Accession Number:

ADA099078

Title:

Synthesis of Antenna Patterns with Null Constraints,

Descriptive Note:

Corporate Author:

ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY

Personal Author(s):

Report Date:

1981-01-01

Pagination or Media Count:

27.0

Abstract:

The Gaussian antenna pattern synthesis method is extended to include constraints such as pattern nulls or pattern derivative nulls at a given set of angles. The problem is formulated as a constrained approximation problem which is solved exactly, and a clear geometrical interpretation of the solution is given in a multidimensional vector space. The relation of the present method to those of constrained gain-maximization and signal-noise ratio maximization is discussed and conditions for their equivalence stated. For a linear uniform N-element array, it is shown that when M nulls are imposed on a given quiescent pattern, the optimum solution for the constrained pattern is the initial pattern and a set of M weighted sin Nxsin x-beams. Each beam is centered exactly at the corresponding pattern null, irrespective of its relative location. In addition, simple quantitative expressions are derived for the pattern change and gain cost associated with the forced pattern nulls. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE