Antenna device and vehicle

Abstract

According to the antenna device and the vehicle, a first feed part is electrically connected with a non-closed first conductive ring, antenna signals of a first working frequency band can be radiated and received, and due to the fact that the first feed part is arranged to be annular, the occupied area can be reduced; besides, research finds that when the second transverse strip and the third transverse strip are arranged at intervals and are mutually coupled, the average gain of the antenna signal of the first working frequency band can be increased, the effect of improving the antenna performance of the antenna signal of the first working frequency band is achieved, and the stability is better. Besides, the gain does not need to be correspondingly increased by increasing the area of the first antenna structure, that is, the area size of the first antenna structure can be correspondingly reduced, so that the area of the demisting heating unit can be increased to improve the demisting effect.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an antenna device and a vehicle. Background Art

[0002] With the rapid development of wireless communication, people have higher and higher requirements for communication quality. At present, antennas have been widely used in automotive wireless communications, and the vehicle-mounted antenna device is an indispensable component of the vehicle wireless communication system. Its performance, size, and placement greatly affect the quality of the communication system.

[0003] In the related art, since the antenna device for receiving AM radio broadcast waves and FM radio broadcast waves requires a relatively large area to obtain a good receiving gain, the antenna device is often installed on the rear windshield of the motor vehicle. In addition, defogging heater strips are often installed in the middle area of ​​the rear windshield of the motor vehicle to ensure the rear view when driving in the rain. Therefore, when the antenna device is installed on the rear windshield, it is forced to install the antenna device in the blank area above or below the above-mentioned defogging heater strips.

[0004] However, in order to improve the defogging effect of the defogging heating line of the rear windshield, it is usually necessary to increase the layout area of ​​the defogging heating line on the rear windshield as much as possible. The larger the layout area, the larger the area of ​​the rear windshield that is heated and defogged, and at the same time, the layout area of ​​the antenna device on the rear windshield will be reduced, which will greatly reduce the average gain of the antenna device, and further reduce the stability of the antenna device. Summary of the invention

[0005] Based on this, it is necessary to overcome the defects of the prior art and provide an antenna device and a vehicle, which can improve the average gain and improve the stability.

[0006] An antenna device, comprising:

[0007] Medium body;

[0008] A demisting heating unit, the demisting heating unit is arranged in the middle part of the medium body, the demisting heating unit comprises two busbars arranged at intervals, a plurality of first transverse bars electrically connected between the two busbars and arranged at intervals in sequence, first longitudinal bars respectively connected to each of the first transverse bars, and second transverse bars connected to the first longitudinal bars;

[0009] A first feeding portion disposed on the dielectric body; and

[0010] A first antenna structure is arranged on the dielectric body, the first antenna structure comprises a non-enclosed first conductive ring, the first conductive ring comprises a third transverse strip spaced apart from and coupled to the second transverse strip, and the first conductive ring is electrically connected to the first feeding portion.

[0011] In one embodiment, a notch is formed on the first conductive ring, and the notch is located at the first end of the third transverse strip, and the first end of the third transverse strip is electrically connected to the first feeding portion.

[0012] In one embodiment, the first conductive ring further includes a second longitudinal strip connected to the second end of the third transverse strip and a first conductive line connected to the second longitudinal strip; the first conductive line is spaced apart from one end of the second longitudinal strip and the first end of the third transverse strip to form the gap.

[0013] In one embodiment, the first antenna structure further includes a second conductive line disposed on the dielectric body and located outside the first conductive ring, and the second conductive line is connected to the second longitudinal strip and / or the first conductive line.

[0014] In one embodiment, the first antenna structure further includes a third conductive wire disposed on the dielectric body and located outside the first conductive ring, one end of the third conductive wire is electrically connected to the first feeding portion, and the other end of the third conductive wire is set as a free end.

[0015] In one embodiment, the first antenna structure further includes a plurality of branch lines disposed on the dielectric body and located inside the first conductive ring, one end of the branch line is directly or indirectly electrically connected to the first conductive ring, and the other end of the branch line is a free end.

[0016] In one embodiment, the antenna device further comprises a plurality of suspension lines arranged on the dielectric body and located inside the first conductive ring, wherein the suspension lines are respectively arranged with insulation intervals from the first conductive ring and the branch lines and are coupled to each other.

[0017] In one embodiment, the first antenna structure further includes a second conductive ring which is disposed on the dielectric body and located outside the first conductive ring and is closed. The second conductive ring is electrically connected to the first conductive ring, and the length of the second conductive ring is less than the length of the first conductive ring.

[0018] In one embodiment, the first antenna structure further includes a third longitudinal strip disposed between the second conductive ring and the first conductive ring, the second conductive ring is arranged adjacent to and electrically connected to the first feeding portion, and the second conductive ring is connected to a portion of the first conductive ring close to the first feeding portion through the third longitudinal strip.

[0019] In one embodiment, the second conductive ring includes two fourth transverse strips relatively spaced apart and two fourth longitudinal strips relatively spaced apart, and the two fourth transverse strips and the two fourth longitudinal strips are sequentially connected end to end to enclose the second conductive ring.

[0020] In one embodiment, the antenna device also includes a second antenna structure arranged on the dielectric body; the second antenna structure includes a fourth conductive wire electrically connected to the first feeding part and located outside the first conductive ring, and / or a third conductive ring electrically connected to the first feeding part and located outside the first conductive ring and a fifth conductive wire connected to the third conductive ring.

[0021] In one of the embodiments, the antenna device further includes a third antenna structure disposed on the dielectric body and a second feeding portion connected to the third antenna structure; the third antenna structure and the first antenna structure are respectively located on the upper side and the lower side of the defogger heating unit.

[0022] A vehicle comprises the antenna device.

[0023] In the above-mentioned antenna device and vehicle, the first feeder is electrically connected to the non-enclosed first conductive ring, which can realize the radiation and reception of the antenna signal of the first working frequency band, and because it is set in a ring shape, the occupied area can be reduced; in addition, through research, it is found that when the second transverse strip and the third transverse strip are arranged at intervals and coupled with each other, the average gain of the antenna signal of the first working frequency band can be increased, which plays a role in improving the antenna performance of the antenna signal of the first working frequency band, and has better stability. In addition, there is no need to increase the gain by increasing the area of ​​the first antenna structure, that is, the area size of the first antenna structure can be reduced accordingly, so that the area of ​​the defogger heating unit can be increased to improve the defogger effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is a structural diagram of an antenna device according to an embodiment of the present application.

[0025] FIG. 2 is a structural diagram of the demisting heating unit in the structure shown in FIG. 1 .

[0026] FIG. 3 is a structural diagram showing the mutual coupling between the second transverse strip and the first antenna structure in the structure shown in FIG. 1 .

[0027] FIG. 4 is a structural diagram of the first antenna structure in the structure shown in FIG. 1 .

[0028] FIG. 5 is a structural diagram of the second conductive ring in the structure shown in FIG. 4 .

[0029] FIG. 6 is a structural diagram of a first antenna structure according to another embodiment of the present application.

[0030] FIG. 7 is a structural diagram of the demisting heating unit in the structure shown in FIG. 1 .

[0031] 10. dielectric body; 20. defog heating unit; 21. busbar; 22. first transverse strip; 23. first longitudinal strip; 24. second transverse strip; 25. first symmetry line; 30. first feeder; 40. first antenna structure; 41. first conductive ring; 411. third transverse strip; 412. notch; 413. second longitudinal strip; 414. first conductive line; 415. second conductive line; 416. third conductive line; 42. first branch line; 43. second branch line ; 44. third branch line; 45. suspension line; 46. second conductive ring; 461. fourth horizontal strip; 462. fourth vertical strip; 47. third vertical strip; 48. connector; 50. second antenna structure; 51. fourth conductive wire; 52. third conductive ring; 53. fifth conductive wire; 60. third antenna structure; 601. hollow area; 61. fifth horizontal strip; 62. fifth vertical strip; 70. second feeding part; 80. symmetrical line structure; 81. second symmetrical line. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] It should be noted that the frequency bands involved in the antenna device in this embodiment mainly include AM: 520KHz-1800KHz, FM: 76MHz-108MHz, and DAB: 170MHz-240MHz. The wavelength corresponding to the AM band when transmitted in glass is defined as λ1, and λ1 is set to 50m-200m; the wavelength corresponding to the FM band when transmitted in glass is defined as λ2, and λ2 is set to 1000mm-1500mm; the wavelength corresponding to the DAB band when transmitted in glass is defined as λ3, and λ3 is set to 450mm-700mm.

[0034] It should be noted that the wavelength of the antenna signal when transmitted in glass is calculated according to the following formula:

[0035] ,

[0036] Where λ is the wavelength, is the speed at which the antenna signal is transmitted in the glass, f is the frequency, C is the speed of light, is the relative dielectric constant of glass, taking 7.3 as an example (the square root is approximately 2.7), is the relative magnetic permeability of glass, which is generally 1.

[0037] It should be noted that the relative dielectric constant of the glass in the present application is not limited to 7.3; "coupled and connected" means that the two conductive elements are not directly electrically connected, but are spaced apart so that the signal is transmitted between the two conductive elements by coupling.

[0038] The present application provides an antenna device and a vehicle, in particular, an antenna device suitable for receiving VHF waves such as terrestrial digital signal broadcasts, for example, by being arranged on a car window glass. By coupling the current concentration part of the meandering structure with the extended part of the defogger heating line, the average gain of the antenna can be effectively improved to ensure the stability of the antenna, thereby reducing the footprint of the antenna, and then increasing the footprint of the defogger heating line, thereby improving the defogger effect.

[0039] Referring to FIGS. 1 to 3, an antenna device provided in an embodiment of the present application includes: a dielectric body 10, a defogger heating unit 20, a first feeder 30 and a first antenna structure 40. The defogger heating unit 20 is arranged in the middle part of the dielectric body 10, and the defogger heating unit 20 includes two busbars 21 arranged at intervals, a plurality of first transverse strips 22 electrically connected between the two busbars 21 and arranged at intervals in sequence, a first longitudinal strip 23 connected to each first transverse strip 22, and a second transverse strip 24 connected to the first longitudinal strip 23. When the two busbars 21 are respectively connected to the positive and negative poles of the power supply, the first transverse strip 22 will heat up and play a role in defogger. In addition, the first feeder 30 and the first antenna structure 40 are both arranged on the dielectric body 10. The first antenna structure 40 includes a non-enclosed first conductive ring 41, the first conductive ring 41 includes a third transverse strip 411 spaced apart from and coupled to the second transverse strip 24, and the first conductive ring 41 is electrically connected to the first feeder 30. In addition, the first feeding part 30 is connected to the amplifier by welding, for example, and the amplifier is connected to the feeder. The antenna signal is transmitted to the amplifier through the feeder, and after being amplified by the amplifier, it is fed into the first conductive ring 41 electrically connected to the first feeding part 30 through the first feeding part 30, thereby realizing outward radiation and reception of the antenna signal.

[0040] In the above antenna device, the first feeder 30 is electrically connected to the non-enclosed first conductive ring 41, which can realize the radiation and reception of the antenna signal of the first working frequency band, and because it is set in a ring shape, the occupied area can be reduced; in addition, through research, it is found that when the second transverse strip 24 and the third transverse strip 411 are spaced and coupled with each other, the average gain of the antenna signal of the first working frequency band can be increased, which plays a role in improving the antenna performance of the antenna signal of the first working frequency band, and has better stability. In addition, there is no need to increase the gain by increasing the area of ​​the first antenna structure 40, that is, the area size of the first antenna structure 40 can be reduced accordingly, so that the area of ​​the demisting heating unit 20 can be increased to improve the demisting effect.

[0041] In one embodiment, the medium body 10 can be set as a single-layer glass plate or a laminated glass. The laminated glass includes a first glass plate, an adhesive layer and a second glass plate which are sequentially laminated and connected. The first glass plate has a first surface and a second surface which are arranged opposite to each other, and the second glass plate has a third surface and a fourth surface which are arranged opposite to each other, and the second surface is arranged opposite to the third surface. The first surface faces the external environment, and the fourth surface faces the internal environment. The adhesive layer can be selected from polyvinyl butyral (PVB), polycarbonate (PC), sound insulation PVB, light shielding tape PVB, heat control PVB, ethylene vinyl acetate (EVA), thermoplastic polyurethane (TPU), ionomer, thermoplastic material, polybutylene terephthalate (PBT), polyethylene vinyl acetate (PET), polyethylene naphthalate (PEN), polyvinyl chloride (PVC), polyvinyl fluoride (PVF), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR) and a combination thereof.

[0042] Among them, the defog heating unit 20, the first feeding part 30 and the first antenna structure 40 are each independently set according to actual needs, including but not limited to being set on the first surface, the second surface, the third surface or the fourth surface, and can be arranged on the same surface of the medium body 10 or on different surfaces.

[0043] It should be noted that the number of the first transverse strips 22 includes but is not limited to two, three, four, six or more, which can be flexibly adjusted and set according to actual needs. In addition, the number of the first longitudinal strips 23 includes but is not limited to one or more. Specifically, when there is one first longitudinal strip 23, the first longitudinal strip 23 can be arranged at the center position along the transverse direction, or can be adjusted to other positions along the transverse direction, which can be flexibly adjusted and set according to actual needs. By changing the position of the first longitudinal strip 23 along the transverse direction, the overall performance of the antenna device can be adjusted accordingly; when there are multiple first longitudinal strips 23, one of the first longitudinal strips 23 is connected to the second transverse strip 24. Since the number of the first longitudinal strips 23 is large, it can improve the overall performance of the antenna device. In addition, when the first longitudinal strips 23 at different positions are selected to be connected to the second transverse strip 24, the overall performance of the antenna device changes. Therefore, the first longitudinal strip 23 at a suitable position can be flexibly selected to be connected to the second transverse strip 24 according to actual needs, so as to improve the overall performance of the antenna device. In this embodiment, the first longitudinal strip 23 is specifically arranged at the center position along the transverse direction as an example, but it is not limited to this.

[0044] In some embodiments, in order to improve the appearance of the product, the demisting heating unit 20 further includes a first symmetry line 25. The first symmetry line 25 is connected to the first longitudinal strip 23, and the first symmetry line 25 and the second transverse strip 24 are symmetrically arranged with the first longitudinal strip 23 as the symmetry axis.

[0045] It should be noted that the non-closed type in the non-closed first conductive ring 41 means that a certain point in the first conductive ring 41 is selected as the starting point, and moving from the starting point along the extension path of the first conductive ring 41 in a clockwise or counterclockwise direction cannot return to the starting point; in other words, a notch 412 is formed on the first conductive ring 41. Conversely, the closed second conductive ring 46 means that a certain point in the second conductive ring 46 is selected as the starting point, and moving from the starting point along the extension path of the second conductive ring 46 in a clockwise or counterclockwise direction can return to the starting point. Among them, the first feeding part 30 is specifically connected to one end of the first conductive ring 41 where the notch 412 is formed, so that the length of the signal transmission path between the opposite ends of the first conductive ring 41 where the notch 412 is formed is longer, and the signal transmission path corresponds to the resonant frequency point of the first working frequency band, which can reduce the overall area of ​​the first antenna structure 40 accordingly.

[0046] The first feeding portion 30 is arranged at the edge of the dielectric body 10 , so that it can be easily hidden and not observed, thereby improving the appearance of the product.

[0047] In one embodiment, the first conductive ring 41 is formed with a notch 412. The notch 412 is located at the first end of the third transverse strip 411, and the first end of the third transverse strip 411 is electrically connected to the first feeding portion 30. In this way, the antenna signal fed by the first feeding portion 30 is input from the first end of the third transverse strip 411, and is transmitted to other parts of the first antenna structure 40 through the third transverse strip 411, that is, the third transverse strip 411 is a part of the first conductive ring 41 where the current signal is relatively concentrated, and the current signal is relatively strong, so that when coupled with the second transverse strip 24, the overall performance of the antenna device can be better improved.

[0048] In one embodiment, the first conductive ring 41 further includes a second longitudinal strip 413 connected to the second end of the third transverse strip 411 and a first conductive line 414 connected to the second longitudinal strip 413. The first conductive line 414 is spaced apart from one end of the second longitudinal strip 413 and the first end of the third transverse strip 411 to form a gap 412. Thus, the first conductive ring 41 includes the third transverse strip 411, the second longitudinal strip 413 and the first conductive line 414 connected in sequence, and the length of the first conductive ring 41 is the sum of the respective lengths of the third transverse strip 411, the second longitudinal strip 413 and the first conductive line 414. In addition, by adjusting the length of the first conductive ring 41, the bandwidth of the first working frequency band can be adjusted and improved accordingly.

[0049] Among them, the length of the gap 412 along the current transmission direction of the first conductive ring 41, that is, the distance between the first end of the third transverse strip 411 and the end of the first conductive line 414 away from the second longitudinal strip 413, includes but is not limited to 2mm to 5mm, specifically for example 2mm, 2.5mm, 3mm, 4mm or 5mm, etc. In this way, on the one hand, the length of the gap 412 is relatively large to avoid short-circuit defects when it is smaller, and on the other hand, the length of the gap 412 is not too large to reduce the appearance performance.

[0050] It should be noted that, in order to facilitate the distinction between the third transverse strip 411, the second longitudinal strip 413 and the first conductive line 414, solid dots are added at the intersection of the third transverse strip 411 and the second longitudinal strip 413, and at the intersection of the second longitudinal strip 413 and the first conductive line 414 in FIG. 2 to indicate the positions, and the solid dots should not be understood as specific structural parts set on the glass body.

[0051] In some embodiments, the first conductive line 414 includes but is not limited to an L shape or other irregular shapes, as long as one end is connected to the second longitudinal strip 413, and the other end extends to the vicinity of the first end of the third transverse strip 411 and is spaced from the first end of the third transverse strip 411 to form a gap 412. In this embodiment, when the first conductive line 414 is set in an L shape, not only can the overall shape be more beautiful, but also space can be left inside the first conductive ring 41 to arrange other conductive lines such as branch lines and suspension lines 45 to improve the overall performance of the antenna device. Other conductive lines will be described in detail later.

[0052] Please refer to FIG. 3 . In one embodiment, the first antenna structure 40 further includes a second conductive line 415 disposed on the dielectric body 10 and located outside the first conductive ring 41. The second conductive line 415 is connected to the second longitudinal strip 413 and / or the first conductive line 414. In this way, the antenna signal fed by the first end of the third transverse strip 411 can also be radiated outward through the transmission path formed by the third transverse strip 411, the second longitudinal strip 413 and the second conductive line 415, which is equivalent to adding a resonant frequency point, thereby playing a role in expanding the bandwidth of the first working frequency band, improving the coverage effect of the antenna device, and improving the overall performance of the antenna device.

[0053] In some embodiments, the first working frequency band includes but is not limited to the AM frequency band, the FM frequency band or the DAB frequency band, etc. In this embodiment, the first working frequency band is specifically taken as the FM frequency band as an example, but it is not limited thereto. When the first working frequency band is the FM frequency band, the length of the first conductive ring 41 includes but is not limited to 600 mm to 1400 mm, which is between λ2 / 4 and 3λ2 / 2, so as to meet the full frequency band coverage of the FM frequency band.

[0054] In one embodiment, the first antenna structure 40 also includes a third conductive wire 416 disposed on the dielectric body 10 and located outside the first conductive ring 41. One end of the third conductive wire 416 is electrically connected to the first feeder 30, and the other end of the third conductive wire 416 is set as a free end. Specifically, when the first working frequency band is the FM band, the length of the third conductive wire 416 includes but is not limited to 400mm to 460mm, between λ2 / 4 and λ2 / 2, so as to meet the full frequency band coverage of the FM band. The first feeder 30 can feed a signal from one end of the third conductive wire 416, and radiate it outward through the third conductive wire 416, which is equivalent to adding a resonant frequency point, thereby expanding the bandwidth of the first working frequency band, improving the coverage effect of the antenna device, and improving the overall performance of the antenna device. Specifically, the third conductive wire 416 is adapted to the shape of the first conductive wire 414, and is arranged in parallel and spaced relation with the first conductive wire 414. Such a reasonable arrangement can reduce the area of ​​the first antenna structure 40.

[0055] Please refer to Figures 1 and 4. In one embodiment, the first antenna structure 40 also includes a plurality of branch lines arranged on the dielectric body 10 and located inside the first conductive ring 41. One end of the branch line is directly or indirectly electrically connected to the first conductive ring 41, and the other end of the branch line is a free end. Specifically, the lengths of the various branch lines are consistent, can be different from each other, or can be partially the same, and can be flexibly adjusted and set according to actual needs. In this way, after the plurality of branch lines are connected to the first feeding part 30 through the first conductive ring 41, a plurality of transmission paths can be formed from the first feeding part 30 to the free ends of the plurality of branch lines, that is, a plurality of resonant frequency points are formed, and the lengths of the plurality of transmission paths are between λ2 / 4, λ2 / 2, 3λ2 / 4, λ2, 5λ2 / 4 or 3λ2 / 2, and the antenna performance of the first working frequency band is supplemented without changing the shape structure and size of the first conductive ring 41, so as to achieve a better coverage effect of the first working frequency band. In addition, the current can be concentrated on the third transverse strip 411, so that the coupling effect between the second transverse strip 24 and the third transverse strip 411 is good, which can increase the average gain of the antenna signal in the first working frequency band, thereby improving the antenna performance of the antenna signal in the first working frequency band and improving the stability.

[0056] It should be noted that the other end of the branch line is a free end, which means that the other end of the branch line is not connected to any other conductive structure.

[0057] In some embodiments, the branch line includes, but is not limited to, a conductive line parallel to the third transverse strip 411, a conductive line perpendicular to the third transverse strip 411, or a combination structure of a conductive line parallel to the third transverse strip 411 and a conductive line perpendicular to the third transverse strip 411, etc. Specifically, the branch line includes a first branch line 42, the first branch line 42 is set as a conductive line perpendicular to the third transverse strip 411, and the first branch line 42 is connected to the third transverse strip 411. In this way, the first branch line 42 can improve the horizontal polarization of the antenna signal of the first working frequency band. In addition, the branch line includes a second branch line 43, the second branch line 43 is set as a conductive line parallel to the third transverse strip 411, and the second branch line 43 is specifically connected to the first branch line 42, thereby indirectly connected to the third transverse strip 411. In this way, the second branch line 43 can improve the vertical polarization of the antenna signal of the first working frequency band. Of course, the second branch line 43 can also be connected to the second longitudinal strip 413, and can also be connected to the third transverse strip 411, so that the first feed portion 30 and the free end of the second branch line 43 form a current transmission path. In addition, the branch line includes a third branch line 44, and the third branch line 44 includes both a conductive line parallel to the third transverse strip 411 and a conductive line perpendicular to the third transverse strip 411, and the conductive line parallel to the third transverse strip 411 and the conductive line perpendicular to the third transverse strip 411 are connected to each other. Specifically, the third branch line 44 is set to a T shape or an L shape, so that the horizontal polarization and vertical polarization of the antenna signal in the first working frequency band can be improved respectively.

[0058] Optionally, the number of the first branch line 42 , the second branch line 43 and the third branch line 44 can be flexibly adjusted and set according to actual needs, and is not limited here.

[0059] In some embodiments, the length of the first branch line 42 is, for example, 140 mm to 160 mm, specifically 140 mm, 150 mm or 160 mm; the length of the second branch line 43 refers to the path length from the free end of the second branch line 43 to the intersection of the second branch line 43 and the first branch line 42, including but not limited to 360 mm to 400 mm, specifically 360 mm, 380 mm or 400 mm; the length of the transverse segment of the third branch line 44 is, for example, 90 mm to 100 mm, specifically 90 mm, 95 mm or 100 mm. In this way, on the basis that the length of the first conductive ring 41 is between λ2 / 4 and λ2 / 2 of the wavelength of the FM band in the glass (λ2≈1000mm-1500mm), the lengths of the multiple transmission paths formed by the multiple branch lines extending from the first conductive ring 41 are between λ2 / 4, λ2 / 2, 3λ2 / 4, λ2, 5λ2 / 4 or 3λ2 / 2, thereby supplementing the antenna performance of the FM band without changing the appearance structure and size of the first conductive ring 41.

[0060] In one embodiment, the antenna device further includes a plurality of suspension lines 45 disposed on the dielectric body 10 and located inside the first conductive ring 41. The suspension lines 45 are respectively arranged with insulation intervals from the first conductive ring 41 and the branch lines and are coupled to each other. In this way, a plurality of branch lines and a plurality of suspension lines 45 are arranged in combination inside the first conductive ring 41, and since the suspension lines 45 are respectively arranged with insulation intervals from the first conductive ring 41 and the branch lines and are coupled to each other, after a large number of simulations, it is found that the antenna signal can not only cover the first working frequency band, but also cover the second working frequency band. Among them, the first working frequency band is the FM frequency band, and the second working frequency band is the DAB frequency band, and then the FM frequency band and the DAB frequency band are integrated into one, which has a better broadcast signal reception function and can reduce the occupied area of ​​the overall antenna.

[0061] In some embodiments, the first conductive ring 41 cooperates with the multiple branch lines and the multiple suspension lines 45 located inside it to form a grid line, making the structure more beautiful and ensuring the symmetry of the overall structure. The suspension lines 45 can be set in a variety of structural forms, such as being set as conductive lines perpendicular to the third transverse bar 411; another example is set as conductive lines parallel to the third transverse bar 411; another example is a combination of conductive lines perpendicular to the third transverse bar 411 and conductive lines parallel to the third transverse bar 411, such as a cross shape, a T shape, an L shape or a tic-tac-toe shape, etc.

[0062] It should be noted that the "suspended" in the suspended wire 45 means that the conductive wire is insulated from the first conductive ring 41 and the branch wire respectively, for example, an insulating distance is left between the first conductive ring 41 and the branch wire respectively, and the formed insulating distance includes but is not limited to 2mm to 5mm.

[0063] Among them, when the length, shape and number of the suspension line 45 are adjusted, the respective performances of the FM frequency band and the DAB frequency band can be adjusted accordingly, especially the performance of the DAB frequency band can be improved; similarly, when the length, shape and number of the branch line are adjusted, the respective performances of the FM frequency band and the DAB frequency band can be adjusted accordingly.

[0064] Please refer to FIG. 4 and FIG. 5 or FIG. 6. On the basis of the above-mentioned embodiment, the first antenna structure 40 also includes a second conductive ring 46 which is arranged on the dielectric body 10 and is located outside the first conductive ring 41 and is closed. The second conductive ring 46 is electrically connected to the first conductive ring 41, and the length of the second conductive ring 46 is less than the length of the first conductive ring 41. In this way, under the action of the second conductive ring 46, it has the effect of expanding the DAB bandwidth and reducing the DAB band gain flatness. Among them, the length of the second conductive ring 46 also refers to the circumference of the second conductive ring 46, for example, ≤λ3 / 4, so as to ensure the overall performance of the FM / DAB antenna. In addition, it can be known from simulation experiments that when the length of the second conductive ring 46 is greater than 140mm, the overall frequency response of the FM / DAB antenna will change abnormally.

[0065] It should be noted that the performance of the DAB antenna can be improved by adjusting the arrangement position of the second conductive ring 46 along the extension path of the first conductive ring 41. Specifically, the closer the second conductive ring 46 is to the first feeder 30, the more obvious the improvement effect of the DAB antenna performance is.

[0066] Referring to FIG. 4 and FIG. 5 , in a specific embodiment, the first antenna structure 40 further includes a third longitudinal strip 47 disposed between the second conductive ring 46 and the first conductive ring 41. The second conductive ring 46 is arranged adjacent to and electrically connected to the first feeder 30, and the second conductive ring 46 is connected to the portion of the first conductive ring 41 close to the first feeder 30 through the third longitudinal strip 47. In this way, the second conductive ring 46 is arranged more reasonably, can play a role in expanding the bandwidth, and the improvement effect of the DAB antenna performance is more obvious.

[0067] On the basis of the above-mentioned embodiment, the second conductive ring 46 is further electrically connected to the first feeding portion 30 through a connecting member 48 .

[0068] In some embodiments, the length of the third longitudinal strip 47 includes but is not limited to 3 mm to 10 mm, specifically 3 mm, 4 mm, 5 mm, 6 mm or 10 mm, etc., and can be flexibly adjusted and set according to actual needs, and is not limited here. When the length of the third longitudinal strip 47 is adjusted, that is, the spacing size of the second conductive ring 46 and the first conductive ring 41 along the longitudinal direction is correspondingly adjusted, the performance of the DAB antenna can be improved accordingly.

[0069] In one embodiment, the second conductive ring 46 includes two fourth transverse strips 461 arranged at a relative interval and two fourth longitudinal strips 462 arranged at a relative interval. The two fourth transverse strips 461 and the two fourth longitudinal strips 462 are connected end to end in sequence to enclose the second conductive ring 46. Specifically, the length of the fourth transverse strip 461 includes but is not limited to 50 mm to 100 mm, such as 50 mm, 75 mm, 80 mm, 90 mm or 100 mm; the length of the fourth longitudinal strip 462 includes but is not limited to 5 mm to 30 mm, such as 5 mm, 10 mm, 15 mm, 20 mm, 25 mm or 30 mm.

[0070] Please refer to FIG6 . In some embodiments, the second conductive ring 46 is not limited to being arranged adjacent to the first feeder 30 as in the above embodiment. The second conductive ring 46 can also be connected to the middle position of the first conductive ring 41. The middle position of the first conductive ring 41 refers to the position of the first conductive ring 41 where the distances to the head end and the tail end of the first conductive ring 41 where the notch 412 is formed are equal. In this way, the DAB bandwidth can be expanded and the DAB band gain flatness can be reduced.

[0071] In one embodiment, the antenna device further includes a second antenna structure 50 disposed on the dielectric body 10. The second antenna structure 50 includes a fourth conductive line 51 electrically connected to the first feed portion 30 and located outside the first conductive ring 41, and / or a third conductive ring 52 electrically connected to the first feed portion 30 and located outside the first conductive ring 41 and a fifth conductive line 53 connected to the third conductive ring 52.

[0072] In some embodiments, the length of the fourth conductive line 51 is between λ3 / 4 and λ3 / 2, specifically, for example, 70 mm to 80 mm, which plays a resonant role and can be used to radiate and receive antenna signals in the second working frequency band, that is, to achieve the transmission and reception of the antenna in the DAB frequency band. Similarly, the sum of the length of the third conductive ring 52 and the length of the fifth conductive line 53 is between λ3 / 4 and λ3 / 2, specifically, for example, 70 mm to 80 mm, which plays a resonant role and also achieves the transmission and reception of the antenna in the DAB frequency band.

[0073] It should be noted that the coupling degree can be changed by adjusting the length of the second transverse strip 24 and / or adjusting the distance between the second transverse strip 24 and the third transverse strip 411, thereby achieving the purpose of adjusting the overall antenna performance.

[0074] In one embodiment, the length of the second transverse strip 24 is 100 mm to 500 mm; and / or the distance between the second transverse strip 24 and the third transverse strip 411 is 5 mm to 15 mm.

[0075] In a specific embodiment, when the length of the second transverse strip 24 is set to 300 mm and the distance between the second transverse strip 24 and the third transverse strip 411 is 10 mm, the coupling effect is better.

[0076] In one embodiment, the antenna device further includes a third antenna structure 60 disposed on the dielectric body 10 and a second feeder 70 connected to the third antenna structure 60. The third antenna structure 60 is arranged as a grid line. Specifically, the third antenna structure 60 is provided with a hollow area 601 for avoiding the brake light. The third antenna structure 60 and the first antenna structure 40 are respectively located on the upper side and the lower side of the defogging heating unit 20.

[0077] In a specific embodiment, the third antenna structure 60 includes at least four fifth transverse strips 61 arranged in sequence and at least three fifth longitudinal strips 62 arranged in sequence and at intervals. The fifth transverse strips 61 and the fifth longitudinal strips 62 are intersected and electrically connected to each other. The length of the fifth transverse strip 61 is 900mm-1300mm. The interval between two adjacent fifth transverse strips 61 is 15mm-21mm. In this way, the third antenna structure 60 is mainly used to cover the signal of the AM frequency band.

[0078] It should be noted that the number of the fifth transverse strips 61 includes but is not limited to 4, 5, 6, 7, etc. The number of the fifth longitudinal strips 62 includes but is not limited to 3, 4, 5, 6, 7, 8, etc. In addition, the length of each strip segment formed by the fifth transverse strip 61 separated by the fifth longitudinal strip 62 is not less than 50 mm. In this way, the antenna performance of the third antenna structure 60 can be guaranteed.

[0079] Through research, it is found that when the size of the hollow area 601 is adjusted, it can not only be used to avoid brake lights, but also improve the performance of the DAB antenna accordingly.

[0080] In some embodiments, the antenna device also includes a symmetrical circuit structure 80 disposed on the dielectric body 10, and the symmetrical circuit structure 80 is arranged in a grid shape, for example, symmetrically arranged with the first antenna structure 40. Among them, the first antenna structure 40 is arranged on one side below the defogger heating unit 20, and the symmetrical circuit structure 80 is arranged on the other side below the defogger heating unit 20. Under the action of the symmetrical circuit structure 80, the appearance performance of the antenna device can be improved. The symmetrical circuit structure 80 is respectively arranged with an insulated interval from the first antenna structure 40 and the defogger heating unit 20, that is, there is no electrical connection, and has no actual effect on the performance of the first antenna structure 40. Specifically, the symmetrical circuit structure 80 includes at least one second symmetrical line 81 arranged horizontally and / or vertically, which can be flexibly adjusted and arranged according to actual needs, as long as it can form a symmetrical figure after being combined with the first antenna structure 40.

[0081] Please refer to FIG. 1 to FIG. 3 . In one embodiment, a vehicle is provided. The vehicle includes the antenna device according to any one of the above embodiments.

[0082] In the above-mentioned means of transport, the first feeder 30 is electrically connected to the non-enclosed first conductive ring 41, which can realize the radiation and reception of the antenna signal of the first working frequency band, and because it is set in a ring shape, the occupied area can be reduced; in addition, through research, it is found that when the second transverse strip 24 and the third transverse strip 411 are spaced and coupled with each other, the average gain of the antenna signal of the first working frequency band can be increased, which plays a role in improving the antenna performance of the antenna signal of the first working frequency band, and the stability is better. In addition, there is no need to increase the gain by increasing the area of ​​the first antenna structure 40, that is, the area size of the first antenna structure 40 can be reduced accordingly, so that the area of ​​the defog heating unit 20 can be increased to improve the defog effect.

[0083] In one embodiment, the antenna device includes but is not limited to use in vehicles for land, air or water transportation, especially in trains, ships, airplanes and motor vehicles, for example, as rear window glass, side window glass and / or sunroof glass.

[0084] In one embodiment, the motor vehicle includes but is not limited to a car, a jeep, a public transport, a bus, a truck, an airplane, a train, a taxi, a coach, etc. The motor vehicle includes the antenna device of any of the above embodiments, and also includes a vehicle body, and the antenna device is connected to the vehicle body. When the motor vehicle is a car as an example, the antenna device includes but is not limited to a front windshield, a rear windshield, a corner window, a sunroof, left and right side windows, etc.

[0085] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0086] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0087] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0088] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An antenna device, It is characterized in that The antenna device comprises: Medium body; A demisting heating unit, the demisting heating unit is arranged in the middle part of the medium body, the demisting heating unit comprises two busbars arranged at intervals, a plurality of first transverse bars electrically connected between the two busbars and arranged at intervals in sequence, first longitudinal bars respectively connected to each of the first transverse bars, and second transverse bars connected to the first longitudinal bars; A first feeding portion disposed on the dielectric body; and A first antenna structure is arranged on the dielectric body, the first antenna structure comprises a non-enclosed first conductive ring, the first conductive ring comprises a third transverse strip spaced apart from and coupled to the second transverse strip, and the first conductive ring is electrically connected to the first feeding portion.

2. The antenna device according to claim 1, It is characterized in that The first conductive ring is formed with a notch, and the notch is located at the first end of the third transverse strip, and the first end of the third transverse strip is electrically connected to the first feeding portion.

3. The antenna device according to claim 2, It is characterized in that The first conductive ring also includes a second longitudinal strip connected to the second end of the third transverse strip and a first conductive line connected to the second longitudinal strip; an end of the first conductive line away from the second longitudinal strip is spaced apart from the first end of the third transverse strip to form the gap.

4. The antenna device according to claim 3, It is characterized in that The first antenna structure further includes a second conductive line disposed on the dielectric body and located outside the first conductive ring, wherein the second conductive line is connected to the second longitudinal strip and / or the first conductive line.

5. The antenna device according to claim 3, It is characterized in that The first antenna structure also includes a third conductive wire disposed on the dielectric body and located outside the first conductive ring, one end of the third conductive wire is electrically connected to the first feeding portion, and the other end of the third conductive wire is set as a free end.

6. The antenna device according to claim 3, It is characterized in that The first antenna structure also includes a plurality of branch lines arranged on the dielectric body and located inside the first conductive ring, one end of the branch line is directly or indirectly electrically connected to the first conductive ring, and the other end of the branch line is a free end.

7. The antenna device according to claim 6, It is characterized in that The antenna device further comprises a plurality of suspension lines arranged on the dielectric body and located inside the first conductive ring. The suspension lines are respectively arranged with insulation intervals from the first conductive ring and the branch lines and are coupled to each other.

8. The antenna device according to claim 7, It is characterized in that The first antenna structure also includes a second conductive ring that is disposed on the dielectric body and outside the first conductive ring and is closed. The second conductive ring is electrically connected to the first conductive ring, and the length of the second conductive ring is less than that of the first conductive ring.

9. The antenna device according to claim 8, It is characterized in that The first antenna structure also includes a third longitudinal strip arranged between the second conductive ring and the first conductive ring, the second conductive ring is arranged adjacent to and electrically connected to the first feeding part, and the second conductive ring is connected to the first conductive ring at a position close to the first feeding part through the third longitudinal strip.

10. The antenna device according to claim 8, It is characterized in that The second conductive ring includes two fourth transverse strips that are relatively spaced apart and two fourth longitudinal strips that are relatively spaced apart. The two fourth transverse strips and the two fourth longitudinal strips are sequentially connected end to end to enclose the second conductive ring.

11. The antenna device according to claim 1, It is characterized in that The antenna device also includes a second antenna structure arranged on the dielectric body; the second antenna structure includes a fourth conductive wire electrically connected to the first feeding part and located outside the first conductive ring, and / or a third conductive ring electrically connected to the first feeding part and located outside the first conductive ring and a fifth conductive wire connected to the third conductive ring.

12. The antenna device according to claim 1, It is characterized in that The antenna device also includes a third antenna structure arranged on the dielectric body and a second feeding portion connected to the third antenna structure; the third antenna structure and the first antenna structure are respectively located on the upper side and the lower side of the demisting heating unit.

13. A means of transportation, It is characterized in that The vehicle comprises the antenna device according to any one of claims 1 to 12.

Images