Multi-band array antenna and positioning device

Abstract

The utility model discloses a multi-band array antenna and a positioning device. The multi-band array antenna comprises a first antenna array, a second antenna array and a multi-band combined antenna which are arranged on the same side of a circular antenna array disc, the first antenna array comprises four first antenna units which are arranged on the first circumference of the circular antenna array disc at equal intervals; the second antenna array comprises four second antenna units which are arranged on a second circumference of the circular antenna array disc at equal intervals, and the diameter of the second circumference is smaller than that of the first circumference; the multi-band combined antenna comprises at least two third antenna units which are overlapped at the circle center of the circular antenna array disc, and the working bands of the third antenna units are different; the working frequency band of the first antenna unit is lower than that of the second antenna unit, and a groove is formed in the circular antenna array disc between each second antenna unit and the adjacent first antenna unit. According to the technical scheme of the embodiment of the utility model, the multi-band array antenna with relatively strong anti-interference performance is provided.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to antenna technology, especially to a multi-frequency array antenna and positioning system. BACKGROUND

[0002] With the development of satellite positioning technology, applications related to satellite positioning systems have been vigorously developed, for example, automatic driving, unmanned aerial vehicle and other applications all rely on high-precision positioning of satellite positioning systems. In order to improve the positioning accuracy of satellite positioning systems, the current positioning equipment often receives satellite signals of different frequency bands of multiple satellite positioning systems such as Beidou, global positioning system (GPS), global navigation satellite system (GLONASS), etc., realizes multi-system joint positioning, and further improves the positioning accuracy through real-time difference technology.

[0003] But for the positioning equipment receiving satellite signals of multiple satellite positioning systems, since the antenna needs to receive satellite signals of multiple different frequency bands, the antenna of the positioning equipment works in a complex electromagnetic interference environment. Then how to solve the interference between signals of different frequency bands is the key to improve the signal receiving ability of the positioning equipment. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of multi-frequency array antenna and positioning equipment, provide a kind of multi-frequency array antenna with stronger anti-interference performance.

[0005] In the first aspect, the utility model embodiment provides a kind of multi-frequency array antenna, comprising: first antenna array, second antenna array and multi-frequency combined antenna being arranged on the same side of circular antenna array disc;

[0006] The first antenna array includes four first antenna units, the four first antenna units are equidistantly arranged on the first circumference of the circular antenna array disc, and the four first antenna units are of the same size;

[0007] The second antenna array includes four second antenna units, the four second antenna units are equidistantly arranged on the second circumference of the circular antenna array disc, and the four second antenna units are of the same size, and the diameter of the second circumference is less than the diameter of the first circumference;

[0008] The multi-frequency combined antenna includes at least two third antenna units, the at least two third antenna units are overlapped and arranged at the center of the circular antenna array disc, and the working frequency band of each third antenna unit is different;

[0009] The working frequency range of the first antenna unit is lower than that of the second antenna unit, and a groove is arranged on the circular antenna array disc between each second antenna unit and the adjacent first antenna unit.

[0010] In a possible implementation manner of the first aspect, the included angle between each second antenna unit and the adjacent two first antenna units is the same.

[0011] In a possible implementation manner of the first aspect, the groove extends from a corner of each second antenna unit close to the first antenna unit to the edge of the circular antenna array disc.

[0012] In a possible implementation manner of the first aspect, the groove is formed by cutting the part of the circular antenna array disc from the two sides of the groove to the center.

[0013] In a possible implementation manner of the first aspect, the multi-frequency range combined antenna comprises three third antenna units.

[0014] In a possible implementation manner of the first aspect, the first antenna unit is a B3 frequency range antenna unit of the Beidou navigation system, the working frequency range of the second antenna unit is an S frequency range of the Beidou navigation system, and the working frequency ranges of the three third antenna units are respectively a B2, B3 frequency range of the Beidou navigation system, an S frequency range of the Beidou navigation system and a B1, L frequency range of the Beidou navigation system.

[0015] In a possible implementation manner of the first aspect, among the three third antenna units, the third antenna unit of the B2, B3 frequency range, the third antenna unit of the B1, L frequency range and the third antenna unit of the S frequency range are sequentially arranged upward from the circular antenna array disc.

[0016] In a possible implementation manner of the first aspect, the distance between the center of the first antenna unit and the center of the circular antenna array disc is between 100 mm and 130 mm.

[0017] In a possible implementation manner of the first aspect, the distance between the center of the second antenna unit and the center of the circular antenna array disc is between 55 mm and 70 mm.

[0018] In a second aspect, the embodiments of the utility model provide a positioning device, the positioning device comprises a baseband processing unit, a radio frequency processing unit and an antenna, the antenna is the multi-frequency range array antenna of any possible implementation manner of the first aspect;

[0019] The multi-frequency range array antenna is used for receiving satellite positioning signals of multiple frequency ranges, the radio frequency processing unit is used for processing the received satellite positioning signals of multiple frequency ranges into multiple baseband signals, and the baseband processing unit is used for obtaining a composite positioning result based on the multiple baseband signals.

[0020] The multi-frequency band array antenna and the positioning device provided by the embodiment of the utility model have multiple working frequency bands, the antenna units with different working frequency bands are arranged at intervals, and the grooves are arranged between the adjacent first antenna units and second antenna units, so that the interference between the antenna units with different frequency bands is reduced, and the multi-frequency band array antenna with strong anti-interference performance is provided. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 The utility model provides a kind of top view of multi-frequency band array antenna provided by the embodiment of the utility model;

[0022] Fig. 2 The utility model provides a kind of side view of multi-frequency band array antenna provided by the embodiment of the utility model;

[0023] Fig. 3 The utility model provides a kind of oblique view of multi-frequency band array antenna provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0024] The utility model will be further explained in detail in combination with the drawings and embodiment.It can be understood that the specific embodiment described here is only used to explain the utility model, and is not limited to the utility model.In addition, it needs to be explained that, for the convenience of description, only part of the structure related to the utility model is shown in the drawings, not all structures.

[0025] Figs. 1-3 The utility model provides a kind of structure schematic view of multi-frequency band array antenna provided by the embodiment of the utility model, wherein Fig. 1 The utility model provides a kind of top view of multi-frequency band array antenna provided by the embodiment of the utility model, Fig. 2 The utility model provides a kind of side view of multi-frequency band array antenna provided by the embodiment of the utility model, Fig. 3 The utility model provides a kind of oblique view of multi-frequency band array antenna provided by the embodiment of the utility model.As shown in Figs. 1-3 The utility model provides a kind of multi-frequency band array antenna, which comprises:

[0026] The circular antenna array disk 4, the first antenna array, the second antenna array and the multi-band combined antenna 3. The first antenna array includes four first antenna units 1, the second antenna array includes four second antenna units 2, and the multi-band combined antenna 3 includes at least two third antenna units with different working frequency bands. The first antenna array, the second antenna array and the multi-band combined antenna 3 are arranged on the same side surface of the circular antenna array disk 4.

[0027] The four first antenna units 1 of the first antenna array are arranged on a first circumference of the circular antenna array disk 4 with the center of the circular antenna array disk 4 as the center, and the four first antenna units 1 are arranged at equal intervals. That is, the four first antenna units 1 are evenly arranged on the first circumference of the circular antenna array disk 4, and adjacent first antenna units 1 are spaced apart by 90 degrees on the first circumference. Each first antenna unit 1 of the first antenna array forms an antenna array, so the working frequency bands of the first antenna units 1 are the same, and in addition, each first antenna unit 1 has the same size.

[0028] The four second antenna units 2 of the second antenna array are arranged on a second circumference of the circular antenna array disk 4 with the center of the circular antenna array disk 4 as the center, and the four second antenna units 2 are arranged at equal intervals. That is, the four second antenna units 2 are evenly arranged on the second circumference of the circular antenna array disk 4, and adjacent second antenna units 2 are spaced apart by 90 degrees on the second circumference. Each second antenna unit 2 of the second antenna array forms an antenna array, so the working frequency bands of the second antenna units 2 are the same, and in addition, each second antenna unit 2 has the same size. The diameter of the second circumference is smaller than the diameter of the first circumference, that is, each first antenna unit 1 of the first antenna array is arranged on the outer side of the circular antenna array disk 4, and each second antenna unit 2 of the second antenna array is arranged on the inner side of the circular antenna array disk 4. The working frequency bands of the first antenna units 1 and the second antenna units 2 are different. The antenna units in the first antenna array and the second antenna array can be arranged alternately, that is, as shown in the figure, each second antenna unit 2 in the second antenna array is located between two adjacent first antenna units 1. Preferably, the included angle between each second antenna unit 2 and the two adjacent first antenna units 1 is the same, that is, the included angle between each first antenna unit 1 and the two nearest second antenna units 2 is 45 degrees. The working frequency band of the first antenna unit 1 is lower than that of the second antenna unit 2. Since the diameter of the first circumference on which the first antenna units 1 are arranged is larger than that of the second circumference on which the second antenna units 2 are arranged, the circumference of the first circumference is larger than that of the second circumference, so arranging the first antenna units 1 with larger size on the first circumference can make the gap between adjacent first antenna units 1 larger, which is beneficial to improving the radiation performance of the second antenna units 2. Fig. 1 The working frequency bands of the first antenna units 1 and the second antenna units 2 are different. The antenna units in the first antenna array and the second antenna array can be arranged alternately, that is, as shown in the figure, each second antenna unit 2 in the second antenna array is located between two adjacent first antenna units 1. Preferably, the included angle between each second antenna unit 2 and the two adjacent first antenna units 1 is the same, that is, the included angle between each first antenna unit 1 and the two nearest second antenna units 2 is 45 degrees. The working frequency band of the first antenna unit 1 is lower than that of the second antenna unit 2. Since the diameter of the first circumference on which the first antenna units 1 are arranged is larger than that of the second circumference on which the second antenna units 2 are arranged, the circumference of the first circumference is larger than that of the second circumference, so arranging the first antenna units 1 with larger size on the first circumference can make the gap between adjacent first antenna units 1 larger, which is beneficial to improving the radiation performance of the second antenna units 2.

[0029] Since the first antenna array and the second antenna array have antenna elements in four different directions respectively, the first antenna array and the second antenna array can effectively resist interference signals from four different directions in the working frequency bands of the first antenna array and the second antenna array, and have great advantages in interference resistance.

[0030] A groove 5 is arranged on the circular antenna array disc between each second antenna element 2 and the adjacent first antenna element 1. The groove 5 can improve the performance of the first antenna element 1 and the second antenna element 2, especially the low-elevation-angle performance. The size and form of the groove 5 can be set according to requirements. In an embodiment, the groove 5 extends from one corner of each second antenna element 2 close to the first antenna element 1 to the edge of the circular antenna array disc 5, so as to further improve the radiation performance of the first antenna element 1 and the second antenna element 2. Specifically, the groove 5 can be formed by cutting part of the circular antenna array disc 4 from the two sides of the groove 4 to the center, that is, the groove is “V”-shaped.

[0031] The multi-frequency combined antenna 3 is composed of at least two third antenna elements, and the at least two third antenna elements are arranged in the center of the circular antenna array disc 4. The working frequency bands of each third antenna element are different, so that the multi-frequency combined antenna 3 has multiple working frequency bands.

[0032] Each of the first antenna element 1, the second antenna element 2, and the third antenna element is composed of a dielectric substrate and a radiator arranged on the dielectric substrate. The parameters of the dielectric substrate and the radiator of each first antenna element 1 are the same, the parameters of the dielectric substrate and the radiator of each second antenna element 2 are the same, and the dielectric substrate and the radiator of the first antenna element 1, the second antenna element 2, and each third antenna element can be the same or different.

[0033] The multi-frequency array antenna provided in the embodiment has the first antenna array, the second antenna array, and the multi-frequency combined antenna arranged on the circular antenna array disc, and has the groove arranged on the circular antenna array disc between each second antenna element of the second antenna array and the adjacent first antenna element of the first antenna array. Since the working frequency band of the antenna element of the first antenna array is lower than the working frequency band of the antenna element in the second antenna array, and the multi-frequency combined antenna is composed of multiple third antenna elements with different working frequency bands, the multi-frequency array antenna provided in the embodiment can have multiple working frequency bands, the antenna elements with different working frequency bands are arranged at intervals, and the groove is arranged between the adjacent first antenna element and the second antenna element, so as to reduce the interference between the antenna elements with different frequency bands, and provide a multi-frequency array antenna with strong anti-interference performance.

[0034] The third antenna unit can include two or more third antenna units of different operating frequency bands in the multi-band combined antenna 3, and the third antenna unit can include three third antenna units in the multi-band combined antenna 3. Figs. 1-3 The third antenna unit can include two or more third antenna units of different operating frequency bands in the multi-band combined antenna 3, and the third antenna unit can include three third antenna units in the multi-band combined antenna 3.

[0035] The multi-band array antenna provided in the embodiments of the present application can be applied to any scene requiring multiple operating frequency bands, and in the present application, the multi-band array antenna is applied to a satellite positioning system. In order to improve the positioning accuracy of the satellite positioning system, a satellite positioning system fusion positioning scheme is currently used, that is, satellite positioning signals of multiple satellite positioning systems are received at the same time, and the multiple satellite positioning signals are processed at the receiving end to obtain more accurate positioning results. Since the operating frequency bands of different satellite positioning systems are different, an antenna array composed of multiple antenna units of different frequency bands is required to maintain the ground receiving antenna of the satellite positioning system. In the embodiments of the present application, the first antenna unit 1 is a B3 frequency band antenna unit of the Beidou navigation system, the operating frequency band of the second antenna unit 2 is an S frequency band of the Beidou navigation system, and the operating frequency bands of the three third antenna units are B2 and B3 frequency bands of the Beidou navigation system, an S frequency band of the Beidou navigation system, and B1 and L frequency bands of the Beidou navigation system, respectively. Among them, the center frequency of the B2 frequency band of the Beidou navigation system is 1207.14 MHz, and the center frequency of the B3 frequency band is 1268.52 MHz. It can be seen that the B2 and B3 frequency bands of the Beidou navigation system are relatively close, so one third antenna unit 1 can be used as the antenna for the above two frequency bands. The center frequency of the S frequency band of the Beidou navigation system is 2491.75 MHz. The center frequency of the B1 frequency band of the Beidou navigation system is 1561.098-1575.42 MHz (the center frequency of the second stage B1 frequency band of the Beidou navigation system is 1561.098 MHz, and the center frequency of the third stage B1 frequency band of the Beidou navigation system is 1575.42 MHz), and the center frequency of the L frequency band of the Beidou navigation system is 1616 MHz, so one third antenna unit can be used as the antenna for the B1 and L frequency bands of the Beidou navigation system. It can be seen that the use of the multi-band array antenna provided in the embodiments of the present application can completely cover the operating frequency band of the Beidou navigation system, thereby enabling support for the Beidou navigation system.

[0036] In addition, for other satellite positioning systems, such as a GPS system, the working frequency band mainly uses an L1 frequency band (with a center frequency of 1575.42 MHz), an L2 frequency band (with a center frequency of 1227.60 MHz), and an L5 frequency band (with a center frequency of 1176.45 MHz), and therefore the third antenna unit covering the B2 and B3 frequency bands of the Beidou navigation system covers the L2 and L5 frequency bands of the GPS, and the third antenna unit serving the B1 frequency band and the L frequency band of the Beidou navigation system can cover the L1 frequency band of the GPS, and therefore the multi-frequency band array antenna provided in the embodiments of the present application can also receive GPS signals. For example, for a GLONASS system, the working frequency band mainly includes an L1 frequency band (with a center frequency of 1602.0 MHz) and an L2 frequency band (with a center frequency of 1246 MHz), and therefore the third antenna unit serving the B1 frequency band and the L frequency band of the Beidou navigation system can cover the L1 frequency band of the GLONASS, and the third antenna unit covering the B2 and B3 frequency bands of the Beidou navigation system can cover the L2 frequency band of the GLONASS, and therefore the multi-frequency band array antenna provided in the embodiments of the present application can also receive GLONASS signals. That is, the multi-frequency band array antenna provided in the embodiments of the present application can support the fusion positioning of multiple satellite positioning systems, can support the working frequency bands of multiple satellite positioning systems, and because the first antenna array and the second antenna array are composed of four antenna units and the groove is arranged between the two, the interference of the antenna units of different frequency bands can be reduced and the signal receiving capability of the antenna can be improved in a complex electromagnetic interference environment.

[0037] For the three third antenna units, the third antenna unit of the B2 and B3 frequency bands, the third antenna unit of the B1 and L frequency bands, and the third antenna unit of the S frequency band are sequentially arranged upwards from the circular antenna array disc 4, because the working frequency bands of the third antenna unit of the B2 and B3 frequency bands, the third antenna unit of the B1 and L frequency bands, and the third antenna unit of the S frequency band gradually increase, if the three third antenna units use the same dielectric substrate, the sizes of the radiators of the third antenna units sequentially decrease, and the antenna unit with a larger size is arranged below and the antenna unit with a smaller size is arranged above, so that the signal receiving capability of the antenna units can be improved. The number and working frequency bands of the third antenna units in the multi-frequency band array antenna provided in the embodiments of the present application can also be increased or decreased according to requirements.

[0038] Further, for each first antenna unit 1 in the first antenna array, a wideband antenna unit can also be used to cover the B2 and B3 frequency bands of the Beidou navigation system, or a B2 frequency band radiator arranged below and a B3 frequency band radiator arranged above can be used to form a first antenna unit 1. That is, the first antenna unit 1 simultaneously covers two frequency bands.

[0039] For each first antenna unit 1 of the first antenna array, one feeding point can be configured for each first antenna unit 1, each feeding point is provided with a frequency corresponding to the frequency band, a mixing circuit and the like, so that the signals of different frequency bands can be received respectively. When the first antenna unit 1 has two operating frequency bands, a feeding point can be configured for each operating frequency band. When the first antenna unit 1 is composed of two radiators, the radiator of the B2 frequency band is located below, and the radiator of the B3 frequency band is located above, then the two feeding points are located on the metal radiation layer of the B3 frequency band radiator, and the radiator of the B2 frequency band is coupled and fed through the radiator of the B3 frequency band, and the two share one feeding network.

[0040] For the multi-band combined antenna composed of three third antenna units, one feeding point can also be configured for each frequency band to realize the reception of signals of multiple frequency bands, wherein the third antenna units of the B2 and B3 frequency bands can share the same feeding network with the first antenna unit 1.

[0041] Each first antenna unit 1 in the first antenna array, each second antenna unit 2 in the second antenna array and the multi-band combined antenna are fixed on the circular antenna array disc 4 by screws.

[0042] Each first antenna unit, second antenna unit and third antenna unit described above can be made by a printed circuit board (PCB) electroplating process or a PCB copper cladding process, and has low cost. Meanwhile, each antenna unit is mounted on the circular antenna array disc by screws, and the assembly process is simple.

[0043] In an embodiment, the distance between the center of the first antenna unit 1 and the center of the circular antenna array disc 4 is between 100 mm and 130 mm.

[0044] In an embodiment, the distance between the center of the second antenna unit 2 and the center of the circular antenna array disc 4 is between 55 mm and 70 mm.

[0045] The positioning device can be any device that needs to use satellite positioning. The multi-band array antenna is used to receive satellite positioning signals of multiple frequency bands, the radio frequency processing unit is used to process the received satellite positioning signals of multiple frequency bands into multiple baseband signals, and the baseband processing unit is used to obtain a composite positioning result based on the multiple baseband signals. In some satellite positioning systems, the positioning device can also send signals to satellites, so the baseband processing unit can also process signals that need to be sent to satellites, and the processed baseband signals are converted by the radio frequency processing unit and then sent to corresponding satellites through the multi-band array antenna.

[0046] It should be noted that the above only the preferred embodiments of the present application and the application of technical principles. Those skilled in the art will understand that the present application is not limited to the specific embodiments here, those skilled in the art can be made various obvious changes, re-adjustment and replacement without departing from the scope of the present application. Therefore, although the above embodiments of the present application has been described in more detail, but the present application is not limited to the above examples, without departing from the concept of the present application, but also can include more other equivalent embodiments, and the scope of the present application is determined by the appended claims.

Claims

1. A multi-band array antenna, characterized by, The positioning device comprises a baseband processing unit, a radio frequency processing unit and an antenna, wherein the antenna is the multi-band array antenna according to any one of claims 1-9. The first antenna array comprises four first antenna units, which are equidistantly arranged on a first circumference of the circular antenna array panel, and the four first antenna units are of the same size. The second antenna array comprises four second antenna units, which are equidistantly arranged on a second circumference of the circular antenna array panel, and the four second antenna units are of the same size, and the diameter of the second circumference is smaller than that of the first circumference. The multi-band combined antenna comprises at least two third antenna units, which are arranged in the center of the circular antenna array panel in an overlapping manner, and each third antenna unit has a different working frequency band. The working frequency band of the first antenna unit is lower than that of the second antenna unit, and a groove is arranged on the circular antenna array panel between each second antenna unit and the adjacent first antenna unit. The included angle between each second antenna unit and the adjacent two first antenna units is the same.

2. The multi-band array antenna of claim 1, wherein, The groove extends from a corner of each second antenna unit close to the first antenna unit to the edge of the circular antenna array panel.

3. The multi-band array antenna of claim 1, wherein, The groove is formed by cutting part of the circular antenna array panel obliquely from both sides of the groove to the center.

4. The multi-band array antenna of claim 3, wherein, The multi-band combined antenna comprises three third antenna units.

5. The multi-band array antenna of claim 1, wherein, The first antenna unit is a B3 frequency band antenna unit of the Beidou navigation system, the working frequency band of the second antenna unit is an S frequency band of the Beidou navigation system, and the working frequency bands of the three third antenna units are respectively a B2, B3 frequency band of the Beidou navigation system, an S frequency band of the Beidou navigation system and a B1, L frequency band of the Beidou navigation system.

6. The multi-band array antenna of claim 4, wherein, Among the three third antenna units, the third antenna unit of the B2, B3 frequency band, the third antenna unit of the B1, L frequency band and the third antenna unit of the S frequency band are sequentially arranged upward from the circular antenna array panel.

7. The multi-band array antenna of claim 6, wherein, The distance between the center of the first antenna unit and the center of the circular antenna array panel is between 100 mm and 130 mm.

8. The multi-band array antenna according to any one of claims 1 to 7, characterized in that, The distance between the center of the second antenna unit and the center of the circular antenna array panel is between 55 mm and 70 mm.

9. The multi-band array antenna according to any one of claims 1 to 7, characterized in that, The positioning device comprises a baseband processing unit, a radio frequency processing unit and an antenna, wherein the antenna is the multi-band array antenna according to any one of claims 1-9.

10. A positioning device, characterized by The multi-band array antenna is used for receiving satellite positioning signals of multiple frequency bands, the radio frequency processing unit is used for processing the received satellite positioning signals of multiple frequency bands into multiple baseband signals, and the baseband processing unit is used for obtaining a combined positioning result based on the multiple baseband signals. ​

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