Lightweight Design Method of Spaceborne Active Phased Array Antenna Structure Based on Electromechanical Coupling

Abstract

The invention discloses a satellite-bone active phased-array antenna structure lightweight design method based on electromechanical coupling.The method comprises the steps that antenna structure parameters, material properties, thermal parameters and electromagnetic parameters are determined; aluminum honeycomb physical property parameters and geometrical parameters are extracted; an antenna array element phase center is determined; an antenna thermal model is established, thermal loads and boundary conditions are exerted, and antenna temperature field distribution in a space environment is calculated; an antenna structure finite element model is established, temperature loads and structural constraint are exerted, and antenna array plane thermal deformation is calculated; array element phase center nodal displacement is extracted; an antenna radiation pattern is calculated based on an electromechanical coupling model, and a first side lobe level of a deformed antenna is calculated; whether the result is out of the tolerance range or not is judged; the aluminum honeycomb geometrical parameters are modified, and a satellite-bone active phased-array antenna lightweight structure scheme is obtained.According to the satellite-bone active phased-array antenna structure lightweight design method based on electromechanical coupling, mutual effects of a mechanical field, an electric field and a thermal field of the antenna are considered comprehensively, structure lightweight design is achieved on the premise that the electrical requirements of the antenna are guaranteed, and the method is used for guiding the satellite-bone active phased-array antenna structure design.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a lightweight design method for a space-borne active phased array antenna structure based on electromechanical coupling. The invention can be used to guide the structural design of the space-borne active phased array antenna, so that the space-borne active phased array antenna can realize light weight of the structure under the premise of meeting the electrical performance requirements. Background technique [0002] The active phased array antenna uses electricity to control the change of the antenna beam pointing, so as to scan the space. Compared with passive phased array antennas and reflector antennas, active phased array antennas overcome the obvious defects of large rotational inertia and slow scanning speed. Due to the increasing data transmission capacity required by satellite communication systems, the original small-aperture, low-gain antennas are no longer suitable f...

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Problems solved by technology

On the other hand, each radiator of the spaceborne active phased array antenna is equipped with a transmitting / receiving component (that is, a T / R component), so each antenna can transmit and receive electromagnetic waves. At the same time, because there are a large number of active devices in the antenna, the array surface of the spaceborne active phased array antenna will be deformed under the action of thermal load, which will affect the rigidity of the antenna structure and lead to the deterioration of the electrical performance of the antenna.

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