GNSS signal forwarding system
By designing a GNSS signal relay system and employing components such as high isolation amplifiers and adjustable attenuators, the positioning accuracy and reliability issues of GNSS signals in weak signal environments were solved, achieving high-precision and high-reliability signal transmission and reducing costs.
Patent Information
- Application Number
- CN202423074604.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Traditional GNSS technology has poor positioning accuracy and reliability in environments with weak GNSS signals, such as indoors or urban canyons, and is easily affected by insufficient signal coverage, attenuation, and interference.
Design a GNSS signal relay system, including a first antenna, a second antenna, an input switching switch, a gain adjustment module, a control module, a power divider, an output switching switch, a multi-output module, and a bias module. Employ high-isolation input switching switches, amplifiers, adjustable attenuators, and output switching switches to improve signal transmission isolation and strength, and to match the signal requirements of different environments.
It improves the positioning accuracy and reliability of GNSS signals, reduces the risk of signal leakage, lowers manufacturing costs, and enhances market competitiveness.
Smart Images
Figure CN223666351U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to satellite signal control technical field, especially a GNSS signal repeater system. BACKGROUND
[0002] With the rapid development of communication industry, signal repeater system has been more widely applied in the high-precision and sophisticated technology application fields such as communication, deep space exploration, national defense, etc. In life, the availability of GNSS signals also needs to be guaranteed to ensure the normal operation of application fields such as intelligent transportation and smart city. At present, the traditional GNSS technology has some defects, for example: in the environment where GNSS signals are weak such as indoors or urban canyons, the positioning accuracy and reliability of the traditional GNSS technology are weak, which can easily lead to insufficient signal coverage, and buildings, trees, weather conditions, etc. can also cause signal attenuation and interference, affecting the positioning accuracy.
[0003] Therefore, it is crucial for those skilled in the art to design a GNSS signal repeater system with high positioning accuracy and high reliability. UTILITY MODEL CONTENT
[0004] The technical problem to be solved by the embodiments of the utility model lies in providing a GNSS signal repeater system with high positioning accuracy and high reliability to solve the problem of weak positioning accuracy and reliability in the prior art.
[0005] The utility model discloses a GNSS signal repeater system, and the scheme lies in, include: first antenna, second antenna, input switch, gain adjustment module, control module, power divider, output switch, multichannel output module and bias module, first antenna with second antenna all are connected with the input end of input switch, the output of input switch is connected with the input of gain adjustment module, the output of gain adjustment module is connected with the input of power divider, the output of power divider is connected with multichannel output module respectively, input switch, gain adjustment module and output switch all are connected with the control end of control module, bias module is connected with input switch, output switch and control module.
[0006] Optionally, the first antenna is a GNSS antenna, and the second antenna is an anti-interference antenna.
[0007] Optionally, the gain adjustment module comprises an amplifier and an attenuator, the input end of the amplifier is connected with the output end of the input switch, the output end of the amplifier is connected with the input end of the attenuator, and the output end of the attenuator is connected with the input end of the power divider.
[0008] Optionally, the amplifier is an LNA amplifier.
[0009] Optionally, the attenuator is an adjustable attenuator, and its adjustable range is 0-60dB.
[0010] The power divider comprises a first power dividing circuit, a second power dividing circuit and a third power dividing circuit, the input end of the first power dividing circuit is connected with the output end of the gain adjusting module, the first output end of the first power dividing circuit is connected with the input end of the second power dividing circuit, the second output end of the first power dividing circuit is connected with the input end of the third power dividing circuit, and the output ends of the second power dividing circuit and the third power dividing circuit are respectively connected with multiple output modules.
[0011] Optionally, the biasing module comprises a first biasing device, a second biasing device and a third biasing device, the output end of the first biasing device is connected with the first antenna, the output end of the second biasing device is connected with the second antenna, and the output end of the third biasing device is connected with the output switching switch.
[0012] Optionally, a display is further included, and the display is connected with the control module.
[0013] Optionally, a key and a serial port are further included, and the key and the serial port are both connected with the control module.
[0014] Optionally, four output modules are included, and the power divider comprises four outputs, which are respectively connected with the four output modules through the output switching switch.
[0015] Compared with the prior art, the GNSS signal forwarding system has the following beneficial effects: by designing a GNSS signal forwarding system, the system comprises a first antenna, a second antenna, an input switching switch, a gain adjusting module, a control module, a power divider, an output switching switch, multiple output modules and a biasing module; by adopting the input switching switch with high isolation, the isolation between different antenna signal transmissions is effectively improved, and the signals are not interfered with each other; the amplifier is used to amplify the signals, so that the signal of the four outputs can reach 60dB at the maximum, and the signal strength of the signal output is ensured; the adjustable attenuator is used to attenuate the signals, so as to match the required signal strength in different environments, and the positioning speed is effectively improved; the output switching switch is used to shut off the multiple output signals, and the shut-off isolation can be greater than 40dB, so that the signal leakage can be effectively avoided; and the circuit of the GNSS signal forwarding system is simple, the component cost is low, the manufacturing cost is low, and the market competitiveness is effectively improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] The technical scheme of the utility model will be further explained in detail below with reference to the drawings and embodiments, and the drawings show that:
[0017] Figure 1 is a system block diagram of the GNSS signal forwarding system provided by the embodiment of the present application;
[0018] Figure 2 is a circuit diagram of the power divider provided by the embodiment of the present application.
[0019] The reference signs in the drawings are as follows:
[0020] 100, first antenna; 200, second antenna; 300, input switching switch; 400, gain adjustment module; 500, control module; 600, power divider; 700, output switching switch; 800, multi-output module; 410, amplifier; 420, attenuator; 910, first biasing device; 920, second biasing device; 930, third biasing device; 10, display; 20, key; 30, serial port. DETAILED DESCRIPTION
[0021] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Now, the preferred embodiments of the present application will be described in detail with reference to the drawings.
[0022] As shown in Figure 1 and Figure 2 , the present application provides a specific embodiment of the GNSS signal forwarding system.
[0023] A GNSS signal forwarding system, referring to Figure 1 , the GNSS signal forwarding system comprises a first antenna 100, a second antenna 200, an input switching switch 300, a gain adjustment module 400, a control module 500, a power divider 600, an output switching switch 700, a multi-output module 800 and a biasing module, the first antenna 100 and the second antenna 200 are both used for receiving satellite signals, the input switching switch 300 is used for selecting the signal of the first antenna 100 or the second antenna 200 for output, the gain adjustment module 400 is used for adjusting the gain of the input signal to meet the required signal strength in different environments, the power divider 600 is used for dividing the signal into multiple paths to select the corresponding output module 800 for output through the output switching switch 700.
[0024] Among them, referring to Figure 1The first antenna 100 and the second antenna 200 are connected with input ends of the input switch 300, an output end of the input switch 300 is connected with an input end of the gain adjustment module 400, an output end of the gain adjustment module 400 is connected with an input end of the power divider 600, and output ends of the power divider 600 are connected with the multi-output module 800 respectively; the input switch 300, the gain adjustment module 400 and the output switch 700 are connected with a control end of the control module 500; and the bias module is connected with the input switch 300, the output switch 700 and the control module 500.
[0025] In one of the embodiments, referring to Figure 1 The first antenna 100 can be a GNSS antenna, which is an antenna for receiving signals of a global satellite navigation system, including a global positioning system (GPS), a GLONASS system, a Galileo system and a Beidou navigation system.
[0026] The second antenna 200 can be an anti-interference antenna, which is an antenna for reducing or resisting external interference, covering multiple frequency bands to adapt to interference at different frequencies, and reducing the influence of external electromagnetic interference on signal reception through shielding or filtering technology. It has a certain directivity, can reduce interference signals from non-target directions, and has a low noise coefficient.
[0027] Further, referring to Figure 1 The input ends of the input switch 300 are connected with the output ends of the first antenna 100 and the second antenna 200 respectively, the control end of the input switch 300 is connected with the control module 500, and the output end of the input switch 300 is connected with the gain adjustment module 400. The control module 500 can output a corresponding level signal to the input switch 300, the input switch 300 can select the signal input of the first antenna 100 or the second antenna 200 according to the level signal and output to the gain adjustment module 400, wherein the input switch 300 is a mechanical switch.
[0028] In one of the embodiments, referring to Figure 1 The gain adjustment module 400 includes an amplifier 410 and an attenuator 420, the input end of the amplifier 410 is connected with the output end of the input switch 300, the output end of the amplifier 410 is connected with the input end of the attenuator 420, and the output end of the attenuator 420 is connected with the input end of the power divider 600.
[0029] Specifically, referring to Figure 1The amplifier 410 is used for amplifying the input signal and outputting, and the gain can reach 60dB. The amplifier 410 can be an LNA amplifier 410, which is a low noise amplifier 410 used for amplifying the signal and reducing the noise introduced in the amplification process. For weak signal input, the signal itself can be close to the noise level, and the low noise amplifier 410 can reduce the introduction of additional noise as much as possible to ensure the quality of the signal.
[0030] In one embodiment, the attenuator 420 is an adjustable attenuator 420 used for controlling the signal strength, which allows the user to adjust the strength of the input signal to meet the system requirements or adjust the transmission of the signal in the circuit. It can reduce the power level of the input signal to the required level. In this embodiment, the adjustable range of the adjustable attenuator 420 is 0-60dB. The adjustable attenuator 420 can be controlled and adjusted by the control module 500.
[0031] In one embodiment, the reference Figure 1 The power divider 600 specifically adopts an LC power divider 600 used for dividing the input signal into two or more equal or different power outputs, which is based on the characteristics of inductance and capacitance to cooperate to achieve the power distribution of the input signal.
[0032] In one embodiment, the reference Figure 1 and Figure 2 The LC power divider 600 includes a first power dividing circuit 610, a second power dividing circuit 620 and a third power dividing circuit 630. The input end of the first power dividing circuit 610 is connected with the output end of the gain adjusting module 400. The first output end of the first power dividing circuit 610 is connected with the input end of the second power dividing circuit 620. The second output end of the first power dividing circuit 610 is connected with the input end of the third power dividing circuit 630. The output ends of the second power dividing circuit 620 and the third power dividing circuit 630 are respectively connected with the multi-output module 800.
[0033] Specifically, the reference Figure 1 and Figure 2The specific circuits of the first power dividing circuit 610, the second power dividing circuit 620 and the third power dividing circuit 630 are the same, the first power dividing circuit 610 includes a first capacitor C1, a second capacitor C2, a third capacitor C3 and a first resistor R1, the second power dividing circuit 620 includes a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6 and a second resistor R2, and the third power dividing circuit 630 includes a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9 and a third resistor R3, one end of the first capacitor C1 is connected with the output end of the gain adjusting module 400, the other end of the first capacitor C1 is connected with one end of the second capacitor C2 and one end of the third capacitor C3 respectively, and the two ends of the first resistor R1 are connected with the other end of the second capacitor C2 and the other end of the third capacitor C3 respectively; the other end of the second capacitor C2 is connected with one end of the fourth capacitor C4, the other end of the fourth capacitor C4 is connected with one end of the fifth capacitor C5 and one end of the sixth capacitor C6 respectively, the two ends of the second resistor R2 are connected with the other end of the fifth capacitor C5 and the other end of the sixth capacitor C6 respectively, the other end of the fifth capacitor C5 is connected with one of the output modules 800, and the other end of the sixth capacitor C6 is connected with the other output module 800; the other end of the third capacitor C3 is connected with one end of the seventh capacitor C7, the other end of the seventh capacitor C7 is connected with the other end of the eighth capacitor C8 and the other end of the ninth capacitor C9 respectively, the two ends of the third resistor R3 are connected with the other end of the eighth capacitor C8 and the other end of the ninth capacitor C9 respectively, the other end of the eighth capacitor C8 is connected with the other output module 800, and the other end of the ninth capacitor C9 is connected with the other output module 800, and the first inductor L1 and the second inductor L2 are connected on the second capacitor C2 and the third capacitor C3 respectively, the third inductor L3 and the fourth inductor L4 are connected on the fifth capacitor C5 and the sixth capacitor C6 respectively, and the fifth inductor L5 and the sixth inductor L6 are arranged on the eighth capacitor C8 and the ninth capacitor C9 respectively, so as to realize 4-way signal output.
[0034] In one of the embodiments, referring to Figure 1 The biasing module includes a first biasing device 910, a second biasing device 920 and a third biasing device 930, the output end of the first biasing device 910 is connected with the first antenna 100, the output end of the second biasing device 920 is connected with the second antenna 200, and the output end of the third biasing device 930 is connected with the output switching switch 700.
[0035] Specifically, the first biasing device 910, the second biasing device 920 and the third biasing device 930 have the same function, the input terminals of the first biasing device 910, the second biasing device 920 and the third biasing device 930 are connected to the 5V voltage, the first biasing device 910, the second biasing device 920 and the third biasing device 930 are used to separate or combine the direct current biasing signal and the radio frequency signal to provide the direct current voltage or the biasing voltage to the device requiring the direct current power supply, the output terminal of the first biasing device 910 is connected to the first antenna 100 to supply power to the first antenna 100, the output terminal of the second biasing device 920 is connected to the second antenna 200 to supply power to the second antenna 200, and the output terminal of the third biasing device 930 is connected to the output switching switch 700 to supply power to the output switching switch 700.
[0036] In one embodiment, referring to Figure 1 , the GNSS signal forwarding system comprises the four-way output module 800, the output switching switch 700 comprises four-way input and four-way output, the four-way output of the output switching switch 700 is connected to the four-way output module 800 respectively, and the four-way input of the output switching switch 700 is connected to the fifth capacitor C5, the sixth capacitor C6, the eighth capacitor C8 and the ninth capacitor C9 respectively.
[0037] In one embodiment, referring to Figure 1 , the GNSS signal forwarding system further comprises the display 10, the display 10 is connected to the control module 500, and the display 10 is used for information display and human-computer interaction to facilitate the user to input the control instruction to the system.
[0038] In one embodiment, referring to Figure 1 , the GNSS signal forwarding system further comprises the key 20 and the serial port 30, the key 20 and the serial port 30 are connected to the control module 500, the user can further input the corresponding key 20 control instruction through the key 20 to start or stop the system, or start or stop the input switching switch 300 and the output switching switch 700, further, the GNSS signal forwarding system can be connected to the external electronic device through the serial port 30 to facilitate the input of the control instruction through the external electronic device.
[0039] With the rapid development of the communication industry, the signal forwarding system is more widely used in the application fields of high-precision technology such as communication, deep space exploration and national defense; in life, the availability of GNSS signals also needs to be guaranteed to ensure the normal operation of application fields such as intelligent transportation and smart city; at present, the traditional GNSS technology has some defects, for example: in the environment where the GNSS signal is weak such as indoor or urban canyon, the positioning accuracy and reliability of the traditional GNSS technology are weak, which is easy to cause insufficient signal coverage, and buildings, trees, weather conditions and other factors will also cause signal attenuation and interference, which affects the positioning accuracy, so it is particularly important to design a GNSS signal forwarding system with high positioning accuracy and high reliability.
[0040] In the embodiment, by designing a GNSS signal forwarding system, an input switching switch with high isolation is adopted, which effectively improves the isolation degree between different antenna signal transmissions and ensures that the signals are not disturbed; an amplifier is used to amplify the signals, so that the maximum signal of four-way output can reach 60dB, ensuring the signal strength of signal output; an adjustable attenuator is used to attenuate the signals to match the required signal strength in different environments, effectively improving the positioning speed; an output switching switch is used to shut off the multiple output signals, and the shut-off isolation degree can be greater than 40dB, which can effectively avoid signal leakage; and the circuit of the GNSS signal forwarding system is simple, and the cost of components is low, so that the manufacturing cost is low, and the market competitiveness is effectively improved.
[0041] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them, and those skilled in the art can modify the technical solutions described in the above embodiments or replace some technical features with equivalent ones; all these modifications and replacements should belong to the protection scope of the appended claims of the present application.
Claims
1. A GNSS signal relay system, characterized in that, include: First antenna, second antenna, input switching switch, gain adjustment module, control module, power divider, output switching switch, multiple output module and bias module; Both the first antenna and the second antenna are connected to the input terminal of the input switching switch. The output terminal of the input switching switch is connected to the input terminal of the gain adjustment module. The output terminal of the gain adjustment module is connected to the input terminal of the power divider. The output terminal of the power divider is connected to multiple output modules. The input switching switch, the gain adjustment module, and the output switching switch are all connected to the control terminal of the control module. The bias module is connected to the input switching switch, the output switching switch, and the control module.
2. The GNSS signal relay system according to claim 1, characterized in that, The first antenna is a GNSS antenna, and the second antenna is an anti-jamming antenna.
3. The GNSS signal relay system according to claim 1, characterized in that, The gain adjustment module includes an amplifier and an attenuator. The input terminal of the amplifier is connected to the output terminal of the input switching switch, the output terminal of the amplifier is connected to the input terminal of the attenuator, and the output terminal of the attenuator is connected to the input terminal of the power divider.
4. The GNSS signal relay system according to claim 3, characterized in that, The amplifier is an LNA amplifier.
5. The GNSS signal relay system according to claim 3, characterized in that, The attenuator is an adjustable attenuator with an adjustable range of 0-60dB.
6. The GNSS signal relay system according to claim 1, characterized in that, The power divider includes a first power divider circuit, a second power divider circuit, and a third power divider circuit. The input terminal of the first power divider circuit is connected to the output terminal of the gain adjustment module. The first output terminal of the first power divider circuit is connected to the input terminal of the second power divider circuit. The second output terminal of the first power divider circuit is connected to the input terminal of the third power divider circuit. The output terminals of the second power divider circuit and the third power divider circuit are respectively connected to multiple output modules.
7. The GNSS signal relay system according to claim 1, characterized in that, The bias module includes a first biaser, a second biaser, and a third biaser. The output terminal of the first biaser is connected to the first antenna, the output terminal of the second biaser is connected to the second antenna, and the output terminal of the third biaser is connected to the output switching switch.
8. The GNSS signal relay system according to claim 1, characterized in that, It also includes a display, which is connected to the control module.
9. The GNSS signal relay system according to claim 1, characterized in that, It also includes buttons and a serial port, both of which are connected to the control module.
10. The GNSS signal relay system according to claim 1, characterized in that, The power divider includes a 4-channel output module, and the power divider has four outputs that can be connected to the 4-channel output module respectively via the output switching switch.