Accession Number:

ADA231825

Title:

Antenna and Backscattering Patterns of Reflectors that are Partially Resistive

Descriptive Note:

Final rept. Jan-May 1989,

Corporate Author:

AIR FORCE ACADEMY COLORADO SPRINGS CO

Personal Author(s):

Report Date:

1990-12-01

Pagination or Media Count:

59.0

Abstract:

This report examines the backscattering patterns and far field radiation patterns of two-dimensional corner reflector and parabolic reflector antennas for E-polarization. A surface integral equation formulation is employed to obtain the current density on a resistive reflector surface. The current is the integrated to obtain the radar cross section and far field receive radiation pattern. The same method is then used to calculate the scattering and radiation patterns of corner and parabolic reflector antennas with resistive surfaces. This analysis demonstrates that, when the entire reflector is resistive rather than conducting a reduction of the large backscattering lobes for front and back broadside incidence occurs along with a substantial reduction in gain. Tapering the resistivity of the surface, however, has little effect on the front and back backscattering lobes, but reduces the scattering sidelobes. The tapers significantly reduce the radiation pattern sidelobes with little reduction in gain.

Subject Categories:

  • Electrical and Electronic Equipment
  • Radar Countermeasures
  • Active and Passive Radar Detection and Equipment
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE