Simultaneous measurement of radiation pattern by modulated scattering element array

A simultaneous measurement method using the modulated scattering element array is proposed to measure the electromagnetic radiation which is instant and irregular. Each modulated scattering element (MSE) is excited by a local signal with different frequency, so that the received IF signal contains different frequency components which indicates the relative magnitude of the RF signal at positions of the MSEs, and all of the IF components are measured simultaneously by the broadband microwave receiver. Radiation pattern of a 2-element quarter wavelength monopole array is measured for evaluating the performance of the measurement method. It is found that good agreement of the measurement results is obtained between the present measurement and the conventional method.