Model for Calculating Changes in the Radiation Pattern and Amplitude-Phase Distribution in the Subarray of a Large-Aperture APAA Based on a Modified Thermal Conductivity Equation

The paper describes a model for calculating and compensating for deviations in the amplitude-phase distribution and radiation pattern of a large-aperture active phased array antenna. As the basis of the mathematical model, a tandem thermal conductivity equation is formalized, which allows one to calculate deviations in phases and amplitudes when calculating the temperature distribution. The advantage of this model is the ability to calculate changes in the radiation pattern and amplitude-phase distribution for each receiving-transmitting module, and then convert them into changes for the entire array.