Elliptical-sphere phased array antenna design method

Abstract

The application discloses a kind of ellipsoid phased array antenna design methods;The method includes constructing phased array antenna simulation model, the phased array antenna simulation model includes shell and multiple groups of double ellipsoid antenna;The simulation of the phased array antenna simulation model is carried out, and the simulation parameter of the phased array antenna simulation model is acquired;Whether the simulation parameter meets design index is judged, if it meets, the basic simulation model of the phased array antenna is determined.Through the simulation of phased array simulation antenna model, simulation parameter is acquired, and whether simulation parameter meets design index is judged, and the basic simulation model is determined, so it can greatly shorten antenna design time, improve antenna design efficiency, and can conveniently adjust the parameter of phased array simulation antenna model, to adjust simulation parameter, so that simulation parameter meets design index.

Description

Technical Field

[0001] This invention relates to the field of antenna design methods, and in particular to an ellipsoidal phased array antenna design method. Background Technology

[0002] Unmanned aerial vehicles (UAVs) are versatile, low-cost, and highly efficient; they possess excellent maneuverability, are easy to use, and have broad application prospects in various fields. UAVs are characterized by their light weight and small size. Due to these characteristics, UAVs require high-quality antennas for communication.

[0003] Current design of drone antennas typically involves using existing empirical formulas, combined with the design experience of antenna engineers and physical measurement and debugging. This process is lengthy, inefficient, and the antenna design parameters are not easy to adjust. Summary of the Invention

[0004] The main technical problem solved by this invention is to provide an ellipsoidal phased array antenna design method, which solves the problems of the lengthy and inefficient design process of existing UAV antennas and the difficulty in adjusting the antenna design parameters.

[0005] To address the aforementioned technical problems, one technical solution adopted by this invention is to provide an ellipsoidal phased array antenna design method, comprising the following steps: constructing a phased array antenna simulation model, wherein the phased array antenna simulation model includes a shell and multiple sets of dual ellipsoidal antennas; simulating the phased array antenna simulation model to obtain simulation parameters of the phased array antenna simulation model; determining whether the simulation parameters meet the design specifications, and if so, determining the basic simulation model of the phased array antenna.

[0006] Preferably, after determining the basic simulation model of the phased array antenna, the basic simulation model is further optimized to obtain an optimized simulation model of the phased array antenna.

[0007] Preferably, in constructing the phased array antenna simulation model, the maximum size of the housing is determined based on the installation space; the size and number of the dual ellipsoidal antennas are determined based on the maximum size of the housing.

[0008] Preferably, 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.

[0009] Preferably, the number of dual ellipsoidal antennas is determined, and the dual ellipsoidal antennas include three, namely a first auxiliary dual ellipsoidal antenna, a main control dual ellipsoidal antenna, and a second auxiliary dual ellipsoidal antenna. The main control dual ellipsoidal antenna is disposed in the middle of the housing, and the first auxiliary dual ellipsoidal antenna and the second auxiliary dual ellipsoidal antenna are disposed on both sides of the main control dual ellipsoidal antenna.

[0010] Preferably, further optimization of the basic simulation model includes: increasing the size of the first sub-ellipsoid and the second sub-ellipsoid, so that the minor axis length of the first sub-ellipsoid and the second sub-ellipsoid matches the height of the shell, and cutting off the parts of the first sub-ellipsoid and the second sub-ellipsoid that protrude from the shell along the major axis to form a cross-section, the cross-section being flush with the side of the shell that is tangent to it.

[0011] Preferably, further optimization of the basic simulation model includes: the first sub-ellipsoid and / or the second sub-ellipsoid located at the diagonal of the base plate have two cross-sections, one of which is flush with the transverse side of the base plate, and the other of which is flush with the longitudinal side of the base plate.

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

[0013] Preferably, further optimization of the basic simulation model includes: the first auxiliary dual-ellipsoidal antenna and the second auxiliary dual-ellipsoidal antenna are tilted on the base plate, each having a first preset angle with the base plate; the main control dual-ellipsoidal antenna is tilted in the middle of the base plate, having a second preset angle with the base plate, such that the second preset angle is greater than the first preset angle.

[0014] Preferably, further optimization of the basic simulation model includes: determining the shortest distance between the first auxiliary dual-ellipsoidal antenna and the second auxiliary dual-ellipsoidal antenna and the main control dual-ellipsoidal antenna to be 0.3λ-0.6λ, where λ is the wavelength corresponding to the center frequency of the ellipsoidal phased array antenna.

[0015] The beneficial effects of this invention are as follows: In this invention, by simulating the phased array simulation antenna model, obtaining simulation parameters, and determining whether the simulation parameters meet the design specifications, the basic simulation model is determined. This can greatly shorten the antenna design time, improve the antenna design efficiency, and conveniently adjust the parameters of the phased array simulation antenna model to adjust the simulation parameters so that the simulation parameters meet the design specifications. Attached Figure Description

[0016] Figure 1 This is a flowchart of an embodiment of the ellipsoidal phased array antenna design method according to the present invention; Figure 2 This is a schematic diagram of the structure of a phased array antenna according to an embodiment of the ellipsoidal phased array antenna design method of the present invention; Figure 3 This is a schematic diagram of the internal structure of the housing according to an embodiment of the ellipsoidal phased array antenna design method of the present invention; Figure 4 This is a top view schematic diagram of an embodiment of the ellipsoidal phased array antenna design method according to the present invention; Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure along the AA direction; Figure 6 This is a schematic diagram of the structure of half an ellipsoid according to an embodiment of the ellipsoidal phased array antenna design method of the present invention; Figure 7 This is a schematic diagram of the structure of another half-ellipsoid of an embodiment of the ellipsoidal phased array antenna design method according to the present invention; Figure 8 This is a schematic diagram of the coaxial structure of an embodiment of the ellipsoidal phased array antenna design method according to the present invention; Figure 9 This is a schematic diagram of the base structure according to an embodiment of the ellipsoidal phased array antenna design method of the present invention; Figure 10 This is a schematic diagram of the structure of an unmanned aerial vehicle (UAV) equipped with an ellipsoidal phased array antenna. Figure 11 This is a schematic diagram of another implementation of mounting an ellipsoidal phased array antenna on a drone; Figure 12 This is a schematic diagram of another implementation of mounting an ellipsoidal phased array antenna on a drone; Figure 13 This is a schematic diagram of the standing wave ratio (SWR) of a basic simulation model without a cross section in an embodiment of the ellipsoidal phased array antenna design method according to the present invention. Figure 14 This is a schematic diagram of the standing wave ratio (SWR) when the first preset angle is equal to the second preset angle in a basic simulation model of an embodiment of the ellipsoidal phased array antenna design method according to the present invention. Figure 15 This is a schematic diagram of optimizing the standing wave ratio of a simulation model according to an embodiment of the ellipsoidal phased array antenna design method of the present invention; Figure 16 This is a beamforming diagram of an optimized simulation model operating at a frequency of 0.8 GHz, according to an embodiment of the ellipsoidal phased array antenna design method of the present invention. Figure 17 This is a beamforming diagram of an optimized simulation model operating at a frequency of 1.6 GHz, according to an embodiment of the ellipsoidal phased array antenna design method of the present invention. Figure 18 This is a beamforming diagram of an optimized simulation model operating at a frequency of 2.4 GHz, according to an embodiment of the ellipsoidal phased array antenna design method of the present invention. Detailed Implementation

[0017] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0018] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is 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.

[0019] Figure 1 An embodiment of the ellipsoidal phased array antenna design method of the present invention is shown, including the following steps: Step S1: Construct a phased array antenna simulation model, which includes a shell and multiple sets of dual ellipsoidal antennas. Step S2: Simulate the phased array antenna simulation model to obtain the simulation parameters of the phased array antenna simulation model.

[0020] Step S3: Determine whether the simulation parameters meet the design specifications; if they do, then determine the basic simulation model of the phased array antenna.

[0021] If the requirements are not met, adjust the construction of the dual ellipsoidal antenna simulation model and re-perform the simulation until the simulation parameters meet the design specifications, and determine the basic simulation model of the corresponding phased array antenna.

[0022] In this invention, by simulating a phased array antenna model, obtaining simulation parameters, and determining whether the simulation parameters meet the design specifications, the basic simulation model is determined. This significantly shortens antenna design time and improves antenna design efficiency. Furthermore, the parameters of the phased array antenna model can be easily adjusted to ensure that the simulation parameters meet the design specifications.

[0023] Preferably, in constructing the phased array antenna simulation model, the maximum size of the housing 40 is determined based on the installation space; the size and number of the dual ellipsoidal antennas are determined based on the maximum size of the housing 40.

[0024] like Figures 2-9As shown, the phased array antenna includes a base plate 10, multiple dual-ellipsoidal antennas 20, and a housing 40. The housing 40 is fitted over the upper side of the base plate 10 during use. The dual-ellipsoidal antennas 20 are mounted on the base plate 10. The housing is adapted to the base plate 10 and covers the outside of the dual-ellipsoidal antennas 20. Each dual-ellipsoidal antenna 20 includes a first sub-ellipsoid 201, a second sub-ellipsoid 202, and a coaxial line 203 connecting the first and second sub-ellipsoids 201 and 202. The minor axes of the first and second sub-ellipsoids 201 and 202 are perpendicular to the base plate 10, and the lengths of the minor axes of the first and second sub-ellipsoids 201 and 202 are adapted to the height of the housing 40.

[0025] By adapting the minor axis lengths of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 to the height of the housing 40, it is possible to ensure that the first sub-ellipsoid 201 and the second sub-ellipsoid 202 have the maximum minor axis length within the housing 40, thereby enabling the antenna to have a wider operating bandwidth.

[0026] The number of dual-ellipsoidal antennas 20 is determined. Preferably, three dual-ellipsoidal antennas 20 are provided: a first auxiliary dual-ellipsoidal antenna 206, a main control dual-ellipsoidal antenna 208, and a second auxiliary dual-ellipsoidal antenna 207. The main control dual-ellipsoidal antenna 208 is located in the center of the base plate 10, and the first auxiliary dual-ellipsoidal antenna 206 and the second auxiliary dual-ellipsoidal antenna 207 are respectively located on both sides of the main control dual-ellipsoidal antenna 208. The polarization mode and beam scanning range of the phased array antenna are determined by the main control dual-ellipsoidal antenna 208. The feed phase of the first auxiliary dual-ellipsoidal antenna 206 is used as a reference phase, and the beams of the second auxiliary dual-ellipsoidal antenna 207 and the main control dual-ellipsoidal antenna 208 are combined. This can improve the beam coverage range.

[0027] Preferably, the first sub-ellipsoid 201 and the second sub-ellipsoid 202 are both made of metal.

[0028] Preferably, the base plate 10 is rectangular and the shell 40 is cuboid.

[0029] Preferred, such as Figure 8 As shown, the coaxial line 203 includes a first connector 2031 connected to the first sub-ellipsoid 201, and a second connector 2032 connected to the second sub-ellipsoid 202. The first connector 2031 includes a connecting part 20311 and an internal part 20312. The connecting part 20311 is fixedly disposed on the first sub-ellipsoid 201. The second connector 2032 passes through the outer wall of the second sub-ellipsoid 202, and the internal part 20312 is disposed inside the second connector 2032.

[0030] The first sub-ellipsoid 201 and the second sub-ellipsoid 202 are combined by coaxial line 203 to improve the coverage of the antenna beam.

[0031] Preferably, both the connecting portion 20311 and the internal portion 20312 are cylindrical, and the diameter of the connecting portion 20311 is larger than the diameter of the internal portion 20312.

[0032] Preferably, the second connector 2032 is cylindrical.

[0033] Preferred, such as Figure 9 As shown, the ellipsoidal phased array antenna also includes a base 30, which is made of non-conductive nylon, fluorinated ethylene propylene resin, fluoropolymer foam resin, fluoropolymer resin, perfluoroalkoxy resin, etc. The base 30 is mounted on the base plate 10 and is used to fix the first sub-ellipsoid 201 or the second sub-ellipsoid 202.

[0034] Preferably, the base 30 is provided with a through hole 301, through which the feed line connecting the coaxial line 203 can enter the second connector 2032 and connect with the coaxial line 203.

[0035] The aforementioned basic simulation model phased array antenna can be used on UAVs to realize air-to-ground communication and electronic countermeasures, which has the advantages of small size, wide bandwidth and wide beam coverage.

[0036] In application, once the simulation parameters meet the design specifications, the basic simulation model can be determined, and the phased array antenna can be manufactured based on the basic simulation model. However, although the simulation parameters of the basic simulation model initially meet the design specifications, they can be further optimized. The purpose of this optimization is to further improve the antenna's gain, bandwidth, radiation pattern, and other design parameters, given a fixed antenna size.

[0037] Preferably, after determining the basic simulation model of the phased array antenna, the basic simulation model is further optimized to obtain the optimized simulation model of the phased array antenna.

[0038] Further optimization of the basic simulation model includes three aspects: first, optimization of the size of the dual ellipsoidal antenna 20; second, optimization of the tilt angle of the dual ellipsoidal antenna 20; and third, optimization of the installation method of the dual ellipsoidal antenna 20.

[0039] Furthermore, the dimensions of the dual ellipsoidal antenna 20 are optimized to reduce the overall size of the phased array antenna and decrease the impact of reflected waves. In adjusting the construction of the dual ellipsoidal antenna 20, the dimensions of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 are increased so that the minor axis lengths of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 are adapted to the height of the housing 40. The portions of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 that protrude from the housing 40 along their major axis are cut off to form a cross-section, which is flush with the side of the housing 40 to which it is tangent.

[0040] The major axis lengths of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 are usually greater than the minor axis lengths of the first sub-ellipsoid 201 and the second sub-ellipsoid 202, which may cause the first sub-ellipsoid 201 and the second sub-ellipsoid 202 to obstruct the housing 40 from being mounted on the base plate. Therefore, taking the inner side surface of the housing 40 as the reference plane, a cross-section 204 of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 is set, and the cross-section 204 is flush with the transverse or longitudinal side surface of the base plate 10.

[0041] Preferably, the first sub-ellipsoid 201 and / or the second sub-ellipsoid 202 located at opposite corners of the base plate 10 have two cross-sections 204. 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. This ensures that the first sub-ellipsoid 201 and the second sub-ellipsoid 202 have the maximum minor axis length within the housing 40, and also ensures that the volume of the first sub-ellipsoid 201 and the second sub-ellipsoid 202 is reduced, thereby reducing the overall size of the phased array antenna and effectively reducing the influence of reflected waves.

[0042] Furthermore, optimizing the tilt angle of the dual-ellipsoidal antenna improves the operating bandwidth range that meets the VSWR requirements. Preferably, such as... Figure 4 As shown, the first auxiliary dual-ellipsoidal antenna 206 and the second auxiliary dual-ellipsoidal antenna 207 are obliquely mounted on the base plate 10, each having a first preset angle α with the base plate 10; the main control dual-ellipsoidal antenna 208 is obliquely mounted in the middle of the base plate 10, having a second preset angle b with the base plate 10. The first preset angle α and the second preset angle b can be equal or unequal. The first preset angle α 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.

[0043] 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 (VSWR).

[0044] Preferably, the first preset included angle a is 30° and the second preset included angle b is 45°.

[0045] Preferably, in adjusting the construction of the dual ellipsoidal antenna, the shortest distance between the first auxiliary dual ellipsoidal antenna, the second auxiliary dual ellipsoidal antenna, and the main control dual ellipsoidal antenna is determined to be 0.3λ-0.6λ, where λ is the wavelength corresponding to the center frequency of 1.6GHz in the frequency range (0.80GHz-2.40GHz) of the ellipsoidal phased array antenna, preferably 0.4λ.

[0046] Furthermore, the structure of the ellipsoidal phased array antenna is optimized to facilitate installation. Preferably, the first sub-ellipsoid 201 and the second sub-ellipsoid 202 can be an integral structure or a split structure; preferably, such as... Figure 1 , Figure 6 and Figure 7As shown, the first sub-ellipsoid 201 and the second sub-ellipsoid 202 are each formed by the combination of two semi-ellipsoids 205. A connecting seat 2051 is provided at the outer edge of the connection of the semi-ellipsoids 205. The connecting seats 2051 on the two semi-ellipsoids 205 can be connected by bolts. 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 combining two hemi-ellipsoids 205. First, the hemi-ellipsoid 205 connected by the coaxial line 203 can be fixed to the base 30. Then, the coaxial line 203 is fixed to the hemi-ellipsoid 205. After the coaxial line 203 is fixed, the other hemi-ellipsoid 205 is fixed to the base 30. Then, the two hemi-ellipsoids 205 are combined to form the first sub-ellipsoid 201 or the second sub-ellipsoid 202 by bolts passing through the connecting seat 2051. This allows the first sub-ellipsoid 201 to be easily fixed to the base 30, which is convenient for installation and disassembly and improves the installation efficiency of the antenna.

[0047] After optimizing the basic simulation model in the above three aspects, an optimized simulation model can be obtained, and a phased array antenna can be manufactured based on the optimized simulation model.

[0048] The phased array antenna designed in this invention can be installed on a drone, such as... Figure 10 As shown, the ellipsoidal phased array antenna is installed on the underside of the UAV wing 1. The orientation of the antenna (i.e., the normal direction of the shell) is consistent with the flight direction of the UAV, and the base plate 10 of the antenna is perpendicular to the plane corresponding to the wing 1. Figure 11 This further shows that the ellipsoidal phased array antenna is oriented diagonally downwards from the UAV, and the angle between the antenna base plate and the plane where wing 1 is located is 45°. Figure 12 This further shows that the ellipsoidal phased array antenna is pointing directly below the UAV, and the antenna's base plate is parallel to the plane of wing 1. It can also be configured as needed.

[0049] Furthermore, taking a specific embodiment as an example, the installation size on the UAV is limited, and the dimensions of the shell 40 are: 250mm * 130mm * 90mm. The minor axis length is reduced to less than 90mm, for example, between 85mm and 89mm. The requirements for the ellipsoidal phased array antenna are: gain greater than 2dBi within a beam scan range of ±45° in the operating frequency band of 0.8~2.4GHz, linear polarization, and VSWR less than 2.

[0050] exist Figure 13 , Figure 14 and Figure 15In the figure, the horizontal axis Freq represents the operating bandwidth, the vertical axis Y1 represents the standing wave ratio (SWR), and the curve VSWR(2) on the upper side represents the SWR curve of the main control dual ellipsoidal antenna. VSWR(1) and VSWR(3) are the SWR curves of the first auxiliary dual ellipsoidal antenna and the second auxiliary dual ellipsoidal antenna, respectively. The SWR curves of VSWR(1) and VSWR(3) are close to overlapping.

[0051] In the basic simulation model, the major axis lengths of the first and second sub-ellipsoids are adapted to the width of the shell 40, meaning the shapes of the first and second sub-ellipsoids are complete and not cut off, and their standing wave ratios are as follows: Figure 13 As shown, from Figure 13 As can be seen, its VSWR is less than 2 within the operating bandwidth of 1.25GHz-2.40GHz.

[0052] In the basic simulation model, the second preset angle is equal to the first preset angle. Its standing wave ratio is as follows: Figure 14 As shown, from Figure 14 As can be seen, its VSWR is less than 2 within the operating bandwidth of 1.62GHz-2.40GHz.

[0053] The dimensions and tilt angles of the first and second sub-ellipsoids in the basic simulation model are optimized as follows: First, the lengths of the major axes of the first and second sub-ellipsoids are increased, i.e., the volumes of the first and second ellipsoids are increased, and the portions of the first and second sub-ellipsoids exceeding the shell are removed to form a cross-section. Second, the first preset included angle is set to be smaller than the second preset included angle. This yields an optimized simulation model with a standing wave ratio of... Figure 15 As shown, from Figure 15 It can be seen that the VSWR of this invention is less than 2 within the operating bandwidth of 0.80GHz-2.40GHz, which shows that it has a good VSWR.

[0054] As can be seen from the above comparison, increasing the volumes of the first and second ellipsoids and setting the first preset angle to be smaller than the second preset angle expands the operating bandwidth with a VSWR of less than 2 from 1.25GHz-2.40GHz or 1.62GHz-2.40GHz to 0.80GHz-2.40GHz. Therefore, through the above optimization, the simulation parameters of the basic simulation model can be significantly optimized.

[0055] Furthermore, using a specific optimized simulation model as an example, the dimensions of the shell 40 are: length, width, and height: 250mm * 130mm * 90mm. The minor axis length is 85mm.

[0056] At an operating frequency of 0.8 GHz, its beamforming pattern is as follows: Figure 16 As shown, the power supply phase table is shown in Table 1.

[0057] Figure 16 In the figure, the abscissa theta represents the angle on the H-plane of the phased array antenna, and the ordinate Gain represents the gain. Figure 17 and Figure 18 the meanings of the abscissa and ordinate in are the same as those in Figure 16 , and will not be repeated hereinafter.

[0058] Table 1 Beam scanning angles and feeding phase table at 10.8GHz

[0059] In Table 1, element 1 represents a first auxiliary dual-ellipsoid antenna, element 2 represents a main control dual-ellipsoid antenna, element 3 represents a second auxiliary dual-ellipsoid antenna, and the feeding phase of element 1 is 0, which serves as a reference phase. Beam 1 to 4 have different beam coverage ranges. The contents in Table 2 and Table 3 are similar to those represented in Table 1, and will not be described hereinafter.

[0060] It can be seen from Figure 16 and Table 1 that the present invention has a wide beam coverage range and good gain.

[0061] When the operating frequency is 1.6GHz, the beamforming diagram thereof is shown in Figure 17 , and the feeding phase table is shown in Table 2.

[0062] Table 2 Beam scanning angles and element feeding phase table at 1.6GHz

[0063] When the operating frequency is 2.4GHz, the beamforming diagram thereof is shown in Figure 18 , and the feeding phase table is shown in Table 3.

[0064] Table 3 Beam scanning angles and element feeding phase table at 2.4GHz

[0065] In conclusion, the present invention implements that the standing wave ratio of the phased array antenna is not greater than 2.5 within the operating bandwidth of 0.8~2.4GHz, the polarization mode is linear polarization, and the minimum gain of 4 beams of the antenna array within the beam scanning range of ±45° is not lower than 2dBi. The ellipsoid phased array antenna of the present invention is used on unmanned aerial vehicles to realize air-ground communication and electronic countermeasures, and has the advantages of small size, wide bandwidth and wide beam coverage range.

[0066] In summary, the phased array antenna designed by this invention has a VSWR of no more than 2.5 within the 0.8~2.4GHz operating bandwidth, linear polarization, and a minimum gain of no less than 2dBi for the four beams of the antenna array within the ±45° beam scanning range. The phased array antenna can be used on UAVs to realize air-to-ground communication and electronic countermeasures, which has the advantages of small size, wide bandwidth and wide beam coverage.

[0067] Therefore, this invention, by simulating a phased array antenna model, obtaining simulation parameters, and determining whether the simulation parameters meet design specifications, establishes a basic simulation model. This significantly shortens antenna design time and improves antenna design efficiency. Furthermore, it allows for convenient adjustment of the phased array antenna model's parameters to ensure that the simulation parameters meet design specifications.

[0068] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for designing an ellipsoidal phased array antenna, characterized in that, Including the following steps: A phased array antenna simulation model is constructed, comprising a housing and multiple sets of dual ellipsoidal antennas. The maximum size of the housing is determined based on the installation space, and the size and number of the dual ellipsoidal antennas are determined based on the maximum size of the housing. The dual ellipsoidal antennas are mounted on a base plate, and the housing is adapted to the base plate and covers the upper side of the base plate, covering the outside of the dual ellipsoidal antennas. The dual ellipsoidal antennas include three types: a first auxiliary dual ellipsoidal antenna, a main control dual ellipsoidal antenna, and a second auxiliary dual ellipsoidal antenna. The main control dual ellipsoidal antenna is located in the middle of the housing, and the first and second auxiliary dual ellipsoidal antennas are located on both sides of the main control dual ellipsoidal antenna. The polarization mode and beam scanning range of the phased array antenna are determined by the main control dual ellipsoidal antenna, the feed phase of the first auxiliary dual ellipsoidal antenna is used as the reference phase, and the beams of the second auxiliary dual ellipsoidal antenna and the main control dual ellipsoidal antenna are combined. The phased array antenna simulation model is simulated to obtain the simulation parameters of the phased array antenna simulation model; Determine whether the simulation parameters meet the design specifications. If they do, then determine the basic simulation model of the phased array antenna.

2. The ellipsoidal phased array antenna design method according to claim 1, characterized in that, It also includes further optimizing the basic simulation model of the phased array antenna after determining the basic simulation model, to obtain the optimized simulation model of the phased array antenna.

3. The ellipsoidal phased array antenna design method according to claim 2, characterized in that, 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.

4. The ellipsoidal phased array antenna design method according to claim 3, characterized in that, Further optimization of the basic simulation model includes: increasing the size of the first and second sub-ellipsoids so that the minor axis lengths of the first and second sub-ellipsoids are adapted to the height of the shell; cutting off the parts of the first and second sub-ellipsoids that protrude from the shell along the major axis to form a cross-section, the cross-section being flush with the side of the shell to which it is tangent.

5. The ellipsoidal phased array antenna design method according to claim 4, characterized in that, Further optimization of the basic simulation model includes: the first sub-ellipsoid and / or the second sub-ellipsoid located at the diagonal of the base plate have two cross-sections, one of which is flush with the transverse side of the base plate, and the other of which is flush with the longitudinal side of the base plate.

6. The ellipsoidal phased array antenna design method according to claim 3, characterized in that, The first and second sub-ellipsoids are divided into two semi-ellipsoids, and a connecting seat is provided at the outer edge of the connection between the semi-ellipsoids.

7. The ellipsoidal phased array antenna design method according to claim 1, characterized in that, Further optimization of the basic simulation model includes: the first auxiliary dual-ellipsoidal antenna and the second auxiliary dual-ellipsoidal antenna are tilted on the base plate, each having a first preset angle with the base plate; the main control dual-ellipsoidal antenna is tilted in the middle of the base plate, having a second preset angle with the base plate, such that the second preset angle is greater than the first preset angle.

8. The ellipsoidal phased array antenna design method according to claim 1, characterized in that, Further optimization of the basic simulation model includes: determining the shortest distance between the first auxiliary dual-ellipsoidal antenna and the second auxiliary dual-ellipsoidal antenna and the main control dual-ellipsoidal antenna to be 0.3λ-0.6λ, where λ is the wavelength corresponding to the center frequency of the ellipsoidal phased array antenna.

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