A design method of a vehicle-mounted antenna, a vehicle-mounted antenna and a vehicle

Abstract

The present disclosure provides a design method of a vehicle-mounted antenna, a vehicle-mounted antenna and a vehicle. The design method of the vehicle-mounted antenna comprises: obtaining a working frequency of the vehicle-mounted antenna; obtaining current distribution of a plurality of metal regions of a vehicle body at the working frequency; selecting a metal region with a current peak point as a radiation region according to the current distribution; selecting at least one radiation region as a radiator of the vehicle-mounted antenna; and setting a feed point of the vehicle-mounted antenna near the current peak point of the radiator, so that when the feed point is connected to a feed signal, the radiator radiates electromagnetic waves at the working frequency. In the design method of the vehicle-mounted antenna, the vehicle-mounted antenna and the vehicle provided by the present disclosure, the position of the vehicle-mounted antenna is selected with more reliable theoretical support, which effectively reduces the design difficulty of the vehicle-mounted antenna while ensuring high performance of the vehicle-mounted antenna.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of antennas, in particular to a design method of a vehicle-mounted antenna, a vehicle-mounted antenna and a vehicle. BACKGROUND

[0002] At present, most vehicle-mounted antennas are designed separately from the vehicle body, that is, the design of the antenna is completed first, and then the antenna is placed on the vehicle body. However, the vehicle body includes many metal regions, which causes the radiation characteristics of the antenna to be easily affected by the metal regions after the antenna is installed on the vehicle body, resulting in that the design of the vehicle-mounted antenna is difficult and the performance of the vehicle-mounted antenna is not high. SUMMARY

[0003] The present disclosure aims to at least partially solve one of the technical problems in the related art.

[0004] To this end, the purpose of the present disclosure is to provide a design method of a vehicle-mounted antenna, a vehicle-mounted antenna and a vehicle.

[0005] To achieve the above purpose, the first aspect of the present disclosure provides a design method of a vehicle-mounted antenna, comprising: obtaining a working frequency of the vehicle-mounted antenna; obtaining current distributions of a plurality of metal regions of a vehicle body at the working frequency; selecting the metal region with a current peak point as a radiation region according to the current distributions; selecting at least one radiation region as a radiator of the vehicle-mounted antenna; and setting a feed point of the vehicle-mounted antenna near the current peak point of the radiator, so that when the feed point is connected to a feed signal, the radiator radiates electromagnetic waves of the working frequency.

[0006] Optionally, the obtaining of the current distributions of the plurality of metal regions at the working frequency comprises: calculating the current distributions of the plurality of metal regions at the working frequency according to a characteristic mode theory.

[0007] Optionally, the calculation of the current distributions of the plurality of metal regions at the working frequency according to the characteristic mode theory comprises: establishing simulation models of the plurality of metal regions in simulation software; and inputting the working frequency of the vehicle-mounted antenna in the simulation software, so that the simulation software calculates the current distributions on the plurality of metal regions according to the characteristic mode theory and displays the current distributions on the simulation models of the plurality of metal regions.

[0008] Optionally, the selection of at least one radiation region as the radiator of the vehicle-mounted antenna comprises: calculating mode weight coefficients of the plurality of radiation regions at the working frequency according to the characteristic mode theory; and selecting the radiation region with the highest mode weight coefficient as the radiator of the vehicle-mounted antenna.

[0009] Optionally, the method further comprises: obtaining a current value of the current peak point on the radiator according to the current distribution; multiplying the current value of the current peak point by a coefficient to obtain a current value of the feed point, wherein the coefficient is less than 1; and obtaining a position of the feed point on the radiator according to the current distribution and the current value of the feed point.

[0010] Optionally, the coefficient is 0.4-0.6.

[0011] The second aspect of the present disclosure provides a vehicle-mounted antenna, comprising: a vehicle body, the vehicle body comprising: a plurality of metal regions, wherein, according to a current distribution of a plurality of the metal regions at a working frequency of the vehicle-mounted antenna, the metal region with a current peak point is taken as a radiation region, and at least one of the radiation regions is taken as a radiator of the vehicle-mounted antenna; and a feed point, the feed point being arranged at the radiator close to the current peak point, when the feed point accesses a feed signal, the radiator radiates electromagnetic waves of the working frequency.

[0012] Optionally, the radiator comprises: a first frame; a second frame, one end of the second frame being connected to one end of the first frame; a third frame, one end of the third frame being connected to the other end of the second frame; and a fourth frame, one end of the fourth frame being connected to the other end of the third frame, and the other end of the fourth frame being connected to the other end of the first frame; wherein the first frame, the second frame, the third frame and the fourth frame form a window therebetween.

[0013] Optionally, the first frame and the fourth frame have the current peak point at the connected position; the feed point is arranged at the first frame close to one end of the second frame; or the feed point is arranged at the fourth frame close to one end of the third frame.

[0014] Optionally, the second frame and the third frame have the current peak point at the connected position; the feed point is arranged at the second frame close to one end of the first frame; or the feed point is arranged at the third frame close to one end of the fourth frame.

[0015] The third aspect of the present disclosure provides a vehicle, comprising: the vehicle-mounted antenna provided in the second aspect of the present disclosure.

[0016] The technical solution provided by the present disclosure can have the following beneficial effects:

[0017] At different working frequencies, the vehicle body has different current distributions, and a metal region corresponding to the working frequency is selected as a radiator according to the current distribution, so that when a corresponding feed signal is sent to the radiator at the feed point, electromagnetic wave radiation of the corresponding working frequency is realized, thereby making the position selection of the vehicle-mounted antenna have more reliable theoretical support, while ensuring high performance of the vehicle-mounted antenna, the design difficulty of the vehicle-mounted antenna is effectively reduced.

[0018] The metal region of the vehicle body is used for electromagnetic wave radiation, which ensures the performance of the vehicle-mounted antenna without the need to set up additional vehicle-mounted antenna structures, realizes the entity-free design of the vehicle-mounted antenna, effectively reduces the design difficulty and cost; the large area of the metal region of the vehicle body is beneficial to improve the radiation efficiency and gain of the vehicle-mounted antenna, ensure the high performance of the vehicle-mounted antenna, and make the vehicle-mounted antenna have a wide frequency range; the radiation characteristics of the vehicle-mounted antenna can change with the change of the vehicle body structure, so that a vehicle-mounted antenna meeting various different bandwidths and frequency bands can be designed based on the characteristics of the vehicle body, the vehicle can adapt to a larger number and types of vehicle-mounted antennas, has strong versatility and effectively reduces the design difficulty of the vehicle-mounted antenna; the metal region of the vehicle body is used as a radiator, which does not affect the appearance and layout of the vehicle body, and is easy for the industrial design of the vehicle body; the metal region of the vehicle body as a radiator can be away from the electronic and electrical components of the vehicle, reducing the electromagnetic compatibility risk of the vehicle-mounted antenna and the vehicle.

[0019] Additional aspects and advantages of the present disclosure will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present disclosure will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1 is a flowchart of a design method of a vehicle-mounted antenna according to an embodiment of the present disclosure;

[0022] Figure 2 is a structural diagram of a vehicle-mounted antenna according to an embodiment of the present disclosure;

[0023] Figure 3 is a curve diagram in a vehicle-mounted antenna according to an embodiment of the present disclosure;

[0024] Figure 4 is a current simulation diagram in a vehicle-mounted antenna according to an embodiment of the present disclosure;

[0025] Figure 5 is a structural diagram of a vehicle-mounted antenna according to an embodiment of the present disclosure;

[0026] Figure 6is a structural schematic diagram of a vehicle-mounted antenna according to an embodiment of the present disclosure;

[0027] Figure 7 is a structural schematic diagram of a vehicle-mounted antenna according to an embodiment of the present disclosure;

[0028] Figure 8 is a structural schematic diagram of a vehicle-mounted antenna according to an embodiment of the present disclosure;

[0029] Figure 9 is a structural schematic diagram of a vehicle-mounted antenna according to an embodiment of the present disclosure;

[0030] Figure 10 is a structural schematic diagram of a vehicle-mounted antenna according to an embodiment of the present disclosure;

[0031] As shown in the figure: 1, vehicle body, 2, metal area, 3, feed point, 4, current peak point, 5, first frame, 6, second frame, 7, third frame, 8, fourth frame. DETAILED DESCRIPTION

[0032] The embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present disclosure, and cannot be understood as a limitation of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0033] In related embodiments, a vehicle-mounted antenna is an antenna in the form of a wire bending, which is applied to low frequency, and can be arranged at a position such as a vehicle window glass, and another is a vehicle-mounted antenna in the form of a shark fin, which is applied to a higher frequency band such as mobile communication and positioning.

[0034] On the one hand, both of the two vehicle-mounted antennas are designed separately from the vehicle body, that is, the design of the antenna is completed first, and then the antenna is placed on the vehicle body, but the vehicle body includes a large number of metal areas, which causes the radiation characteristics of the antenna to be easily affected by the metal areas after the antenna is installed on the vehicle body, and the radiation characteristics of the vehicle-mounted antenna need to be re-evaluated, resulting in a large design difficulty of the vehicle-mounted antenna, and the performance of the vehicle-mounted antenna is not high.

[0035] On the other hand, in order to ensure the radiation performance of the vehicle-mounted antenna, both of the two vehicle-mounted antennas need to be arranged at a relatively open area on the vehicle body, for example, the roof, the spoiler, the rear windshield and the like, but the selection of these positions is based on experience and has no specific theoretical support, and with the increase of the types of vehicle-mounted antennas, the positions based on experience cannot meet the layout requirements of the vehicle-mounted antennas, resulting in a low performance of the vehicle-mounted antennas.

[0036] As Figure 1 And Figure 2 The embodiment of the present disclosure proposes a design method of a vehicle-mounted antenna, comprising:

[0037] S100: obtaining the working frequency of the vehicle-mounted antenna;

[0038] S200: obtaining the current distribution of the plurality of metal regions 2 of the vehicle body 1 at the working frequency;

[0039] S300: selecting the metal region 2 with the current peak point 4 as the radiation region according to the current distribution;

[0040] S400: selecting at least one radiation region as the radiator of the vehicle-mounted antenna;

[0041] S500: setting the feed point 3 of the vehicle-mounted antenna near the current peak point 4 of the radiator, so that when the feed point 3 is connected to the feed signal, the radiator radiates electromagnetic waves at the working frequency.

[0042] It can be understood that at different working frequencies, the vehicle body 1 has different current distributions, and the metal region 2 corresponding to the working frequency is selected as the radiator according to the current distribution, so that when the feed point 3 sends the corresponding feed signal to the radiator, the electromagnetic wave at the corresponding working frequency is radiated, thereby making the position selection of the vehicle-mounted antenna have more reliable theoretical support, while ensuring the high performance of the vehicle-mounted antenna, effectively reducing the design difficulty of the vehicle-mounted antenna.

[0043] Among them, the metal region 2 of the vehicle body 1 is used for electromagnetic wave radiation, which ensures the performance of the vehicle-mounted antenna without the need to set up additional vehicle-mounted antenna structure, realizes the entity-free design of the vehicle-mounted antenna, and effectively reduces the design difficulty and cost.

[0044] By taking advantage of the larger area of the metal region 2 of the vehicle body 1, not only the radiation efficiency and gain of the vehicle-mounted antenna can be improved to ensure the high performance of the vehicle-mounted antenna, but also the vehicle-mounted antenna has a wider frequency range.

[0045] The radiation characteristics of the vehicle-mounted antenna can change with the change of the structure of the vehicle body 1, so based on the characteristics of the vehicle body 1, a vehicle-mounted antenna that meets a variety of different bandwidths and frequency bands can be designed, making the vehicle adapt to a larger number and type of vehicle-mounted antennas, and effectively reducing the design difficulty of the vehicle-mounted antenna.

[0046] The vehicle-mounted antenna uses the metal region 2 of the vehicle body 1 as the radiator, which does not affect the appearance and layout of the vehicle body 1, and is easy to design the industrial design of the vehicle body 1.

[0047] The metal area 2 of the vehicle body 1 can act as a radiator, keeping it away from the vehicle's electronic and electrical components, thus reducing the electromagnetic compatibility (EMC) risks of the vehicle's antenna and the vehicle itself.

[0048] It should be noted that since the multiple metal areas 2 of the vehicle body 1 are of different sizes and have a large size range, different operating frequencies of vehicle antennas can be set on the vehicle body 1 according to the different sizes of the metal areas 2 and the current distribution on the metal areas 2, such as broadcast frequency, millimeter wave frequency, etc.

[0049] At a specific operating frequency, metal region 2 exhibits a corresponding current distribution. The current varies linearly along the structure of metal region 2, with the maximum current point being the current peak point 4 and the minimum current point being the current valley point. Figure 2 As shown, the darker colored area is where current peak point 4 is located.

[0050] When selecting a radiator, you can choose one radiating area as the radiator of the vehicle antenna, or you can choose multiple radiating areas as the radiators of the vehicle antenna.

[0051] Different metal regions 2 correspond to different operating frequencies. At different operating frequencies, a feed signal needs to be sent from a feed source corresponding to the operating frequency, and the feed signal needs to be tuned and matched by a matching circuit corresponding to the operating frequency.

[0052] Metal area 2 is an independent metal body on the vehicle body 1. Metal area 2 can be a door, roof, etc. of the vehicle body 1.

[0053] In some embodiments, S200, obtaining the current distribution of the plurality of metal regions 2 at the operating frequency includes:

[0054] S201: Calculate the current distribution of multiple metal regions 2 at the operating frequency based on the characteristic mode theory.

[0055] Understandably, the eigenmode theory not only retains the clear conceptual advantage of the analytical eigenmode theory, but also combines the advantages of the method of moments (MOM) in handling irregular structures. Through the eigenmode theory, the current distribution of irregularly shaped metal regions 2 can be accurately calculated, ensuring that radiators can be accurately selected among multiple metal regions 2, effectively improving the performance of vehicle-mounted antennas and reducing the design difficulty of vehicle-mounted antennas.

[0056] It should be noted that the characteristic mode theory: the basic assumption is that the scattering or radiation mode of any object is a linear combination of modal modes, characterized by its shape, and excited to different degrees by the terminal (object as radiator) or incident field (object as scatterer). The current distribution on the target object is assumed to be decomposed into an infinite number of modal currents, each of which radiates a characteristic modal mode independent of all other modes. The characteristic mode theory is derived from the electric field integral equation, which is prior art and will not be described here.

[0057] In some embodiments, in S201, calculating the current distribution on the plurality of metal regions 2 at the operating frequency according to the characteristic mode theory comprises:

[0058] S2011: establishing a simulation model of the plurality of metal regions 2 in the simulation software;

[0059] S2012: inputting the operating frequency of the vehicle-mounted antenna in the simulation software, so that the simulation software calculates the current distribution on the plurality of metal regions 2 according to the characteristic mode theory and displays the current distribution on the simulation model of the plurality of metal regions 2.

[0060] It can be understood that calculating the current distribution on the metal regions 2 using the simulation software and displaying the current distribution not only makes the calculation of the current distribution more efficient and accurate, but also enables the designer to intuitively judge the current distribution on the metal regions 2, so as to more efficiently and accurately select the radiators from the plurality of metal regions 2. Therefore, through the use of the simulation software, the design difficulty of the vehicle-mounted antenna can be effectively reduced, and the high performance of the vehicle-mounted antenna can be ensured.

[0061] It should be noted that the type of simulation software can be selected according to actual needs, and is not limited herein.

[0062] In some embodiments, in S400, selecting at least one radiation region as a radiator of the vehicle-mounted antenna comprises:

[0063] S401: calculating the mode weight coefficient of the plurality of radiation regions at the operating frequency according to the characteristic mode theory;

[0064] S402: selecting the radiation region with the highest mode weight coefficient as the radiator of the vehicle-mounted antenna.

[0065] It can be understood that at the same operating frequency, the mode weight coefficients on different metal regions 2 are different when the current distribution is calculated according to the characteristic mode theory, and the higher the mode weight coefficient, the higher the radiation efficiency and gain of the metal region 2. Therefore, selecting the radiation region with the highest mode weight coefficient as the radiator of the vehicle-mounted antenna ensures that the vehicle-mounted antenna has the best performance when it is installed on the vehicle body 1.

[0066] It should be noted that the mode weight coefficient represents the actual contribution of the nth mode current Jn to the total current under the excitation of the feed signal, which is related to the metal area 2 itself and the feed signal.

[0067] When selecting the radiator, factors such as the position of the metal area 2 on the vehicle body 1, the difficulty of transmitting the feed signal, etc. can also be considered.

[0068] As shown in FIG. 5, Figure 3 Figure 3 The abscissa in FIG. 5 is the operating frequency, and the ordinate is the mode weight coefficient. The five curves are Mode 1, Mode 2, Mode 3, Mode 4, and Mode 5, respectively. Each curve has a corresponding metal area 2. As can be seen from the figure, when the operating frequency is 82.22 MHz, the mode weight coefficient of Mode 1 is 0.96, the mode weight coefficient of Mode 2 is 0.80, the mode weight coefficient of Mode 3 is 0.10, the mode weight coefficient of Mode 4 is 0.03, and the mode weight coefficient of Mode 5 is 0. Therefore, if the operating frequency is 82.22 MHz, the metal area 2 corresponding to Mode 1 should be selected as the radiator to radiate electromagnetic waves.

[0069] In some embodiments, in S500, the feed point 3 of the vehicle antenna is arranged at the position close to the current peak point 4 of the radiator includes:

[0070] S501: obtaining the current value of the current peak point 4 on the radiator according to the current distribution;

[0071] S502: multiplying the current value of the current peak point 4 by a coefficient to obtain the current value of the feed point 3, wherein the coefficient is less than 1;

[0072] S503: obtaining the position of the feed point 3 on the radiator according to the current distribution and the current value of the feed point 3.

[0073] It can be understood that by setting the coefficient, the feed point 3 can be located between the current peak point 4 and the current valley point, thereby ensuring stable excitation of the feed signal to the radiator and enabling the radiator to efficiently radiate electromagnetic waves.

[0074] It should be noted that according to the current distribution, there can be multiple positions on the radiator with the same current value as the current value of the feed point 3, and these positions can all be used as the feed point 3 for transmitting the feed signal.

[0075] In some embodiments, the coefficient is 0.4-0.6. It can be understood that by setting the coefficient to 0.4-0.6, the feed point 3 can be located in the middle between the current peak point 4 and the current valley point, thereby further ensuring stable excitation of the feed signal to the radiator and enabling the radiator to efficiently radiate electromagnetic waves.

[0076] ​It should be noted that the specific value of the coefficient can be set according to actual needs, for example: 0.4, 0.45, 0.5, 0.6, etc.

[0077] As Figure 2 shown, the embodiment of the present disclosure also proposes a vehicle-mounted antenna, which comprises a vehicle body 1 and a feed point 3 (not shown in the figure), the vehicle body 1 comprises a plurality of metal regions 2, wherein, according to the current distribution of the plurality of metal regions 2 at the working frequency of the vehicle-mounted antenna, the metal region 2 with the current peak point 4 is selected as the radiation region, and at least one radiation region is selected as the radiator of the vehicle-mounted antenna, the feed point 3 is arranged at the position close to the current peak point 4 of the radiator, and when the feed point 3 is connected to the feed signal, the radiator radiates electromagnetic waves at the working frequency.

[0078] It can be understood that at different working frequencies, the vehicle body 1 has different current distributions, and the metal region 2 corresponding to the working frequency is selected as the radiator according to the current distribution, so that when the feed point 3 sends the corresponding feed signal to the radiator, electromagnetic waves at the corresponding working frequency are radiated, thereby making the position selection of the vehicle-mounted antenna have more reliable theoretical support, which effectively reduces the design difficulty of the vehicle-mounted antenna while ensuring the high performance of the vehicle-mounted antenna.

[0079] Among them, the metal region 2 of the vehicle body 1 is used for electromagnetic wave radiation, which not only ensures the performance of the vehicle-mounted antenna, but also realizes the entity-free design of the vehicle-mounted antenna without setting additional vehicle-mounted antenna structure, thereby effectively reducing the design difficulty and cost.

[0080] By using the larger area of the metal region 2 of the vehicle body 1, not only the radiation efficiency and gain of the vehicle-mounted antenna can be improved to ensure the high performance of the vehicle-mounted antenna, but also the vehicle-mounted antenna has a wider frequency range.

[0081] The radiation characteristics of the vehicle-mounted antenna can change with the change of the structure of the vehicle body 1, so based on the characteristics of the vehicle body 1, a vehicle-mounted antenna meeting various different bandwidths and frequency bands can be designed, so that the vehicle can adapt to a larger number and type of vehicle-mounted antennas, and the design difficulty of the vehicle-mounted antenna is effectively reduced.

[0082] The vehicle-mounted antenna uses the metal region 2 of the vehicle body 1 as the radiator, which does not affect the appearance and layout of the vehicle body 1, and is easy for the industrial design of the vehicle body 1.

[0083] The metal region 2 of the vehicle body 1 as the radiator can be far away from the electronic and electrical components of the vehicle, thereby reducing the electromagnetic compatibility risk of the vehicle-mounted antenna and the vehicle.

[0084] As Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 andFigure 10 As shown in some embodiments, the radiator comprises a first frame 5, a second frame 6, a third frame 7 and a fourth frame 8, one end of the second frame 6 is connected with one end of the first frame 5, one end of the third frame 7 is connected with the other end of the second frame 6, one end of the fourth frame 8 is connected with the other end of the third frame 7, and the other end of the fourth frame 8 is connected with the other end of the first frame 5, wherein the first frame 5, the second frame 6, the third frame 7 and the fourth frame 8 form a window therebetween.

[0085] It can be understood that the radiator composed of the first frame 5, the second frame 6, the third frame 7 and the fourth frame 8 can radiate electromagnetic waves as a radiator of a speakerphone antenna or a radiator of a broadcast antenna.

[0086] At the working frequency of the speakerphone or the working frequency of the broadcast, as shown in Figure 4 The direction of the arrow in the figure represents the direction of the current, the larger the size of the arrow and the more the number of arrows, the larger the current value. As can be seen from the figure, the current value at the connection between the first frame 5 and the fourth frame 8 is the largest, and the current value at the connection between the second frame 6 and the third frame 7 is also large.

[0087] As shown in Figure 5 , when the radiator composed of the first frame 5, the second frame 6, the third frame 7 and the fourth frame 8 is used as a radiator of a speakerphone antenna; and as shown in Figure 6 , when the radiator composed of the first frame 5, the second frame 6, the third frame 7 and the fourth frame 8 is used as a radiator of a broadcast antenna.

[0088] It should be noted that the window formed between the first frame 5, the second frame 6, the third frame 7 and the fourth frame 8 can be a front and rear windshield window or a vehicle door window.

[0089] The position of the feeding point 3 is set according to the position of the current peak point 4, that is, the current value of the current peak point 4 multiplied by the coefficient is equal to the current value of the feeding point 3.

[0090] In some embodiments, the connection between the first frame 5 and the fourth frame 8 has a current peak point 4, as shown in Figure 7 , the feeding point 3 is arranged at one end of the first frame 5 close to the second frame 6, or as shown in Figure 8 , the feeding point 3 is arranged at one end of the fourth frame 8 close to the third frame 7.

[0091] It can be understood that when the current peak point 4 is at the joint of the first frame 5 and the fourth frame 8, the feed point 3 is arranged at one end of the first frame 5 close to the second frame 6 or the feed point 3 is arranged at one end of the fourth frame 8 close to the third frame 7, which can realize the feeding of the radiator composed of the first frame 5, the second frame 6, the third frame 7 and the fourth frame 8, ensure the stable excitation of the feeding signal to the radiator, and make the radiator radiate electromagnetic waves efficiently.

[0092] In some embodiments, the second frame 6 and the third frame 7 are connected at the current peak point 4, as shown in FIG. 5, the feed point 3 is arranged at one end of the second frame 6 close to the first frame 5, or as shown in FIG. 6, the feed point 3 is arranged at one end of the third frame 7 close to the fourth frame 8. Figure 9 Figure 10 In some embodiments, the second frame 6 and the third frame 7 are connected at the current peak point 4, as shown in FIG. 5, the feed point 3 is arranged at one end of the second frame 6 close to the first frame 5, or as shown in FIG. 6, the feed point 3 is arranged at one end of the third frame 7 close to the fourth frame 8.

[0093] In some embodiments, the second frame 6 and the third frame 7 are connected at the current peak point 4, as shown in FIG. 5, the feed point 3 is arranged at one end of the second frame 6 close to the first frame 5, or as shown in FIG. 6, the feed point 3 is arranged at one end of the third frame 7 close to the fourth frame 8.

[0094] As shown in FIG. 5, the feed point 3 is arranged at one end of the second frame 6 close to the first frame 5, or as shown in FIG. 6, the feed point 3 is arranged at one end of the third frame 7 close to the fourth frame 8. Figure 2 As shown in FIG. 5, the feed point 3 is arranged at one end of the second frame 6 close to the first frame 5, or as shown in FIG. 6, the feed point 3 is arranged at one end of the third frame 7 close to the fourth frame 8.

[0095] It can be understood that under different working frequencies, the vehicle body 1 has different current distributions, and the metal region 2 corresponding to the working frequency is selected as the radiator according to the current distribution, so that when the feed point 3 sends the corresponding feeding signal to the radiator, electromagnetic waves of the corresponding working frequency are radiated, thereby making the position selection of the vehicle-mounted antenna have more reliable theoretical support, effectively reducing the design difficulty of the vehicle-mounted antenna while ensuring the high performance of the vehicle-mounted antenna.

[0096] The metal region 2 of the vehicle body 1 is used for electromagnetic wave radiation, which can ensure the performance of the vehicle-mounted antenna without additional vehicle-mounted antenna structure, realize the solidification-free design of the vehicle-mounted antenna, and effectively reduce the design difficulty and cost.

[0097] The large area of the metal region 2 of the vehicle body 1 is conducive to improving the radiation efficiency and gain of the vehicle-mounted antenna, ensuring the high performance of the vehicle-mounted antenna, and making the vehicle-mounted antenna have a wide frequency range.

[0098] ​The radiation characteristics of the vehicle antenna can change with the change of the structure of the vehicle body 1, and therefore a vehicle antenna meeting various bandwidths and frequency bands can be designed based on the characteristics of the vehicle body 1, so that the vehicle can adapt to a larger number and types of vehicle antennas, has strong versatility, and effectively reduces the design difficulty of the vehicle antenna.

[0099] The vehicle antenna uses the metal region 2 of the vehicle body 1 as a radiator, does not affect the appearance and layout of the vehicle body 1, and is easy for the industrial design of the vehicle body 1.

[0100] The metal region 2 of the vehicle body 1 as a radiator can be away from the electronic and electrical components of the vehicle, reducing the electromagnetic compatibility risk of the vehicle antenna and the vehicle.

[0101] It should be noted that in the description of the present disclosure, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0102] Any process or method descriptions in flow charts or described elsewhere herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for implementing specific logic functions (or steps) in the process, and that the various embodiments of the present disclosure include additional implementations in which the order of execution can be changed, including that described acts or state changes can be performed in an order other than that described, including that state changes can be performed, at least in part, concurrently with each other, including that acts can be performed, at least in part, concurrently with each other or in reverse order, depending upon the functionality involved, as will be understood by those having ordinary skill in the art.

[0103] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0104] Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present disclosure, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A method of designing a vehicle antenna, characterized by, The method comprises: acquiring a working frequency of the vehicle-mounted antenna; acquiring current distribution of a plurality of metal regions of a vehicle body at the working frequency; selecting, according to the current distribution, the metal region with a current peak point as a radiation region; selecting at least one of the radiation regions as a radiator of the vehicle-mounted antenna; arranging a feed point of the vehicle-mounted antenna at a position close to the current peak point of the radiator, so that the radiator radiates electromagnetic waves at the working frequency when the feed point is connected to a feed signal.

2. The method of designing a vehicle antenna according to claim 1, wherein The acquiring of the current distribution of the plurality of metal regions at the working frequency comprises: calculating the current distribution of the plurality of metal regions at the working frequency according to a characteristic mode theory.

3. The method of designing a vehicle antenna according to claim 2, wherein The calculating of the current distribution of the plurality of metal regions at the working frequency according to the characteristic mode theory comprises: establishing a simulation model of the plurality of metal regions in simulation software; inputting the working frequency of the vehicle-mounted antenna in the simulation software, so that the simulation software calculates the current distribution on the plurality of metal regions according to the characteristic mode theory and displays the current distribution on the simulation model of the plurality of metal regions.

4. The method of designing a vehicle antenna according to claim 2, wherein The selecting of at least one of the radiation regions as the radiator of the vehicle-mounted antenna comprises: calculating mode weight coefficients of the plurality of radiation regions at the working frequency according to the characteristic mode theory; selecting the radiation region with the highest mode weight coefficient as the radiator of the vehicle-mounted antenna.

5. The method of designing a vehicle antenna according to any one of claims 1 to 4, wherein The arranging of the feed point of the vehicle-mounted antenna at a position close to the current peak point of the radiator comprises: acquiring a current value of the current peak point on the radiator according to the current distribution; multiplying the current value of the current peak point by a coefficient to obtain a current value of the feed point, wherein the coefficient is less than 1; acquiring a position of the feed point on the radiator according to the current distribution and the current value of the feed point.

6. The method of designing a vehicle antenna according to claim 5, wherein The coefficient is 0.4-0.

6.

7. A vehicle antenna, characterized by The vehicle-mounted antenna comprises: a vehicle body comprising a plurality of metal regions, wherein, according to current distribution of the plurality of metal regions at a working frequency of the vehicle-mounted antenna, the metal region with a current peak point is selected as a radiation region, and at least one of the radiation regions is selected as a radiator of the vehicle-mounted antenna; a feed point arranged at a position close to the current peak point of the radiator, wherein the radiator radiates electromagnetic waves at the working frequency when the feed point is connected to a feed signal.

8. The antenna according to claim 7, wherein The radiator comprises: a first frame; a second frame, one end of the second frame being connected to one end of the first frame; a third frame, one end of the third frame being connected to the other end of the second frame; a fourth frame, one end of the fourth frame being connected to the other end of the third frame, and the other end of the fourth frame being connected to the other end of the first frame; wherein a window is formed between the first frame, the second frame, the third frame and the fourth frame.

9. The vehicle-mounted antenna according to claim 8, wherein: the current peak point is located at a position where the first frame and the fourth frame are connected; the feed point is arranged at a position close to one end of the first frame and the second frame; or ​ The feeding point is arranged at an end of the fourth frame close to the third frame.

10. The vehicle antenna according to claim 8, wherein The second frame has the current peak point at a connection with the third frame; The feeding point is arranged at an end of the second frame close to the first frame; Or The feeding point is arranged at an end of the third frame close to the fourth frame.

11. A vehicle characterized by comprising: Comprising: The vehicle antenna according to any one of claims 7-10.

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