ELECTRIC FIELD STRENGTH SIMULATION METHOD FOR LOOP ANTENNA, LOOP ANTENNA AND LOOP ANTENNA FORMING METHOD

摘要

PROBLEM TO BE SOLVED: To provide the electric field strength simulation method of a loop antenna on a plane by obtaining the vertical magnetic field of an optional point based on a specified formula, performing coordinate transformation from a polar coordinate to a three-dimensional coordinate and performing line integration by a linear antenna. ;SOLUTION: Magnetic field strength on an antenna line circumference at a point P is indicated by the basic formula of a fine dipole antenna by the expression of the polar coordinate P (R, θ, ϕ). Based on the formula, the vertical magnetic field to an antenna plane at the optional point P generated by a rectangular loop antenna is obtained, the coordinate transformation is performed from the polar coordinate P (R, θ, ϕ) to the three-dimensional coordinate (X, Y, Z) composed of X, Y and Z axes and the line integration by the linear antenna is performed. Such a program is inputted to a calculation processor and simulation characteristics are obtained. In the formula, Hϕ is the magnetic field of a line circumferential direction, ω is a frequency, P is electric charge moment, Q is an electric charge, R is a distance to an observation point, (l) is the dipole distance of the electric charge, θ is the angle of the line and the observation point, (i) is a current and e^-jkR is a constant for indicating a phase angle.;COPYRIGHT: (C)1999,JPO