Accession Number : ADA275797


Title :   Adaptive Nulling in Hybrid Reflector Antennas


Descriptive Note : Rept. for Sep 1990-Aug 1992


Corporate Author : ROME LAB HANSCOM AFB MA


Personal Author(s) : Shore, Robert A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a275797.pdf


Report Date : Sep 1992


Pagination or Media Count : 48


Abstract : Hybrid antennas. the combination of a radiating or receiving aperture with an array feed, have been the subject of considerable recent interest because they offer some of the versatility of phased array antennas at a much lower cost. Adaptive nulling in hybrid antennas has not received as much attention as other important aspects, such as compensation for reflector surface distortion, scanning, pattern calculation, and the design of multibeam antennas. In this report we investigate adaptive nulling in hybrid reflector antennas using the Generalized Sidelobe Canceller algorithm. A general framework is presented for the computer simulation of narrow band adaptive nulling in hybrid reflector antennas that takes account of the details of reflector scattering and polarization. The general framework is then illustrated by the results of calculations performed for an offset paraboloid with a planar feed located in the focal plane of the paraboloid. Hybrid antennas, Adaptive nulling, Reflectors, Offset paraboloid, Array feed, Generalized sidelobe. Canceller,


Descriptors :   *ANTENNAS , *REFLECTORS , SCANNING , ALGORITHMS , SIMULATION , SCATTERING , POLARIZATION , FOCAL PLANES , DISTORTION , APERTURES , PHASED ARRAYS , SIDELOBES , ATTENTION , COMPENSATION , PATTERNS , COMPUTERS , ARRAYS , COSTS , SURFACES


Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE