An 8x8 tile type satellite communication phased array antenna subarray capable of arbitrary two-dimensional expansion

Abstract

The application relates to the field of satellite communication phased array antennas, and discloses an 8*8 tile type satellite communication phased array antenna subarray capable of being expanded in two dimensions, which comprises a first antenna layer, the first antenna layer is composed of 8*8 antenna units, the interval between two adjacent antenna units is half of the wavelength corresponding to the working center frequency of the antenna subarray, and the length and width dimensions of the antenna subarray are four times of the wavelength corresponding to the working center frequency of the antenna subarray. Compared with the 1024 antenna unit antenna subarray which can only support 2*N expansion, the antenna subarray in the application can support N*N mode two-dimensional expansion.

Description

TECHNICAL FIELD

[0001] The application relates to the field of satellite communication phased array antennas, in particular to an 8*8 tile type satellite communication phased array antenna subarray capable of being expanded in two dimensions. BACKGROUND

[0002] The tile type phased array antenna is integrated with an antenna, a TR assembly, a distribution / synthesis network, a control power supply circuit and a beam forming chip on a multi-layer PCB to form a phased array antenna system with certain functions. The tile type phased array antenna is paid attention to by a satellite communication system due to the advantages of low profile, high integration and low cost, and is applied to a millimeter wave broadband satellite communication system.

[0003] In order to obtain a high communication rate, the size of an antenna array surface selected for satellite communication is generally 4096 antenna units. The size of the 4096 (64*64) antenna units in the receiving frequency band (K frequency band) is about 480mm*480mm, that is, the size of the whole PCB required is 480mm*480mm. However, due to the multiple layers of the tile type phased array antenna, the complex circuit, the high one-time processing cost, the great difficulty, the low qualified rate and the poor generality of the whole PCB, the whole PCB can only be customized for special products. In order to solve the problems of the processing and generality of the whole PCB, a common method at present is to divide the phased array antenna, divide the phased array antenna into a phased array antenna subarray according to 1024 (32*32) antenna units, and then splice the phased array antenna subarrays to form a larger antenna array surface.

[0004] The traditional phased array antenna subarray generally contains 1024 (32*32) antenna units. The total power consumption of the phased array antenna subarray beam forming chip under this scale is about 50W, and the corresponding input current requirement under the voltage of 1.8V is about 28A. Meanwhile, the number of phased array antenna subarray beam chips under this scale is 256 (dual polarization), and the total control line requirement is about 96. In order to solve the problems of large power supply current and many control lines of the phased array antenna subarray, the power supply circuit and the control circuit need to be integrated on the edge of the phased array antenna subarray. At this time, the phased array antenna subarray is no longer a complete square, but a rectangle with a part of the power supply circuit and the control circuit protruding on one side. At this time, the phased array antenna subarray can only be expanded in the mode of 2*N, and generally the maximum expansion is 2*2, and the phased array antenna subarray cannot be expanded in two dimensions, and the generality is poor.

[0005] The antenna subarray in the prior art can only combine a rectangular array when multiple extensions are used individually, and cannot combine a corner missing array (structure weighting), the antenna subarray in the scheme has a small scale, and a corner missing array can be combined to obtain better indexes; meanwhile, the traditional phased array antenna subarray has a scale of 1024 (32*32) antenna units, when a user needs a higher instantaneous bandwidth, the 1024 antennas can only be used as the minimum unit for delay, the improvement of the instantaneous bandwidth is limited, and a higher instantaneous bandwidth cannot be obtained. SUMMARY

[0006] The application provides an 8*8 tile type satellite communication phased array antenna subarray which can be extended in two dimensions, and solves the problems of large antenna subarray scale, poor extension performance, inability to perform structure weighting, and inability to obtain a higher instantaneous bandwidth in the prior art.

[0007] The application is achieved by the following technical scheme:

[0008] An 8*8 tile type satellite communication phased array antenna subarray which can be extended in two dimensions comprises a first antenna layer, the first antenna layer is composed of 8*8 antenna units, the spacing between two adjacent antenna units is half of the wavelength corresponding to the center frequency of the antenna subarray, and the length and width of the antenna subarray are four times the wavelength corresponding to the center frequency of the antenna subarray.

[0009] As optimization, the first antenna layer is the bottom layer, and from top to bottom, the chip layer, the first dielectric layer, the first control layer, the second dielectric layer, the second control layer, the third dielectric layer, the first power supply layer, the fourth dielectric layer, the second power supply layer, the fifth dielectric layer, the feed line layer, the sixth dielectric layer, the coupling gap layer, the seventh dielectric layer, the second antenna layer and the eighth dielectric layer are sequentially arranged.

[0010] As optimization, the chip layer is provided with a beam chip, a power supply control connector, a radio frequency connector, a resistor capacitor, a transmission line, a surface network and an antenna feed point, the radio frequency connector is connected with the beam chip through the surface network, the beam chip is connected with the antenna feed point through the transmission line, the antenna feed point is connected with the antenna unit of the first antenna layer through the feed line layer, and the power supply supplies power for the radio frequency connector through the power supply control connector.

[0011] As optimization, one chip layer is provided with eight beam chips.

[0012] As optimization, each beam chip is connected with eight transmission lines.

[0013] As optimization, each transmission line is connected with one antenna feed point.

[0014] As optimization, 64 feed lines are arranged in the feed line layer, and one antenna feed point is connected with one antenna unit through one feed line.

[0015] As optimization, the interval of the antenna units between different antenna subarrays is half of the wavelength corresponding to the working center frequency after the two-dimensional expansion of the antenna subarrays.

[0016] As optimization, each beam chip is respectively provided with a pair of capacitors.

[0017] As optimization, the impedance of the transmission line is 50 ohms.

[0018] Compared with the prior art, the application has the following advantages and beneficial effects:

[0019] 1. Compared with the 1024 antenna unit antenna subarray, the size of the antenna subarray in the application is small, and the production and processing cost is reduced by about 50%.

[0020] 2. Compared with the 1024 antenna unit antenna subarray which only supports 2xN expansion, the antenna subarray in the application can support NxN two-dimensional expansion.

[0021] 3. Compared with the 1024 antenna unit antenna subarray rectangular array arrangement, the antenna subarray in the application can support the corner missing array expansion.

[0022] 4. Compared with the 1024 antenna unit antenna subarray which is only suitable for high-speed communication, the antenna subarray in the application has a wider use scenario and can support wideband Internet of Things, wideband low-speed communication and wideband high-speed communication. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the exemplary embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0024] Figure 1 It is a structure diagram of the first antenna layer of an 8x8 tile type satellite communication phased array antenna subarray which can be two-dimensionally expanded arbitrarily according to the application;

[0025] Figure 2 It is a structure diagram of a 2x2 two-dimensionally expanded antenna subarray;

[0026] Figure 3 It is an exploded view of an 8x8 tile type satellite communication phased array antenna subarray which can be two-dimensionally expanded arbitrarily according to the application;

[0027] Figure 4 This is a schematic diagram of the chip layer structure of an 8×8 tiled satellite communication phased array antenna subarray that can be arbitrarily expanded in two dimensions according to the present invention.

[0028] The attached diagram shows the markings and corresponding component names:

[0029] 1-Beam chip, 2-Power supply control connector, 3-RF connector, 4-Capacitor, 501-Transmission line, 502-Surface mount network, 503-Antenna feed point, 6-First dielectric layer, 7-First control layer, 8-Second dielectric layer, 9-Second control layer, 10-Third dielectric layer, 11-First power layer, 12-Fourth dielectric layer, 13-Second power layer, 14-Fifth dielectric layer, 15-Feeder layer, 16-Sixth dielectric layer, 17-Coupling slot layer, 18-Seventh dielectric layer, 19-Second antenna layer, 20-Eighth dielectric layer, 21-First antenna layer. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0031] Example 1

[0032] like Figures 1-4 As shown, this invention discloses an arbitrarily expandable 8×8 tile-type phased array antenna subarray for satellite communication, comprising a chip layer, on which are arranged eight beamforming chips 1, a power supply and control connector 2, an RF connector 3, a capacitor 4, a 50-ohm surface-mount transmission line 501 with an impedance of 50 ohms, a surface network 502, an antenna feed point 503, a first dielectric layer 6, a first control layer 7, a second dielectric layer 8, a second control layer 9, a third dielectric layer 10, a first power layer 11, a fourth dielectric layer 12, a second power layer 13, a fifth dielectric layer 14, a feed line layer 15, a sixth dielectric layer 16, a coupling slot layer 17, a seventh dielectric layer 18, a second antenna layer 19, an eighth dielectric layer 20, and a first antenna layer 21. Since the first and second antenna layers are double-layer patch structures, the antenna element arrangement in the second antenna layer is consistent with that in the first antenna layer.

[0033] The capacitor's function in the circuit is to filter out noise and harmonics in the power supply signal. Specifically, the RF connector is connected to eight beamforming chips via the surface mount network. Each beamforming chip is connected to an antenna feed point via eight transmission lines. The 64 antenna feed points are connected to 64 antenna elements 21a of the first antenna layer via 64 feed lines in the feed line layer. Power is supplied to the RF connection via the power supply control connector.

[0034] When the radio frequency connector 3 is used as a transmitting input (transmitting subarray), the radio frequency signal is input by the radio frequency connector 3, divided into 8 paths by the surface network 502, and input into 8 beam chips 1, each of which divides the signal into 8 paths, and outputs through 64 surface 50-ohm transmission lines 501, and then transmitted to 64 feed lines in the feed line layer 15 through corresponding antenna feed points 503 (64), and finally radiated to the free space by the first antenna layer 21 (64 antennas).

[0035] When the radio frequency connector 3 is used as a receiving output (receiving subarray), the radio frequency signal in the free space is received by the first antenna layer 21 (64 antenna units 21a), transmitted to the corresponding antenna feed points 503 (64) through the 64 feed lines in the feed line layer 15, input into the corresponding beam chips 1 through the 64 surface 50-ohm transmission lines 501, and then output by the radio frequency connector 3.

[0036] The first antenna layer 21 is composed of 64 antenna units 21a, and the distance between adjacent antenna units 21a is half of the wavelength corresponding to the center frequency of the antenna subarray, i.e. λ / 2, and the length and width of the antenna subarray are four times the wavelength corresponding to the center frequency, i.e. 4λ. After two-dimensional expansion of the antenna subarray, the distance between the antenna units 21a of different antenna subarrays is half of the wavelength corresponding to the center frequency, i.e. λ / 2. Since the distance between the antenna units is λ / 2 and the length and width of the antenna subarray are 4λ, the antenna subarray can be expanded in N×N mode in two dimensions, and after two-dimensional expansion of the antenna subarray, the distance between the antenna units 21a of different antenna subarrays is half of the wavelength corresponding to the center frequency, i.e. λ / 2.

[0037] Since the distance between the antenna units is λ / 2 and the length and width of the antenna subarray are 4λ, the antenna subarray of the present application can support the expansion of the corner-truncated array, and the antenna subarray of the present application can support the delay of 8×8 antenna units 21a as the smallest unit.

[0038] The above specific embodiments further illustrate the purpose, technical solutions and advantages of the present application, and it should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An 8×8 tiled phased array antenna subarray for satellite communication that can be arbitrarily expanded in two dimensions, characterized in that, The first antenna layer is composed of 8*8 antenna units, the interval between two adjacent antenna units is half of the wavelength corresponding to the center frequency of the antenna subarray, and the length and width of the antenna subarray are four times of the wavelength corresponding to the center frequency of the antenna subarray. The first antenna layer is the bottom layer, and from top to bottom, it further includes a chip layer, a first dielectric layer, a first control layer, a second dielectric layer, a second control layer, a third dielectric layer, a first power supply layer, a fourth dielectric layer, a second power supply layer, a fifth dielectric layer, a feed line layer, a sixth dielectric layer, a coupling slot layer, a seventh dielectric layer, a second antenna layer and an eighth dielectric layer.

2. An 8 x 8 tile type phased array antenna subarray according to claim 1, wherein, The chip layer is provided with a beam chip, a power supply control connector, a radio frequency connector, a capacitor, a transmission line, a surface network and an antenna feed point, the radio frequency connector is connected with the beam chip through the surface network, the beam chip point is connected with the antenna feed point through the transmission line, the antenna feed point is connected with the antenna unit of the first antenna layer through the feed line layer, and the power supply supplies power for the radio frequency connection through the power supply control connector.

3. An 8 x 8 tile type steerable array antenna subarray according to claim 2, wherein, One of the chip layers is provided with 8 beam chips.

4. An 8 x 8 tile type phased array antenna subarray of claim 3, wherein, Each of the beam chips is connected with 8 transmission lines.

5. An 8 x 8 tileable 2D scalable satellite TV phased array antenna subarray according to claim 4, characterized in that, Each of the transmission lines is connected with one antenna feed point.

6. An arbitrarily two-dimensionally scalable 8 x 8 tile type satellite television phased array antenna subarray according to claim 5, characterized in that, The feed line layer is provided with 64 feed lines, and one antenna feed point is connected with one antenna unit through one feed line.

7. An 8 x 8 tile type phased array antenna subarray of claim 1, wherein, After two-dimensional expansion of the antenna subarray, the interval between the antenna units of different antenna subarrays is half of the wavelength corresponding to the center frequency.

8. An 8 x 8 tile type phased array antenna subarray of claim 2, wherein, Each of the beam chips is respectively provided with a pair of capacitors.

9. An 8 x 8 tile type phased array antenna subarray of claim 2, wherein, The impedance of the transmission line is 50 ohms.

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