Title :
A NTFF transformation method in planar near-field antenna measurement derived from FDTD
Author :
Du Liuge ; Zhao Rui ; Chang Qinggong ; Wang Yahai
Author_Institution :
Sci. & Technol. on Electron. Test & Meas. Lab., Qingdao, China
Abstract :
Focusing on the requirement of planar near-field antenna measurement, a method usually used in finite difference time domain simulation which is based on the equivalence theorem is employed in the process of near-to-far-field transformation. The distribution of the far-field pattern is obtained directly in polar spherical coordinate system. A standard gain horn antenna is taken as an example for testing. Near-field data, which are derived from theoretical formula and from numerical simulation, are transformed by this method. The results are compared with others obtained by traditional method based on plane wave spectrum expansion, analytical theory and electromagnetic computation with FDTD method. Finally, this method is proved to be reliable.
Keywords :
antenna radiation patterns; finite difference time-domain analysis; horn antennas; NTFF transformation method; electromagnetic computation; equivalence theorem; far-field pattern; finite difference time domain simulation; near-field data; near-to-far-field transformation; numerical simulation; planar near-field antenna measurement; plane wave spectrum expansion; polar spherical coordinate system; standard gain horn antenna; Antenna measurements; Antenna theory; Apertures; Finite difference methods; Horn antennas; Magnetic field measurement; Time domain analysis;
Conference_Titel :
Antennas, Propagation & EM Theory (ISAPE), 2012 10th International Symposium on
Conference_Location :
Xian
Print_ISBN :
978-1-4673-1799-3
DOI :
10.1109/ISAPE.2012.6408718