CN117639834B - Antenna circuit and OBU equipment - Google Patents
Antenna circuit and OBU equipment Download PDFInfo
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Abstract
The application discloses an antenna circuit and OBU equipment, wherein the antenna circuit comprises a V2X passive antenna, a first signal amplifying circuit, a power supply circuit and a signal control circuit, the V2X passive antenna comprises a V2X main antenna and a V2X auxiliary antenna, and two ends of the first signal amplifying circuit are respectively connected with the V2X main antenna and a V2X main antenna coaxial cable for receiving or transmitting radio frequency signals; the power supply circuit and the signal control circuit are respectively coupled to the V2X main antenna coaxial cable and the V2X auxiliary antenna coaxial cable and used for transmitting a power supply and control signals. The application provides the antenna circuit suitable for the on-board OBU equipment, and the number of antenna cables is not increased.
Description
Technical Field
The application relates to the technical field of automatic driving, in particular to an antenna circuit and OBU (on-board unit) equipment.
Background
V2X is used as an implementation technology of vehicle-road cooperation, can greatly improve traffic running efficiency, and is widely applied to the field of automatic driving at present. The OBU device is installed on the vehicle as the terminal of V2X, can realize the communication between car and car, car and road. The OBU device is generally composed of a V2X host, an external antenna, and corresponding peripheral power supply functional units, as shown in fig. 1.
The power supply of OBU equipment is provided by the vehicle battery, and V2X host computer accomplishes communication signal and corresponding protocol processing, and the antenna accomplishes wireless signal's transceiver function. In particular to a V2X antenna, the V2X antenna is generally composed of two independent passive V2X antennas, as shown in figure 2, a main antenna receives and transmits signals, and an auxiliary antenna only receives signals; two radio frequency cables with the length of 5m are arranged outside the antenna, and a vehicle-gauge Fakra connector is generally adopted.
In the related art, an OBU device host is usually installed in a vehicle, and a V2X passive antenna is installed and fixed at a roof position through a cable, but because the V2X radio frequency works at a frequency of 5.9GHz, the frequency band is higher, the attenuation of the radio frequency cable to a signal is very large, and especially when the vehicle type is relatively large, the cable may have a length of 5 meters, the corresponding attenuation can reach approximately 10dB, and thus the communication distance can be reduced to 1/3 of the original communication distance.
In the related art, the communication distance can be improved by increasing the transmitting power, but the V2X protocol standard has clear requirements on the transmitting power of the terminal, namely, the maximum transmitting power is 23 dBm+/-2 dBm, so that the transmitting power cannot be increased continuously at the transmitting end of the OBU module, an amplifier can be added at the V2X antenna end only, but the amplifier is added at the antenna end, and a power supply line and a protocol signal control line are required to be added, so that the difficulty and the complexity of antenna installation are increased.
Disclosure of Invention
The embodiment of the application provides an antenna circuit and OBU equipment, which are suitable for vehicle-mounted OBU equipment, and meanwhile, the number of antenna cables is not increased.
The embodiment of the application adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides an antenna circuit, where the antenna circuit includes a V2X passive antenna, a first signal amplifying circuit, a power supply circuit, and a signal control circuit, the V2X passive antenna includes a V2X main antenna and a V2X auxiliary antenna,
The two ends of the first signal amplifying circuit are respectively connected with the V2X main antenna and the V2X main antenna coaxial cable and are used for receiving or transmitting radio frequency signals;
the power supply circuit and the signal control circuit are respectively coupled to the V2X main antenna coaxial cable and the V2X auxiliary antenna coaxial cable and used for transmitting a power supply and control signals.
In some embodiments, the V2X main antenna coaxial cable is connected with the V2X main antenna and is coupled with the power supply circuit for supplying power to the first signal amplifying circuit,
The V2X auxiliary antenna coaxial cable is connected with the V2X auxiliary antenna and coupled with the signal control circuit, and is used for transmitting control signals to the first signal amplification circuit.
In some embodiments, the first signal amplifying circuit includes a transmit amplifying circuit and a receive amplifying circuit,
Transmitting signals of the V2X host to the V2X main antenna for transmission through the transmission amplifying circuit;
And transmitting the signal received by the V2X main antenna to a V2X host through the receiving and amplifying circuit.
In some embodiments, further comprising: a second signal amplifying circuit is provided with a second signal amplifying circuit,
And two ends of the second signal amplifying circuit are respectively connected with the V2X auxiliary antenna and the V2X auxiliary antenna coaxial cable for receiving radio frequency signals.
In some embodiments, the first signal amplifying circuit further comprises: a first transceiver circuit switch and a second transceiver circuit switch,
The signals received in the V2X main antenna are isolated into two paths for signal amplification through the first transceiving circuit change-over switch and the second transceiving circuit change-over switch, and the two paths of signals are combined at an antenna transmitting end;
And the signals sent out by the V2X main antenna are isolated into two paths through the first transceiving circuit change-over switch and the second transceiving circuit change-over switch, the signals are amplified respectively, and the two paths of signals are combined at the antenna transmitting end.
In some embodiments, the power supply circuit includes a first capacitor, a second capacitor and a power conversion module,
The first capacitor is used for isolating a direct current power supply transmitted by a cable and outputting the direct current power supply to a power input end of an antenna, isolating a radio frequency signal transmitted by the cable and coupling the radio frequency signal to the first signal amplifying circuit through the first capacitor;
the power supply conversion module is used for respectively providing power supply to the signal amplifying circuits of the V2X main antenna and the V2X auxiliary antenna;
The second capacitor is used for filtering the input power supply.
In some embodiments, the signal control circuit is further configured to
The V2X auxiliary antenna and the V2X auxiliary antenna adopt the same coaxial cable and are coupled to a V2X radio frequency receiving signal for control signal transmission;
The control signal is separated in the channel of the V2X auxiliary antenna and then sent to the change-over switch of the first signal amplifying circuit.
In some embodiments, the power supply circuit is further configured to
The V2X main antenna and the V2X main antenna adopt the same coaxial cable and are coupled to a V2X radio frequency receiving signal to be used as a power supply of the first signal amplifying circuit;
the power supply is separated from the channel of the V2X main antenna, and is used for supplying power to the change-over switch and the amplifying circuit in the first signal amplifying circuit respectively.
In some embodiments, the power supply circuit is coupled to the same coaxial cable as the V2X primary antenna coaxial cable, and the signal control circuit is coupled to the same coaxial cable as the V2X secondary antenna coaxial cable.
In a second aspect, an embodiment of the present application further provides an OBU device, including the antenna circuit described in the first aspect.
The above at least one technical scheme adopted by the embodiment of the application can achieve the following beneficial effects: the antenna circuit comprises a V2X passive antenna, a first signal amplifying circuit, a power supply circuit and a signal control circuit, wherein the V2X passive antenna comprises a V2X main antenna and a V2X auxiliary antenna, and the V2X passive antenna and the V2X main antenna are respectively connected with coaxial cables of the V2X main antenna and the V2X main antenna through two ends of the first signal amplifying circuit so as to receive or transmit radio frequency signals; and the power supply circuit and the signal control circuit are respectively coupled to the V2X main antenna coaxial cable and the V2X auxiliary antenna coaxial cable for transmitting a power supply and a control signal. By adding the amplifying circuit and the corresponding control signals in the antenna, the signal loss caused by long-line transmission is effectively compensated, and the communication distance between V2X devices is further increased.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
Fig. 1 is a schematic structural diagram of a vehicle-mounted OBU device in the related art;
Fig. 2 is a schematic diagram of a passive main and auxiliary antenna structure of V2X in the related art;
FIG. 3 is a schematic diagram of an antenna circuit according to an embodiment of the present application;
fig. 4 is a schematic circuit diagram of an antenna circuit according to an embodiment of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
As shown in fig. 3, an antenna circuit 300 in the embodiment of the present application, where the antenna circuit includes a V2X passive antenna 310, a first signal amplifying circuit 320, a power supply circuit 330, and a signal control circuit 340, where the V2X passive antenna 310 includes a V2X main antenna 3101 and a V2X auxiliary antenna 3102, and two ends of the first signal amplifying circuit 320 are connected to the V2X main antenna 3101 and the V2X main antenna coaxial cable 350, respectively, so as to receive or transmit radio frequency signals; the power supply circuit 330 and the signal control circuit 320 are coupled to the V2X main antenna coaxial cable 350 and the V2X auxiliary antenna coaxial cable 360, respectively, for transmitting power supply and control signals. The first signal amplifying circuit 320 is used for receiving or transmitting radio frequency signals, and the power supply and the signal control are performed through the power supply circuit 330 and the signal control circuit 320 which are respectively coupled to coaxial cables. Namely, by adding the receiving and transmitting power amplifier and the corresponding control circuit at the V2X antenna end, the power loss caused by long-line transmission can be compensated, and the communication distance of the OBU equipment can be well improved.
With continued reference to fig. 3, the V2X main antenna coaxial cable 350 and the V2X auxiliary antenna coaxial cable 360 may be connected to the V2X main and auxiliary antenna paths by two coaxial cables, respectively. And power is coupled to the antenna portion through the V2X main antenna coaxial cable 350 in addition to the antenna transceiver signal on the main antenna. And simultaneously, the auxiliary antenna is coupled with a control signal through the V2X auxiliary antenna coaxial cable 360 in addition to the antenna receiving signal. That is, the antenna power supply and the control signal are both coupled to the existing cable, and no additional transmission cable is needed, so that the whole vehicle wiring is facilitated.
Further, two ends of the first signal amplifying circuit are respectively connected to the V2X main antenna coaxial cable 350 and the V2X main antenna 3101, so that not only the reception of the radio frequency signal but also the transmission of the radio frequency signal can be realized at the main antenna.
The power supply circuit 330 and the signal control circuit 320 are respectively coupled to the V2X main antenna coaxial cable 350 and the V2X auxiliary antenna coaxial cable 360, so that control signals and power supply can be transmitted through the coaxial cables without increasing the number of original antennas.
By adopting the antenna circuit, the amplification of the receiving and transmitting signals is realized at the V2X antenna end, and meanwhile, the use quantity of the antennas is not increased. Considering that relatively long cables are required to be used in the OBU equipment, signal attenuation is caused, and communication distance is reduced. And two ends of the first signal amplifying circuit are respectively connected with the V2X main antenna and the V2X main antenna through coaxial cables, so that the received radio frequency signals can be amplified and enhanced, and the transmitted radio frequency signals can be amplified and enhanced.
By adopting the antenna circuit, from the perspective of saving the antenna cable, the power supply circuit and the signal control circuit are respectively coupled to the V2X main antenna coaxial cable and the V2X auxiliary antenna coaxial cable, so that the V2X main antenna is coupled with a power supply besides the antenna for receiving and transmitting signals, and the antenna part can be powered. Control signals are coupled to the V2X auxiliary antennas in addition to the antenna receive signals, so that corresponding control signals can be applied.
By adopting the antenna circuit, the amplifying circuit and the corresponding control signals are added in the antenna, so that the signal loss caused by long-line transmission is effectively compensated, and the communication distance between V2X devices is further increased. In addition, the antenna circuit is simple in design, extra cables are not needed to be added, and the whole car wiring and the antenna installation are convenient.
Unlike the prior art that an amplifier is added to the V2X antenna, a power supply line and a protocol signal control line are generally added, so that the difficulty and complexity of antenna installation are increased. By adopting the antenna circuit, the number of antennas is saved, and the installation is simplified.
In contrast to the conventional OBU device host installed in a vehicle in the related art, the V2X passive antenna is fixed at the roof position by cable installation, and the communication distance is reduced because the V2X radio frequency works at 5.9GHz frequency and has a high frequency band, and the radio frequency cable attenuates the signal greatly. By adopting the antenna circuit, under the condition of cable extension, smaller signal attenuation can be ensured, thereby ensuring the communication distance.
The antenna circuit is different from the problem that the receiving and transmitting power cannot be increased and the power loss caused by long-line transmission cannot be compensated in the related art, the antenna circuit is adopted, the two ends of the first signal amplifying circuit are respectively connected with the V2X main antenna and the V2X main antenna coaxial cable and used for receiving or transmitting radio frequency signals, smaller signal attenuation and communication distance are ensured, and meanwhile, the power supply circuit and the signal control circuit are respectively coupled to the V2X main antenna coaxial cable and the V2X auxiliary antenna coaxial cable and used for transmitting power supply and control signals, and the additional cable is not required to be added for transmitting power supply and control signals.
In one embodiment of the present application, the V2X main antenna coaxial cable is connected to the V2X main antenna and coupled to the power supply circuit for supplying power to the first signal amplifying circuit, and the V2X auxiliary antenna coaxial cable is connected to the V2X auxiliary antenna and coupled to the signal control circuit for transmitting a control signal to the first signal amplifying circuit.
The V2X main antenna coaxial cable can provide power for the first signal amplifying circuit by being connected with the V2X main antenna and being coupled with the power supply circuit. The coaxial cable matched with the V2X auxiliary antenna can transmit control signals to the first signal amplifying circuit through being connected with the V2X auxiliary antenna and being coupled with the signal control circuit.
It should be noted that power may be supplied to a plurality of devices of the first signal amplifying circuit at the same time when power is supplied. The control signal is transmitted to a plurality of devices of the first signal amplifying circuit synchronously.
In one embodiment of the present application, the first signal amplifying circuit includes a transmitting amplifying circuit and a receiving amplifying circuit, and the signal of the V2X host is transmitted to the V2X main antenna to be transmitted through the transmitting amplifying circuit; and transmitting the signal received by the V2X main antenna to a V2X host through the receiving and amplifying circuit.
In the specific implementation, the transmitting amplifying circuit consists of a power amplifier PA and a filter LPF, the PA amplifies the signal attenuated by the cable again, the LPF filters the amplified transmitting signal and transmits the signal to the antenna, in addition, the receiving amplifying circuit consists of a low-noise amplifier LNA and a filter LPF, the LNA amplifies the signal received by the antenna, and the LPF filters the amplified signal and transmits the signal to the V2X host through the cable.
It should be noted that the above-mentioned process of receiving and transmitting the radio frequency signal can be implemented by a change-over switch. In particular, the switch is capable of being powered by the power supply in response to a control signal coupled to the radio frequency signal.
In one embodiment of the present application, further comprising: and two ends of the second signal amplifying circuit are respectively connected with the V2X auxiliary antenna and the V2X auxiliary antenna coaxial cable for receiving radio frequency signals.
Referring to fig. 3, the second signal amplifying circuit is used as a V2X auxiliary antenna amplifying circuit, and since the auxiliary antenna has only a receiving channel, the auxiliary antenna does not need to be switched between receiving and transmitting, and the auxiliary antenna is directly amplified by an LNA and low pass filtered by an LPF and then sent to the V2X auxiliary antenna coaxial cable.
In one embodiment of the present application, the first signal amplifying circuit further includes: a first transceiver circuit switch and a second transceiver circuit switch,
The signals received in the V2X main antenna are isolated into two paths for signal amplification through the first transceiving circuit change-over switch and the second transceiving circuit change-over switch, and the two paths of signals are combined at an antenna transmitting end;
And the signals sent out by the V2X main antenna are isolated into two paths through the first transceiving circuit change-over switch and the second transceiving circuit change-over switch, the signals are amplified respectively, and the two paths of signals are combined at the antenna transmitting end.
Referring to fig. 4, the switch U1 and U2 are used as the transceiver circuit in the first signal amplifying circuit. The V2X adopts a TDD time division multiplexing communication mode, namely, the transmission and the reception are separated in time, so that a radio frequency switch chip is needed to separate the receiving and transmitting signals, the signals can be amplified respectively, and the two paths of signals are combined at the transmitting end of the antenna.
It should be noted that the operating frequency bands of the switch chips U1 and U2 should be able to cover the V2X frequency band, ensuring a low signal loss at 5.9G.
In one embodiment of the present application, the power supply circuit includes a first capacitor, a second capacitor, and a power conversion module, where the first capacitor is configured to isolate a dc power source transmitted through a cable and output the dc power source to a power input terminal of an antenna, isolate a radio frequency signal transmitted through the cable, and couple the radio frequency signal to the first signal amplification circuit through the first capacitor; the power supply conversion module is used for respectively providing power supply to the signal amplifying circuits of the V2X main antenna and the V2X auxiliary antenna; the second capacitor is used for filtering the input power supply.
With continued reference to fig. 4, the power supply portion is described in detail as follows:
a. the power supply part does not use a separate cable for transmission, but is coupled into the V2X radio frequency signal by means of a coaxial cable of the main antenna; thus saving one transmission line;
b. The capacitor C1 (first capacitor) plays a role in isolating direct current and coupling alternating current; direct current part: the power transmitted by the cable cannot pass through C1, can only pass through the coupling network of resistor R1 and inductance L1 and be output to the power input end of the antenna, the alternating current part: the radio frequency receiving signal transmitted by the cable cannot enter the power supply circuit through R1/L1 and can only be coupled to the antenna amplifying circuit through C1.
C. 3.3V power output by the power supply conversion module is supplied to the main antenna and the auxiliary antenna discharging circuit respectively; specifically, the main antenna power utilization part comprises two antenna switches, a receiving LNA low-noise amplifier and a transmitting PA power amplifier, and the auxiliary antenna power utilization part is a receiving LNA low-noise amplifier.
D. the capacitor C11 (second capacitor) filters the input power.
It will be appreciated that 3.3V power is by way of example only and is not intended to limit the scope of embodiments of the present application.
In one embodiment of the present application, the signal control circuit is further configured to use the same coaxial cable as the V2X auxiliary antenna, and is coupled to the V2X radio frequency receiving signal for control signal transmission; the control signal is separated in the channel of the V2X auxiliary antenna and then sent to the change-over switch of the first signal amplifying circuit.
With continued reference to fig. 4, the signal control section will be described in detail. The control signal is a low-speed periodic level signal, similar to a power supply. And the control signal is not transmitted by using an independent cable any more, but is coupled to the V2X radio frequency receiving signal by using the coaxial cable of the auxiliary antenna for transmission, so that one transmission line can be saved. Similar to the L2 and L1 roles in FIG. 4, coupling the control signal to the control circuit while blocking the RF signal from transmitting in the RF path, and similar to the C2 and C1 roles in FIG. 4, the V2X RF signal may be coupled to the antenna path for transmission while blocking the control signal in the control signal path. After the control signal is separated from the auxiliary antenna channel, the control signal is connected to the switch of the main antenna amplifying circuit to control the receiving and transmitting switching action of the switch.
In one embodiment of the present application, the power supply circuit is further configured to use the same coaxial cable as the V2X main antenna, and is coupled to the V2X rf receiving signal as the power supply of the first signal amplifying circuit; the power supply is separated from the channel of the V2X main antenna, and is used for supplying power to the change-over switch and the amplifying circuit in the first signal amplifying circuit respectively.
With continued reference to fig. 4, the power supply portion is no longer transmitting using a separate cable, but rather is transmitting via the coaxial cable of the main antenna and coupled into the V2X radio frequency signal; thus saving one transmission line.
In one embodiment of the present application, the power supply circuit is coupled to the same coaxial cable as the V2X main antenna coaxial cable, and the signal control circuit is coupled to the same coaxial cable as the V2X auxiliary antenna coaxial cable.
With continued reference to fig. 4, the antenna coaxial cable section will be described. In the specific implementation, two coaxial cables with the length of 5m are respectively connected to the V2X main and auxiliary antenna paths, and the improvement is that a power supply is coupled to the main antenna besides an antenna transceiver signal, so that power is supplied to the antenna part. The auxiliary antenna is coupled with a control signal besides the antenna receiving the signal. Therefore, the antenna power supply and the control signal are both coupled on the antenna signal, and an additional transmission cable is not needed to be added, so that the wiring of the whole vehicle is facilitated.
It should be understood that a 5m long coaxial cable is only an example and is not intended to limit the scope of embodiments of the present application.
The embodiment of the application also provides OBU equipment, which comprises the antenna circuit, wherein the antenna circuit comprises a V2X passive antenna, a first signal amplifying circuit, a power supply circuit and a signal control circuit, the V2X passive antenna comprises a V2X main antenna and a V2X auxiliary antenna,
The two ends of the first signal amplifying circuit are respectively connected with the V2X main antenna and the V2X main antenna coaxial cable and are used for receiving or transmitting radio frequency signals;
the power supply circuit and the signal control circuit are respectively coupled to the V2X main antenna coaxial cable and the V2X auxiliary antenna coaxial cable and used for transmitting a power supply and control signals.
The OBU device in the embodiment of the application adopts the antenna circuit, and realizes the amplification of the receiving and transmitting signals at the V2X antenna end without increasing the number of antennas. Considering that relatively long cables are required to be used in the OBU equipment, signal attenuation is caused, and communication distance is reduced. And two ends of the first signal amplifying circuit are respectively connected with the V2X main antenna and the V2X main antenna through coaxial cables, so that the received radio frequency signals can be amplified and enhanced, and the transmitted radio frequency signals can be amplified and enhanced.
The OBU device in the embodiment of the application adopts the antenna circuit, and from the perspective of saving an antenna cable, the power supply circuit and the signal control circuit are respectively coupled to the V2X main antenna coaxial cable and the V2X auxiliary antenna coaxial cable, so that a power supply is coupled to the V2X main antenna in addition to the antenna for receiving and transmitting signals, and the antenna part can be powered. Control signals are coupled to the V2X auxiliary antennas in addition to the antenna receive signals, so that corresponding control signals can be applied.
The OBU device in the embodiment of the application adopts the antenna circuit, and the amplifying circuit and the corresponding control signals are added in the antenna, so that the signal loss caused by long-line transmission is effectively compensated, and the communication distance between V2X devices is further increased. In addition, the antenna circuit is simple in design, extra cables are not needed to be added, and the whole car wiring and the antenna installation are convenient.
The antenna circuit adopted by the OBU device in the embodiment of the application can also have the following preferable mode:
in some embodiments, the V2X main antenna coaxial cable is connected with the V2X main antenna and is coupled with the power supply circuit for supplying power to the first signal amplifying circuit,
The V2X auxiliary antenna coaxial cable is connected with the V2X auxiliary antenna and coupled with the signal control circuit, and is used for transmitting control signals to the first signal amplification circuit.
In some embodiments, the first signal amplifying circuit includes a transmit amplifying circuit and a receive amplifying circuit,
Transmitting signals of the V2X host to the V2X main antenna for transmission through the transmission amplifying circuit;
And transmitting the signal received by the V2X main antenna to a V2X host through the receiving and amplifying circuit.
In some embodiments, further comprising: a second signal amplifying circuit is provided with a second signal amplifying circuit,
And two ends of the second signal amplifying circuit are respectively connected with the V2X auxiliary antenna and the V2X auxiliary antenna coaxial cable for receiving radio frequency signals.
In some embodiments, the first signal amplifying circuit further comprises: a first transceiver circuit switch and a second transceiver circuit switch,
And the signals received or sent by the V2X main antenna are isolated into two paths through the first transceiving circuit change-over switch and the second transceiving circuit change-over switch, the signals are amplified respectively, and the two paths of signals are combined at the antenna transmitting end.
In some embodiments, the power supply circuit includes a first capacitor, a second capacitor and a power conversion module,
The first capacitor is used for isolating a direct current power supply transmitted by a cable and outputting the direct current power supply to a power input end of an antenna, isolating a radio frequency signal transmitted by the cable and coupling the radio frequency signal to the first signal amplifying circuit through the first capacitor;
the power supply conversion module is used for respectively providing power supply to the signal amplifying circuits of the V2X main antenna and the V2X auxiliary antenna;
The second capacitor is used for filtering the input power supply.
In some embodiments, the signal control circuit is further configured to
The V2X auxiliary antenna and the V2X auxiliary antenna adopt the same coaxial cable and are coupled to a V2X radio frequency receiving signal for control signal transmission;
The control signal is separated in the channel of the V2X auxiliary antenna and then sent to the change-over switch of the first signal amplifying circuit.
In some embodiments, the power supply circuit is further configured to
The V2X main antenna and the V2X main antenna adopt the same coaxial cable and are coupled to a V2X radio frequency receiving signal to be used as a power supply of the first signal amplifying circuit;
the power supply is separated from the channel of the V2X main antenna, and is used for supplying power to the change-over switch and the amplifying circuit in the first signal amplifying circuit respectively.
In some embodiments, the power supply circuit is coupled to the same coaxial cable as the V2X primary antenna coaxial cable, and the signal control circuit is coupled to the same coaxial cable as the V2X secondary antenna coaxial cable.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (6)
1. An antenna circuit, wherein the antenna circuit comprises a V2X passive antenna, a first signal amplifying circuit, a power supply circuit and a signal control circuit, the V2X passive antenna comprises a V2X main antenna and a V2X auxiliary antenna,
The two ends of the first signal amplifying circuit are respectively connected with the V2X main antenna and the V2X main antenna coaxial cable and are used for receiving or transmitting radio frequency signals;
The power supply circuit is coupled to the V2X main antenna coaxial cable and used for transmitting a power supply;
The signal control circuit is coupled to the V2X auxiliary antenna coaxial cable and used for transmitting control signals;
the V2X main antenna coaxial cable is connected with the V2X main antenna and coupled with the power supply circuit for supplying power to the first signal amplifying circuit,
The V2X auxiliary antenna coaxial cable is connected with the V2X auxiliary antenna and coupled with the signal control circuit, and is used for transmitting a control signal to the first signal amplification circuit;
The first signal amplifying circuit further includes: the V2X main antenna comprises a first transceiver circuit change-over switch and a second transceiver circuit change-over switch, wherein signals received in the V2X main antenna are isolated into two paths for signal amplification through the first transceiver circuit change-over switch and the second transceiver circuit change-over switch, and the two paths of signals are combined at an antenna transmitting end;
the signals sent out by the V2X main antenna are isolated into two paths through the first transceiving circuit change-over switch and the second transceiving circuit change-over switch, the signals are amplified respectively, and the two paths of signals are combined at an antenna transmitting end;
The signal control circuit is also used for adopting the same coaxial cable with the V2X auxiliary antenna and is coupled to the V2X radio frequency receiving signal for control signal transmission; the control signal is separated through a channel of the V2X auxiliary antenna and then sent to a change-over switch of the first signal amplifying circuit;
the power supply circuit is also used for adopting the same coaxial cable with the V2X main antenna and is coupled to a V2X radio frequency receiving signal to be used as a power supply of the first signal amplifying circuit;
the power supply is separated from the channel of the V2X main antenna, and is used for supplying power to the change-over switch and the amplifying circuit in the first signal amplifying circuit respectively.
2. The antenna circuit of claim 1, wherein the first signal amplifying circuit comprises a transmit amplifying circuit and a receive amplifying circuit,
Transmitting signals of the V2X host to the V2X main antenna for transmission through the transmission amplifying circuit;
And transmitting the signal received by the V2X main antenna to a V2X host through the receiving and amplifying circuit.
3. The antenna circuit of claim 1, further comprising: a second signal amplifying circuit is provided with a second signal amplifying circuit,
And two ends of the second signal amplifying circuit are respectively connected with the V2X auxiliary antenna and the V2X auxiliary antenna coaxial cable for receiving radio frequency signals.
4. The antenna circuit of claim 1, wherein the power supply circuit comprises a first capacitor, a second capacitor, and a power conversion module,
The first capacitor is used for isolating a direct current power supply transmitted by a cable and outputting the direct current power supply to a power input end of an antenna, isolating a radio frequency signal transmitted by the cable and coupling the radio frequency signal to the first signal amplifying circuit through the first capacitor;
the power supply conversion module is used for respectively providing power supply to the signal amplifying circuits of the V2X main antenna and the V2X auxiliary antenna;
The second capacitor is used for filtering the input power supply.
5. The antenna circuit of claim 1, wherein the power supply circuit is coupled to the same coaxial cable as the V2X primary antenna coaxial cable, and the signal control circuit is coupled to the same coaxial cable as the V2X secondary antenna coaxial cable.
6. An OBU device comprising the antenna circuit according to any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410102547.6A CN117639834B (en) | 2024-01-25 | 2024-01-25 | Antenna circuit and OBU equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410102547.6A CN117639834B (en) | 2024-01-25 | 2024-01-25 | Antenna circuit and OBU equipment |
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| CN117639834A CN117639834A (en) | 2024-03-01 |
| CN117639834B true CN117639834B (en) | 2024-05-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190141316A (en) * | 2018-06-14 | 2019-12-24 | 엘지이노텍 주식회사 | Multipurpose Wireless Charger |
| CN215452930U (en) * | 2021-08-27 | 2022-01-07 | 星觅(上海)科技有限公司 | V2X equipment and vehicle |
| CN113992234A (en) * | 2021-12-27 | 2022-01-28 | 智道网联科技(北京)有限公司 | Circuit for vehicle V2X device, vehicle V2X device and vehicle |
| CN216721328U (en) * | 2022-02-25 | 2022-06-10 | 智道网联科技(北京)有限公司 | Circuit for vehicle V2X device, V2X device and vehicle |
| CN114639948A (en) * | 2022-03-21 | 2022-06-17 | 智道网联科技(北京)有限公司 | Antenna for V2X device, V2X device and vehicle |
-
2024
- 2024-01-25 CN CN202410102547.6A patent/CN117639834B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190141316A (en) * | 2018-06-14 | 2019-12-24 | 엘지이노텍 주식회사 | Multipurpose Wireless Charger |
| CN215452930U (en) * | 2021-08-27 | 2022-01-07 | 星觅(上海)科技有限公司 | V2X equipment and vehicle |
| CN113992234A (en) * | 2021-12-27 | 2022-01-28 | 智道网联科技(北京)有限公司 | Circuit for vehicle V2X device, vehicle V2X device and vehicle |
| CN216721328U (en) * | 2022-02-25 | 2022-06-10 | 智道网联科技(北京)有限公司 | Circuit for vehicle V2X device, V2X device and vehicle |
| CN114639948A (en) * | 2022-03-21 | 2022-06-17 | 智道网联科技(北京)有限公司 | Antenna for V2X device, V2X device and vehicle |
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| Publication number | Publication date |
|---|---|
| CN117639834A (en) | 2024-03-01 |
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