A vehicle antenna

Abstract

The utility model discloses a vehicle antenna, including base, the inside bottom surface fixed mounting of base has coaxial cable connector, the top of coaxial cable connector is connected with sealing washer, the inside bottom surface fixed mounting of base has GNSS antenna module, shield, set up in the inner wall position of base, the top fixed mounting of GNSS antenna module has ceramic antenna shield, the inside screw thread connection of GNSS antenna module has upper fastening screw, the top surface of GNSS antenna module still has the sealing washer that clings, the top fixed mounting of base has antenna cover, the inside periphery screw thread connection of base has lower fastening screw, the bottom surface of base is connected with rubber pad and metal washer in proper order, adopt modularization design, GNSS antenna module can replace alone, can receive the satellite signal from the horizon nearby (low elevation angle) better, suppresses the useless reflection signal from the ground simultaneously, utilizes the cooperation of sealing washer, sealing washer and rubber pad, realizes double waterproof design, improves the protection level of GNSS antenna module.

Description

Technical Field

[0001] This utility model relates to the field of satellite navigation antenna technology, specifically a vehicle-mounted antenna. Background Technology

[0002] GNSS vehicle-mounted antennas are key components for receiving signals from global navigation satellite systems and are widely used in vehicle navigation, positioning, and timing. GNSS antennas are the core component for signal reception in satellite navigation systems. Through multi-constellation signal compatibility, centimeter-level positioning technology, and anti-interference design, they provide support for high-precision positioning in complex environments. Tiangong Measurement & Control's GNSS high-precision antenna can simultaneously track satellite signals from BDS, GPS, and GLONASS, and uses RTK technology to achieve centimeter-level positioning. It is suitable for high-dynamic scenarios such as surveying and mapping and autonomous driving. This device is compact in size to meet space-sensitive requirements and expands the range of positioning and orientation applications through dual-antenna output functionality.

[0003] In existing technologies, GNSS antennas mostly adopt fixed installation or simple spring structures, which have the following problems: the antenna and spring structure are mostly integrated designs, and partial damage requires replacement of the whole; the waterproof performance is insufficient, affecting the service life of the circuit board; the connection method is simple, which is not conducive to quick replacement and maintenance; the impact resistance is limited, and frequent collisions can easily lead to performance degradation.

[0004] Therefore, a vehicle-mounted antenna was proposed to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this utility model is to provide a vehicle-mounted antenna to solve the problems in the existing technology where GNSS antennas and spring structures are mostly integrated designs, requiring replacement of the whole unit when damaged in a part, and having limited impact resistance, which can easily lead to performance degradation due to frequent collisions.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vehicle-mounted antenna, including a base, wherein a coaxial cable connector is fixedly installed on the inner bottom surface of the base, and a sealing ring is connected to the top of the coaxial cable connector; A GNSS antenna module is fixedly installed on the inner bottom surface of the base; A shielding cover is installed on the inner wall of the base; Also includes: A ceramic antenna cover is fixedly installed on the top of the GNSS antenna module. The internal thread of the GNSS antenna module is connected with a fastening screw. A sealing gasket is also attached to the top surface of the GNSS antenna module. An antenna cover is fixedly installed on the top of the base. The base has a threaded connection around its interior, with a lower fastening screw. A rubber pad and a metal washer are sequentially connected to the bottom surface of the base. A protective cover is fitted and fixed to the lower outer side of the coaxial cable connector, and a lower fastening nut is fitted to the outer side of the coaxial cable connector.

[0007] Preferably, a label part is also fixedly connected to one side of the bottom of the base, and there are no less than two lower fastening nuts, which are threadedly connected to the coaxial cable connector.

[0008] Preferably, there are no fewer than four fastening screws, and the top of the radome is arc-shaped.

[0009] Preferably, the sealing gasket is located between the base and the antenna cover, and the sealing gasket serves a sealing function.

[0010] Preferably, the sealing ring is a metric nitrile rubber O-ring with a width ranging from ten to thirteen millimeters and an inner diameter ranging from six to eight millimeters.

[0011] Preferably, the ceramic antenna cover is located on the top surface of the GNSS antenna module, and four pressure feet are provided on the outer side of the ceramic antenna cover, the pressure feet being in contact with the top surface of the GNSS antenna module.

[0012] Preferably, there are no fewer than three lower fastening screws, and the lower fastening nuts are arranged in parallel vertically.

[0013] Compared with the prior art, the beneficial effects of this utility model are that it adopts a modular design, allowing the GNSS antenna module to be replaced individually. It can better receive satellite signals from near the horizon (low elevation angle) while suppressing unwanted reflected signals from the ground. The combination of a sealing ring, sealing gasket, and rubber gasket achieves a dual waterproof design, improving the protection level of the GNSS antenna module. Specific details are as follows: 1. Adopting a modular design, the GNSS antenna module can be replaced individually. The GNSS antenna module is responsible for receiving extremely weak L-band microwave signals transmitted from GNSS satellites (such as GPS, BeiDou, GLONASS, Galileo) at high altitudes of tens of thousands of kilometers. The gain of this part of the antenna is usually not high (around a few dB). Its core design goal is to have high efficiency and good radiation mode, that is, to be able to efficiently convert electromagnetic wave signals in the air into electrical signals, and to receive satellite signals from near the horizon (low elevation angle) well, while suppressing useless reflected signals from the ground (through ground plane design). 2. In applications such as vehicle-mounted, ship-mounted, or drone-mounted devices, a long coaxial cable (several meters or even longer) may be required between the antenna and the host. The cable itself will cause significant signal attenuation (loss may reach several decibels per meter). The high gain of 40dB can completely compensate for this loss, ensuring that the signal reaching the receiving chip is still strong enough. By using the combination of sealing rings, sealing gaskets, and rubber gaskets, a dual waterproof design is achieved, improving the protection level of the GNSS antenna module. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the exploded structure of this utility model; Figure 2 This is a schematic diagram of the coaxial cable connector structure of this utility model; Figure 3 This is a schematic diagram of the lower fastening nut structure of this utility model; Figure 4 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 5 This is a schematic diagram of the structure of this utility model from a bottom view.

[0015] In the diagram: 1. Base; 2. Coaxial cable connector; 3. Sealing ring; 4. GNSS antenna module; 5. Shielding cover; 6. Ceramic antenna cover; 7. Upper fastening screw; 8. Sealing gasket; 9. Antenna cover; 10. Lower fastening screw; 11. Label section; 12. Rubber gasket; 13. Metal gasket; 14. Lower fastening nut; 15. Protective cover. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1 - Figure 5 The present invention provides a technical solution: a vehicle-mounted antenna, including a base 1, a coaxial cable connector 2 fixedly installed on the inner bottom surface of the base 1, a sealing ring 3 connected to the top of the coaxial cable connector 2, and the base 1 adopts a metal base; the coaxial cable connector 2 is a semi-rigid cable, model RG405, with a waterproof TNC female head.

[0018] The sealing ring 3 is a metric nitrile rubber O-ring with a width ranging from 10 to 13 mm and an inner diameter ranging from 6 to 8 mm. The GNSS antenna module 4 is fixedly installed on the inner bottom surface of the base 1.

[0019] The shield 5 is located on the inner wall of the base 1. The GNSS antenna module 4 is an L1256 printed circuit board assembly. The shield can with patch assembly is suitable for GNSS-L1256. The shield 5 is a patch assembly with a 48x48 mm plastic bracket.

[0020] Adopting a modular design, GNSS antenna module 4 can be replaced individually. GNSS antenna module 4 is responsible for receiving extremely weak L-band microwave signals transmitted from GNSS satellites (such as GPS, BeiDou, GLONASS, and Galileo) at high altitudes of tens of thousands of kilometers. The gain of this part of the antenna is usually not high (around a few dB). Its core design goal is to have high efficiency and good radiation mode, that is, to be able to efficiently convert electromagnetic wave signals in the air into electrical signals, and to receive satellite signals from near the horizon (low elevation angle) well, while suppressing useless reflected signals from the ground (through ground plane design).

[0021] A ceramic antenna cover 6 is fixedly installed on the top of the GNSS antenna module 4. The internal thread of the GNSS antenna module 4 is connected by a top fastening screw 7. The ceramic antenna cover 6 is a stainless steel component with an internal toothed locking washer. The top fastening screw 7 is model GPS-HL125 with a thickness of 0.045 inches. A sealing gasket 8 is also attached to the top surface of the GNSS antenna module 4. An antenna cover 9 is fixedly installed on the top of the base 1.

[0022] The ceramic antenna cover 6 is located on the top surface of the GNSS antenna module 4. Four pressure feet are provided on the outside of the ceramic antenna cover 6, which are in contact with the top surface of the GNSS antenna module 4. There are no fewer than four fastening screws 7. The top of the antenna cover 9 is arc-shaped. The sealing gasket 8 is located between the base 1 and the antenna cover 9. The sealing gasket 8 plays a sealing role. The sealing gasket 8 is a GPSL125 CL12 radar cover. The antenna cover 9 is made of stainless steel plastic threaded screws, 1 / 2 inch long.

[0023] The base 1 has a threaded connection of a lower fastening screw 10 around its inner perimeter. The bottom surface of the base 1 is connected in sequence with a rubber pad 12 and a metal washer 13. The lower outer side of the coaxial cable connector 2 is fitted with a protective cover 15. The outer side of the coaxial cable connector 2 is also fitted with a lower fastening nut 14.

[0024] In applications such as vehicle-mounted, ship-mounted, or drone-mounted devices, a long coaxial cable (several meters or even longer) may be required between the antenna and the host. The cable itself will cause significant signal attenuation (loss may reach several decibels per meter). The high gain of 40dB can completely compensate for this loss, ensuring that the signal reaching the receiving chip is still strong enough. By using the combination of sealing ring 3, sealing gasket 8 and rubber gasket 12, a dual waterproof design is achieved, improving the protection level of GNSS antenna module 4.

[0025] A label part 11 is also fixedly connected to one side of the bottom of the base 1, and there are no less than two lower fastening nuts 14, which are threadedly connected to the coaxial cable connector 2.

[0026] There shall be no fewer than three lower fastening screws 10, and the lower fastening nuts 14 shall be arranged in parallel, one above the other.

[0027] The lower fastening screw 10 is a GNSS-L125-40TNC product label; the label part 11 is a rubber washer, model 3970; the rubber pad 12 is a 304 stainless steel washer; the lower fastening nut 14 is a PVC cap with an inner diameter of 406 mm and a length of 500 mm.

[0028] Working principle: Before using this type of vehicle-mounted antenna, it is necessary to check the overall condition of the device to ensure it can function properly. Figure 1 - Figure 5 As shown, during use, the GNSS antenna module 4 is responsible for receiving extremely weak L-band microwave signals emitted by GNSS satellites (such as GPS, BeiDou, GLONASS, and Galileo) at high altitudes of tens of thousands of kilometers. After the satellite signals are captured and converted into electrical signals, they are transmitted through the coaxial cable connector 2 and subjected to radio frequency calculations, ultimately outputting position data to the vehicle system. During this process, the shield 5 and the ceramic antenna cover 6 form an electromagnetic isolation layer, blocking strong interference sources (motor, ignition system) from contaminating the transmitted signals. The sealed structure of the antenna cover 9 and the base 1 protects the internal components from vibration, impact, and temperature and humidity, ensuring long-term stable and reliable transmission of data streams in harsh vehicle environments.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vehicle-mounted antenna, comprising a base (1), wherein a coaxial cable connector (2) is fixedly mounted on the inner bottom surface of the base (1), and a sealing ring (3) is connected to the top of the coaxial cable connector (2); A GNSS antenna module (4) is fixedly installed on the inner bottom surface of the base (1). The shield (5) is located on the inner wall of the base (1); Its features are, Also includes: A ceramic antenna cover (6) is fixedly installed on the top of the GNSS antenna module (4), and a fastening screw (7) is connected to the internal thread of the GNSS antenna module (4). A sealing gasket (8) is also attached to the top surface of the GNSS antenna module (4), and an antenna cover (9) is fixedly installed on the top of the base (1). The base (1) is threaded around its interior with a lower fastening screw (10), and the bottom surface of the base (1) is sequentially connected with a rubber pad (12) and a metal washer (13). The lower outer side of the coaxial cable connector (2) is fitted with a protective cover (15), and the outer side of the coaxial cable connector (2) is also fitted with a lower fastening nut (14).

2. The vehicle-mounted antenna according to claim 1, characterized in that: A label part (11) is also fixedly connected to one side of the bottom of the base (1), and there are no less than two lower fastening nuts (14), which are threadedly connected to the coaxial cable connector (2).

3. A vehicle-mounted antenna according to claim 1, characterized in that: There are at least four upper fastening screws (7), and the top of the antenna cover (9) is arc-shaped.

4. A vehicle-mounted antenna according to claim 1, characterized in that: The sealing gasket (8) is located between the base (1) and the antenna cover (9), and the sealing gasket (8) serves a sealing function.

5. A vehicle-mounted antenna according to claim 1, characterized in that: The sealing ring (3) is a metric nitrile rubber O-ring with a width ranging from ten to thirteen millimeters and an inner diameter ranging from six to eight millimeters.

6. A vehicle-mounted antenna according to claim 1, characterized in that: The ceramic antenna cover (6) is located on the top surface of the GNSS antenna module (4). Four pressure feet are provided on the outside of the ceramic antenna cover (6), and the pressure feet are in contact with the top surface of the GNSS antenna module (4).

7. A vehicle-mounted antenna according to claim 1, characterized in that: There are at least three lower fastening screws (10), and the lower fastening nuts (14) are arranged in parallel vertically.

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