Space Fed Subarrays Using a Displaced Feed
AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE
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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.
- Active and Passive Radar Detection and Equipment
- Unmanned Spacecraft