Antenna structure, radio frequency device and millimeter wave radar

Abstract

An antenna structure, a radio frequency device and a millimeter wave radar wherein the antenna structure has an antenna proximal side and an antenna distal side, at least one waveguide port connected to a signal being arranged on the antenna proximal side; the far side of the antenna is provided with a curved surface, and the curved surface is provided with at least one antenna radiation part which transmits a signal to an environment space or receives a signal from the environment space. A waveguide channel is arranged in the antenna structure, and each waveguide port is connected with at least one antenna radiation part through the waveguide channel.

Description

Technical Field

[0001] This article relates to antenna communication technology, particularly to an antenna structure, a radio frequency device and a millimeter wave radar. Background Art

[0002] Figure 1 FIG. 1 is a schematic diagram of the deployment of the antenna structure in the millimeter wave radar in the related technology. Figure 1 As shown, due to the limitation of the PCB board-level structure, the antenna structures deployed on the PCB are all planar microstrip antennas, that is, all antennas and feeders can only be located on the same plane, which greatly limits the flexibility of antenna array and the improvement of the performance of the antenna itself, and brings great limitations to the antenna performance and array. Summary of the invention

[0003] In order to solve any of the above technical problems, the embodiments of the present application provide an antenna structure, a radio frequency device and a millimeter wave radar.

[0004] In order to achieve the purpose of the embodiment of the present application, the embodiment of the present application provides an antenna structure, which has a proximal side of the antenna and a distal side of the antenna, and at least one waveguide port for connecting the signal is arranged on the proximal side of the antenna; the distal side of the antenna has a curved surface, and at least one antenna radiating portion for transmitting signals to the ambient space or receiving signals from the ambient space is arranged on the curved surface; a waveguide channel is arranged in the antenna structure, and each of the waveguide ports is connected to at least one antenna radiating portion through the waveguide channel.

[0005] In an exemplary embodiment, the antenna proximal side having a waveguide opening corresponds to the antenna distal side having a curved surface; or,

[0006] The antenna having multiple waveguide ports has a curved surface at the far side of the antenna corresponding to the near side, wherein the antenna radiating parts connected to each waveguide port are all located on the curved surface; or,

[0007] The antenna having multiple waveguide openings has multiple curved surfaces corresponding to the waveguide openings on the far side of the proximal side, wherein the antenna radiating parts connected to the same waveguide opening are located on the same curved surface.

[0008] In an exemplary embodiment, at least two antenna radiating parts are connected to the waveguide channel, and a signal from the same waveguide port is transmitted through each antenna radiating part, or a signal received by each antenna radiating part is transmitted through the same waveguide port.

[0009] In an exemplary embodiment, the waveguide channel is provided with a power divider structure, and the power divider structure is used to split one signal from the same waveguide port into at least two signals corresponding to at least two antenna radiating parts; or, to integrate the signals received by each antenna radiating part of the at least two antenna radiating parts corresponding to the same waveguide port into one signal.

[0010] In an exemplary embodiment, the waveguide channel includes branch channels corresponding to each antenna radiating portion, wherein some of the branch channels are channels shared by at least some of the antenna radiating portions, and the shared channels constitute the power divider structure.

[0011] In an exemplary embodiment, radiation directions of at least two antenna radiating portions connected to the same waveguide channel are different from each other.

[0012] In an exemplary embodiment, the antenna radiating portion is a waveguide slot antenna, a patch antenna, or a cavity aperture antenna.

[0013] A radio frequency device comprises a chip and a circuit board, wherein the chip comprises a bare chip and a package body encapsulating the bare chip, the circuit board has a first surface and a second surface arranged opposite to each other, and the chip is arranged on the first surface; wherein an antenna structure is arranged on the second surface of the circuit board, wherein at least one antenna structure is the antenna structure described above, and wherein the chip is used to transmit signals through the antenna structure.

[0014] In an exemplary embodiment, at least one radiating structure and a plurality of solder balls arranged around each of the radiating structures are disposed on a surface of the package body facing the circuit board, wherein the radiating structure is connected to the bare die, and the package body is connected to the first surface of the circuit board through the solder balls;

[0015] Waveguide through holes are respectively arranged on the circuit board at locations corresponding to the radiation structures, and the waveguide through holes are arranged in a one-to-one correspondence with the waveguide openings on the antenna structure for signal transmission.

[0016] A millimeter wave radar comprises the radio frequency device mentioned above.

[0017] One of the above technical solutions has the following advantages or beneficial effects:

[0018] The waveguide port and antenna radiating part on the near side of the antenna are used as the medium for external transmission of the antenna structure, and the waveguide channel is used as the medium for internal transmission of the antenna structure. By deploying the antenna radiating part on a curved surface, more possible directions are provided for the strongest radiation direction of the antenna radiating part, providing more flexible design methods for antenna arrays and, at the same time, improving the radiation performance of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0020] Figure 1A schematic diagram of the deployment of the antenna structure in the millimeter wave radar in the related art;

[0021] Figure 2 A schematic diagram of the structure of an antenna structure 100 provided in an embodiment of the present application;

[0022] Figure 3 for Figure 2 An exemplary structural schematic diagram of the antenna structure 100 is shown;

[0023] Figure 4 for Figure 2 Another exemplary structural schematic diagram of the antenna structure 100 is shown;

[0024] Figure 5 for Figure 2 Another exemplary structural schematic diagram of the antenna structure 100 is shown;

[0025] Figure 6 A schematic diagram of the structure of a waveguide channel 30 provided in an embodiment of the present application;

[0026] Figure 7 for Figure 6 Another schematic structural diagram of the waveguide channel 30 shown;

[0027] Figure 8 for Figure 7 Another schematic structural diagram of the waveguide channel 30 shown;

[0028] Fig. 9 A schematic diagram of the structure of a radio frequency device 1000 provided in an embodiment of the present application;

[0029] Fig.10 for Fig. 9 Another structural schematic diagram of the radio frequency device 1000 is shown;

[0030] Fig.11 for Fig. 9 Another structural schematic diagram of the radio frequency device 1000 is shown;

[0031] Fig.12 for Fig. 9 Another structural schematic diagram of the radio frequency device 1000 is shown;

[0032] Fig.13 for Fig. 9 Another schematic structural diagram of the chip 200 is shown. DETAILED DESCRIPTION

[0033] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0034] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application may also be combined with any conventional features or elements to form a unique invention scheme defined by the claims. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in the present application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0035] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be understood by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0036] Figure 2 Schematic diagram of the structure of the antenna structure 100 provided in the embodiment of the present application. Figure 2 As shown, the antenna structure 100 includes an antenna proximal side 10, an antenna distal side 20 having a curved surface Q, and a waveguide channel 30 for realizing signal transmission between the antenna proximal side 10 and the antenna distal side 20; wherein:

[0037] At least one waveguide port 11 for connecting signals is arranged on the proximal side 10 of the antenna;

[0038] The waveguide port 11 is used as a port for a functional unit (eg, a chip) using the antenna structure 100 to transmit signals.

[0039] Specifically, the signal received by the antenna far side 20 can be transmitted through the waveguide channel 30 and then output through the waveguide port 11, or the signal received through the waveguide port can be transmitted to the antenna far side 20 through the waveguide channel 30 so that the antenna far side 20 can continue to transmit the signal.

[0040] In an exemplary embodiment, the waveguide opening 11 may be a through hole on a structure where the antenna proximal side 10 is disposed.

[0041] Taking the antenna structure 100 deployed on a circuit board with a chip installed as an example, the antenna proximal side 10 can be deployed on a side of the circuit board away from the chip, and the waveguide opening 11 can be a through hole of the circuit board for transmitting the chip signal.

[0042] For example, the chip can output the chip signal to the antenna structure 100 through the waveguide port 11, so that the antenna structure 100 outputs the signal to the ambient space of the antenna structure 100; or, the antenna structure 100 outputs the signal received from the ambient space to the chip through the waveguide port 11.

[0043] The antenna far side 20 having the curved surface Q is arranged with at least one antenna radiating portion 21 for transmitting signals to the ambient space or receiving signals from the ambient space;

[0044] Specifically, the antenna distal side 20 has an antenna radiating portion 21 and a curved surface Q for deploying the antenna radiating portion 21 .

[0045] Different from the related art in which the antenna radiating portion 21 is located on the same plane, the antenna radiating portion 21 provided in the embodiment of the present application is deployed on the curved surface Q. Since the strongest radiation direction of the antenna radiating portion 21 is usually the normal direction of the deployment position of the antenna radiating portion 21, when the deployment position is the curved surface Q, there are more possible directions for the strongest radiation direction of the antenna radiating portion 21, which provides more flexible design methods for the antenna array and can improve the radiation performance of the antenna.

[0046] exist Figure 2 In the antenna structure 100 shown, the curved surface Q is illustrated as an arc.

[0047] It should be noted that the "curved surface Q" in the embodiment of the present application is a non-horizontal surface, in which the bending direction and bending angle of the surface can be set arbitrarily and are not limited here.

[0048] Among them, the antenna radiating portion 21 is used to receive signals from the environmental space of the antenna structure 100 and transmit them to the waveguide port 11 through the waveguide channel 30, or, after receiving the signal received by the waveguide port 11 from the waveguide channel 30, transmit the signal to the environmental space of the antenna structure 100.

[0049] The waveguide channel 30 is used to connect the waveguide opening 11 to at least one antenna radiating portion 21 .

[0050] Since the far side 20 of the antenna has a curved surface Q, there is a spatial distance for signal transmission between the waveguide mouth 11 of the proximal side 10 of the antenna and at least one antenna radiating portion 21 of the far side 20 of the antenna. Therefore, the waveguide channel 30 is used to connect the waveguide mouth 11 and at least one antenna radiating portion 21 to realize signal transmission inside the antenna structure 100.

[0051] In practical applications, the waveguide channel 30 and the curved surface Q at the far side 20 of the antenna can be an integrally formed structure.

[0052] The integrally formed structure has a hollow structure inside, and the hollow structure can be used as a waveguide channel 30 .

[0053] The material of the one-piece molded structure may be metal; or, the material of the one-piece molded structure may be plastic, and the internal hollow structure is coated with metal to facilitate signal transmission.

[0054] Based on the above description, it can be known that the antenna structure 100 provided in the embodiment of the present application uses the waveguide port 11 on the proximal side 10 of the antenna and the antenna radiating part as the medium for external transmission of the antenna structure 100, and uses the waveguide channel 30 as the medium for internal transmission of the antenna structure 100. By deploying the antenna radiating part 21 on the curved surface Q, more possible directions are provided for the strongest radiation direction of the antenna radiating part 21, which provides more flexible design methods for antenna arrays and, at the same time, improves the radiation performance of the antenna.

[0055] Figure 3 for Figure 2 FIG. 1 is a schematic diagram of an exemplary structure of an antenna structure 100. Figure 3 As shown, the antenna proximal side 10 of the antenna structure 100 has a waveguide opening 11, and the antenna distal side 20 corresponding to the antenna proximal side 10 has a curved surface Q.

[0056] One end of the waveguide channel 30 inside the antenna structure 100 is connected to the waveguide port 11 , and the other end is connected to at least one antenna radiating portion 21 on the curved surface Q. The curved surface Q may be provided with one or more antenna radiating portions 21 .

[0057] by Figure 3Taking the antenna structure 100 as an example, one end of the waveguide channel 30 is connected to the waveguide port 11, and the other end is connected to three antenna radiating parts 21, namely the first antenna radiating part A1, the second antenna radiating part A2 and the third antenna radiating part A3.

[0058] Furthermore, at least two antenna radiating portions 21 are connected to the waveguide channel 30, and a signal from the same waveguide port 11 is transmitted through each antenna radiating portion 21, or a signal received by each antenna radiating portion 21 is transmitted through the same waveguide port 11.

[0059] by Figure 3 Taking the antenna structure 100 shown as an example, the signal of the same waveguide port 11 is transmitted through the first antenna radiating part A1, the second antenna radiating part A2 and the third antenna radiating part A3, and the signals received by the first antenna radiating part A1, the second antenna radiating part A2 and the third antenna radiating part A3 are transmitted through the same waveguide port 11.

[0060] By transmitting one signal received by the waveguide port 11 through at least two antenna radiating parts 21 with different radiation directions, and outputting multiple signals received by at least two antenna radiating parts 21 as one signal through the waveguide port, wide-beam radiation performance can be achieved.

[0061] Furthermore, the radiation directions of at least two antenna radiating parts 21 connected to the same waveguide channel 30 are different from each other.

[0062] by Figure 3 Taking the antenna structure 100 as an example, the radiation directions of the three antenna radiating portions 21 corresponding to the same waveguide opening 11 are different from each other, that is, the radiation directions of the first antenna radiating portion A1, the second antenna radiating portion A2 and the third antenna radiating portion A3 are different from each other.

[0063] Since the radiation directions of at least two antenna radiation plates 21 corresponding to the same waveguide opening 11 are different, the radiation range of the antenna structure 100 can be increased, and the wide-beam radiation performance of the antenna structure 100 can be effectively improved.

[0064] Figure 4 for Figure 2 Another exemplary structural diagram of the antenna structure 100 is shown. Figure 4 As shown, the antenna proximal side 10 of the antenna structure 100 has a plurality of waveguide openings 11 and an antenna distal side 20 having a curved surface Q.

[0065] The antenna structure 100 is internally provided with waveguide channels 30 corresponding to each waveguide channel 30 , one end of each waveguide channel 30 is connected to the waveguide opening 11 , and the other end is connected to the antenna radiation portion 21 corresponding to the waveguide opening 11 on the curved surface Q.

[0066] by Figure 4 Taking the antenna structure 100 as an example, the antenna structure 100 is provided with two waveguide ports 11, namely, a first waveguide port K1 and a second waveguide port K2. Correspondingly, the antenna structure 100 has two waveguide channels 30, namely, a first waveguide channel D1 corresponding to the first waveguide port and a second waveguide channel D2 corresponding to the second waveguide port K2, wherein:

[0067] One end of the first waveguide channel D1 is connected to the first waveguide port K1, and the other end is connected to three antenna radiating parts, namely the first antenna radiating part A1, the second antenna radiating part A2 and the third antenna radiating part A3;

[0068] One end of the second waveguide channel D2 is connected to the second waveguide port K2, and the other end is connected to two antenna radiating portions, namely the fourth antenna radiating portion A4 and the fifth antenna radiating portion A5.

[0069] Furthermore, at least two antenna radiating portions 21 are connected to the waveguide channel 30, and a signal from the same waveguide port 11 is transmitted through each antenna radiating portion 21, or a signal received by each antenna radiating portion 21 is transmitted through the same waveguide port 11.

[0070] by Figure 4 Taking the antenna structure 100 as an example, the signal of the first waveguide port K1 is transmitted through the first antenna radiating portion A1, the second antenna radiating portion A2 and the third antenna radiating portion A3, and the signals received by the first antenna radiating portion A1, the second antenna radiating portion A2 and the third antenna radiating portion A3 are transmitted through the first waveguide port K1. Similarly, the signal of the second waveguide port K2 is transmitted through the fourth antenna radiating portion A4 and the fifth antenna radiating portion A5, and the signals received by the fourth antenna radiating portion A4 and the fifth antenna radiating portion A5 are transmitted through the second waveguide port K2.

[0071] By transmitting one signal received by the waveguide port 11 through at least two antenna radiating parts 21 with different radiation directions, and outputting multiple signals received by at least two antenna radiating parts 21 as one signal through the waveguide port, wide-beam radiation performance can be achieved.

[0072] Furthermore, the radiation directions of at least two antenna radiating parts 21 connected to the same waveguide channel 30 are different from each other.

[0073] by Figure 4Taking the antenna structure 100 as an example, the radiation directions of the three antenna radiating parts 21 corresponding to the first waveguide port K1 are different from each other, that is, the radiation directions of the first antenna radiating part A1, the second antenna radiating part A2 and the third antenna radiating part A3 are different from each other. Similarly, it can be known that the radiation directions of the two antenna radiating parts corresponding to the second waveguide port K2 are different, that is, the radiation directions of the fourth antenna radiating part A4 and the fifth antenna radiating part A5 are different.

[0074] Since the radiation directions of at least two antenna radiation plates 21 corresponding to the same waveguide opening 11 are different, the radiation range of the antenna structure 100 can be increased, and the wide-beam radiation performance of the antenna structure 100 can be effectively improved.

[0075] Figure 5 for Figure 2 FIG. 1 is another exemplary structural diagram of the antenna structure 100. Figure 5 As shown, the antenna proximal side 10 of the antenna structure 100 has a plurality of waveguide openings 11 and a plurality of curved surfaces Q corresponding to each waveguide opening 11 .

[0076] The antenna structure 100 is internally provided with a waveguide channel 30 corresponding to each waveguide opening 11 , one end of each waveguide channel 30 is connected to the corresponding waveguide opening 11 , and the other end is connected to the antenna radiation portion 21 corresponding to the waveguide opening on the curved surface Q.

[0077] by Figure 5 Taking the antenna structure 100 as an example, the antenna structure 100 is provided with two waveguide ports 11, namely, a first waveguide port K1 and a second waveguide port K2. Correspondingly, the antenna structure 100 has two curved surfaces Q, namely, a first curved surface Q1 corresponding to the first waveguide port and a second curved surface Q2 corresponding to the second waveguide port K2. The antenna structure 100 is further provided with two waveguide channels 30, namely, a first waveguide channel D1 corresponding to the first waveguide port K1 and a second waveguide channel D2 corresponding to the second waveguide port K2, wherein:

[0078] One end of the first waveguide channel D1 is connected to the first waveguide port K1, and the other end is connected to the three antenna radiating portions of the first curved surface Q1, namely the first antenna radiating portion A1, the second antenna radiating portion A2 and the third antenna radiating portion A3;

[0079] One end of the second waveguide channel D2 is connected to the second waveguide port K2, and the other end is connected to the second curved surface Q2 and has two antenna radiating portions, namely the fourth antenna radiating portion A4 and the fifth antenna radiating portion A5.

[0080] Furthermore, at least two antenna radiating portions 21 are connected to the waveguide channel 30, and a signal from the same waveguide port 11 is transmitted through each antenna radiating portion 21, or a signal received by each antenna radiating portion 21 is transmitted through the same waveguide port 11.

[0081] by Figure 5 Taking the antenna structure 100 as an example, the signal of the first waveguide port K1 is transmitted through the first antenna radiating portion A1, the second antenna radiating portion A2 and the third antenna radiating portion A3, and the signals received by the first antenna radiating portion A1, the second antenna radiating portion A2 and the third antenna radiating portion A3 are transmitted through the first waveguide port K1. Similarly, the signal of the second waveguide port K2 is transmitted through the fourth antenna radiating portion A4 and the fifth antenna radiating portion A5, and the signals received by the fourth antenna radiating portion A4 and the fifth antenna radiating portion A5 are transmitted through the second waveguide port K2.

[0082] By transmitting one signal received by the waveguide port 11 through at least two antenna radiating parts 21 with different radiation directions, and outputting multiple signals received by at least two antenna radiating parts 21 as one signal through the waveguide port, wide-beam radiation performance can be achieved.

[0083] Furthermore, the radiation directions of at least two antenna radiating parts 21 connected to the same waveguide channel 30 are different from each other.

[0084] by Figure 5 Taking the antenna structure 100 as an example, the radiation directions of the three antenna radiating parts 21 corresponding to the first waveguide port K1 are different from each other, that is, the radiation directions of the first antenna radiating part A1, the second antenna radiating part A2 and the third antenna radiating part A3 are different from each other. Similarly, it can be known that the radiation directions of the two antenna radiating parts corresponding to the second waveguide port K2 are different, that is, the radiation directions of the fourth antenna radiating part A4 and the fifth antenna radiating part A5 are different.

[0085] Since the radiation directions of at least two antenna radiation plates 21 corresponding to the same waveguide opening 11 are different, the radiation range of the antenna structure 100 can be increased, and the wide-beam radiation performance of the antenna structure 100 can be effectively improved.

[0086] Figure 6 Schematic diagram of the structure of the waveguide channel 30 provided in the embodiment of the present application. Figure 6 As shown, the waveguide channel 30 is provided with a power divider structure 31 for realizing the merging operation of multiple signals and the splitting operation of one signal.

[0087] Specifically, the power divider structure 31 has a first end 31A and at least two second ends 31B, wherein the first end is connected to the waveguide port 11, and the at least two second ends 31B are connected one-to-one to at least two antenna radiating portions 21 corresponding to the waveguide port 11, and is used to receive one signal from the waveguide port 11 from the first end 31A, and split the one signal into at least two signals, and output the at least two split signals to each antenna radiating portion 21 through the second end 31B one-to-one, or, receive at least two signals from at least two antenna radiating portions 21, and merge the at least two received signals into one signal, and output the merged signal to the waveguide port 11 through the first end 31A.

[0088] For example, for a signal from the same waveguide port 11, since the waveguide port 11 corresponds to at least two antenna radiating parts 21, in order to ensure that each antenna radiating part 21 can radiate the signal, it is necessary to allocate a corresponding signal to each antenna radiating part 21. Therefore, the power divider structure 31 is used to split the signal from the same waveguide port 11 into at least two signals corresponding to the at least two antenna radiating parts 21.

[0089] Since the waveguide port 11 corresponds to at least two antenna radiating portions 21, when each antenna radiating portion 21 of the at least two antenna radiating portions 21 corresponding to the same waveguide port 11 receives a signal, in order to ensure that the signal received by each antenna radiating portion 21 can be transmitted through the same waveguide port 11, it is necessary to integrate the multiple signals received by each antenna radiating portion 21 into one signal so as to be transmitted through the same waveguide port 11. Therefore, the power divider structure 31 integrates the various signals received by each antenna radiating portion 21 of the at least two antenna radiating portions 21 corresponding to the same waveguide port into one signal.

[0090] Figure 7 for Figure 6 Another schematic diagram of the structure of the waveguide channel 30 is shown. Figure 7 As shown, the waveguide channel 30 includes branch channels corresponding to each antenna radiating portion 21, namely a first branch channel 32A corresponding to the first antenna radiating portion A1 and a second branch channel 32B corresponding to the second antenna radiating portion A2.

[0091] exist Figure 7 In the waveguide channel 30 shown, the channel shared by the first branch channel 32A and the second branch channel 32B is a section of the waveguide channel 30 adjacent to the waveguide port 11 , and the shared channel constitutes the power divider structure 31 .

[0092] The signal from the waveguide port 11 is split into two signals after being transmitted through the shared channel, one of which is transmitted to the first antenna radiating portion A1 through a channel independently used by the first antenna radiating portion A1, and the other is transmitted to the second antenna radiating portion A2 through a channel independently used by the second antenna radiating portion A2;

[0093] A signal received by the first antenna radiating portion A1 and another signal received by the second antenna radiating portion A2 are combined into one signal in a common channel after being transmitted through their respective independently used channels, and then transmitted to the waveguide port 11 .

[0094] Figure 8 for Figure 7 Another structural schematic diagram of the waveguide channel 30 is shown. Figure 8 As shown, the waveguide channel 30 includes branch channels corresponding to each antenna radiating portion 21, namely a first branch channel 32A corresponding to the first antenna radiating portion A1, a second branch channel 32B corresponding to the second antenna radiating portion A2, and a third branch channel 32C corresponding to the third antenna radiating portion A3.

[0095] exist Figure 8 In the waveguide channel 30 shown, the channel shared by the first branch channel 32A, the second branch channel 32B and the third branch channel 32C is a section of the waveguide channel 30 adjacent to the waveguide port 11; in addition, the channel shared by the second branch channel 32B and the third branch channel 32C is a section of the remaining channel away from the corresponding antenna radiation portion. The above two sections of shared channels constitute the power divider structure 31.

[0096] The signal from the waveguide port 11 is split into two signals after being transmitted through the channel shared by the first branch channel 32A, the second branch channel 32B and the third branch channel 32C, one of which is transmitted to the first antenna radiating portion A1 through a channel independently used by the first antenna radiating portion A1, and the other is further split into two signals after passing through a channel shared by the second antenna radiating portion A2 and the third antenna radiating portion A3, one of which is transmitted to the second antenna radiating portion A2 through a channel independently used by the second antenna radiating portion A2, and the other is transmitted to the third antenna radiating portion A3 through a channel independently used by the third antenna radiating portion A3;

[0097] For a signal received by the first antenna radiating part A1, a signal received by the second antenna radiating part A2, and a signal received by the third antenna radiating part A3, after being transmitted through the channels used independently by each of them, the signal received by the second antenna radiating part A2 and the signal received by the third antenna radiating part A3 are merged into one signal in the shared channel after passing through the channel shared by the second antenna radiating part A2 and the third antenna radiating part A3, and then the merged signal is further merged with the signal received by the first antenna radiating part A1 through the channel shared by the first branch channel 32A, the second branch channel 32B, and the third branch channel 32C, and the merged signal is transmitted to the waveguide port 11.

[0098] In an exemplary embodiment, the antenna radiating portion 21 may be a waveguide slot antenna, for example, a slot disposed in the curved surface Q so that the radio frequency signal is transmitted through a slot mode; or,

[0099] The antenna radiating portion 21 may be a patch antenna, for example, disposed on a side of the curved surface Q away from the waveguide channel 30 through a mounting hole on the curved surface Q; or,

[0100] The antenna radiating portion 21 may be a cavity aperture surface antenna, for example, deployed on one side of the curved surface Q adjacent to the waveguide channel 30 , and transmits radio frequency signals through a through hole on the curved surface Q that matches the antenna radiating portion 21 .

[0101] In practical applications, any of the above-mentioned antenna radiating portions can be selected as the antenna radiating portion 22 , or other structures that can realize the signal radiation function can be selected as the antenna radiating portion 22 .

[0102] Fig. 9 Schematic diagram of the structure of the radio frequency device 1000 provided in the embodiment of the present application. Figure 8 As shown, the radio frequency device 1000 includes a chip 200 and a circuit board 300, wherein the chip 200 includes a bare chip 21 and a package body 22 that packages the bare chip 21, the circuit board 300 has a first surface 31 and a second surface 32 that are arranged opposite to each other, and the chip 200 is arranged on the first surface 31; wherein the second surface 32 of the circuit board is provided with an antenna structure 100, wherein at least one antenna structure 100 is the antenna structure described above, and wherein the chip 200 is used to transmit signals through the antenna structure.

[0103] Fig.10 for Fig. 9 Another structural schematic diagram of the radio frequency device 1000 is shown. Fig.10As shown, at least one radiation structure F and a plurality of solder balls Q arranged around the radiation structure F are provided on a surface of the package body 22 facing the circuit board 300, wherein the radiation structure F is connected to the bare chip 21, and the package body 22 is connected to the first surface 31 of the circuit board 300 through the solder balls Q; wherein the plurality of solder balls Q arranged around the radiation structure F constitute a second waveguide channel.

[0104] Waveguide through holes T are respectively provided on the circuit board 300 at locations corresponding to the radiation structures F. The waveguide through holes T are provided in a one-to-one correspondence with the waveguide openings K on the antenna structure 100 for signal transmission.

[0105] The waveguide through hole T of the circuit board 300 and the waveguide port K of the antenna structure 100 are used to connect the first waveguide channel of the antenna structure 100 with the second waveguide channel D2 of the package body 100, thereby realizing signal transmission.

[0106] When the antenna structure 100 has a waveguide opening 11, the chip 200 is provided with a signal transmission channel S corresponding to a waveguide opening 11 of the antenna structure 100, one end of the signal transmission channel S is electrically connected to the chip 200, and the other end is connected to the waveguide opening 11 in the antenna structure 100.

[0107] When the antenna structure 100 has multiple waveguide openings 11, the chip 200 is provided with a signal transmission channel S corresponding to each waveguide opening 11 one by one, wherein one end of each signal transmission channel S is electrically connected to the chip 200, and the other end is connected to the corresponding waveguide opening 11 in the antenna structure 100.

[0108] Fig.11 for Fig. 9 FIG. 1 is another schematic diagram of the structure of the radio frequency device 1000. Fig.11 As shown, Fig.10 for Fig. 9 Another structural schematic diagram of the radio frequency device 1000 is shown. Fig.10 As shown, two radiation structures F are provided on a surface of the package body 22 facing the circuit board 300, and a plurality of solder balls Q are arranged around each of the radiation structures F, wherein the radiation structure F is connected to the bare die 21, and the package body 22 is connected to the first surface 31 of the circuit board 300 through the solder balls Q;

[0109] Waveguide through holes T are respectively provided on the circuit board 300 at locations corresponding to the radiation structures F. The waveguide through holes T are provided in a one-to-one correspondence with the waveguide openings K on the antenna structure 100 for signal transmission.

[0110] exist Fig.11In the structure shown, the package body 22 has a first radiation structure F1 and a second radiation structure F2, wherein a plurality of solder balls Q are arranged around the first radiation structure F1 and the second radiation structure F2, and a first waveguide through hole T1 and a second waveguide through hole T2 corresponding to the first radiation structure F1 are arranged on the circuit board 300, wherein the first waveguide through hole T1 has a corresponding first waveguide opening K1, wherein the first waveguide opening K1 corresponds to a first waveguide channel D11 connected to three antenna radiation structures (a first antenna radiation portion A1, a second antenna radiation portion A2 and a third antenna radiation portion A3); the first waveguide through hole T2 has a corresponding first waveguide opening K2, wherein the second waveguide opening K2 corresponds to a first waveguide channel D12 connected to two antenna radiation structures (a fourth antenna radiation portion A4 and a fifth antenna radiation portion A5).

[0111] Correspondingly, the chip 200 is provided with a first signal transmission channel S1 corresponding to the first waveguide port K1 and a second signal transmission channel S2 corresponding to the second waveguide port K2.

[0112] Fig.12 for Fig. 9 FIG. 1 is another schematic diagram of the structure of the radio frequency device 1000. Fig.12 As shown, the antenna structure 100 has a first waveguide port K1 and a second waveguide port K2. Correspondingly, the chip 200 is provided with a first signal transmission channel S1 corresponding to the first waveguide port K1 and a second signal transmission channel S2 corresponding to the second waveguide port K2.

[0113] Fig.12 The structure shown is Fig.11 The structures are similar, except that the connected antenna structures 100 are different, one is that the two waveguide ports share the same curved surface, and the other is that the two waveguide ports have their own corresponding curved surfaces.

[0114] Fig.13 for Fig. 9 The schematic diagram of the structure of the chip 200 is shown. Fig.13 As shown, a radiation structure F and a group of solder balls arranged around the radiation structure are arranged on the surface of the package body 22 opposite to the circuit board 300, wherein the radiation structure F is electrically connected to the bare chip 21 for transmitting signals;

[0115] The signal transmission channel at least includes the radiation structure and a channel formed by a group of solder balls, and is used to realize signal transmission between the radiation structure F and the waveguide port.

[0116] In an exemplary embodiment, the signal transmission channel includes a first channel S1 and a second channel S2, wherein:

[0117] One end of the first channel S1 is electrically connected to the bare chip 21, and the other end is electrically connected to the radiation structure F, so as to realize signal transmission between the bare chip 21 and the radiation structure F;

[0118] The second channel S2 at least includes the radiation structure F and a channel formed by a group of solder balls, and is used to realize signal transmission between the radiation structure F and the waveguide port 11 .

[0119] The antenna structure 100 provided in the embodiment of the present application utilizes the antenna radiating portion 21 deployed on the curved surface Q to transmit the signal of the chip 200 through the antenna radiating portion 21, so that the signal can be transmitted in more radiation directions, which facilitates the antenna array and improves the radiation performance of the antenna structure 100 for the signal.

[0120] The embodiment of the present application further provides a millimeter wave radar, which is provided with the radio frequency device 100 described above.

[0121] The millimeter wave radar transmits a radio frequency signal through the radio frequency device 100, and receives an echo signal corresponding to the transmitted signal through the radio frequency device to realize detection of the environmental space.

[0122] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

Claims

1. An antenna structure, characterized in that: The antenna structure has a proximal side and a distal side of the antenna, and at least one waveguide port for connecting signals is arranged on the proximal side of the antenna; the distal side of the antenna has a curved surface, and at least one antenna radiating portion for transmitting signals to the ambient space or receiving signals from the ambient space is arranged on the curved surface; a waveguide channel is arranged inside the antenna structure, and each of the waveguide ports is connected to at least one antenna radiating portion through the waveguide channel.

2. The antenna structure according to claim 1, characterized in that: The antenna proximal side having a waveguide opening corresponds to the antenna distal side having a curved surface; or, The antenna having multiple waveguide ports has a curved surface at the far side of the antenna corresponding to the near side, wherein the antenna radiating parts connected to each waveguide port are all located on the curved surface; or, The antenna having multiple waveguide openings has multiple curved surfaces corresponding to the waveguide openings on the far side of the proximal side, wherein the antenna radiating parts connected to the same waveguide opening are located on the same curved surface.

3. The antenna structure according to claim 1, characterized in that: At least two antenna radiating parts are connected to the waveguide channel, and a signal from the same waveguide port is transmitted through each antenna radiating part, or a signal received by each antenna radiating part is transmitted through the same waveguide port.

4. The antenna structure according to claim 3, characterized in that: The waveguide channel is provided with a power divider structure, which is used to split one signal from the same waveguide port into at least two signals corresponding to at least two antenna radiating parts; or, to integrate the signals received by each antenna radiating part of the at least two antenna radiating parts corresponding to the same waveguide port into one signal.

5. The antenna structure according to claim 4, characterized in that: The waveguide channel includes branch channels corresponding to each antenna radiating portion, wherein some of the branch channels are channels shared by at least some of the antenna radiating portions, and the shared channels constitute the power divider structure.

6. The antenna structure according to claim 1, characterized in that: The radiation directions of at least two antenna radiating parts connected to the same waveguide channel are different from each other.

7. The antenna structure according to claim 1, characterized in that: The antenna radiating part is a waveguide slot antenna, a patch antenna, or a cavity aperture antenna.

8. A radio frequency device, characterized in that: It comprises a chip and a circuit board, wherein the chip comprises a bare die and a package body for packaging the bare die, the circuit board has a first surface and a second surface arranged opposite to each other, and the chip is arranged on the first surface; wherein an antenna structure is arranged on the second surface of the circuit board, wherein at least one antenna structure is an antenna structure as described in any one of claims 1 to 7, and wherein the chip transmits signals through the antenna structure.

9. The radio frequency device according to claim 8, characterized in that: At least one radiating structure and a plurality of solder balls arranged around each of the radiating structures are provided on a side of the package body facing the circuit board, wherein the radiating structure is connected to the bare chip, and the package body is connected to the first side of the circuit board through the solder balls; Waveguide through holes are respectively arranged on the circuit board at locations corresponding to the radiation structures, and the waveguide through holes are arranged in a one-to-one correspondence with the waveguide openings on the antenna structure for signal transmission.

10. A millimeter wave radar, characterized in that: Comprising the radio frequency device as claimed in claim 8 or 9.

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