Time-domain computer models of thin-wire antennas and scatterers
Technical Report
·
OSTI ID:4336935
The transient responses of various thin-wire antennas and scatterers were studied through the numerical solution of a timedependent electric field integral equation. The solution is set up as an initial value problem and proceeds via time stepping. This is a generally more efficient approach for determining the transient response of wire objects than frequency domain solutions which are Fourier transformed to obtaln transient characteristics. The time-domain solutions have been verified by comparisons with other solutions for structures such as the linear dipole, circular ring, conical spiral, and V-dipole. In addition to providing wideband frequency domain information via Fourier transformation, the time-domain solutions permit the temporal development of the currents and charges to be followed, which permits ready demonstration of reflections from junctions or ends of wires, the effects of loading, phase dispersion of the current waves as they travel along the structure, and structure resonances. The characteristics of several structures are considered with tae aim of providing insight into their EMP response characteristics. Attention is devoted to methods of data presentation which efficiently utilize the large amount of information which the time domain solution yields and to exploiting this data for problems of practical interest. These studies show, for example, that a current saturation occurs when a long wire (in free space) is illuminated by a short pulse plane wave. lnsight gathered from the timedomain solution of this problem has lead to a simple method of estimating the maximum current on the wire. (auth)
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- NSA Number:
- NSA-29-028957
- OSTI ID:
- 4336935
- Report Number(s):
- UCRL--74848; CONF-730935--5
- Country of Publication:
- United States
- Language:
- English
Similar Records
Computer analysis of the fan doublet antenna
Finitely conducting, infinitely long, cylindrical wire in the presence of a plane wave (emp)
Electromagnetic pulse excitation of finite- and infinitely-long lossy conductors over a lossy ground plane
Technical Report
·
Fri Oct 19 00:00:00 EDT 1973
·
OSTI ID:4411946
Finitely conducting, infinitely long, cylindrical wire in the presence of a plane wave (emp)
Technical Report
·
Mon Feb 20 23:00:00 EST 1984
·
OSTI ID:6879691
Electromagnetic pulse excitation of finite- and infinitely-long lossy conductors over a lossy ground plane
Journal Article
·
Thu Jan 12 19:00:00 EST 2017
· Journal of Electromagnetic Waves and Applications
·
OSTI ID:1340513