Vehicle-mounted antenna

Abstract

The invention provides a vehicle-mounted antenna, and relates to the technical field of antennas, the vehicle-mounted antenna comprises a shell, a circuit board is arranged in the shell, an antenna assembly is arranged on one side of the circuit board, the antenna assembly comprises a satellite communication antenna, a satellite internet antenna and a satellite navigation antenna, and the satellite communication antenna and the satellite internet antenna are stacked; the circuit structure is arranged on the circuit board and connected with the antenna assembly, the circuit structure comprises a power supply circuit, a filter, a low noise amplifier and a power amplifier, and the low noise amplifier is connected with the receiving end of the satellite communication antenna and the receiving end of the satellite internet antenna. The power amplifier is connected with the transmitting end of the satellite communication antenna and the transmitting end of the satellite internet antenna; the problems that in the prior art, a vehicle-mounted antenna is single in function, poor in integration level and high in vehicle-mounted arrangement difficulty, and the signal quality of an antenna of a passive structure is limited are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of antennas, and more particularly, relates to a vehicle-mounted antenna. Background Art

[0002] Currently, traditional positioning antennas have a low level of integration, typically consisting of a single GNSS antenna box, a single Tiantong satellite antenna box, or a single StarNet antenna box. Furthermore, the power supply and active amplifier control for on-board antennas are complex, and their size is difficult to manage. Most Tiantong and StarNet antennas utilize a passive structure within the on-board antenna box. With the increasing integration and functionality required for on-board positioning antennas, and the requirement for open sky above, the complexity of deploying these multiple antennas increases. Summary of the Invention

[0003] The purpose of the present invention is to provide a vehicle-mounted antenna to address the deficiencies in the prior art, thereby solving the problems of single function, poor integration, high difficulty in vehicle-mounted arrangement, and limited signal quality of the passive antenna in the prior art.

[0004] In order to achieve the above object, the present invention provides a vehicle-mounted antenna, comprising:

[0005] a housing, wherein a circuit board is disposed within the housing, an antenna assembly is disposed on one side of the circuit board, the antenna assembly comprising a satellite communication antenna, a satellite internet antenna, and a satellite navigation antenna, the satellite communication antenna and the satellite internet antenna being stacked;

[0006] A circuit structure is provided on the circuit board and connected to the antenna assembly. The circuit structure includes a power supply circuit, a filter, a low-noise amplifier and a power amplifier. The low-noise amplifier is connected to the receiving end of the satellite communication antenna and the receiving end of the satellite Internet antenna. The power amplifier is connected to the transmitting end of the satellite communication antenna and the transmitting end of the satellite Internet antenna.

[0007] Optionally, the satellite communication antenna includes a Tiantong receiving antenna and a Tiantong transmitting antenna, the satellite Internet antenna includes a Xingwang receiving antenna and a Xingwang transmitting antenna, and the satellite navigation antenna is a GNSS antenna.

[0008] Optionally, the Tiantong receiving antenna, the Tiantong transmitting antenna, the Starnet receiving antenna and the Starnet transmitting antenna are all ceramic antennas, and form a four-layer stacked arrangement.

[0009] Optionally, the star network receiving antenna, the Tiantong receiving antenna, the Tiantong transmitting antenna and the star network transmitting antenna are arranged in sequence from bottom to top, and the GNSS antenna and the star network receiving antenna are arranged on the same layer.

[0010] Optionally, the polarization directions of the star network receiving antenna, the GNSS antenna, the Tiantong receiving antenna, the Tiantong transmitting antenna and the star network transmitting antenna are left-handed, right-handed, left-handed, left-handed and left-handed respectively.

[0011] Optionally, the star network receiving antenna and the GNSS antenna are connected to the two input ends of the first phase synthesizer through two conductive needles, and the Tiantong receiving antenna, the Tiantong transmitting antenna and the star network transmitting antenna are respectively connected to the second phase synthesizer, the third phase synthesizer and the fourth phase synthesizer through two conductive needles.

[0012] Optionally, the star network receiving antenna is connected to the filter and the low noise amplifier through the first phase synthesizer, the star network transmitting antenna is connected to the power amplifier through the fourth phase synthesizer, and the low noise amplifier and the power amplifier are connected to the duplexer.

[0013] Optionally, the Tiantong receiving antenna is connected to the filter and the low noise amplifier through the third phase synthesizer, the Tiantong transmitting antenna is connected to the power amplifier through the second phase synthesizer, and the low noise amplifier and the power amplifier are connected to the duplexer.

[0014] Optionally, the GNSS antenna is connected to a filter and a low noise amplifier through the first phase synthesizer.

[0015] The present invention provides a vehicle-mounted antenna, which has the following beneficial effects: the vehicle-mounted antenna has an integrated circuit board and an antenna assembly with a satellite communication antenna, a satellite Internet antenna, and a satellite navigation antenna in a shell, is rich in functions, and its stacked arrangement makes it highly integrated, greatly reducing the shell size and the difficulty of vehicle-mounted arrangement; at the same time, the circuit structure has a power supply circuit, a filter, a low-noise amplifier, and a power amplifier; the receiving end of the satellite communication antenna, the receiving end of the satellite Internet antenna, and the satellite navigation antenna are all connected to the low-noise amplifier, and the transmitting end of the satellite communication antenna and the transmitting end of the satellite Internet antenna are all connected to the power amplifier, forming an active structure, truly realizing a highly integrated bidirectional active amplifier design, which can effectively compensate for the signal insertion loss caused by the excessively long wiring harness when the vehicle-mounted antenna is arranged in the vehicle, thereby improving the signal quality.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0018] Figure 1 and Figure 2 A schematic diagram of the appearance and structure of a vehicle-mounted antenna according to an embodiment of the present invention is shown.

[0019] Figure 3 A schematic diagram of the exploded structure of a vehicle-mounted antenna according to an embodiment of the present invention is shown.

[0020] Figure 4 A schematic structural diagram of an antenna assembly of a vehicle-mounted antenna according to an embodiment of the present invention is shown.

[0021] Figure 5 A schematic diagram of pin connections of a vehicle-mounted antenna according to an embodiment of the present invention is shown.

[0022] Figure 6 A circuit diagram of a star network receiving antenna and a star network transmitting antenna of a vehicle-mounted antenna according to an embodiment of the present invention is shown.

[0023] Figure 7 A circuit diagram of a GNSS antenna of a vehicle-mounted antenna according to an embodiment of the present invention is shown.

[0024] Description of reference numerals:

[0025] 1. Circuit board; 2. Antenna assembly; 3. Power supply circuit; 4. Filter; 5. Low noise amplifier; 6. Power amplifier; 7. Tiantong receiving antenna; 8. Tiantong transmitting antenna; 9. Starnet receiving antenna; 10. Starnet transmitting antenna; 11. Wiring harness connector assembly; 12. Waterproof rubber ring; 13. Upper shell; 14. Lower shell; 15. Screw; 16. Conductive pin; 17. GNSS antenna; 18. First phase synthesizer; 19. Second phase synthesizer; 20. Third phase synthesizer; 21. Fourth phase synthesizer; 22. Load; 23. Duplexer; 24. Ceramic dielectric filter; 25. Fixed attenuator; 26. Voltage regulator; 27. Power amplifier shielding cover; 28. Active circuit shielding cover; 29. Coaxial cable. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Instead, these embodiments are provided to make the present invention more thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0027] like Figures 1 to 3 As shown, the present invention provides a vehicle-mounted antenna, comprising:

[0028] A housing is provided with a circuit board 1, an antenna assembly 2 is provided on one side of the circuit board 1, the antenna assembly 2 includes a satellite communication antenna, a satellite internet antenna and a satellite navigation antenna, and the satellite communication antenna and the satellite internet antenna are stacked;

[0029] Circuit structure, the circuit structure is arranged on the circuit board 1 and connected to the antenna assembly 2. The circuit structure includes a power supply circuit 3, a filter 4, a low-noise amplifier 5 and a power amplifier 6. The low-noise amplifier 5 is connected to the receiving end of the satellite communication antenna and the receiving end of the satellite Internet antenna. The power amplifier 6 is connected to the transmitting end of the satellite communication antenna and the transmitting end of the satellite Internet antenna.

[0030] Specifically, in order to solve the problems in the prior art that the vehicle-mounted antenna has a single function, poor integration, high difficulty in vehicle-mounted arrangement, and limited antenna signal quality of the passive structure; the vehicle-mounted antenna provided by the present invention has an integrated circuit board 1 in the shell and an antenna assembly 2 with a satellite communication antenna, a satellite Internet antenna, and a satellite navigation antenna. It is rich in functions, and the stacked arrangement makes it highly integrated, greatly reducing the shell size and the difficulty of vehicle-mounted arrangement. At the same time, the circuit structure has a power supply circuit 3, a filter 4, a low-noise amplifier 5 and a power amplifier 6. The receiving end of the satellite communication antenna, the receiving end of the satellite Internet antenna and the satellite navigation antenna are all connected to the low-noise amplifier 5, and the transmitting end of the satellite communication antenna and the transmitting end of the satellite Internet antenna are all connected to the power amplifier 6, forming an active structure, truly realizing a highly integrated bidirectional active amplifier design, which can effectively compensate for the signal insertion loss caused by the excessively long wiring harness when the vehicle-mounted antenna is arranged in the car, thereby improving the signal quality.

[0031] Optionally, the satellite communication antenna includes a Tiantong receiving antenna 7 and a Tiantong transmitting antenna 8, the satellite Internet antenna includes a star network receiving antenna 9 and a star network transmitting antenna 10, and the satellite navigation antenna is a GNSS antenna.

[0032] Specifically, the Tiantong antenna is an antenna used for satellite communications, especially for the Tiantong satellite system. The Tiantong satellite system is a mobile communication satellite system independently developed by China, mainly used to provide satellite telephone, data transmission and other services; the Starnet antenna is an antenna used for satellite Internet, especially for low Earth orbit (LEO) satellite Internet systems such as Starlink; the Tiantong satellite system is a high-orbit satellite system, and the Starnet satellite system is a low-orbit satellite system; the vehicle-mounted antenna integrates the Tiantong antenna, Starnet antenna and GNSS navigation antenna in the shell, which expands the function of the vehicle-mounted antenna and improves the integration.

[0033] In this embodiment, mounting ears are provided on both sides of the housing, and mounting holes are provided on the mounting ears to facilitate installation in the spoiler of the car; Figure 3As shown, the circuit board 1 is connected to the wiring harness connector assembly 11, and a waterproof rubber ring 1712 is provided between the wiring harness of the coaxial cable 29 and the through hole on the shell. The shell includes an upper shell 13 and a lower shell 14 that are sealed and connected. The circuit board 1 is fixed in the shell by screws 15.

[0034] Optionally, the Tiantong receiving antenna 7, the Tiantong transmitting antenna 8, the Starnet receiving antenna 9 and the Starnet transmitting antenna 10 are all ceramic antennas, and form a four-layer stacked arrangement.

[0035] Specifically, the antenna assembly 2 is a ceramic antenna with four layers stacked together, and the four ceramic antennas form a pyramid-shaped structure from bottom to top.

[0036] In this embodiment, the Tiantong receiving antenna 7, the Tiantong transmitting antenna 8, the Starnet receiving antenna 9 and the Starnet transmitting antenna 10 respectively include a substrate and a silver layer antenna arranged on the upper side of the substrate. Each silver layer antenna is connected to two conductive needles 16, and the conductive needles 16 pass through the base layer from top to bottom and are connected to the circuit structure on the circuit board 1.

[0037] Optionally, the star network receiving antenna 9, the Tiantong receiving antenna 7, the Tiantong transmitting antenna 8 and the star network transmitting antenna 10 are arranged in sequence from bottom to top, and the GNSS antenna and the star network receiving antenna 9 are arranged on the same layer.

[0038] Specifically, such as Figure 4 As shown, a silver layer antenna of a GNSS antenna is also provided on the upper side of the bottommost substrate. The silver layer antenna of the GNSS antenna and the silver layer antenna of the star network receiving antenna 9 share two conductive needles 16.

[0039] Furthermore, in order to stack the Tiantong receiving antenna 7, Tiantong transmitting antenna 8, Starnet receiving antenna 9 and Starnet transmitting antenna 10 to save space and ensure effective isolation and decoupling between the layers, the Starnet receiving antenna 9 and Starnet transmitting antenna 10 with closer frequencies are respectively arranged at the bottom and top layers, and the Tiantong receiving antenna 7 and Tiantong transmitting antenna 8 with larger frequency difference are arranged between the two, which has a great effect on improving the transmission and reception and improving the reception signal-to-noise ratio.

[0040] Optionally, the polarization directions of the star network receiving antenna 9, the GNSS antenna, the Tiantong receiving antenna 7, the Tiantong transmitting antenna 8 and the star network transmitting antenna 10 are left-handed, right-handed, left-handed, left-handed and left-handed respectively.

[0041] Specifically, the star network receiving antenna 9 and the GNSS antenna on the same substrate adopt different polarization directions to ensure signal quality.

[0042] Optionally, the star network receiving antenna 9 and the GNSS antenna are connected to the two input ends of the first phase synthesizer 18 through two conductive needles 16, and the Tiantong receiving antenna 7, the Tiantong transmitting antenna 8 and the star network transmitting antenna 10 are respectively connected to the second phase synthesizer 19, the third phase synthesizer 20 and the fourth phase synthesizer 21 through two conductive needles 16.

[0043] Specifically, such as Figure 5 As shown, each phase synthesizer includes four pins, of which the first pin and the second pin are input pins, and the third pin and the fourth pin are output pins; the two conductive pins 16 connected to the star network receiving antenna 9 and the GNSS antenna are connected to the first pin and the second pin of the first phase synthesizer 18, and the third pin and the fourth pin of the first phase synthesizer 18 respectively output the left-handed star network receiving antenna 9 signal and the right-handed GNSS antenna signal; the two conductive pins 16 of the Tiantong receiving antenna 7, the Tiantong transmitting antenna 8 and the star network transmitting antenna 10 are respectively connected to the first pin and the second pin of the second phase synthesizer 19, the third phase synthesizer 20 and the fourth phase synthesizer 21, and the third pins of the second phase synthesizer 19, the third phase synthesizer 20 and the fourth phase synthesizer 21 respectively output the left-handed Tiantong receiving antenna 7 signal, the Tiantong transmitting antenna 8 signal and the star network transmitting antenna 10 signal, and the fourth pins of the Tiantong receiving antenna 7, the Tiantong transmitting antenna 8 and the star network transmitting antenna 10 are connected to the load 22.

[0044] In this embodiment, the load 22 is a 50 ohm resistor.

[0045] In this embodiment, the phase synthesizer is a hybrid phase synthesizer based on a 3dB bridge.

[0046] Optionally, the star network receiving antenna 9 is connected to the filter 4 and the low noise amplifier 5 through the first phase synthesizer 18, the star network transmitting antenna 10 is connected to the power amplifier 6 through the fourth phase synthesizer 21, and the low noise amplifier 5 and the power amplifier 6 are connected to the duplexer 23.

[0047] Specifically, such as Figure 6 As shown, the fourth pin of the first phase synthesizer 18 is connected to a SAW filter 4, a low noise amplifier 5 (LNA) and a duplexer 23 in sequence through the wiring on the circuit board 1. The duplexer 23 is also connected to a power amplifier 6 (PA) and the fourth pin of the fourth phase synthesizer 21 in sequence through the wiring. The output end of the duplexer 23 is connected to the coaxial cable 29. The power supply circuit 3 is connected to active components such as the low noise amplifier 5 and the power amplifier 6 through the wiring to power them.

[0048] In this embodiment, a subsequent SAW filter 4 is connected between the low noise amplifier 5 and the duplexer 23 .

[0049] In this embodiment, a post-stage SAW filter 4 and a fixed attenuator 25 are connected between the power amplifier 6 and the duplexer 23 , and a ceramic dielectric filter 24 is provided between the power amplifier 6 and the first phase synthesizer 18 .

[0050] In this embodiment, a resistor and a voltage regulator 26 are further connected to the power supply line.

[0051] Optionally, the Tiantong receiving antenna 7 is connected to the filter 4 and the low noise amplifier 5 through the third phase synthesizer 20, the Tiantong transmitting antenna 8 is connected to the power amplifier 6 through the second phase synthesizer 19, and the low noise amplifier 5 and the power amplifier 6 are connected to the duplexer 23.

[0052] Specifically, the circuit connection structure of the Tiantong receiving antenna 7 and the Tiantong transmitting antenna 8 is similar to the circuit connection structure of the Xingwang receiving antenna 9 and the Xingwang transmitting antenna 10.

[0053] Optionally, the GNSS antenna is connected to the filter 4 and the low noise amplifier 5 via a first phase synthesizer 18 .

[0054] Specifically, such as Figure 7 As shown, the third pin of the first phase synthesizer 18 is connected to the SAW filter 4 and the low-noise amplifier 5 in sequence through the wiring on the circuit board 1, the output end of the low-noise amplifier 5 is connected to the coaxial cable 29, and the power supply circuit 3 is connected to the low-noise amplifier 5 and other active components through the wiring to power them.

[0055] In this embodiment, two SAW filters 4 and two low-noise amplifiers 5 are provided. One SAW filter 4 is provided between the upstream low-noise amplifier 5 and the first phase synthesizer 18, and the other SAW filter 4 is connected between the two low-noise amplifiers 5, forming a design of dual low-noise amplifiers 5 and dual filters 4, reducing out-of-band interference and increasing the gain multiple to compensate for line loss.

[0056] In this embodiment, a resistor and a voltage regulator 26 are further connected to the power supply line.

[0057] In this embodiment, a power amplifier shielding cover 27 and an active circuit shielding cover 28 connected to the circuit board 1 are provided in the housing. The power amplifier shielding cover 27 is provided on the outside of each power amplifier 6, and the active circuit shielding cover 28 is provided on the outside of the circuit structure.

[0058] Specifically, each power amplifier shielding cover 27 is provided on the outside of a power amplifier 6, and the active circuit shielding cover 28 is provided on the outside of the entire circuit structure on the circuit board 1, thereby ensuring the shielding effect and improving the anti-interference capability.

[0059] In summary, the vehicle-mounted antenna provided by the present invention adopts a multi-layer ceramic antenna design architecture, integrating Tiantong transmitting antenna, Tiantong receiving antenna, Starnet transmitting antenna, Starnet receiving antenna and GNSS antenna, and the transmitting antennas are connected to a power amplifier, and the receiving antennas are connected to a low-noise amplifier, and bidirectional active amplification can effectively compensate for the signal insertion loss problem caused by the excessive length of the wiring harness; and multiple antennas are highly integrated in design, the size of the ceramic antenna of the bottom layer can be 60*60*6mm, and the size of each layer decreases successively. The total thickness of the ceramic antenna is 22.5mm, which has a very positive effect on the application and layout of the vehicle, so that the shell size can be 75*75*45mm, which can be conveniently installed in the vehicle-mounted spoiler.

[0060] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A vehicle-mounted antenna, characterized in that: include: a housing, wherein a circuit board is disposed within the housing, an antenna assembly is disposed on one side of the circuit board, the antenna assembly comprising a satellite communication antenna, a satellite internet antenna, and a satellite navigation antenna, the satellite communication antenna and the satellite internet antenna being stacked; A circuit structure is provided on the circuit board and connected to the antenna assembly. The circuit structure includes a power supply circuit, a filter, a low-noise amplifier and a power amplifier. The low-noise amplifier is connected to the receiving end of the satellite communication antenna, the receiving end of the satellite Internet antenna and the satellite navigation antenna. The power amplifier is connected to the transmitting end of the satellite communication antenna and the transmitting end of the satellite Internet antenna.

2. The vehicle-mounted antenna according to claim 1, characterized in that: The satellite communication antenna includes a Tiantong receiving antenna and a Tiantong transmitting antenna, the satellite Internet antenna includes a Xingwang receiving antenna and a Xingwang transmitting antenna, and the satellite navigation antenna is a GNSS antenna.

3. The vehicle-mounted antenna according to claim 2, characterized in that: The Tiantong receiving antenna, the Tiantong transmitting antenna, the Starnet receiving antenna and the Starnet transmitting antenna are all ceramic antennas, and form a four-layer stacked arrangement.

4. The vehicle-mounted antenna according to claim 3, characterized in that: The star network receiving antenna, the Tiantong receiving antenna, the Tiantong transmitting antenna and the star network transmitting antenna are arranged in sequence from bottom to top, and the GNSS antenna and the star network receiving antenna are arranged on the same layer.

5. The vehicle-mounted antenna according to claim 4, characterized in that: The polarization directions of the star network receiving antenna, the GNSS antenna, the Tiantong receiving antenna, the Tiantong transmitting antenna and the star network transmitting antenna are respectively left-handed, right-handed, left-handed, left-handed and left-handed.

6. The vehicle-mounted antenna according to claim 5, characterized in that: The star network receiving antenna and the GNSS antenna are connected to the two input ends of the first phase synthesizer through two conductive needles, and the Tiantong receiving antenna, the Tiantong transmitting antenna and the star network transmitting antenna are respectively connected to the second phase synthesizer, the third phase synthesizer and the fourth phase synthesizer through two conductive needles.

7. The vehicle-mounted antenna according to claim 6, characterized in that: The star network receiving antenna is connected to the filter and the low noise amplifier through the first phase synthesizer, the star network transmitting antenna is connected to the power amplifier through the fourth phase synthesizer, and the low noise amplifier and the power amplifier are connected to the duplexer.

8. The vehicle-mounted antenna according to claim 6, characterized in that: The Tiantong receiving antenna is connected to the filter and the low noise amplifier through the third phase synthesizer, the Tiantong transmitting antenna is connected to the power amplifier through the second phase synthesizer, and the low noise amplifier and the power amplifier are connected to the duplexer.

9. The vehicle-mounted antenna according to claim 6, characterized in that: The GNSS antenna is connected to a filter and a low noise amplifier through the first phase synthesizer.

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