| （英） |
In this paper, we estimate radiation directivity and gain of a linear dipole array (LDA) and a linear patch array (LPA) antenna from one dimensional current distribution on the antennas. Assuming an antenna under test as a series of infinitesimal dipole elements, we calculate the radiation pattern as the sum of these elements. The LDA’s directivity and gain almost correspond to the theoretical values, and the LPA’s ones have sufficient accuracy near its main lobe. We also examine measurement conditions for the high estimation accuracy, and show that the sampling interval needs to be smaller than λ/16, the measurement distance between the antenna under test and a probe is smaller than 0.62a(a/λ)^(1/2) , where a is a single element size, and the measurement radius for horizontal plane is larger than 4λ. |