An antenna system and method for implementing e-call and bluetooth functions based on a single antenna

Abstract

The application relates to an antenna system and method for realizing E-Call and Bluetooth functions based on a single antenna, which comprises an E-Call module, a Bluetooth module, an antenna unit, an antenna switching switch module and a control module. The antenna switching switch module at least comprises a first input end, a second input end, an output end and an enable end. The output end of the antenna switching switch module is connected with the antenna unit, the enable end of the antenna switching switch module is connected with the control module, the first input end of the antenna switching switch module is connected with the E-Call module, and the second input end is connected with the Bluetooth module. The control module is used for detecting a collision state signal and sending an enable signal to the antenna switching switch module according to a detection result. The output end of the antenna switching switch module selects the first input end or the second input end according to the enable signal. The application realizes two functions of E-Call emergency call and Bluetooth through one antenna unit, and solves the problems of large space occupation of traditional multiple antennas, large volume of a T-Box and high cost.

Description

Technical Field

[0001] This invention relates to the field of vehicle antenna technology, and in particular to an antenna system and method for realizing E-Call and Bluetooth functions based on a single antenna. Background Technology

[0002] With the increasing number of cars, people are paying more and more attention to car safety, as safety is paramount. Most countries worldwide have policies mandating that cars be equipped with emergency call systems. These systems automatically trigger alarms in the event of a traffic accident, allowing emergency medical services (120) to respond immediately and save lives. E-Call emergency services require E-Call antennas; currently, most automakers include basic features like Bluetooth and Wi-Fi in their vehicles, necessitating Bluetooth and Wi-Fi antennas. This results in multiple antennas being integrated into the T-Box. Multiple antennas occupy a lot of space, hindering product integration and leading to an excessively large T-Box size. This contradicts current automakers' miniaturization requirements, resulting in design redundancy and increased manufacturing costs due to separate antenna designs.

[0003] If multiple antennas are placed together, and if they share the same operating frequency band (e.g., E-Call antennas and Bluetooth antennas share the same operating frequency band), the isolation between the antennas will be poor, resulting in poor signal transmission quality and other problems. Summary of the Invention

[0004] To overcome the problems of existing T-Box technologies that require the integration of multiple antennas, which occupy a large space and are not conducive to product integration, resulting in an excessively large T-Box size that does not meet the current miniaturization requirements of car manufacturers, has significant design redundancy, and increases board manufacturing costs due to separate antenna designs, and also addresses the issues of poor isolation between antennas and poor signal transmission quality when multiple antennas share the same operating frequency band, this invention provides an antenna system and method for implementing E-Call and Bluetooth functions based on a single antenna.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] An antenna system that implements E-Call and Bluetooth functions based on a single antenna includes an E-Call module, a Bluetooth module, an antenna unit, an antenna switching module, and a control module. The antenna switching module includes at least a first input terminal, a second input terminal, an output terminal, and an enable terminal. The output terminal of the antenna switching module is connected to the antenna unit, and the enable terminal of the antenna switching module is connected to the control module. The first input terminal of the antenna switching module is connected to the E-Call module, and the second input terminal of the antenna switching module is connected to the Bluetooth module. The control module is used to detect collision state signals and send an enable signal to the antenna switching module according to the detection results. The antenna switching module selects to turn on the first input terminal or the second input terminal according to the enable signal.

[0007] Furthermore, as a preferred technical solution, it also includes a signal preprocessing module. The input terminal of the signal preprocessing module is used to receive the collision state signal, and the output terminal of the signal preprocessing module is connected to the control module. The signal preprocessing module is used to perform voltage reduction processing on the received collision state signal and output a low-voltage PWM signal to the control module so that the control module can detect the low-voltage PWM signal.

[0008] Furthermore, as a preferred technical solution, the antenna switching module selects to turn on the first input terminal or the second input terminal based on the enable signal, specifically including:

[0009] The enable signal is a high-level signal or a low-level signal;

[0010] When the enable signal received by the antenna switching module is a high-level signal, the switching output terminal turns on the first input terminal;

[0011] When the enable signal received by the antenna switching module is a low-level signal, the switching output terminal turns on the second input terminal.

[0012] Furthermore, as a preferred technical solution, the signal preprocessing module includes a first MOS transistor and a second MOS transistor. The gate (G) of the first MOS transistor is used to receive a collision state signal. The drain (D) of the first MOS transistor is connected to a first pull-up power supply. The source (S) of the first MOS transistor is grounded. The substrate of the first MOS transistor is connected to the gate (G) of the second MOS transistor. The drain (D) of the second MOS transistor is connected to a second pull-up power supply. The source (S) of the second MOS transistor is grounded. The substrate of the second MOS transistor is connected to the control module.

[0013] Furthermore, as a preferred technical solution, a filtering circuit is also included. The input terminal of the filtering circuit receives the collision state signal and filters the collision state signal. The output terminal of the filtering circuit is connected to the gate (G) of the first MOS transistor.

[0014] Furthermore, as a preferred technical solution, the filter circuit includes a first resistor and a capacitor, which are connected in series.

[0015] Furthermore, as a preferred technical solution, the drain (D) of the first MOSFET is connected to a first pull-up power supply via a second resistor, the substrate of the first MOSFET is connected to the gate (G) of the second MOSFET via a third resistor, and the drain of the second MOSFET is connected to a second pull-up power supply via a third resistor.

[0016] Furthermore, as a preferred technical solution, the operating frequency of the E-Call module covers the operating frequency of the Bluetooth module.

[0017] A method for implementing E-Call and Bluetooth functions based on a single antenna, wherein the antenna system described above for implementing E-Call and Bluetooth functions based on a single antenna realizes both E-Call and Bluetooth functions, the method includes the following steps:

[0018] The collision status signal is acquired, and the collision status signal is stepped down by the signal preprocessing module to output a low-voltage PWM signal.

[0019] The control module detects the received low-voltage PWM signal and sends an enable signal to the antenna switching module based on the detection result.

[0020] The antenna switching module switches between E-Call antenna mode and Bluetooth antenna mode according to the enable signal to enable emergency call function or Bluetooth function.

[0021] Furthermore, as a preferred technical solution, the collision state signal is a high-voltage PWM signal. If a collision occurs, the collision state signal has a first duty cycle; if no collision occurs, the collision state signal has a second duty cycle.

[0022] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0023] The antenna system of the present invention, which realizes E-Call and Bluetooth functions based on a single antenna, achieves both E-Call emergency call and Bluetooth functions through a single antenna unit by setting an antenna switching switch module. This solves the problem of large space occupation and high cost of traditional multiple antennas, which leads to large T-Box size and high cost, and is beneficial to the current requirements of car manufacturers for T-Box miniaturization.

[0024] Furthermore, the design of combining multiple antennas into one antenna saves on board manufacturing costs, facilitates large-scale production, and solves problems such as poor signal transmission quality caused by poor isolation between multiple antennas. Attached Figure Description

[0025] Figure 1 This is a block diagram of the antenna system of the present invention.

[0026] Figure 2 This is a circuit diagram of the signal preprocessing module of the antenna system of the present invention.

[0027] Figure 3 This is a schematic diagram of the signal input and output of the control module of the antenna system of the present invention.

[0028] Figure 4 This is a schematic diagram illustrating the state switching operation of the antenna switching module of the antenna system of the present invention for the E-Call module and the Bluetooth module.

[0029] Figure 5 This is a structural block diagram of the antenna system of the present invention.

[0030] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer definition of the scope of protection of the present invention.

[0032] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent.

[0033] Furthermore, if terms such as "first" or "second" are used for descriptive purposes only, they are mainly used to distinguish different devices, components or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, components or parts, and should not be construed as indicating or implying relative importance.

[0034] Example 1

[0035] This embodiment addresses the shortcomings of existing technologies where T-Boxes require the integration of multiple antennas. Multiple antennas occupy a large space, hindering product integration and resulting in excessively large T-Box sizes. This is detrimental to the miniaturization requirements of current automakers, leading to significant design redundancy. Furthermore, separate antenna designs increase board manufacturing costs, resulting in high overall costs. Placing multiple antennas together, especially if they share operating frequency bands, leads to poor isolation and signal transmission quality. Therefore, this embodiment discloses an antenna system that implements E-Call and Bluetooth functions based on a single antenna.

[0036] This embodiment discloses an antenna system that implements E-Call and Bluetooth functions based on a single antenna, such as... Figure 1 As shown, the system includes an E-Call module, a Bluetooth module, an antenna unit, an antenna switching module, a control module, and a signal preprocessing module. The antenna switching module includes at least a first input terminal, a second input terminal, an output terminal, and an enable terminal. The output terminal of the antenna switching module is connected to the antenna unit, and the enable terminal of the antenna switching module is connected to the control module. The first input terminal of the antenna switching module is connected to the E-Call module, and the second input terminal of the antenna switching module is connected to the Bluetooth module. The input terminal of the signal preprocessing module is used to receive collision status signals, and the output terminal of the signal preprocessing module is connected to the control module. The signal preprocessing module is used to step down the received collision status signals and output a low-voltage PWM signal to the control module, so that the control module can detect the low-voltage PWM signal and send an enable signal to the antenna switching module according to the detection result. The antenna switching module selects to turn on the first input terminal or the second input terminal according to the enable signal.

[0037] In this embodiment, the collision status signal is a high-voltage PWM signal. If a collision occurs, the collision status signal is the first duty cycle; if no collision occurs, the collision status signal is the second duty cycle.

[0038] Specifically, for example, the collision state signal can be defined as follows: voltage 12V, PWM wave period duration and duty cycle; no collision: period 30ms, of which low level 10ms and high level 20ms; collision: period 30ms, of which low level 20ms and high level 10ms, output frequency 33.33Hz, and duty cycle accuracy ±0.5ms.

[0039] In this embodiment, see Figure 2 The signal preprocessing module uses dual MOSFETs to step down the collision state signal, so that when the incoming collision state signal is high, the output is also high, and when the incoming collision state signal is low, the output is also low, achieving the same high and low voltage effect, and outputting a low-voltage PWM signal to the control module.

[0040] Additionally, in this embodiment, see Figure 3 The control module detects the received low-voltage PWM signal to determine whether it is a high-voltage or low-voltage level, and then outputs a corresponding enable signal to the antenna switching module. That is, after receiving the collision state signal (low-voltage PWM signal) after being stepped down by the signal preprocessing module, the control module outputs a high level (enable signal) to the antenna switching module (Switch IC). The antenna switching module (Switch IC) selects to turn on the first input terminal or the second input terminal according to the enable signal.

[0041] For details, see Figure 4 Since the enable signal can be either high or low, when the enable signal received by the antenna switching module (Switch IC) is high (i.e., when the antenna switching module (Switch IC) receives the Switch EN signal pulled high), the antenna switching module (Switch IC) switches to RF1 state. This means the output of the antenna switching module (Switch IC) is connected to the first input terminal, which in turn enables the E-Call module, achieving E-Call antenna mode. When the enable signal received by the antenna switching module (Switch IC) is low (i.e., when the antenna switching module (Switch IC) does not receive the Switch EN signal), the antenna switching module (Switch IC) switches to RF0 state. This means the output of the antenna switching module (Switch IC) is connected to the second input terminal, which in turn enables the Bluetooth module, achieving Bluetooth antenna mode.

[0042] In this embodiment, the control module uses an MCU that supports PWM waves, and the antenna switching module (Switch IC) can use an existing antenna switching IC that can realize logic selection. In this embodiment, the selected antenna switching IC is model SKYA21003. The principle of the antenna switching module (Switch IC) switching between RF1 state and RF0 state according to the enable signal, that is, the Switch EN signal, is shown in Table 1 below.

[0043] The antenna switching IC disclosed in Table 1 is existing technology, and its logic judgment process will not be elaborated in detail in this embodiment.

[0044] Switch EN 1V8 Mode 1 1 RF1 0 1 RF0

[0045] Table 1

[0046] In this embodiment, the structure of the antenna system is shown below. Figure 5 The implementation process is as follows: Under normal circumstances, i.e., ①General in the figure, the antenna unit is switched to the Bluetooth module through the antenna switching switch module to realize the Bluetooth function; in an emergency, i.e., ②Emergency in the figure, the antenna unit is switched to the E-Call module through the antenna switching switch module to realize the emergency call function.

[0047] In addition, as a preferred embodiment, it should be noted that the operating frequency of the E-Call module must cover the operating frequency of the Bluetooth module in order to achieve the design of the E-Call module and the Bluetooth module sharing a single antenna.

[0048] Specifically, the operating frequency points for 5G E-Call include: 824-960MHz, 1.710GHz-2.170GHz, 2.3GHz-2.69GHz, and 3.3GHz-5GHz; the operating frequency points for 4G E-Call include: 824-960MHz, 1.710GHz-2.170GHz, and 2.3GHz-2.69GHz; while Bluetooth operates at 2.45GHz. Therefore, whether it's 5G E-Call or 4G... E-Call covers the operating frequency of Bluetooth, easily meeting the design requirements of sharing a single antenna between the E-Call and Bluetooth modules. Furthermore, since emergency calls are a rarely used function, triggered only in emergencies such as car accidents or other serious collisions, sharing an antenna between the E-Call and Bluetooth modules does not affect the normal operation of Bluetooth. This solves the problem of traditional multiple antennas occupying a large space, resulting in a bulky T-Box, and is beneficial for meeting the current miniaturization requirements of automakers. Moreover, consolidating multiple antennas into a single antenna design saves on board manufacturing costs, facilitates mass production, and solves the problem of poor isolation between multiple antennas, which can lead to poor signal transmission quality.

[0049] Example 2

[0050] This embodiment discloses an antenna system that implements E-Call and Bluetooth functions based on a single antenna, and further elaborates on the signal preprocessing module based on Embodiment 1.

[0051] In this embodiment, see Figure 2 As shown, the signal preprocessing module includes a filtering circuit, a first MOSFET, and a second MOSFET. The input of the filtering circuit receives the collision state signal and filters it. The output of the filtering circuit is connected to the gate (G) of the first MOSFET. The drain (D) of the first MOSFET is connected to a first pull-up power supply. The source (S) of the first MOSFET is grounded. The substrate of the first MOSFET is connected to the gate (G) of the second MOSFET. The drain (D) of the second MOSFET is connected to a second pull-up power supply. The source (S) of the second MOSFET is grounded. The substrate of the second MOSFET is connected to the control module.

[0052] In a preferred embodiment, the filter circuit includes a first resistor and a capacitor connected in series; the drain of the first MOSFET is connected to a first pull-up power supply through a second resistor; the substrate of the first MOSFET is connected to the gate of the second MOSFET through a third resistor; and the drain of the second MOSFET is connected to a second pull-up power supply through a third resistor.

[0053] In this embodiment, the received collision state signal is stepped down by a signal preprocessing module, so that when the incoming collision state signal is high, the output is also high, and when the incoming collision state signal is low, the output is also low, achieving the same high and low voltage effect, and outputting a low-voltage PWM signal to the control module.

[0054] Example 3

[0055] This embodiment discloses a method for implementing E-Call and Bluetooth functions based on a single antenna. It uses the antenna system described in Embodiment 1 to implement both E-Call and Bluetooth functions based on a single antenna.

[0056] This embodiment discloses a method for implementing E-Call and Bluetooth functions based on a single antenna, including the following steps:

[0057] The collision status signal is acquired, and the collision status signal is stepped down by the signal preprocessing module to output a low-voltage PWM signal.

[0058] In this embodiment, the collision status signal is a high-voltage PWM signal. If a collision occurs, the collision status signal is the first duty cycle; if no collision occurs, the collision status signal is the second duty cycle.

[0059] The signal preprocessing module in this step performs voltage reduction processing on the collision state signal, as described in Example 2. This example will not repeat the description.

[0060] The control module detects the received low-voltage PWM signal and sends an enable signal to the antenna switching module based on the detection result.

[0061] For the specific implementation process of this step, please refer to Example 1. This example will not repeat the description.

[0062] The antenna switching module switches between E-Call antenna mode and Bluetooth antenna mode according to the enable signal to enable emergency call function or Bluetooth function.

[0063] For the specific implementation process of this embodiment, please refer to Embodiment 1. This embodiment will not repeat the description.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An antenna system for implementing E-Call and Bluetooth functions based on a single antenna, characterized by, The E-Call module, the Bluetooth module, the antenna unit, the antenna switching module, the control module and the signal preprocessing module are included, the antenna switching module includes at least a first input end, a second input end, an output end and an enable end, the output end of the antenna switching module is connected with the antenna unit, the enable end of the antenna switching module is connected with the control module, the first input end of the antenna switching module is connected with the E-Call module, the second input end of the antenna switching module is connected with the Bluetooth module, the input end of the signal preprocessing module is used for receiving a collision state signal, the output end of the signal preprocessing module is connected with the control module, the signal preprocessing module is used for performing step-down processing on the received collision state signal and outputting a low-voltage PWM signal to the control module, so that the control module detects the low-voltage PWM signal, and the control module is used for sending an enable signal to the antenna switching module according to the detection result, and the antenna switching module selects the first input end or the second input end to be turned on according to the enable signal. The working frequency point of the E-Call module covers the working frequency point of the Bluetooth module. The collision state signal is a high-voltage PWM signal, the collision state signal is a first duty cycle when a collision occurs, and the collision state signal is a second duty cycle when no collision occurs.

2. The antenna system for implementing E-Call and Bluetooth functions based on a single antenna according to claim 1, wherein, The antenna switching module selects the first input end or the second input end to be turned on according to the enable signal specifically includes: The enable signal is a high-level signal or a low-level signal. When the enable signal received by the antenna switching module is a high-level signal, the switching output end turns on the first input end. When the enable signal received by the antenna switching module is a low-level signal, the switching output end turns on the second input end.

3. The antenna system for implementing E-Call and Bluetooth functions based on a single antenna according to claim 1, wherein, The signal preprocessing module includes a first MOS tube and a second MOS tube, the G pole of the first MOS tube is used for receiving a collision state signal, the D pole of the first MOS tube is connected with a first pull-up power supply, the S pole of the first MOS tube is grounded, the substrate of the first MOS tube is connected with the G pole of the second MOS tube, the D pole of the second MOS tube is connected with a second pull-up power supply, the S pole of the second MOS tube is grounded, and the substrate of the second MOS tube is connected with the control module.

4. The antenna system for implementing E-Call and Bluetooth functions based on a single antenna according to claim 3, wherein, A filter circuit is further included, the input end of the filter circuit receives a collision state signal to perform filtering processing on the collision state signal, and the output end of the filter circuit is connected with the G pole of the first MOS tube.

5. The antenna system for implementing E-Call and Bluetooth functions based on a single antenna according to claim 4, wherein the first antenna element is connected to the second antenna element through the first transmission line and the second transmission line. The filter circuit includes a first resistor and a capacitor, and the first resistor and the capacitor are connected in series.

6. The antenna system for implementing E-Call and Bluetooth functions based on a single antenna according to claim 3, wherein, The D pole of the first MOS tube is connected with the first pull-up power supply through a second resistor, the substrate of the first MOS tube is connected with the G pole of the second MOS tube through a third resistor, and the D pole of the second MOS tube is connected with the second pull-up power supply through the third resistor.

7. A method for implementing E-Call and Bluetooth functions based on a single antenna, characterized by, The method is based on the antenna system of any one of claims 1-6 to realize E-Call and Bluetooth functions, and the method comprises the following steps: A collision state signal is acquired, and the collision state signal is subjected to voltage reduction processing by a signal preprocessing module to output a low-voltage PWM signal; A control module detects the received low-voltage PWM signal and sends an enable signal to an antenna switching switch module according to a detection result; The antenna switching switch module switches between an E-Call antenna mode and a Bluetooth antenna mode according to the enable signal to realize an emergency call function or a Bluetooth function.

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