Background Electromagnetic coupling is a key link that governs the effect of the high-power microwave on drones. Efficient computation of electromagnetic coupling benefits the elucidation of the laws of electromagnetic coupling and the proposal of measures for coupling manipulation.
Purpose To achieve rapid evaluation of electromagnetic coupling for a quadcopter illuminated by an external antenna in scenarios where the coupling observation ports change frequently, a method combining the radiation impedance matrix with the extended random coupling model is presented.
Methods The involved model structurally consists of a transmitting horn antenna and a quadcopter positioned in the far-field region of the transmitting antenna. The quadcopter features coupling apertures and a coupling observation port. According to the extended random coupling model, a corresponding transmission-line equivalent model is established through the transmission matrix to obtain the cavity impedance and loss parameter necessary for the random coupling model.
Results Furthermore, the radiation impedance matrix is employed to calculate the probability density function of the induced voltage at the coupling observation port. The obtained results are in good agreement with the statistical results derived from the average impedance matrix and from full-wave simulations.
Conclusions Compared with the average impedance matrix, the radiation impedance matrix is temporally less expensive, thereby facilitating the rapid evaluation of electromagnetic coupling statistics for complex cavities using the extended random coupling model.
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