Antenna devices, radar, and electronic equipment for sensors

Abstract

This application discloses an antenna device, radar, and electronic equipment for sensors. The antenna device includes a transmitting antenna and a receiving antenna. The transmitting antenna includes a first feed line, at least one first transmitting stub, and at least one second transmitting stub. The first and second transmitting stubs are staggered on both sides of the first feed line along its extension direction. The length of the second transmitting stub is greater than the length of the first transmitting stub. For any transmitting and receiving channel, the receiving antenna has a mirror structure of the transmitting antenna. This improves the integration of the antenna device while meeting the requirements of the antenna device for key detection directions.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and more particularly to an antenna device, radar, and electronic equipment for sensors. Background Technology

[0002] With the increasing car ownership rate in China, people's understanding of automobiles is also deepening. As a safety system, vehicle-mounted radar systems have functions such as reversing monitoring, speed measurement, and collision avoidance. A radar system includes a radar, which in turn includes an antenna assembly. The antenna assembly consists of a transmitting antenna and a receiving antenna. The transmitting antenna emits electromagnetic wave signals into the space to be detected. These signals are reflected off the detected object, forming an echo, which is then received by the receiving antenna. The common antenna pattern of the transmitting and receiving antennas determines the radar system's transmission and reception pattern, further defining the radar's detection performance.

[0003] To achieve wide-angle detection, the antenna needs to have a wide beam pattern. To achieve this, a power divider module is often added, and specific amplitude and phase are assigned to each antenna stub.

[0004] However, the introduction of a power divider module into the aforementioned transmitting antenna increases the design difficulty and makes the structure more complex. Furthermore, the radiation from the power divider affects the sidelobes of the elevation pattern. In addition, the transmitting and receiving antennas with power dividers have a larger area, which is not conducive to the integration of the entire radar device. Summary of the Invention

[0005] This application provides an antenna device, radar, and electronic device for sensors, which improves the integration of the antenna device while meeting the antenna device's requirement for a wide angular range.

[0006] In a first aspect, embodiments of this application provide an antenna device for a sensor, including a transmitting antenna and a receiving antenna, wherein the transmitting antenna includes: a first feed line, at least one first transmitting stub, and at least one second transmitting stub; the first transmitting stub and the second transmitting stub are alternately distributed on both sides of the first feed line along the extension direction of the first feed line; the length of the second transmitting stub is greater than the length of the first transmitting stub;

[0007] The receiving antenna has a structure that is a mirror image of the transmitting antenna;

[0008] The transceiver system formed by the transmitting and receiving antennas is used to detect targets within the corresponding beam range based on the beam deflection characteristics of the formed antenna image.

[0009] In some embodiments shown in the first aspect, the length of the first transmitting stub is half the waveguide wavelength of the current medium, and the length of the second transmitting stub is the waveguide wavelength.

[0010] In some embodiments shown in the first aspect, the spacing between each of the first transmitting branches and the spacing between each of the second transmitting branches are both the waveguide wavelength of the current medium.

[0011] Secondly, this application provides an antenna device for a sensor, comprising a transmitting antenna and a receiving antenna, wherein the radiation patterns of both the transmitting and receiving antennas have beam deflection characteristics; the radiation pattern of the receiving antenna is a mirror image of the beam deflection characteristics of the radiation pattern of the transmitting antenna; the transceiver system formed by the transmitting and receiving antennas is used to detect targets within a corresponding beam range based on the beam deflection characteristics of the mirror image formed by the antennas.

[0012] In some examples of the second aspect, the transmitting antenna is the transmitting antenna in any of the antenna devices described in the first aspect.

[0013] In some examples of the second aspect, the receiving antenna includes: a second feed line; and at least one first receiving stub and at least one second receiving stub respectively connected to the second feed line; wherein the first receiving stub and the second receiving stub are staggered on both sides of the second feed line along the extension direction of the second feed line; and the length of the second receiving stub is greater than the length of the first receiving stub.

[0014] In some examples of the second aspect, the length of the first receiving stub is half the waveguide wavelength of the current medium, and the length of the second receiving stub is the waveguide wavelength.

[0015] In some examples of the second aspect, the spacing between each of the first receiving stubs and the spacing between each of the second receiving stubs are both the waveguide wavelength of the current medium.

[0016] Thirdly, embodiments of this application also provide a radar, including: an antenna device as described in any one of the first or second aspects; a signal transceiver connected to the antenna device, for transmitting a detection signal wave through a transmitting antenna in the antenna device, and receiving an echo signal through a receiving antenna in the antenna device, so as to output information after processing of the signal reflected from the probe; wherein the echo signal wave is formed by the reflection of the detection signal wave.

[0017] Fourthly, embodiments of this application also provide an electronic device, including: a radar as described in the third aspect; a processor connected to the radar; and a memory connected to the processor.

[0018] This application provides an antenna device for a sensor, including a transmitting antenna and a receiving antenna. The transmitting antenna includes a first feed line, at least one first transmitting stub, and at least one second transmitting stub. The first and second transmitting stubs are alternately distributed on both sides of the first feed line along its extension direction. The length of the second transmitting stub is greater than the length of the first transmitting stub. The transmitting antenna has a beam deflection characteristic. For any receiving antenna, its structure is a mirror image of the transmitting antenna. The receiving antenna also has a beam deflection characteristic, but its beam deflection direction is mirrored that of the transmitting antenna. The transceiver system formed by the transmitting and receiving antennas, based on the beam deflection characteristics of the mirrored images of the two antennas, can be used to detect targets within a specific beam range. In the above technical solution, the transmitting antenna and the receiving antenna can constitute an antenna device. Since the transmitting antenna and the receiving antenna are mirror images of each other, their transmission and reception patterns are also mirror images of each other. By superimposing the transmission and reception patterns of the receiving antenna and the transmitting antenna, the transmission and reception pattern of the antenna device can be obtained. The antenna device is obtained by integrating the transmitting antenna and the receiving antenna, which have a relatively small area. The antenna device can be used in radar, the radar can be used in electronic equipment, and the electronic equipment can be mounted on a vehicle. This enables the vehicle to perform key detection in the horizontal direction, improves the integration of vehicle components, and meets the vehicle's requirements for key detection directions.

[0019] These or other aspects of this application will become more readily apparent in the following description. Attached Figure Description

[0020] Figure 1 A schematic diagram of the transmitting antenna in an antenna device with a power sub-module;

[0021] Figure 2 A transceiver diagram including the horizontal direction ± (20°~60°);

[0022] Figure 3a This is a schematic diagram of the structure of a transmitting antenna in an antenna device provided in Embodiment 1 of this application;

[0023] Figure 3b This is a schematic diagram of the structure of a receiving antenna in an antenna device provided in Embodiment 1 of this application;

[0024] Figure 3c This is a schematic diagram of the structure of a transmitting and receiving antenna device provided in Embodiment 1 of this application;

[0025] Figure 4 This is a current distribution diagram of the transmitting antenna in an antenna device provided in Embodiment 2 of this application;

[0026] Figure 5This is a current distribution diagram of a receiving antenna in an antenna device provided in Embodiment 2 of this application;

[0027] Figure 6 This is the radiation pattern of the transmitting antenna in an antenna device provided in Embodiment 2 of this application;

[0028] Figure 7 This is the radiation pattern of the receiving antenna in an antenna device provided in Embodiment 2 of this application;

[0029] Figure 8 This is a radiation pattern of an antenna device provided in Embodiment 2 of this application;

[0030] Figure 9 This is a schematic diagram of the structure of a radar provided in Embodiment 4 of this application;

[0031] Figure 10 This is a schematic diagram of the structure of an electronic device provided in Embodiment 5 of this application. Detailed Implementation

[0032] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present application, not the entire structure.

[0033] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0034] The terms "first" and "second," etc., used in the specification and drawings of this application are used to distinguish different objects or to distinguish different treatments of the same object, rather than to describe a specific order of objects.

[0035] Furthermore, the terms "comprising" and "having," and any variations thereof, used in the description of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include other steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0036] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but may also have additional steps not included in the figures. The process can correspond to a method, function, procedure, subroutine, subroutine, etc. Moreover, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified.

[0037] It should be noted that in the embodiments of this application, the words "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0038] In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0039] Figure 1 This is a schematic diagram of the transmitting antenna in an antenna device with a power distribution module. Figure 2 To generate a transmit / receive chart that includes the horizontal ±(20°~60°) direction, and to achieve focused detection of the horizontal ±(20°~60°) direction, the following methods can be used: Figure 1 The beamforming antenna shown serves as the transmitting antenna. A power divider module assigns different amplitudes and phases to each antenna stub to determine the transmitting antenna's radiation pattern. The receiving antenna is designed as a wide-beam antenna, such as a serpentine or comb antenna. The power divider module introduced in this scheme increases the design complexity of the antenna device, and the transmitting and receiving antennas occupy a large area, which is detrimental to antenna device integration.

[0040] Therefore, this invention proposes an antenna device with a simple structure and small area to achieve, for example... Figure 2 The radiation pattern shown.

[0041] The antenna device will now be described in detail with reference to various embodiments.

[0042] Example 1

[0043] This application provides an antenna device for a sensor, including a transmitting antenna and a receiving antenna. The transmitting antenna includes a first feed line, at least one first transmitting stub, and at least one second transmitting stub. The first and second transmitting stubs are staggered on both sides of the first feed line along its extension direction. The length of the second transmitting stub is greater than the length of the first transmitting stub. The receiving antenna is a mirror image of the transmitting antenna. The transceiver system formed by the transmitting and receiving antennas is used to detect targets within a corresponding beam range based on the beam deflection characteristics of the formed antenna mirror image.

[0044] Specifically, the first feed line serves to transmit electromagnetic waves and form an antenna array; both the first and second transmit stubs are radiating stubs. The first and second transmit stubs have different lengths. For example, the first and second transmit stubs are distributed on opposite sides of the first feed line and are staggered, achieving beam deflection of the horizontal radiation pattern of the transmitting antenna. The receiving antenna can be a mirror image of the transmitting antenna; its horizontal radiation pattern is also beam-deflected, but in a mirror direction compared to the transmitting antenna. Utilizing these mirrored beam deflection directions, the resulting transceiver system can achieve detection requirements at specific angles.

[0045] Figure 3a This is a schematic diagram of the structure of the transmitting antenna in an antenna device provided in Embodiment 1 of this application, as shown below. Figure 3a As shown, the transmitting antenna may include a first feed line, and eight first transmitting stubs and eight second transmitting stubs that are staggered on both sides of the first feed line, wherein the length of the second transmitting stubs is greater than the length of the first transmitting stubs; Figure 3b This is a schematic diagram of the structure of a receiving antenna in an antenna device provided in Embodiment 1 of this application, as shown below. Figure 3b As shown, the receiving antenna may also include a feed line and two receiving stubs of different lengths that are staggered on both sides of the feed line; Figure 3c This is a schematic diagram of the structure of an antenna device provided in Embodiment 1 of this application, as shown below. Figure 3c As shown, the antenna device includes a mirror-shaped transmitting antenna and a receiving antenna, specifically including, for example... Figure 3a The transmitting antenna shown and as Figure 3b The receiving antenna shown, and as Figure 3a The transmitting antenna shown and as Figure 3b The receiving antennas shown are arranged in a mirror image. The 6dB beamwidth measures the effective angular range that the transmitting / receiving antennas can detect in free space. The transmit / receive pattern of the antenna system reflects the radar's detection capability in the corresponding application area.

[0046] Because the first and second transmit stubs of the transmitting antenna have different lengths, the radiation pattern of the transmitting antenna will have beam deflection characteristics, and the beam deflection angle of the transmitting antenna will be related to the lengths of the first and second transmit stubs.

[0047] Similar to the transmitting antenna provided in this application, since the receiving antenna has an antenna structure that is a mirror image of the transmitting antenna, the radiation pattern of the receiving antenna is also a mirror image of the radiation pattern of the transmitting antenna. Therefore, when the sensor uses the transmitting and receiving antennas to detect obstacles in the surrounding environment, the transmitting and receiving antennas complement each other in the beam deflection direction of their respective radiation patterns, thereby broadening the overall angular range at which the antenna device can sensitively detect obstacles.

[0048] An antenna device for a sensor provided in Embodiment 1 of this application includes a transmitting antenna and a receiving antenna. The transmitting antenna includes a first feed line, at least one first transmitting stub, and at least one second transmitting stub. The first transmitting stub and the second transmitting stub are alternately distributed on both sides of the first feed line along its extension direction. The length of the second transmitting stub is greater than the length of the first transmitting stub. The receiving antenna has a structure that is a mirror image of the transmitting antenna. The transceiver system formed by the transmitting and receiving antennas is used to detect targets within a corresponding beam range based on the beam deflection characteristics of the formed antenna mirror image.

[0049] The above technical solution allows the transmitting and receiving antennas to form an antenna device. Since the transmitting and receiving antennas are mirror images of each other, their transmission and reception patterns are also mirror images. Superimposing the transmission and reception patterns of the receiving and transmitting antennas yields the transmission and reception pattern of the antenna device. By integrating a relatively small transmitting and receiving antenna into the antenna device, focused detection in the horizontal direction is achieved, improving the integration of the antenna device while meeting its requirements for focused detection directions. For example, compared to... Figure 1 The millimeter-wave vehicle-mounted radar antenna shown is symmetrically designed, such as... Figure 3a and 3b The asymmetric design of the millimeter-wave vehicle radar antenna shown can meet the high gain requirements of the vehicle's auxiliary braking driving system in the key detection directions of ± (20°~60°).

[0050] Example 2

[0051] Embodiment 2 of this application provides an antenna device for a sensor, including a transmitting antenna and a receiving antenna. The transmitting antenna includes: a first feed line, at least one first transmitting stub, and at least one second transmitting stub. The first transmitting stub and the second transmitting stub are alternately distributed on both sides of the first feed line along its extension direction. The length of the second transmitting stub is greater than the length of the first transmitting stub. The receiving antenna has a structure that is a mirror image of the transmitting antenna. The transceiver system formed by the transmitting and receiving antennas is used to detect targets within a corresponding beam range based on the beam deflection characteristics of the formed antenna mirror image.

[0052] In one embodiment, the receiving antenna includes: a second feed line, at least one first receiving stub, and at least one second receiving stub; the first receiving stub and the second receiving stub are staggered on both sides of the second feed line along the extension direction of the second feed line; the length of the second receiving stub is greater than the length of the first receiving stub.

[0053] Specifically, the second feed line can be a transmission stub used to transmit electromagnetic waves and antenna arrays; the first and second receiving stubs are radiation stubs. The first and second receiving stubs have different lengths and are distributed on both sides of the second feed line, respectively, and are staggered to achieve beam deflection of the horizontal radiation pattern of the transmitting antenna.

[0054] The first transmitting stub has a first transmitting current and a second transmitting current distributed on it, with the amplitudes of the first and second transmitting currents being the same and their phases differing by 180°. The second transmitting stub has a third transmitting current distributed on it, with the amplitude of the third transmitting current being the same as that of the first and second transmitting currents, and the phase of the third transmitting current being determined by the phase of the first transmitting current and the spacing between adjacent first and second transmitting stubs. Correspondingly, the first receiving stub has a first receiving current and a second receiving current distributed on it, with the amplitudes of the first and second receiving currents being the same and their phases differing by 180°. The second receiving stub has a third receiving current distributed on it, with the amplitude of the third receiving current being the same as that of the first and second receiving currents, and the phase of the third receiving current being determined by the phase of the first receiving current and the spacing between adjacent first and second receiving stubs.

[0055] The currents on each of the first transmitting branches are in phase, allowing the radiated energy of the first transmitting branches located on the same side of the first feed line to be superimposed in phase. Similarly, the currents on each of the second transmitting branches are in phase, allowing the radiated energy of the second transmitting branches located on the other side of the first feed line to be superimposed, further enhancing the radiated energy of the transmitting antenna. Likewise, the currents on each of the first receiving branches are in phase, allowing the receiving performance of the first receiving branches located on the same side of the second feed line to be superimposed. Similarly, the currents on each of the second receiving branches are in phase, allowing the receiving performance of the second receiving branches located on the other side of the second feed line to be superimposed, further improving the receiving performance of the receiving antenna.

[0056] The first and second feed lines are respectively connected to the sensor's signal transmitter and signal receiver to transmit electromagnetic waves. For example, the first feed line transmits the electromagnetic waves output by the signal generator to the first and second transmitting stubs through the sensor's feed section, causing the first and second transmitting stubs to radiate electromagnetic waves. Alternatively, the first and second receiving stubs convert electromagnetic waves from free space into receivable electrical signals and transmit them to the signal receiver through the second feed line and its connected feed section. To achieve miniaturized antennas, any feed section can be connected to the antenna device using various structures built with integrated circuits. For example, the feed section may employ a coaxial transmission structure or a microstrip transmission structure.

[0057] Figure 4 This is a current distribution diagram of the transmitting antenna in an antenna device provided in Embodiment 2 of this application, as shown below. Figure 4 As shown, a first transmitting current and a second transmitting current are distributed on the first transmitting stub. If the amplitude of the first transmitting current distributed on the first transmitting stub is 1 and the phase is α, then the amplitude of the second transmitting current is 1 and the phase is α+180°; and the amplitude of the third transmitting current distributed on the second transmitting stub is 1 and the phase is β.

[0058] Figure 5 This is a current distribution diagram of the receiving antenna in an antenna device provided in Embodiment 2 of this application, as shown below. Figure 5 As shown, a first receiving current and a second receiving current are distributed on the first receiving stub. If the amplitude of the first receiving current distributed on the first receiving stub is 1 and the phase is α, then the amplitude of the second receiving current is also 1 and the phase is α+180°; and the amplitude of the third receiving current distributed on the second receiving stub is also 1 and the phase is β.

[0059] In this embodiment, the spacing between adjacent first and second transmitting stubs determines the phase of the third transmitting current, and thus the radiation pattern of the transmitting antenna; the spacing between adjacent first and second receiving stubs determines the phase of the third receiving current, and thus the radiation pattern of the receiving antenna; after determining the radiation patterns of the transmitting and receiving antennas, the radiation pattern of the antenna device can be determined. In one embodiment, based on the radiation direction determined by the mirror structure between the transmitting and receiving antennas, the transmitting and receiving antennas are arranged on an RF board to form a radiation pattern within a directional range symmetrical about a preset directional axis. Examples of the transmitting and receiving antennas are metal materials such as copper and gold. The RF board is also called a high-frequency board.

[0060] Among them, the radio frequency board can be a common millimeter-wave high-frequency board. One side of the high-frequency board can be symmetrically arranged with transmitting and receiving antennas, and the other side is covered with a metal layer used for grounding. The middle is a dielectric material to form a complete radiation structure.

[0061] Figure 6 This is the radiation pattern of the transmitting antenna in an antenna device provided in Embodiment 2 of this application. Figure 7 This is the radiation pattern of the receiving antenna in an antenna device provided in Embodiment 2 of this application. Figure 8 This application provides a radiation pattern for an antenna device according to Embodiment 2. In this embodiment, after determining the radiation patterns of the transmitting antenna and the receiving antenna, the radiation pattern of the antenna device can be determined as follows: Figure 8 As shown, the detection direction of this antenna device can be ±(20°~60°).

[0062] In one embodiment, the length of the first transmitting stub is half the waveguide wavelength of the current medium, and the length of the second transmitting stub is the waveguide wavelength.

[0063] In one embodiment, the length of the first receiving stub is half the waveguide wavelength of the current medium, and the length of the second receiving stub is the waveguide wavelength.

[0064] In one embodiment, the spacing between each of the first transmitting branches and the spacing between each of the second transmitting branches are both the waveguide wavelength of the current medium.

[0065] In one embodiment, the spacing between each of the first receiving branches and the spacing between each of the second receiving branches are both the waveguide wavelength of the current medium.

[0066] The length of the first transmitting stub can be half the waveguide wavelength of the current medium, i.e., 1 / 2λ. gThe length of the second transmitting stub is equal to the waveguide wavelength, i.e., λ. g The length of the first receiving stub can also be half the waveguide wavelength of the current medium, λ. g / 2, the length of the second receiving stub can also be the waveguide wavelength, i.e., λ. g .

[0067] The spacing between each first transmitting branch, the spacing between each second transmitting branch, the spacing between each first receiving branch, and the spacing between each second receiving branch are used to determine the detection direction of the antenna device. In the embodiments of this application, the spacing between each first transmitting branch, the spacing between each second transmitting branch, the spacing between each first receiving branch, and the spacing between each second receiving branch are all the guided wave wavelength of the current medium, so that the detection direction of the antenna device is ±(20°~60°).

[0068] This application provides an antenna device for a sensor according to Embodiment 2, comprising a transmitting antenna and a receiving antenna. The transmitting antenna includes a first feed line, at least one first transmitting stub, and at least one second transmitting stub. The first and second transmitting stubs are alternately distributed on both sides of the first feed line along its extension direction. The length of the second transmitting stub is greater than the length of the first transmitting stub. The transmitting antenna exhibits a beam deflection characteristic. The receiving antenna includes a second feed line, at least one first receiving stub, and at least one second receiving stub. The first and second receiving stubs are alternately distributed on both sides of the second feed line along its extension direction. The length of the second receiving stub is greater than the length of the first receiving stub. For any transceiver system, the receiving antenna has a mirror image structure of the transmitting antenna. The receiving antenna exhibits a beam deflection characteristic, but its beam deflection direction is mirrored that of the transmitting antenna. The transceiver system formed by the transmitting and receiving antennas, based on the beam deflection characteristics of the mirror image of the two antennas, can be used to detect targets within a specific beam range. In the above technical solution, the transmitting antenna and the receiving antenna can constitute an antenna device, since the transmitting antenna and the receiving antenna are mirror images of each other. Therefore, the transmission and reception patterns of the transmitting antenna and the receiving antenna are also mirror images of each other. Superimposing the patterns of the receiving antenna and the transmitting antenna yields the transmission and reception pattern of the antenna device. Furthermore, the spacing between adjacent first and second transmitting stubs in the transmitting antenna determines the transmission pattern, and the spacing between adjacent first and second receiving stubs in the receiving antenna determines the receiving pattern. This, in turn, allows for the determination of the transmission and reception pattern of the antenna system, enabling focused detection in the horizontal direction. Moreover, by integrating the transmitting and receiving antennas with a relatively small area, the antenna device achieves improved integration while meeting the requirement for focused detection in the desired direction.

[0069] Example 3

[0070] Based on the above example description, the following antenna device can also be considered as an embodiment of this application: The antenna device includes a transmitting antenna and a receiving antenna. The transmitting antenna has a radiation pattern with beam deflection characteristics; the receiving antenna also has a beam deflection characteristic, but its beam deflection direction is a mirror image of the transmitting antenna. Since both the transmitting and receiving antennas are asymmetrical structures, the combined radiation patterns of the transmitting and receiving antennas can form radiation at a specific angle. In other words, the antenna device can avoid the design of a power divider module, preventing the influence of the power divider's manufacturing precision on antenna performance. Furthermore, it can greatly improve the overall integration of the sensor.

[0071] In some examples shown above, the structure of the transmitting antenna is the same as that of the receiving antenna. In other examples, the structures of the transmitting and receiving antennas may differ, depending on the antenna space reserved for the actual sensor in the electronic device and / or the partial antenna structure already configured in the electronic device. For example, within the space where the antenna device can be arranged, the transmitting antenna in the antenna device is as shown in any of the examples in Embodiments 1 and 2, and has the characteristic of pattern beam deflection; while the corresponding receiving antenna may adopt, as shown in... Figure 1 As shown, it also possesses the characteristic of pattern beam deflection, and the beam deflection direction is a mirror image of the transmitting antenna. Based on the above transmitting and receiving antennas, the antenna system will be able to detect specific detection directions.

[0072] It should be noted that the above examples are not mutually exclusive, and the examples can be combined to form more complex antenna devices, which will not be detailed here. It should also be noted that the antenna devices mentioned in the above examples can be configured within the sensor chip, or connected to the sensor chip via chip pins.

[0073] Here, the term chip (integrated circuit, abbreviated as IC, also known as chip) refers to a circuit structure manufactured on a semiconductor wafer by miniaturizing circuits (mainly including semiconductor devices, but also passive components, etc.). It includes a die and a package structure. A die refers to a semiconductor circuit structure produced in a foundry, which includes solder pads for packaging. These dies are typically not directly used in actual circuits, but are encapsulated using chip packaging technology to obtain the chip. The package structure covers the die and includes pins to communicate between the internal and external circuits formed within the die; it also includes a housing for fixing, sealing, and protecting the die, and for enhancing its electrothermal performance. Here, the sensor chip (also known as a sensor chip, radar chip, radar, etc.) utilizes the technology used to manufacture the aforementioned chip to create circuits including antennas, forming a miniaturized, highly integrated electronic device.

[0074] In some examples of sensor chips, the antenna device may be configured on the surface of the die or within a package structure. For example, the chip may be an AiP (Antenna-In-Package), an AoP (Antenna-On-Package), or an AoC (Antenna-On-Chip) chip structure.

[0075] In other sensor chips, the antenna can be configured outside the sensor chip and connected to the chip via the sensor chip's pins.

[0076] In an optional embodiment, the sensing chips may be equivalent to those described in any embodiment of this application, that is, the sensing chips may have the same structure and function as each other, and may also be combined with each other to form a cascaded structure. For the sake of simplicity, the details will not be elaborated here, but it should be understood that the technology that those skilled in the art should know based on the content described in this application should be included within the scope of this application.

[0077] Example 4

[0078] This application provides a radar according to embodiment four, including: an antenna device as described in any one of embodiments one to three; a signal transceiver connected to the antenna device, for transmitting a detection signal wave through a transmitting antenna in the antenna device, and for sensing an echo electrical signal from the echo signal wave through a receiving antenna in the antenna device, so as to output a baseband digital signal after processing the echo signal wave; wherein the echo signal wave is formed by the detection signal wave being reflected by a detection object (also known as a target object, or obstacle, etc.).

[0079] Figure 9 This application provides a schematic diagram of the structure of a radar according to Embodiment 4. Figure 9 As shown, the radar includes an antenna device and a signal transceiver device, which are interconnected.

[0080] The radar provided in this application embodiment can output a digital signal within the directional range by processing the echo electrical signal based on the antenna device included in the radar, and has the same beneficial effects as the antenna device provided in Embodiments 1 to 3.

[0081] Furthermore, the signal transceiver includes a signal transmitter and a signal receiver. Here, the antenna device and the signal transceiver are both configured according to the radar's needs for environmental detection and signal processing. For example, the signal transceiver is used to transmit detection signal waves and receive echo signal waves at a preset frequency band or a fixed frequency.

[0082] The signal transmitter is used to transmit the changing electrical signal of the corresponding probe signal wave to the transmitting antenna in the antenna device. Specifically, the signal transmitter performs frequency modulation / phase modulation processing on the reference electrical signal provided by the signal source and modulates it into a transmitting electrical signal with changing current in the radio frequency band, which is then output to the transmitting antenna. For example, the signal transmitter modulates the probe electrical signal to radio frequency and feeds it to the transmitting antenna, so that the transmitting antenna generates a probe signal wave with a center frequency in a frequency band such as 64 GHz or 77 GHz. The signal transmitter can generate a probe signal wave with a fixed center frequency or a probe signal wave with a center frequency and a preset bandwidth. Taking the probe signal wave including at least one chirp signal as an example, where the chirp signal is an electromagnetic wave signal formed based on a linear frequency modulation period, the signal transmitter performs frequency multiplication processing on the signal source based on the linear frequency modulation period and feeds it to the transmitting antenna to transmit a probe signal wave containing the chirp signal. When the probe signal wave is reflected by an object, an echo signal wave is formed. The receiving antenna receives the echo signal wave and generates an echo electrical signal.

[0083] The signal receiver is used to demodulate and filter the echo signal output by the receiving antenna in the antenna device using the probe electrical signal that generates the probe signal wave, so as to output a baseband digital signal.

[0084] In some examples, the radar further includes a signal processor. The signal processor is connected to the signal transceiver and is used to extract measurement information from the baseband digital signal through signal processing and output measurement data. The signal processing includes digital signal processing based on phase, frequency, and time domain parameters of at least one signal to be processed provided by at least one receiving antenna. The measurement data includes at least one of the following: distance data representing the relative distance to at least one detected obstacle; velocity data representing the relative velocity of at least one detected obstacle; angle data representing the relative angle of at least one detected obstacle, etc.

[0085] When each receiving antenna receives an echo signal wave from the same detection signal wave, the signal processor processes the baseband digital signal to obtain measurement data based on the number of Doppler sampling points set according to the measurement resolution.

[0086] When multiple probe signal waves are emitted by the same transmitting antenna, and each receiving antenna receives the corresponding echo signal wave for each probe signal wave, the signal processor can output measurement data including speed by processing the different baseband digital signals received by the same receiving antenna at different times.

[0087] When at least one probe signal wave is emitted by the same transmitting antenna, and each of the multiple receiving antennas receives the corresponding echo signal wave for each probe signal wave, and forms the corresponding echo electrical signal, the signal processor determines the virtual transceiver channel corresponding to the distance-velocity value containing the distance-Doppler index, obtains the angle of arrival for each distance-velocity value, and outputs measurement data containing distance, velocity, and angle.

[0088] In an optional embodiment, the antenna device described in this application can be applied to products or application scenarios with special requirements for antenna radiation patterns, such as vehicle-mounted millimeter-wave angle radar. Specifically, the radiated power in the direction perpendicular to the antenna radiation surface is less than the radiated power in other specific directions (e.g., Figure 2 In the scenario shown, by asymmetrically setting the radiating branches on both sides of the feed line in a single-branch antenna, the antenna pattern function provided by the traditional multi-branch antenna is realized, so that no power divider is needed in a single antenna. That is, the single antenna in this application does not contain a power divider module, which can effectively reduce the design complexity and save the area occupied by the antenna, thereby effectively improving the integration of the radar system.

[0089] Furthermore, for the same transceiver channel, the receiving antenna can be a mirror image of the transmitting antenna to further enhance the beamforming effect of the transceiver channel. Optionally, for the mirror-structured transceiver antenna, the transmitting and receiving antennas can be arranged symmetrically in a mirror image based on a preset center line, provided that the arrangement space allows, to further enhance the beamforming effect.

[0090] Example 5

[0091] This application provides an electronic device in embodiment five, including: a radar as described in embodiment four; a processor connected to the radar; and a memory connected to the processor.

[0092] Figure 10 This is a schematic diagram of the structure of an electronic device provided in Embodiment 5 of this application, as shown below. Figure 10 As shown, the electronic device includes a processor 110, a memory 120, and a radar 130; the number of processors 110 in the electronic device can be one or more. Figure 10 Taking a processor 110 as an example; the processor 110, memory 120, and radar 130 in the electronic device can be connected via a bus or other means. Figure 10 Taking the example of a connection between China and Israel via a bus.

[0093] Processor 110 may include one or more central processing units (CPUs), and may also include multiple processors 110. Each CPU in these processors 110 may be a single-core processor or a multi-core processor. Processor 110 here may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0094] The memory 120 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a given function; the data storage area may store data created based on terminal usage. Furthermore, the memory 120 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid-state storage device. In some instances, the memory 120 may further include memory remotely located relative to the processor 110, which can be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0095] Radar 130 can output digital signals obtained by processing echo electrical signals within a directional range; wherein the echo signal wave is formed by the reflection of the detection signal wave.

[0096] The radar 130 included in the electronic device provided in this application embodiment can obtain a baseband digital signal based on the processing of the echo electrical signal by the antenna device included in the radar, and has the same beneficial effects as the antenna device provided in any of Embodiments 1 to 3.

[0097] In an optional embodiment, the aforementioned electronic device body can be a component or product applied in fields such as smart homes, transportation, smart homes, consumer electronics, monitoring, industrial automation, in-cabin detection, and healthcare. For example, the device body can be intelligent transportation equipment (such as cars, bicycles, motorcycles, ships, subways, trains, etc.), security equipment (such as cameras), liquid level / flow rate detection equipment, smart wearable devices (such as wristbands, glasses, etc.), smart home equipment (such as robot vacuum cleaners, door locks, televisions, air conditioners, smart lights, etc.), various communication devices (such as mobile phones, tablets, etc.), as well as devices such as barriers, intelligent traffic lights, intelligent signs, traffic cameras, and various industrial robotic arms (or robots). It can also be various instruments for detecting vital signs parameters and various devices equipped with such instruments, such as in-cabin detection in automobiles, indoor personnel monitoring, smart medical devices, and consumer electronic devices.

[0098] Taking the detection inside a car cabin as an example, the antenna device provided in this application can detect the area of ​​the front and rear seats inside the car cabin. Electronic devices equipped with the antenna device can perform functions such as vital sign detection or detection of the presence or absence of living beings based on the signals of the target objects detected by the antenna device within this area.

[0099] Taking the automatic assisted driving of automobiles as an example, the antenna device provided in this application can detect targets within a range of 5-100m at the front and rear corners of the automobile. Electronic devices equipped with the antenna device can perform automatic assisted driving control operations such as reversing prompts and emergency braking based on the signals of the targets detected by the antenna device within this range.

[0100] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the appended claims.

Claims

1. An antenna device for a sensor, characterized in that, The device includes a transmitting antenna and a receiving antenna. The transmitting antenna includes: a first feed line, at least one first transmitting stub, and at least one second transmitting stub; the first transmitting stub and the second transmitting stub are alternately distributed on both sides of the first feed line along the extension direction of the first feed line; the length of the second transmitting stub is greater than the length of the first transmitting stub; and the two sides adjacent to the first transmitting stub are both second transmitting stubs. The receiving antenna has a structure that is a mirror image of the transmitting antenna; The transceiver system formed by the transmitting and receiving antennas is used to detect targets within the corresponding beam range based on the beam deflection characteristics of the formed antenna image.

2. The antenna device for a sensor according to claim 1, characterized in that, The length of the first transmitting stub is half the waveguide wavelength of the current medium, and the length of the second transmitting stub is the waveguide wavelength.

3. The antenna device for a sensor according to claim 1, characterized in that, The spacing between each of the first transmitting branches and the spacing between each of the second transmitting branches are both the waveguide wavelength of the current medium.

4. An antenna device for a sensor, characterized in that, The device includes a transmitting antenna and a receiving antenna, wherein both the transmitting and receiving antennas have beam deflection characteristics; the beam deflection characteristics of the receiving antenna are mirror images of those of the transmitting antenna; the transmitting antenna includes: a first feed line, at least one first transmitting stub, and at least one second transmitting stub; the first and second transmitting stubs are alternately distributed on both sides of the first feed line along its extension direction; the length of the second transmitting stub is greater than the length of the first transmitting stub; and the two sides adjacent to the first transmitting stub are both second transmitting stubs. The transceiver system formed by the transmitting and receiving antennas is used to detect targets within the corresponding beam range based on the beam deflection characteristics of the formed antenna image.

5. The antenna device for a sensor according to claim 4, characterized in that, The receiving antenna includes: a second feed line; and at least one first receiving stub and at least one second receiving stub respectively connected to the second feed line; The first receiving stub and the second receiving stub are staggered on both sides of the second feed line along the extension direction of the second feed line; and the length of the second receiving stub is greater than the length of the first receiving stub.

6. The antenna device for a sensor according to claim 5, characterized in that, The length of the first receiving stub is half the waveguide wavelength of the current medium, and the length of the second receiving stub is the waveguide wavelength.

7. The antenna device for a sensor according to claim 6, characterized in that, The spacing between each of the first receiving branches and the spacing between each of the second receiving branches are both the waveguide wavelength of the current medium.

8. A radar, characterized in that, include: Antenna device as claimed in any one of claims 1-3 or any one of claims 4-7; A signal transceiver connected to the antenna device is used to transmit a detection signal wave through the transmitting antenna in the antenna device and to receive an echo signal wave through the receiving antenna in the antenna device, so as to output a baseband digital signal after processing the echo signal wave. The echo signal wave is formed by the reflection of the detection signal wave by the detection object.

9. An electronic device, characterized in that, include: The radar as described in claim 8; The processor connected to the radar; And the memory connected to the processor.

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