GNSS antenna with electromagnetic shielding structure

Abstract

The utility model discloses a GNSS (Global Navigation Satellite System) antenna with an electromagnetic shielding structure. The GNSS antenna comprises a bottom shell, a surface shell, an antenna module and a metal shielding layer, the surface shell is connected with the bottom shell through a detachable structure, and a shielding cavity is enclosed between the surface shell and the bottom shell; the antenna module is arranged in the shielding cavity; the metal shielding layer is arranged on the inner side wall of the bottom shell and is positioned on the back side of the antenna module; through the structure, a good electromagnetic shielding effect can be ensured, the material cost and the overall weight of the antenna are reduced, the profile height of the antenna can be reduced, the assembly efficiency is improved, the use requirement is met, and very good practicability is achieved.

Description

Technical Field

[0001] This utility model relates to the field of antennas, and in particular to a GNSS antenna with an electromagnetic shielding structure. Background Technology

[0002] GNSS antennas are key devices for receiving signals from global navigation satellite systems, primarily used in positioning and navigation scenarios of GPS, GLONASS, Galileo, and BeiDou. Existing GNSS antennas typically consist of an upper shell, a lower shell, an antenna, and a receiving module. The antenna and receiving module are mounted on the lower shell, and the upper shell covers them. To prevent electromagnetic interference with GNSS signals or external signals, a metal shield is placed on the back of the antenna and receiving module to isolate the signal source. This type of GNSS antenna structure has the following disadvantages:

[0003] 1. The production cost is relatively high, and the weight is also relatively heavy;

[0004] 2. The metal shielding cover is also divided into an upper cover and a lower cover, which not only increases the production process, but also brings additional assembly process;

[0005] 3. The addition of a metal shield results in a higher profile for the GNSS antenna, which is not conducive to miniaturization.

[0006] Therefore, there is an urgent need for a new type of GNSS antenna with an electromagnetic shielding structure to solve the above problems. Utility Model Content

[0007] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a GNSS antenna with an electromagnetic shielding structure.

[0008] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a GNSS antenna with an electromagnetic shielding structure, including a bottom shell, a top shell, an antenna module and a metal shielding layer;

[0009] The front shell is connected to the bottom shell via a detachable structure, and the front shell and the bottom shell together form a shielding cavity.

[0010] The antenna module is assembled in the shielding cavity;

[0011] The metal shielding layer is located on the inner wall of the bottom shell and on the back side of the antenna module.

[0012] As one of the preferred embodiments of this utility model, the detachable structure includes an L-shaped buckle disposed on the outer side wall of the bottom shell and a locking strip disposed on the inner side wall of the top shell. The L-shaped buckle includes a short side arranged circumferentially along the bottom shell and a long side arranged radially along the bottom shell to form a locking groove. The locking strip can extend into the locking groove when the top shell rotates relative to the bottom shell.

[0013] As one of the preferred embodiments of this utility model, a first protrusion is provided on the inner sidewall of the long side, and a second protrusion is provided on the upper end of the card strip. The second protrusion can move from one side of the first protrusion to the other side in the card slot when the face shell rotates relative to the bottom shell, so that the card strip is confined in the card slot.

[0014] As one of the preferred embodiments of this utility model, a GNSS antenna with an electromagnetic shielding structure further includes a connector and a feed cable. The connector is mounted on the bottom shell, and one end of the feed cable is connected to the antenna module and the other end is connected to the connector.

[0015] As one of the preferred embodiments of this utility model, a first waterproof ring is provided between the connector and the bottom shell.

[0016] As one of the preferred embodiments of this utility model, a second waterproof ring is provided between the front shell and the bottom shell.

[0017] As one of the preferred embodiments of this utility model, the metal shielding layer is formed on the inner wall of the bottom shell through a local metallization process.

[0018] As one of the preferred embodiments of this utility model, the front shell and the bottom shell are made of plastic.

[0019] The beneficial effects of this utility model are as follows: A GNSS antenna with an electromagnetic shielding structure includes a bottom shell, a front shell, an antenna module, and a metal shielding layer; the front shell is connected to the bottom shell through a detachable structure, and the front shell and the bottom shell form a shielding cavity; the antenna module is assembled in the shielding cavity; the metal shielding layer is disposed on the inner side wall of the bottom shell and located on the back side of the antenna module; the above structure not only ensures a good electromagnetic shielding effect, but also reduces material costs and the overall weight of the antenna, and can also reduce the antenna's cross-sectional height and improve assembly efficiency, meeting usage requirements and having very good practicality. Attached Figure Description

[0020] 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:

[0021] Figure 1 This is a cross-sectional view of a GNSS antenna with an electromagnetic shielding structure.

[0022] Figure 2This is a partial structural diagram of a GNSS antenna with an electromagnetic shielding structure.

[0023] Figure 3 This is a schematic diagram of the bottom shell structure. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] Reference Figures 1 to 3 A GNSS antenna with an electromagnetic shielding structure includes a bottom shell 100, a front shell 200, an antenna module 300, and a metal shielding layer 400.

[0029] The front shell 200 is connected to the bottom shell 100 through a detachable structure 500, and the front shell 200 and the bottom shell 100 form a shielding cavity 210.

[0030] Antenna module 300 is installed in shielding cavity 210;

[0031] The metal shielding layer 400 is disposed on the inner wall of the bottom shell 100 and located on the back side of the antenna module 300.

[0032] In this invention, during production, the metal shielding layer 400 ( Figure 1 and Figure 3 The area shown by the grid lines in the image is formed on the inner wall of the bottom shell 100. The bottom shell 100 has an upper opening, and the front shell 200 has a lower opening. To receive electromagnetic waves, the front shell 200 is preferably made of plastic with good wave transmission. The antenna module 300 is installed on the bottom shell 100, and then the front shell 200 is connected to the bottom shell 100 through a detachable structure 500, so that the antenna module 300 is housed in the shielding cavity 210 formed by the front shell 200 and the bottom shell 100, which plays a protective role for the antenna module 300. It should be noted that Local Metallization (LPV) technology is an emerging additive manufacturing technology. The core technology is to use a high-speed jet to coat metal powder onto the surface of various substrates. The coating and the substrate are connected with high strength by molecular bonding and metallurgical bonding force to form a dense and uniform metal coating.

[0033] Reference Figure 1 In some embodiments, a GNSS antenna with an electromagnetic shielding structure further includes a connector 710 and a feed cable 720. The connector 710 is mounted on the bottom shell 100, and one end of the feed cable 720 is connected to the antenna module 300 and the other end is connected to the connector 710, for transmitting the GNSS received signal back to the main device.

[0034] Reference Figure 2In some embodiments, the detachable structure 500 includes an L-shaped buckle 510 disposed on the outer side wall of the bottom shell 100 and a retaining strip 520 disposed on the inner side wall of the front shell 200. The L-shaped buckle 510 includes a short side 511 arranged circumferentially along the bottom shell 100 and a long side 512 arranged radially along the bottom shell 100 to form a retaining groove 513. The retaining strip 520 can extend into the retaining groove 513 when the front shell 200 rotates relative to the bottom shell 100. Furthermore, a first protrusion 610 is provided on the inner side wall of the long side 512, and a second protrusion 620 is provided at the upper end of the retaining strip 520. The second protrusion 620 can extend into the retaining groove 513 when the front shell 200 rotates relative to the bottom shell 100. When the bottom shell 100 rotates, the second protrusion 620 moves from one side of the first protrusion 610 to the other side within the slot 513, so that the locking strip 520 is confined within the slot 513. During assembly, the top shell 200 is placed above the bottom shell 100, so that the locking strip 520 on the top shell 200 is aligned with the opening of the slot 513. Then the top shell 200 is rotated so that the locking strip 520 is inserted into the slot 513 until the second protrusion 620 abuts against one side of the first protrusion 610. Then the top shell 200 is rotated again so that the second protrusion 620 passes over the first protrusion 610 and enters the other side of the first protrusion 610, which can prevent the bottom shell 100 and the top shell 200 from rotating relative to each other.

[0035] Reference Figure 1 In some embodiments, a first waterproof ring 810 is provided between the connector 710 and the bottom shell 100. Furthermore, a second waterproof ring 820 is provided between the front shell 200 and the bottom shell 100. This arrangement enables the antenna module 300 to be in a sealed space, providing waterproof performance and meeting the requirements for outdoor use.

[0036] The advantages of this utility model are as follows: the above structure not only ensures good electromagnetic shielding effect, but also reduces material costs and the overall weight of the antenna. It can also reduce the antenna profile height and improve assembly efficiency to meet usage requirements. At the same time, due to the increase in the size of the shielding cavity 210, its reflected signal is weakened and it is less likely to interfere with the internal circuit. This can improve the gain, echo and other electrical performance indicators of the GNSS antenna, making it very practical.

[0037] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A GNSS antenna having an electromagnetic shielding structure, characterized by: It includes a bottom shell (100), a front shell (200), an antenna module (300), and a metal shielding layer (400); The face shell (200) is connected to the bottom shell (100) through a detachable structure (500), and the face shell (200) and the bottom shell (100) form a shielding cavity (210); The antenna module (300) is installed in the shielding cavity (210); The metal shielding layer (400) is disposed on the inner wall of the bottom shell (100) and located on the back side of the antenna module (300).

2. The GNSS antenna with electromagnetic shielding structure according to claim 1, characterized in that: The detachable structure (500) includes an L-shaped buckle (510) disposed on the outer side wall of the bottom shell (100) and a retaining strip (520) disposed on the inner side wall of the front shell (200). The L-shaped buckle (510) includes a short side (511) arranged circumferentially along the bottom shell (100) and a long side (512) arranged radially along the bottom shell (100) to form a retaining groove (513). The retaining strip (520) can extend into the retaining groove (513) when the front shell (200) rotates relative to the bottom shell (100).

3. The GNSS antenna with electromagnetic shielding structure according to claim 2, characterized in that: A first protrusion (610) is provided on the inner sidewall of the long side (512), and a second protrusion (620) is provided at the upper end of the card strip (520). The second protrusion (620) can move from one side of the first protrusion (610) to the other side in the card slot (513) when the face shell (200) rotates relative to the bottom shell (100), so that the card strip (520) is confined in the card slot (513).

4. The GNSS antenna with electromagnetic shielding structure according to claim 1, characterized in that: It also includes a connector (710) and a feed cable (720), the connector (710) being mounted on the bottom shell (100), one end of the feed cable (720) being connected to the antenna module (300) and the other end being connected to the connector (710).

5. The GNSS antenna with electromagnetic shielding structure according to claim 4, characterized in that: A first waterproof ring (810) is provided between the connector (710) and the bottom shell (100).

6. The GNSS antenna with electromagnetic shielding structure according to claim 1, characterized in that: A second waterproof ring (820) is provided between the front shell (200) and the bottom shell (100).

7. The GNSS antenna with electromagnetic shielding structure according to claim 1, characterized in that: The metal shielding layer (400) is formed on the inner wall of the bottom shell (100) by a local metallization process.

8. The GNSS antenna with electromagnetic shielding structure according to claim 1, characterized in that: The front shell (200) and the bottom shell (100) are made of plastic.

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