Title :
Time-domain physical-optics analysis of large reflector antennas
Author :
Sun, E.-Y. ; Rusch, W.V.T.
Author_Institution :
Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
The time-domain analysis of large reflector antennas is presented. Physical-optics time-domain analysis is used to determine the antenna characteristics under pulse-modulated RF excitation. The resulting far fields for a front-fed paraboloid are shown. The waveforms of the incident wave and scattered field are plotted. From these patterns one can determine buildup and decay transient time as a function of reflector diameter or observer look angle. Using the peak of the steady-state field for different look angles, one can determine the gain pattern of the reflector, which agrees exactly with the gain pattern obtained directly from frequency-domain analysis.<>
Keywords :
antenna radiation patterns; physical optics; reflector antennas; time-domain analysis; antenna characteristics; buildup time; decay transient time; far fields; front-fed paraboloid; gain pattern; incident wave; observer look angle; physical-optics analysis; pulse-modulated RF excitation; reflector antennas; reflector diameter; scattered field; steady-state field; time-domain analysis; waveforms; Finite difference methods; Impedance; Magnetic fields; Microwave antennas; Radio frequency; Reflector antennas; Scattering; Steady-state; Sun; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115041
