Wireless low-noise amplification system, V2X system and vehicle

Abstract

The utility model discloses a wireless low-noise amplification system, a V2X system and a vehicle, and relates to the technical field of vehicles, the wireless low-noise amplification system comprises a signal input end, an input matching network, a low-noise amplification circuit and an output matching network, and the signal input end is used for receiving a wireless signal; the input end of the input matching network is connected with the signal input end, and the input matching network is used for receiving a wireless signal of the signal input end; the input end of the low-noise amplification circuit is connected with the output end of the input matching network, and the input matching network is used for enabling impedance input to the low-noise amplification circuit to be matched with impedance of the low-noise amplification circuit; the low-noise amplification circuit is used for amplifying the received signal; the input end of the output matching network is connected with the output end of the low-noise amplification circuit; and the output matching network is used for matching the output impedance with the impedance of an external circuit. According to the technical scheme provided by the invention, the effective distance of communication is improved by reducing the transmission loss and distortion of the signal.

Description

Technical Field

[0001] This application relates to the technical field of transportation vehicles, and particularly to a wireless low-noise amplification system and a V2X system. Background Art

[0002] For autonomous / assisted driving vehicles, they need to obtain more real-time information around the vehicle. For this reason, the intelligent transportation vehicle-to-everything (V2X) technology has emerged. V2X stands for Vehicle-to-Everything, which means the connection between the vehicle and anything. Specifically, it is a technology in which a vehicle communicates with vehicles, people, and objects around it through sensors and network communication technologies, and analyzes and makes decisions based on the collected information. Among them, the V2X antenna is the spatial interface for direct communication between traffic participants.

[0003] In an in-vehicle V2X system, a passive antenna solution is a common configuration, which involves using passive antenna elements to receive and transmit wireless signals. However, using long radio frequency cables to connect these antennas to the in-vehicle transceiver will introduce significant signal loss, which will reduce the signal strength and thus reduce the effective communication distance. Summary of the Utility Model

[0004] The main purpose of this application is to propose a wireless low-noise amplification system and a V2X system, aiming to solve the problem that the effective communication distance of the existing in-vehicle V2X system is reduced due to significant signal loss.

[0005] To achieve the above purpose, the wireless low-noise amplification system proposed in this application includes:

[0006] A signal input end, which is used to receive wireless signals;

[0007] An input matching network, the input end of which is connected to the signal input end, and the input matching network is used to receive the wireless signals from the signal input end;

[0008] A low-noise amplification circuit, the input end of which is connected to the output end of the input matching network, and the input matching network is used to match the impedance input to the low-noise amplification circuit with the impedance of the low-noise amplification circuit; the low-noise amplification circuit is used to amplify the received signals;

[0009] An output matching network, the input end of which is connected to the output end of the low-noise amplification circuit; the output matching network is used to match the output impedance with the impedance of the external circuit.

[0010] In one embodiment, the wireless low-noise amplification system further includes a voltage stabilization circuit. The output end of the voltage stabilization circuit is connected to the low-noise amplification circuit, and the input end of the voltage stabilization circuit is connected to an external circuit.

[0011] In one embodiment, the signal input end includes a V2X antenna, and the V2X antenna is used to receive wireless signals to the input matching network.

[0012] In one embodiment, the input matching network includes a first L-shaped matching network, and the output matching network includes a second L-shaped matching network.

[0013] In one embodiment, the input matching network includes a seventh capacitor, an eighth capacitor, a fifth inductor, a third inductor, and a sixth inductor. The input end of the seventh capacitor is connected to the signal input end, the output end of the seventh capacitor is connected to the input end of the eighth capacitor, and the output end of the eighth capacitor is connected to the input end of the input matching network; one end of the fifth inductor is connected to the input end of the seventh capacitor, and the other end of the fifth inductor is grounded; one end of the third inductor is connected to the input end of the seventh capacitor, the other end of the third inductor is connected to the output end of the seventh capacitor, one end of the sixth inductor is connected to the output end of the seventh capacitor, and the other end of the sixth inductor is grounded.

[0014] In one embodiment, the output matching network includes a ninth capacitor, a tenth capacitor, an eleventh capacitor, a seventh inductor, a fourth inductor, and an eighth inductor. The input end of the ninth capacitor is connected to the output end of the low-noise amplification circuit, the output end of the ninth capacitor is connected to the input end of the tenth capacitor, the output end of the tenth capacitor is connected to the input end of the eleventh capacitor, and the output end of the eleventh capacitor is connected to an external circuit; one end of the seventh inductor is connected to the output end of the ninth capacitor, and the other end of the seventh inductor is grounded; one end of the fourth inductor is connected to the output end of the ninth capacitor, the other end of the fourth inductor is connected to the output end of the tenth capacitor, one end of the eighth inductor is connected to the output end of the tenth capacitor, and the other end of the eighth inductor is grounded.

[0015] In one embodiment, the low-noise amplification circuit includes a low-noise amplifier.

[0016] In one embodiment, the voltage stabilizing circuit includes a resistor, a third capacitor, a fourth capacitor, a first capacitor, a second capacitor, a fifth capacitor, a sixth capacitor, a transient voltage suppressor, a voltage regulator, a first inductor, and a second inductor. One end of the resistor is connected to the low-noise amplifier circuit, and the other end of the resistor is connected to the first inductor. The third capacitor and the fourth capacitor are connected in series between the resistor and the first inductor, and the third capacitor and the fourth capacitor are grounded after being connected; the low-noise amplifier circuit is grounded; one end of the voltage regulator is connected between the inductor and the first inductor, and the other end of the voltage regulator is connected to one end of the second inductor, and the other end of the second inductor is connected to an external circuit; the transient voltage suppressor, the first capacitor, the second capacitor, the fifth capacitor, and the sixth capacitor are respectively connected in parallel with the voltage regulator.

[0017] The present application also provides a V2X system, including the wireless low-noise amplifier system as described above.

[0018] The present application also provides a vehicle, including the V2X system as described above.

[0019] The technical solution of the present application receives a wireless signal through a signal input end; connects the input end of the input matching network to the signal input end, and the input matching network is used to receive the wireless signal of the signal input end; connects the input end of the low-noise amplifier circuit to the output end of the input matching network, and the input matching network is used to match the impedance input to the low-noise amplifier circuit with the impedance of the low-noise amplifier circuit; the low-noise amplifier circuit is used to amplify the received signal; connects the input end of the output matching network to the output end of the low-noise amplifier circuit; the output matching network is used to match the output impedance with the impedance of the external circuit. The input matching network ensures that during the transmission of the signal from the signal input end to the external circuit, the impedance changes smoothly, thereby reducing signal reflection and transmission loss and improving the signal reception efficiency. Provide sufficient gain while maintaining a low-noise characteristic as much as possible. The input end of the low-noise amplifier circuit is connected to the output end of the input matching network, and the input matching network ensures impedance matching of the signal received by the low-noise amplifier circuit to achieve maximum signal power transmission. After the low-noise amplifier circuit amplifies the signal, the output matching network further transmits the amplified signal to the external circuit. Connecting the input end of the output matching network to the output end of the low-noise amplifier circuit can ensure that the output impedance of the low-noise amplifier circuit matches the input impedance of the external circuit, thereby reducing signal loss and distortion during transmission, so that the wireless low-noise amplifier system can achieve longer-distance communication or more sensitive signal detection. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 This is a circuit diagram of an embodiment of the wireless low-noise amplification system provided by the present application;

[0022] Figure 2 This is another circuit diagram of an embodiment of the wireless low-noise amplification system provided by the present application;

[0023] Figure 3 This is a schematic structural diagram of the signal input end of an embodiment of the wireless low-noise amplification system provided by the present application.

[0024] Explanation of the reference numerals in the drawings:

[0025] 100, signal input end; 200, input matching network; 300, low-noise amplification circuit; 400, output matching network; 500, voltage stabilization circuit; 600, external circuit; C1, first capacitor; C2, second capacitor; C3, third capacitor; C4, fourth capacitor; C5, fifth capacitor; C6, sixth capacitor; C7, seventh capacitor; C8, eighth capacitor; C9, ninth capacitor; C10, tenth capacitor; C11, eleventh capacitor; L1, first inductor; L2, second inductor; L3, third inductor; L4, fourth inductor; L5, fifth inductor; L6, sixth inductor; L7, seventh inductor; L8, eighth inductor; R1, resistor; VR1, voltage regulator; TVS, transient voltage suppressor.

[0026] The realization of the purpose of the present application, functional features and advantages will be further described in conjunction with the embodiments with reference to the drawings. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0028] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0030] The present application proposes a wireless low-noise amplification system.

[0031] Please refer to Figures 1 to 3 , in an embodiment of the present application, the wireless low-noise amplification system includes a signal input terminal 100, an input matching network 200, a low-noise amplification circuit 300 (Low Noise Amplifier, LNA), and an output matching network 400. The signal input terminal 100 is used to receive wireless signals; the input end of the input matching network 200 is connected to the signal input terminal 100, and the input matching network 200 is used to receive the wireless signals of the signal input terminal 100; the input end of the low-noise amplification circuit 300 is connected to the output end of the input matching network 200, and the input matching network 200 is used to make the impedance input to the low-noise amplification circuit 300 match the impedance of the low-noise amplification circuit 300; the low-noise amplification circuit 300 is used to amplify the received signals; the input end of the output matching network 400 is connected to the output end of the low-noise amplification circuit 300; the output matching network 400 is used to make the output impedance match the impedance of the external circuit 600.

[0032] In the above structure, a wireless signal is received by using the signal input terminal 100; the input end of the input matching network 200 is connected to the signal input terminal 100, and the input matching network 200 is used to receive the wireless signal of the signal input terminal 100; the input end of the low-noise amplification circuit 300 is connected to the output end of the input matching network 200, and the input matching network 200 is used to match the impedance input to the low-noise amplification circuit 300 with the impedance of the low-noise amplification circuit 300; the low-noise amplification circuit 300 is used to amplify the received signal; the input end of the output matching network 400 is connected to the output end of the low-noise amplification circuit 300; the output matching network 400 is used to match the output impedance with the impedance of the external circuit 600. The input matching network 200 ensures that during the transmission of the signal from the signal input terminal 100 to the external circuit 600, the impedance changes smoothly, thereby reducing signal reflection and transmission loss and improving the signal reception efficiency. It provides sufficient gain while maintaining low-noise characteristics as much as possible. The input end of the low-noise amplification circuit 300 is connected to the output end of the input matching network 200, and the input matching network 200 ensures impedance matching of the signal received by the low-noise amplification circuit 300 to achieve maximum signal power transmission. After the low-noise amplification circuit 300 amplifies the signal, the output matching network 400 further transmits the amplified signal to the external circuit 600. The input end of the output matching network 400 is connected to the output end of the low-noise amplification circuit 300, which can ensure the matching of the output impedance of the low-noise amplification circuit 300 with the input impedance of the external circuit 600, thereby reducing signal loss and distortion during transmission, so that the wireless low-noise amplification system can achieve longer-distance communication or more sensitive signal detection. The wireless low-noise amplification system uses a single-stage low-noise amplification circuit 300 as the topology structure, in cooperation with the input matching network 200 and the output matching circuit. When the wireless low-noise amplification system is used in a vehicle-mounted V2X system, it can solve the problem of reduced effective communication distance caused by significant signal loss in the existing vehicle-mounted V2X system and meet the performance requirements.

[0033] In one embodiment, the wireless low-noise amplification system further includes a voltage stabilization circuit 500. The output end of the voltage stabilization circuit 500 is connected to the low-noise amplification circuit 300, and the input end of the voltage stabilization circuit 500 is connected to the external circuit 600. The voltage stabilization circuit 500 is used to provide a stable voltage signal for the low-noise amplification circuit 300. Since the low-noise amplification circuit 300 is very sensitive to power supply fluctuations, the voltage stabilization circuit 500 ensures the stability of the power supply voltage, avoids interference of power supply noise on the amplified signal, and thus can improve the stability of the entire wireless low-noise amplification system.

[0034] In one embodiment, the signal input terminal 100 includes a V2X (Vehicle-to-Everything) antenna (labeled as ANT in the figure), and the V2X antenna is used to receive wireless signals to the input matching network 200. The V2X antenna is responsible for receiving wireless signals to the input matching network 200 and is also used to receive signals from other V2X devices. The V2X antenna uses the input matching network 200 to achieve impedance matching to ensure the effective transmission of signals and reduce reflection losses. And the V2X antenna needs to have sufficient bandwidth to support high-speed data transmission to meet the requirements of V2X communication. The circuit structure formed by the input matching network 200, the low-noise amplifier circuit 300 (Low Noise Amplifier, LNA), and the output matching network 400 is placed on the back of the antenna, and its structure is simple, reducing the circuit cost.

[0035] In one embodiment, the input matching network 200 includes a first L-type matching network, and the output matching network 400 includes a second L-type matching network. Both the input matching network 200 and the output matching network 400 adopt L-type matching networks, which helps to achieve efficient impedance matching and improve the signal transmission efficiency; the L-type matching network can achieve impedance conversion through its specific combination of circuit elements, for example, at least including an inductor and a capacitor, to ensure the effective transmission of signals between circuit structures with different impedances (i.e., between the signal input terminal 100 and the low-noise amplifier circuit 300). The first L-type matching network is connected to the V2X antenna, used to receive the signal output by the V2X antenna, and match the impedance of the V2X antenna to the input impedance of the low-noise amplifier circuit 300, reducing signal reflection and transmission losses. The second L-type matching network is located after the low-noise amplifier circuit 300, and matches the output impedance of the low-noise amplifier circuit 300 to the input impedance of the subsequent circuit (i.e., the external circuit 600). Ensure that the signal amplified by the low-noise amplifier circuit 300 can be effectively transmitted to the next component in the receiving link.

[0036] In one embodiment, the input matching network 200 includes a seventh capacitor C7, an eighth capacitor C8, a fifth inductor L5, a third inductor L3, and a sixth inductor L6. The input terminal of the seventh capacitor C7 is connected to the signal input terminal 100. The output terminal of the seventh capacitor C7 is connected to the input terminal of the eighth capacitor C8. The output terminal of the eighth capacitor C8 is connected to the input terminal of the input matching network 200. One end of the fifth inductor L5 is connected to the input terminal of the seventh capacitor C7, and the other end of the fifth inductor L5 is grounded. One end of the third inductor L3 is connected to the input terminal of the seventh capacitor C7, and the other end of the third inductor L3 is connected to the output terminal of the seventh capacitor C7. One end of the sixth inductor L6 is connected to the output terminal of the seventh capacitor C7, and the other end of the sixth inductor L6 is grounded. The seventh capacitor C7 serves as the input capacitor of the signal. The input terminal of the seventh capacitor C7 is connected to the signal source, that is, the V2X antenna. The output terminal of the seventh capacitor C7 is connected to the input terminal of the eighth capacitor C8 and serves as part of the signal path. The eighth capacitor C8 is connected between the output terminal of the seventh capacitor C7 and the input terminal of the input matching network 200 and forms a signal transmission path together with the seventh capacitor C7. The fifth inductor L5 is connected between the input terminal of the seventh capacitor C7 and the ground and is used to provide the necessary inductive load for the signal. The third inductor L3 is connected between the input terminal and the output terminal of the seventh capacitor C7 to form a parallel inductor for implementing a preset impedance transformation. The sixth inductor L6 is connected between the output terminal of the seventh capacitor C7 and the ground and, similar to the fifth inductor L5, is used to provide an inductive load for the signal. The L-type matching network forms a complex impedance matching path through the combination of inductors and capacitors. By combining the seventh capacitor C7, the eighth capacitor C8, the fifth inductor L5, the third inductor L3, and the sixth inductor L6, and by adjusting the element values of the first L-type matching network, the impedance between the signal source and the input matching network 200 can be adjusted to maximize the energy transfer efficiency and reduce reflections.

[0037] In one embodiment, the output matching network 400 includes a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a seventh inductor L7, a fourth inductor L4, and an eighth inductor L8. The input end of the ninth capacitor C9 is connected to the output end of the low-noise amplifier circuit 300. The output end of the ninth capacitor C9 is connected to the input end of the tenth capacitor C10. The output end of the tenth capacitor C10 is connected to the input end of the eleventh capacitor C11. The output end of the eleventh capacitor C11 is connected to the external circuit 600. One end of the seventh inductor L7 is connected to the output end of the ninth capacitor C9, and the other end of the seventh inductor L7 is grounded. One end of the fourth inductor L4 is connected to the output end of the ninth capacitor C9, and the other end of the fourth inductor L4 is connected to the output end of the tenth capacitor C10. One end of the eighth inductor L8 is connected to the output end of the tenth capacitor C10, and the other end of the eighth inductor L8 is grounded. The ninth capacitor C9, as the first component for the signal from the noise amplifier circuit to the output matching network 400, has its input end connected to the output end of the low-noise amplifier circuit 300 and its output end connected to the input end of the tenth capacitor C10. The tenth capacitor C10 receives the signal from the ninth capacitor C9 and transfers the signal to the eleventh capacitor C11. The eleventh capacitor C11 is the last capacitor component on the signal path, and its output end is connected to the external circuit 600. The seventh inductor L7 is connected between the output end of the ninth capacitor C9 and the ground, and is used to provide the necessary inductive load for the signal. The fourth inductor L4 is connected between the output end of the ninth capacitor C9 and the output end of the tenth capacitor C10 to form a parallel inductor for implementing a preset impedance transformation. The eighth inductor L8 is connected between the output end of the tenth capacitor C10 and the ground, and is used to provide the inductive load for the signal. The ninth capacitor C9, the tenth capacitor C10, the eleventh capacitor C11, the seventh inductor L7, the fourth inductor L4, and the eighth inductor L8 are combined to form a complex impedance matching path to achieve the required impedance transformation.

[0038] Both the input matching network 200 and the output matching network 400 include a tuning network for selecting signals of a specific frequency to pass through. That is to say, both the input network and the output network include a matching network and a tuning network. The tuning network is mainly used to select signals of a specific frequency, while the matching network is mainly used to optimize impedance matching.

[0039] In one embodiment, the low-noise amplifier circuit 300 includes a low-noise amplifier. The main function of an existing low-noise amplifier is to amplify the received weak signal. The low-noise amplifier has a low noise figure, and the additional noise introduced while amplifying the signal is controlled to the lowest level.

[0040] In one embodiment, the low-noise amplifier circuit 300 includes a bipolar junction transistor (BJT) or a field-effect transistor (FET). A transistor conducts electricity by using both holes and electrons, so it is called a bipolar transistor. The transistor, as a gain element, can control a large current flowing through the collector and the emitter by applying a small current or voltage between the base and the emitter. The field-effect transistor FET mainly conducts electricity by using one type of carrier (electrons or holes), so it is called a unipolar transistor, and controls the current between the source and the drain by applying a voltage to the gate. A transistor with a low noise figure is selected, the power supply line and the ground line of the low-noise amplifier circuit 300 are arranged reasonably to avoid electromagnetic interference, and the path length of the signal in the system is shortened as much as possible to reduce the introduction of noise.

[0041] In one embodiment, the voltage regulator circuit 500 includes a low-dropout linear regulator circuit. The low-dropout linear regulator circuit includes a resistor R1, a third capacitor C3, a fourth capacitor C4, a first capacitor C1, a second capacitor C2, a fifth capacitor C5, a sixth capacitor C6, a transient voltage suppressor TVS, a voltage regulator VR1, a first inductor L1, and a second inductor L2. One end of the resistor R1 is connected to the low-noise amplifier circuit 300, and the other end of the resistor R1 is connected to the first inductor L1. A third capacitor C3 and a fourth capacitor C4 are connected in series between the resistor R1 and the first inductor L1, and the third capacitor C3 and the fourth capacitor C4 are grounded after being connected; the low-noise amplifier circuit 300 is grounded; one end of the voltage regulator VR1 is connected between the inductor and the first inductor L1, the other end of the voltage regulator VR1 is connected to one end of the second inductor L2, and the other end of the second inductor L2 is connected to the external circuit 600; the transient voltage suppressor TVS and the first capacitor C1, the second capacitor C2, the fifth capacitor C5, and the sixth capacitor C6 are respectively connected in parallel with the voltage regulator VR1. The resistor R1 connected in series between the low-noise amplifier circuit 300 and the first inductor L1 is used to limit the current; the transient voltage suppressor TVS is used to protect the low-noise amplifier circuit 300 from voltage surges. The first capacitor C1, the second capacitor C2, the fifth capacitor C5, and the sixth capacitor C6 are connected in parallel with the voltage regulator VR1 to filter out the noise of the external power supply circuit and provide a stable power supply. The parallel use of multiple capacitors can provide noise suppression and power filtering in a wider frequency band; grounding the low-noise amplifier circuit 300 ensures that the low-noise amplifier circuit 300 has a stable reference potential, which helps to improve the stability and performance of the low-noise amplifier circuit 300. Among them, the voltage regulator uses a low-dropout regulator (LDO).

[0042] In addition, by selecting transistors with stable gain and adding a negative feedback network to the low-noise amplifier circuit 300, the fluctuation of the gain can be suppressed; by using a low-dropout linear voltage regulator circuit for power supply, the power supply voltage for the low-noise amplifier circuit 300 can be ensured to be stable.

[0043] The technical solution of this application receives a wireless signal through the signal input terminal 100; connects the input end of the input matching network 200 to the signal input terminal 100, and the input matching network 200 is used to receive the wireless signal from the signal input terminal 100; connects the input end of the low-noise amplifier circuit 300 to the output end of the input matching network 200, and the input matching network 200 is used to match the impedance input to the low-noise amplifier circuit 300 with the impedance of the low-noise amplifier circuit 300; the low-noise amplifier circuit 300 is used to amplify the received signal; connects the input end of the output matching network 400 to the output end of the low-noise amplifier circuit 300; the output matching network 400 is used to match the output impedance with the impedance of the external circuit 600. The input matching network 200 ensures that during the transmission of the signal from the signal input terminal 100 to the external circuit 600, the impedance changes smoothly, thereby reducing signal reflection and transmission loss and improving the signal reception efficiency. Provide sufficient gain while maintaining low-noise characteristics as much as possible. The input end of the low-noise amplifier circuit 300 is connected to the output end of the input matching network 200, and the input matching network 200 ensures impedance matching of the signal received by the low-noise amplifier circuit 300 to achieve maximum signal power transmission. After the low-noise amplifier circuit 300 amplifies the signal, the output matching network 400 further transmits the amplified signal to the external circuit 600. Connecting the input end of the output matching network 400 to the output end of the low-noise amplifier circuit 300 can ensure that the output impedance of the low-noise amplifier circuit 300 matches the input impedance of the external circuit 600, thereby reducing signal loss and distortion during transmission, so that the wireless low-noise amplification system can achieve longer-distance communication or more sensitive signal detection.

[0044] This application also proposes a V2X system, which includes a wireless low-noise amplification system. The specific structure of the wireless low-noise amplification system refers to the above-mentioned embodiments. Since this V2X system adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one.

[0045] This application also proposes a vehicle, which includes a V2X system. The specific structure of the V2X system refers to the above-mentioned embodiments. Since this vehicle adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one.

[0046] The above are only exemplary embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A wireless low-noise amplification system, characterized in that, Comprising: A signal input terminal for receiving a wireless signal; An input matching network, the input end of which is connected to the signal input terminal, and the input matching network is used to receive the wireless signal from the signal input terminal; A low-noise amplification circuit, the input end of which is connected to the output end of the input matching network, and the input matching network is used to match the impedance input to the low-noise amplification circuit with the impedance of the low-noise amplification circuit; the low-noise amplification circuit is used to amplify the received signal; An output matching network, the input end of which is connected to the output end of the low-noise amplification circuit; the output matching network is used to match the output impedance with the impedance of an external circuit.

2. The wireless low-noise amplification system according to claim 1, wherein The wireless low-noise amplification system further includes a voltage stabilization circuit, the output end of which is connected to the low-noise amplification circuit, and the input end of which is connected to an external circuit.

3. The wireless low-noise amplification system according to claim 1, wherein The signal input terminal includes a V2X antenna for receiving a wireless signal to the input matching network.

4. The wireless low-noise amplification system according to any one of claims 1 to 3, characterized in that The input matching network includes a first L-shaped matching network, and the output matching network includes a second L-shaped matching network.

5. The wireless low-noise amplification system according to any one of claims 1 to 3, characterized in that The input matching network includes a seventh capacitor, an eighth capacitor, a fifth inductor, a third inductor, and a sixth inductor. The input end of the seventh capacitor is connected to the signal input terminal, the output end of the seventh capacitor is connected to the input end of the eighth capacitor, and the output end of the eighth capacitor is connected to the input end of the input matching network; one end of the fifth inductor is connected to the input end of the seventh capacitor, and the other end of the fifth inductor is grounded; one end of the third inductor is connected to the input end of the seventh capacitor, the other end of the third inductor is connected to the output end of the seventh capacitor, one end of the sixth inductor is connected to the output end of the seventh capacitor, and the other end of the sixth inductor is grounded.

6. The wireless low-noise amplification system according to claim 4, wherein, The output matching network includes a ninth capacitor, a tenth capacitor, an eleventh capacitor, a seventh inductor, a fourth inductor, and an eighth inductor. The input end of the ninth capacitor is connected to the output end of the low-noise amplification circuit, the output end of the ninth capacitor is connected to the input end of the tenth capacitor, the output end of the tenth capacitor is connected to the input end of the eleventh capacitor, and the output end of the eleventh capacitor is connected to an external circuit; one end of the seventh inductor is connected to the output end of the ninth capacitor, and the other end of the seventh inductor is grounded; one end of the fourth inductor is connected to the output end of the ninth capacitor, the other end of the fourth inductor is connected to the output end of the tenth capacitor, one end of the eighth inductor is connected to the output end of the tenth capacitor, and the other end of the eighth inductor is grounded.

7. The wireless low-noise amplification system according to any one of claims 1 to 3, characterized in that The low-noise amplification circuit includes a low-noise amplifier.

8. The wireless low-noise amplification system according to claim 2, wherein The voltage stabilizing circuit includes a resistor, a third capacitor, a fourth capacitor, a first capacitor, a second capacitor, a fifth capacitor, a sixth capacitor, a transient voltage suppressor, a voltage regulator, a first inductor, and a second inductor. One end of the resistor is connected to the low-noise amplifier circuit, and the other end of the resistor is connected to the first inductor. The third capacitor and the fourth capacitor are connected in series between the resistor and the first inductor, and the third capacitor and the fourth capacitor are grounded after being connected; The low-noise amplifier circuit is grounded; one end of the voltage regulator is connected between the inductor and the first inductor, the other end of the voltage regulator is connected to one end of the second inductor, and the other end of the second inductor is connected to an external circuit; the transient voltage suppressor, the first capacitor, the second capacitor, the fifth capacitor, and the sixth capacitor are respectively connected in parallel with the voltage regulator.

9. A V2X system, characterized in that, It includes the wireless low-noise amplifier system according to any one of claims 1 to 8.

10. A vehicle, characterized in that, It includes the V2X system according to claim 9.

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