A carrier, a radio frequency module, a sensor and a device

Abstract

This application relates to the field of radio frequency (RF) technology, and discloses a carrier, an RF module, a sensor, and a device. At least one groove structure is formed on a first surface of the carrier, the groove structure surrounding an antenna mounting area for mounting an antenna; wherein the depth of the groove structure is (2n+1)λ / 4, where n is a natural number and λ is the wavelength of the electromagnetic wave radiated by the antenna. The groove structure blocks the transmission of the antenna-radiated signal on the carrier, reduces antenna pattern jitter, and improves antenna radiation performance.

Description

Technical Field

[0001] This application relates to the field of radio frequency technology, and in particular to a carrier, radio frequency module, sensor and device. Background Technology

[0002] Radar is an electronic device that uses electromagnetic waves to detect targets. It emits electromagnetic waves to illuminate a target and receives the echo, thereby obtaining information such as the target's distance from the electromagnetic wave emission point, the rate of change of distance (radial velocity), azimuth, and altitude. The performance of the radar antenna significantly impacts the overall performance of the radar system. For example, millimeter-wave radar, which has gained widespread attention with the development of fields such as autonomous driving, relies heavily on the performance of its antenna to determine the final functionality of the entire millimeter-wave radar system.

[0003] Therefore, in order to achieve more stable and accurate target detection through radar, it is essential to optimize the performance of radar antennas. Utility Model Content

[0004] This application provides a carrier, a radio frequency module, a sensor, and a device that can block the transmission of antenna-radiated signals on the carrier, reduce antenna pattern jitter, and improve antenna radiation performance.

[0005] According to some embodiments of this application, a first aspect of this application provides a carrier, wherein at least one groove structure is provided on a first surface of the carrier, the groove structure is disposed around an antenna setting area, the antenna setting area is used to set an antenna; wherein the depth of the groove structure is (2n+1)λ / 4, n is a natural number, and λ is the wavelength of the electromagnetic wave radiated by the antenna.

[0006] According to some embodiments of this application, a second aspect of this application also provides a carrier, the carrier including a first carrier and a second carrier, the first carrier including an antenna mounting area, the second carrier including at least one first groove structure, the second carrier being disposed on the first carrier surrounding the antenna mounting area, the first groove structure being disposed on the surface of the second carrier away from the first carrier; wherein, the depth of the first groove structure is (2n+1)λ / 4, where n is a natural number and λ is the wavelength of the electromagnetic wave radiated by the antenna.

[0007] According to some embodiments of this application, a third aspect of this application also provides a radio frequency module, including: a carrier, wherein the carrier is the carrier described in the first or second aspect; and an antenna disposed in the antenna setting area.

[0008] According to some embodiments of this application, a fourth aspect of this application also provides a radio frequency module, including: a carrier; a chip package disposed on the surface of the carrier; a waveguide antenna disposed on the surface of the carrier away from the chip package, wherein at least one groove structure is disposed on the side of the waveguide antenna away from the surface of the carrier; wherein the depth of the groove structure is (2n+1)λ / 4, where n is a natural number and λ is the wavelength of the electromagnetic wave radiated by the antenna.

[0009] According to some embodiments of this application, a fifth aspect of this application also provides a radio frequency sensor, including: a radio frequency module as described in the third aspect, or a radio frequency module as described in the fourth aspect.

[0010] According to some embodiments of this application, a sixth aspect of this application also provides an apparatus, including: an apparatus body; and a radio frequency sensor as described in the fifth aspect disposed on the apparatus body; wherein the radio frequency sensor is used for target detection and / or communication to provide reference information to the operation of the apparatus body.

[0011] In this embodiment, since the depth of the groove structure is (2n+1)λ / 4, where n is a natural number and λ is the wavelength of the electromagnetic wave radiated by the antenna, according to the transmission line theory of electromagnetic waves, the signal radiated by the antenna will be blocked when it passes through the groove structure. This reduces the signal transmitted to the edge of the carrier, eliminates the edge effect on the carrier, reduces the jitter of the antenna pattern, and improves the antenna radiation performance.

[0012] Furthermore, when the carrier includes a first carrier and a second carrier, since the antenna and the groove structure are mounted on different carriers, the interference between the antenna and the groove structure is reduced, making the installation of both easier and more effective. This is especially true when the structure of the first carrier is insufficient to support the groove structure, allowing for successful installation using the second carrier.

[0013] In some embodiments, the length direction of the groove structure is perpendicular to the polarization direction of the electromagnetic waves radiated by the antenna. In this case, since the electromagnetic waves radiated by the antenna in the polarization direction are of higher intensity than those in other directions, the groove structure with its length direction perpendicular to the polarization direction will more effectively block the electromagnetic waves radiated by the antenna. The signal transmitted to the edge of the carrier is further reduced, the edge effect on the carrier is further reduced, the jitter of the antenna pattern is further reduced, and the improvement in antenna radiation performance is stronger.

[0014] In some embodiments, at least one groove structure is provided on each side of the antenna mounting area along the polarization direction of the electromagnetic wave radiated by the antenna. In this case, since at least one groove structure is provided on each side of the antenna mounting area along the polarization direction of the electromagnetic wave radiated by the antenna, stronger electromagnetic waves transmitted in the polarization direction will be blocked more effectively, thereby achieving the same or even better blocking effect with fewer groove structures.

[0015] In some embodiments, the groove structure includes at least two rows of metallized blind holes arranged along its length, the metallized blind holes communicating with at least one metal layer inside the carrier. In this case, utilizing the existing metal layer of the carrier to form the groove structure results in a simpler structure, lower implementation difficulty, and lower cost.

[0016] In some embodiments, the second carrier further includes at least one second groove structure disposed on the surface of the second carrier near the first carrier, wherein the depth of the second groove structure is (2n+1)λ / 4, where n is a natural number. In this case, the first groove structure and the second groove structure are respectively disposed on both sides of the second carrier, so that the electromagnetic waves radiated by the antenna will be blocked at multiple levels, thereby further reducing the signal transmitted to the edge of the carrier, further reducing the edge effect on the carrier, further reducing the jitter of the antenna pattern, and improving the antenna radiation performance. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 This is a top view of the AiP RF module;

[0019] Figure 2 yes Figure 1 A cross-sectional view of the radio frequency module shown.

[0020] Figure 3 This is a top view of a carrier provided in one embodiment of this application;

[0021] Figure 4 yes Figure 3 Cross-sectional view of the support structure shown;

[0022] Figure 5 This is a top view of a carrier provided in one embodiment of this application;

[0023] Figure 6 yes Figure 5Cross-sectional view of the support structure shown;

[0024] Figure 7 This is a top view of a carrier provided in one embodiment of this application;

[0025] Figure 8 yes Figure 7 Cross-sectional view of the support structure shown;

[0026] Figure 9 This is a top view of a carrier provided in one embodiment of this application;

[0027] Figure 10 yes Figure 9 Cross-sectional view of the support structure shown;

[0028] Figure 11 This is a top view of a carrier provided in one embodiment of this application;

[0029] Figure 12 yes Figure 11 Cross-sectional view of the support structure shown;

[0030] Figure 13 Is AiP deployed in Figure 7 and Figure 8 The carrier shown, and, Figure 1 and Figure 2 A comparison diagram of the radiation pattern of one receiving antenna of AiP when on the carrier shown;

[0031] Figure 14 Is AiP deployed in Figure 7 and Figure 8 The carrier shown, and, Figure 1 and Figure 2 A comparison diagram of the radiation pattern of another receiving antenna of AiP when on the carrier shown;

[0032] Figure 15 Is AiP deployed in Figure 7 and Figure 8 The carrier shown, and, Figure 1 and Figure 2 A comparison of the radiation patterns of one of AiP's transmitting antennas when mounted on the carrier shown;

[0033] Figure 16 Is AiP deployed in Figure 7 and Figure 8 The carrier shown, and, Figure 1 and Figure 2 A comparison diagram of the radiation pattern of another transmitting antenna of AiP when on the carrier shown;

[0034] Figure 17 Is AiP deployed in Figure 7 and Figure 8 The carrier shown, and, Figure 1 and Figure 2 A comparison chart of the amplitude errors of the AiP transmit and receive channels when on the carrier shown;

[0035] Figure 18 This is a top view of a radio frequency module provided in the embodiments of this application;

[0036] Figure 19 This is a cross-sectional view of another radio frequency module provided in the embodiments of this application;

[0037] Figure 20 This is a cross-sectional view of another radio frequency module provided in the embodiments of this application. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to enable readers to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0039] The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0040] Furthermore, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" indicate that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0041] In related technologies, when the antenna unit in the radio frequency module radiates electromagnetic waves, electromagnetic waves, i.e. surface waves, are transmitted along the surface of the PCB (Printed Circuit Board). When the surface waves are transmitted to the edge, they will produce edge effects, which will cause large jitter in the radiation pattern of the antenna unit and reduce the antenna radiation performance.

[0042] Taking an RF module based on antenna-in-package (AiP) as an example, the chip, transmit antenna (TX), and receive antenna (RX) are integrated inside the package to form an AiP package structure. The AiP package structure is connected to the PCB (using the PCB as the carrier in this example) via solder balls, forming a structure as shown below. Figure 1 and Figure 2 The radio frequency module shown is included. Figure 1 A top view of the RF module is shown. Figure 2 A cross-sectional view of the RF module is shown. Figure 1 and Figure 2 When the RF module shown is working, the AiP package structure in the AiP RF module generates RF signals and radiates them into free space as electromagnetic waves through the transmitting antenna. Because the PCB contains many electronic components, its size is usually large. Consequently, some of the electromagnetic waves radiated by the transmitting antenna propagate to the PCB surface, forming surface waves that travel along the PCB surface to the PCB edge. The radiation of these surface waves at the PCB edge affects the antenna's radiation characteristics, causing deterioration or even distortion of the antenna pattern. When applied to radar, this pattern jitter further degrades detection performance at certain angles and creates imbalances between different transmitting and receiving channels, affecting the radar's angular resolution accuracy.

[0043] It should be noted that, Figure 1 and Figure 2 To facilitate understanding, the details of the AiP package structure and PCB are simplified in the illustration. For example, the PCB dimension in the horizontal direction is larger than the dimension in the pitch direction. In actual applications, the PCB dimension in the pitch direction can be large or small without affecting the simulation results.

[0044] Based on this, this application provides a carrier that reduces the impact of carrier size on the antenna, optimizes antenna pattern jitter, and thus improves antenna radiation performance. The following will combine... Figures 3-12 The structure of the support structure is described.

[0045] In some embodiments, such as Figure 3 and Figure 4 As shown, the first surface 100 of the carrier has at least one groove structure 101, which surrounds the antenna setting area 102. The depth of the groove structure 101 (H shown in the figure) is (2n+1)λ / 4, where the antenna setting area 102 is used to set the antenna, n is a natural number, and λ is the wavelength of the electromagnetic wave radiated by the antenna.

[0046] The carrier body can be a PCB, a flexible printed circuit (FPC), one or more dielectric substrates, or one or more wiring boards, etc.

[0047] In this embodiment, since the groove structure 101 surrounds the antenna mounting area 102 for mounting the antenna, and the depth of the groove structure 101 is (2n+1)λ / 4, where n is a natural number and λ is the wavelength of the electromagnetic wave radiated by the antenna, according to the transmission line theory of electromagnetic waves, when the antenna is mounted in the antenna mounting area 102, the signal radiated by the antenna will pass through the groove structure 101 and be blocked when it travels along the first surface 101 of the carrier to the edge. This reduces the signal transmitted to the edge of the carrier, reduces the edge effect on the carrier, reduces the jitter of the antenna pattern, and improves the antenna radiation performance.

[0048] In some embodiments, such as Figure 3 and Figure 4 As shown, the length direction of the groove structure 101 (represented by direction X in the figure) is not parallel to the polarization direction of the electromagnetic wave radiated by the antenna (represented by direction Y in the figure). Therefore, it can effectively block high-intensity electromagnetic waves propagating along the polarization direction, thereby more effectively blocking surface waves.

[0049] In some embodiments, such as Figure 3 and Figure 4 As shown, the length direction of the groove structure 101 is perpendicular to the polarization direction of the electromagnetic wave radiated by the antenna. Since the electromagnetic wave radiated by the antenna in the polarization direction is stronger than in other directions, the groove structure 101, with its length direction perpendicular to the polarization direction, will more effectively block the surface waves radiated by the antenna. The signal transmitted to the edge of the carrier is further reduced, the edge effect on the carrier is further eliminated, the jitter of the antenna pattern is further reduced, and the improvement in antenna radiation performance is stronger.

[0050] It should be noted that, Figure 3 and Figure 4 The illustration primarily provides an understanding of the polarization direction Y of the antenna radiating electromagnetic waves under linear polarization, and to achieve better surface wave blocking, a groove structure 101 with its length direction X perpendicular to the polarization direction Y is shown. In some embodiments, the polarization of the antenna radiating electromagnetic waves may be circular polarization, in which case the length direction of the groove structure 101 may be perpendicular to the polarization direction at the location of the groove, etc. Alternatively, in some embodiments, the angle between the length direction X and the polarization direction Y of the groove structure 101 may be other than the stated angle.

[0051] In some embodiments, the carrier may have two or more groove structures 101. In this case, multiple blocking of surface waves is achieved by two or more groove structures 101, resulting in better blocking effect, further reduction of signals transmitted to the edge of the carrier, further reduction of edge effects on the carrier, further reduction of antenna pattern jitter, and stronger improvement in antenna radiation performance. Figures 5-8 The illustration shows cases with 2 or 3 groove structures 101. In some embodiments, there may be more than 4, 5, 6 or 7 groove structures 101.

[0052] In some embodiments, two or more groove structures 101 are distributed around the antenna mounting area 102. In this case, the groove structures distributed around the antenna mounting area 102 block electromagnetic waves radiated by the antenna in multiple directions, further reduce the signal transmitted to the edge of the carrier, further reduce the edge effect on the carrier, further reduce the jitter of the antenna pattern, and enhance the antenna radiation performance. Figure 5 and Figure 6 The diagram mainly shows that at least one groove structure 101 is provided on each side of the antenna mounting area 102 located in the polarization direction of the electromagnetic wave radiated by the antenna. In this case, the stronger electromagnetic wave transmitted in the polarization direction will be blocked more effectively, so that the same or even better blocking effect can be achieved with fewer groove structures 101. Figure 7 and Figure 8 This mainly illustrates a scenario where the antenna mounting area 102 has two groove structures on each side of the polarization direction of the electromagnetic wave radiated by the antenna. In some embodiments, the number of multiple groove structures 101 on the same side can be set according to requirements, such as three or four; in some embodiments, the number of multiple groove structures 101 on different sides can be the same or different, which will not be elaborated here or thereafter.

[0053] In some embodiments, such as Figures 3-8 As shown, the groove structure 101 includes two rows of metallized blind holes 111 arranged along the length direction. The metallized blind holes 111 are connected to the metal layer 104 inside the carrier near the insulating dielectric layer 103. In this case, the groove structure is formed by utilizing the existing metal layer 104 of the carrier, which is simple in structure, easier to implement, and lower in cost.

[0054] In some embodiments, the groove structure 101 described above can be formed by drilling holes in the area where the surface metal layer has been removed after removing the metal layer from the surface of the carrier, thereby forming a blind hole 111 with the required depth.

[0055] It should be noted that, Figures 3-8For ease of understanding, only the case where the metallized blind via 111 communicates with the metal layer 104 inside the carrier near the insulating dielectric layer 103 is shown. In practical applications, the metallized blind via 111 can be formed by cutting through the multiple metal layers inside the multi-layer carrier body, depending on the carrier design. That is, the metallized blind via 111 can communicate with at least one metal layer 104 inside the carrier body, thereby reducing the requirements for the manufacturing process while still satisfying the requirement that the depth of the groove structure 101 is (2n+1)λ / 4.

[0056] In some embodiments, such as Figure 7 and Figure 8 As shown, two adjacent groove structures 101 share a row of metallized blind holes 111 arranged along the length direction. In this way, by sharing the metallized blind holes 111, the structural complexity is reduced, the implementation difficulty is reduced, and the cost is also lower.

[0057] certainly, Figure 7 and Figure 8 The diagram mainly illustrates the case where two groove structures 101 share a metallized blind hole 111. In some embodiments, three groove structures 101 may be formed by four columns of metallized blind holes 111 arranged along the length direction, or adjacent groove structures 101 may not share a column of metallized blind holes 111 arranged along the length direction. These will not be described in detail here or thereafter.

[0058] In some embodiments, such as Figure 9 and Figure 10 As shown, the carrier includes a first carrier 105 and a second carrier 106. The first carrier 105 includes an antenna mounting area 102, and the second carrier 106 includes at least one first groove structure 101(A). The second carrier 106 is disposed on the first carrier 105 surrounding the antenna mounting area 102, and the first groove structure 101(A) is disposed on the surface of the second carrier 106 away from the first carrier 105. The depth of the first groove structure 101(A) is (2n+1)λ / 4, where n is a natural number and λ is the wavelength of the electromagnetic wave radiated by the antenna. Since the carrier is divided into two parts, the first carrier 105 and the second carrier 106, and the second carrier 106 surrounds the antenna mounting area 102 and includes the first groove structure 101a, the interference between the antenna mounting on the carrier and the first groove structure 101a is reduced, making the antenna mounting and the first groove structure 101a easier to implement and achieving better results. Especially when the size of the first carrier 105 is limited or the signal routing is restricted, it is difficult to support the setting of the first groove structure 101a in the first carrier 105. In this case, the setting of the second carrier 106 can support the flexible setting of the first groove structure 101a.

[0059] In some embodiments, such as Figure 11 and Figure 12 As shown, the second carrier 106 further includes at least one second groove structure 101b, which is disposed on the surface of the second carrier 106 near the first carrier 105. The depth of the second groove structure 101b is (2n+1)λ / 4, where n is a natural number. In this way, not only is the first groove structure 101a disposed on one surface of the second carrier 106, but the second groove structure 101b is also disposed on the other surface of the second carrier 106. This allows the surface waves radiated by the antenna to be blocked in multiple directions, thereby further reducing the signal transmitted to the edge of the carrier and further reducing the jitter of the antenna pattern.

[0060] It should be noted that, Figures 9-12 The arrangement of the second carrier 106 is only one example. In some embodiments, only one second carrier 106 may be provided, or three or more second carriers 106 may be provided. Alternatively, in some embodiments, the second carrier may be located on other sides of the antenna setting area 102, etc., which will not be described in detail here and thereafter.

[0061] It should also be noted that, Figures 9-12 The main purpose of this illustration is to show the surface of the carrier, which includes the first carrier 105, the second carrier 106, and the first groove structure 101a and the second groove structure 101b. Therefore, other details of the carrier are not shown. For example, the relevant details of the first groove structure 101a and the second groove structure 101b are not shown. However, the first groove structure 101a and the second groove structure 101b on the second carrier 106 can be set with reference to the details of the groove structure 101 provided in the aforementioned embodiment, which will not be repeated here.

[0062] To facilitate understanding of the effect of the carrier provided in the embodiments of this application on suppressing jitter on the antenna pattern, the following will be combined with Figures 13-17 The AiP package structure shown (with 6 transmit antennas (TX0, TX1, TX2, TX3, TX4, TX5) and 6 receive antennas (RX0, RX1, RX2, RX3, RX4, RX5)) is deployed in... Figure 1 and Figure 2 On the carrier shown, deployed on Figure 7 and Figure 8 The simulation results on the carrier shown are illustrated in the comparison chart.

[0063] in, Figures 13-16 The image shows the deployment in Figure 1 and Figure 2 On the carrier shown, deployed on Figure 7 and Figure 8 The diagram shows a comparison of the radiation patterns of a single antenna in an AiP package structure when mounted on the carrier shown. Figures 13-14 The dashed line in the middle represents the deployment. Figure 1 and Figure 2 When placed on the carrier shown, the antenna patterns of receiving antennas RX0 and RX2 are shown. Figures 13-14 The solid lines in the middle represent deployments. Figure 7 and Figure 8 When placed on the carrier shown, the antenna patterns of receiving antennas RX0 and RX2 are shown. Figures 15-16 The dashed line in the middle represents the deployment. Figure 1 and Figure 2 When mounted on the carrier shown, the antenna patterns of transmitting antennas TX3 and TX5 are shown. Figures 15-16 The solid lines in the middle represent deployments. Figure 7 and Figure 8 The antenna patterns of transmitting antennas TX3 and TX5 are shown on the carrier shown. Figure 17 The image shows the deployment in Figure 1 and Figure 2 On the carrier shown, deployed on Figure 7 and Figure 8 The diagram shows a comparison of the amplitude errors of the 36 transmit / receive (TRX) channels between antennas in the AiP package structure when placed on the carrier.

[0064] also, Figures 13-16 In the graph, the horizontal axis represents angle, in degrees; the vertical axis represents signal gain, in decibels (dB). Figure 17 In the graph, the horizontal axis represents angles, in degrees; the vertical axis represents amplitude error.

[0065] Depend on Figure 13 and Figure 16 It can be seen that, compared to deploying the AiP encapsulation structure on... Figure 1 and Figure 2 The AiP packaging structure is deployed on the carrier shown. Figure 7 and Figure 8 On the carrier shown, the jitter of the receiving and transmitting antennas is reduced, and large indentations at certain angles can also be significantly optimized.

[0066] Depend on Figure 17 It can be seen that, compared to deploying AiP on Figure 1 and Figure 2 The AiP packaging structure is deployed on the carrier shown. Figure 7 and Figure 8 On the carrier shown, the radiation pattern of the 36 transceiver channels has optimized the amplitude error from 13dB to 6dB, and the radiation pattern of the transceiver channels has higher consistency.

[0067] The structural divisions of the various embodiments described above are only for clarity of description. In implementation, they can be merged into one structure or some structures can be split into multiple structures. As long as they include the same logical relationship, they are all within the protection scope of this patent. Adding insignificant modifications or introducing insignificant designs, but without changing the core design of its structure, are also within the protection scope of this patent.

[0068] This application also provides a radio frequency module, such as... Figures 18-19 As shown, the radio frequency module includes a carrier and an antenna disposed in the antenna mounting area of ​​the carrier. The carrier is any of the carriers provided in the preceding embodiments, and will not be described in detail here.

[0069] In some embodiments, such as Figure 18 As shown, the antenna is a printed antenna.

[0070] In some embodiments, such as Figure 19 As shown, the antenna is an AiP package structure.

[0071] The antennas and their installation on the carrier have been described in relevant technologies, so they will not be repeated here.

[0072] It is not difficult to see that this embodiment is a radio frequency device embodiment corresponding to the carrier embodiment, and this embodiment can be implemented in conjunction with the radio frequency device embodiment. The relevant technical details mentioned in the radio frequency device embodiment are still valid in this embodiment, and will not be repeated here to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied to the radio frequency device embodiment.

[0073] Furthermore, in order to highlight the innovative aspects of this application, no units that are not closely related to solving the technical problems proposed in this application are introduced in this embodiment, but this does not mean that there are no other units in this embodiment.

[0074] This application also provides a radio frequency module, such as... Figure 20 As shown, it includes:

[0075] Carrier;

[0076] A chip package disposed on the surface of a carrier;

[0077] A waveguide antenna is disposed on the surface of the carrier away from the chip package, and at least one groove structure is provided on the side of the waveguide antenna away from the surface of the carrier.

[0078] The depth of the groove structure is (2n+1)λ / 4, where n is a natural number and λ is the wavelength of the electromagnetic wave radiated by the antenna.

[0079] It should be noted that the setting of the groove structure has been explained previously, so it will not be repeated here.

[0080] This application also provides a radio frequency sensor, including: the radio frequency module as described in any of the above embodiments.

[0081] In some embodiments, the radio frequency sensor is used to transmit electromagnetic waves via a transmitting antenna and to receive echoes reflected by a target object using a receiving antenna, and to process the transmitted radio frequency signals.

[0082] In some embodiments, the transmitted electromagnetic wave is a Frequency Modulated Continuous Wave (FMCW) signal. In this case, the radio frequency (RF) sensor transmits the FMCW signal via a transmitting antenna based on a reference frequency, receives the echo reflected by the target object using a receiving antenna, and performs down-conversion processing on the transmitted FMCW signal to generate and output an intermediate frequency (IF) signal. The RF sensor is also used to convert the IF signal into a digital signal for signal processing to achieve target detection.

[0083] In some embodiments, the frequency-modulated continuous wave signal is a millimeter-wave signal, so that electronic devices equipped with electromagnetic wave sensors can be applied to fields such as autonomous driving, industrial automation, smart home appliances, and security inspection.

[0084] For example, an RF sensor generates a chirp signal according to a preset continuous frequency modulation method; the RF transmission signal is obtained through frequency doubling and fed to the transmitting antenna to transmit a corresponding detection signal wave. When the detection signal wave is reflected by an object, an echo signal wave is formed. The echo signal wave is converted into an RF received signal by a receiving antenna. The RF sensor uses the RF transmission signal to perform down-conversion, filtering, and other processing on the RF received signal, and then performs analog-to-digital conversion to output a baseband digital signal representing the difference frequency between the detection signal wave and the echo signal wave. Then, signal processing is used to extract measurement information from the baseband digital signal and output measurement data. The signal processing includes digital signal processing calculations based on phase, frequency, and time domain 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] This application also provides a device including the aforementioned radio frequency sensor.

[0086] In some embodiments, the device includes: a device body; and radio devices such as radio frequency sensors as described in the above embodiments disposed on the device body. The device body is a structure that carries and is signal-connected to the radio devices. The radio devices transmit and / or receive radio signals processed by a phase shifter to achieve functions such as target detection and / or communication within the beam scanning range, thereby providing the device body with target detection information and / or communication information, and thus assisting or even controlling the operation of the device body.

[0087] In some embodiments, the device comprising the device body and at least one aforementioned wireless device can be a component or product applied in fields such as smart homes, transportation, smart homes, consumer electronics, surveillance, industrial automation, in-cabin detection, and healthcare. For example, the device body can be intelligent transportation equipment (such as automobiles, 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.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] Those skilled in the art will understand that the above embodiments are specific examples of implementing this application, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this application.

Claims

1. A carrier, characterized in that At least one groove structure is provided on the first surface of the carrier, the groove structure is provided around the antenna setting area, the antenna setting area is used to set the antenna; The depth of the groove structure is (2n+1)λ / 4, where n is a natural number and λ is the wavelength of the electromagnetic wave radiated by the antenna.

2. Carrier according to claim 1, characterized in that The length direction of the groove structure is perpendicular to the polarization direction of the electromagnetic waves radiated by the antenna.

3. Carrier according to claim 1, characterized in that At least one groove structure is provided on each side of the antenna mounting area located in the polarization direction of the electromagnetic wave radiated by the antenna.

4. The carrier of claim 1, wherein, The groove structure includes at least two rows of metallized blind holes arranged along the length direction, and the metallized blind holes are in communication with at least one metal layer inside the carrier body.

5. A carrier, characterized in that include: The carrier includes a first carrier and a second carrier. The first carrier includes an antenna setting area. The second carrier includes at least one first groove structure. The second carrier is disposed on the first carrier around the antenna setting area. The first groove structure is disposed on the surface of the second carrier away from the first carrier. The depth of the first groove structure is (2n+1)λ / 4, where n is a natural number and λ is the wavelength of the electromagnetic wave radiated by the antenna.

6. Carrier according to claim 5, characterized in that The second carrier further includes at least one second groove structure, which is disposed on the surface of the second carrier near the first carrier, wherein the depth of the second groove structure is (2n+1)λ / 4, where n is a natural number.

7. Carrier according to claim 6, characterized in that Both the first groove structure and the second groove structure include at least two rows of metallized blind holes arranged along the length direction, and the metallized blind holes are in communication with at least one metal layer inside the second carrier body.

8. A radio frequency module, characterized by include: A carrier, wherein the carrier is the carrier as described in any one of claims 1 to 4, or the carrier is the carrier as described in any one of claims 5 to 7; Antennas are located in the antenna setting area.

9. The radio module of claim 8, wherein, The antenna is an onboard antenna with an AiP package structure.

10. A radio frequency module, characterized by include: Carrier; A chip package disposed on the surface of the carrier; A waveguide antenna is disposed on the surface of the carrier away from the chip package, and at least one groove structure is provided on the side of the waveguide antenna away from the surface of the carrier. The depth of the groove structure is (2n+1)λ / 4, where n is a natural number and λ is the wavelength of the electromagnetic wave radiated by the antenna.

11. A radio frequency sensor, characterized by include: The radio frequency module as described in any one of claims 8-10.

12. An apparatus, comprising: include: Equipment body; And the radio frequency sensor as described in claim 11 disposed on the device body; The electromagnetic wave sensor is used for target detection and / or communication to provide reference information for the operation of the device body.

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