Search

CN-116632508-B - Satellite configuration and switching method of multi-band planar phased array antenna

CN116632508BCN 116632508 BCN116632508 BCN 116632508BCN-116632508-B

Abstract

The invention provides a satellite configuration and a switching method of a multi-band planar phased array antenna, which comprises a satellite platform 1, a flat antenna group and a solar cell array 5, wherein the flat antenna group comprises a plurality of flat antennas with different frequency bands and is connected with a top plate of the satellite platform 1, the solar cell array 5 is connected with a bottom plate of the satellite platform 1, when in a transmitting state, the flat antennas with different frequency bands are folded and cling to a first side surface, the solar cell array 5 is folded and cling to a second side surface, when in a flying state, the flat antennas with different frequency bands are unfolded until the flat antennas with different frequency bands and the top plate of the satellite platform 1 are positioned on 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 positioned on the same plane. The satellite configuration of the invention has stable structure, can bear large-size and large-mass load, and has high adaptability to the existing satellite adopting the solar synchronous orbit and the low-inclination orbit and loading the flat plate type effective load.

Inventors

  • CHEN TING
  • CHEN GUOZHONG
  • CHEN ZHONGHUA
  • CHEN JUNLI
  • QIU JUN

Assignees

  • 上海卫星工程研究所

Dates

Publication Date
20260508
Application Date
20230425

Claims (8)

  1. 1. The satellite configuration of the multi-band planar phased array antenna is characterized by comprising a satellite platform (1), a flat antenna group and a solar cell array (5), wherein the flat antenna group comprises a plurality of flat antennas with different frequency bands, the flat antennas with different frequency bands are all connected with a top plate of the satellite platform (1), the solar cell array (5) is connected with a bottom plate of the satellite platform (1), and the satellite configuration of the multi-band planar phased array antenna comprises a flying state and a transmitting state; the satellite platform (1) is of a prismatic structure, the prismatic structure comprises a plurality of first side surfaces and a plurality of second side surfaces, and the first side surfaces and the second side surfaces are sequentially arranged at intervals; When the satellite configuration of the multi-band planar phased array antenna is in a transmitting state, the plurality of planar antennas with different frequency bands are folded and clung to the first side face, the solar cell array (5) is folded and clung to the second side face, and the planar antennas are arranged in one-to-one correspondence with the first side face; When the satellite configuration of the multi-band planar phased array antenna is in a flying state, the plurality of planar antennas with different frequency bands are unfolded until the plurality of planar antennas with different frequency bands and the top plate of the satellite platform (1) are positioned on 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 positioned on the same plane; The flat plate antennas of the plurality of different frequency bands are long plate structures with the sizes matched with the first side face; When the satellite configuration of the multi-band planar phased array antenna is in a transmitting state, the space angles between every two of the plurality of planar antennas with different frequency bands are the same and are respectively folded on the plurality of first side surfaces; the solar cell array (5) comprises a plurality of solar cell subarrays which are all of long plate structures with the sizes matched with the second side face, and the plurality of solar cell subarrays are all connected with the bottom plate of the satellite platform (1); When the satellite configuration of the multi-band planar phased array antenna is in a transmitting state, the plurality of solar cell subarrays are the same in interval angle between every two and are respectively folded on the plurality of second side surfaces, and the solar cell subarrays are in one-to-one correspondence with the second side surfaces; when the satellite configuration of the multi-band planar phased array antenna is in a flying state, the plurality of solar cell subarrays are unfolded until the plurality of solar cell subarrays and the bottom plate of the satellite platform (1) are located on the same plane.
  2. 2. The satellite configuration of the multi-band planar phased array antenna according to claim 1, wherein the satellite platform (1) is in a hexagonal prism structure, the plurality of different-band planar antennas comprise a first planar antenna (2), a second planar antenna (3) and a third planar antenna (4), and the solar cell array (5) comprises three solar cell subarrays; When the satellite configuration of the multi-band planar phased array antenna is in a transmitting state, angles among the first flat antenna (2), the second flat antenna (3) and the third flat antenna (4) are 120 degrees, and are respectively folded on three first side surfaces, and angles among the three solar cell subarrays are 120 degrees, and are respectively folded on three second side surfaces.
  3. 3. The satellite configuration of the multiband planar phased array antenna according to claim 1, further comprising a ground-to-ground data antenna (7), wherein the ground-to-ground data antenna (7) is mounted on a top plate of the satellite platform (1), and a normal direction of an antenna mounting surface of the ground-to-ground data antenna (7) is consistent with a normal direction of the top plate of the satellite platform (1); When the satellite configuration of the multi-band planar phased array antenna is in a flying state, the ground data transmission work is carried out on the ground data transmission antenna (7).
  4. 4. The satellite configuration of a multiband planar phased array antenna according to claim 1, further comprising a satellite-arrow connection ring, the satellite-arrow connection ring being arranged on a bottom plate of a satellite platform (1), the satellite platform (1) being connected to a launch vehicle through the satellite-arrow connection ring; A star sensor (6) is arranged in the star arrow connecting ring.
  5. 5. Satellite configuration for a multiband planar phased array antenna according to claim 1, further comprising a plurality of thrusters arranged on the side of the satellite platform (1).
  6. 6. The satellite configuration of the multiband planar phased array antenna according to claim 1, further comprising a plurality of measurement and control antennas (8), wherein the measurement and control antennas (8) 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 the measurement and control antennas (8) are arranged on the bottom plate of the satellite platform (1) along the normal direction of the bottom plate of the satellite platform (1).
  7. 7. A method for switching a multi-band planar phased array antenna, characterized in that a satellite configuration of the multi-band planar phased array antenna according to any one of claims 1 to 6 is adopted, and the satellite configuration of the multi-band planar phased array antenna is in a flying state, comprising the steps of: step 1, selecting a planar antenna of a target frequency band according to task requirements, and adjusting the attitude of a satellite configuration of the multi-band planar phased array antenna to enable the planar antenna of the target frequency band to start working and point to a flight direction; step 2, the satellite configuration of the multi-band planar phased array antenna adjusts the gesture around the rolling axis direction and carries out side view imaging left and right; step 3, after the imaging is completed, the flat antenna of the target frequency band stops working, and the solar cell array (5) orients the sun; Step 4, selecting a planar antenna of a target frequency band according to task requirements, wherein the satellite configuration of the multi-band planar phased array antenna is yawed around a yaw axis by a preset angle, so that the planar antenna of the target frequency band starts to work and points to a flight direction; step 5, repeating the step 2 and the step 3; step 6, returning to the step 4 or ending according to the task demand; the frequency bands of the planar antenna in the step 1 are different from those of the planar antenna in the step 4.
  8. 8. The switching method of the multi-band planar phased array antenna according to claim 7, wherein a coordinate system is established, a centroid of a satellite platform (1) is taken as an origin O, wherein a Z axis is perpendicular to a satellite-arrow separation plane and points to a top plate of the satellite platform (1), when a satellite configuration of the multi-band planar phased array antenna with an X axis pointing to the multi-band planar phased array antenna is in a transmitting state, a normal direction of the first planar antenna (2), a right-hand system is formed by a Y axis, the X axis and the Z axis, and a plane where a bottom plate of the satellite platform (1) is located is the satellite-arrow separation plane; In the step 1 and the step 4, the flight direction of the satellite configuration of the multi-band planar phased array antenna is parallel to the XOY plane, and when the planar antenna points to the flight direction, the long plate structure of the planar antenna forming the target band points to the flight direction, the rolling axis is the X axis, and the yaw axis is the Z axis.

Description

Satellite configuration and switching method of multi-band planar phased array antenna Technical Field The invention relates to the technical field of satellites, in particular to a satellite configuration and a switching method of a multi-band planar phased array antenna, and particularly relates to a satellite configuration and a switching method of a large-sized planar phased array antenna with multiple bands. Background The satellite loaded with the planar phased array antenna generally has the capability of penetrating cloud and fog and actively transmitting and receiving, can not be influenced by severe weather such as illumination conditions, cloud and rain and fog, has all-weather working conditions, and is one of the most effective means for coping with observation under severe weather conditions. However, the conventional satellite can only be carried with a planar phased array antenna with one frequency band, especially a ground observation satellite, and only can effectively observe a certain type of ground feature. With the increasing demand for dual-band or multi-band earth observation application satellites in recent years, the development of satellites with multiple bands is one of the problems to be solved in the current satellite application. The patent document with the publication number of CN107487460A discloses a remote sensing satellite configuration method suitable for various crossing points, which comprises the following steps of firstly folding a solar cell array on the flying direction surface of a star, secondly unfolding the solar cell array along the flying direction by means of a short connecting frame and the like. Aiming at the common situation that the load of a remote sensing satellite is mostly folded and folded on the side face of a star body in the flying direction, and combining the relationship between sunlight and satellite flying orbits, the invention provides a method for compressing a solar cell array on the flying side no matter how the intersection point is lowered, and realizes small swing expansion along the flying direction or 360-degree driving expansion along the vertical flying direction after the solar cell array is expanded in orbit by means of different long and short connecting frames and two driving mechanisms so as to adapt to the illumination requirements when various intersection point lowering places. However, the scheme can only carry a planar phased array antenna with one frequency band, and can only observe the characteristics of a certain type of ground feature. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a satellite configuration and a switching method of a multi-band planar phased array antenna. The satellite configuration of the multi-band planar phased array antenna comprises a satellite platform, a flat antenna group and a solar cell array, wherein the flat antenna group comprises a plurality of flat antennas with different frequency bands, the flat antennas with different frequency bands are all connected with a top plate of the satellite platform, the solar cell array is connected with a bottom plate of the satellite platform, and the satellite configuration of the multi-band planar phased array antenna comprises a flight state and a transmitting state; The satellite platform is of a prismatic structure, the prismatic structure comprises a plurality of first side surfaces and a plurality of second side surfaces, and the first side surfaces and the second side surfaces are sequentially arranged at intervals; When the satellite configuration of the multi-band planar phased array antenna is in a transmitting state, the plurality of planar antennas with different frequency bands are folded and clung to the first side face, the solar cell array is folded and clung to the second side face, and the planar antennas are arranged in one-to-one correspondence with the first side face; When the satellite configuration of the multi-band planar phased array antenna is in a flying state, the plurality of planar antennas with different frequency bands are unfolded until the plurality of planar antennas with different frequency bands and the top plate of the satellite platform are positioned on the same plane, and the solar cell array is unfolded until the solar cell array and the bottom plate of the satellite platform are positioned on the same plane. Preferably, the plurality of panel antennas with different frequency bands are all long panel structures with the sizes matched with the first side face; when the satellite configuration of the multi-band planar phased array antenna is in a transmitting state, the space angles between every two of the plurality of planar antennas with different frequency bands are the same and are respectively folded on the plurality of first side surfaces. Preferably, the solar cell array comprises a plurality of solar cell subarrays, the plurality of solar cell subarray