Accession Number:

AD0260244

Title:

A VARIATIONAL METHOD OF SYNTHESIZING ANTENNA POWER PATTERNS

Descriptive Note:

Corporate Author:

STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s):

Report Date:

1961-03-01

Pagination or Media Count:

1.0

Abstract:

A variational approach is developed by means of which both the phase and the amplitude of an antenna excitation function that approximates a prescribed far-field power pattern can be determined. No information concerning the phase of the prescribed pattern need be supplied. The resultant pattern will be an optimum approximation in a mean-square sense and the excitation function will be the smoothest one possible under the prescribed circumstances. The relative importances of the pattern fit and the smoothness of the excitation function can be adjusted by means of weighting factors. The width of the radiating aperture appears as an explicit parameter of the synthesis procedure so that trade-offs between aperture size, pattern error, and smoothness of excitation function may easily be examined. In paricular, this latter feature will make possible an explicit determination of the relationship between a given amount of super-gain and the resulting fluctuation of the excitation function in the radiating aperture. The smoothness requirement also has the effect of achieving the highest possible aperture efficiency consistent with the allowable pattern error. A numerical procedure whereby the necessary computations can be performed on a digital computer of only moderate speed and capacity is described. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE