KU frequency band dual circularly polarized packaging phased array antenna

Abstract

The invention provides a KU-band dual-circularly-polarized packaged phased-array antenna, which comprises n antenna units, and n is a positive integer greater than or equal to 2. The antenna unit comprises a first dielectric plate, a second dielectric plate, a third dielectric plate, a fourth dielectric plate, a first metal radiation patch connected to the upper surface of the first dielectric plate, a second metal radiation patch connected to the upper surface of the second dielectric plate, and a metal ground connected to the upper surface of the third dielectric plate, the metal isolation strip is connected to the edge of the upper surface of the first dielectric plate; and the metal bridge is connected to the upper surface of the fourth dielectric plate. The antenna unit is designed into a double-feed double-circular-polarization form by using a multi-layer patch form, and the use of a radio frequency connector and a radio frequency cable is reduced through a packaging technology, so that the problems of loss and overlarge difference of radio frequency signals are solved, and the scanning characteristic of the whole array is improved; in order to realize the wide scanning angle characteristic of the array, the antenna needs to be miniaturized, and the unit spacing of array elements is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and particularly to a KU-band dual circularly polarized packaged phased array antenna. Background Art

[0002] With the continuous development of phased array technology, the demand for phased array antennas in the communication field is getting higher and higher, among which low profile, multi-polarization and large scanning angle have become the key research directions.

[0003] For traditional active phased array antennas, radio frequency signals are mostly transmitted by means of cable connection. In actual use, the size and loss are large, and it is difficult to control the requirements of equal amplitude and in-phase, which brings great difficulties to the system structure design and the beam pointing of the entire array. The highly integrated integrated packaging technology can enable efficient connection between the antenna and the component part, improve the portability of the entire array system, and greatly reduce the antenna profile height, becoming one of the research directions of phased array antennas.

[0004] In current various communication and broadcast services, there are diverse polarization forms. Adopting dual circular polarization design can more effectively improve the signal reception ability. To expand the spatial coverage range of signal detection, it is necessary to increase the scanning range of the phased array. Since the packaged antenna has a compact structure and a low profile, it is a difficult problem to achieve dual circular polarization and wide scanning angle.

[0005] Therefore, an antenna that can achieve dual circular polarization and wide scanning angle is needed. Summary of the Invention

[0006] The present invention is to solve the problems of dual circular polarization and wide scanning angle, and provides a KU-band dual circularly polarized packaged phased array antenna. The antenna unit is designed in a dual-fed dual circular polarization form using a multi-layer patch form. By using packaging technology, the use of RF connectors and RF cables is reduced, thereby solving the problems of excessive loss and difference of RF signals and improving the scanning characteristics of the entire array. To achieve the wide scanning angle characteristic of the array, it is necessary to miniaturize the antenna and reduce the element spacing of the array elements. The present invention overcomes the disadvantage of excessive port coupling and improves the performance of the phased array antenna. The antenna in the present invention can have expandable characteristics and can be used as a sub-array in different arrays, thereby meeting the requirements of multi-scene, multi-target, and multi-platform equipment.

[0007] The present invention provides a KU-band dual circularly polarized packaged phased array antenna, which includes n antenna elements, where n is a positive integer greater than or equal to 2; the antenna element includes a first dielectric plate, a second dielectric plate, a third dielectric plate, and a fourth dielectric plate arranged in sequence from top to bottom, a first metal radiation patch connected to the upper surface of the first dielectric plate, a second metal radiation patch connected to the upper surface of the second dielectric plate, a metal ground connected to the upper surface of the third dielectric plate, a metal isolation strip connected to the edge of the upper surface of the first dielectric plate, and a metal bridge connected to the upper surface of the fourth dielectric plate;

[0008] Both the first metal radiation patch and the second metal radiation patch are located at the center of the antenna element, forming a double-layer stacked microstrip antenna for dual-linear polarization radiation, and a metal isolation strip surrounds the first metal radiation patch;

[0009] The metal bridge is a strip-line bridge, connected to the second metal radiation patch through a metal via, and used for switching dual-circular polarization;

[0010] The first dielectric plate, the second dielectric plate, the third dielectric plate, and the fourth dielectric plate are all connected by pressing with a semi-solid PP plate.

[0011] In a preferred embodiment of the KU-band dual-circular polarization packaged phased array antenna of the present invention, the size of the first metal radiation patch is smaller than that of the second metal radiation patch;

[0012] The first metal radiation patch is an irregular octagon, and the second metal radiation patch is an equilateral octagon.

[0013] In a preferred embodiment of the KU-band dual-circular polarization packaged phased array antenna of the present invention, the edge lines of the first metal radiation patch are respectively parallel to the edge lines of the second metal radiation patch;

[0014] The long side of the first metal radiation patch is 2.82 mm and the short side is 1.6 mm, and the side lengths of the second metal radiation patch are all 2.82 mm.

[0015] In a preferred embodiment of the KU-band dual-circular polarization packaged phased array antenna of the present invention, the metal bridge is a 90° bridge;

[0016] The metal bridge includes a first input port and a second input port located on both sides, a first branch L1 connected to the first input port, a second branch L2 connected to the second input port, a third branch L3 connected between the first branch L1 and the second branch L2, a main branch connected to the first branch L1, the second branch L2, and the third branch L3, and a first output port and a second output port respectively connected to the output end of the main branch;

[0017] Both the first branch L1 and the second branch L2 are perpendicular to the main branch; the feeding forms of the first input port and the second input port are both coaxial-like feeding;

[0018] The length of the third branch L3 is half of the wavelength and can generate a 90° phase difference.

[0019] In a preferred embodiment of the KU-band dual-circular polarization packaged phased array antenna of the present invention, the coaxial-like structure is composed of 6 metal columns arranged in an equidistant circular pattern and a metal column located at the center point.

[0020] A KU - band dual - circular - polarization packaged phased - array antenna according to the present invention, as a preferred embodiment, further includes a first metal via connecting the fourth dielectric plate to the metal bridge, a second metal via connecting the metal isolation strip to the fourth dielectric plate, a third metal via connecting the second metal radiation patch to the metal bridge, a first back - drill hole that opens upward from the third dielectric plate to the top of the first dielectric plate and is aligned with the first metal via at the center, and a second back - drill hole that penetrates the fourth dielectric plate and is aligned with the center of the third metal via at the center;

[0021] The first metal via introduces polarization feeding to the lower surface of the fourth dielectric plate, and the second metal vias are uniformly arranged on the metal isolation strip and connect the metal isolation strip to the fourth dielectric plate.

[0022] A method for manufacturing a KU - band dual - circular - polarization packaged phased - array antenna according to the present invention, as a preferred embodiment, includes the following steps:

[0023] S1. Connect the first metal radiation patch to the upper surface of the first dielectric plate, connect the second metal radiation patch to the upper surface of the second dielectric plate, connect the metal ground to the upper surface of the third dielectric plate, and connect the metal bridge to the upper surface of the fourth dielectric plate;

[0024] S2. Press - fit the first dielectric plate, the second dielectric plate, and the third dielectric plate through a semi - solid PP plate;

[0025] S3. Drill the third metal via and the first back - drill hole to obtain a first sub - structure;

[0026] S4. Then press - fit the first sub - structure with the fourth dielectric plate;

[0027] S5. Drill the second back - drill hole, the first metal via, and the second metal via, and the manufacturing of the KU - band dual - circular - polarization packaged phased - array antenna is completed.

[0028] A KU - band dual - circular - polarization packaged phased - array antenna according to the present invention, as a preferred embodiment, in step S1, connect n first metal radiation patches to the upper surface of the first dielectric plate, connect n second metal radiation patches to the upper surface of the second dielectric plate, connect n metal grounds to the upper surface of the third dielectric plate, and connect n metal bridges to the upper surface of the fourth dielectric plate.

[0029] A KU - band dual - circular - polarization packaged phased - array antenna according to the present invention, as a preferred embodiment, the KU - band dual - circular - polarization packaged phased - array antenna includes n * n antenna elements, and the KU - band dual - circular - polarization packaged phased - array antenna can also be extended as a sub - array antenna into a large - scale array antenna; when extending, the sub - array antenna is press - fit with the sub - array RF component and then spliced.

[0030] A KU - band dual - circular - polarization packaged phased - array antenna according to the present invention, as a preferred embodiment, the first dielectric plate, the second dielectric plate, and the fourth dielectric plate are all made of low - loss m6 material with a dielectric constant of 3.63. The thickness of the first dielectric plate is 1.5 mm, the thickness of the second dielectric plate is 0.625 mm, and the thickness of the fourth dielectric plate is 0.25 mm;

[0031] The second dielectric plate is a dielectric layer without a cavity;

[0032] The third dielectric plate is made of low - loss m6 material with a dielectric constant of 3.33 and a thickness of 0.25 mm;

[0033] The perpendicular distance between the feeding branch of the metal bridge and the center of the first metal radiation patch is 0.7 mm, and the distance from the center of the feeding branch of the metal bridge to the center of the second output port is 1.72 mm;

[0034] The KU - band dual - circular - polarization packaged phased - array antenna is composed of 4×4 antenna elements.

[0035] The present invention has the following advantages:

[0036] (1) Low profile and compact system structure: On the basis of ensuring that the antenna realizes dual - circular polarization, a low - profile design is carried out on the high - gain antenna with double - layer patches, reducing its effective height.

[0037] (2) Large scanning range: The present invention adjusts the two input ports of the metal bridge 9 to make their physical distances far from each other, improving the isolation degree of the input ports. At the same time, a metal isolation ring 8 and metal isolation posts are added to the antenna to improve the isolation degree between units. The excellent isolation degree enables the antenna array to achieve large - angle scanning.

[0038] (3) Solving the problem of line loss: The antenna is designed with a press - fit with the RF component part, reducing the use of cable connectors, minimizing additional losses, and ensuring the high gain of the antenna.

[0039] (4) Low cost: The present invention effectively utilizes semi - solid PP plates with a certain thickness, which not only serves as the press - fit material between the core plates but also as a plate with a fixed dielectric constant. The number of core plates is reduced, and the number of press - fit times in the processing process is decreased, thereby reducing the processing cost.

[0040] (5) Stable structure: The present invention uses a plate with a low dielectric constant to replace the conventional cavity structure, avoiding problems such as depression deformation or even fracture of the plate due to the cavity during the antenna processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a stacked diagram of the antenna unit packaging of a KU - band dual - circular - polarization packaged phased - array antenna;

[0042] Figure 2 It is a schematic diagram of the overall structure of the antenna element of a KU - band dual - circular - polarization packaged phased - array antenna;

[0043] Figure 3 It is a schematic diagram of the overall structure of the array of a KU - band dual - circular - polarization packaged phased - array antenna;

[0044] Figure 4 It is a schematic diagram of the radiation patch structure of a KU - band dual - circular - polarization packaged phased - array antenna;

[0045] Figure 5 It is a schematic diagram of the bridge structure of a KU - band dual - circular - polarization packaged phased - array antenna;

[0046] Figure 6 It is a graph of the active voltage standing - wave ratio of an embodiment of a KU - band dual - circular - polarization packaged phased - array antenna;

[0047] Figure 7 It is a simulation diagram of the left - hand circular - polarization axial gain - frequency of the array element of an embodiment of a KU - band dual - circular - polarization packaged phased - array antenna;

[0048] Figure 8 It is a simulation diagram of the right - hand circular - polarization axial gain - frequency of the array element of an embodiment of a KU - band dual - circular - polarization packaged phased - array antenna;

[0049] Figure 9 It is a simulation diagram of the scanning characteristics of the array of an embodiment of a KU - band dual - circular - polarization packaged phased - array antenna;

[0050] Figure 10 It is a diagram of the axial ratio - frequency of the array of an embodiment of a KU - band dual - circular - polarization packaged phased - array antenna.

[0051] Reference numerals:

[0052] 1. First dielectric plate; 2. Second dielectric plate; 3. Third dielectric plate; 4. Fourth dielectric plate; 5. First metal radiation patch; 6. Second metal radiation patch; 7. Metal ground; 8. Metal isolation strip; 9. Metal bridge; 91. First input port; 92. Second input port; 93. Main branch; 94. First output port; 95. Second output port; 10. First metal via; 11. Second metal via; 12. Third metal via; 13. First back - drilled hole; 14. Second back - drilled hole. Detailed implementation manners

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0054] Embodiment 1

[0055] As shown Figures 1-5 in the figure, a KU-band dual-circularly polarized packaged phased array antenna may include multiple sub-arrays, and each sub-array contains 4*4 antenna elements. Here, a single antenna element is described as a typical example. The antenna element mainly includes a first dielectric plate 1, a second dielectric plate 2, a third dielectric plate 3, a fourth dielectric plate 4, a first metal radiation patch 5, a second metal radiation patch 6, a metal ground 7, a metal isolation strip 8, a metal bridge 9, a first metal via 10, a second metal via 11, a third metal via 12, a first back drill hole 13, and a second back drill hole 14;

[0056] The second metal radiation patch 6 is located on the upper surface of the second dielectric plate 2. Both the first metal radiation patch 5 and the second metal radiation patch 6 adopt the form of octagonal coupled patches to form a double-layer stacked microstrip antenna, realizing dual-linear polarization radiation;

[0057] The metal isolation strip 8 is located on the upper surface of the first dielectric plate 1, at the edge of the antenna element, and is connected to adjacent array elements to improve the port isolation between array elements;

[0058] The metal bridge 9 is located on the upper surface of the fourth dielectric plate 4, adopting the form of a strip line bridge, and is connected to the upper-layer radiation patch through the third metal via 12 to complete the switching of dual-circular polarization;

[0059] The first metal via 10 drills a hole from the bottom of the fourth dielectric plate 4 upwards to the metal bridge 9 to realize the feeding of the array element, and through the multi-layer board lamination technology, the connection with the RF component part is completed;

[0060] After the first dielectric plate 1, the second dielectric plate 2, and the third dielectric plate 3 are laminated first, after the first back drill hole 13 and the third metal via 12 are drilled, they are then laminated with the fourth dielectric plate 4, and the second back drill hole 14, the first metal vias 10 and 11 are drilled. Each layer of dielectric plate is laminated through a semi-solid PP material to realize the packaging design of the antenna;

[0061] Since the number of antenna array elements is large, a sub-array combination design is adopted. One sub-array contains 4*4 antenna elements. After the sub-array antenna and the sub-array RF component part are laminated, the sub-arrays are then spliced. This sub-array has an expandable function and can be expanded in multiple modules according to actual needs;

[0062] In this embodiment, the KU-band dual-circularly polarized packaged phased array antenna is composed of 4*4 antenna elements and can be expanded as a sub-array into a large array. In the antenna element of the present invention, there are 4 layers of dielectric plates, and two layers of metal radiation patches 5 and 6 are respectively located on the upper surfaces of the first dielectric plate 1 and the second dielectric plate 2. The upper surface of the third dielectric plate 3 is covered with a metal bottom plate 7, and the upper surface of the fourth dielectric plate 4 is covered with a metal bridge 9.

[0063] The first metal radiation patch 5 and the second metal radiation patch 6 are both located at the center position of the antenna element. The first metal radiation patch 5 is an irregular octagon, with a long side of 2.82 mm and a short side of 1.6 mm. The second radiation patch 6 is an equilateral octagon with a side length of 2.82 mm. The double-layer microstrip antenna structure can effectively expand the antenna bandwidth, reduce the antenna profile height, and realize the miniaturized design of the antenna.

[0064] In the present invention, a metal isolation strip 8 and a second metal via 11 are added on the upper surface of the first dielectric plate 1. The width of the metal isolation strip 8 is 1 mm. At the edge of the antenna element, it surrounds the first radiation patch 5 and is connected to the isolation strip of the adjacent element. The diameter of the second metal via 11 is 0.3 mm, and the hole pitch is 1.21 mm. The metal isolation strip 8 is connected to the bottom plate (the fourth dielectric plate 4). This method can effectively confine the electromagnetic energy of a single element, reduce the isolation between adjacent ports, and improve the isolation.

[0065] In the present invention, the feeding adopts a 90° bridge (metal bridge 9) in the form of a strip line. The 1st and 2nd branches (the first branch L1 and the second branch L2) are designed perpendicular to the main branch 93. While reducing the spatial size, the isolation between the 1st and 2nd ports (the first input port 91 and the second input port 92) is increased. The feeding forms of the input ports 1 and 2 of the bridge are quasi-coaxial feeding. Six equally spaced circularly arranged metal posts and the metal post located at the center point together form a quasi-coaxial structure to confine the signals transmitted over a long distance, reduce signal leakage, and improve the performance of long-distance transmission. It also includes a first output port 94 and a second output port 95. Among them, the perpendicular distance from the feeding branch of the bridge to the center of the patch is 0.7 mm, the distances from the feeding point of the bridge to the center of the patch along the X-axis and Y-axis are 1.72 mm, and the length of the second branch L2 is about half of the wavelength, which can generate a 90° phase difference and determine the axial ratio of the antenna;

[0066] The present invention uses a total of 5 dielectric plates. The first dielectric plate 1, the second dielectric plate 2, and the fourth dielectric plate 4 are all made of low-loss m6 material with a dielectric constant of 3.63. The thickness of the first dielectric plate 1 is 1.5 mm, the thickness of the second dielectric plate 2 is 0.625 mm, and the thickness of the fourth dielectric plate 4 is 0.25 mm. The third dielectric plate 3 uses low-loss m6 material with a dielectric constant of 3.33 and a thickness of 0.25 mm. Among them, the second dielectric plate 2 replaces the traditional cavity structure, avoiding problems such as depression deformation or even fracture of the plate due to the cavity during the antenna processing, and improving the stability of the array structure.

[0067] For the two polarization feeding parts of the antenna of the present invention, the form of the first metal via 10 is used to introduce the lower surface of the fourth dielectric plate 4, and through the lamination technology, it is effectively connected to the RF components, reducing the loss of the RF connector / RF cable and improving the overall performance.

[0068] The overall thickness of the antenna of the present invention is about 2.65 mm. The low profile is achieved by using a multi-layer microstrip stacking and a multi-layer board encapsulation and pressing process. On the basis of ensuring the antenna performance, during the encapsulation and pressing process, a variety of back-drilling and via designs are adopted. The aperture diameters of the first back-drilling 13 and the second back-drilling 14 are 0.35 mm. The center of the second back-drilling 14 is aligned with the center of the third metal via 12, and the center of the first back-drilling 13 is aligned with the center of the first metal via 10. In this embodiment, the lateral and longitudinal distances from the center of the second back-drilling 14 and the third metal via 12 to the nearest edge of the second metal radiation patch 6 are both 1.3 mm.

[0069] The aperture size of the element of the present invention is 13.1 * 13.1 mm, the element spacing is selected as 13.1 mm, and the array is composed of 4 * 4 antenna elements. According to the operating frequency and the array scanning range, a suitable element spacing is selected. The size of the element spacing determines whether grating lobes appear during the array scanning process, deteriorating the scanning characteristics. The element aperture is the same as the element spacing, which can realize the compact layout of the array.

[0070] The effect of this embodiment is as Figures 6-10 shown, realizing the reception and transmission of KU-band dual circular polarization signals.

[0071] The present invention fully considers the processing risks, replaces the original cavity structure with a core board structure without a cavity, avoids problems such as sheet depression deformation and even fracture due to the cavity during the antenna processing, and facilitates the formation of a larger-scale array based on this antenna element. However, it is usually difficult to form a larger-scale array with the cavity structure antenna element in the existing patent during actual processing.

[0072] In the present invention, a 3dB-90° hybrid is introduced. Combining it with the radiation patch can realize dual circular polarization. At the same time, considering the space limitation, a deformed design of the 3dB-90° hybrid is carried out.

[0073] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A KU band dual circular polarization packaged phased array antenna, characterized in that: The invention comprises n antenna units, where n is a positive integer greater than or equal to 2; the antenna units comprise a first dielectric plate (1), a second dielectric plate (2), a third dielectric plate (3), and a fourth dielectric plate (4) which are arranged in sequence from top to bottom, a first metal radiation patch (5) connected to the upper surface of the first dielectric plate (1), a second metal radiation patch (6) connected to the upper surface of the second dielectric plate (2), a metal ground (7) connected to the upper surface of the third dielectric plate (3), a metal isolation strip (8) connected to the edge of the upper surface of the first dielectric plate (1), and a metal bridge (9) connected to the upper surface of the fourth dielectric plate (4); The first metal radiation patch (5) and the second metal radiation patch (6) are both located at the center of the antenna unit, forming a double-layer stacked microstrip antenna and performing dual-linear polarization radiation, and the metal isolation band (8) surrounds the first metal radiation patch (5); The metal bridge (9) is a stripline bridge, connected to the second metal radiation patch (6) through a metal via, and performs dual circular polarization switching; The first dielectric plate (1), the second dielectric plate (2), the third dielectric plate (3), and the fourth dielectric plate (4) are all connected by pressing together semi-solid PP plates.

2. The KU band dual circular polarization packaged phased array antenna according to claim 1, characterized in that: The size of the first metal radiation patch (5) is smaller than the size of the second metal radiation patch (6); The first metal radiation patch (5) is an unequal-sided octagon, and the second metal radiation patch (6) is an equilateral octagon.

3. The KU band dual circular polarization packaged phased array antenna according to claim 2, characterized in that: The edge lines of the first metal radiation patch (5) are respectively parallel to the edge lines of the second metal radiation patch (6); The long side of the first metal radiation patch (5) is 2.82 mm and the short side is 1.6 mm, and the side lengths of the second metal radiation patch (6) are both 2.82 mm.

4. The KU band dual circular polarization packaged phased array antenna according to claim 1, characterized in that: The metal bridge (9) is a 90° bridge; The metal bridge (9) comprises a first input port (91) and a second input port (92) located on both sides, a first branch L1 connected to the first input port (91), a second branch L2 connected to the second input port (92), a third branch L3 connected between the first branch L1 and the second branch L2, a main branch (93) connected to the first branch L1, the second branch L2, and the third branch L3, and a first output port (94) and a second output port (95) respectively connected to output ends of the main branch (93); The first branch L1 and the second branch L2 are both perpendicular to the main branch (93); the feeding forms of the first input port (91) and the second input port (92) are both quasi-coaxial feeding; The length of the third branch L3 is half the wavelength and can generate a phase difference of 90°.

5. The KU band dual circular polarization packaged phased array antenna according to claim 4, characterized in that: The quasi-coaxial structure is composed of 6 metal pillars arranged in a circle with equal spacing and a metal pillar located at the point of the circle.

6. The KU band dual circular polarization packaged phased array antenna according to claim 1, characterized in that: It also includes a first metal via (10) connecting the fourth dielectric plate (4) to the metal bridge (9), a second metal via (11) connecting the metal isolation strip (8) to the fourth dielectric plate (4), a third metal via (12) connecting the second metal radiation patch (6) to the metal bridge (9), a first back-drilled hole (13) opening upward from the third dielectric plate (3) to the top of the first dielectric plate (1) and having its center aligned with the first metal via (10), and a second back-drilled hole (14) penetrating the fourth dielectric plate (4) and having its center aligned with the center of the third metal via (12); The first metal via (10) introduces polarized power feeding into the lower surface of the fourth dielectric plate (4), and the second metal via (11) is evenly arranged on the metal isolation belt (8) and connects the metal isolation belt (8) to the fourth dielectric plate (4).

7. The KU band dual circular polarization packaged phased array antenna according to claim 6, characterized in that: The method for preparing the KU band dual circular polarization packaged phased array antenna comprises the following steps: S1, connecting the first metal radiation patch (5) to the upper surface of the first dielectric plate (1), connecting the second metal radiation patch (6) to the upper surface of the second dielectric plate (2), connecting the metal ground (7) to the upper surface of the third dielectric plate (3), and connecting the metal bridge (9) to the upper surface of the fourth dielectric plate (4); S2, pressing the first dielectric plate (1), the second dielectric plate (2) and the third dielectric plate (3) together by means of a semi-solid PP plate; S3, drilling the third metal via (12) and the first back-drilled hole (13) to obtain a first substructure; S4, pressing the first substructure and the fourth dielectric plate (4) together; S5, drilling a second back drilling hole (14), the first metal via hole (10) and the second metal via hole (11), and the KU band dual circular polarization packaged phased array antenna is completed.

8. The KU band dual circular polarization packaged phased array antenna according to claim 7, characterized in that: In step S1, n of the first metal radiation patches (5) are connected to the upper surface of the first dielectric plate (1), n ​​of the second metal radiation patches (6) are connected to the upper surface of the second dielectric plate (2), n of the metal grounds (7) are connected to the upper surface of the third dielectric plate (3), and n of the metal bridges (9) are connected to the upper surface of the fourth dielectric plate (4).

9. The KU band dual circular polarization packaged phased array antenna according to claim 7, characterized in that: The KU-band dual circular polarization packaged phased array antenna comprises n*n antenna units. The KU-band dual circular polarization packaged phased array antenna can also be used as a subarray antenna to be expanded into a large array antenna. During expansion, the subarray antenna and the subarray radio frequency component are pressed together and then spliced.

10. The KU band dual circular polarization packaged phased array antenna according to claim 4, characterized in that: The first dielectric plate (1), the second dielectric plate (2) and the fourth dielectric plate (4) are all made of low-loss M6 material with a dielectric constant of 3.63; the thickness of the first dielectric plate (1) is 1.5 mm, the thickness of the second dielectric plate (2) is 0.625 mm, and the thickness of the fourth dielectric plate (4) is 0.25 mm; The second dielectric plate (2) is a dielectric layer without a cavity; The third dielectric plate (3) is made of low-loss M6 material, has a dielectric constant of 3.33 and a thickness of 0.25 mm; The vertical distance between the feeding branch of the metal bridge (9) and the center of the first metal radiation patch (5) is 0.7 mm, and the distance from the center of the feeding branch of the metal bridge (9) to the center of the second output port (95) is 1.72 mm; The KU-band dual circular polarization packaged phased array antenna is composed of 4*4 antenna units.

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