A vehicle-mounted array antenna

Abstract

The utility model discloses a vehicle-mounted array antenna, including circuit board, two antenna modules (contain four radiating parts), through the phase difference of 0-180 degrees between two radiating parts, the pointing of electromagnetic field beam can be controlled, thereby realizes the beam angle regulation. Specifically to the vehicle-mounted scene, the beam tilt adjustment of electromagnetic field can be realized, makes the beam slanting downward radiation, covers the area of person close to the vehicle. Through the signal of 160-200 degrees phase difference between two antenna modules, the current flowing to two antenna modules respectively can be made homodromous, avoids the electromagnetic field beam cancellation phenomenon of two antenna modules. The coupler adopts the arrangement and folding design mode, can reduce the space occupation to the circuit board, is favorable to the miniaturization design of circuit board. Through the power division network formed by total power divider, first power divider, second power divider and the array antenna formed by four radiating parts of symmetric or relative symmetric setting, the uniform field shape of electromagnetic field beam tilt and omnidirectional coverage is realized finally.

Description

Technical Field

[0001] This utility model relates to the technical field of digital key products and their supporting products, and in particular to a vehicle-mounted array antenna. Background Technology

[0002] A digital key is an innovative car key that uses technologies such as Bluetooth and NFC to allow car owners to unlock and start their vehicles using smartphones, smartwatches, smart bracelets, and other devices. Compared to traditional keys, digital keys are more convenient and offer a more secure way to manage keys.

[0003] To improve the positioning accuracy of digital keys, multiple Bluetooth anchor points (similar to signal transmitters) need to be installed on the vehicle. These anchor points use Bluetooth signals to help mobile phones or smart devices determine distance and location, thereby enabling more accurate unlocking and starting functions. On some large vehicles (such as full-size SUVs), Bluetooth anchor points are usually installed on the B-pillar (the pillar between the door and the window). However, Bluetooth signal problems can occur due to the following reasons:

[0004] 1. The B-pillar is usually set at an angle, with its outer side facing diagonally upwards. This causes the Bluetooth antenna signal to radiate upwards instead of downwards to cover the area where people are close to the vehicle.

[0005] 2. Large vehicles (such as full-size SUVs) have a tall body. When a person walks into the vehicle, the Bluetooth signal received by the digital key will become very weak because the signal radiates upwards.

[0006] 3. The metal structure (sheet metal) of the B-pillar can also interfere with Bluetooth signals, further affecting the antenna field shape.

[0007] Therefore, it is necessary to invent a more widely applicable vehicle-mounted array antenna. Utility Model Content

[0008] In order to overcome the technical problem that the signal transmission module described in the prior art cannot meet the usage requirements in some application scenarios, this utility model provides a vehicle-mounted array antenna.

[0009] The technical solution adopted by this utility model to solve its problem is:

[0010] A vehicle-mounted array antenna, comprising:

[0011] Circuit board;

[0012] A first antenna module is provided on the circuit board. The first antenna module includes a first radiating part and a second radiating part. The first radiating part is used to radiate a first electromagnetic signal, and the second radiating part is used to radiate a second electromagnetic signal.

[0013] A second antenna module is provided on the circuit board. The second antenna module includes a third radiating part and a fourth radiating part. The third radiating part is used to radiate a third electromagnetic signal, and the fourth radiating part is used to radiate a fourth electromagnetic signal.

[0014] The phase difference between the first electromagnetic signal and the second electromagnetic signal is 0-180 degrees; the phase difference between the third electromagnetic signal and the fourth electromagnetic signal is 0-180 degrees.

[0015] In the above technical solution, the first antenna module generates a first electromagnetic field, and the second antenna module generates a second electromagnetic field. The phase difference (0-180 degrees) between the first electromagnetic signal generated by the first radiating part and the second electromagnetic signal generated by the second radiating part, and the phase difference (0-180 degrees) between the third electromagnetic signal generated by the third radiating part and the fourth electromagnetic signal generated by the fourth radiating part, respectively control the direction of the magnetic field beams of the two electromagnetic fields, thereby realizing beam angle adjustment. Specifically, in the vehicle scenario, the beam downtilt adjustment of the electromagnetic field can be realized.

[0016] As a preferred embodiment, the angle of the first electromagnetic signal is 0 degrees, and the second electromagnetic signal lags behind the first electromagnetic signal by 120 degrees; the angle of the third electromagnetic signal is 0 degrees, and the fourth electromagnetic signal lags behind the third electromagnetic signal by 120 degrees.

[0017] As a preferred embodiment, the first antenna module further includes a first signal input terminal and a first power divider. The first signal input terminal is connected to the first radiating part and the second radiating part respectively through the first power divider, so that the first signal input to the first signal input terminal is converted into the first electromagnetic signal and the second electromagnetic signal.

[0018] In the above technical solution, the first signal input terminal is used to input the first signal, and the first power divider is used to convert the first signal into two signals, which enter the first radiating part and the second radiating part respectively, so that the first radiating part and the second radiating part generate the first electromagnetic signal and the second electromagnetic signal respectively.

[0019] As a preferred embodiment, the second antenna module further includes a second signal input terminal and a second power divider. The second signal input terminal is connected to the third radiating part and the fourth radiating part through the second power divider, so that the second signal input to the second signal input terminal is converted into the third electromagnetic signal and the fourth electromagnetic signal.

[0020] In the above technical solution, the second signal input terminal is used to input the second signal, and the second power divider is used to convert the second signal into two signals with unequal phases, which enter the third radiating part and the fourth radiating part respectively, so that the third radiating part and the fourth radiating part generate the third electromagnetic signal and the fourth electromagnetic signal respectively.

[0021] As a preferred embodiment, the first power divider includes a first split coupler, which includes a first coupled microstrip line and a second coupled microstrip line coupled to each other. A first gap is provided between the first coupled microstrip line and the second coupled microstrip line. The first coupled microstrip line is connected to the first signal input terminal and to one of the first radiating section and the second radiating section. The second coupled microstrip line is connected to the other of the first radiating section and the second radiating section.

[0022] In the above technical solution, the first split coupler, composed of the first coupled microstrip line and the second coupled microstrip line, can realize the signal distribution and transmission functions and is the key part of the first power divider. The above connection method enables the first split signal input to the first split signal input terminal to be transmitted to the first radiating part and the second radiating part respectively through the coupling effect of the first coupled microstrip line and the second coupled microstrip line, realizing signal distribution and phase conversion, and finally forming two split signals with a phase difference of 0-180 degrees (i.e., the first electromagnetic signal and the second electromagnetic signal).

[0023] As a preferred embodiment, the second power divider includes a second split coupler, which includes a third coupled microstrip line and a fourth coupled microstrip line coupled to each other. A second gap is provided between the third coupled microstrip line and the fourth coupled microstrip line. The third coupled microstrip line is connected to the second signal input terminal and to one of the third radiating section and the fourth radiating section. The fourth coupled microstrip line is connected to the other of the third radiating section and the fourth radiating section.

[0024] In the above technical solution, the second split coupler, composed of the third and fourth coupled microstrip lines, enables signal distribution and transmission, and is a key component of the second power divider. This connection method allows the second signal input to the second signal divider input terminal to be transmitted to the third and fourth radiating sections respectively through the coupling effect of the third and fourth coupled microstrip lines, achieving signal distribution and phase conversion, ultimately forming two split signals with a 0-180 degree phase difference (i.e., the third electromagnetic signal and the fourth electromagnetic signal).

[0025] As a preferred embodiment, the phase difference between the first sub-signal and the second sub-signal is 160-200 degrees.

[0026] As a preferred embodiment, the vehicle-mounted array antenna further includes a total signal input terminal and a total power divider. The total signal input terminal is connected to the first sub-signal input terminal and the second sub-signal input terminal respectively through the total power divider, so that the total signal input to the total signal input terminal is converted into the first sub-signal and the second sub-signal with a phase difference of 160-200 degrees.

[0027] In the above technical solution, the total signal input terminal is used to input the total signal, and the total power divider is used to convert the total signal into two signals with a phase difference of 160-200 degrees, which are respectively input to the first signal input terminal and the second signal input terminal. Finally, the first signal and the second signal with a phase difference of 160-200 degrees are input to the first signal input terminal and the second signal input terminal, respectively.

[0028] As a preferred embodiment, the power divider includes a main coupler comprising a fifth coupled microstrip line, a sixth coupled microstrip line, and a seventh coupled microstrip line coupled to each other. A third gap is formed between the fifth coupled microstrip line and the sixth coupled microstrip line, and a fourth gap is formed between the sixth coupled microstrip line and the seventh coupled microstrip line. The fifth coupled microstrip line is connected to the main signal input terminal and to one of the first and second sub-signal input terminals, while the seventh coupled microstrip line is connected to the other of the first and second sub-signal input terminals.

[0029] In the above technical solution, the main coupler composed of the fifth, sixth, and seventh coupled microstrip lines can realize the distribution and transmission of the main signal and is a key component of the main power divider. This connection method allows the main signal input to the main signal input terminal to be transmitted to the first and second signal input terminals respectively through the coupling effect of the fifth, sixth, and seventh coupled microstrip lines, achieving signal distribution and phase conversion, ultimately forming two signal sub-signals with a phase difference of 160-200 degrees.

[0030] As a preferred embodiment, the fifth coupling microstrip line, the sixth coupling microstrip line, and the seventh coupling microstrip line are arranged sequentially, and each of the fifth coupling microstrip line, the sixth coupling microstrip line, and the seventh coupling microstrip line is folded at least once.

[0031] In the above technical solution, by arranging and folding the design, the space occupied by the circuit board can be reduced while ensuring that each coupled microstrip line has sufficient length and does not affect the coupling function, which is conducive to the miniaturization design of the circuit board.

[0032] As a preferred embodiment, the first radiating portion and the second radiating portion, the third radiating portion and the fourth radiating portion are respectively disposed on both sides of the circuit board in the X-axis direction.

[0033] In the above technical solution, the first radiating part and the second radiating part constitute a set of antennas, and the first electromagnetic field generated by the combination covers one side of the circuit board in the X-axis direction; the third radiating part and the fourth radiating part constitute another set of antennas, and the second electromagnetic field generated by the combination covers the other side of the circuit board in the X-axis direction; finally, the magnetic field formed is arranged symmetrically or relatively symmetrically in the X-axis direction, which solves the problem of uneven field distribution caused by a single-sided antenna on the PCB board.

[0034] As a preferred embodiment, the first radiating part and the third radiating part, and the second radiating part and the fourth radiating part are respectively disposed on both sides of the circuit board in the Y-axis direction.

[0035] In the above technical solution, the first radiating part and the third radiating part can also form a set of antennas, and the second radiating part and the fourth radiating part can form another set of antennas. The first electromagnetic signal and the third electromagnetic signal generated by the first radiating part and the third radiating part have a phase difference of 0-180 degrees with the second electromagnetic signal and the fourth electromagnetic signal generated by the second radiating part and the fourth radiating part. The direction of the electromagnetic field beam is controlled by the phase difference, thereby realizing the beam angle adjustment.

[0036] In summary, the vehicle-mounted array antenna provided by this utility model has at least the following technical advantages compared to the prior art:

[0037] 1) The first antenna module generates a first electromagnetic field. The electromagnetic signals emitted by the first and second radiating parts of the first antenna module have a phase difference of 0-180 degrees. This phase difference is used to control the direction of the electromagnetic field beam, thereby achieving beam angle adjustment. Specifically, in automotive scenarios (e.g., applied to the B-pillar sheet metal of a car), beam downtilt adjustment of the electromagnetic field can be achieved, causing the beam to radiate downwards, covering the area where people are close to the vehicle, meeting the needs of multiple usage scenarios. Similarly, the second antenna module generates a second electromagnetic field, and the phase difference between the electromagnetic signals emitted by the third and fourth radiating parts of the second antenna module can also achieve beam downtilt adjustment of the second electromagnetic field.

[0038] 2) The first electromagnetic field generated by the first antenna module covers one side of the circuit board along the X-axis, and the second electromagnetic field generated by the second antenna module covers the other side of the circuit board along the X-axis. This results in the overall electromagnetic field being symmetrically or relatively symmetrically arranged along the X-axis, solving the problem of uneven field distribution caused by a single-sided onboard antenna. Specifically, in automotive scenarios (e.g., applied to the B-pillar sheet metal of a car), electromagnetic field coverage of the front and rear areas of the vehicle's B-pillar can be achieved using a single automotive array antenna, reducing costs.

[0039] 3) The power divider makes the output signal (i.e. the first and second signals flowing into the two signal input terminals) have a phase difference of 160-200 degrees, thereby making the two currents flowing to the first antenna module and the second antenna module in the same direction, thus avoiding the electromagnetic field beam cancellation phenomenon of the two antenna modules.

[0040] 4) Through the power dividing network formed by the main power divider, the first power divider, and the second power divider, and the array antenna formed by the four radiating parts arranged symmetrically or relatively symmetrically in the X and Y axes, a uniform field shape with downward tilting electromagnetic field beam and omnidirectional coverage is finally achieved. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of the vehicle-mounted array antenna of this utility model;

[0042] Figure 2 This is a schematic diagram of the structure of the first power divider of this utility model;

[0043] Figure 3 This is a schematic diagram of the power divider of this utility model;

[0044] Figure 4 This is a schematic diagram of the vehicle-mounted array antenna of this utility model applied to the B-pillar of a car.

[0045] The meanings of the reference numerals in the attached figures are as follows:

[0046] 1. Circuit board; 2. Second radiating section; 3. Third radiating section; 4. First signal input terminal; 5. First power divider; 6. First coupler; 61. First coupling microstrip line; 62. Second coupling microstrip line; 7. Total signal input terminal; 8. Total power divider; 9. Total coupler; 91. Fifth coupling microstrip line; 92. Sixth coupling microstrip line; 93. Seventh coupling microstrip line; 10. Car B-pillar. Detailed Implementation

[0047] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0048] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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, they should not be construed as limitations on this utility model.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0050] See Figure 1 As shown in the embodiment of this utility model, the vehicle-mounted array antenna includes a circuit board 1, a first antenna module, and a second antenna module, which are disposed on the circuit board 1. The first antenna module generates a first electromagnetic field, and the second antenna module generates a second electromagnetic field.

[0051] The first antenna module includes a first radiating part 2 and a second radiating part 3. The first radiating part 2 radiates a first electromagnetic signal, and the second radiating part 3 radiates a second electromagnetic signal. The phase difference between the first and second electromagnetic signals is 0-180 degrees. Similarly, the second antenna module includes a third radiating part and a fourth radiating part (not marked in the figure). The third radiating part radiates a third electromagnetic signal, and the fourth radiating part radiates a fourth electromagnetic signal. The phase difference between the third and fourth electromagnetic signals is 0-180 degrees. Specifically, when the two radiating sources of the first antenna module and the two radiating sources of the second antenna module have the aforementioned phase difference, the direction of the electromagnetic field beam synthesized by them in space will change accordingly according to the phase difference, thereby achieving beam angle adjustment.

[0052] See Figure 4 As shown, when applying the vehicle-mounted array antenna to a vehicle-mounted application scenario, the circuit board 1 of the vehicle-mounted array antenna can be attached to the outer side of the sheet metal of the B-pillar 10 of the car. This allows for the adjustment of the electromagnetic field beam downwards based on the phase difference of the radiation source, enabling the beam to radiate downwards and cover the area where people are close to the vehicle, thus meeting the usage requirements of different scenarios.

[0053] In a preferred embodiment, the angle of the first electromagnetic signal is preferably 0 degrees (the degree is used to indicate the propagation direction of the electromagnetic beam), the second electromagnetic signal is preferably 120 degrees behind the first electromagnetic signal; the angle of the third electromagnetic signal is preferably 0 degrees, and the fourth electromagnetic signal is preferably 120 degrees behind the third electromagnetic signal.

[0054] See Figure 1 and Figure 2As shown, in a preferred embodiment of this utility model, the first antenna module further includes a first signal input terminal 4 and a first power divider 5. The first signal input terminal 4 is connected to the first radiating section 2 and the second radiating section 3 respectively through the first power divider 5, so that the first signal input to the first signal input terminal 4 is converted into a first electromagnetic signal and a second electromagnetic signal. Specifically, the first signal input terminal 4 is used to input the first signal. After processing by the first power divider 5, the first signal is converted into two signals with a phase difference (0-180 degrees), which are transmitted to the first radiating section 2 and the second radiating section 3 respectively, so that the first radiating section 2 and the second radiating section 3 radiate the first electromagnetic signal and the second electromagnetic signal respectively.

[0055] Similarly, the second antenna module also includes a second signal input terminal and a second power divider (not marked in the figure). The second signal input terminal is connected to the third and fourth radiating sections via the second power divider, respectively, so that the second signal input to the second signal input terminal is converted into the third and fourth electromagnetic signals. The connection relationship between the second signal input terminal, the second power divider, and the third and fourth radiating sections is the same as that of the first antenna module. The specific technical effects and functional principles that can be achieved will not be elaborated here.

[0056] See Figure 2 As shown, in an optional embodiment, the first power divider 5 includes a first split coupler 6. The first split coupler 6 includes a first coupling microstrip line 61 and a second coupling microstrip line 62 coupled to each other. A first gap is provided between the first coupling microstrip line 61 and the second coupling microstrip line 62. The first coupling microstrip line 61 is connected to the first signal input terminal 4 and to one of the first radiating section 2 and the second radiating section 3. The second coupling microstrip line 62 is connected to the other of the first radiating section 2 and the second radiating section 3. Specifically, the first split coupler 6, composed of the first coupling microstrip line 61 and the second coupling microstrip line 62, can realize the signal distribution and transmission function and is the key structure of the first power divider 6. The above connection method enables the first signal input to the first signal input terminal 4 to be transmitted to the first radiating section 2 and the second radiating section 3 respectively through the coupling effect of the first coupling microstrip line 61 and the second coupling microstrip line 62, realizing signal distribution and phase conversion, and finally forming two split signals (i.e., the first electromagnetic signal and the second electromagnetic signal) with a phase difference of 0-180 degrees.

[0057] Similarly, the second power divider includes a second split coupler, which comprises a third coupled microstrip line and a fourth coupled microstrip line (not marked in the figure) coupled to each other. A second gap is provided between the third and fourth coupled microstrip lines. The third coupled microstrip line is connected to the second signal input terminal and to one of the third and fourth radiating sections. The fourth coupled microstrip line is connected to the other of the third and fourth radiating sections. The design of the second split coupler is the same as that of the first split coupler; the specific technical effects and functional principles will not be elaborated here.

[0058] More specifically, the first split coupler 6 and the second split coupler can be arbitrary phase difference directional couplers to achieve phase difference signal conversion from 0 to 180 degrees.

[0059] Furthermore, the first gap is located between the first coupled microstrip line 61 and the second coupled microstrip line 62, and the second gap is located between the third coupled microstrip line and the fourth coupled microstrip line.

[0060] In a preferred embodiment of this invention, the phase difference between the first and second sub-signals is 160-200 degrees. Specifically, if the first and second sub-signals are in phase, the currents flowing to the two first antenna modules and the second antenna module will be in opposite directions due to the symmetrical or relatively symmetrical arrangement of the first and second antenna modules on both sides of the X-axis, resulting in the cancellation of the magnetic field beams generated by the first and second antenna modules. However, in this embodiment, by making the phase difference between the first and second sub-signals 160-200 degrees, the currents flowing to the two first antenna modules and the second antenna module can be made to flow in the same direction, thus avoiding beam cancellation.

[0061] See Figure 1 and Figure 3 As shown, in a preferred embodiment, the vehicle-mounted array antenna further includes a total signal input terminal 7 and a total power divider 8. The total signal input terminal 7 is used to input the total signal, and the total power divider 8 is used to perform signal conversion. Specifically, the total signal input terminal 7 is connected to the first signal input terminal 4 and the second signal input terminal through the total power divider 8, so that the total signal input to the total signal input terminal 7 is converted into the first signal and the second signal with a phase difference of 160-200 degrees, and then enters the first signal input terminal 4 and the second signal input terminal, respectively.

[0062] See Figure 3As shown, in a preferred solution of this embodiment, the total power splitter 8 includes a total coupler 9. The total coupler 9 includes a fifth coupling microstrip line 91, a sixth coupling microstrip line 92, and a seventh coupling microstrip line 93 that are mutually coupled. A third gap is formed between the fifth coupling microstrip line 91 and the sixth coupling microstrip line 92, and a fourth gap is formed between the sixth coupling microstrip line 92 and the seventh coupling microstrip line 93. Among them, by appropriately adjusting the widths of the third gap and the fourth gap, the coupling coefficients between the respective coupling microstrip lines can be changed, thereby realizing the adjustment of the operating frequency.

[0063] See Figure 3 As shown, the fifth coupling microstrip line 91 is connected to the total signal input terminal 7, and is also connected to one of the first sub-signal input terminal 4 and the second sub-signal input terminal. The seventh coupling microstrip line 93 is connected to the other of the first sub-signal input terminal 4 and the second sub-signal input terminal. Specifically, the total coupler 9 composed of the respective coupling microstrip lines can realize the functions of total signal distribution and transmission, and is the key part of the total power splitter 8. The above connection method enables the total signal input from the total signal input terminal to be respectively transmitted to the first sub-signal input terminal 4 and the second sub-signal input terminal through the coupling action of the respective coupling microstrip lines, realizing signal distribution and phase conversion, and finally forming two sub-signals with a phase difference of 160 - 200 degrees.

[0064] More specifically, the total coupler 9 can adopt a 160 - 200 degree directional coupler formed by combining two 90 degree directional couplers, thereby realizing phase difference signal conversion.

[0065] See Figure 3 As shown, in a preferred solution of this embodiment, the fifth coupling microstrip line 91, the sixth coupling microstrip line 92, and the seventh coupling microstrip line 93 are arranged in sequence, and the fifth coupling microstrip line 91, the sixth coupling microstrip line 92, and the seventh coupling microstrip line 93 are each arranged with at least one fold. Specifically, through the above arrangement and folding design method, the space occupied by the circuit board 1 can be reduced on the premise of ensuring that each coupling microstrip line has sufficient length and does not affect the coupling function, and thus it is beneficial to the miniaturization design of the circuit board 1.

[0066] More specifically, the fifth coupling microstrip line 91, the sixth coupling microstrip line 92, and the seventh coupling microstrip line 93 are each folded at least twice, thereby forming a "匚"-shaped structure.

[0067] See Figure 1 As shown, in an alternative solution of this embodiment, the first radiation part 2 and the second radiation part 3, and the third radiation part and the fourth radiation part are respectively arranged on both sides in the X-axis direction of the circuit board 1. In this solution, the first radiation part 2 and the second radiation part 3 can form a set of antennas, and the combined first electromagnetic field covers one side area in the X-axis direction of the circuit board 1 (see Figure 4As shown, if installed on the B-pillar 10 of a car, it covers the front region of the B-pillar 10 in the X-axis direction; the third and fourth radiating parts constitute another set of antennas, and the combined second electromagnetic field covers the other side region of the circuit board 1 in the X-axis direction (see...). Figure 4 As shown, if installed on the B-pillar 10 of a car, it would be the rear region of the B-pillar 10 in the X-axis direction. Ultimately, this ensures that the resulting electromagnetic field is symmetrically or relatively symmetrically arranged in the X-axis direction, solving the problem of uneven field distribution caused by a single-sided antenna on the PCB board. Thus, electromagnetic field coverage of the front and rear regions of the B-pillar 10 can be achieved through a single vehicle-mounted array antenna, reducing costs.

[0068] See Figure 1 As shown, in an optional embodiment, the first radiating part 2 and the third radiating part, and the second radiating part 3 and the fourth radiating part are respectively disposed on both sides of the circuit board along the Y-axis. In this embodiment, the first radiating part 2 and the third radiating part can also form one antenna, and the second radiating part 3 and the fourth radiating part can form another antenna. The first electromagnetic signal and the third electromagnetic signal generated by the first radiating part 2 and the third radiating part have a phase difference of 0-180 degrees with the second electromagnetic signal and the fourth electromagnetic signal generated by the second radiating part 3 and the fourth radiating part. The direction of the electromagnetic field beam is controlled by this phase difference, thereby realizing beam angle adjustment.

[0069] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A vehicle-mounted array antenna, characterized in that, include: Circuit board; A first antenna module is provided on the circuit board. The first antenna module includes a first radiating part and a second radiating part. The first radiating part is used to radiate a first electromagnetic signal, and the second radiating part is used to radiate a second electromagnetic signal. A second antenna module is provided on the circuit board. The second antenna module includes a third radiating part and a fourth radiating part. The third radiating part is used to radiate a third electromagnetic signal, and the fourth radiating part is used to radiate a fourth electromagnetic signal. The phase difference between the first electromagnetic signal and the second electromagnetic signal is 0-180 degrees; the phase difference between the third electromagnetic signal and the fourth electromagnetic signal is 0-180 degrees.

2. The vehicle-mounted array antenna according to claim 1, characterized in that, The first electromagnetic signal has an angle of 0 degrees, and the second electromagnetic signal lags behind the first electromagnetic signal by 120 degrees; the third electromagnetic signal has an angle of 0 degrees, and the fourth electromagnetic signal lags behind the third electromagnetic signal by 120 degrees.

3. The vehicle-mounted array antenna according to claim 1, characterized in that, The first antenna module further includes a first signal input terminal and a first power divider. The first signal input terminal is connected to the first radiating part and the second radiating part through the first power divider, so that the first signal input to the first signal input terminal is converted into the first electromagnetic signal and the second electromagnetic signal. The second antenna module further includes a second signal input terminal and a second power divider. The second signal input terminal is connected to the third radiating part and the fourth radiating part through the second power divider, so that the second signal input at the second signal input terminal is converted into the third electromagnetic signal and the fourth electromagnetic signal.

4. The vehicle-mounted array antenna according to claim 3, characterized in that, The first power divider includes a first split coupler, which includes a first coupled microstrip line and a second coupled microstrip line coupled to each other. A first gap is provided between the first coupled microstrip line and the second coupled microstrip line. The first coupled microstrip line is connected to the first signal input terminal and to one of the first radiating part and the second radiating part. The second coupled microstrip line is connected to the other of the first radiating part and the second radiating part.

5. The vehicle-mounted array antenna according to claim 3, characterized in that, The second power divider includes a second split coupler, which includes a third coupled microstrip line and a fourth coupled microstrip line coupled to each other. A second gap is provided between the third coupled microstrip line and the fourth coupled microstrip line. The third coupled microstrip line is connected to the second signal input terminal and to one of the third radiating section and the fourth radiating section. The fourth coupled microstrip line is connected to the other of the third radiating section and the fourth radiating section.

6. The vehicle-mounted array antenna according to claim 3, characterized in that, The phase difference between the first sub-signal and the second sub-signal is 160-200 degrees.

7. The vehicle-mounted array antenna according to claim 6, characterized in that, It also includes a total signal input terminal and a total power divider. The total signal input terminal is connected to the first sub-signal input terminal and the second sub-signal input terminal respectively through the total power divider, so that the total signal input to the total signal input terminal is converted into the first sub-signal and the second sub-signal.

8. The vehicle-mounted array antenna according to claim 7, characterized in that, The power divider includes a main coupler, which includes a fifth coupled microstrip line, a sixth coupled microstrip line, and a seventh coupled microstrip line that are coupled to each other. A third gap is formed between the fifth coupled microstrip line and the sixth coupled microstrip line, and a fourth gap is formed between the sixth coupled microstrip line and the seventh coupled microstrip line. The fifth coupled microstrip line is connected to the total signal input terminal and to one of the first and second sub-signal input terminals, and the seventh coupled microstrip line is connected to the other of the first and second sub-signal input terminals.

9. The vehicle-mounted array antenna according to claim 8, characterized in that, The fifth, sixth, and seventh coupled microstrip lines are arranged sequentially, and each of the fifth, sixth, and seventh coupled microstrip lines is folded at least once.

10. The vehicle-mounted array antenna according to any one of claims 1-9, characterized in that, The first radiating part and the second radiating part, the third radiating part and the fourth radiating part are respectively disposed on both sides of the circuit board in the X-axis direction; the first radiating part and the third radiating part, the second radiating part and the fourth radiating part are respectively disposed on both sides of the circuit board in the Y-axis direction.

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