Accession Number:

ADA411090

Title:

Space Fed Subarrays Using a Displaced Feed

Descriptive Note:

Corporate Author:

AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE

Personal Author(s):

Report Date:

1994-01-01

Pagination or Media Count:

20.0

Abstract:

A multiple beam transform feed for a phase-scanned lens has the desirable property of forming subarrays for the insertion of time delays across the large aperture. However, at certain scan angles and particular frequencies the multiple beam feed can have a focus at its front face. This phenomenon can be unacceptable when transmit amplifiers are used at this location since it requires that all power be provided from a few or even a single feed port. This paper presents a procedure for defocusing the feed to avoid the large dynamic range problem and spread the required power among a larger fraction of feed eIements.

Subject Categories:

  • Active and Passive Radar Detection and Equipment
  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE