Rhombic grid sheet type phased array antenna

Abstract

The invention discloses a rhombic grid sheet type phased-array antenna, and belongs to the technical field of phased-array antennas. The antenna is installed on an antenna platform carrier and comprises at least four antenna radiation units, the distances of connecting lines of center points of the adjacent antenna radiation units are the same, and the connecting lines of the center points of the four antenna radiation units form a rhombic array. The inner angle of the rhombic array comprises a first included angle alpha and a second included angle beta, and the difference value between the structure appearance angle of the movement orientation of the antenna platform carrier and the first included angle alpha is a preset angle, so that the radar scattering wave peak value direction of the rhombic grid sheet type phased-array antenna is consistent with the radar scattering wave peak value direction of the antenna platform carrier; and the scattering peak of the rhombic grid sheet type phased-array antenna is hidden below the scattering peak of the antenna platform carrier. The direction of a radar scattering wave peak value caused by the phased-array antenna is consistent with that of a platform radar scattering peak value, so that the radar scattering wave peak value is hidden below a platform high-energy scattering peak, and the low detectable performance is not damaged and influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of phased array antennas, and in particular to a diamond grid piece type phased array antenna. Background Art

[0002] With the rapid construction of high- and low-orbit high-throughput satellite network constellations at home and abroad, the demand for electronically scanned phased array antennas mounted on various platforms such as vehicles, aircraft, and ships is becoming increasingly strong. At the same time, these platforms also have low detectability requirements. Naturally, the phased array satellite communication antennas carried on them also need to achieve low detectability. In addition to traditional low-detectability technical processing methods, such as coating of absorbing materials, adding frequency-selective surface antenna covers, etc., the phased array antennas installed on the above platforms also need to achieve the lowest possible profile height so that they can be installed conformally with the platform to reduce the energy level of radar scattering. However, in order to further reduce the radar scattering energy level, the structural scattering peak of the radar transmission wave must be further reduced, and the active phased array antenna units are usually made of metal materials, and the units themselves and the array composed of units will produce certain structural scattering sources. Summary of the invention

[0003] The object of the present invention is to overcome the deficiencies of the prior art and provide a diamond grid-type phased array antenna.

[0004] The objective of the present invention is achieved through the following technical scheme: a diamond grid piece phased array antenna, installed on an antenna platform carrier, including at least four antenna radiating units, the center point connection distance of adjacent antenna radiating units is the same, the center point connection line of the four antenna radiating units forms a diamond array, the inner angle of the diamond array includes a first angle α and a second angle β, the first angle α and the second angle β are not equal, the difference between the structural outer angle of the moving direction of the antenna platform carrier and the first angle α is a preset angle, so that the radar scattering wave peak direction of the diamond grid piece phased array antenna is consistent with the radar scattering wave peak direction of the antenna platform carrier, and the scattering peak of the diamond grid piece phased array antenna is hidden under the scattering peak of the antenna platform carrier.

[0005] Preferably, the first angle α+the second angle β=180°.

[0006] Preferably, the antenna platform carrier is an airplane, a car or a ship.

[0007] Preferably, the preset angle is 0°.

[0008] The beneficial effects of the present invention are: 1) After the phased array antenna is installed on an airborne, vehicle-mounted or other platform, the peak direction of the radar scattering wave caused by the phased array antenna is consistent with the platform's radar scattering peak, which makes it hidden under the platform's high-energy scattering peak, and the low detectability performance will not be affected by damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of a diamond grid-type phased array antenna; In the figure, 1-antenna radiation unit. DETAILED DESCRIPTION

[0010] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0011] In order to solve the low detectability engineering technology problem of satellite communication phased array under low-cost flat-panel architecture, the present invention proposes a diamond grid sheet phased array antenna, which can ensure that the low detectability performance of the platform will not be damaged after the phased array antenna is installed on airborne, vehicle-mounted and other platforms. See also Figure 1 The present invention provides a technical solution: a diamond grid piece phased array antenna, which is installed on an antenna platform carrier, and includes at least four antenna radiating units 1. The center point connection distances of adjacent antenna radiating units 1 are the same, and the center point connection lines of the four antenna radiating units 1 form a diamond array. The inner angle of the diamond array includes a first angle α and a second angle β. The first angle α and the second angle β are not equal. The difference between the structural outer angle of the moving direction of the antenna platform carrier and the first angle α is a preset angle, so that the radar scattering wave peak direction of the diamond grid piece phased array antenna is consistent with the radar scattering wave peak direction of the antenna platform carrier, and the scattering peak of the diamond grid piece phased array antenna is hidden under the scattering peak of the antenna platform carrier.

[0012] In this embodiment, the first angle α and the second angle β are not equal, that is, not 90°, and the diamond array is not a square. Figure 1As shown, the distance between the center lines of adjacent antenna radiation units 1 in the diamond grid chip phased array antenna is consistent, and the center lines of four adjacent antenna radiation units 1 form a diamond, where the diamond angle α+β=180°. By generalizing the four adjacent antenna unit array rule, a larger-scale phased array antenna array can be obtained, and the array outer envelope composed of the antenna radiation units 1 also presents a diamond envelope with the same α, β angles. In such a diamond grid array layout, the α angle of the entire array can be optimized by appropriate adjustment (actually, the β angle is also adjusted accordingly), usually making the α angle consistent with the angle of the envelope of the metal structure of the platform carrier such as an airplane, a car, or a ship, especially making the α angle consistent with or close to the structural shape angle of the movement direction of the above-mentioned platform, in order to make the peak direction of the radar scattering wave caused by the phased array antenna consistent with the platform radar scattering peak, so that it is hidden under the high-energy scattering peak of the platform, and will not affect the overall radar scattering level of the platform. Because when the platform itself is irradiated by radar electromagnetic waves, it will naturally produce certain radar electromagnetic wave scattering peaks, and its energy is usually much higher than the radar scattering peaks produced by the phased array on the platform, usually more than an order of magnitude higher. It can be understood that the radar scattering signal of the phased array is submerged under the radar scattering signal in the same direction of the platform, so it has no effect on the overall radar low detectability of the platform.

[0013] In some embodiments, the first angle α+the second angle β=180°.

[0014] In this embodiment, the first angle α+the second angle β=180°, that is, the first angle α and the second angle β are two adjacent inner angles of the rhombus array.

[0015] In some embodiments, the antenna platform carrier is an airplane, a car, or a ship.

[0016] In some embodiments, the preset angle is 0°.

[0017] In this embodiment, the preset angle is 0°, that is, the structural outer angle of the moving direction of the antenna platform carrier is the same as the first angle α.

[0018] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A diamond grid-type phased array antenna, mounted on an antenna platform carrier, characterized in that: The invention comprises at least four antenna radiating units, the center points of adjacent antenna radiating units are connected at the same distance, the center points of the four antenna radiating units form a diamond array, the inner angle of the diamond array comprises a first angle α and a second angle β, the first angle α and the second angle β are not equal, the difference between the structural outer angle of the moving direction of the antenna platform carrier and the first angle α is a preset angle, so that the peak direction of the radar scattering wave of the diamond grid plate phased array antenna is consistent with the peak direction of the radar scattering wave of the antenna platform carrier, and the scattering peak of the diamond grid plate phased array antenna is hidden under the scattering peak of the antenna platform carrier.

2. The diamond grid phased array antenna according to claim 1, characterized in that: The first angle α+the second angle β=180°.

3. The diamond grid phased array antenna according to claim 1, characterized in that: The antenna platform carrier is an airplane, a car or a ship.

4. The diamond grid phased array antenna according to claim 1, characterized in that: The preset angle is 0°.

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