Feed structure of antenna, antenna and vehicle

Abstract

The utility model discloses a feed structure of an antenna, the antenna and a vehicle. The feed structure comprises a circuit board assembly; the return loss adjusting part is arranged on the circuit board assembly; and the coaxial line is located in the central area in the circuit board assembly, and the coaxial line is electrically connected with the circuit board assembly and the return loss adjusting piece, so that two paths of symmetrical differential signals can be formed to drive the plurality of oscillator pairs. Therefore, the feed structure forms two groups of symmetrical differential signals, on one hand, the differential signals are utilized to drive the oscillators to reduce the influence of the mounting surface on the antenna oscillators, and on the other hand, the two groups of symmetrical differential signals are utilized to drive the plurality of oscillators to enhance the gain in the horizontal direction or facilitate the adjustment of a directional diagram.

Description

Antenna feed structure, antenna and vehicle Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to an antenna feeding structure, an antenna, and a vehicle. Background Technology

[0002] With the development of drone technology, in-vehicle control of drones for functions such as navigation and photography has a certain market potential. Achieving in-vehicle drone control requires installing an antenna on the vehicle roof. However, roof-mounted antennas have strict requirements on antenna height, and the metal roof surface can affect antenna performance. Furthermore, the antenna needs to have low non-circularity, high horizontal gain, and dual-band operation. These unique characteristics present new design requirements for the antenna. This application also applies to the interconnection of handheld terminal products and vehicles. Summary of the Invention

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of this invention is to propose a feeding structure for an antenna that forms two sets of symmetrical differential signals. On the one hand, using differential signals to drive the vibrators can reduce the influence of the mounting surface on the antenna vibrators; on the other hand, using two sets of symmetrical differential signals to drive multiple vibrators can enhance the horizontal gain or facilitate the adjustment of the radiation pattern.

[0004] This utility model further proposes an antenna.

[0005] This utility model also proposes a vehicle.

[0006] The antenna feeding structure according to a first aspect embodiment of the present invention includes: a circuit board assembly; a return loss adjustment element disposed on the circuit board assembly; and a coaxial line located in the central region within the circuit board assembly. The coaxial line is electrically connected to the circuit board assembly and the return loss adjustment element respectively to form a symmetrical differential signal.

[0007] Thus, the feeding structure forms two sets of symmetrical differential signals. On the one hand, the differential signals can be used to drive the vibrators, which can reduce the influence of the mounting surface on the antenna vibrators. On the other hand, using two sets of symmetrical differential signals to drive multiple vibrators can enhance the horizontal gain or facilitate the adjustment of the radiation pattern.

[0008] According to some embodiments of the present invention, the coaxial cable has a first power supply output terminal and a second power supply output terminal. The first power supply output terminal is electrically connected to a part of the circuit board assembly and the return loss adjustment component, respectively. The second power supply output terminal is electrically connected to another part of the circuit board assembly, so that the signal input from the coaxial cable is converted into differential signals and transmitted to the circuit board assembly.

[0009] According to some embodiments of the present invention, the circuit board assembly includes: a first circuit board, which is used to transmit one pole of a differential signal; a second circuit board, which is stacked with the first circuit board and is used to transmit the other pole of a differential signal; wherein the coaxial line is located at the center of the first circuit board and the second circuit board, and the first power supply output terminal is electrically connected to the first circuit board and the return loss adjustment component respectively.

[0010] According to some embodiments of the present invention, the first circuit board is provided with a first power supply layer, and the second circuit board is provided with a second power supply layer. The shapes of the first power supply layer and the second power supply layer are symmetrically arranged with respect to the central axis of the circuit board assembly to minimize signal leakage.

[0011] According to some embodiments of the present invention, an electrically accommodating space is formed between the first feed layer and the second feed layer to accommodate the coaxial cable.

[0012] According to some embodiments of the present invention, both the first circuit board and the second circuit board are provided with wire grooves, and the coaxial cable is disposed in the wire grooves.

[0013] According to some embodiments of the present invention, both the first feed layer and the second feed layer are multilayered to occupy the minimum volume while meeting specific impedance requirements.

[0014] According to some embodiments of the present invention, the first power supply layer includes: a first conductive layer; a second conductive layer, the first conductive layer and the second conductive layer are electrically connected and spaced apart in the thickness direction of the first circuit board, and the first power supply output terminal is electrically connected to the first conductive layer and the return loss adjustment component, respectively.

[0015] According to some embodiments of the present invention, the first power feeding layer further includes: a plurality of first conductive pillars, the plurality of first conductive pillars being electrically connected to the first conductive layer and the second conductive layer respectively, and the plurality of first conductive pillars being spaced apart along the length direction of the first conductive layer.

[0016] According to some embodiments of the present invention, the first circuit board further includes: a first substrate, the first power supply layer and the return loss adjustment member being disposed at intervals on the first substrate, the return loss adjustment member and the first conductive layer being disposed at intervals in the thickness direction of the first substrate, and the return loss adjustment member and the second conductive layer being disposed at intervals in the width direction of the first substrate.

[0017] According to some embodiments of the present invention, the first substrate includes: a first dielectric layer; a second dielectric layer, wherein the first dielectric layer and the second dielectric layer are stacked; wherein the first conductive layer is disposed on the side of the first dielectric layer away from the second dielectric layer, and the second conductive layer and the return loss adjustment member are disposed on the side of the second dielectric layer close to the first dielectric layer.

[0018] According to some embodiments of the present invention, the second power supply layer includes: a third conductive layer; a fourth conductive layer, wherein the third conductive layer and the fourth conductive layer are electrically connected and spaced apart in the thickness direction of the second circuit board, and the second power supply output terminal is electrically connected to the third conductive layer.

[0019] According to some embodiments of the present invention, the second power feeding layer further includes: a plurality of second conductive pillars, the plurality of second conductive pillars being electrically connected to the third conductive layer and the fourth conductive layer respectively, and the plurality of second conductive pillars being spaced apart in the length direction of the third conductive layer.

[0020] According to some embodiments of the present invention, the second circuit board further includes: a second substrate, the second substrate being stacked with the first circuit board, the second power supply layer being disposed on the second substrate, and the second power supply output terminal being electrically connected to the second power supply layer.

[0021] According to some embodiments of the present invention, the second substrate includes: a third dielectric layer; a fourth dielectric layer, wherein the third dielectric layer and the fourth dielectric layer are stacked; wherein the third conductive layer is disposed on the side of the third dielectric layer away from the fourth dielectric layer, and the fourth conductive layer is disposed on the side of the fourth dielectric layer close to the third dielectric layer.

[0022] According to some embodiments of the present invention, the first feed layer and the second feed layer are symmetrical about the first feed output end along the length of the coaxial line, so that the direction of the maximum power value of the antenna pattern approaches the horizontal direction.

[0023] An antenna according to a second aspect of the present invention includes: a pair of vibrators, the pair of vibrators being electrically connected to the circuit board assembly; and a feeding structure for the antenna.

[0024] According to some embodiments of the present invention, the oscillator pair is used for differential signal driving, and the oscillator pair is sleeved on the outer periphery of the circuit board assembly and spaced apart along the length direction of the circuit board assembly.

[0025] According to some embodiments of the present invention, the oscillator pairs are arranged in an array along the length direction of the circuit board assembly.

[0026] According to some embodiments of the present invention, the oscillator pair includes: a plurality of oscillators, which are spaced apart along the length direction of the circuit board assembly.

[0027] According to some embodiments of this utility model, the oscillator is constructed in a circular ring shape.

[0028] According to some embodiments of this utility model, the oscillator is a multi-layered nested annular oscillator.

[0029] According to some embodiments of the present invention, the inner layer length of the oscillator is greater than or equal to the outer layer length.

[0030] According to some embodiments of the present invention, a fifth dielectric layer is provided between the inner and outer layers of the oscillator, and the fifth dielectric layer is sleeved on the outer periphery of the inner layer.

[0031] According to some embodiments of the present invention, the outer layer of the oscillator is provided with a sixth dielectric layer, which is used to fix the oscillator or adjust the direction pattern.

[0032] According to some embodiments of the present invention, the oscillator pair further includes: a plurality of oscillator seats, the oscillator seats being disposed between the oscillator and the circuit board assembly, and the oscillator being electrically connected to the circuit board assembly through the oscillator seats.

[0033] According to some embodiments of the present invention, one of the plurality of oscillator seats is electrically connected to the first conductive layer, and another of the plurality of oscillator seats is electrically connected to the third conductive layer.

[0034] The vehicle according to a third aspect of the present invention includes: the antenna described above.

[0035] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0037] Figure 1 is a schematic diagram of the antenna structure according to an embodiment of the present invention;

[0038] Figure 2 is a cross-sectional schematic diagram of the inside of the antenna according to an embodiment of the present invention;

[0039] Figure 3 is a schematic diagram of the structure of the oscillator seat disposed on the circuit board according to an embodiment of the present utility model;

[0040] Figure 4 is a schematic diagram of a circuit board assembly containing a first power feeding layer according to an embodiment of the present invention.

[0041] Figure 5 is a schematic diagram of the structure of the first feed layer according to an embodiment of the present invention;

[0042] Figure 6 is a schematic diagram of the structure of the second feed layer according to an embodiment of the present invention;

[0043] Figure 7 is an exploded view of an antenna according to an embodiment of the present invention;

[0044] Figure 8 is a schematic diagram of the structure of the wire core through the return loss adjustment member and the first conductive layer according to an embodiment of the present utility model;

[0045] Figure 9 is a structural schematic diagram of the return loss adjustment component according to an embodiment of the present utility model;

[0046] Figure 10 is a schematic diagram of an antenna containing a pair of vibrators according to an embodiment of the present invention;

[0047] Figure 11 is an exploded view of an antenna containing a pair of vibrators according to an embodiment of the present invention;

[0048] Figure 12 is an exploded view of the antenna feeding structure according to an embodiment of the present invention;

[0049] Figure 13 is a horizontal gain diagram of an antenna containing two pairs of vibrators according to an embodiment of the present invention;

[0050] Figure 14 is a diagram showing the overall efficiency of an antenna containing two pairs of vibrators according to an embodiment of the present invention.

[0051] Figure 15 is a horizontal gain diagram of an antenna containing a pair of vibrators with a horizontal plane angle of 0 degrees according to an embodiment of the present invention.

[0052] Figure 16 is a horizontal gain diagram of an antenna containing a pair of vibrators with a horizontal plane angle of 90 degrees according to an embodiment of the present invention.

[0053] Figure 17 is a cross-sectional view of the antenna containing a pair of vibrators with a horizontal angle of 90 degrees according to an embodiment of the present invention;

[0054] Figure 18 is a diagram showing the overall efficiency of an antenna containing a pair of vibrators according to an embodiment of the present invention.

[0055] Figure label:

[0056] 100. Power supply structure;

[0057] 10. Circuit board assembly; 11. First circuit board; 111. First substrate; 1112. First dielectric layer; 1113. Second dielectric layer;

[0058] 112, First feed layer; 1121, First conductive layer; 11211, First via; 11212, Third via; 1122, Second conductive layer; 1123, First conductive post;

[0059] 12. Second circuit board; 121. Second substrate; 1211. Third dielectric layer; 1212. Fourth dielectric layer;

[0060] 122, Second feed layer; 1221, Third conductive layer; 1222, Fourth conductive layer; 12221, Clearance groove; 1223, Grounding component; 1224, Second conductive post;

[0061] 13. Cable trays;

[0062] 20. Return loss adjustment component; 21. Second through hole; 22. First power supply output terminal; 23. Second power supply output terminal;

[0063] 30. Coaxial cable; 31. Core wire; 32. Dielectric layer of coaxial cable; 33. Outer metal layer of coaxial cable;

[0064] 41. Oscillator; 42. Oscillator seat; 43. Oscillator pair; 411. Inner layer; 412. Outer layer;

[0065] 51. Sixth dielectric layer; 52. Fifth dielectric layer; 200. Antenna. Detailed Implementation

[0066] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0067] The following description, with reference to Figures 1-18, describes the feeding structure 100 of the antenna 200 according to a first aspect embodiment of the present invention. The feeding structure 100 of the antenna 200 includes: a circuit board assembly 10, a return loss adjustment element 20, and a coaxial line 30. The return loss adjustment element 20 is disposed on the circuit board assembly 10. The coaxial line 30 is located in the central region within the circuit board assembly 10. The coaxial line 30 is electrically connected to the circuit board assembly 10 and the return loss adjustment element 20, thereby forming two symmetrical differential signals.

[0068] Specifically, traditional antennas typically feed the vibrator through series or parallel feeding. Some omnidirectional antennas can simultaneously cover the 5.15GHz-5.85GHz and 5.925GHz-7.125GHz frequency bands. However, these frequency bands have relatively small bandwidth, high non-circularity, and low horizontal gain, resulting in low overall antenna efficiency. Furthermore, the coaxial cable has a significant impact on the vibrator.

[0069] Therefore, the feeding structure 100 of antenna 200 needs to be optimized. This feeding structure 100 allows the coaxial cable 30 to penetrate deep into the interior of the antenna for feeding without coupling with the vibrator 41. Thus, when antenna 200 is an array antenna, the vibrator 41 of antenna 200 can receive the same energy and in phase drive, thereby maintaining the radiation pattern of antenna 200 at its maximum in the horizontal direction. This antenna 200 has a multi-layer ring structure, which can maintain a relatively small non-circularity and realize dual-band functionality.

[0070] The antenna 200 is a vertically polarized antenna. The feed structure 100 mainly consists of a circuit board assembly 10, a return loss adjustment component 20, and a coaxial cable 30. The coaxial cable 30 is located in the central area of ​​the circuit board assembly 10. The return loss adjustment component 20 is set inside the circuit board assembly 10 and is used to adjust the impedance matching. The coaxial cable 30 is electrically connected to the circuit board assembly 10 and the return loss adjustment component 20, respectively.

[0071] Specifically, the coaxial cable 30 is positioned in the middle of the circuit board assembly 10, so that the feed structure 100 can shield the ground of the coaxial cable 30 placed therein from the influence of the vibrator 41 of the antenna 20. The coaxial cable 30, enclosed and shielded by the feed structure 100, extends deep into the antenna structure, ensuring that the internal feed point is located at the center of the feed structure 100, providing a symmetrical feed signal to the vibrator 41 array centered on the internal feed point. One end of the coaxial cable 30 is a connector end, which is also the feed end. The connector end extends from inside the circuit board assembly 10 and is used to feed the antenna 200. For example, the connector end can be connected to an SMA connector or a Fakra connector. The coaxial cable 30 is electrically connected to both the circuit board assembly 10 and the return loss adjustment component 20. The outer layer of the coaxial cable 30 is insulated and serves as ground. The wire core 31 of the coaxial cable 30 forms a positive electrode relative to the insulated outer layer. Since the coaxial cable 30 is electrically connected to one side of the circuit board assembly 10, the portion of the coaxial cable 30 connected to the circuit board assembly 10 forms a positive electrode. Furthermore, the coaxial cable 30 is also electrically connected to the return loss adjustment element 20. The single-ended signal of the core 31 of the coaxial cable 30 forms a differential signal through the circuit board assembly 10 and the return loss adjustment element 20. In this way, the power supply structure 100 supplies power to the oscillator 41 through the differential signal. Since the coaxial cable 30 is located in the central region within the circuit board assembly (10), the distance from the oscillator 41 to the side of the circuit board assembly 10 that forms the positive pole is the same as the distance from the oscillator 41 to the other side of the circuit board assembly 10 that forms the negative pole. This can form a symmetrical differential signal, thereby reducing the influence of the circuit board assembly 10 on the oscillator 41. The outer periphery of the circuit board assembly (10) is provided with multiple pairs of oscillators (43). For example, one pair of oscillators (43) is located on one side of the connection between the feed end of the coaxial line (30) and the circuit board assembly (10), and another pair of oscillators (43) is located on the other side of the connection between the coaxial line (30) and the circuit board assembly (10), thereby forming two symmetrical differential signals to drive the multiple pairs of oscillators (43).

[0072] Thus, the feeding structure forms two sets of symmetrical differential signals. On the one hand, the differential signal driving the vibrator 41 can reduce the influence of the mounting surface on the antenna vibrator. On the other hand, using two sets of symmetrical differential signals to drive multiple vibrators 41 can enhance the horizontal gain or facilitate the adjustment of the radiation pattern.

[0073] The differential signal generated by the feed structure 100 can reduce the impact on the antenna element 41 and facilitate the adjustment of the radiation pattern.

[0074] According to some embodiments of the present invention, as shown in FIG8, the coaxial cable 30 has a first power output terminal 22 and a second power output terminal 23. The first power output terminal 22 is electrically connected to a part of the circuit board assembly 10 and the return loss adjustment component 20, respectively, and the second power output terminal 23 is electrically connected to another part of the circuit board assembly 10, thereby enabling the signal input from the coaxial cable (30) to be converted into differential signals and transmitted to the circuit board assembly 10 respectively.

[0075] The first feed output terminal 22 is the feed terminal of the coaxial line 30, and the second feed output terminal is the outer layer of the coaxial line 30. The first feed output terminal 22 is electrically connected to a part of the circuit board assembly 10 and the return loss adjustment component 20. The return loss adjustment component 20 can adjust the return loss of the feed system and act as a balun, so that the signal input from the coaxial line 30 is converted into a differential signal and transmitted to a part of the circuit board assembly 10 and another part of the circuit board assembly 10 respectively. The differential signal formed in this way can reduce the impact on the antenna vibrator 41.

[0076] According to some embodiments of the present invention, as shown in FIG8, the circuit board assembly 10 includes: a first circuit board 11 and a second circuit board 12. The first circuit board 11 is used to transmit one pole of the differential signal. The second circuit board 12 is stacked with the first circuit board 11, and the second circuit board 12 is used to transmit the other pole of the differential signal. The coaxial line 30 is located at the center of the first circuit board 11 and the second circuit board 12. The first power supply output terminal 22 is electrically connected to the first circuit board 11 and the return loss adjustment component 20, respectively.

[0077] Wherein, when one pole of the first circuit board 11 used for transmitting differential signals can be formed as a positive pole, the other pole of the second circuit board 12 used for transmitting differential signals can be formed as a negative pole. Similarly, when one pole of the first circuit board 11 used for transmitting differential signals can be formed as a negative pole, the other pole of the second circuit board 12 used for transmitting differential signals can be formed as a positive pole. In this way, the first circuit board 11 and the second circuit board 12 can form different polarities.

[0078] Furthermore, the coaxial line 30 is located at the center of the first circuit board 11 and the second circuit board 12. The distance from the center of the coaxial line 30 to the side of the circuit board assembly 10 that forms the positive electrode is the same as the distance from the other side of the circuit board assembly 10 that forms the negative electrode. This further reduces the influence of the coaxial line 30 on the vibrator 41. In this way, the differential signal generated by the feed structure 100 can reduce its impact on the antenna 200.

[0079] According to some embodiments of the present invention, as shown in Figures 4-6, the first circuit board 11 is provided with a first power supply layer 112, and the second circuit board 12 is provided with a second power supply layer 122. The shapes of the first power supply layer 112 and the second power supply layer are symmetrically arranged with respect to the central axis of the circuit board assembly 10, thereby minimizing signal leakage.

[0080] The first feed layer 112 can form the transmission line of the first circuit board 11, and the second feed layer 122 can form the transmission line of the second circuit board 12. The transmission lines of the first circuit board 11 and the transmission lines of the second circuit board 12 are symmetrically arranged, which can ensure that the impedance matching between the two transmission lines is more consistent. Good impedance matching can reduce the generation of reflected waves, thereby reducing signal leakage and forming minimal signal leakage.

[0081] According to some embodiments of the present invention, an electrically accommodating space is formed between the first feed layer 112 and the second feed layer 122, thereby accommodating the coaxial cable 30.

[0082] The accommodating space can provide installation space for the arrangement of the coaxial line 30, and can also facilitate the adjustment of the distance between the first feed layer 112 and the second feed layer 122 relative to the coaxial line 30.

[0083] According to some embodiments of the present invention, both the first feed layer 112 and the second feed layer 122 are multilayered, thereby occupying the smallest volume while meeting specific impedance requirements.

[0084] The first power supply layer 112 is configured as a multi-layer structure, and the second power supply layer 122 is also configured as a multi-layer structure. By stacking multiple signal layers, the vertical space of the circuit board assembly 10 is fully utilized, and more transmission lines can be arranged within a limited planar area, thereby reducing the volume occupied.

[0085] According to some embodiments of the present invention, the first circuit board 11 includes: a first substrate 111, a first power supply layer 112 and a return loss adjustment member 20 disposed at intervals on the first substrate 111.

[0086] The first substrate 111 can provide a mounting position for the first feed layer 112. The first feed layer 112 and the return loss adjustment member 20 are spaced apart on the first substrate 111. That is, the first substrate 111 separates the first feed layer 112 from the return loss adjustment member 20, so that a distance is formed between the first feed layer 112 and the return loss adjustment member 20.

[0087] Furthermore, the coaxial cable 30 is electrically connected to the first feed layer 112 and the return loss adjustment component 20, respectively. Specifically, the first feed output terminal 22 (core 31) of the coaxial cable 30 is electrically connected to the first feed layer 112, and the outer insulating layer of the coaxial cable 30 is ground. Thus, the first feed output terminal 22 of the coaxial cable 30 forms a positive electrode relative to its outer insulating layer, and the first feed layer 112 also forms a positive electrode. The first feed output terminal 22 of the coaxial cable 30, which forms a positive electrode relative to its outer insulating layer, is electrically connected to the return loss adjustment component 20. The return loss adjustment component 20 can be made of copper foil, and the length and width of the metal foil can be adjusted to change the coupling frequency and change the phase of the signal, thereby converting the single-ended signal into a differential signal.

[0088] According to some embodiments of the present invention, as shown in FIG4, the first power supply layer 112 includes: a first conductive layer 1121 and a second conductive layer 1122, the first conductive layer 1121 and the second conductive layer 1122 are electrically connected, and the first conductive layer 1121 and the second conductive layer 1122 are spaced apart in the thickness direction of the first circuit board 11. The first power supply output terminal 22 is electrically connected to the first conductive layer 1121 and the return loss adjustment member 20 respectively.

[0089] The first conductive layer 1121 and the second conductive layer 1122 are spaced apart in the thickness direction of the first circuit board 11. For example, both the first conductive layer 1121 and the second conductive layer 1122 can be made of copper foil layers. In this way, the first feed layer 112 has a non-planar shape, which can accommodate the relatively small space inside the oscillator 41. The first feed output terminal 22 of the coaxial line 30, which forms a positive electrode relative to its insulating outer layer, is electrically connected to the first conductive layer 1121, so that the first conductive layer 1121 can form a positive electrode.

[0090] According to some embodiments of the present invention, as shown in FIG4, the return loss adjustment member 20 and the first conductive layer 1121 are spaced apart in the thickness direction of the first substrate 111, and the return loss adjustment member 20 and the second conductive layer 1122 are spaced apart in the width direction of the first substrate 111.

[0091] The return loss adjustment component 20 and the first conductive layer 1121 are spaced apart in the thickness direction of the first substrate 111, which can reduce the influence of the return loss adjustment component 20 on the first conductive layer 1121. The return loss adjustment component 20 and the second conductive layer 1122 are spaced apart in the width direction of the first substrate 111, which can avoid the influence of the return loss adjustment component 20 on the second conductive layer 1122 and also ensure the installation position of the return loss adjustment component 20.

[0092] According to some embodiments of the present invention, the first conductive layer 1121 is formed with a first through hole 11211, and the return loss adjusting member 20 is formed with a second through hole 21. The first through hole 11211 and the second through hole 21 are arranged opposite to each other. One end of the coaxial line 30 passes through the first through hole 11211 and the second through hole 21, so that it can be electrically connected to the first conductive layer 1121 and the return loss adjusting member 20 respectively.

[0093] One end of the coaxial cable 30, where the core 31 of the coaxial cable 30 is connected to the first conductive layer 1121, is bent to facilitate the passage of the first through-hole 11211, thereby enabling the first conductive layer 1121 to form a positive electrode. Simultaneously, the bent end of the coaxial cable 30 passes through a second through-hole 21, and the return loss adjustment element 20 is electrically connected to one end of the coaxial cable 30. The return loss adjustment element 20 acts as a balun, facilitating the conversion of the single-ended signal of the coaxial cable 30 into a differential signal.

[0094] According to some embodiments of the present invention, as shown in Figures 4-6, there are at least two second conductive layers 1122, and in the width direction of the first substrate 111, at least two second conductive layers 1122 are located on both sides of the return loss adjustment member 20.

[0095] There are at least two second conductive layers 1122. For example, there can be two second conductive layers 1122. The two second conductive layers 1122 are spaced apart in the width direction of the first substrate 111. The two second conductive layers 1122 are located on both sides of the return loss adjustment member 20. This can reduce the signal distance between the two second conductive layers 1122 and reduce the size of the second substrate 121 in the width direction, thereby better reducing signal loss during transmission and improving signal integrity.

[0096] According to some embodiments of the present invention, as shown in Figures 4-6, the first power feeding layer 112 further includes: a plurality of first conductive pillars 1123, which are electrically connected to the first conductive layer 1121 and the second conductive layer 1122 respectively, and the plurality of first conductive pillars 1123 are spaced apart in the length direction of the first substrate 111.

[0097] In this configuration, multiple first conductive pillars 1123 are electrically connected to the first conductive layer 1121 and the second conductive layer 1122, respectively. This allows the first conductive layer 1121 to be electrically connected to the second conductive layer 1122 through the first conductive pillars 1123. Thus, the first conductive layer 1121, which forms a positive electrode, can also form a positive electrode in the second conductive layer 1122, thereby making the first conductive layer 1121 and the second conductive layer 1122 a single unit.

[0098] Furthermore, multiple first conductive pillars 1123 are provided, and the multiple first conductive pillars 1123 are spaced apart in the length direction of the first substrate 111, so that the electrical connection between the first conductive layer 1121 and the second conductive layer 1122 can be more stable.

[0099] According to some embodiments of the present invention, as shown in FIG5, the first conductive layer 1121 has a third through hole 11212, the third through hole 11212 extends along the length direction of the first substrate 111, and the third through hole 11212 is spaced apart from the position of the first conductive layer 1121 connected to the coaxial line 30 in the length direction of the first substrate 111.

[0100] The third through-hole 11212 extends along the length of the first substrate 111, which can increase the distance between the first feed layer 112 and the coaxial line 30, thereby avoiding the first feed layer 112 and the coaxial line 30 being too close.

[0101] According to some embodiments of the present invention, as shown in FIG3, the first substrate 111 includes: a first dielectric layer 1112 and a second dielectric layer 1113, wherein the first dielectric layer 1112 and the second dielectric layer 1113 are stacked, wherein the first conductive layer 1121 is disposed on the side of the first dielectric layer 1112 away from the second dielectric layer 1113, and the second conductive layer 1122 and the return loss adjustment member 20 are disposed on the side of the second dielectric layer 1113 close to the first dielectric layer 1112.

[0102] The first conductive layer 1121 is disposed on the side of the first dielectric layer 1112 away from the second dielectric layer 1113, thereby forming a positive electrode on the surface of the first dielectric layer 1112. The second conductive layer 1122 and the return loss adjustment element 20 are disposed on the side of the second dielectric layer 1113 closer to the first dielectric layer 1112. This makes reasonable use of the space between the first dielectric layer 1112 and the second dielectric layer 1113, thereby increasing the placement space for the first conductive layer 1121 and the second conductive layer 1122. The return loss adjustment element 20 is located in the middle of the width direction of the second dielectric layer 1113, which also ensures the proper placement of the return loss adjustment element 20. Different positions of the return loss adjustment element 20 will affect the formed differential signal.

[0103] According to some embodiments of the present invention, the circuit board assembly 10 includes: a first circuit board 11 and a second circuit board 12, the first circuit board 11 and the second circuit board 12 are stacked, wherein a coaxial line 30 is disposed between the first circuit board 11 and the second circuit board 12, and the coaxial line 30 is electrically connected to the first circuit board 11 and the return loss adjustment member 20 respectively.

[0104] The coaxial cable 30 is positioned between the first circuit board 11 and the second circuit board 12, providing a mounting position for the coaxial cable 30 and preventing it from shifting. Furthermore, the coaxial cable 30 is electrically connected to both the first circuit board 11 and the return loss adjustment component 20, and the core 31 of the coaxial cable 30 is electrically connected to the first circuit board 11, thus enabling the first circuit board 11 to form a positive electrode.

[0105] According to some embodiments of the present invention, both the first circuit board 11 and the second circuit board 12 are provided with wire grooves 13, and the coaxial line (30) is provided in the wire groove (13).

[0106] The first circuit board 11 is provided with a wire groove 13, and the second circuit board 12 is also provided with a wire groove 13. The wire groove 13 of the first circuit board 11 and the wire groove 13 of the second circuit board 12 are arranged opposite to each other, so as to provide installation space for the coaxial cable 30 and to realize the positioning and installation of the first circuit board 11 and the second circuit board 12.

[0107] Furthermore, the first circuit board 11 may be provided with a latching protrusion, and correspondingly, the second circuit board 12 is provided with a latching groove. The latching protrusion and the latching groove engage with each other, thereby facilitating the installation and removal of the first circuit board 11 and the second circuit board 12.

[0108] Furthermore, the coaxial cable 30 is positioned between the first circuit board 11 and the second circuit. Taking advantage of the fact that the differential signal generated by the first circuit board 11 and the second circuit board 12 has no signal in the middle (i.e., it is the same as ground), the influence of the coaxial cable 30 used for power feeding on the radiated signal can be avoided. In other words, if the coaxial cable 30 is connected from the connector end of the antenna 200 to the middle position of the antenna 200, regardless of where it runs, as a metal wire, it will affect the radiation of the antenna 200, thus affecting the radiation pattern. However, if it runs through the middle of the differential signal between the first circuit board 11 and the second circuit, the outer layer of the coaxial cable 30 is ground, and the middle of the differential signal between the first circuit board 11 and the second circuit is at the midpoint between positive and negative, which is also equivalent to ground. Therefore, the impact on the differential signal is minimal, thus avoiding any influence on the radiation of the antenna 200.

[0109] According to some embodiments of the present invention, the coaxial cable 30 includes: a core 31, a dielectric layer 32 of the coaxial cable, and an outer metal layer 33 of the coaxial cable. The core 31 is electrically connected to the first circuit board 11 and the return loss adjustment component 20, respectively. The dielectric layer 32 of the coaxial cable is sleeved on the outer periphery of the core 31, and the outer metal layer 33 of the coaxial cable is electrically connected to the second circuit board 12.

[0110] In this design, the dielectric layer 32 of the coaxial cable is sleeved around the outer periphery of the core 31, and the outer metal layer 33 of the coaxial cable is disposed around the outer periphery of the dielectric layer 32. The outer metal layer 33 acts as a grounded shield, effectively reducing the impact of external electromagnetic interference on the signal in the core 31. The grounded outer metal layer 33 can absorb and guide interference signals, thereby protecting the signal quality in the core 31. The core 31 forms a positive electrode relative to the outer metal layer 33 of the coaxial cable, and the core 31 is electrically connected to the first circuit board 11, thus enabling the first circuit board 11 to form a positive electrode.

[0111] Furthermore, the return loss adjustment component 20 is electrically connected to the wire core 31. Since the outer metal layer 33 of the coaxial cable is electrically connected to the second circuit board 12, the return loss adjustment component 20 and the second circuit board 12 can form a negative pole relative to each other under the action of the magnetic field.

[0112] According to a specific embodiment of the present invention, the second circuit board 12 includes: a second substrate 121 and a second power feeding layer 122. The second substrate 121 is stacked with the first circuit board 11, and the second power feeding output terminal 23 is electrically connected to the second power feeding layer 122.

[0113] The second substrate 121 can be provided with a carrier and mounting position by the second feed layer 122. The second feed output terminal 23 is electrically connected to the second feed layer 122. The return loss adjustment component 20 can be set as a metal copper foil. The length and width of the metal foil can be adjusted to change the coupling frequency, thereby converting the single-ended signal into a differential signal.

[0114] According to some embodiments of the present invention, the second power supply layer 122 includes a third conductive layer 1221 and a fourth conductive layer 1222, which are electrically connected and are spaced apart in the thickness direction of the second circuit board 12. The second power supply output terminal 23 is electrically connected to the third conductive layer 1221.

[0115] The third conductive layer 1221 and the fourth conductive layer 1222 are spaced apart along the thickness direction of the second circuit board 12. For example, both the third conductive layer 1221 and the fourth conductive layer 1222 can be made of copper foil layers. This effectively reduces mutual interference between the third conductive layer 1221 and the fourth conductive layer 1222, thereby reducing the impact of electromagnetic interference. The spaced arrangement helps reduce signal crosstalk and improve signal transmission quality, thus ensuring the reliability and stability of data transmission.

[0116] Furthermore, the second power output terminal 23 is electrically connected to the third conductive layer 1221, which allows the third conductive layer 1221 to be connected to ground, thereby facilitating the formation of a negative electrode by the third conductive layer 1221 under the influence of the magnetic field of the return loss regulating element 20.

[0117] According to some embodiments of the present invention, the second power feeding layer 122 further includes a grounding element 1223, wherein the grounding element 1223 and the third conductive layer 1221 are spaced apart in the thickness direction of the second substrate 121, and the grounding element 1223 and the fourth conductive layer 1222 are spaced apart in the width direction of the second substrate 121, thereby making the position of the grounding element 1223 more accurate.

[0118] Furthermore, the grounding element 1223 is electrically connected to the outer metal layer 33 of the coaxial line, thereby enabling the third conductive layer 1221 to be indirectly electrically connected to the outer metal layer 33 of the coaxial line through the grounding element 1223, thus making the connection between the outer metal layer 33 of the coaxial line and the third conductive layer 1221 more stable.

[0119] According to some embodiments of the present invention, there are at least two fourth conductive layers 1222, and in the width direction of the second substrate 121, at least two fourth conductive layers 1222 are located on both sides of the grounding member 1223.

[0120] For example, two fourth conductive layers 1222 can be provided, with the two fourth conductive layers 1222 spaced apart in the width direction of the second substrate 121. The two fourth conductive layers 1222 are located on both sides of the grounding member 1223. This can reduce the signal distance between the two fourth conductive layers 1222 and reduce the size of the second substrate 121 in the width direction, thereby better reducing signal loss during transmission and improving signal integrity.

[0121] According to some embodiments of the present invention, the second substrate 121 includes a third dielectric layer 1211 and a fourth dielectric layer 1212, which are stacked together. The third conductive layer 1221 is disposed on the side of the third dielectric layer 1211 away from the fourth dielectric layer 1212, and the fourth conductive layer 1222 and the grounding member 1223 are disposed on the side of the fourth dielectric layer 1212 close to the third dielectric layer 1211. The fourth conductive layer 1222 is provided with a relief groove 12221 corresponding to the grounding member 1223.

[0122] The fourth conductive layer 1222 is provided with a relief groove 12221 corresponding to the grounding member 1223, which facilitates the installation of the grounding member 1223 and makes reasonable use of its space.

[0123] According to some embodiments of the present invention, the second power feeding layer 122 further includes: a plurality of second conductive pillars 1224, which are electrically connected to the third conductive layer 1221 and the fourth conductive layer 1222 respectively, and the plurality of second conductive pillars 1224 are spaced apart in the length direction of the third conductive layer 1221.

[0124] The multiple second conductive posts 1224 are electrically connected to the third conductive layer 1221 and the fourth conductive layer 1222 respectively. This allows the third conductive layer 1221 to be electrically connected to the fourth conductive layer 1222 through the second conductive posts 1224. Thus, the third conductive layer 1221, which forms a negative electrode, can also make the fourth conductive layer 1222 form a negative electrode, thereby making the third conductive layer 1221 and the fourth conductive layer 1222 a whole.

[0125] Furthermore, multiple second conductive posts 1224 are provided, and the multiple second conductive posts 1224 are spaced apart in the length direction of the third conductive layer 1221, so that the electrical connection between the third conductive layer 1221 and the fourth conductive layer 1222 can be more stable.

[0126] According to some embodiments of the present invention, the first feed layer 112 and the second feed layer 122 are symmetrical about the first feed output terminal 22 along the length of the coaxial line 30, so that the direction of the maximum power value of the antenna pattern can be close to the horizontal direction.

[0127] The differential feed line formed by the first feed layer 112 and the second feed layer 122 is symmetrical about the first feed output terminal 22 along the length of the coaxial line 30. This allows the tilt angle of the maximum power of the radiation pattern to be adjusted, so that the direction of the maximum power value of the antenna radiation pattern can be made closer to the horizontal direction.

[0128] The antenna 200 according to a second aspect of the present invention includes: a pair of vibrators 43 and a feeding structure 100 for the antenna of the above embodiment, wherein the pair of vibrators 43 are electrically connected to the circuit board assembly 10.

[0129] The vibrator pair 43 is electrically connected to the circuit board assembly 10, allowing the differential signal generated by the circuit board assembly 10 to drive the vibrator pair 43. The feed end is located at one end of the cylindrical antenna 200, extending into the circuit board via a coaxial cable 30. The signal then passes through a balun to form a differential signal, which is split into two equal paths. These two differential signals feed the vibrator pair 43 in a parallel-feed manner. Using a parallel-feed method to drive the antenna vibrator pair 43 ensures that the radiation pattern is symmetrical in the horizontal direction. Since the distance from the feed point of each vibrator 41 in each pair of antennas 200 to the center line of the vibrator 41 is the same, it makes it easier for the radiation pattern to be symmetrical in the horizontal direction when the antenna 200 is placed vertically.

[0130] According to some embodiments of the present invention, the oscillator pair 43 is sleeved on the outer periphery of the circuit board assembly 10 and spaced apart along the length direction of the circuit board assembly 10. The oscillator pair 43 is electrically connected to the circuit board assembly 10 respectively. In this way, the oscillator pair 43 can play the role of adjusting the bandwidth.

[0131] According to some embodiments of this invention, the vibrator pairs 43 are arranged in an array along the length of the circuit board assembly 10. This allows energy to be concentrated in a specific direction, thereby improving the overall gain of the antenna 200.

[0132] According to some embodiments of the present invention, the oscillator pair 43 includes a plurality of oscillators 41, which are spaced apart along the length of the circuit board assembly 10.

[0133] The arrangement of multiple oscillators 41 allows for two or more pairs of oscillators 43, thereby further improving the control over the high-frequency operating band.

[0134] According to some embodiments of the present invention, the oscillator 41 is constructed in a circular shape.

[0135] The oscillator 41 is designed in a ring shape, which not only ensures the coaxiality of the installation, but also further reduces the non-circularity of the radiation pattern of the oscillator 41.

[0136] Furthermore, the ring-shaped oscillator can be spliced ​​into a ring shape, which facilitates installation. For example, the oscillator is composed of multiple arc-shaped plates arranged along its circumference.

[0137] According to some embodiments of the present invention, the oscillator 41 is a multi-layered nested annular oscillator.

[0138] Among them, the multi-layered nested ring-shaped oscillators can allow coverage of a wider frequency range, and the rings of different sizes can be optimized for different resonant frequencies, thus enabling the entire antenna 200 to operate over a wider frequency band.

[0139] Moreover, the multi-layered nested annular oscillators are spatially coupled, and due to the spatial coupling effect between different layers, they can operate in different frequency ranges. This allows the oscillator 41 to control both the low-frequency and high-frequency operating bands, thus achieving a relatively controllable dual-frequency operating mode.

[0140] According to some embodiments of the present invention, the length of the inner layer 411 of the oscillator 41 is greater than or equal to the length of the outer layer 412.

[0141] When the length of the inner layer 411 of the vibrator 41 is greater than the length of the outer layer 412, the antenna 22 can have multi-frequency function. When the length of the inner layer 411 of the vibrator 41 is equal to the length of the outer layer 412, the horizontal gain of the antenna 200 can be increased.

[0142] Furthermore, when the requirements for non-roundness are not high, the oscillator 41 can be a printed oscillator on the PCB or a multilayer printed oscillator.

[0143] According to some embodiments of the present invention, a fifth dielectric layer 52 is provided between the inner and outer layers of the oscillator 41, and the dielectric layer 52 is sleeved on the outer periphery of the inner layer 411.

[0144] The fifth dielectric layer 52 can be filled with a dielectric material with a dielectric constant greater than 1, thus serving a supporting function and optimizing the radiation pattern. The fifth dielectric layer 52 can control the bandwidth or operating frequency band, and it also protects the vibrator 41. As a dual-band antenna 200, it requires higher gain in the relatively high-frequency (5.8GHz) band, and the added fifth dielectric layer 52 can further increase the high-frequency gain. Therefore, by adding the fifth dielectric layer 52, the performance of the omnidirectional antenna 200 can be enhanced.

[0145] According to another embodiment of the present invention, a sixth dielectric layer 51 is provided on the outer layer 412 of the oscillator 41. The sixth dielectric layer 51 is sleeved on the outer layer 412 of the oscillator 41, so that the sixth dielectric layer 51 can fix the oscillator 41 or adjust the direction pattern.

[0146] The fifth dielectric layer 52 can be a Teflon layer or other non-conductive material layer. If the dielectric constant is greater than 1, the radiation parameters of the antenna 200 can also be adjusted. The sixth dielectric layer 51 can also be a non-conductive material layer with a dielectric constant greater than 1.

[0147] According to some embodiments of the present invention, the oscillator pair 43 further includes: a plurality of oscillator seats 42, the oscillator seats 42 being disposed between the oscillator 41 and the circuit board, and the oscillator 41 being electrically connected to the circuit board assembly 10 through the oscillator seats 42.

[0148] Specifically, two vibrators 41 can form a vibrator pair 43. The two vibrators 41 are set separately and have a gap. The vibrator base 42 is set between the vibrator 41 and the circuit board assembly 10. The vibrator base 42 can not only play a role in conducting electricity, but also adjust the frequency of the vibrator 41 of the antenna 200 by adjusting the size and position of the vibrator base 42. For example, the vibrator base 42 can be set close to the gap between the two vibrators 41. This can make the frequency bandwidth wider.

[0149] Furthermore, by changing the length of the vibrator 41, the frequency of the vibrator 41 of the antenna 200 can also be changed. Not only can dual-frequency operation be achieved, but the operating frequency of the vibrator 41 of the antenna 200 can also be adjusted to 2.4–2.4835 GHz and 5.725–5.85 GHz.

[0150] For example, the horizontal gain in the 2.4GHz band is above 4.9dBi, and the non-circularity is less than 0.1dB; the horizontal gain in the 5.8GHz band is greater than 7dBi, the non-circularity is less than 0.2dB, and the overall efficiency is greater than 80%. With the mounting base and housing, the size can be less than 160mm, for example, 150mm.

[0151] According to some embodiments of the present invention, one of the oscillator pairs 43 is electrically connected to the first conductive layer 1121 through the oscillator base 42, which can make the circuit connection between the oscillator pair 43 and the first conductive layer 1121 more stable. The other of the oscillator pairs 43 is electrically connected to the third conductive layer 1221 through the oscillator base 42, which can make the circuit connection between the oscillator pair 43 and the third conductive layer 1221 more stable.

[0152] According to some embodiments of this utility model, at least two oscillators 41 are connected symmetrically relative to the first power supply output terminal, thus achieving the effect of parallel power supply to the oscillators 41.

[0153] According to some embodiments of this utility model, the oscillator base 42 is a metal base, which can serve to conduct electricity and adjust the bandwidth.

[0154] The vehicle according to a third aspect of the present invention includes: the antenna 200 of the above embodiment.

[0155] In the above embodiment, the antenna 200 is a cylindrical antenna 200, operating in dual-band frequencies, specifically the 2.4GHz and 5.8GHz bands of Wi-Fi, with maximum gain in the horizontal direction. The antenna 200 in the above embodiment may omit the dielectric layer 50, and the diameters of the multiple vibrators 41 can be varied. Multiple vibrator pairs 43 can also be provided. The vibrators 41, vibrator bases 42, and dielectric layer 50 in the antenna 200 can all be made of metal.

[0156] When the antenna 200 of the above embodiment is installed on the roof, the influence of the roof mounting surface on the antenna 200 radiation pattern can be reduced. If the roof mounting surface is a metal surface, since there is no signal on it, the metal surface and the ground are of the same polarity, regardless of whether they are connected to ground. For the positive and negative poles in the differential signal, the positive pole is not the same polarity as the ground, and the negative pole is not the same polarity as the ground, so the influence of the mounting surface on electromagnetic radiation is relatively small.

[0157] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0158] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0159] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0160] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A feeding structure for an antenna, characterized in that, include: Circuit board assembly (10); return loss adjustment element (20), the return loss adjustment element (20) is disposed in the circuit board assembly (10); coaxial line (30), the coaxial line (30) is located in the central region within the circuit board assembly (10), the coaxial line (30) is electrically connected to the circuit board assembly (10) and the return loss adjustment element (20) respectively to form two symmetrical differential signals to drive multiple oscillator pairs (43).

2. The antenna feeding structure according to claim 1, characterized in that, The coaxial cable (30) has a first power output terminal (22) and a second power output terminal (23). The first power output terminal (22) is electrically connected to a part of the circuit board assembly (10) and the return loss adjustment member (20), respectively. The second power output terminal (23) is electrically connected to another part of the circuit board assembly (10), so that the signal input to the coaxial cable (30) is converted into a differential signal and transmitted to the circuit board assembly (10).

3. The antenna feeding structure according to claim 2, characterized in that, The circuit board assembly (10) includes: a first circuit board (11), which is used to transmit one pole of a differential signal; a second circuit board (12), which is stacked with the first circuit board (11) and is used to transmit the other pole of a differential signal; wherein, the coaxial line (30) is located at the center of the first circuit board (11) and the second circuit board (12), and the first power supply output terminal (22) is electrically connected to the first circuit board (11) and the return loss adjustment component (20) respectively.

4. The antenna feeding structure according to claim 3, characterized in that, The first circuit board is provided with a first power supply layer (112), and the second circuit board is provided with a second power supply layer (122). The shape of the first power supply layer (112) and the shape of the second power supply layer are symmetrical with respect to the center of the circuit board assembly (10) to achieve minimal signal leakage.

5. The antenna feeding structure according to claim 4, characterized in that, An electrically accommodating space is formed between the first feed layer (112) and the second feed layer (122) to accommodate the coaxial line (30).

6. The antenna feeding structure according to claim 3, characterized in that, Both the first circuit board (11) and the second circuit board (12) are provided with wire grooves (13), and the coaxial cable (30) is disposed in the wire grooves (13).

7. The antenna feeding structure according to claim 4, characterized in that, Both the first feed layer (112) and the second feed layer (122) are multilayered to occupy the minimum volume while meeting specific impedance requirements.

8. The antenna feeding structure according to claim 7, characterized in that, The first power supply layer (112) includes: a first conductive layer (1121); a second conductive layer (1122), the first conductive layer (1121) and the second conductive layer (1122) are electrically connected and spaced apart in the thickness direction of the first circuit board (11), and the first power supply output terminal (22) is electrically connected to the first conductive layer (1121) and the return loss adjustment member (20) respectively.

9. The antenna feeding structure according to claim 8, characterized in that, The first feeding layer (112) further includes: a plurality of first conductive pillars (1123), the plurality of first conductive pillars (1123) being electrically connected to the first conductive layer (1121) and the second conductive layer (1122) respectively, and the plurality of first conductive pillars (1123) being spaced apart along the length direction of the first conductive layer (1121).

10. The antenna feeding structure according to claim 8, characterized in that, The first circuit board (11) further includes: a first substrate (111), the first power supply layer (112) and the return loss adjustment member (20) are spaced apart on the first substrate (111), the return loss adjustment member (20) and the first conductive layer (1121) are spaced apart in the thickness direction of the first substrate (111), and the return loss adjustment member (20) and the second conductive layer (1122) are spaced apart in the width direction of the first substrate (111).

11. The antenna feeding structure according to claim 10, characterized in that, The first substrate (111) includes: a first dielectric layer (1112); a second dielectric layer (1113), wherein the first dielectric layer (1112) and the second dielectric layer (1113) are stacked; wherein the first conductive layer (1121) is disposed on the side of the first dielectric layer (1112) away from the second dielectric layer (1113), and the second conductive layer (1122) and the return loss adjustment member (20) are disposed on the side of the second dielectric layer (1113) close to the first dielectric layer (1112).

12. The antenna feeding structure according to claim 7, characterized in that, The second power supply layer (122) includes: a third conductive layer (1221); a fourth conductive layer (1222), the third conductive layer (1221) and the fourth conductive layer (1222) are electrically connected and spaced apart in the thickness direction of the second circuit board, and the second power supply output terminal (23) is electrically connected to the third conductive layer (1221).

13. The antenna feeding structure according to claim 12, characterized in that, The second feeding layer (122) further includes a plurality of second conductive pillars (1224), which are electrically connected to the third conductive layer (1221) and the fourth conductive layer (1222) respectively, and the plurality of second conductive pillars (1224) are spaced apart in the length direction of the third conductive layer (1221).

14. The antenna feeding structure according to claim 13, characterized in that, The second circuit board (12) further includes: a second substrate (121), which is stacked with the first circuit board (11), and a second power supply layer (122) is disposed on the second substrate (121), and the second power supply output terminal (23) is electrically connected to the second power supply layer (122).

15. The antenna feeding structure according to claim 14, characterized in that, The second substrate (121) includes: a third dielectric layer (1211); a fourth dielectric layer (1212), wherein the third dielectric layer (1211) and the fourth dielectric layer (1212) are stacked; wherein the third conductive layer (1221) is disposed on the side of the third dielectric layer (1211) away from the fourth dielectric layer (1212), and the fourth conductive layer (1222) is disposed on the side of the fourth dielectric layer (1212) close to the third dielectric layer (1211).

16. The antenna feeding structure according to claim 4, characterized in that, The first feed layer (112) and the second feed layer (122) are symmetrical about the first feed output terminal (22) along the length of the coaxial line (30) so that the direction of the maximum power value of the antenna pattern approaches the horizontal direction.

17. An antenna, characterized in that, include: The oscillator pair (43) is electrically connected to the circuit board assembly (10); The antenna feeding structure (100) according to any one of claims 1-16.

18. The antenna according to claim 17, characterized in that, The oscillator pair (43) is used for differential signal driving. The oscillator pair (43) is sleeved on the outer periphery of the circuit board assembly (10) and spaced apart along the length direction of the circuit board assembly (10).

19. The antenna according to claim 18, characterized in that, The oscillator pairs (43) are arranged in an array along the length of the circuit board assembly (10).

20. The antenna according to claim 19, characterized in that, The oscillator pair (43) includes a plurality of oscillators (41), which are spaced apart along the length of the circuit board assembly (10).

21. The antenna according to claim 20, characterized in that, The oscillator (41) is constructed in a circular ring shape.

22. The antenna according to claim 21, characterized in that, The oscillator (41) is a multi-layered nested annular oscillator.

23. The antenna according to claim 22, characterized in that, The length of the inner layer (411) of the oscillator (41) is greater than or equal to the length of the outer layer (412).

24. The antenna according to claim 20, characterized in that, A fifth dielectric layer (52) is provided between the inner layer (411) and the outer layer (412) of the oscillator (41), and the fifth dielectric layer (52) is sleeved on the outer periphery of the inner layer (411).

25. The antenna according to claim 24, characterized in that, The outer layer (412) of the oscillator (41) is provided with a sixth dielectric layer (51), which is used to fix the outer layer (412) of the oscillator (41) or adjust the direction pattern.

26. The antenna according to claim 20, characterized in that, The oscillator pair (43) further includes: a plurality of oscillator seats (42), the oscillator seats (42) being disposed between the oscillator (41) and the circuit board assembly (10), the oscillator (41) being electrically connected to the circuit board assembly (10) through the oscillator seats (42).

27. The antenna according to claim 26, characterized in that, One of the plurality of oscillator mounts (42) is electrically connected to the first conductive layer (1121), and another of the plurality of oscillator mounts (42) is electrically connected to the third conductive layer (1221).

28. A vehicle, characterized in that, include: The antenna (200) according to any one of claims 17-27.

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