Experimental study on compensation of patterns in 3-element array sensor

摘要

In this report, a new measurement technique by using equally spaced dipole sensors is proposed to estimate undesired electromagnetic source location emitted from electronic equipments in a short time. A compensation method for array element pattern is also proposed. In 3-element array sensor, experimental values of the difference of the amplitude and phase between the received voltage of each array element and those of a single sensor placed at the same position of each array element of array sensor are obtained for the cases that the spacing between elements are 0.5 wavelength and 1 wavelength. Compensation factor obtained by experimental results is almost the same to that of numerical data except for the phase in center element. It is also shown that the received voltage after compensation using experimental data agree with the received voltage by scanning a single sensor within 0.2dB in amplitude and 1.6 degrees in phase.