Satellite configuration and switching method of multi-band planar phased array antenna

Abstract

The application provides a satellite configuration and switching method of a multi-band planar phased array antenna, which comprises a satellite platform 1, a flat panel antenna group and a solar cell array 5, the flat panel antenna group comprises multiple flat panel antennas of different frequency bands and is connected to the top plate of the satellite platform 1, the solar cell array 5 is connected to the bottom plate of the satellite platform 1, when in a launching state, the multiple flat panel antennas of different frequency bands are all folded and close to the first side surface, and the solar cell array 5 is folded and close to the second side surface; when in a flying state, the multiple flat panel antennas of different frequency bands are all unfolded until the multiple flat panel antennas of different frequency bands and the top plate of the satellite platform 1 are located in the same plane, and the solar cell array 5 is unfolded until the solar cell array 5 and the bottom plate of the satellite platform 1 are located in the same plane. The satellite configuration has stable structure and can bear large-size and large-mass load, and has high adaptability to satellites with flat panel type effective load in the current sun-synchronous orbit and low-inclination orbit.

Description

Technical Field

[0001] This invention relates to the field of satellite technology, specifically to a satellite configuration and switching method for a multi-band planar phased array antenna, and more particularly to a satellite configuration and switching method for mounting a large multi-band planar phased array antenna. Background Technology

[0002] Satellites equipped with planar phased array antennas generally possess the ability to penetrate clouds and fog, and to actively transmit and receive data. They are unaffected by lighting conditions, cloud cover, rain, fog, or other adverse weather conditions, enabling all-weather, day-and-night operation. This makes them one of the most effective means of observation under adverse weather conditions. However, traditional satellites often only carry planar phased array antennas in one frequency band, especially Earth observation satellites, which can only effectively observe a specific type of ground feature. With the increasing demand for dual-frequency or multi-frequency Earth observation satellites in recent years, developing multi-frequency satellites has become one of the most pressing issues to be addressed in current satellite applications.

[0003] Patent document CN107487460A discloses a method for configuring remote sensing satellites to adapt to various descending node local times. The method includes the following steps: Step 1, folding the solar array along the flight direction of the satellite; Step 2, deploying the solar array along the flight direction using a short connecting frame, etc. This invention can meet the user's needs for new descending node local times with minimal cost, creating possibilities for industrial-scale production and early stockpiling. Addressing the common situation where remote sensing satellite payloads are mostly folded and folded along the side of the satellite in the flight direction, and considering the relationship between sunlight and satellite orbit, this invention proposes to keep the solar array pressed against the flight side regardless of the descending node local time. By using different length connecting frames and switching between two drive mechanisms, the solar array can be deployed in orbit and then either oscillate slightly along the flight direction or be driven 360° perpendicular to the flight direction to adapt to the illumination requirements of various descending node local times. However, this solution can only carry a planar phased array antenna in one frequency band and can only observe a certain type of ground feature. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a satellite configuration and switching method for a multi-band planar phased array antenna.

[0005] The satellite configuration of the multi-band planar phased array antenna provided by the present invention includes a satellite platform, a flat panel antenna group and a solar cell array. The flat panel antenna group includes multiple flat panel antennas of different frequency bands. The multiple flat panel antennas of different frequency bands are all connected to the top plate of the satellite platform. The solar cell array is connected to the bottom plate of the satellite platform. The satellite configuration of the multi-band planar phased array antenna includes a flight state and a transmission state.

[0006] The satellite platform is a prism structure, which includes multiple first sides and multiple second sides, with the first sides and second sides arranged alternately in sequence.

[0007] When the satellite configuration of the multi-band planar phased array antenna is in the transmission state, the multiple flat panel antennas of different frequency bands are all retracted and tightly attached to the first side, the solar cell array is retracted and tightly attached to the second side, and the flat panel antennas are arranged one-to-one with the first side.

[0008] When the satellite configuration of the multi-band planar phased array antenna is in flight, all the multiple planar antennas of different frequency bands are deployed until the multiple planar antennas of different frequency bands are on the same plane as the top plate of the satellite platform, and the solar cell array is deployed until the solar cell array is on the same plane as the bottom plate of the satellite platform.

[0009] Preferably, the multiple flat panel antennas of different frequency bands are all long plate structures with dimensions matching the first side surface;

[0010] When the satellite configuration of the multi-band planar phased array antenna is in the transmission state, the multiple planar antennas of different frequency bands are spaced at the same angle and are respectively gathered on multiple first sides.

[0011] Preferably, the solar cell array includes multiple solar cell subarrays, each of which is a long plate structure with dimensions matching the second side, and each of the multiple solar cell subarrays is connected to the base plate of the satellite platform;

[0012] When the satellite configuration of the multi-band planar phased array antenna is in the transmission state, the multiple solar cell subarrays are spaced at the same angle and are respectively gathered on multiple second sides, and the solar cell subarrays are arranged in a one-to-one correspondence with the second sides;

[0013] When the satellite configuration of the multi-band planar phased array antenna is in flight, all the multiple solar cell subarrays are deployed until they are on the same plane as the base plate of the satellite platform.

[0014] Preferably, the satellite platform has a hexagonal prism structure, the multiple flat panel antennas of different frequency bands include a first flat panel antenna, a second flat panel antenna and a third flat panel antenna, and the solar cell array includes three solar cell subarrays;

[0015] When the satellite configuration of the multi-band planar phased array antenna is in the transmission state, the first flat panel antenna, the second flat panel antenna, and the third flat panel antenna are set at an angle of 120° and are respectively gathered on the three first sides, and the three solar cell subarrays are set at an angle of 120° and are respectively gathered on the three second sides.

[0016] Preferably, it also includes a ground-to-ground data transmission antenna, which is mounted on the top plate of the satellite platform, and the normal of the antenna mounting surface of the ground-to-ground data transmission antenna is consistent with the normal of the top plate of the satellite platform;

[0017] When the satellite configuration of the multi-band planar phased array antenna is in flight, the ground data transmission antenna performs ground data transmission.

[0018] Preferably, it also includes a satellite-rocket connection ring, which is mounted on the base plate of the satellite platform, and the satellite platform is connected to the launch vehicle through the satellite-rocket connection ring;

[0019] A star sensor is installed inside the star-rocket connecting ring.

[0020] Preferably, the system also includes multiple thrusters, which are disposed on the side of the satellite platform.

[0021] Preferably, the system further includes multiple telemetry and control antennas, which are arranged on the top plate of the satellite platform along the normal direction of the top plate and on the bottom plate of the satellite platform along the normal direction of the bottom plate.

[0022] The switching method for a multi-band planar phased array antenna according to the present invention, employing the satellite configuration of the multi-band planar phased array antenna, wherein the satellite configuration of the multi-band planar phased array antenna is in flight, includes the following steps:

[0023] Step 1: Select the flat panel antenna for the target frequency band according to the mission requirements. Adjust the satellite configuration of the multi-band planar phased array antenna to make the flat panel antenna for the target frequency band start working and point in the flight direction.

[0024] Step 2: The satellite configuration of the multi-band planar phased array antenna is adjusted around the roll axis and left and right side view imaging is performed;

[0025] Step 3: After imaging is completed, the flat panel antenna in the target frequency band stops working, and the solar array is oriented towards the sun;

[0026] Step 4: Select the flat panel antenna for the target frequency band according to the mission requirements. The satellite configuration of the multi-band planar phased array antenna is yawed around the yaw axis by a preset angle so that the flat panel antenna for the target frequency band starts working and points in the flight direction.

[0027] Step 5: Repeat steps 2 and 3;

[0028] Step 6: Depending on the task requirements, return to step 4 or end the process.

[0029] The frequency band of the flat panel antenna in step 1 is different from that in step 4.

[0030] Preferably, a coordinate system is established with the center of mass of the satellite platform as the origin O. The Z-axis is perpendicular to the satellite-rocket separation surface and points to the top plate of the satellite platform. The X-axis points to the normal of the first flat panel antenna when the satellite configuration with the multi-band planar phased array antenna is in the launch state. The Y-axis forms a right-handed system with the X-axis and Z-axis. The plane on which the bottom plate of the satellite platform is located is the satellite-rocket separation surface.

[0031] In steps 1 and 4, the flight direction of the satellite configuration of the multi-band planar phased array antenna is parallel to the XOY plane. When the flat panel antenna points to the flight direction, the long plate structure of the flat panel antenna of the target frequency band points to the flight direction. The rolling axis is the X-axis and the yaw axis is the Z-axis.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. This invention has a simple structure and is easy to operate. The satellite configuration is structurally stable and can carry large-size and high-mass payloads. It is highly adaptable to satellites currently using sun-synchronous orbits and low-inclination orbits to carry planar payloads. Furthermore, it uses a yaw axis angle switching method to meet the on-orbit application requirements of planar phased array antennas in different frequency bands. The design logic is clear, the method is simple and feasible, and it is easy to operate and implement. In particular, it can be extended to the situation of parallel development of multiple satellites, which can effectively reduce the satellite launch and networking cycle.

[0034] 2. This invention employs a deployable solar array structure, which reduces the system complexity of the solar array and improves the reliability of the satellite.

[0035] 3. This invention employs high-precision design techniques for star sensors, ground data transmission antennas, and telemetry and control antennas to meet the flight requirements of high-precision antenna pointing control, ground data transmission, and satellite-to-ground telemetry and control during satellite flight. Attached Figure Description

[0036] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0037] Figure 1 This is a schematic diagram of the satellite configuration of the multi-band planar phased array antenna in this invention in flight mode;

[0038] Figure 2 This is a schematic diagram of the satellite configuration of the multi-band planar phased array antenna in the present invention in the transmission state;

[0039] Figure 3 This is a flowchart illustrating the steps of the switching method for a multi-band planar phased array antenna in this invention.

[0040] The diagram shows:

[0041] Satellite Platform 1 Solar Cell Array 5

[0042] First flat panel antenna 2 Star sensor 6

[0043] Second flat panel antenna 3, ground-to-ground data transmission antenna 7

[0044] Third flat panel antenna 4, measurement and control antenna 8 Detailed Implementation

[0045] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0046] This invention discloses a satellite configuration and switching method for a multi-band planar phased array antenna. The satellite configuration provided by this invention is structurally stable and can carry large-size and high-mass payloads. It has high adaptability to satellites currently using sun-synchronous orbits and low-inclination orbits to carry planar payloads. Furthermore, it adopts a yaw axis angle switching method to meet the on-orbit application requirements of planar phased array antennas in different frequency bands. The design logic is clear, the method is simple and feasible, and it is easy to operate and implement. In particular, it can be extended to the situation of parallel development of multiple satellites, which can effectively reduce the satellite launch and networking cycle.

[0047] The satellite configuration of the multi-band planar phased array antenna provided by the present invention, such as Figure 1 , Figure 2 As shown, the system includes a satellite platform 1, a flat panel antenna array, and a solar array 5. The flat panel antenna array includes multiple flat panel antennas of different frequency bands, all of which are connected to the top plate of the satellite platform 1. The solar array 5 is connected to the bottom plate of the satellite platform 1. The satellite configuration of the multi-band planar phased array antenna includes flight and launch states. The satellite platform 1 has a prism structure, which includes a first side and a second side, which are arranged adjacent to each other. The satellite configuration of the multi-band planar phased array antenna... When in the launch state, the multiple planar antennas of different frequency bands are all retracted and close to the first side, and the solar cell array 5 is retracted and close to the second side. At this time, the planar antennas and the solar cell array 5 are staggered. When the satellite configuration of the multi-band planar phased array antenna is in flight, the multiple planar antennas of different frequency bands are all deployed until the multiple planar antennas of different frequency bands are on the same plane as the top plate of the satellite platform 1, and the solar cell array 5 is deployed until the solar cell array 5 is on the same plane as the bottom plate of the satellite platform 1.

[0048] For ease of explanation, we first establish the satellite's layout coordinate system (O-XYZ), defined as follows:

[0049] With the center of mass of satellite platform 1 as the origin O, where:

[0050] The Z-axis is perpendicular to the star-rocket separation surface and points towards the top plate of satellite platform 1;

[0051] When the satellite configuration with the X-axis pointing to the multi-band planar phased array antenna is in the transmission state, the normal of the first planar antenna 2;

[0052] The Y-axis forms a right-handed relationship with the X-axis and Z-axis, and the plane where the base plate of the satellite platform 1 is located is the star-rocket separation surface;

[0053] like Figure 1 , Figure 2 As shown, the multiple planar antennas of different frequency bands are all long plate structures with dimensions matching the first side. When the satellite configuration of the multi-band planar phased array antenna is in the transmission state, the multiple planar antennas of different frequency bands are at the same angle to each other and are respectively folded into multiple first side panels, with each planar antenna corresponding to one of the first side panels. The solar cell array 5 includes multiple solar cell subarrays, each of which is a long plate structure with dimensions matching the second side panel. The multiple solar cell subarrays are all connected to the base plate of the satellite platform 1. When the satellite configuration of the multi-band planar phased array antenna is in the transmission state, the multiple solar cell subarrays are at the same angle to each other and are respectively folded into multiple second side panels, with each solar cell subarray corresponding to one of the second side panels. When the satellite configuration of the multi-band planar phased array antenna is in flight state, the multiple solar cell subarrays are all deployed until they are on the same plane as the base plate of the satellite platform 1. The solar cell array 5 is normally oriented towards the sun to provide energy support for the satellite.

[0054] Preferably, the satellite platform 1 has a hexagonal prism structure, and the multiple planar antennas of different frequency bands include a first planar antenna 2, a second planar antenna 3, and a third planar antenna 4. The solar cell array 5 includes three solar cell subarrays. When the satellite configuration of the multi-band planar phased array antenna is in the transmission state, the first planar antenna 2, the second planar antenna 3, and the third planar antenna 4 are set at an angle of 120° and are respectively gathered on three first sides. The three solar cell subarrays are set at an angle of 120° and are respectively gathered on three second sides. When the satellite configuration of the multi-band planar phased array antenna is in flight, all three planar antennas are deployed. Specifically, all three planar antennas are rotatably connected to the top plate of the satellite platform 1. During deployment, the outer ends of the planar antennas move in the positive direction along the Z-axis until the planar antennas and the top plate of the satellite platform 1 are on the same plane. At this time, the planar antennas have rotated 90° compared to when they are folded up. The three solar cell subarrays are also deployed. Specifically, all three solar cell subarrays are rotatably connected to the bottom plate of the satellite platform 1. During deployment, the outer ends of the solar cell subarrays move in the opposite direction along the Z-axis until the solar cell subarrays and the bottom plate of the satellite platform 1 are on the same plane. At this time, the solar cell subarrays have rotated 90° compared to when they are folded up.

[0055] The satellite configuration of the multi-band planar phased array antenna also includes a ground-to-ground data transmission antenna 7. The ground-to-ground data transmission antenna 7 is mounted on the top plate of the satellite platform 1, and the normal of the antenna mounting surface of the ground-to-ground data transmission antenna 7 is aligned with the normal of the top plate of the satellite platform 1. When the satellite configuration of the multi-band planar phased array antenna is in flight, the ground-to-ground data transmission antenna 7 performs ground data transmission. Preferably, the ground-to-ground data transmission antenna 7 adopts a phased array system.

[0056] The satellite configuration of the multi-band planar phased array antenna also includes a satellite-launcher connection ring, which is mounted on the base plate of the satellite platform 1. The satellite platform 1 is connected to the launch vehicle via the satellite-launcher connection ring. A star sensor 6 is installed inside the satellite-launcher connection ring. The satellite configuration of the multi-band planar phased array antenna also includes multiple thrusters, which are mounted on the sides of the satellite platform 1. These thrusters provide the satellite with rapid switching around its yaw axis and orbit maintenance and control functions. The satellite configuration of the multi-band planar phased array antenna also includes multiple telemetry and control antennas 8, which are mounted on the top plate of the satellite platform 1 along the normal direction, and on the base plate of the satellite platform 1 along the normal direction.

[0057] According to the switching method for a multi-band planar phased array antenna provided by the present invention, the satellite configuration of the multi-band planar phased array antenna is adopted. This satellite configuration allows for the selection of a planar antenna in the target frequency band based on mission requirements. The direction of the planar antenna in the target frequency band is parallel to the flight direction. The switching method includes the following steps:

[0058] Step 1: The satellite configuration of the multi-band planar phased array antenna enters the flight state. According to the mission requirements, the target frequency band flat panel antenna is selected. The satellite configuration of the multi-band planar phased array antenna adjusts its attitude so that the target frequency band flat panel antenna starts working and points in the flight direction.

[0059] Step 2: The satellite configuration of the multi-band planar phased array antenna is adjusted in attitude around the roll axis and side-view imaging is performed, where the roll axis is the X-axis;

[0060] Step 3: After imaging is completed, the flat panel antenna in the target frequency band stops working, and the solar array 3 is oriented towards the sun;

[0061] Step 4: Select the flat panel antenna for the target frequency band according to the mission requirements. The satellite configuration of the multi-band planar phased array antenna is yawed by a preset angle around the yaw axis so that the flat panel antenna of the target frequency band starts working and points in the flight direction. The yaw axis is the Z-axis.

[0062] Step 5: Repeat steps 2 and 3. Specifically, the satellite configuration of the multi-band planar phased array antenna is adjusted around the roll axis and the image is viewed from the left and right sides again. After the imaging is completed, the flat panel antenna of the target frequency band stops working and the solar cell array 3 is oriented towards the sun.

[0063] Step 6: The satellite configuration of the multi-band planar phased array antenna can be adjusted according to mission requirements, returning to step 4 or ending the process.

[0064] The frequency bands of the flat panel antennas in steps 1 and 4 are different. In steps 1 and 4, the flight direction of the satellite configuration of the multi-band planar phased array antenna is parallel to the XOY plane. When the flat panel antenna points to the flight direction, the long plate structure of the flat panel antenna of the target frequency band points to the flight direction.

[0065] Example 1:

[0066] To address the limitation of current planar phased array antennas having a single payload frequency, this embodiment provides a satellite configuration for mounting a large multi-band planar phased array antenna. This effectively solves the application requirements for carrying multi-band payloads. Considering the operational characteristics of planar antennas in sun-synchronous orbits and low-inclination orbits, this embodiment mounts three frequency bands of planar antennas at a uniform 120° angle on the same satellite platform 1. By employing a time-division multiplexing method where the satellite platform 1 switches attitudes around its yaw axis, the three types of planar antennas on the satellite can operate in a time-division multiplexing fashion, thus fulfilling the application requirements of multi-band satellites. Through high-precision design of the star sensor 6, the ground data transmission antenna 7, and the telemetry and control antenna 8, the satellite's mission requirements for high-precision antenna pointing control, ground data transmission, and satellite-to-ground telemetry and control during on-orbit flight are met.

[0067] The satellite carries three planar payloads: a first planar antenna 2, a second planar antenna 3, and a third planar antenna 4. These three antennas, each with a 5.4m × 1.2m aperture, operate at three different microwave frequencies. During launch, the three antennas are positioned at 120° intervals between each other and are pressed firmly against the three sides of the satellite platform 1. After launch and orbit insertion, the three planar antennas expand 90° in the Z-axis direction, with the antenna array normal aligning with the normal of the top plate of the satellite platform 1. Since the fairing of the launch vehicle used to launch the satellite requires a satellite envelope of less than 2900mm and a column section length of only 6000mm, mounting the three planar antennas on the sides of the satellite platform 1 fully utilizes the column section space of the launch vehicle fairing.

[0068] To meet the energy requirements for launching the planar payload antenna, a 20.4㎡ solar array 5 is needed. Considering satellite configuration and attitude control requirements, a configuration scheme is adopted in which the solar array 5 is arranged on the Z-side of the satellite platform 1. In the launch state, the solar array 5 is divided into three sub-arrays arranged in a "I" shape and pressed firmly onto the side plate of the satellite platform 1. The solar array 5 is oriented towards the sun through satellite attitude control, ensuring the energy requirements for satellite operation.

[0069] To meet satellite launch requirements, the 20.4㎡ solar array 5 is designed in a "V"-shaped planar configuration. During launch, the arrays are aligned 120° apart and pressed against the other three sides of satellite platform 1. After the satellite is launched into orbit, the three solar array subarrays unfold 90° in the Z-axis direction, with the surface of solar array 5 aligned with the Z-normal of the satellite platform 1's base plate. Normally, solar array 5 is sun-oriented to provide energy support for the satellite.

[0070] To meet the installation requirements of the payload, solar array 5, and onboard equipment, as well as the satellite launch requirements, satellite platform 1 is designed as a hexagonal prism structure. To meet launch requirements, the -Z plane of satellite platform 1 is designed as the satellite-rocket separation surface, and it is connected to the launch vehicle using a standard Φ973 satellite-rocket connection ring. The satellite's individual equipment is installed inside satellite platform 1, meeting the installation and operating temperature requirements for launch and on-orbit operation.

[0071] To ensure the pointing accuracy of the planar payload antenna and precisely determine the satellite's attitude, the star sensor 6 is a high-precision star sensor used to determine the satellite's attitude. Two star sensors 6 are arranged within the star-rocket connection ring on the Z side of the satellite platform 1's base plate, with a field of view that meets the satellite's operational requirements. This design not only provides a comfortable mechanical environment for the star sensor 6 but also eliminates on-orbit thermal deformation errors, effectively ensuring the pointing accuracy and stability of the planar antenna and other payloads during on-orbit operation.

[0072] To meet the satellite's Earth-to-ground data transmission requirements, the satellite employs a phased array Earth-to-ground data transmission antenna 7. The normals of the antenna arrays of the first flat panel antenna 2, the second flat panel antenna 3, and the third flat panel antenna 4 are aligned during flight. Earth-to-ground data transmission occurs when the normals of these antennas point to +Z. Mounting the Earth-to-ground data transmission antenna 7 on the top plate of the satellite platform 1 satisfies the heat dissipation requirements of the antenna during on-orbit operation.

[0073] To meet the satellite telemetry and control requirements, two telemetry and control antennas 8 are arranged in the ground-facing and two in the sky-facing directions, respectively mounted on the +Z and -Z planes of the satellite platform 1 via brackets. This design effectively meets the field-of-view requirements of the telemetry and control antennas 8 on the satellite and the function of omnidirectional communication; alternatively, the satellite can use two sets of telemetry and control antennas 8, arranged in the sky and ground-facing directions respectively, with each set consisting of one antenna, to achieve omnidirectional satellite telemetry and control functions.

[0074] To meet the needs of switching between flat panel antennas and adjusting orbits during satellite flight, four thrusters 9 are installed in the middle of the satellite platform 1, on the ±X side. That is, two thrusters are arranged on each of the two sides of the satellite platform 1 parallel to the YOZ plane, with the thrust direction pointing towards the ±X side. This provides the satellite's first flat panel antenna 2, second flat panel antenna 3, and third flat panel antenna 4 with rapid switching around the yaw axis and orbit maintenance and control functions.

[0075] Example 2:

[0076] This embodiment provides a switching method for a three-band planar phased array antenna, including a switching method for a first planar antenna 2, a second planar antenna 3, and a third planar antenna 4, comprising the following steps:

[0077] Step 1: Adjust the attitude of the satellite configuration of the multi-band planar phased array antenna so that the first flat panel antenna 2 starts working and points to the flight direction. At this time, the length direction of the long plate structure that makes up the first flat panel antenna 2 points to the flight direction.

[0078] Step 2: The satellite configuration of the multi-band planar phased array antenna is adjusted in attitude around the roll axis and side-view imaging is performed, where the roll axis is the X-axis;

[0079] Step 3: After imaging is completed, the first flat panel antenna 2 stops working, and the solar cell array 3 is oriented towards the sun;

[0080] Step 4: The satellite configuration of the multi-band planar phased array antenna yaws 120° around the yaw axis, so that the second flat panel antenna 3 starts to work and points to the flight direction. At this time, the length direction of the long plate structure that makes up the second flat panel antenna 3 points to the flight direction.

[0081] Step 5: The satellite configuration of the multi-band planar phased array antenna is adjusted in attitude around the roll axis and side-view imaging is performed, where the roll axis is the X-axis;

[0082] Step 6: After imaging is completed, the second flat panel antenna 3 stops working, and the solar cell array 3 is oriented towards the sun;

[0083] Step 7: The satellite configuration of the multi-band planar phased array antenna yaws 120° around the yaw axis, so that the third flat panel antenna 4 starts to work and points to the flight direction. At this time, the length direction of the long plate structure that makes up the third flat panel antenna 4 points to the flight direction.

[0084] Step 8: The satellite configuration of the multi-band planar phased array antenna is adjusted in attitude around the roll axis and side-view imaging is performed, where the roll axis is the X-axis;

[0085] Step 9: After imaging is completed, the third flat panel antenna 4 stops working, and the solar cell array 3 is oriented towards the sun;

[0086] Step 10: Based on the satellite mission requirements, return to Step 1, Step 4, or Step 7.

[0087] This invention provides a satellite configuration for mounting a large planar phased array antenna with multiple frequency bands, which meets the installation requirements of satellite launch, antenna installation, instruments such as sensors, and cabin equipment. It can meet the usage requirements of antennas for attitude and orbit control, thermal control, data transmission, and telemetry and control, and has a wide range of application and promotion value.

[0088] This invention provides a new design method for the overall configuration and switching technology of satellites that will subsequently launch multi-band planar phased array antennas in my country. In particular, it has become the preferred design method for satellites that use multiple large flat panel antennas mounted on the satellite. This invention will have wide applications in the field.

[0089] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0090] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A satellite configuration for a multi-band planar phased array antenna, characterized in that, The satellite includes a satellite platform (1), a flat panel antenna group and a solar cell array (5). The flat panel antenna group includes multiple flat panel antennas of different frequency bands. The multiple flat panel antennas of different frequency bands are all connected to the top plate of the satellite platform (1). The solar cell array (5) is connected to the bottom plate of the satellite platform (1). The satellite configuration of the multi-band planar phased array antenna includes flight state and launch state. The satellite platform (1) is a prism structure, which includes multiple first sides and multiple second sides, with the first sides and second sides arranged alternately in sequence. When the satellite configuration of the multi-band planar phased array antenna is in the transmission state, the multiple flat panel antennas of different frequency bands are all retracted and close to the first side, the solar cell array (5) is retracted and close to the second side, and the flat panel antennas are set one-to-one with the first side. When the satellite configuration of the multi-band planar phased array antenna is in flight, the multiple flat panel antennas of different frequency bands are deployed until the multiple flat panel antennas of different frequency bands are on the same plane as the top plate of the satellite platform (1), and the solar cell array (5) is deployed until the solar cell array (5) is on the same plane as the bottom plate of the satellite platform (1). The multiple flat panel antennas of different frequency bands are all long plate structures with dimensions matching the first side; When the satellite configuration of the multi-band planar phased array antenna is in the transmission state, the multiple planar antennas of different frequency bands are spaced at the same angle and are respectively gathered on multiple first sides. The solar cell array (5) includes multiple solar cell subarrays, each of which is a long plate structure with dimensions matching the second side, and each of the multiple solar cell subarrays is connected to the base plate of the satellite platform (1). When the satellite configuration of the multi-band planar phased array antenna is in the transmission state, the multiple solar cell subarrays are spaced at the same angle and are respectively gathered on multiple second sides, and the solar cell subarrays are arranged in a one-to-one correspondence with the second sides; When the satellite configuration of the multi-band planar phased array antenna is in flight, all the multiple solar cell subarrays are deployed until they are on the same plane as the base plate of the satellite platform (1).

2. The satellite configuration of the multi-band planar phased array antenna according to claim 1, characterized in that, The satellite platform (1) has a hexagonal prism structure. The multiple flat panel antennas of different frequency bands include a first flat panel antenna (2), a second flat panel antenna (3), and a third flat panel antenna (4). The solar cell array (5) includes three solar cell subarrays. When the satellite configuration of the multi-band planar phased array antenna is in the launch state, the first flat panel antenna (2), the second flat panel antenna (3) and the third flat panel antenna (4) are set at an angle of 120° and are respectively gathered on the three first sides, and the three solar cell subarrays are set at an angle of 120° and are respectively gathered on the three second sides.

3. The satellite configuration of the multi-band planar phased array antenna according to claim 1, characterized in that, It also includes a ground-to-ground data transmission antenna (7), which is installed on the top plate of the satellite platform (1), and the normal of the antenna mounting surface of the ground-to-ground data transmission antenna (7) is consistent with the normal of the top plate of the satellite platform (1); When the satellite configuration of the multi-band planar phased array antenna is in flight, the ground data transmission antenna (7) performs ground data transmission.

4. The satellite configuration of the multi-band planar phased array antenna according to claim 1, characterized in that, It also includes a star-rocket connection ring, which is set on the base plate of the satellite platform (1), and the satellite platform (1) is connected to the launch vehicle through the star-rocket connection ring; A star sensor (6) is installed inside the star-rocket connecting ring.

5. The satellite configuration of the multi-band planar phased array antenna according to claim 1, characterized in that, It also includes multiple thrusters, which are located on the side of the satellite platform (1).

6. The satellite configuration of the multi-band planar phased array antenna according to claim 1, characterized in that, It also includes multiple telemetry and control antennas (8), which are arranged on the top plate of the satellite platform (1) along the normal direction of the top plate of the satellite platform (1) and on the bottom plate of the satellite platform (1) along the normal direction of the bottom plate of the satellite platform (1).

7. A switching method for a multi-band planar phased array antenna, characterized in that, A satellite configuration employing any one of claims 1-6, wherein the satellite configuration of the multi-band planar phased array antenna is in flight, comprises the following steps: Step 1: Select the flat panel antenna for the target frequency band according to the mission requirements. Adjust the satellite configuration of the multi-band planar phased array antenna to make the flat panel antenna for the target frequency band start working and point in the flight direction. Step 2: The satellite configuration of the multi-band planar phased array antenna is adjusted around the roll axis and left and right side view imaging is performed; Step 3: After imaging is completed, the flat panel antenna in the target frequency band stops working, and the solar cell array (5) is oriented towards the sun; Step 4: Select the flat panel antenna for the target frequency band according to the mission requirements. The satellite configuration of the multi-band planar phased array antenna is yawed around the yaw axis by a preset angle so that the flat panel antenna for the target frequency band starts working and points in the flight direction. Step 5: Repeat steps 2 and 3; Step 6: Depending on the task requirements, return to step 4 or end the process; The frequency band of the flat panel antenna in step 1 is different from that in step 4.

8. The switching method for a multi-band planar phased array antenna according to claim 7, characterized in that, Establish a coordinate system with the center of mass of the satellite platform (1) as the origin O. The Z-axis is perpendicular to the star-rocket separation surface and points to the top plate of the satellite platform (1). The X-axis points to the normal of the first flat panel antenna (2) when the satellite configuration of the multi-band planar phased array antenna is in the launch state. The Y-axis forms a right-handed system with the X-axis and Z-axis. The plane where the bottom plate of the satellite platform (1) is located is the star-rocket separation surface. In steps 1 and 4, the flight direction of the satellite configuration of the multi-band planar phased array antenna is parallel to the XOY plane. When the flat panel antenna points to the flight direction, the long plate structure of the flat panel antenna that makes up the target frequency band points to the flight direction. The rolling axis is the X-axis and the yaw axis is the Z-axis.

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