Automobile and satellite communication device and phased array antenna thereof

Abstract

The utility model provides an automobile and a satellite communication device and a phased-array antenna thereof. The utility model aims to solve the technical problem that the existing phased-array antenna is not beneficial to expansion to the public market due to volume restriction. According to the technical scheme, the phased-array antenna comprises a first antenna group and a second antenna group, the first antenna group comprises a first receiving antenna and a first transmitting antenna; the second antenna group comprises a second receiving antenna and a second transmitting antenna; the first receiving antenna comprises one or more rows of first basic radiation units; the second receiving antenna comprises one or more rows of second basic radiation units; the first transmitting antenna comprises one or more rows of third basic radiation units; the second transmitting antenna comprises one or more rows of fourth basic radiation units. The phased-array antenna is suitable for a fragmented installation scene, and facilitates the expansion of broadband mobile satellite communication services to the public market. In addition, the utility model also provides a satellite communication device with the phased-array antenna and an automobile.

Description

Technical Field

[0001] The utility model relates to the technical field of satellite communications, in particular to a car and a satellite communication device thereof, and a phased array antenna. Background Art

[0002] Satellite communication systems have the advantages of wide coverage and strong anti-destruction capabilities, and are an emergency supplement to ground mobile communication networks. When there is no mobile communication network in the user's area, or the mobile communication network is paralyzed due to disasters, failures, etc., satellite communication is an effective means for users to continue to obtain communication services.

[0003] Satellite communications can be divided into narrowband communications and broadband communications according to bandwidth. Narrowband communications are mainly based on the L / S / C frequency bands, and have the characteristics of low transmission rate and small rain attenuation. Broadband communications are mainly based on the Ku / Ka frequency bands, and have faster transmission rates.

[0004] In recent years, narrowband mobile satellite communication services represented by Tiantong satellite and Beidou satellite have successfully entered the consumer smartphone market from the traditional professional emergency communication market, achieving a fundamental leap from the industry market to the mass market. However, due to the constraints of terminal cost and size, broadband mobile satellite communication services can only serve the fishing boat, aviation, emergency support and other industry markets, and cannot be expanded to the mass market.

[0005] Most of the existing broadband mobile satellite communication terminals directly arrange the radiation units into a plane array to form a whole phased array antenna; this phased array antenna needs to occupy a large area. In some fragmented installation scenarios, such as: the roof of a car with a skylight, it is difficult to provide a large enough area to install this phased array antenna. Summary of the invention

[0006] The purpose of the utility model is to provide a phased array antenna, which is applicable to fragmented installation scenarios and is conducive to expanding broadband mobile satellite communication services to the mass market. Based on the same inventive concept, another purpose of the utility model is to provide a satellite communication device and a car having the phased array antenna.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A phased array antenna, comprising: a first antenna group and a second antenna group; the first antenna group comprises: a first receiving antenna and a first transmitting antenna; the second antenna group comprises: a second receiving antenna and a second transmitting antenna; the first receiving antenna comprises one or more rows of first basic radiating elements; the second receiving antenna comprises one or more rows of second basic radiating elements; the first transmitting antenna comprises one or more rows of third basic radiating elements; the second transmitting antenna comprises one or more rows of fourth basic radiating elements.

[0009] Optionally, the first receiving antenna and the second receiving antenna are both in the shape of long strips; based on the same coordinate system, a straight line L1 is fitted with the center of each first basic radiating unit of the first receiving antenna, and a straight line L2 is fitted with the center of each second basic radiating unit of the second receiving antenna, and the angle between straight line L1 and straight line L2 is greater than or equal to 60 degrees.

[0010] Optionally, the angle between the straight line L1 and the straight line L2 is 90 degrees.

[0011] Optionally, the first transmitting antenna and the second transmitting antenna are both in the shape of long strips; based on the same coordinate system, a straight line L3 is fitted with the center of each third basic radiation unit of the first transmitting antenna, and a straight line L4 is fitted with the center of each fourth basic radiation unit of the second transmitting antenna, and the angle between straight line L3 and straight line L4 is greater than or equal to 60 degrees.

[0012] Optionally, the angle between the straight line L3 and the straight line L4 is 90 degrees.

[0013] The present application also provides a satellite communication device having the aforementioned phased array antenna.

[0014] Optionally, the satellite communication device also includes: a satellite communication module; the satellite communication module is connected to the first receiving antenna, the first transmitting antenna, the second receiving antenna, and the second transmitting antenna through a radio frequency cable.

[0015] Optionally, the satellite communication module includes: a satellite modem, an antenna group controller, and an external sensor group; the satellite modem includes a communication signal processor and a communication protocol processor; the external sensor group includes: vehicle-mounted satellite navigation positioning, an inertial navigation unit, and a magnetic compass.

[0016] The present application also provides a car having the aforementioned phased array antenna or satellite communication device.

[0017] Optionally, the car is provided with a sunroof on the roof; one of the first receiving antenna and the second receiving antenna is installed on the left side or right side of the sunroof, and the other is installed on the front side or rear side of the sunroof; one of the first transmitting antenna and the second transmitting antenna is installed on the left side or right side of the sunroof, and the other is installed on the front side or rear side of the sunroof.

[0018] The beneficial effects of the present invention are concentrated in the following aspects: compared with the existing phased array antennas arranged in a plane array, the present invention is provided with a discrete first receiving antenna, a first transmitting antenna, a second receiving antenna, and a second transmitting antenna, which are more suitable for fragmented installation scenarios; for example, for a car with a sunroof on the roof, the first receiving antenna, the first transmitting antenna, the second receiving antenna, and the second transmitting antenna can be arranged on the left side, right side, front side or rear side of the sunroof, thereby solving the pain point that small cars, especially small cars with sunroofs, are difficult to use broadband mobile satellite communication services. It can be seen that the present invention is suitable for fragmented installation scenarios, which is conducive to expanding broadband mobile satellite communication services to mass markets such as vehicle-mounted. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 Schematic diagram of setting up a phased array antenna on the roof of a car;

[0021] Figure 2 Schematic diagram of another way to set up a phased array antenna on the roof of a car.

[0022] Figure numerals: 1. first receiving antenna; 2. second receiving antenna; 3. first transmitting antenna; 4. second transmitting antenna; 5. first antenna group; 6. second antenna group; 7. skylight. DETAILED DESCRIPTION

[0023] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0024] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0027] The following is combined with Figure 1 ~Attached Figure 2 The embodiments of the present utility model are described in detail.

[0028] The embodiment of the utility model provides a phased array antenna. The phased array antenna includes: a first antenna group 5 and a second antenna group 6. It should be understood that, on the basis of the first antenna group 5 and the second antenna group 6, the phased array antenna can further be provided with a third antenna group, a fourth antenna group..., so as to be further applicable to more fragmented installation scenarios; at this time, according to actual conditions, the volume of the first antenna group 5 and the second antenna group 6 can be further reduced. The first antenna group 5 includes: a first receiving antenna 1 and a first transmitting antenna 3; the second antenna group 6 includes: a second receiving antenna 2 and a second transmitting antenna 4; the first receiving antenna 1 includes one or more rows of first basic radiating units; the second receiving antenna 2 includes one or more rows of second basic radiating units; the first transmitting antenna 3 includes one or more rows of third basic radiating units; the second transmitting antenna 4 includes one or more rows of fourth basic radiating units. It should be understood that the phased array antenna can be one of a passive phased array antenna and an active phased array antenna.

[0029] The specific implementation of the phased array antenna is described below: Compared with the existing phased array antenna arranged in a plane array, the phased array antenna is provided with a discrete first receiving antenna 1, a first transmitting antenna 3, a second receiving antenna 2, and a second transmitting antenna 4, which is more suitable for fragmented installation scenarios; for example: for a car with a sunroof 7 on the roof, the first receiving antenna 1, the first transmitting antenna 3, the second receiving antenna 2, and the second transmitting antenna 4 can be arranged on the left side, right side, front side or rear side of the sunroof 7, thereby solving the pain point that cars, especially cars with sunroofs 7, have difficulty in using broadband mobile satellite communication services. It can be seen that the phased array antenna is more suitable for fragmented installation scenarios, which is conducive to expanding broadband mobile satellite communication services to mass markets such as vehicle-mounted.

[0030] Furthermore, the first receiving antenna 1 and the second receiving antenna 2 are both in the shape of long strips; based on the same coordinate system, a straight line L1 is fitted with the center of each first basic radiation unit of the first receiving antenna 1, and a straight line L2 is fitted with the center of each second basic radiation unit of the second receiving antenna 2, and the angle between the straight line L1 and the straight line L2 is greater than or equal to 60 degrees. It should be understood that the plane where the straight line L1 and the straight line L2 are located can be regarded as the installation surface of the first receiving antenna 1 and the second receiving antenna 2; when arranging the first receiving antenna 1 and the second receiving antenna 2, it is preferred to keep the installation surface in a horizontal plane. The first receiving antenna 1 and the second receiving antenna 2 are usually arranged in a straight line, but sometimes, due to the limited installation environment, the first receiving antenna 1 or the second receiving antenna 2 may have ups and downs and bends; at this time, the least square method and other methods can be used to fit the straight line to facilitate the description of the positional relationship between the first receiving antenna 1 and the second receiving antenna 2. The closer the direction of the satellite signal is to perpendicularity with the length direction of the first receiving antenna 1, the better the effect of the first receiving antenna 1 receiving the signal; the closer the direction of the satellite signal is to parallelism with the length direction of the first receiving antenna 1, the worse the effect of the first receiving antenna 1 receiving the signal. The same is true for the second receiving antenna 2. The included angle between the first receiving antenna 1 and the second receiving antenna 2 is set to be greater than or equal to 60 degrees, and one of the first receiving antenna 1 and the second receiving antenna 2 always has a length direction greater than or equal to 30 degrees with the direction of the satellite signal, so as to ensure that the phased array antenna can always receive satellite signals well and stably.

[0031] Furthermore, the included angle between the straight line L1 and the straight line L2 is 90 degrees.

[0032] Furthermore, the first transmitting antenna 3 and the second transmitting antenna 4 are both in the shape of long strips; based on the same coordinate system, a straight line L3 is fitted with the center of each third basic radiation unit of the first transmitting antenna 3, and a straight line L4 is fitted with the center of each fourth basic radiation unit of the second transmitting antenna 4, and the angle between the straight line L3 and the straight line L4 is greater than or equal to 60 degrees. It should be understood that the arrangement of the first transmitting antenna 3 and the second transmitting antenna 4 can refer to the first receiving antenna 1 and the second receiving antenna 2, and will not be repeated here.

[0033] Furthermore, the included angle between the straight line L3 and the straight line L4 is 90 degrees.

[0034] The present application also provides a satellite communication device having the aforementioned phased array antenna.

[0035] Furthermore, the satellite communication device also includes: a satellite communication module; the satellite communication module is connected to the first receiving antenna 1, the first transmitting antenna 3, the second receiving antenna 2, and the second transmitting antenna 4 through a radio frequency cable.

[0036] Furthermore, the satellite communication module includes: a satellite modem, an antenna group controller, and an external sensor group; the satellite modem includes a communication signal processor and a communication protocol processor; the external sensor group includes: vehicle-mounted satellite navigation positioning, an inertial navigation unit, and a magnetic compass. It should be understood that the communication signal processor uses spread spectrum technology to process signals, and the communication protocol processor completes functions such as access, beam switching, and authentication. The antenna group controller selects an antenna group with a large angle between the length direction and the satellite signal direction according to the direction of the satellite signal; and points the beam of the communication satellite to be communicated based on the beam synthesis algorithm; the beam synthesis algorithm uses typical Chebyshev weighting or Taylor weighting for sidelobe suppression. Vehicle-mounted satellite navigation positioning can realize attitude determination based on carrier phase differential; the external sensor group provides the antenna group controller with complete vehicle position and orientation, pitch, roll and other attitude information.

[0037] The present application also provides a car having the aforementioned phased array antenna or satellite communication device.

[0038] Furthermore, the car is provided with a sunroof 7 on the roof; one of the first receiving antenna 1 and the second receiving antenna 2 is installed on the left side or right side of the sunroof 7, and the other is installed on the front side or rear side of the sunroof 7; one of the first transmitting antenna 3 and the second transmitting antenna 4 is installed on the left side or right side of the sunroof 7, and the other is installed on the front side or rear side of the sunroof 7. It should be understood that the roof of the car often has a certain curvature, so the first receiving antenna 1, the second receiving antenna 2, the first transmitting antenna 3 or the second transmitting antenna 4 installed on the edge of the roof may have certain undulations and bends. In this case, a beamforming algorithm can be used to compensate for the amplitude phase.

[0039] Although specific embodiments of the present invention are described above, those skilled in the art should understand that various changes or modifications may be made to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications are all within the scope of protection of the present invention.

Claims

1. A phased array antenna, characterized in that: include: A first antenna group (5) and a second antenna group (6); The first antenna group (5) comprises: a first receiving antenna (1) and a first transmitting antenna (3); The second antenna group (6) comprises: a second receiving antenna (2) and a second transmitting antenna (4); The first receiving antenna (1) comprises one or more rows of first basic radiation units; The second receiving antenna (2) comprises one or more rows of second basic radiation units; The first transmitting antenna (3) comprises one or more rows of third basic radiation units; The second transmitting antenna (4) comprises one or more rows of fourth basic radiation units.

2. The phased array antenna according to claim 1, characterized in that: The first receiving antenna (1) and the second receiving antenna (2) are both in the shape of long strips; Based on the same coordinate system, a straight line L1 is fitted with the center of each first basic radiation unit of the first receiving antenna (1), and a straight line L2 is fitted with the center of each second basic radiation unit of the second receiving antenna (2), and the angle between the straight line L1 and the straight line L2 is greater than or equal to 60 degrees.

3. The phased array antenna according to claim 2, characterized in that: The included angle between the straight line L1 and the straight line L2 is 90 degrees.

4. The phased array antenna according to any one of claims 1 to 3, characterized in that: The first transmitting antenna (3) and the second transmitting antenna (4) are both in the shape of long strips; Based on the same coordinate system, a straight line L3 is fitted with the center of each third basic radiation unit of the first transmitting antenna (3), and a straight line L4 is fitted with the center of each fourth basic radiation unit of the second transmitting antenna (4), and the angle between the straight line L3 and the straight line L4 is greater than or equal to 60 degrees.

5. The phased array antenna according to claim 4, characterized in that: The included angle between the straight line L3 and the straight line L4 is 90 degrees.

6. A satellite communication device, characterized in that: A phased array antenna according to any one of claims 1 to 5.

7. The satellite communication device according to claim 6, characterized in that: Also includes: satellite communication module; The satellite communication module is connected to the first receiving antenna (1), the first transmitting antenna (3), the second receiving antenna (2), and the second transmitting antenna (4) via a radio frequency cable.

8. The satellite communication device according to claim 7, characterized in that: The satellite communication module includes: a satellite modem, an antenna group controller, and an external sensor group; The satellite modem includes a communication signal processor and a communication protocol processor; The external sensor group includes: vehicle-mounted satellite navigation positioning, inertial navigation unit, and magnetic compass.

9. Automobile, characterized in that: A phased array antenna according to any one of claims 1 to 5, or a satellite communication device according to any one of claims 6 to 8.

10. The automobile according to claim 9, characterized in that: The car is provided with a skylight (7) on the roof; One of the first receiving antenna (1) and the second receiving antenna (2) is installed on the left side or the right side of the skylight (7), and the other is installed on the front side or the rear side of the skylight (7); One of the first transmitting antenna (3) and the second transmitting antenna (4) is installed on the left side or the right side of the skylight (7), and the other is installed on the front side or the rear side of the skylight (7).

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