convex structures, the spacing between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacing between adjacent electromagnetic bandgap units 612 and electromagnetic bandgap units 613, the spacing between adjacent electromagnetic bandgap units 615 and electromagnetic bandgap units 614) is the same, which can meet the requirement of non-periodic arrangement around the first waveguide, and so on, which are not exhaustively listed here.

[0227] Combination Figure 6CIt can be seen from the waveguide device shown that, when there are adjacent electromagnetic band gap units 617 and electromagnetic band gap units 618 with different cross-sectional shapes among the N electromagnetic band gap units, the spacing between two groups of adjacent electromagnetic band gap units among the N electromagnetic band gap units (the spacing between adjacent electromagnetic band gap units 621 and electromagnetic band gap units 622, and the spacing between adjacent electromagnetic band gap units 625 and electromagnetic band gap units 624) are the same, which can meet the requirements of being non-periodically arranged around the first waveguide. Alternatively, when the electromagnetic band gap units 617, 618, 621, 622, 623 and the electromagnetic band gap units 620, 619, 625, 624, 623 among the N electromagnetic band gap units are mirror-symmetric about the dotted line 301, the spacings between two groups of adjacent electromagnetic band gap units among the N electromagnetic band gap units (the spacings between adjacent electromagnetic band gap units 621 and 622, and the spacings between adjacent electromagnetic band gap units 625 and 624) are the same, which can satisfy the non-periodic arrangement around the first waveguide. Alternatively, when there are adjacent electromagnetic bandgap units 617 and electromagnetic bandgap units 618 with different cross-sectional areas among the N electromagnetic bandgap units, the spacing between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacing between adjacent electromagnetic bandgap units 621 and electromagnetic bandgap units 622, and the spacing between adjacent electromagnetic bandgap units 625 and electromagnetic bandgap units 624) is the same, which can meet the requirement of non-periodic arrangement around the first waveguide. Alternatively, when the electromagnetic bandgap units 617 and 620 among the N electromagnetic bandgap units are both rectangular corner-cut convex structures, the spacing between two groups of adjacent electromagnetic bandgap units among the N electromagnetic bandgap units (the spacing between adjacent electromagnetic bandgap units 621 and electromagnetic bandgap units 622, and the spacing between adjacent electromagnetic bandgap units 625 and electromagnetic bandgap units 624) is the same, which can meet the requirement of non-periodic arrangement around the first waveguide, and so on, which are not exhaustively listed here.

[0228] It should be understood that the above-listed examples (Examples 1 to 7) are only possible situations in which N electromagnetic band gap units are non-periodically arranged around the first waveguide, and should not be used to limit the embodiments of the present application. Other possible situations in which N electromagnetic band gap units are non-periodically arranged around the first waveguide obtained based on reasonable deformation, combination or supplementation of the above-mentioned examples (Examples 1 to 7) all fall within the scope of protection of the embodiments of the present application.

[0229] In a possible embodiment, the N electromagnetic bandgap units have the same length along the first direction.

[0230] The first direction is the direction of signal transmission in the first waveguide.

[0231] Optional, combined with the above Figure 5BIt can be seen that the first direction is the transmission direction in which the signal of the RF chip 10 is output from the chip waveguide cavity 20 and sequentially passes through the PCB transition waveguide cavity 30 and the electromagnetic resistance band 50 to reach the antenna device side.

[0232] It can be understood that the N electromagnetic bandgap units have equal heights in the first direction and constitute an electromagnetic stop band to prevent the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device.

[0233] In a possible embodiment, at least two electromagnetic bandgap units among the N electromagnetic bandgap units have different lengths along the second direction.

[0234] The second direction is perpendicular to the direction of signal transmission in the first waveguide.

[0235] Optional, combined with the above Figure 4 and Figure 5B It can be seen that Figure 4 The structural schematic diagram of the waveguide device shown can be regarded as a top view of the waveguide device. Figure 5B The electromagnetic resistance band 50 in the above Figure 4 The front view of the N electromagnetic band gap units in the waveguide device shown in the figure, and the second direction is perpendicular to the direction of signal transmission in the first waveguide, that is, the second direction is perpendicular to the transmission direction of the signal of the RF chip 10 output from the chip waveguide cavity 20, passing through the PCB transition waveguide cavity 30 and the electromagnetic resistance band 50 to the antenna device side, so the second direction can be Figure 4 Any direction in the plane formed by the x-axis and y-axis.

[0236] Exemplarily, when the second direction is Figure 4 In the x-axis direction, among the N electromagnetic bandgap units, the electromagnetic bandgap unit 201 and the electromagnetic bandgap unit 202 have different lengths along the second direction, and the electromagnetic bandgap unit 201 and the electromagnetic bandgap unit 204 have different lengths along the second direction, and so on, which are not enumerated here one by one.

[0237] Exemplarily, when the second direction is Figure 4 In the y-axis direction, among the N electromagnetic bandgap units, the electromagnetic bandgap unit 204 and the electromagnetic bandgap unit 205 have different lengths along the second direction, and the electromagnetic bandgap unit 204 and the electromagnetic bandgap unit 201 have different lengths along the second direction, and so on, which are not enumerated here one by one.

[0238] It can be understood that among the N electromagnetic bandgap units, at least two electromagnetic bandgap units have unequal lengths, forming an electromagnetic stop band, so as to solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0239] In a possible embodiment, the edge spacing between any two adjacent electromagnetic band gap units among the N electromagnetic band gap units satisfies the following condition: 0.15λ≤a≤0.3λ.

[0240] Wherein, a is the edge distance between any two adjacent electromagnetic band gap units among the N electromagnetic band gap units, and λ is the vacuum wavelength of the electromagnetic wave transmitted in the first waveguide.

[0241] Optionally, the edge distance between any two adjacent electromagnetic band gap units may be understood as the closest edge distance between any two adjacent electromagnetic band gap units.

[0242] Optional, combined with the above Figure 4 It can be seen that the edge spacing a between the electromagnetic bandgap unit 201 and the electromagnetic bandgap unit 204 among the N electromagnetic bandgap units satisfies the above conditions, and the edge spacing a between the electromagnetic bandgap unit 204 and the electromagnetic bandgap unit 205 among the N electromagnetic bandgap units also satisfies the above conditions, and so on, which are not listed here one by one.

[0243] It can be understood that the edge spacing between any two adjacent electromagnetic band gap units among the N electromagnetic band gap units satisfies 0.15λ to 0.3λ, forming an electromagnetic stop band to prevent the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device.

[0244] In a possible embodiment, the first waveguide is a ridge waveguide.

[0245] Furthermore, the first waveguide is a ridge waveguide of the RF chip, and the RF signal is transmitted from the ridge waveguide port (i.e., the first waveguide port) of the RF chip to the antenna device after passing through N non-periodically arranged electromagnetic band gap units. This can achieve reliable transmission of the signal from the ridge waveguide port of the RF chip to the waveguide feed port of the antenna device, thereby improving the signal transmission performance and the robustness of the ridge waveguide port of the RF chip and the waveguide feed port of the antenna device.

[0246] In a possible embodiment, the N electromagnetic band gap units are arranged on the antenna device side or the first waveguide side.

[0247] For details, please refer to Figure 5C , Figure 5C A schematic diagram of the installation surface of a waveguide device provided in an embodiment of the present application.

[0248] like Figure 5C As shown, the electromagnetic resistance band 50 (ie, N electromagnetic band gap units) is located between the antenna device 60 and the first waveguide 20. It can be understood that Figure 5C The electromagnetic resistance band 50 (i.e., N electromagnetic band gap units) in the above Figure 4 and Figure 5A The front view corresponding to N electromagnetic bandgap units in the waveguide device shown.

[0249] Optional, Figure 5C The antenna device 60 in the embodiment may specifically include a waveguide feeder cavity and an antenna cavity, and the waveguide feeder cavity of the antenna device is connected to the electromagnetic resistance band 50 .

[0250] Optional, Figure 5C The first waveguide 20 in the figure can be understood as a waveguide on the RF chip side, which can specifically be a chip waveguide cavity of the RF chip, or a waveguide channel composed of the chip waveguide cavity of the RF chip and a transition waveguide cavity in the PCB board. The embodiment of the present application does not limit this.

[0251] Depend on Figure 5C It can be seen that the electromagnetic resistance band 50 can be arranged on the mounting surface 1, that is, on the RF chip side, or on the mounting surface 2, that is, on the antenna device side, and the embodiment of the present application does not limit this.

[0252] It can be understood that as long as the N electromagnetic band gap units in the waveguide device are located between the first waveguide and the antenna device and satisfy the non-periodic arrangement to form an electromagnetic stop band, the N electromagnetic band gap units in the waveguide device can be set on the antenna device side or on the first waveguide side (i.e., the RF chip side), both of which can block the signal transmitted in the first waveguide from leaking at the connection between the first waveguide and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0253] See also Figure 7 , Figure 7 It is a schematic diagram of the structure of a transceiver provided in an embodiment of the present application. It can be understood that the transceiver in the embodiment of the present application can be regarded as the above Figure 4 or Figure 5A or, it can be understood that the transceiver in the embodiment of the present application can also be regarded as an embodiment that can be executed independently, and the present application does not limit this. The transceiver provided in the embodiment of the present application can be applied to, including but not limited to, the above Figures 1 to 3 The millimeter wave radar or millimeter wave radar system shown. It can be understood that Figure 7 The structural schematic diagram of the transceiver device shown can be regarded as a top view of the transceiver device.

[0254] It should be understood that it is also possible to FIG. 6A to FIG. 6C A reasonable variation or supplement of the embodiment in the embodiment is obtained to obtain a transceiver device, the principle of which is the same as that based on the above Figure 4 or Figure 5A Reasonable modification or supplementation of the embodiments in the Figure 7 The principle of the transceiver in is similar, so this application only uses the above Figure 4 or Figure 5AReasonable modification or supplementation of the embodiments in the Figure 7 The transceiver in the example is used to illustrate the above FIG. 6A to FIG. 6C The transceiver device obtained by reasonable modification or supplementation of the embodiment in the embodiment will not be described in detail, but based on the above FIG. 6A to FIG. 6C The transceiver device obtained by reasonable modification or supplementation of the embodiments also falls within the protection scope of this application.

[0255] like Figure 7 As shown, the transceiver includes M as described above Figure 4 The waveguide device shown.

[0256] Wherein, M is an integer greater than 1.

[0257] For example, in Figure 7 In the transceiver shown in FIG. 1 , M=8. Accordingly, the transceiver includes 8 waveguide devices (701, 702, 703, 704, 705, 706, 707, 708), each of which includes a first waveguide and N electromagnetic bandgap units. The positional structural relationship between the N electromagnetic bandgap units and the first waveguide can be referred to in the above Figure 4 The relevant instructions will not be repeated here.

[0258] It should be understood that M=8 here is only used as an exemplary description and should not be used to limit the embodiments of the present application. M can also be other integers greater than 1, and the embodiments of the present application are not limited to this.

[0259] Optionally, the transceiver in the embodiment of the present application may be composed of the above Figure 4 The single channel (ie, a single waveguide device) shown is subjected to overall rotation, replication, translation and other operations to form a multi-channel (ie, multiple waveguide devices) switching structure.

[0260] For example, in Figure 7 In the transceiver shown in the figure, the waveguide devices 701, 702, 703, 704 are composed of the above Figure 4 The waveguide device shown is obtained by overall replication and translation. The waveguide devices 705, 706, 707, and 708 are obtained by overall replication and translation. Figure 4 The electromagnetic bandgap unit in the waveguide device shown is obtained by mirror symmetry about the x-axis and then overall replication and translation.

[0261] It should be understood that the method of obtaining the eight waveguide devices in the transceiver device through operations such as mirror symmetry, copy translation, etc. is only an exemplary description and should not be used to limit the embodiments of the present application. The transceiver devices obtained based on including but not limited to the above operations or reasonable modifications, supplements or combinations of the above operations all fall within the protection scope of the embodiments of the present application.

[0262] With the above Figure 4The waveguide device shown is applied to the above Figure 5B Similar to the application scenario shown, the transceiver in the embodiment of the present application can also be applied to the multi-channel structure of a millimeter-wave radar or a millimeter-wave radar system. Specifically, the transceiver is arranged between the waveguide outlet of the RF chip and the antenna device, and is non-periodically arranged around the waveguide outlet of the RF chip to form an electromagnetic resistance band to prevent the signal transmitted in the waveguide of the RF chip from leaking at the connection between the waveguide outlet of the RF chip and the antenna device, thereby realizing reliable transmission of the signal from the waveguide outlet of the RF chip to the waveguide feed of the antenna device, solving the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps, and improving the signal transmission performance and the robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device.

[0263] Regarding how the M waveguide devices in the above transceiver device are non-periodically arranged around the waveguide outlet of the radio frequency chip, several possible examples are given below:

[0264] Example 1:

[0265] The M waveguide devices are arranged in a mirror-symmetrical manner.

[0266] Optionally, the M waveguide devices are arranged in a mirror-symmetrical manner on a plane perpendicular to the signal transmission direction in the waveguide cavity of the radio frequency chip.

[0267] Combination Figure 7 It can be seen from the transceiver shown that the waveguide devices 701 , 703 , 705 , 707 and the waveguide devices 702 , 704 , 706 , 708 are mirror-symmetric about the dotted line 709 .

[0268] It can be understood that in this example one, the M waveguide devices are arranged in a mirror-symmetrical manner, and the M waveguide devices are non-periodically arranged around the waveguide outlet of the RF chip to form an electromagnetic resistance band, which can block the signal transmitted in the waveguide cavity of the RF chip from leaking at the connection between the RF chip waveguide outlet and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0269] Example 2:

[0270] The center points of the M waveguide devices are not on a straight line.

[0271] Combination Figure 7 It can be seen from the transceiver shown that the center points of the waveguide devices 701, 703, 705, and 707 are not in a straight line, and the center points of the waveguide devices 702, 704, 706, and 708 are not in a straight line.

[0272] It can be understood that in this example two, the center points of the M waveguide devices are not in a straight line, and the M waveguide devices are non-periodically arranged around the waveguide outlet of the RF chip to form an electromagnetic resistance band, which can block the signal transmitted in the waveguide cavity of the RF chip from leaking at the connection between the RF chip waveguide outlet and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0273] Example 3:

[0274] Among the M waveguide devices, two waveguide devices have different structures.

[0275] Optionally, the two waveguide devices with different structures can be composed of the above Figure 4 The single waveguide device shown is a waveguide device obtained after overall mirror symmetry, rotation, replication, translation and other operations.

[0276] Combination Figure 7 As can be seen from the transceiver shown in the figure, the waveguide device 701 and the waveguide device 705 have different structures. The waveguide device 701 is composed of the above Figure 4 The waveguide device shown in FIG. 1 is obtained by overall replication and translation. The waveguide device 705 is a Figure 4 The electromagnetic bandgap unit in the waveguide device shown is obtained by mirror symmetry about the x-axis and then overall replication and translation. The structures of the waveguide device 704 and the waveguide device 707 are also different, and so on, which are not listed here one by one.

[0277] Optionally, there may be three or more waveguide devices with different structures among the above-mentioned M waveguide devices, which is not limited in the embodiment of the present application.

[0278] It can be understood that in this example three, there are two waveguide devices with different structures among the M waveguide devices. The M waveguide devices are non-periodically arranged around the waveguide outlet of the RF chip to form an electromagnetic resistance band, which can block the signal transmitted in the waveguide cavity of the RF chip from leaking at the connection between the waveguide outlet of the RF chip and the antenna device, and can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0279] It should be understood that the above-listed examples (Examples 1 to 3) are merely possible situations in which M waveguide devices are non-periodically arranged around the waveguide outlet of the RF chip, and should not be used to limit the embodiments of the present application. Other possible situations in which M waveguide devices are non-periodically arranged around the waveguide outlet of the RF chip based on reasonable modifications, combinations or supplements of the above-listed examples (Examples 1 to 3) all fall within the scope of protection of the embodiments of the present application.

[0280] In a possible embodiment, the transceiver device further includes a frame.

[0281] The surrounding frame is arranged at the periphery of the M waveguide devices.

[0282] Optionally, the enclosure may be a metal enclosure.

[0283] For details, please refer to Fig. 8A , Fig. 8A It is a schematic diagram of the structure of a transceiver provided in an embodiment of the present application. It can be understood that the transceiver in the embodiment of the present application can be regarded as the above Figure 4 or Figure 5A or Figure 7 or, it can be understood that the transceiver in the embodiment of the present application can also be regarded as an embodiment that can be executed independently, and the present application does not limit this. The transceiver provided in the embodiment of the present application can be applied to, including but not limited to, the above Figures 1 to 3 The millimeter wave radar or millimeter wave radar system shown. It can be understood that Fig. 8A The structural schematic diagram of the transceiver device shown can be regarded as a top view of the transceiver device.

[0284] like Fig. 8A As shown, the transceiver device further includes a surrounding frame 801 .

[0285] The transceiver device may refer to the above Figure 7 The relevant description of the transceiver shown is not repeated here.

[0286] The enclosure 801 is disposed on the periphery of eight waveguide devices (waveguide devices 701, 702, 703, 704, 705, 706, 707, and 708) in the transceiver.

[0287] Optionally, the enclosure may be a metal enclosure.

[0288] Through the embodiments of the present application, a frame is set along the periphery of M waveguide devices to form a cavity. The cavity can destroy the transmission conditions of the surface waves when there is a certain gap between the installation surfaces corresponding to the transceiver devices, thereby improving the isolation between different channels (i.e., different waveguide devices) to solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0289] Optionally, the geometric center of the above-mentioned frame is the same as the geometric center of the M waveguide devices.

[0290] Combination Fig. 8A It can be seen that the geometric center of the frame 801 is the same as the geometric center of the eight waveguide devices (701, 702, 703, 704, 705, 706, 707, 708).

[0291] The surrounding frame 801 can form a cavity, which can destroy the surface wave transmission conditions when there is a certain gap between the installation surfaces corresponding to the transceiver devices, thereby improving the isolation between different channels (i.e., different waveguide devices) to solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0292] Optionally, the length of the surrounding frame along the first direction is the same as the length of the waveguide device along the first direction.

[0293] The first direction is the direction of signal transmission in the waveguide device.

[0294] Optional, combined with the above Figure 5B It can be seen that the first direction is the transmission direction in which the signal of the RF chip 10 is output from the chip waveguide cavity 20 and sequentially passes through the PCB transition waveguide cavity 30 and the electromagnetic resistance band 50 to reach the antenna device side.

[0295] It can be understood that the length of the frame along the direction of signal transmission in the waveguide device is the same as the length of the waveguide device along the direction of signal transmission in the waveguide device. It can be understood that the frame is at the same height as the electromagnetic band gap units in the M waveguide devices to form a cavity. When there is a certain gap between the mounting surfaces corresponding to the transceiver devices, the surface wave transmission conditions are destroyed, and the isolation between different channels (i.e., different waveguide devices) is improved to solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps.

[0296] Optionally, the above-mentioned surrounding frame is a continuous surrounding frame; or, the above-mentioned surrounding frame is a surrounding frame with one or more gaps.

[0297] When the frame is a continuous frame, please refer to the above Fig. 8A The relevant description of the frame 801 in will not be repeated here.

[0298] When the enclosure has one or more gaps, please refer to Figure 8B and Figure 8C , Figure 8B and Figure 8C A schematic diagram of the structures of two transceiver devices provided in an embodiment of the present application.

[0299] like Figure 8B As shown, there are four gaps in the frame 802, which are respectively located in the upper, lower, left and right directions of the frame 802.

[0300] like Figure 8C As shown, there are four gaps in the frame 803, which are respectively located at the upper left corner, the upper right corner, the lower left corner, and the lower right corner of the frame 803.

[0301] It is understandable that the frame in the above-mentioned transceiver device may be a continuous frame (such as Fig. 8A The frame 801 in the figure may also be a frame with one or more gaps (such as Figure 8B Frame 802 or Figure 8C The frame 803 in the figure is not limited in this embodiment of the present application.

[0302] It can be understood that when the frame in the above-mentioned transceiver device is a frame with one or more gaps, the cavity formed by it must meet the transmission conditions of the waves that destroy the surface when there is a certain gap on the installation surface corresponding to the transceiver device, so as to improve the isolation between different channels (i.e., different waveguide devices). As for the length, number, etc. of the gaps in the frame, the embodiments of the present application do not limit this.

[0303] Optionally, the distance between the inner wall of the frame and the waveguide device at the edge satisfies the following condition: 0.25λ≤b≤0.5λ.

[0304] Wherein, b is the distance between the inner wall of the frame and the waveguide device at the edge, and λ is the vacuum wavelength of the electromagnetic wave transmitted in the waveguide device.

[0305] Optionally, the distance between the inner wall of the frame and the waveguide device at the edge may be understood as the closest margin distance between the inner wall of the frame and the waveguide device at the edge.

[0306] Optional, combined with the above Fig. 8A It can be seen that the spacing b between the inner wall of the frame 801 and the waveguide device 707 at the edge satisfies the above conditions, the spacing b between the inner wall of the frame 801 and the waveguide device 708 at the edge also satisfies the above conditions, and so on, which are not listed here one by one.

[0307] It can be understood that the spacing between the inner wall of the frame and the waveguide device at the edge is between 0.25λ and 0.5λ to form a cavity, which destroys the transmission conditions of the surface waves when there is a certain gap on the installation surface corresponding to the transceiver device, thereby improving the isolation between different channels (i.e., different waveguide devices).

[0308] See also Fig. 9 , Fig. 9 It is a schematic diagram of the structure of a transceiver provided in an embodiment of the present application. It can be understood that the transceiver in the embodiment of the present application can be regarded as the above Figure 4 or Figure 5A or Figure 7 or FIG. 8A to FIG. 8C or, it can be understood that the transceiver in the embodiment of the present application can also be regarded as an embodiment that can be executed independently, and the present application does not limit this. The transceiver provided in the embodiment of the present application can be applied to, including but not limited to, the above Figures 1 to 3The millimeter wave radar or millimeter wave radar system shown. It can be understood that Fig. 9 The structural schematic diagram of the transceiver device shown can be regarded as a top view of the transceiver device.

[0309] like Fig. 9 As shown, the transceiver includes M as described above Figure 4 The waveguide device shown.

[0310] Wherein, M is an integer greater than 1.

[0311] For example, in Fig. 9 In the transceiver shown in FIG. 1 , M=8. Accordingly, the transceiver includes eight waveguide devices (701, 702, 703, 704, 705, 706, 707, 708). The positional structure relationship of the eight waveguide devices can be referred to in the above Figure 7 The relevant description of the waveguide device is not repeated here. In addition, each of the waveguide devices includes a first waveguide and N electromagnetic bandgap units. The positional structural relationship between the N electromagnetic bandgap units and the first waveguide can be referred to in the above Figure 4 The relevant instructions will not be repeated here.

[0312] The transceiver device further includes a surrounding frame 801 .

[0313] Correspondingly, the positional structure relationship of the frame 801 can be found in the above Fig. 8A The relevant instructions will not be repeated here.

[0314] Optionally, the frame 801 in the transceiver device may also be replaced by the above Figure 8B The frame 802 or the above Figure 8C The frame 803 or other structural forms of the frame are not limited in this embodiment of the present application.

[0315] Furthermore, in the transceiver, grooves (901, 902, 903, 904, 905) are also arranged along the third direction.

[0316] The groove is located between two adjacent waveguide devices, and the third direction is parallel to the longer side of the cross section of the waveguide device in the first direction, and the first direction is the direction of signal transmission in the waveguide device.

[0317] Optional, combined with the above Figure 5B It can be seen that the first direction is the transmission direction in which the signal of the RF chip 10 is output from the chip waveguide cavity 20 and sequentially passes through the PCB transition waveguide cavity 30 and the electromagnetic resistance band 50 to reach the antenna device side.

[0318] It can be understood that in the transceiver device in the embodiment of the present application, a groove is arranged parallel to the longer side (ie, the third direction) of the cross section of the waveguide device in the signal transmission direction of the waveguide device, and the groove is located between two adjacent waveguide devices.

[0319] Depend on Fig. 9 It can be seen that the groove 902 arranged along the third direction is located between adjacent waveguide devices 701 and 703, and between adjacent waveguide devices 702 and 704; the groove 903 arranged along the third direction is located between adjacent waveguide devices 703 and 705, and between adjacent waveguide devices 704 and 706; the groove 904 arranged along the third direction is located between adjacent waveguide devices 705 and 707, and between adjacent waveguide devices 706 and 708.

[0320] It can be understood that since the waveguide device is located between the waveguide outlet of the RF chip and the antenna device, it is used to block the signal transmitted in the waveguide of the RF chip from leaking at the connection between the waveguide outlet of the RF chip and the antenna device, and the above-mentioned groove is located between two adjacent waveguide devices. Therefore, the groove can be understood as a shallow groove structure (optionally, it can also be called a choke groove) that is sunken inward in the direction of the longer side of the waveguide feed of the antenna device, which can effectively block the surface current of the waveguide feed plane and improve the isolation between different channels (i.e., different waveguide devices).

[0321] It should be understood that Fig. 9 The five grooves provided in the figure are for illustrative purposes only and should not be used to limit the embodiments of the present application. More or fewer grooves may be provided according to the actual number of waveguide devices in the transceiver device, which falls within the protection scope of the embodiments of the present application.

[0322] Optionally, the distance between the groove and the center point of the waveguide device satisfies the following condition: 0.2λ≤c≤0.3λ.

[0323] Wherein, c is the distance between the groove and the center point of the waveguide device, and λ is the vacuum wavelength of the electromagnetic wave transmitted in the waveguide device.

[0324] It can be understood that the distance between the groove and the center point of the waveguide device satisfies 0.2λ to 0.3λ, which can effectively block the surface current of the waveguide feed plane and improve the isolation between different channels (ie different waveguide devices).

[0325] Optionally, the depth of the groove satisfies the following condition: 0.1λ≤d≤0.2λ.

[0326] Where d is the depth of the groove and λ is the vacuum wavelength of the electromagnetic wave transmitted in the waveguide device.

[0327] It can be understood that the depth of the groove satisfies the range of 0.1λ to 0.2λ, which can effectively block the surface current of the waveguide feed plane and improve the isolation between different channels (ie, different waveguide devices).

[0328] See also Fig. 10A , Fig. 10A A three-dimensional stereogram of a transceiver device provided in an embodiment of the present application. It can be understood that the transceiver device in the embodiment of the present application can be regarded as the above Figure 4 or Figure 5A or Figure 7 or FIG. 8A to FIG. 8C or Fig. 9 or, it can be understood that the transceiver in the embodiment of the present application can also be regarded as an embodiment that can be executed independently, and the present application does not limit this. The transceiver provided in the embodiment of the present application can be applied to, including but not limited to, the above Figures 1 to 3 The millimeter wave radar or millimeter wave radar system shown.

[0329] like Fig. 10A As shown, Fig. 10A (1) is a hierarchical schematic diagram of the structure of the transceiver, which is mainly divided into three layers: upper, middle and lower. The lower layer includes 8 ridge waveguides. The middle layer includes 8 electromagnetic band gap EBG stopbands (each EBG stopband includes N EBG units, which can be found in the above Figure 4 or Fig. 6A or Figure 6B or Figure 6C The N EBG units in the waveguide device shown in FIG. 1 and a metal frame; wherein the positional structural relationship of the 8 electromagnetic band gaps can refer to the above Figure 7 The relevant description of the transceiver shown in the figure will not be repeated here. The position and structure relationship of the metal frame can be referred to in the above FIG. 8A to FIG. 8C The relevant description of the transceiver shown in the figure will not be repeated here. The upper layer includes 5 choke slots, 8 rectangular waveguides and a metal body; wherein the position and structure relationship of the 5 choke slots can be referred to the above Fig. 9 The relevant description of the transceiver shown is not repeated here.

[0330] exist Fig. 10A In the transceiver shown in (1), the RF signal is transmitted from the ridge waveguide port of the RF chip through the non-periodic electromagnetic band gap and the metal frame layer to the rectangular cross-section waveguide, which can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps, and realize reliable transmission of signals from the RF chip waveguide port to the antenna device waveguide feed port, thereby improving the signal transmission performance and the robustness of the RF chip waveguide port and the antenna device waveguide feed port.

[0331] It is understandable that Fig. 10AAfter installing the various hierarchical structures shown in (1) in the figure, we can get Fig. 10A The schematic diagram of the combined structure of the transceiver device shown in (2) in the figure can solve the problem of significant deterioration or even failure of signal transmission performance caused by installation deviation and gap.

[0332] See also Fig. 10B , Fig. 10B This is a plan view of a transceiver provided in an embodiment of the present application. It can be understood that: Fig. 10B (a) is the above Fig. 10A A top view of the transceiver device shown, Fig. 10B (b) is the above Fig. 10A The front view of the transceiver device shown, Fig. 10B (c) is the above Fig. 10A A side view of the transceiver device shown.

[0333] The following will be combined FIG. 11A to FIG. 11C as well as FIG. 12A to FIG. 12C , further illustrating that the waveguide device and transceiver device provided by the present application can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps, realize reliable transmission of signals from the waveguide outlet of the RF chip to the waveguide feed of the antenna device, and improve the signal transmission performance and the robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device.

[0334] See also Fig.11A , Fig.11A A schematic diagram of the effect of return loss provided in an embodiment of the present application.

[0335] Depend on Fig.11A It can be seen that in the scenario of simulating 0mm gap installation in the Z direction, the return loss corresponding to the signal transmission from the waveguide outlet of the RF chip to the waveguide feed of the antenna device is ≤-20dB@76~81GHz.

[0336] See also Fig. 11B , Fig. 11B A schematic diagram of the effect of insertion loss provided in an embodiment of the present application.

[0337] Depend on Fig. 11B It can be seen that in the scenario of simulating 0mm gap installation in the Z direction, the insertion loss corresponding to the signal transmission from the waveguide outlet of the RF chip to the waveguide feed port of the antenna device is ≤0.15dB@76~81GHz.

[0338] See also Fig. 11C , Fig. 11C A schematic diagram of the isolation effect provided in an embodiment of the present application.

[0339] Depend on Fig. 11CIt can be seen that in the scenario of simulating 0mm gap installation in the Z direction, the worst isolation corresponding to the signal transmission from the waveguide outlet of the RF chip to the waveguide feed of the antenna device is ≥75dB@76~81GHz.

[0340] See also Fig. 12A , Fig. 12A A schematic diagram of the isolation effect provided in an embodiment of the present application.

[0341] like Fig. 12A As shown, the worst isolation curve corresponding to the 8-channel signal transmission from the waveguide outlet of the RF chip to the waveguide feed of the antenna device in the scenario of using a single EBG structural design and a 0.3mm gap installation in the Z direction is shown.

[0342] See also Fig. 12B , Fig. 12B A schematic diagram of the isolation effect provided in an embodiment of the present application.

[0343] like Fig. 12B As shown, the worst isolation curve corresponding to the 8-channel signal transmission from the waveguide outlet of the RF chip to the waveguide feed of the antenna device in the scenario of using the EBG and choke slot structural design and installing with a 0.3mm gap in the Z direction is shown.

[0344] See also Fig. 12C , Fig. 12C A schematic diagram of the isolation effect provided in an embodiment of the present application.

[0345] like Fig. 12C As shown, the worst isolation curve corresponding to the 8-channel signal transmission from the waveguide outlet of the RF chip to the waveguide feed of the antenna device in the scenario of using the structural design of EBG, choke slot and metal frame and installing with a gap of 0.3mm in the Z direction is shown.

[0346] By the above FIG. 12A to FIG. 12C It can be seen that after the introduction of the choke slot and the metal frame, the worst isolation corresponding to the channel signal transmission from the waveguide outlet of the RF chip to the waveguide feed of the antenna device is improved from 19dB to 36dB.

[0347] By the above FIG. 11A to FIG. 11C As well as the above FIG. 12A to FIG. 12C The effect diagram can also get the data in the following table:

[0348]

[0349] The table shows the signal transfer performance from the RF chip waveguide outlet to the antenna device waveguide feed under different horizontal and vertical dimension extreme deviations. It can be seen that under the scenario of the maximum installation deviation of X:0.2+Y:0.2+Z:0.3mm, the channel performance from the RF chip waveguide outlet to the antenna device waveguide feed can still meet the use requirements.

[0350] In addition, in a possible embodiment, a method for preparing the waveguide device and / or the transceiver device in the present application is also provided, and the specific process of the preparation method is as follows:

[0351] Method 1: N electromagnetic band gap units, metal frames, and choke slots can be obtained by plastic layered mold opening, and then electroplating is performed on the surface of each mold, and finally a waveguide device and / or a transceiver device including N electromagnetic band gap units, metal frames, and choke slots can be obtained by layer brazing.

[0352] Among them, the process of plastic layered mold opening is as follows: the plastic is first heated and melted in the bottom of the injection molding machine, and then, pushed by the screw of the injection molding machine, enters the mold cavity through the injection molding machine nozzle and the pouring system of the mold. The plastic is cooled and hardened into shape, and the product is demolded to obtain the product.

[0353] Plastic electroplating is to cover the plastic surface with a metal layer to give it metallic properties. The specific process is: surface cleaning, solvent treatment, conditioning treatment, and sensitivity treatment.

[0354] Brazing: refers to a welding method in which the solder and the workpiece are heated to the melting temperature of the solder at the same time, and the gap between the solid workpieces is filled with liquid solder to connect the metals. When brazing, the oxide film and oil stains on the contact surface of the parent material must be removed first, so that the capillary can function after the solder melts, increasing the wettability and capillary fluidity of the solder.

[0355] Method 2: N electromagnetic band gap units, metal frames, and choke slots may also be machined in layers, and then the N electromagnetic band gap units, metal frames, and choke slots may be formed by welding to obtain a waveguide device and / or a transceiver device.

[0356] The waveguide device and / or transceiver device obtained by the above-mentioned preparation method can solve the problem of significant deterioration or even failure of signal transmission performance due to installation deviation and gaps, realize reliable transmission of signals from the waveguide outlet of the RF chip to the waveguide feed of the antenna device, and improve the signal transmission performance and the robustness of the waveguide outlet of the RF chip and the waveguide feed of the antenna device.

[0357] Exemplarily, by the above-mentioned method for preparing the waveguide device, the above-mentioned Figure 4 , Figure 5A , FIG. 6A to FIG. 6C The waveguide device shown and / or the above Figure 7 , FIG. 8A to FIG. 8C , Fig. 9 ,as well as Fig. 10A and Fig. 10B The transceiver device shown in any one of the above, the structural characteristics and functional characteristics of the waveguide device and the transceiver device can refer to the above Figure 4 , Figure 5A , FIG. 6A to FIG. 6C , Figure 7 , FIG. 8A to FIG. 8C , Fig. 9 ,as well as Fig. 10A and Fig. 10B The corresponding description in will not be repeated here.

[0358] The present application provides a chip, which includes the waveguide device or transceiver device provided in the present application.

[0359] The present application provides a radar or radar system, which includes a waveguide device or a transceiver device or the above chip provided in the present application. It should be noted that there may be a variety of smart sensors integrated with sensors. When the above smart sensor includes a millimeter wave detection function, the above smart sensor can also be called a millimeter wave radar or a millimeter wave radar system.

[0360] The present application provides a terminal device, which includes a waveguide device or a transceiver device provided in the present application. For example, the terminal device can be a transportation tool, such as a car, a truck, an aircraft, a drone, a slow transport vehicle, a spacecraft, or a ship, etc., and can also be any device that can carry a detection device, such as a surveying and mapping device. One or more waveguide devices or transceivers provided in the present application are deployed on the terminal device.

[0361] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A waveguide device, characterized in that: include: A first waveguide and N electromagnetic bandgap units, wherein N is an integer greater than 0; The N electromagnetic band gap units are located between the first waveguide and the antenna device. The N electromagnetic band gap units are non-periodically arranged around the first waveguide. Signals are transmitted between the first waveguide and the antenna device.

2. The waveguide device according to claim 1, characterized in that Among the N electromagnetic bandgap units, two adjacent electromagnetic bandgap units have different cross-sectional shapes.

3. The waveguide device according to claim 1 or 2, characterized in that: The N electromagnetic bandgap units are arranged in a mirror-symmetrical manner.

4. The waveguide device according to any one of claims 1 to 3, characterized in that Among the N electromagnetic band gap units, there are two groups of adjacent electromagnetic band gap units with different spacings.

5. The waveguide device according to any one of claims 1 to 4, characterized in that The N electromagnetic bandgap units are arranged in a rectangular shape around the first waveguide.

6. The waveguide device according to any one of claims 1 to 5, characterized in that Among the N electromagnetic band gap units, two adjacent electromagnetic band gap units have different cross-sectional areas.

7. The waveguide device according to any one of claims 1 to 6, characterized in that The N electromagnetic bandgap units are rectangular corner-cut convex structures.

8. The waveguide device according to any one of claims 1 to 3, characterized in that The intervals between two groups of adjacent electromagnetic band gap units in the N electromagnetic band gap units are the same.

9. The waveguide device according to any one of claims 1 to 8, characterized in that There are three structural forms of the N electromagnetic bandgap units, and N=7.

10. The waveguide device according to any one of claims 1 to 9, characterized in that The N electromagnetic bandgap units have the same length along a first direction, where the first direction is a direction in which signals are transmitted in the first waveguide.

11. The waveguide device according to any one of claims 1 to 10, characterized in that At least two of the N electromagnetic bandgap units have different lengths along a second direction, and the second direction is perpendicular to a direction in which signals are transmitted in the first waveguide.

12. The waveguide device according to any one of claims 1 to 11, characterized in that The edge spacing between any two adjacent electromagnetic band gap units among the N electromagnetic band gap units satisfies the following condition: 0.15λ≤a≤0.3λ; Wherein, a is the edge distance between any two adjacent electromagnetic band gap units among the N electromagnetic band gap units, and λ is the vacuum wavelength of the electromagnetic wave transmitted in the first waveguide.

13. The waveguide device according to any one of claims 1 to 12, characterized in that The first waveguide is a ridge waveguide.

14. The waveguide device according to any one of claims 1 to 13, characterized in that The N electromagnetic bandgap units are arranged on the antenna device side or the first waveguide side.

15. A transceiver, characterized in that: The method comprises M waveguide devices according to any one of claims 1 to 14, wherein M is an integer greater than 1.

16. The transceiver according to claim 15, characterized in that: The M waveguide devices are arranged non-periodically.

17. The transceiver according to claim 15 or 16, characterized in that: The M waveguide devices are arranged in a mirror-symmetrical manner.

18. The transceiver device according to any one of claims 15 to 17, characterized in that: The center points of the M waveguide devices are not on a straight line.

19. The transceiver device according to any one of claims 15 to 18, characterized in that: Among the M waveguide devices, two waveguide devices have different structures.

20. The transceiver device according to any one of claims 15 to 19, characterized in that: The transceiver device further includes a surrounding frame, which is arranged at the periphery of the M waveguide devices.

21. The transceiver according to claim 20, characterized in that: The geometric center of the frame is the same as the geometric center of the M waveguide devices.

22. The transceiver according to claim 20 or 21, characterized in that: The length of the surrounding frame along the first direction is the same as the length of the waveguide device along the first direction, and the first direction is the direction of signal transmission in the waveguide device.

23. The transceiver device according to any one of claims 20 to 22, characterized in that: The surrounding frame is a continuous surrounding frame; or, the surrounding frame is a surrounding frame with one or more gaps.

24. The transceiver device according to any one of claims 20 to 23, characterized in that: The spacing between the inner wall of the frame and the waveguide device at the edge satisfies the following condition: 0.25λ≤b≤0.5λ; Wherein, b is the distance between the inner wall of the frame and the waveguide device at the edge, and λ is the vacuum wavelength of the electromagnetic wave transmitted in the waveguide device.

25. The transceiver device according to any one of claims 15 to 24, characterized in that: Arranging a groove along a third direction, wherein the groove is located between two adjacent waveguide devices; The third direction is parallel to a longer side of a cross section of the waveguide device in a first direction, and the first direction is a direction of signal transmission in the waveguide device.

26. The transceiver device according to claim 25, characterized in that: The distance between the groove and the center point of the waveguide device satisfies the following condition: 0.2λ≤c≤0.3λ; Wherein, c is the distance between the groove and the center point of the waveguide device, and λ is the vacuum wavelength of the electromagnetic wave transmitted in the waveguide device.

27. The transceiver according to claim 25 or 26, characterized in that: The depth of the groove satisfies the following condition: 0.1λ≤d≤0.2λ; Wherein, d is the depth of the groove, and λ is the vacuum wavelength of the electromagnetic wave transmitted in the waveguide device.

28. A radar, characterized in that: The radar comprises the waveguide device according to any one of claims 1 to 14, or the transceiver according to any one of claims 15 to 27.

29. A terminal device, characterized in that: The terminal device comprises the waveguide device according to any one of claims 1 to 14, or the transceiver device according to any one of claims 15 to 27, or the radar according to claim 28.

30. A vehicle end, characterized in that: The vehicle end includes the waveguide device described in any one of claims 1 to 14, or the transceiver device described in any one of claims 15 to 27, or the radar described in claim 28, or the terminal equipment described in claim 29.

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