Ellipsoid phased array antenna and unmanned aerial vehicle

Abstract

The present invention discloses an ellipsoidal phased array antenna and an unmanned aerial vehicle (UAV); the antenna comprises a base plate, a plurality of dual-ellipsoidal antennas, and a housing; the dual-ellipsoidal antennas are disposed on the base plate, the housing is adapted to the base plate, and a cover is disposed on the outside of the dual-ellipsoidal antenna; the dual-ellipsoidal antenna comprises a first sub-ellipsoid, a second sub-ellipsoid, and a coaxial line connecting the first and second sub-ellipsoids; the short axes of the first and second sub-ellipsoids are perpendicular to the base plate, the lengths of the short axes of the first and second sub-ellipsoids are adapted to the height of the housing, and both the first and second sub-ellipsoids are provided with facets. The ellipsoidal phased array antenna of the present invention is used for air-to-ground communications and electronic countermeasures on UAVs, and has the advantages of being small in size, wide in bandwidth, and wide in beam coverage.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle (UAV) antennas, and in particular to an ellipsoidal phased array antenna and a UAV. Background Art

[0002] Drones (UAVs) offer a wide range of applications, low cost, and high efficiency. They are maneuverable and easy to use, and hold broad application prospects across various fields. Their light weight and compact size place high demands on their communication antennas.

[0003] The antennas commonly used in existing drones include FPC antennas, laser-cut (LDS) antennas, PCB trace antennas, and GNSS antennas.

[0004] Existing drone antennas have narrow bandwidth and beam coverage when they are small. Increasing the size of drone antennas, while increasing bandwidth and beam coverage, conflicts with the drone's inherent light weight and small size. Summary of the Invention

[0005] The main technical problem solved by the present invention is to provide an ellipsoidal phased array antenna, which solves the problem of installing a small-sized antenna on a UAV while also meeting the requirements of a broadband operating frequency range and a wide beam coverage range.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is to provide an ellipsoidal phased array antenna, including a base plate, a plurality of dual-ellipsoidal antennas and a shell; the dual-ellipsoidal antenna is arranged on the base plate, the shell is adapted to the base plate, and the cover is arranged on the outside of the dual-ellipsoidal antenna; the dual-ellipsoidal antenna includes a first sub-ellipsoid, a second sub-ellipsoid, and a coaxial line connecting the first sub-ellipsoid and the second sub-ellipsoid; the short axes of the first sub-ellipsoid and the second sub-ellipsoid are perpendicular to the base plate, the short axis lengths of the first sub-ellipsoid and the second sub-ellipsoid are adapted to the height of the shell, and the first sub-ellipsoid and the second sub-ellipsoid are both provided with cross-sections.

[0007] Preferably, two cross-sections of the first sub-ellipsoid and / or the second sub-ellipsoid located at the diagonal corners of the bottom plate are provided, one cross-section is flush with the transverse side of the bottom plate, and the other cross-section is flush with the longitudinal side of the bottom plate.

[0008] Preferably, there are three dual ellipsoidal antennas, namely, a first auxiliary dual ellipsoidal antenna, a main dual ellipsoidal antenna and a second auxiliary dual ellipsoidal antenna. The main dual ellipsoidal antenna is arranged in the middle of the base plate, and the first auxiliary dual ellipsoidal antenna and the second auxiliary dual ellipsoidal antenna are respectively arranged on both sides of the main dual ellipsoidal antenna.

[0009] Preferably, the first auxiliary double ellipsoid antenna and the second auxiliary double ellipsoid antenna are tiltedly arranged on the base plate, and have a first preset angle with the base plate; the main control double ellipsoid antenna is tiltedly arranged in the middle of the base plate, and has a second preset angle with the base plate.

[0010] Preferably, the second preset angle is greater than the first preset angle.

[0011] Preferably, the shortest distance between the first auxiliary dual ellipsoidal antenna and the second auxiliary dual ellipsoidal antenna and the main control dual ellipsoidal antenna is 0.3λ-0.6λ, where λ is the wavelength corresponding to the center frequency of the operating frequency range of the ellipsoidal phased array antenna.

[0012] Preferably, the first sub-ellipsoid and the second sub-ellipsoid are each formed by merging two semi-ellipsoids, and a connecting seat is provided at the outer edge of the connection between the semi-ellipsoids.

[0013] Preferably, the coaxial line includes a first connecting member connected to the first sub-ellipsoid, and a second connecting member connected to the second sub-ellipsoid, the first connecting member includes a connecting portion and an internal portion, the connecting portion is fixedly arranged on the first sub-ellipsoid, the second connecting member is passed through the outer wall of the second sub-ellipsoid, and the internal portion is passed through the second connecting member.

[0014] Preferably, the ellipsoidal phased array antenna further includes a base, which is arranged on the bottom plate and is used to fix the first sub-ellipsoid or the second sub-ellipsoid.

[0015] The present invention also provides a UAV, comprising the above-mentioned ellipsoidal phased array antenna.

[0016] The beneficial effects of the present invention are as follows: the ellipsoidal phased array antenna of the present invention is used on unmanned aerial vehicles to realize air-to-ground communication and electronic countermeasures, and has the advantages of small size, wide bandwidth and wide beam coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of an ellipsoidal phased array antenna according to the present invention;

[0018] Figure 2 is a schematic diagram of the structure inside the housing of an embodiment of the ellipsoidal phased array antenna according to the present invention;

[0019] Figure 3 is a schematic diagram of a top view of the structure of an ellipsoidal phased array antenna according to an embodiment of the present invention;

[0020] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure in the AA direction;

[0021] Figure 5 2. It is a schematic structural diagram of a half ellipsoid according to an embodiment of the ellipsoidal phased array antenna of the present invention;

[0022] Figure 6 is a schematic structural diagram of the other half of the ellipsoid of an embodiment of the ellipsoidal phased array antenna according to the present invention;

[0023] Figure 7 2. It is a schematic structural diagram of the coaxial line of an ellipsoidal phased array antenna according to an embodiment of the present invention;

[0024] Figure 8 2. It is a structural schematic diagram of a base of an ellipsoidal phased array antenna according to an embodiment of the present invention;

[0025] Figure 9 2. It is a structural diagram of an embodiment of an ellipsoidal phased array antenna installed on a UAV according to the present invention;

[0026] Figure 10 2. It is a structural diagram of another embodiment of the UAV installation of an ellipsoidal phased array antenna according to the present invention;

[0027] Figure 11 2. It is a structural diagram of another embodiment of the UAV installation of an ellipsoidal phased array antenna according to the present invention;

[0028] Figure 12 is a schematic diagram of the standing wave ratio of an ellipsoidal phased array antenna according to an embodiment of the present invention;

[0029] Figure 13 is a schematic diagram of the standing wave ratio when the ellipsoidal phased array antenna according to the present invention does not have a cut surface;

[0030] Figure 14 is a schematic diagram of the standing wave ratio when the first preset angle of the ellipsoidal phased array antenna is equal to the second preset angle according to the present invention;

[0031] Figure 15 is a beam synthesis diagram of the ellipsoidal phased array antenna according to the present invention when the operating frequency is 0.8 GHz;

[0032] Figure 16 is a beam synthesis diagram of the ellipsoidal phased array antenna according to the present invention when the operating frequency is 1.6 GHz;

[0033] Figure 17 This is a beam synthesis diagram when the operating frequency of the ellipsoidal phased array antenna according to the present invention is 2.4 GHz. DETAILED DESCRIPTION

[0034] To facilitate understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0035] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are intended solely for the purpose of describing specific embodiments and are not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0036] For the description of the present invention, the non-limiting Figure 1 The marks "front", "rear", "up", "down", "left", and "right" shown in the figure are used to facilitate understanding of the embodiment and are not intended to limit the present invention. Among them, the front-to-back direction represents the horizontal direction, the left-right direction represents the longitudinal direction, and the up-down direction represents the vertical direction.

[0037] Figures 1-8 The embodiment of the ellipsoidal phased array antenna of the present invention is shown, comprising a base plate 10, a plurality of dual ellipsoidal antennas 20, and a housing 40. The housing 40 covers the upper side of the base plate 10 when in use. The dual ellipsoidal antennas 20 are arranged on the base plate 10, and the housing is adapted to the base plate 10 and is arranged outside the dual ellipsoidal antennas 20. The dual ellipsoidal antennas 20 include a first sub-ellipsoid 201, a second sub-ellipsoid 202, and a coaxial line 203 connecting the first sub-ellipsoid 201 and the second sub-ellipsoid 202. The short axes of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 are perpendicular to the base plate 10, and the lengths of the short axes of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 are adapted to the height of the housing 40. The first sub-ellipsoid 201 and the second sub-ellipsoid 202 are both provided with a cut surface 204.

[0038] Preferably, two cross-sections 204 are provided on the first sub-ellipsoid 201 and / or the second sub-ellipsoid 202 located at the diagonal corners of the base plate 10 , one cross-section 204 is flush with the lateral side of the base plate 10 , and the other cross-section 204 is flush with the longitudinal side of the base plate 10 .

[0039] The present invention combines the beams of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 through the coaxial line 203 to improve the coverage of the antenna beam.

[0040] Adapting the minor axis lengths of the first and second sub-ellipsoids 201 and 202 to the height of the housing 40 can ensure that the first and second sub-ellipsoids 201 and 202 have the maximum minor axis lengths within the housing 40, thus enabling the antenna to have a wider operating bandwidth.

[0041] The long axis length of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 is usually greater than the short axis length of the first sub-ellipsoid 201 and the second sub-ellipsoid 202, so that the first sub-ellipsoid 201 and the second sub-ellipsoid 202 will interfere with the housing 40 being covered on the bottom plate. Therefore, the inner side surface of the housing 40 is used as the reference plane, and the section 204 of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 is set so that the section 204 is flush with the side surface of the bottom plate 10, thereby ensuring that the first sub-ellipsoid 201 and the second sub-ellipsoid 202 have the largest short axis length in the housing 40, and ensuring that the volume of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 is reduced, reducing the overall size of the phased array antenna, and effectively reducing the impact of reflected waves. The ellipsoidal phased array antenna of the present invention is used for air-to-ground communication and electronic countermeasures on unmanned aerial vehicles, and has the advantages of small size, wide bandwidth and wide beam coverage.

[0042] Preferably, the first sub-ellipsoid 201 and the second sub-ellipsoid 202 are both made of metal.

[0043] Preferably, the bottom plate 10 is rectangular, and the shell 40 is cuboid.

[0044] Furthermore, two cross-sections 204 are provided for the first sub-ellipsoid 201 and / or the second sub-ellipsoid 202 at opposite corners of the base plate 10. One cross-section 204 is flush with the lateral side of the base plate 10 (in the accompanying drawings, this is the side in the front-to-back width direction), and the other cross-section is flush with the longitudinal side of the base plate 10 (in the accompanying drawings, this is the side in the left-to-right length direction). This further reduces the volume of the first sub-ellipsoid 201 and the second sub-ellipsoid 202, thereby reducing the overall size of the phased array antenna.

[0045] Preferably, the dual ellipsoid antenna 20 is provided with three, namely a first auxiliary dual ellipsoid antenna 206, a main dual ellipsoid antenna 208, and a second auxiliary dual ellipsoid antenna 207. The main dual ellipsoid antenna 208 is arranged in the middle of the base plate 10, and the first auxiliary dual ellipsoid antenna 206 and the second auxiliary dual ellipsoid antenna 207 are respectively arranged on both sides of the main dual ellipsoid antenna 208. The main dual ellipsoid antenna 208 is used to determine the polarization mode, beam scanning range, etc. of the phased array antenna. The feed phase of the first auxiliary dual ellipsoid antenna 206 is used as the reference phase, and the second auxiliary dual ellipsoid antenna 207 is combined with the main dual ellipsoid antenna 208 beam. This can improve the beam coverage range.

[0046] Preferably, Figure 3As shown, the first auxiliary dual-ellipsoid antenna 206 and the second auxiliary dual-ellipsoid antenna 207 are tilted on the base plate 10, each forming a first preset angle a with the base plate 10. The main dual-ellipsoid antenna 208 is tilted in the middle of the base plate 10, forming a second preset angle b with the base plate 10. The first preset angle a and the second preset angle b can be equal or different. The first preset angle a and the second preset angle b can be adjusted according to design requirements to achieve a good standing wave ratio within a certain operating bandwidth.

[0047] Preferably, the second preset angle b is greater than the first preset angle a. This enables the phased array antenna to have a better standing wave ratio.

[0048] Preferably, the first preset angle a is 30°, and the second preset angle b is 45°.

[0049] Preferably, the shortest distance s between the first auxiliary dual ellipsoidal antenna 206 and the second auxiliary dual ellipsoidal antenna 207 and the main control dual ellipsoidal antenna 208 is 0.3λ-0.6λ, where λ is the wavelength corresponding to the center frequency 1.6GHz of the operating frequency range (0.80GHz-2.40GHz) of the ellipsoidal phased array antenna, preferably 0.4λ.

[0050] The first sub-ellipsoid 201 and the second sub-ellipsoid 202 can be an integral structure or a split structure. Figure 1 、 Figure 5 and Figure 6 As shown, the first sub-ellipsoid 201 and the second sub-ellipsoid 202 are each formed by merging two semi-ellipsoids 205, and a connecting seat 2051 is provided at the outer edge of the connection between the semi-ellipsoids 205. The connecting seats 2051 on the two semi-ellipsoids 205 can be connected by bolts, and the two semi-ellipsoids 205 form the first sub-ellipsoid 201 or the second sub-ellipsoid 202. The first sub-ellipsoid 201 and the second sub-ellipsoid 202 are both formed by merging two semi-ellipsoids 205. The semi-ellipsoid 205 connected to the coaxial line 203 can be fixed on the base 30 first, and then the coaxial line 203 can be fixed to the semi-ellipsoid 205. After the coaxial line 203 is fixed, the other semi-ellipsoid 205 is fixed on the base 30, and then the two semi-ellipsoids 205 are merged into the first sub-ellipsoid 201 or the second sub-ellipsoid 202 by passing bolts through the connecting seat 2051. In this way, the first sub-ellipsoid 201 can be conveniently fixed on the base 30, which is convenient for installation and disassembly, thereby improving the installation efficiency of the antenna.

[0051] Preferably, Figure 7 As shown, the coaxial line 203 includes a first connecting member 2031 connected to the first sub-ellipsoid 201 and a second connecting member 2032 connected to the second sub-ellipsoid 202.

[0052] The first connecting member 2031 includes a connecting portion 20311 and an internal portion 20312 . The connecting portion 20311 is fixedly arranged on the first sub-ellipsoid 201 . The second connecting member 2032 is passed through the outer wall of the second sub-ellipsoid 202 . The internal portion 20312 is passed through the second connecting member 2032 .

[0053] The first sub-ellipsoid 201 and the second sub-ellipsoid 202 are combined into a beam through the coaxial line 203 to improve the coverage of the antenna beam.

[0054] Preferably, the connecting portion 20311 and the internal portion 20312 are both cylindrical, and the diameter of the connecting portion 20311 is larger than the diameter of the internal portion 20312.

[0055] Preferably, the second connecting member 2032 is cylindrical.

[0056] Preferably, Figure 8 As shown, the ellipsoidal phased array antenna further includes a base 30 , the base material of which is non-conductive nylon, fluorinated ethylene propylene resin, fluoropolymer foam resin, fluoropolymer resin, perfluoroalkoxy resin, etc. The base 30 is disposed on the base plate 10 and is used to fix the first sub-ellipsoid 201 or the second sub-ellipsoid 202 .

[0057] Preferably, a through hole 301 is provided on the base 30 , and the feeder connected to the coaxial line 203 can pass through the through hole 301 into the second connecting member 2032 and be connected to the coaxial line 203 .

[0058] The present invention also provides a drone, comprising the above-mentioned ellipsoidal phased array antenna. Figure 9 As shown, the ellipsoidal phased array antenna is installed on the lower side of the UAV wing 1. The direction of the antenna (i.e., the normal direction of the shell) is consistent with the flight direction of the UAV, and the base plate of the antenna is perpendicular to the corresponding plane of the wing 1. Figure 10 It further shows that the ellipsoidal phased array antenna is facing obliquely downward of the UAV, and the angle between the base plate of the antenna and the plane where the wing 1 is located is 45°. Figure 11 It further shows that the ellipsoidal phased array antenna is facing directly below the drone, and the bottom plate of the antenna is parallel to the plane where the wing 1 is located. Reasonable settings can also be made as needed.

[0059] To further illustrate, using a specific embodiment, the dimensions of the housing 40 for installation on a drone are limited: 250mm x 130mm x 90mm in length, width, and height. The short axis length is reduced to less than 90mm, for example, between 85mm and 89mm. The requirements for the ellipsoidal phased array antenna are: within the operating frequency band of 0.8 to 2.4GHz, a beam scan range of ±45°, a gain greater than 2dBi, linear polarization, and a standing wave ratio less than 2.

[0060] like Figure 12 、 Figure 13 and Figure 14 As shown in the figure, the horizontal axis Freq is the operating bandwidth, and the vertical axis Y1 is the standing wave ratio. The upper curve VSWR(2) represents the standing wave ratio curve of the main dual ellipsoidal antenna. VSWR(1) and VSWR(3) are the standing wave ratio curves of the first auxiliary dual ellipsoidal antenna and the second auxiliary dual ellipsoidal antenna, respectively. The standing wave ratio curves of VSWR(1) and VSWR(3) are close to overlapping.

[0061] from Figure 12 It can be seen that the present invention has a standing wave ratio less than 2 within the working bandwidth of 0.80 GHz to 2.40 GHz. Therefore, the ellipsoidal phased array antenna of the present invention has a good standing wave ratio.

[0062] In contrast, the dimensions of the shell 40 remain unchanged at 250mm*130mm*90mm in length, width and height. However, the length of the minor axis is reduced, and the length of the major axis is adapted to the width of the shell 40, which reduces the volume of the first ellipsoid and the second ellipsoid. Figure 13 As shown, from Figure 13 It can be seen that within the operating bandwidth of 1.25 GHz to 2.40 GHz, the standing wave ratio is less than 2. Obviously, after the volume of the first ellipsoid and the second ellipsoid is reduced, the operating bandwidth range in which the standing wave ratio is less than 2 is significantly reduced.

[0063] In contrast, the dimensions of the housing 40 remain unchanged: 250mm*130mm*90mm. The second preset angle is equal to the first preset angle. Figure 14 As shown, from Figure 14 It can be seen that within the operating bandwidth of 1.62 GHz to 2.40 GHz, the standing wave ratio is less than 2. Obviously, when the second preset angle is equal to the first preset angle, the operating bandwidth range within which the standing wave ratio is less than 2 is significantly reduced.

[0064] In summary, the present invention can significantly improve the operating bandwidth range of the phased array antenna with a standing wave ratio less than 2 by setting the cross-sections of the first ellipsoid and the second ellipsoid, and the second preset angle being greater than the first preset angle.

[0065] Furthermore, in a specific embodiment, the dimensions of the housing 40 are: 250 mm*130 mm*90 mm in length, width and height, and the length of the minor axis is 85 mm.

[0066] When the operating frequency is 0.8 GHz, the beam synthesis diagram is as follows: Figure 15 As shown, the feeding phase table is shown in Table 1.

[0067] Figure 15 The horizontal coordinate theta represents the angle of the phased array antenna on the H plane, and the vertical coordinate Gain represents the gain.

[0068] Figure 16 and Figure 17 The horizontal and vertical coordinates are Figure 15 The meanings are the same and will not be repeated below.

[0069] Table 1 Scanning angles and feed phases of each beam at 0.8 GHz

[0070]

[0071] In Table 1, element 1 represents the first auxiliary dual-ellipsoidal antenna, element 2 represents the master dual-ellipsoidal antenna, and element 3 represents the second auxiliary dual-ellipsoidal antenna. The feed phase of element 1 is 0, which serves as the reference phase. Beams 1-4 have different beam coverages. The contents of Tables 2 and 3 are similar to those in Table 1 and are not described again below.

[0072] from Figure 15 It can be seen from Table 1 that the beam of the present invention has a wider coverage range and better gain.

[0073] When the operating frequency is 1.6 GHz, the beamforming diagram is as follows: Figure 16 As shown, the feeding phase table is shown in Table 2.

[0074] Table 2 Scanning angles of each beam and unit feed phase at 1.6 GHz

[0075]

[0076] When the operating frequency is 2.4GHz, the beam synthesis diagram is as follows: Figure 17 The feeding phase table is shown in Table 3.

[0077] Table 3 Scanning angles of each beam and unit feed phase at 2.4 GHz

[0078]

[0079] In summary, the present invention realizes that the standing wave ratio of the phased array antenna is not greater than 2.5 within the working bandwidth of 0.8 to 2.4 GHz, the polarization mode is linear polarization, and the minimum gain of the four beams of the antenna array within the beam scanning range of ±45° is not less than 2dBi. The ellipsoidal phased array antenna of the present invention is used for unmanned aerial vehicles to realize air-to-ground communication and electronic countermeasures, and has the advantages of small size, wide bandwidth and wide beam coverage.

[0080] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An ellipsoidal phased array antenna, characterized in that: It includes a bottom plate, a plurality of dual ellipsoid antennas and a shell; the dual ellipsoid antennas are arranged on the bottom plate, the shell is adapted to the bottom plate, and the cover is arranged on the outside of the dual ellipsoid antennas; The dual ellipsoid antenna includes a first sub-ellipsoid, a second sub-ellipsoid, and a coaxial line connecting the first sub-ellipsoid and the second sub-ellipsoid; The short axes of the first and second sub-ellipsoids are perpendicular to the bottom plate, the short axis lengths of the first and second sub-ellipsoids match the height of the shell, and the first and second sub-ellipsoids are both provided with a section.

2. The ellipsoidal phased array antenna according to claim 1, characterized in that: The first sub-ellipsoid and / or the second sub-ellipsoid located at the diagonal corners of the bottom plate is provided with two tangent planes, one tangent plane is flush with the transverse side of the bottom plate, and the other tangent plane is flush with the longitudinal side of the bottom plate.

3. The ellipsoidal phased array antenna according to claim 1, characterized in that: There are three dual ellipsoid antennas, namely the first auxiliary dual ellipsoid antenna, the main dual ellipsoid antenna and the second auxiliary dual ellipsoid antenna. The main dual ellipsoid antenna is arranged in the middle of the base plate, and the first auxiliary dual ellipsoid antenna and the second auxiliary dual ellipsoid antenna are respectively arranged on both sides of the main dual ellipsoid antenna.

4. The ellipsoidal phased array antenna according to claim 3, characterized in that: The first auxiliary double ellipsoid antenna and the second auxiliary double ellipsoid antenna are tiltedly arranged on the base plate, and both have a first preset angle with the base plate; the main control double ellipsoid antenna is tiltedly arranged in the middle of the base plate, and has a second preset angle with the base plate.

5. The ellipsoidal phased array antenna according to claim 4, characterized in that: The second preset angle is greater than the first preset angle.

6. The ellipsoidal phased array antenna according to claim 3, characterized in that: The shortest distance between the first auxiliary dual ellipsoidal antenna and the second auxiliary dual ellipsoidal antenna and the main control dual ellipsoidal antenna is 0.3λ-0.6λ, where λ is the wavelength corresponding to the center frequency of the operating frequency range of the ellipsoidal phased array antenna.

7. The ellipsoidal phased array antenna according to claim 1, characterized in that: The first sub-ellipsoid and the second sub-ellipsoid are both formed by merging two semi-ellipsoids, and a connecting seat is provided at the outer edge of the connection between the semi-ellipsoids.

8. The ellipsoidal phased array antenna according to claim 1, characterized in that: The coaxial line includes a first connecting member connected to the first sub-ellipsoid, and a second connecting member connected to the second sub-ellipsoid, the first connecting member includes a connecting portion and an internal portion, the connecting portion is fixedly arranged on the first sub-ellipsoid, the second connecting member is passed through the outer wall of the second sub-ellipsoid, and the internal portion is passed through the second connecting member.

9. The ellipsoidal phased array antenna according to claim 1, characterized in that: The ellipsoidal phased array antenna further includes a base, which is arranged on the bottom plate and is used to fix the first sub-ellipsoid or the second sub-ellipsoid.

10. A drone, characterized in that: The invention comprises the ellipsoidal phased array antenna according to any one of claims 1 to 9.

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