Gain and Directional Compensation Method for Spaceborne Active Phased Array Antenna Structure Thermal Deformation

Abstract

The invention discloses a gain-and-direction-orientated structure thermal deformation compensation method for a satellite-borne active phase control array antenna. The method comprises the steps of determining structural parameters, material attributes and electromagnetic parameters of the antenna; determining antenna environment thermal load; calculating antenna temperature field distribution under sunshine; determining T / R assembly thermal power consumption; calculating antenna temperature field distribution under the T / R assembly thermal power consumption; performing temperature field superposition and calculating the thermal deformation of the antenna structure; extracting position offset in the array element geometric center; calculating the additional error of the array element space phase; determining the amplitude and phase distribution of array element excitation current; calculating the electrical performance of the antenna; judging whether gain and direction are both satisfied simultaneously or not; and calculating the antenna ideal main beam directed unit vector, the adjusting amount of the array element space phase, and the phase current of the compensated array element excitation current. The compensation method provided by the invention is combined with a phase adjusting method, so that the electrical performance compensation to the deformed satellite-borne active phase control array antenna is realized; the problem of antenna electrical performance degradation caused by structural thermal deformation is solved; and the normal operation of the antenna can be ensured.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a method for compensating thermal deformation of a space-borne active phased array antenna structure oriented to gain and direction. Background technique [0002] With the rapid development of space-borne antennas, the performance requirements for multi-function, multi-band, long-distance, and high-power antennas are getting higher and higher. Due to the increasing demand for satellite communication data transmission capacity, the original small-aperture low-gain antenna can no longer meet the application requirements. The use of space-borne active phased array antennas is one of the ways to solve the above problems. It serves as the "eyes" and "ears" of satellite systems such as space communication, electronic reconnaissance, navigation, and environmental monitoring. Independent control of multiple spot beams not only overcomes the problems of large inertia, slow s...

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Problems solved by technology

[0007] In view of the above problems, the present invention is based on the electromechanical coupling model of the spaceborne active phased array antenna, combined with the phase adjustment method, realizes the electrical performance compensation of the deformed spaceborne active phased array antenna, which can be used to solve the problems caused by environmental thermal load and device The deterioration of the electrical performance of the antenna caused by the thermal deformation of the structure caused by thermal power consumption, so as to ensure that the antenna can work normally in the service environment

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