Ka-band dual-line polarization array antenna

Abstract

The utility model provides a Ka frequency band dual-line polarization array antenna, which is provided with an antenna unit, the antenna unit is provided with a radiation cavity layer and a grid net layer, the radiation cavity layer is provided with a horn antenna, the horn antenna is provided with a radiation cavity, a polarization port and a radiation port, the polarization port and the radiation port are communicated with the radiation cavity, an expansion part is arranged in the radiation cavity, and the grid net layer is provided with a grid net layer. The aperture of the expansion part is gradually increased from inside to outside, and the radiation opening is formed in the outer end of the expansion part; the grid net layer is provided with a grid net, and the grid net is arranged on the outer side of the radiation opening; an expansion part is arranged in the radiation cavity, and the aperture of the expansion part is gradually increased from inside to outside, so that the waveguide can be matched with a free space, the reflection coefficient in the waveguide is reduced, the reflected energy loss is small, and most of energy transmitted in the waveguide is radiated out through the radiation cavity; and the grid net is arranged on the outer side of the radiation opening and divides the radiation opening into a plurality of parts, so that uniform distribution of signal energy is ensured, and the structure of the radiation cavity layer is simplified.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of antennas for communication systems, and more particularly to a Ka-band dual linear polarization array antenna. BACKGROUND

[0002] An antenna is a transducer that transforms guided waves propagating on a transmission line into electromagnetic waves propagating in an unbounded medium (usually free space), or vice versa. In radio devices, it is a component used to emit or receive electromagnetic waves.

[0003] Radio communication, broadcasting, television, radar, navigation, electronic countermeasures, remote sensing, radio astronomy, and other engineering systems that use electromagnetic waves to transmit information rely on antennas to work. In addition, in terms of energy transmission using electromagnetic waves, non-signal energy radiation also requires antennas. Generally, antennas have reversibility, that is, the same antenna can be used as a transmitting antenna and a receiving antenna. The basic characteristic parameters of the same antenna as a transmitter or receiver are the same. This is the reciprocity theorem of antennas.

[0004] For antenna systems receiving satellite live communication, they are generally installed on aircraft or the top of a car, so these antenna systems have good mobility, and thus the requirements for these antennas are relatively high.

[0005] The existing Ka-band dual linear polarization array antenna mainly has the following disadvantages: the reflection coefficient in the waveguide is large, the reflected energy loss is large, and the transmission performance is unstable; the internal space utilization rate of the antenna is not high, and it cannot meet the miniaturization requirement; the weight of the antenna is large, and it cannot meet the light weight requirement. SUMMARY

[0006] The utility model aims at making up for the insufficient of prior art, provides a Ka-band dual linear polarization array antenna that high standing wave array efficiency, bandwidth is wider, miniaturization, the technical scheme that the application adopts is:

[0007] A Ka-band dual linear polarization array antenna is provided, which comprises an antenna unit, a radiation cavity layer and a grid net layer, characterized in that: the radiation cavity layer is provided with a horn antenna, the horn antenna is provided with a radiation cavity, a polarization port and a radiation port, the polarization port and the radiation port are in communication with the radiation cavity, an expansion part is arranged in the radiation cavity, the aperture of the expansion part gradually increases from inside to outside, and the radiation port is arranged at the outer end of the expansion part; the grid net layer is provided with a grid net, and the grid net is arranged outside the radiation port.

[0008] Optionally, the antenna unit is further provided with a power divider, the power divider is provided with a first output port and a second output port; the polarization port is provided with a horizontal polarization port and a vertical polarization port, and the horizontal polarization port and the vertical polarization port are arranged on the side of the horn antenna; the first output port and the second output port are in communication with the horizontal polarization port and the vertical polarization port respectively.

[0009] Optionally, the power divider is further provided with a first adjusting part and a second adjusting part, the first adjusting part is used for adjusting the power ratio of the first output port, and the second adjusting part is used for adjusting the power ratio of the second output port.

[0010] Optionally, the power divider is an E-T power divider, the first adjusting part and the first output port are arranged on one side, the second adjusting part and the second output port are arranged on one side, and the input port of the power divider is arranged between the first adjusting part and the second adjusting part.

[0011] Optionally, the antenna unit is further provided with a base layer and a network layer, and the base layer, the network layer, the radiation cavity layer and the grid network layer are sequentially stacked from bottom to top.

[0012] Optionally, the base layer, the network layer, the radiation cavity layer and the grid network layer have the same edge profile and are in the shape of a cuboid.

[0013] Optionally, the antenna unit is provided with a plurality of antenna units and is arranged in a matrix.

[0014] Optionally, the antenna unit is arranged in a 12*24 unit array.

[0015] Optionally, the grid network is in the shape of a checkered pattern.

[0016] The advantages of the utility model are as follows:

[0017] The radiation cavity is provided with an expansion part, the caliber of the expansion part gradually increases from inside to outside, the waveguide can be matched with free space, the reflection coefficient in the waveguide is reduced, the reflected energy loss is small, and most of the energy transmitted in the waveguide is radiated out by the radiation cavity; the grid network is arranged on the outside of the radiation port, the radiation port is divided into a plurality of parts by the grid network, the uniform distribution of signal energy is ensured, and the structure of the radiation cavity layer is simplified. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0019] Figure 1 It is a schematic view of the antenna unit.

[0020] Figure 2This is a schematic diagram of the internal structure of the antenna unit;

[0021] Figure 3 This is a schematic diagram of a horn antenna;

[0022] Figure 4 This is a schematic diagram of a power divider;

[0023] Figure 5 This is a schematic diagram of a Ka-band dual-linear polarized array antenna;

[0024] Figure 6 This is a schematic diagram of the radiation cavity layer;

[0025] Figure 7 This is a schematic diagram of the network layers;

[0026] Figure 8 This is a schematic diagram of the basic level.

[0027] Explanation of symbols in the diagram:

[0028] 1 is the radiating cavity layer, 11 is the horn antenna, 111 is the radiating cavity, 1111 is the extension section, 112 is the polarization port, 1121 is the horizontal polarization port, 1122 is the vertical polarization port, and 113 is the radiating port.

[0029] 2 is the grid layer, and 21 is the grid.

[0030] 3 is the network layer, 31 is the power divider, 311 is the first output port, 312 is the second output port, 313 is the first adjustment unit, 314 is the second adjustment unit, and 315 is the input port;

[0031] 4 represents the basic level, and 41 represents the weight reduction structure. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0033] The Ka-band dual-polarized array antenna provided in the embodiments of this application will now be described. The Ka-band dual-polarized array antenna is as follows: Figures 1 to 8 As shown:

[0034] The application discloses a Ka-band dual linear polarization array antenna which is provided with an antenna unit, the antenna unit is provided with a radiation cavity layer 1 and a grid net layer 2, the radiation cavity layer 1 is provided with a horn antenna 11, the horn antenna 11 is provided with a radiation cavity 111, a polarization port 112 and a radiation port 113, the polarization port 112 and the radiation port 113 are communicated with the radiation cavity 111, the radiation cavity 111 is provided with an expansion part 1111, the aperture of the expansion part 1111 gradually increases from inside to outside, and the radiation port 113 is arranged at the outer end of the expansion part 1111; the grid net layer 2 is provided with a grid net 21, and the grid net 21 is arranged at the outer side of the radiation port 113.

[0035] The expansion part 1111 is arranged in the radiation cavity 111, the aperture of the expansion part 1111 gradually increases from inside to outside, the waveguide can be matched with the free space, the reflection coefficient in the waveguide is reduced, the reflected energy loss is small, and most of the energy transmitted in the waveguide is radiated out by the radiation cavity 111; the grid net 21 is arranged at the outer side of the radiation port 113, the grid net 21 divides the radiation port 113 into multiple parts, and the uniform distribution of signal energy is ensured, and the structure of the radiation cavity layer 1 is simplified.

[0036] In the embodiment, the grid net 21 is in the shape of a checkered pattern, and the radiation port 113 can be evenly divided into four parts.

[0037] The antenna unit is further provided with a power divider 31, the power divider 31 is provided with a first output port 311 and a second output port 312; the polarization port 112 is provided with a horizontal polarization port 1121 and a vertical polarization port 1122, and the horizontal polarization port 1121 and the vertical polarization port 1122 are arranged on the side surface of the horn antenna 11; the first output port 311 and the second output port 312 are communicated with the horizontal polarization port 1121 and the vertical polarization port 1122 respectively.

[0038] The power divider 31 divides the input signal into two paths according to the requirement, one path is transmitted to the first output port 311, and the other path is transmitted to the second output port 312.

[0039] The power divider 31 is further provided with a first adjusting part 313 and a second adjusting part 314, the first adjusting part 313 is used for adjusting the power ratio of the output of the first output port 311, and the second adjusting part 314 is used for adjusting the power ratio of the output of the second output port 312.

[0040] In the embodiment, the power divider 31 adopts an E-T power divider, the first adjusting part 313 and the first output port 311 are arranged on one side, the second adjusting part 314 and the second output port 312 are arranged on the other side, and the input port 315 of the power divider 31 is arranged between the first adjusting part 313 and the second adjusting part 314.

[0041] The antenna unit is further provided with a base layer 4 and a network layer 3, and the base layer 4, the network layer 3, the radiation cavity layer 1 and the grid network layer 2 are stacked from bottom to top. The space utilization in the antenna can be improved, and the antenna can be miniaturized.

[0042] In the embodiment, the antenna unit is provided with a plurality of matrix distribution, and the antenna unit adopts a 12*24 unit array distribution, so that the compact structure of the antenna is ensured, the miniaturization of the antenna is realized, and the standing wave array efficiency is high.

[0043] The base layer 4 is provided with a combined feeder interface and a differential feeder interface, and the input port 315 of the power divider 31 is communicated with the base layer 4 through a feeder, so that the signal transmission effect between the power divider 31 and the base layer 4 can be ensured; the base layer 4 is further provided with a weight reduction structure 41, so that the weight of the antenna can be reduced.

[0044] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A Ka-band dual linear polarization array antenna, which is provided with antenna units, the antenna units are provided with a radiation cavity layer and a grid network layer, characterized in that: The radiation cavity layer is provided with a horn antenna, the horn antenna is provided with a radiation cavity, a polarization port and a radiation port, the polarization port and the radiation port are in communication with the radiation cavity, the radiation cavity is provided with an expansion part, the aperture of the expansion part gradually increases from inside to outside, and the radiation port is arranged at the outer end of the expansion part; and the grid net layer is provided with a grid net arranged outside the radiation port.

2. The Ka-band dual linear polarization array antenna of claim 1, wherein: The antenna unit is further provided with a power divider, the power divider is provided with a first output port and a second output port, the polarization port is provided with a horizontal polarization port and a vertical polarization port, the horizontal polarization port and the vertical polarization port are arranged on the side surface of the horn antenna, and the first output port and the second output port are in communication with the horizontal polarization port and the vertical polarization port respectively.

3. The Ka-band dual linear polarization array antenna of claim 2, wherein: The power divider is further provided with a first adjusting part and a second adjusting part, the first adjusting part is used for adjusting the power ratio of the first output port, and the second adjusting part is used for adjusting the power ratio of the second output port.

4. The Ka-band dual linear polarization array antenna of claim 3, wherein: The power divider adopts an E-T power divider, the first adjusting part and the first output port are arranged on one side, the second adjusting part and the second output port are arranged on the other side, and the input port of the power divider is arranged between the first adjusting part and the second adjusting part.

5. The Ka-band dual linear polarization array antenna according to any one of claims 1 to 4, characterized in that: The antenna unit is further provided with a base layer and a network layer, the base layer, the network layer, the radiation cavity layer and the grid net layer are sequentially stacked from bottom to top.

6. The Ka-band dual linear polarization array antenna of claim 5, wherein: The base layer, the network layer, the radiation cavity layer and the grid net layer have the same edge profile and are in the shape of a cuboid.

7. The Ka-band dual linear polarization array antenna of claim 6, wherein: The antenna unit is provided with a plurality of units and is in a matrix distribution.

8. The Ka-band dual linear polarization array antenna of claim 7, wherein: The antenna unit adopts a 12*24 unit array distribution.

9. The Ka-band dual linear polarization array antenna according to any one of claims 1 to 4, characterized in that: The grid net is in the shape of a cross-shaped grid.

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