CN216055149U - Circuit and device for realizing sharing of vehicle-mounted antenna and automobile - Google Patents

Abstract

A circuit, apparatus and vehicle for enabling sharing of an on-board antenna, the circuit comprising a plurality of radio frequency connectors and a power divider, wherein: a first radio frequency connector in the plurality of radio frequency connectors is connected with an antenna and a power divider of the automobile and is used for receiving a first antenna signal from the antenna and outputting the first antenna signal to the power divider; the power divider is connected with a second radio frequency connector and a third radio frequency connector in the plurality of radio frequency connectors and is used for dividing the first antenna signal into at least two paths of signals to obtain a second antenna signal and a third antenna signal which are respectively output to the second radio frequency connector and the third radio frequency connector; the second radio frequency connector is connected with a multimedia central control system of the automobile and used for outputting a second antenna signal to the multimedia central control system; the third radio frequency connector is connected with a rear seat entertainment system of the automobile and used for outputting a third antenna signal to the rear seat entertainment system. The vehicle-mounted antenna can be shared, the overall cost is reduced, and the space of the whole vehicle is optimized.

Description

Circuit and device for realizing sharing of vehicle-mounted antenna and automobile

Technical Field

The application relates to the technical field of vehicle-mounted antennas, in particular to a circuit, a device and an automobile for realizing sharing of the vehicle-mounted antennas.

Background

With the development of new energy vehicles, in order to meet various user requirements, nowadays, the vehicles become more and more intelligent and humanized. On some high-end vehicle models or commercial vehicles, a vehicle-mounted rear seat entertainment System is designed on a seat or a back armrest, and the System can be used for independently integrating various wireless communication technologies, such as Wi-Fi, Bluetooth, a Global Navigation Satellite System (GNSS), 4G and even the latest 5GNR technology.

Besides being integrated into a multimedia center control system, GNSS navigation systems are often used in a rear seat entertainment system. In order to better receive GNSS satellite signals, each rear seat entertainment system is generally designed with a GNSS external antenna. The technical scheme undoubtedly increases the cost, improves the arrangement difficulty and the cost of the whole vehicle, and prolongs the assembly time of the whole vehicle, because more antennas and more connecting wire harnesses are used.

In order to improve the problems, a GNSS antenna is integrated on the back of a display screen of a backseat entertainment system, but by adopting the technical scheme, the GNSS signal is weakened due to the fact that the antenna is shielded by metal of a vehicle body, and the navigation positioning performance is influenced.

SUMMERY OF THE UTILITY MODEL

The present application is proposed to solve the above problems. According to an aspect of the application, there is provided a circuit for enabling vehicle antenna sharing, the circuit comprising a plurality of radio frequency connectors and a power divider, wherein: a first radio frequency connector of the plurality of radio frequency connectors is connected with an antenna of an automobile and the power divider, and is used for receiving a first antenna signal from the antenna and outputting the first antenna signal to the power divider; the power divider is connected with a second radio frequency connector and a third radio frequency connector in the plurality of radio frequency connectors and is used for dividing the first antenna signal into at least two paths of signals to obtain a second antenna signal and a third antenna signal which are respectively output to the second radio frequency connector and the third radio frequency connector; the second radio frequency connector is connected with a multimedia central control system of the automobile and used for outputting the second antenna signal to the multimedia central control system; the third radio frequency connector is connected with a rear seat entertainment system of the automobile and used for outputting the third antenna signal to the rear seat entertainment system.

In one embodiment of the present application, the circuit further comprises a first inductor and a second inductor, the second radio frequency connector connecting the first radio frequency connector via the first inductor and the second inductor.

In one embodiment of the present application, the circuit further comprises a first capacitor connected between the first radio frequency connector and the power divider and a second capacitor connected between the second radio frequency connector and the power divider.

In one embodiment of the present application, the circuit further comprises a first resistor connected between the first inductor and the second inductor.

In one embodiment of the present application, the circuit further includes a third capacitor, one end of the third capacitor is connected to the first inductor and the first resistor, and the other end of the third capacitor is grounded.

In one embodiment of the present application, the first inductor and the second inductor are patch inductors.

In one embodiment of the present application, the first capacitor and the second capacitor are patch capacitors.

In one embodiment of the present application, the third capacitor is a chip capacitor, and the first resistor is a chip resistor.

In one embodiment of the present application, the antenna is a global navigation satellite system antenna.

In one embodiment of the present application, the plurality of radio frequency connectors are radio frequency coaxial circular connectors.

According to another aspect of the present application, there is provided an apparatus for realizing antenna sharing in a vehicle, the apparatus including a housing, a printed circuit board, and a fixing member, wherein the fixing member is configured to fix the printed circuit board to the housing, and the printed circuit board is loaded with the above-mentioned circuit for realizing antenna sharing in a vehicle.

According to another aspect of the application, an automobile is provided, which comprises an antenna, a multimedia central control system, a rear seat entertainment system and the device for realizing the sharing of the vehicle-mounted antenna, wherein the multimedia central control system and the rear seat entertainment system acquire an antenna signal from the antenna through the device for realizing the sharing of the vehicle-mounted antenna.

According to the circuit, the device and the automobile for realizing sharing of the vehicle-mounted antenna, only one antenna needs to be configured, so that both the multimedia center control system and the rear seat entertainment system can obtain antenna signals, sharing of the vehicle-mounted antenna is realized, overall cost is reduced, the space of the whole automobile is optimized, the performance of the rear seat entertainment system is optimized, and user experience is improved.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments 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 principles of the application. In the drawings, like reference numbers generally represent like parts or steps.

Fig. 1 shows a schematic diagram of a conventional automobile using a vehicle-mounted antenna.

Fig. 2 shows a schematic block diagram of a circuit for realizing vehicle-mounted antenna sharing according to an embodiment of the present application.

Fig. 3 shows a schematic block diagram of an apparatus for implementing vehicle-mounted antenna sharing according to an embodiment of the present application.

FIG. 4 shows a schematic view of an automobile 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, exemplary embodiments according to the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the application described in the application without inventive step, shall fall within the scope of protection of the application.

First, a schematic diagram of using a vehicle-mounted antenna in an existing automobile is described with reference to fig. 1. As shown in fig. 1, the existing car multimedia central control system and the rear seat entertainment system need to be collocated with GNSS antennas, and the number of GNSS antennas needed depends on the number of rear seat entertainment systems. In fig. 1, for example, two rear seat entertainment systems are included, and three GNSS antennas are required, such as GNSS antenna 1, GNSS antenna 2, and GNSS antenna 3 shown in fig. 1. The GNSS antenna 1 and the GNSS antenna 2 serve as GNSS antennas of two rear seat entertainment systems, and the GNSS antenna 3 serves as a GNSS antenna of a multimedia center control system. The scheme has the advantages of higher cost, high difficulty in arranging the whole vehicle and long time for assembling the whole vehicle. Due to such problems, the rear seat entertainment system may give up GNSS functions.

Based on this, the present application provides a solution to the above-mentioned problems, which is described below in connection with fig. 2 to 4.

Fig. 2 shows a schematic block diagram of a circuit 200 for implementing vehicle antenna sharing according to an embodiment of the present application. As shown in fig. 2, the circuit 200 for implementing antenna sharing in a vehicle includes a plurality of rf connectors, which are a first rf connector 210, a second rf connector 220, and a third rf connector 230, and further includes a power divider 240. Wherein the first rf connector 210 is connected to an antenna (not shown) of the car and the power divider 240, for receiving the first antenna signal from the antenna and outputting the first antenna signal to the power divider 240. The power divider 240 is connected to the second rf connector 220 and the third rf connector 230, and configured to divide the first antenna signal into at least two paths of signals, and output the second antenna signal and the third antenna signal to the second rf connector 220 and the third rf connector 230, respectively. The second rf connector 220 is connected to a multimedia central control system (not shown) of the vehicle, and is used for outputting the second antenna signal to the multimedia central control system. The third rf connector 230 is connected to a rear seat entertainment system (not shown) of the car for outputting a third antenna signal to the rear seat entertainment system.

In an embodiment of the present application, a circuit structure is provided to implement a multimedia center control system and a rear seat entertainment system to share one antenna (such as a GNSS antenna), without configuring each of them with one antenna. Specifically, the power divider 240 divides the antenna signal input by the first rf connector 210 into at least two signals, and the at least two signals are respectively sent to the multimedia center control system and the rear seat entertainment system via the second rf connector 220 and the third rf connector 230, so that the multimedia center control system and the rear seat entertainment system can both obtain the antenna signal (such as GNSS signal), thereby realizing the sharing of the vehicle-mounted antenna. Compared with the scheme that a plurality of antennas need to be configured, the circuit structure provided by the application only needs to be configured, so that the overall cost is reduced, and the space of the whole vehicle is optimized. In addition, because one antenna is shared, the antenna does not need to be arranged on the back of a display screen of the rear seat entertainment system, but can be arranged outside (such as a shark fin antenna of an automobile), so that the received signal strength and the positioning performance of the antenna of the rear seat entertainment system can be greatly improved. Besides, the current multimedia center control system has a GNSS positioning navigation function, due to shielding of an automobile body, antenna design of a rear seat entertainment system is difficult, and meanwhile, cost is increased, so that a lot of automobile factories give up design of the function.

In the embodiment of the present application, to distinguish from each other, the antenna signal input by the first rf connector 210 is referred to as a first antenna signal, and the at least two signals output by the power divider 240 are referred to as a second antenna signal and a third antenna signal. Here, the number of signal paths into which the power divider 240 needs to divide the first antenna signal depends on the number of rear seat entertainment systems. For example, if the car includes a rear seat entertainment system, the number of the third rf connectors 230 is one, and the second rf connector 220 connected to the multimedia center control system is added, so that the two signals, i.e., the second signal and the third signal, need to be divided into two paths. For another example, if the car includes two rear seat entertainment systems, the number of the third rf connectors 230 is two, and the second rf connector 220 connected to the multimedia center control system is added, so that the total number of the three signals needs to be divided into three signals, in this example, the power divider 240 outputs three signals, i.e., the second signal and the two third signals.

Therefore, the circuit 200 for implementing the vehicle antenna sharing includes at least three rf connectors, and the first rf connector 210, the second rf connector 220, and the third rf connector 230 are named according to their different functions (the first rf connector 210 is used for connecting the antenna to receive the first antenna signal, the second rf connector 220 is used for connecting the multimedia central control system to transmit the second antenna signal to the multimedia central control system, and the third rf connector 230 is used for connecting the rear seat entertainment system to transmit the third antenna signal to the rear seat entertainment system), and their names do not limit their number. Typically, the number of first rf connectors 210 is one, the number of second rf connectors 220 is one, and the number of third rf connectors 230 is equal to the number of rear seat entertainment systems (typically one or two).

Similarly, the first antenna signal, the second antenna signal, and the third antenna signal are named because of their origin or destination (the first antenna signal comes from the antenna, the second antenna signal goes to the multimedia center control system, and the third antenna signal goes to the rear seat entertainment system), and their names do not limit their number. Generally, the first antenna signal is a single signal, the second antenna signal is a single signal, and the number of the third antenna signals is equal to the number of the rear seat entertainment systems (generally, one or two signals). The power divider 240 may select a power divider with a specification of one to two, one to three, one to four, etc. according to the number of the rear seat entertainment systems.

In an embodiment of the present application, the plurality of rf connectors in the circuit 200 may be rf coaxial circular connectors (referred to as FAKRA connectors). The second rf connector 220 may be a universal interface connector for an automobile, and is connected to the multimedia center control system through a coaxial cable harness of the automobile, so as to input a second antenna signal, such as a GNSS signal, to the multimedia center control system for positioning. Meanwhile, the multimedia center control system can realize power supply input for the antenna through the second radio frequency connector 220, and the power supply voltage range is generally 2V-5V. And accessing the rear seat entertainment system through the third radio frequency connector, and providing a third antenna signal, such as a GNSS signal, for the rear seat entertainment system to realize a positioning function. The first radio frequency connector 210 is connected to a car antenna, such as a GNSS antenna, to receive GNSS signals while the car antenna is powered through the connection. In an embodiment of the present application, the rf connectors may be male connectors or direct connectors.

In the embodiment of the present application, the power divider 240 may select a passive power divider or an active power divider according to performance requirements. Wherein the active power divider uses the power input from the second rf connector 220. The operating band of the power splitter 240 covers the frequency range of the antenna signal. For example, when the antenna is a GNSS antenna, the power divider 240 of the circuit 200 needs to cover frequencies of 1559MHz to 1610MHz, 1176.45MHz ± 1.023 MHz.

In an embodiment of the present application, the circuit 200 may further include a first inductor and a second inductor (not shown), and the second rf connector 220 is connected to the first rf connector 210 via the first inductor and the second inductor. The first inductor and the second inductor may form a power supply circuit of the antenna, and the first inductor and the second inductor may prevent the first antenna signal input by the first rf connector 210 and the second antenna signal input by the second rf connector 220 from entering the power supply circuit. In addition, when the first inductor and the second inductor are placed on the printed circuit board, the first inductor and the second inductor can be directly placed on an antenna signal wiring line, and the antenna signal can not be shunted. In embodiments of the present application, the first inductor and the second inductor may be patch inductors. In one example, the first inductor and the second inductor may be selected from 0402 size and 0603 size inductors, respectively.

In an embodiment of the present application, the circuit 200 may further include a first capacitor and a second capacitor (not shown), wherein the first capacitor is connected between the first rf connector 210 and the power divider 240, and the second capacitor is connected between the second rf connector 220 and the power divider 240. The primary function of the first and second capacitors is to prevent damage to the power divider 240 caused by dc power to the antenna entering the power divider 240, but to allow the antenna signal to pass through without affecting the quality of the antenna signal. In embodiments of the present application, the first capacitor and the second capacitor may be patch capacitors. In one example, the first capacitor and the second capacitor may be 0201 size, 0402 size, or 0603 size capacitors.

In an embodiment of the present application, the circuit 200 may further include a first resistor (not shown) connected between the aforementioned first inductor and the second inductor, constituting a power supply circuit of the antenna. The first resistor is mainly used for realizing a voltage division function when the antenna is short-circuited, and plays a role in protection. In an embodiment of the present application, the first resistor may be a chip resistor. In one example, the first resistor may be a 0201 size, 0402 size, or 0603 size resistor.

In an embodiment of the present application, the circuit 200 may further include a third capacitor (not shown), one end of the third capacitor is connected to the first inductor and the first resistor, and the other end is grounded for serving as a power supply bypass capacitor. The first inductor, the second inductor, the first resistor and the third capacitor may constitute a supply circuit of the antenna. The third capacitor is mainly used for filtering power supply noise and reducing interference on the antenna. In an embodiment of the present application, the third capacitor may be a patch capacitor. In one example, the third capacitor may be a 0201 size, 0402 size, or 0603 size capacitor.

Based on the above description, the circuit 200 for implementing vehicle-mounted antenna sharing according to the embodiment of the present application can enable both the multimedia center control system and the rear seat entertainment system to obtain an antenna signal by only configuring one antenna, implement sharing of the vehicle-mounted antenna, reduce the overall cost, optimize the vehicle space, optimize the performance of the rear seat entertainment system, and improve the user experience.

According to another aspect of the present application, there is also provided an apparatus for implementing antenna sharing for a vehicle, which may include a housing, a printed circuit board, and a fixing component, wherein the fixing component is used for fixing the printed circuit board on the housing, and the printed circuit board is loaded with the circuit 200 for implementing antenna sharing for a vehicle as described above. Described below in conjunction with fig. 3.

Fig. 3 shows a schematic block diagram of an apparatus 300 for implementing vehicle-mounted antenna sharing according to an embodiment of the present application. As shown in fig. 3, the apparatus 300 includes a housing 1, a printed circuit board 2, a power divider 3, a fixing member 14, and a plurality of radio frequency connectors 4, 5, 6, and 7. Therein, the radio frequency connector 4 is labeled F1, the radio frequency connector 5 is labeled F2, the radio frequency connector 6 is labeled F3, and the radio frequency connector 7 is labeled F4.

In the device 300, the housing 1 is intended to be mounted to a vehicle and to protect the printed circuit board 2. The housing 1 may be a metal or plastic housing, and the size may be adjusted according to actual items. When a patch device is used in the circuit, the housing 1 can be made very small in size. The printed circuit board 2 realizes device mounting and signal communication. The size and shape of the printed circuit board 2 can be designed into different sizes according to actual project requirements.

The radio frequency connectors F1, F2, F3, and F4 are radio frequency coaxial circular connectors. The F1 is a universal interface connector for automobiles, is connected to the multimedia central control system through an automobile coaxial wire harness, and inputs GNSS signals to the multimedia central control system for positioning. Meanwhile, the multimedia central control system supplies power to the GNSS antenna through the radio frequency connector F1, and the power supply voltage range is generally 2V-5V. The radio frequency connectors F2 and F3 are connected with a backseat entertainment system through radio frequency coaxial lines respectively, GNSS signals are provided for the backseat entertainment system, and the positioning function is achieved. The radio frequency connector F4 is coaxially connected to an automobile GNSS antenna to receive GNSS signals; at the same time, the vehicle GNSS antenna is powered through this connection.

The power divider 3, which may be designated as P1, divides the incoming GNSS signals from the rf connector F4 into multiple outputs and connects the rf connector F1 to the multimedia center control system via a coaxial harness to input GNSS signals to the multimedia center control system. Rf connectors F2 and F3 are connected to different rear seat entertainment systems, respectively. According to the requirement of the whole vehicle, the power divider 3 can select the power dividers with the specifications of one to two, one to three, one to four and the like. Passive and active power dividers may be selected for performance requirements, with the active power divider powering the power input using rf connector F1, as indicated by the P1 power arrows in fig. 3. The device working frequency band of the power divider 3 covers frequencies of 1559MHz-1610MHz and 1176.45MHz +/-1.023 MHz, which is the GNSS signal working frequency range.

In addition, device 300 includes patch capacitors 8 and 9, which may have a capacitance of 33pF, a withstand voltage of 50V, and a precision of +/-2%. The patch capacitors 8 and 9 are labeled C1 and C2, respectively, and mainly function to prevent damage to the power divider 3 caused by dc power supplied to the GNSS antenna entering the power divider 3, but allow GNSS signals to pass through without affecting GNSS signal quality. The patch capacitors 8 and 9 may be 0201 size, 0402 size or 0603 size capacitors.

In addition, device 300 also includes patch inductors 10 and 11, which may have an inductance value of 56nH and a precision of +/-1%, labeled L1, L2, respectively. The main function of the chip inductors 10 and 11 is to prevent GNSS signals input by the radio frequency connectors F4, F1 from entering the power supply circuit; meanwhile, when the inductor is placed on the printed circuit board 2, the inductor is directly placed on a GNSS signal wiring line, and the GNSS signal cannot be shunted. The chip inductors 10 and 11 may be selected with 0402 size and 0603 size inductors.

In addition, the device 300 further includes a patch capacitor 12, the capacitance value may be 12pF, the withstand voltage may be 50V, the accuracy may be +/-2%, and the reference is C3, which is used as a power supply bypass capacitor to filter power supply noise and reduce interference to the GNSS antenna; the patch capacitor 12 can be a 0201 size, 0402 size or 0603 size capacitor.

In addition, the device 300 further includes a chip resistor 13, which may have a resistance value of 22 ohms and an accuracy of +/-1%, and is labeled as R1, and when the external GNSS antenna is short-circuited, the function of voltage division is implemented to perform a protection function. The chip resistor 13 may be a 0201-sized, 0402-sized, or 0603-sized resistor.

In fig. 3, L2, R1, C3, and L1 constitute a GNSS antenna (not shown) and a power supply circuit of the power divider 3.

According to the device 300 for realizing the sharing of the vehicle-mounted antenna, the antenna signal can be obtained by the multimedia center control system and the backseat entertainment system only by configuring one antenna, the sharing of the vehicle-mounted antenna is realized, the overall cost is reduced, the whole vehicle space is optimized, the performance of the backseat entertainment system is optimized, and the user experience is improved.

According to still another aspect of the present application, there is provided an automobile comprising an antenna, a multimedia center control system, a rear seat entertainment system and the aforementioned apparatus 300 for implementing antenna sharing, wherein the multimedia center control system and the rear seat entertainment system obtain an antenna signal from the antenna via the apparatus 300 for implementing antenna sharing. Described below in conjunction with fig. 4.

Fig. 4 shows a schematic view of an automobile 400 according to an embodiment of the application. As shown in fig. 4, the automobile 400 includes a GNSS antenna, a multimedia central control system, two rear seat entertainment systems, and a device 300 for implementing the sharing of the vehicle-mounted antenna, wherein the GNSS antenna, the multimedia central control system, the rear seat entertainment systems, and the device 300 for implementing the sharing of the vehicle-mounted antenna may be connected by using a coaxial wire harness. Firstly, a GNSS signal is received through a GNSS antenna, and after entering the device 300, the device 300 distributes the GNSS signal to a backseat entertainment system and a multimedia center control system to realize a positioning function; the GNSS antenna can operate only when power is required, which is supplied from the multimedia center control system, into the device 300 through the rf connector F1 of the device 300 via a coaxial harness, and out of the rf connector F4 of the device 300 via the coaxial harness to supply power to the GNSS antenna.

Based on the above description, according to the automobile 400 of the embodiment of the application, only one antenna needs to be configured, so that both the multimedia center control system and the rear seat entertainment system can obtain the antenna signal, the sharing of the vehicle-mounted antenna is realized, the overall cost is reduced, the whole automobile space is optimized, the performance of the rear seat entertainment system is optimized, and the user experience is improved.

Although the example embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above-described example embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another device, or some features may be omitted, or not executed.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the description of exemplary embodiments of the present application, various features of the present application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the application and aiding in the understanding of one or more of the various inventive aspects. However, the method of the present application should not be construed to reflect the intent: this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.

It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The various component embodiments of the present application may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some of the modules according to embodiments of the present application. The present application may also be embodied as apparatus programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present application may be stored on a computer readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

The above description is only for the specific embodiments of the present application or the description thereof, and the protection scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope disclosed in the present application, and shall be covered by the protection scope of the present application. The protection scope of the present application shall be subject to the protection scope of the claims.

Claims (12)

1. A circuit for implementing antenna sharing in a vehicle, the circuit comprising a power splitter and a plurality of radio frequency connectors, wherein:

a first radio frequency connector of the plurality of radio frequency connectors is connected with an antenna of an automobile and the power divider, and is used for receiving a first antenna signal from the antenna and outputting the first antenna signal to the power divider;

the power divider is connected with a second radio frequency connector and a third radio frequency connector in the plurality of radio frequency connectors and is used for dividing the first antenna signal into at least two paths of signals to obtain a second antenna signal and a third antenna signal which are respectively output to the second radio frequency connector and the third radio frequency connector;

the second radio frequency connector is connected with a multimedia central control system of the automobile and used for outputting the second antenna signal to the multimedia central control system;

the third radio frequency connector is connected with a rear seat entertainment system of the automobile and used for outputting the third antenna signal to the rear seat entertainment system.

2. The circuit of claim 1, further comprising a first inductor and a second inductor, the second radio frequency connector connecting the first radio frequency connector via the first inductor and the second inductor.

3. The circuit of claim 1, further comprising a first capacitor and a second capacitor, the first capacitor being connected between the first radio frequency connector and the power divider, the second capacitor being connected between the second radio frequency connector and the power divider.

4. The circuit of claim 2, further comprising a first resistor connected between the first inductor and the second inductor.

5. The circuit of claim 4, further comprising a third capacitor, one end of the third capacitor being connected to the first inductor and the first resistor, the other end of the third capacitor being connected to ground.

6. The circuit of claim 2, wherein the first inductor and the second inductor are patch inductors.

7. The circuit of claim 3, wherein the first capacitor and the second capacitor are patch capacitors.

8. The circuit of claim 5, wherein the third capacitor is a chip capacitor and the first resistor is a chip resistor.

9. The circuit of any of claims 1-8, wherein the antenna is a global navigation satellite system antenna.

10. The circuit of any of claims 1-8, wherein the plurality of radio frequency connectors are radio frequency coaxial circular connectors.

11. An apparatus for implementing antenna sharing for a vehicle, comprising a housing, a printed circuit board, and a fixing member, wherein the fixing member is used for fixing the printed circuit board to the housing, and the printed circuit board carries thereon the circuit for implementing antenna sharing for a vehicle according to any one of claims 1 to 10.

12. An automobile, characterized in that the automobile comprises an antenna, a multimedia center control system, a rear seat entertainment system and the device for realizing the sharing of the vehicle-mounted antenna of claim 11, wherein the multimedia center control system and the rear seat entertainment system acquire an antenna signal from the antenna via the device for realizing the sharing of the vehicle-mounted antenna.

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