In this paper we present some results of our research of high-frequency electromagnetic coupling to an electrically small axial dipole antenna inside a circular cylindrical cavity. This problem has many practical applications in EMC, e.g., for electronic equipment in aircraft or other aerial vehicles.To solve approximately the corresponding mathematical problem given by an integro-differential equation we used the so called Method of Small Antenna, developed earlier. The calculated input impedance of the antenna in the resonator and the calculated coefficients of the mutual coupling between two antennas are compared to those obtained from a full wave method (MLFMM) and show excellent agreement.
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