Title :
A note on the criteria for the far zone in the time-domain analysis of antennas
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
The basic traveling-wave element is considered as a model for an antenna radiating a pulse. The exact expressions for the electromagnetic field of the element throughout all space are used to obtain power series for the field in the variable h/r<1, where h is the length of the element and r is the distance from the element. These series are then used to develop criteria for estimating when the distance from the element is sufficient for the field to be a good approximation to the far-zone field.
Keywords :
antenna radiation patterns; electromagnetic pulse; time-domain analysis; antenna pulse radiation; electromagnetic field; time-domain analysis; traveling-wave element; Antenna accessories; Antenna measurements; Antenna theory; Aperture antennas; Dipole antennas; Electromagnetic fields; Frequency domain analysis; Frequency estimation; Optical propagation; Time domain analysis; Far-zone field; time domain;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2005.861518
