Accession Number:

ADA073079

Title:

Hemispherical Coverage of Four-Faced Aircraft Arrays.

Descriptive Note:

Rept. for Apr 78-Apr 79,

Corporate Author:

ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY

Report Date:

1979-05-01

Pagination or Media Count:

19.0

Abstract:

This report describes the radiating characteristics of a four-faced array with faces arranged in a streamlined configuration for hemispherical coverage. The report presents new experimental and theoretical results giving coverage for a side array in the plane perpendicular to the cylinder and shows that the structure radiates both polarizations efficiently for angles from the zenith to the horizon. In the absence of mutual coupling effects, the circularly polarized radiation remains within approximately 1 dB of the array projection factor. Finally the report presents coverage contours for a four-faced array with the front and back faces half the size of the side faces. In this case, the proper choice of front array tilt angle can result in a hemispherical gain projection factor within 3.5 dB of peak gain over nearly the whole hemisphere. Author

Subject Categories:

  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE