An integrated antenna

Abstract

The application discloses an integrated antenna and belongs to the technical field of vehicle-mounted communication. The integrated antenna comprises a first PCB, a second PCB and a metal support arranged between the first PCB and the second PCB, wherein a GNSS antenna and an LNA circuit thereof are arranged on the second PCB, and the rest of antennas and LNA circuits thereof are arranged on the first PCB, and the GNSS antenna is electrically connected with the first PCB through the metal support. The integrated antenna utilizes two PCBs to separate the GNSS antenna and the LNA circuit thereof from the rest of antennas and the LNA circuits thereof, avoids the problem that the area of the PCB is increased due to the integration of multiple antennas on one PCB, makes the structure of the integrated antenna more compact, and more antennas can be arranged; and the distance between the GNSS antenna and the LNA circuit thereof and the rest of antennas and the LNA circuits thereof is pulled apart through the metal support, the rest of antennas and the LNA circuits thereof are prevented from interfering with the GNSS antenna and the LNA circuit thereof, the axial ratio performance of the antenna is improved, and the circular polarization degree of the integrated antenna is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle communication technology, and in particular to an integrated antenna. Background Technology

[0002] To improve the safety and efficiency of transportation systems, it is necessary to organically combine traffic participants and the traffic environment through vehicle-mounted communication systems. Therefore, vehicle-mounted communication systems play a crucial role in traffic safety.

[0003] Currently, multiple antennas are commonly integrated onto a PCB (Printed Circuit Board) to form an in-vehicle communication system. However, integrating multiple antennas onto a single PCB presents the following problems: 1. The integration of multiple antennas increases the PCB area, making the integrated antenna structure loose. 2. The integration of multiple antennas can cause the other antennas to affect the axial ratio performance of the GNSS (Global Navigation Satellite System) antenna, resulting in significant differences in signal gain of the integrated antenna in different directions.

[0004] Therefore, there is an urgent need to provide an integrated antenna to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated antenna that solves the problems of increased PCB area and impact on the axial ratio performance of GNSS antennas caused by the integration of multiple antennas. It not only makes the structure of the integrated antenna compact, but also improves the axial ratio performance and circular polarization of the integrated antenna.

[0006] To achieve the above objectives, the following technical solution is provided:

[0007] An integrated antenna, comprising:

[0008] First PCB;

[0009] The metal bracket has a hollow frame structure and is mounted on the first PCB.

[0010] The second PCB is disposed at the top of the metal bracket;

[0011] The GNSS antenna and its LNA circuit are mounted on the second PCB; the other antennas and their LNA circuits are mounted on the first PCB, and the GNSS antenna is electrically connected to the first PCB through the metal bracket.

[0012] As an alternative to the above integrated antenna, the top end of the metal support is provided with a first protrusion, the first protrusion is bent outward to form a first mounting plate, the end of the second PCB extends outward to form a second mounting plate, and the first mounting plate is connected to the second mounting plate by a bolt structure.

[0013] As an alternative to the above integrated antenna, the end of the second PCB is provided with a positioning groove, the top end of the metal support extends outward in the vertical direction to form a positioning protrusion, and the positioning protrusion can be arranged in the positioning groove.

[0014] As an alternative to the above integrated antenna, the bottom end of the metal support extends outward in the vertical direction to form a connecting piece, the first PCB is provided with a metalized hole, and the connecting piece can be inserted into the metalized hole.

[0015] As an alternative to the above integrated antenna, the bottom end of the metal support is provided with a second protrusion, the second protrusion is bent outward to form a third mounting plate, and the third mounting plate is connected to the first PCB by a bolt structure.

[0016] As an alternative to the above integrated antenna, a glue layer is arranged between the second PCB and the GNSS antenna.

[0017] As an alternative to the above integrated antenna, a through hole is arranged on the GNSS antenna, a PIN pin passes through the through hole and is electrically connected to the LNA circuit of the GNSS antenna on the second PCB.

[0018] As an alternative to the above integrated antenna, a wire is arranged between the first PCB and the second PCB, for connecting the LNA circuit of the GNSS antenna and the module of the GNSS antenna arranged on the first PCB.

[0019] As an alternative to the integrated antenna, a fixing member is arranged on the first PCB and the second PCB, and the fixing member is used to clamp the wire.

[0020] As an alternative to the above integrated antenna, a containing cavity is formed in the metal support, and the LNA circuit of the GNSS antenna is arranged in the containing cavity.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] The integrated antenna of the present application comprises a first PCB, a second PCB and a metal support arranged between the first PCB and the second PCB, wherein the GNSS antenna and its LNA circuit are arranged on the second PCB, the rest of the antennas and their LNA circuits are arranged on the first PCB, and the GNSS antenna is electrically connected with the first PCB through the metal support. The above integrated antenna uses two PCBs to separate the GNSS antenna and its LNA circuit from the rest of the antennas and their LNA circuits, avoiding the problem of increasing the area of the PCB caused by integrating multiple antennas on one PCB, making the structure of the integrated antenna more compact; and the distance between the GNSS antenna and its LNA circuit and the rest of the antennas and their LNA circuits is pulled apart through the metal support, avoiding the interference of the rest of the antennas and their LNA circuits on the GNSS antenna and its LNA circuit, improving the axial ratio performance of the integrated antenna and improving the circular polarization degree of the integrated antenna. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic diagram of the integrated antenna in the embodiment of the present application;

[0024] Figure 2 FIG. 2 is an enlarged view of position A in FIG. 1; Figure 1

[0025] Figure 3 FIG. 3 is a structural schematic diagram of the metal support in the embodiment of the present application;

[0026] Figure 4 FIG. 4 is a structural schematic diagram of the second PCB in the embodiment of the present application.

[0027] Reference signs:

[0028] 1, first PCB; 2, metal support; 3, second PCB; 4, GNSS antenna; 5, wire;

[0029] 11, fixing part; 111, first arc-shaped plate; 112, second arc-shaped plate; 113, connecting plate;

[0030] 21, first mounting plate; 211, screw structure; 22, third mounting plate; 23, positioning protrusion; 24, connecting part;

[0031] 31, second mounting plate; 32, positioning groove;

[0032] 41, through hole; 42, PIN. DETAILED DESCRIPTION

[0033] ​In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application generally described and shown in the drawings can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0035] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0037] In the description of the present application, it should also be noted that, unless otherwise specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "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. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] like Figures 1-4 As shown, this embodiment provides an integrated antenna, which includes a first PCB1, a second PCB3, and a metal bracket 2 disposed between the first PCB1 and the second PCB3. The GNSS antenna 4 and its LNA circuit are disposed on the second PCB3, while the other antennas and their LNA circuits are disposed on the first PCB1. The GNSS antenna 4 is electrically connected to the first PCB1 via the metal bracket 2. This integrated antenna utilizes two PCBs to separate the GNSS antenna 4 and its LNA circuit from the other antennas and their LNA circuits, avoiding the problem of increased PCB area caused by integrating multiple antennas onto a single PCB, resulting in a compact structure. Furthermore, the metal bracket 2 increases the distance between the GNSS antenna 4 and its LNA circuit and the other antennas and their LNA circuits, preventing interference from the other antennas and their LNA circuits, improving the axial ratio performance of the integrated antenna, and enhancing its circular polarization.

[0041] Experiments show that when there is no metal support 2, the maximum value of the axial ratio of the integrated antenna in the range of 0°-30° is 9.8 dB at a frequency of 1176 MHz, and the maximum value of the axial ratio of the integrated antenna in the range of 0°-30° is 6.1 dB at a frequency of 1576 MHz. When the height of the metal support 2 is 5 mm, the maximum value of the axial ratio of the integrated antenna in the range of 0°-30° is 8.6 dB, and the maximum value of the axial ratio of the integrated antenna in the range of 0°-30° is 5.1 dB at a frequency of 1576 MHz. When the height of the metal support 2 is 10 mm, the maximum value of the axial ratio of the integrated antenna in the range of 0°-30° is 6.4 dB, and the maximum value of the axial ratio of the integrated antenna in the range of 0°-30° is 4.0 dB at a frequency of 1576 MHz. When the height of the metal support 2 is 15 mm, the maximum value of the axial ratio of the integrated antenna in the range of 0°-30° is 4.9 dB, and the maximum value of the axial ratio of the integrated antenna in the range of 0°-30° is 3.2 dB at a frequency of 1576 MHz. When the height of the metal support 2 is 20 mm, the maximum value of the axial ratio of the integrated antenna in the range of 0°-30° is 4.1 dB, and the maximum value of the axial ratio of the integrated antenna in the range of 0°-30° is 3.9 dB at a frequency of 1576 MHz. As can be seen from the above, the circular polarization degree of the integrated antenna is related to the height of the metal support 2, and the higher the height of the metal support 2, the higher the circular polarization degree of the integrated antenna. In this embodiment, the height of the metal support 2 is 18.4 mm.

[0042] Since the metal support 2 is a hollow frame structure, further, a containing cavity is formed inside the metal support 2, and the LNA circuit of the GNSS antenna 4 is arranged in the containing cavity, so that the metal support 2 is used as a shielding cover for the LNA circuit of the GNSS antenna 4, not only reducing the manufacturing cost, but also further isolating the interference of the LNA circuits of the remaining antennas on the LNA circuit of the GNSS antenna 4, and improving the circular polarization degree of the integrated antenna.

[0043] In order to realize the stability of the connection between the GNSS antenna 4 and the second PCB 3, further optionally, an adhesive layer is arranged between the second PCB 3 and the GNSS antenna 4 to realize the gluing of the second PCB 3 and the GNSS antenna 4. Further optionally, a through hole 41 is arranged on the GNSS antenna 4, and a PIN pin 42 passes through the through hole 41 and is electrically connected to the LNA circuit of the GNSS antenna 4 on the second PCB 3. And further, a wire 5 is arranged between the first PCB 1 and the second PCB 3, which is used to connect the LNA circuit of the GNSS antenna 4 and the module of the GNSS antenna 4 arranged on the first PCB 1, so as to realize the conduction of the internal signal of the GNSS antenna 4. Further optionally, a fixing member 11 is arranged on each of the first PCB 1 and the second PCB 3, and the fixing member 11 is used to clamp the wire 5 to realize the fixation of the wire 5 and avoid the influence of the shaking of the wire 5 on the signal gain of the integrated antenna. Specifically, the fixing member 11 is welded to the first PCB 1 and the second PCB 3 to improve the stability of the installation of the fixing member 11 on the first PCB 1 and the second PCB 3. The fixing member 11 includes a first arc-shaped plate 111, a second arc-shaped plate 112 and a connecting plate 113, the connecting plate 113 is used to connect the first arc-shaped plate 111 and the second arc-shaped plate 112 to form a containing cavity, and the cavity opening of the containing cavity is contracted to limit the displacement of the wire 5 in the vertical direction to avoid the wire 5 from being separated from the fixing member 11. The first arc-shaped plate 111, the second arc-shaped plate 112 and the connecting plate 113 are integrally formed to reduce the processing difficulty. And the first arc-shaped plate 111 and the second arc-shaped plate 112 are elastic sheets, when the wire 5 moves inward from the cavity opening of the containing cavity, the wire 5 gives the pressure to make the first arc-shaped plate 111 and the second arc-shaped plate 112 relatively far away to expand the cavity opening of the containing cavity, so as to facilitate the wire 5 to move inward through the cavity opening of the containing cavity. The pressure received by the first arc-shaped plate 111 and the second arc-shaped plate 112 makes the first arc-shaped plate 111 and the second arc-shaped plate 112 have the elastic force that makes them have the movement trend of relatively close to each other, when the wire 5 is completely placed in the containing cavity, the first arc-shaped plate 111 and the second arc-shaped plate 112 lose the extrusion pressure and relatively close to each other under the action of the elastic force to make the cavity opening of the containing cavity contract to limit the movement of the wire 5.

[0044] Further, in the embodiment, the top end of the metal bracket 2 is provided with a first protrusion, the first protrusion is bent outward to form a first mounting plate 21, the end of the second PCB 3 extends outward to form a second mounting plate 31, the first mounting plate 21 and the second mounting plate 31 are connected through a bolt structure 211 to realize the connection of the second PCB 3 and the metal bracket 2. Further optionally, the first mounting plate 21 is provided with two, the two first mounting plates 21 are arranged on the diagonal lines of the metal bracket 2 to improve the stability of the connection of the metal bracket 2 and the second PCB 3. Further, the second mounting plate 31 is a copper plate to facilitate good electrical contact between the second PCB 3 and the metal bracket 2. In other embodiments, the first mounting plate 21 and the second mounting plate 31 can also be connected by welding, clamping or metal spring etc. connection mode, which is not limited here.

[0045] In order to ensure the accuracy of the connection of the metal bracket 2 and the second PCB 3, further, the end of the second PCB 3 is provided with a positioning groove 32, the top end of the metal bracket 2 extends outward along the vertical direction to form a positioning protrusion 23, the positioning protrusion 23 can be arranged in the positioning groove 32 to realize the positioning of the metal bracket 2 and the second PCB 3 when connected.

[0046] Further optionally, in the embodiment, the bottom end of the metal bracket 2 is provided with a second protrusion, the second protrusion is bent outward to form a third mounting plate 22, the third mounting plate 22 and the first PCB 1 are connected through the bolt structure 211 to realize the connection of the metal bracket 2 and the first PCB 1. Further optionally, the third mounting plate 22 and the first mounting plate 21 correspond one by one, each third mounting plate 22 is staggered with the corresponding first mounting plate 21 to improve the stability of the connection of the metal bracket 2 and the first PCB 1. In other embodiments, the first PCB 1 and the third mounting plate 22 can also be connected by welding, clamping or metal spring etc. connection mode, which is not limited here.

[0047] Further optionally, the bottom end of the metal bracket 2 extends outward along the vertical direction to form a connecting piece 24, the first PCB 1 is provided with a metalized hole, the connecting piece 24 can be inserted into the metalized hole, on the one hand, the connection and positioning of the metal bracket 2 and the first PCB 1 are realized, on the other hand, the metal bracket 2 is grounded.

[0048] In the embodiment, the metal bracket 2 is a square hollow frame. Further, the two adjacent side walls of the metal bracket 2 are provided with a circular arc chamfer, so that the shape of the metal bracket 2 is round, avoiding scratching the staff. But in other embodiments, the structure of the metal bracket 2 can also be a circular or other symmetrical structure, which is not limited here.

[0049] Those skilled in the art will appreciate that the application described herein is not limited to the specific embodiments described, and that various modifications, rearrangements and substitutions can be made without departing from the spirit of the application. Accordingly, the application is not limited to the above embodiments, but includes other equivalents as well, and the scope of the application is determined by the appended claims.

Claims

1. An integrated antenna, characterized by, The application relates to a GNSS antenna module. The application comprises: a first PCB (1); a metal support (2) in a hollow frame structure, which is arranged on the first PCB (1); a second PCB (3), which is arranged on the top end of the metal support (2); a GNSS antenna (4) and its LNA circuit, which are arranged on the second PCB (3); the rest of the antennas and their LNA circuits are arranged on the first PCB (1), and the GNSS antenna (4) is electrically connected with the first PCB (1) through the metal support (2).

2. The integrated antenna of claim 1, wherein, The metal support (2) is used for pulling apart the distance between the GNSS antenna (4) and its LNA circuit and the rest of the antennas and their LNA circuits.

3. The integrated antenna of claim 2, wherein, The top end of the metal support (2) is provided with a first protrusion, which is outwardly bent to form a first mounting plate (21), and the end of the second PCB (3) is outwardly extended to form a second mounting plate (31), and the first mounting plate (21) is connected with the second mounting plate (31) through a bolt structure (211).

4. The integrated antenna of claim 1, wherein, The end of the second PCB (3) is provided with a positioning groove (32), and the top end of the metal support (2) is outwardly extended along the vertical direction to form a positioning protrusion (23), which can be arranged in the positioning groove (32).

5. The integrated antenna of claim 1, wherein, The bottom end of the metal support (2) is outwardly extended along the vertical direction to form a connecting piece (24), and the first PCB (1) is provided with a metalized hole, and the connecting piece (24) can be inserted into the metalized hole.

6. The integrated antenna of claim 1, wherein, The bottom end of the metal support (2) is provided with a second protrusion, which is outwardly bent to form a third mounting plate (22), and the third mounting plate (22) is connected with the first PCB (1) through the bolt structure (211).

7. The integrated antenna of claim 1, wherein, A glue layer is arranged between the second PCB (3) and the GNSS antenna (4).

8. The integrated antenna of claim 1, wherein, A through hole (41) is arranged on the GNSS antenna (4), and a PIN pin (42) passes through the through hole (41) and is electrically connected with the LNA circuit of the GNSS antenna (4) on the second PCB (3).

9. The integrated antenna of claim 8, wherein, A wire (5) is arranged between the first PCB (1) and the second PCB (3) and is used for connecting the LNA circuit of the GNSS antenna (4) with a module of the GNSS antenna (4) arranged on the first PCB (1).

10. The integrated antenna of claim 1, wherein, Fixing pieces (11) are arranged on the first PCB (1) and the second PCB (3), and the fixing pieces (11) are used for clamping the wire (5). An accommodating cavity is formed in the metal support (2), and the LNA circuit of the GNSS antenna (4) is arranged in the accommodating cavity.

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