High Frequency Surface Current and Charge Densities Induced on Aircraft by a Plane Electromagnetic Wave.

摘要

Surface current and charge densities induced on aircraft fuselage by an electromagnetic plane wave of arbitrary incidence at high frequencies is the object of this research. The primary goal of this investigation is to develop a theoretical solution for predicting the induced surface and charge densities on aircraft fuselage in an accurate and efficient manner. Since it is a study of general-type aircraft, the aircraft is modeled in its most basic form. The fuselage is assumed to be an infinitely long, perfectly conducting elliptic cylinder in its cross-section and a composite elliptic cylinder in its elevation profile. The wing, cockpit, stabilizers (horizontal and vertical) and landing gear are modeled by n sided bent or flat plates which can be arbitrarily attached to the fuselage. The solution developed in this study utilizes two elliptic cylinders, namely, the roll plane and elevation plane models to approximate the principal surface profile (longitudinal and transverse) at the observation location. With the belt concept and the aid of appropriate coordinate system transformations the solution can be used to predict the surface current and charge densities induced on the fuselage in an accurate and efficient manner. The radiation patterns due to infinitesimal monopole and slot antennas on aircraft are related to the surface current and charge densities induced on the antenna location via the reciprocity theorem. (Author)