Small-sized four-star seven-frequency RTK antenna

Abstract

The utility model relates to the technical field of antennas, in particular to a small-sized four-star seven-frequency RTK antenna, which is characterized in that a GNSS antenna module is arranged inside an antenna shell, a protective ring is arranged at the side part of the antenna shell, a radio frequency cable penetrates through the protective ring and then penetrates into the antenna shell to be connected with the GNSS antenna module, the other end of the radio frequency cable is connected with a radio frequency connector, and the other end of the radio frequency cable is connected with a power supply. The inner side of the connector outer shell is provided with a bayonet which is butted, buckled and fixed with the connector inner shell, a wire core at one end of the radio frequency cable is electrically connected with the center pin and is inserted into the connector inner shell, an insulator is arranged in the connector inner shell, and a braid layer of the radio frequency cable is crimped at the tail part of the connector inner shell through a wire pressing copper pipe and is electrically conducted. Compared with the prior art, the small-sized four-star seven-frequency RTK antenna not only reduces the size of the antenna, but also has good performance, has the advantages of high gain, wide frequency, small noise coefficient and the like, is accurate in positioning and high in speed, and greatly improves the practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and particularly relates to a small four-star seven-frequency RTK antenna.

Background Art

[0002] RTK technology is a differential method that processes carrier phase observations of two or more measurement stations in real time through a microwave transmission device. The carrier phase collected by the reference station is sent to the user receiver for differential solution to calculate coordinates. This is a new and commonly used GPS measurement method. In the past, static, fast static, and dynamic measurements all required post-processing to obtain centimeter-level accuracy, while RTK is a measurement method that can obtain centimeter-level positioning accuracy in the field in real time. It uses the carrier phase dynamic real-time differential method, which is a major milestone in GPS applications. Its appearance has brought new dawn to engineering lofting, topographic mapping, and various control measurements, greatly improving the efficiency of field operations.

[0003] The high-precision positioning (RTK) carrier phase differential technology is currently the most effective way to achieve real-time high-precision positioning; and the antenna directly affects the speed and accuracy of high-precision positioning.

[0004] However, the positioning antennas in the prior art are either good in performance but large in antenna volume and inconvenient to install, or small in volume but poor in performance, having deficiencies and requiring improvement.

Content of the Utility Model

[0005] In order to overcome the above problems, the utility model proposes a small four-star seven-frequency RTK antenna that can effectively solve the above problems. It not only reduces the volume of the antenna but also has good performance, with advantages such as high gain, wide frequency band, and small noise coefficient, accurate positioning, fast speed, and greatly improving the practicability.

[0006] A technical solution provided by the utility model to solve the above technical problems is: to provide a small four-star seven-frequency RTK antenna, including an antenna housing, a GNSS antenna module, a guard coil, a radio frequency cable, and a radio frequency connector. The GNSS antenna module is arranged inside the antenna housing, the guard coil is arranged on the side of the antenna housing, the radio frequency cable passes through the guard coil and then penetrates into the antenna housing to be connected with the GNSS antenna module, and the other end of the radio frequency cable is connected with the radio frequency connector; the radio frequency connector includes a connector housing, a center pin, a pressure copper tube, and a connector inner shell. There is a bayonet on the inner side of the connector housing for docking and buckling fixation with the connector inner shell. One end of the wire core of the radio frequency cable is electrically connected to the center pin and inserted into the connector inner shell. An insulator is arranged inside the connector inner shell, and the braided layer of the radio frequency cable is crimped with the pressure copper tube at the tail of the connector inner shell for electrical conduction.

[0007] Preferably, one end of the RF cable is electrically connected to the RF connector, and the other end of the RF cable is inserted into the antenna housing and electrically connected to the GNSS antenna module 5.

[0008] Preferably, the antenna housing includes a circular outer shell and a circular bottom shell. A plurality of matching fixing posts are provided inside both the circular outer shell and the circular bottom shell for screwing to fix the circular outer shell and the circular bottom shell, forming a first inner cavity.

[0009] Preferably, the GNSS antenna module is arranged in the first inner cavity.

[0010] Preferably, the circular bottom shell and the circular outer shell are both provided with corresponding square grooves, and the square grooves form an avoidance hole when the circular bottom shell and the circular outer shell are engaged. The avoidance hole is used for placing a protection coil.

[0011] Preferably, a circular ring rubber gasket is provided at the edge of the circular bottom shell, and the circular ring rubber gasket is clamped at the joint of the circular bottom shell and the circular outer shell.

[0012] Preferably, the GNSS antenna module adopts a debugging method of a dual-feed built-in ceramic antenna.

[0013] Preferably, the GNSS antenna module reserves a π-shaped circuit.

[0014] Compared with the prior art, the small four-star seven-frequency RTK antenna of the present utility model has high gain, wide bandwidth, supports multiple frequency bands, and can be applied to a variety of usage environments; the antenna has a small volume, is not easy to loosen and fall off after installation, has good waterproof and dustproof performance, and can work normally even in harsh environments without affecting the performance; the antenna has high accuracy and low noise coefficient, and can locate faster during operation.

Description of the Drawings

[0015] Figure 1 is the overall view of the small four-star seven-frequency RTK antenna of the present utility model;

[0016] Figure 2 is the exploded view of the small four-star seven-frequency RTK antenna of the present utility model;

[0017] Figure 3 is the exploded view of the RF connector of the small four-star seven-frequency RTK antenna of the present utility model.

Detailed Embodiment

[0018] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and implementation examples. It should be understood that the specific implementation examples described here are only used to explain the present utility model and are not used to limit the present utility model.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are limited to the relative positions on the specified views, rather than absolute positions.

[0020] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] Please refer to Figures 1 to 3 , the small four-star seven-frequency RTK antenna of the present utility model includes an antenna housing 1, a GNSS antenna module 5, a guard coil 2, a radio frequency cable 3, and a radio frequency connector 4. The GNSS antenna module 5 is arranged inside the antenna housing 1, the guard coil 2 is arranged on the side of the antenna housing 1, the radio frequency cable 3 passes through the guard coil 2 and then penetrates into the antenna housing 1 to be connected with the GNSS antenna module 5, and the other end of the radio frequency cable 3 is connected with the radio frequency connector 4.

[0022] One end of the radio frequency cable 3 is electrically connected to the radio frequency connector 4, and the other end of the radio frequency cable 3 is inserted into the antenna housing 1 and electrically connected to the GNSS antenna module 5.

[0023] The radio frequency connector 4 includes a connector housing 41, a center pin 43, a pressure copper tube 42, and a connector inner housing 44; there is a bayonet inside the connector housing 41 that can be docked and snap-fixed with the connector inner housing 44; one end of the wire core of the radio frequency cable 3 is electrically connected to the center pin 43 and inserted into the connector inner housing 44, and an insulator is arranged inside the connector inner housing 44 to fix the center pin 43 and prevent the center pin 43 from being short-circuited with the connector inner housing 44; the braided layer of the radio frequency cable 3 is crimped with the pressure copper tube 42 at the tail of the connector inner housing 44 for electrical conduction to prevent loosening.

[0024] In this embodiment, the small four-star seven-frequency RTK antenna is characterized in that the antenna housing 1 includes a circular outer housing 11 and a circular bottom housing 12, and a plurality of matching fixing posts 13 are arranged inside both the circular outer housing 11 and the circular bottom housing 12 for screwing to fix the circular outer housing 11 and the circular bottom housing 12 to form a first inner cavity, and the GNSS antenna module 5 is arranged in the first cavity.

[0025] In this embodiment, the circular bottom case 12 and the circular outer case 11 are characterized in that they are both provided with corresponding square grooves, and the square grooves form avoidance holes when the circular bottom case 12 and the circular outer case 11 are engaged. The avoidance holes are used to place the protection coil 2, so that the radio frequency cable 3 passing in and out of the protection coil 2 can better protect the radio frequency cable 3, and it will not break even after being bent many times.

[0026] In this embodiment, a circular ring rubber ring is provided at the edge of the circular bottom case 12. The circular ring rubber ring is clamped at the joint of the circular bottom case 12 and the circular outer case 11 for waterproof and dustproof functions to avoid short - circuit damage to the GNSS antenna module 5.

[0027] In this embodiment, the GNSS antenna module 5 adopts the debugging method of a dual - feed built - in ceramic antenna, so that its frequency range can be better extended, with a wide coverage range, so as to achieve four - star and seven - frequency. In the debugging of the circuit, issues such as electromagnetic compatibility and matching are also considered. A π - type circuit is reserved for better matching with the host to exert better performance.

[0028] By reducing the ceramic area of the positioning antenna and compressing and streamlining the circuit to reduce the size of the PCB board, the overall size of the antenna is about 65*65*25mm 3 , thus solving the problems that high - precision antennas are large in volume, inconvenient to use, and limited in usage scenarios, enabling the radio frequency connector to be locked and fixed with external devices, ensuring the stability of the connection, and having a reasonable design, a compact structure, being easy to disassemble, repair, and having strong practicability.

[0029] Compared with the prior art, the small - sized four - star and seven - frequency RTK antenna of the present invention has high gain, wide bandwidth, supports multiple frequency bands, and can be applied to a variety of usage environments; the antenna is small in volume, not easy to loosen and fall off after installation, has good waterproof and dustproof performance, and can work normally even in harsh environments without affecting performance; the antenna has high accuracy and low noise coefficient, and can locate faster during operation.

[0030] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any modifications, equivalent substitutions, and improvements made within the concept of the present invention should be included in the patent protection scope of the present invention.

Claims

1. A small four-star seven-frequency RTK antenna, characterized in that, It includes an antenna housing, a GNSS antenna module, a guard coil, a radio frequency cable, and a radio frequency connector. The GNSS antenna module is arranged inside the antenna housing. The guard coil is arranged on the side of the antenna housing. The radio frequency cable passes through the guard coil and then penetrates into the antenna housing to be connected to the GNSS antenna module. The other end of the radio frequency cable is connected to the radio frequency connector; The radio frequency connector includes a connector housing, a center pin, a wire-pressing copper tube, and a connector inner shell. There is a bayonet on the inner side of the connector housing for docking and snap-fixing with the connector inner shell. One end of the wire core of the radio frequency cable is electrically connected to the center pin and inserted into the connector inner shell. An insulator is arranged inside the connector inner shell. The braided layer of the radio frequency cable is crimped with the wire-pressing copper tube at the tail of the connector inner shell for electrical conduction.

2. The small four-star seven-frequency RTK antenna according to claim 1, wherein One end of the radio frequency cable is electrically connected to the radio frequency connector, and the other end of the radio frequency cable is inserted into the antenna housing and electrically connected to the GNSS antenna module 5.

3. The small four-star seven-frequency RTK antenna according to claim 1, wherein The antenna housing includes a circular outer shell and a circular bottom shell. Multiple matching fixing posts are arranged inside both the circular outer shell and the circular bottom shell for screwing to fix the circular outer shell and the circular bottom shell to form a first inner cavity.

4. The small four-star seven-frequency RTK antenna according to claim 3, characterized in that, The GNSS antenna module is arranged in the first inner cavity.

5. The small four-star seven-frequency RTK antenna according to claim 3, characterized in that Both the circular bottom shell and the circular outer shell are provided with corresponding square grooves. When the circular bottom shell and the circular outer shell are clamped, the square grooves form an avoidance hole for placing the guard coil.

6. The small four-star seven-frequency RTK antenna according to claim 3, wherein A circular rubber ring is arranged on the edge of the circular bottom shell, and the circular rubber ring is clamped at the joint of the circular bottom shell and the circular outer shell.

7. The small four-star seven-frequency RTK antenna according to claim 1, characterized in that The GNSS antenna module adopts the debugging method of a dual-feed built-in ceramic antenna.

8. The small four-star seven-frequency RTK antenna according to claim 1, wherein The GNSS antenna module reserves a π-shaped circuit.

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