A vehicle-mounted high-gain GPS antenna assembly

Abstract

The utility model discloses a kind of vehicle-mounted high-gain GPS antenna components, comprising: base, the middle part of the base is inserted with radio frequency coaxial line;GPS module is set at the top of radio frequency coaxial line setting, responsible for signal processing and positioning solution;SMA connector is set at the bottom of radio frequency coaxial line;GPS ceramic antenna is set between GPS module and outer cover, for receiving satellite signal;Outer cover is installed on base by buckling, for protecting internal components.Effective in that: high-gain ceramic antenna is used, significantly improve weak signal positioning ability;Flat low wind resistance design does not affect vehicle passability;IP67 protection structure can resist long-term driving vibration;Built-in filter suppresses vehicle electromagnetic interference, realizes accurate and fast positioning.

Description

Technical Field

[0001] This utility model relates to the field of vehicle antenna technology, specifically to a vehicle-mounted high-gain GPS antenna assembly. Background Technology

[0002] The rapid development of intelligent driving and the Internet of Vehicles has led to increasingly higher requirements for vehicle positioning accuracy. Traditional GPS antennas are susceptible to multipath interference and signal attenuation in complex environments such as urban canyons and overpasses, resulting in a significant decrease in positioning accuracy. Research has revealed the following problems with commonly available vehicle GPS antennas: 1. The gain is generally low (usually <20dB), resulting in slow initial positioning and easy loss of lock in weak signal areas such as urban scenes and underground parking garages; 2. Traditional antennas mostly adopt an external cylindrical or square design, which results in high wind resistance and affects vehicle passability; 3. The packaging process is simple, but long-term vehicle vibration can easily lead to performance degradation, and the waterproof and dustproof rating is insufficient; 4. The filtering design is rudimentary and susceptible to electromagnetic interference from the engine, communication module, and other vehicle components, resulting in positioning drift. Utility Model Content

[0003] The purpose of this invention is to provide a vehicle-mounted high-gain GPS antenna assembly to address the aforementioned problems. This assembly solves the technical issues of existing technologies where the gain is generally below 20dB, resulting in slow initial positioning and easy loss of lock-on in weak signal environments; external cylindrical / square designs causing high wind resistance; simple packaging processes that are not resistant to long-term vibration; insufficient waterproof and dustproof ratings; and rudimentary filtering designs that are susceptible to positioning drift due to vehicle-mounted electromagnetic interference. Among the various technical solutions provided by this invention, the preferred solution employs a 26dB high-gain ceramic antenna, significantly improving positioning capabilities in weak signal environments; a flat, low-drag design that does not affect vehicle passability; an IP67 protection structure that can withstand long-term driving vibrations; and a built-in filter that suppresses vehicle-mounted electromagnetic interference, achieving accurate and rapid positioning. Details are provided below.

[0004] To achieve the above objectives, the present invention provides the following technical solution: The vehicle-mounted high-gain GPS antenna assembly provided by this utility model includes: A base, wherein a radio frequency coaxial cable is inserted through the middle of the base; The GPS module, located at the top of the radio frequency coaxial cable, is responsible for signal processing and positioning calculation. The SMA connector is located at the bottom of the RF coaxial cable; The GPS ceramic antenna is located between the GPS module and the outer casing and is used to receive satellite signals. The outer cover, which is fastened to the base, is used to protect the internal components.

[0005] Preferably, the outer cover has a disc-shaped structure with a smooth top surface and chamfered edges with an angle not exceeding 60°.

[0006] Preferably, a heat-shrink tubing is fitted on the outer wall of the end of the RF coaxial cable closest to the SMA connector.

[0007] Preferably, a shielding cover is fastened to the outside of the GPS module, which covers the bottom and side walls of the GPS module and the GPS ceramic antenna. An electromagnetic absorbing sheet is provided on the inside of the shielding cover, and the electromagnetic absorbing sheet corresponds to the size of the shielding cover.

[0008] Preferably, a radio frequency (RF) cable sheath is provided below the base and fitted onto the outside of the RF coaxial cable. This sheath is mainly for protecting the bent portion of the RF cable to prevent damage to the bent section.

[0009] Preferably, a product label layer is provided on the outer wall of the radio frequency coaxial cable.

[0010] Preferably, a sealing gasket is provided below the base, and a sealing ring is provided between the outer cover and the base.

[0011] Preferably, an extended cylindrical structure is provided at the center of the lower surface of the base. The bottom surface of the structure has a groove for the radio frequency cable sheath to be inserted, and the outer wall of the structure has threads. The sealing gasket is fixed to the lower surface of the base by a nut and the threads. An anti-loosening plate is provided between the nut and the sealing gasket.

[0012] The beneficial effects are: 1. The 26dB high-gain ceramic antenna design significantly enhances the ability to receive weak satellite signals, effectively solving the technical defects of slow initial positioning and easy loss of lock in weak signal scenarios such as urban canyons and underground parking garages; 2. Through the flattened shape design, the drag coefficient is greatly reduced. When installed on the roof, it does not affect the vehicle's passability, avoiding the drawbacks of traditional cylindrical / square antennas, which have high airflow resistance and affect the aerodynamics of the whole vehicle. 3. The robust packaging process can withstand long-term vehicle vibration and impact, while supporting IP67 waterproof and dustproof rating, overcoming the performance degradation and insufficient reliability problems caused by the simple packaging of traditional antennas. 4. The built-in high-quality bandpass filter, combined with a good grounding design, effectively suppresses strong electromagnetic interference from the engine, communication module, and other vehicle components, avoids positioning drift, and significantly improves positioning accuracy and stability in complex electromagnetic environments. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a front view of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is an exploded structural view of the present invention; Figure 4 This is the front view of this utility model; Figure 5 This is a cross-sectional view of the present invention.

[0015] The annotations in the attached figures are explained as follows: 1. Base; 2. RF coaxial cable; 3. SMA connector; 4. GPS module; 5. Product label layer; 6. Shielding cover; 7. Sealing ring; 8. Outer cover; 9. Screw; 10. RF cable sheath; 11. Sealing gasket; 12. Anti-loosening strip; 13. Nut; 14. GPS ceramic antenna; 15. Electromagnetic absorbing sheet; 16. Heat shrink tubing. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] See Figures 1-5 As shown, this utility model provides a vehicle-mounted high-gain GPS antenna assembly, including: The base 1 has an RF coaxial cable 2 inserted through its center. The base 1 has a disc-shaped structure with uniform radiation pattern on the horizontal plane (H plane) and gain fluctuation of <2dB in the 360° direction. It is more suitable for mobile scenarios than rectangular patches. Under the same area, the disc has a higher area utilization rate than the square patch. At the same time, the circular structure has natural advantages. Sufficient phase difference can be generated by single-point feeding + corner / eccentric design, without the need for a complex orthogonal feeding network, reducing the design difficulty. The base 1 is equipped with; GPS module 4, located at the top of RF coaxial cable 2, is responsible for signal processing and positioning calculation. After calculation based on information feedback, it outputs data such as vehicle position, speed, and time, and provides relevant information to the vehicle navigation / monitoring system via serial port or CAN bus. SMA connector 3, located at the bottom of RF coaxial cable 2, provides a highly reliable composite interface for RF signals and power for GPS / BeiDou positioning systems. Its internal screw and pin structure, RG58 wire compatibility, and vibration-resistant design make it the de facto standard for vehicle external antennas (especially mushroom-shaped GPS antennas). The GPS ceramic antenna 14 is located between the GPS module 4 and the outer casing 8 and is used to receive satellite signals. The high-gain ceramic antenna 14 GPS design gives the antenna a high dielectric constant and ultra-high stability. At the same time, the low-noise amplifier (LNA) built into the antenna provides an additional 18-26dB gain, which is directly amplified to a level that the GPS module 4 can recognize, significantly improving the signal-to-noise ratio and positioning sensitivity. It achieves strong signal reception function in a very small size, so that high-precision positioning function can be reliably integrated into various small devices. The outer cover 8 is fastened to the base 1 and is used to protect the internal components. The outer cover 88 is made of metal and has a disc-shaped structure with a smooth top surface and chamfered edges with an angle not exceeding 60°. This disc-shaped outer cover 8 design can reduce wind resistance and wind noise at high speeds. The smooth surface of the outer cover 8 can prevent dust and rainwater from adhering. The chamfered edge design of less than 60° can prevent branches and debris from scratching and pulling, buffer vibration and impact, effectively protect the internal precision components, and balance aesthetics and safety.

[0018] In another embodiment, a heat shrink tubing 16 is fitted on the outer wall of the end of the RF coaxial cable 2 near the SMA connector 3. The heat shrink tubing 16 can protect the root of the RF coaxial cable 2, prevent the root cable of the SMA connector 3 from being bent and damaged, and at the same time enhance the sealing, waterproof and dustproof effect, ensuring stable and reliable signal transmission in the vehicle environment.

[0019] In another embodiment, a shielding cover 6 is fastened to the outside of the GPS module 4. The shielding cover 6 covers the bottom and side walls of the GPS module 4 and the GPS ceramic antenna 14. An electromagnetic absorbing sheet 15 is provided on the inner side of the shielding cover 6. The electromagnetic absorbing sheet 15 corresponds to the size of the shielding cover 6. The shielding cover 6 covers the GPS module 4 and the ceramic antenna 14 to form an electromagnetic isolation barrier, blocking strong electromagnetic interference from the engine, motor and other sources in the vehicle environment, ensuring the purity of the GPS signal. In addition, the inner electromagnetic absorbing sheet 15 inside the shielding cover 6 can absorb internal stray waves, reduce noise, significantly improve positioning accuracy and anti-interference ability, and at the same time provide mechanical protection to adapt to vehicle vibration and impact.

[0020] In another embodiment, a radio frequency cable sheath 10 is provided below the base 11 and fitted on the outside of the radio frequency coaxial cable 2. The sheath is mainly for protecting the bent part of the radio frequency cable, so as to avoid damage to the bent section, disperse stress concentration in the vehicle bumpy and vibration environment, and prevent the core wire from breaking or the shielding layer from being damaged due to repeated bending of the cable; at the same time, it limits the minimum bending radius, avoids signal attenuation, and is waterproof, dustproof and anti-aging, ensuring long-term reliable connection.

[0021] In another embodiment, a product label layer 55 is provided on the outer wall of the radio frequency coaxial cable 2 for marking the products produced in the current period, so as to facilitate subsequent production traceability and maintenance.

[0022] In another embodiment, a sealing gasket 11 is provided below the base 11. The sealing gasket 11 has a disc-shaped structure and can provide a protective covering for the outside of the base 1. A sealing ring 77 is provided between the outer cover 88 and the base 11. The sealing ring 77 has a circular structure and is pressed tightly between the sealing gasket 11 and the sealing ring 77. The sealing ring 77 is made of neoprene rubber material. The sealing gasket 11 is a medium-density closed-cell gasket. The combination of the sealing gasket 11 and the sealing ring 7 can improve the overall sealing effect of the antenna assembly, reduce external influences in the usage environment, and extend the service life of the equipment.

[0023] In another embodiment, an extended cylindrical structure is provided at the center of the lower surface of the base 11. The bottom surface of the structure has a groove for the RF cable sheath 10 to be inserted, which can ensure that the RF coaxial cable 2 is inserted into the groove for positioning and prevent the RF coaxial cable 2 from moving during use, thus ensuring the stability of the cable during use. The outer wall of the structure is threaded, and the sealing gasket 11 is fixed to the lower surface of the base 11 by the threaded engagement of the nut 13. An anti-loosening plate 12 is provided between the nut 13 and the sealing gasket 11. The installation and fixation are achieved by tightening the nut 13 in conjunction with the anti-loosening plate 12, thus ensuring the stability of the antenna components during installation.

[0024] In use, satellite signals are captured by GPS ceramic antenna 14 and converted into electrical signals, which are then transmitted to SMA connector 3 via radio frequency coaxial cable 2. The SMA connector 3 then transmits the signals to GPS module 4 for radio frequency calculation, and finally outputs the location data to the vehicle system. During this process, shielding cover 6 and electromagnetic absorbing sheet 15 form an electromagnetic isolation layer to block strong interference sources (motor, ignition system) from contaminating the transmitted signals. The sealed structure of outer cover 8 and base 1 protects the internal links from vibration, impact and temperature and humidity, ensuring long-term stable and reliable transmission of data streams in harsh vehicle environments.

[0025] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A vehicle-mounted high-gain GPS antenna assembly, characterized in that: include: A base (1) has a radio frequency coaxial cable (2) inserted through the middle of the base (1); The GPS module (4) is set at the top of the radio frequency coaxial cable (2) and is responsible for signal processing and positioning calculation. The SMA connector (3) is located at the bottom of the RF coaxial cable (2); The GPS ceramic antenna (14) is located between the GPS module (4) and the outer casing (8) and is used to receive satellite signals; The outer cover (8) is fastened to the base (1) to protect the internal components.

2. The vehicle-mounted high-gain GPS antenna assembly according to claim 1, characterized in that: The outer cover (8) is a disc-shaped structure with a smooth top surface and chamfered edges with an angle not exceeding 60°.

3. The vehicle-mounted high-gain GPS antenna assembly according to claim 1, characterized in that: The outer wall of the radio frequency coaxial cable (2) near the SMA connector (3) is fitted with a heat shrink tubing (16).

4. The vehicle-mounted high-gain GPS antenna assembly according to claim 1, characterized in that: A shield (6) is fastened to the outside of the GPS module (4). The shield (6) covers the bottom and side walls of the GPS module (4) and the GPS ceramic antenna (14). An electromagnetic absorbing sheet (15) is provided on the inside of the shield (6). The electromagnetic absorbing sheet (15) corresponds to the size of the shield (6).

5. The vehicle-mounted high-gain GPS antenna assembly according to claim 1, characterized in that: The base (1) is provided with an RF cable sheath (10) fitted on the outside of the RF coaxial cable (2). The sheath is mainly for protecting the bent part of the RF cable to avoid damage to the bent section.

6. The vehicle-mounted high-gain GPS antenna assembly according to claim 1, characterized in that: A product label layer (5) is provided on the outer wall of the radio frequency coaxial cable (2).

7. The vehicle-mounted high-gain GPS antenna assembly according to claim 1, characterized in that: A sealing gasket (11) is provided below the base (1), and a sealing ring (7) is provided between the outer cover (8) and the base (1).

8. The vehicle-mounted high-gain GPS antenna assembly according to claim 1, characterized in that: The base (1) has an extended cylindrical structure at the center of its lower surface. The bottom surface of the structure has a groove for the radio frequency cable sheath (10) to be inserted, and the outer wall of the structure has a thread. The sealing gasket (11) is fixed to the lower surface of the base (1) by the threaded engagement of the nut (13). An anti-loosening plate (12) is provided between the nut (13) and the sealing gasket (11).

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