Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1110l&link_type=abstract
American Astronomical Society, AAS Meeting #211, #11.10; Bulletin of the American Astronomical Society, Vol. 39, p.745
Astronomy and Astrophysics
Astronomy
Scientific paper
A fully-sampled, electrically small focal plane array (FPA) was installed on the 20 meter telescope at the Green Bank NRAO facility during the summer of 2007 to demonstrate adaptive beamforming for sensitivity optimization and interference mitigation in Radio Astronomy. The array consists of 19 dipoles tuned to 1600MHz, 0.25ë above a ground plane, spaced 0.6ë from each other. Synchronously-sampled voltages from all receivers are streamed to disk, then digitally filtered and complex-basebanded prior to spectrum analysis, electronic beamsteering, and square-law detection in post-processing. A 3.6m reference antenna is set up to obtain a high-gain reference copy of interferer data for higher interferer-to-noise ratio measurements. Experiments study multiple beam formation and spatial interference cancellation using common beamformers such as LCMV and Max-SNR adapted to a parabolic reflector. Antenna test range measurements show significant effects of mutual coupling on individual element beampatterns with a closely-packed array. Preliminary results of interference mitigation will also be presented. This work is supported by a grant from the Nation Science Foundation, AST-0352705 "RFI Mitigation for Radio Astronomy with Emphasis on Array Feeds" and by the National Science Foundation's Research Experience for Undergraduates program at the National Radio Astronomy Observatory.
Fisher Richard Royal
Landon Jonathan
Norrod Roger
No associations
LandOfFree
A 19-Element L-band Focal Plane Array for Interference Mitigation with Auxiliary Reference Antenna on the Green Bank 20-meter Telescope does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A 19-Element L-band Focal Plane Array for Interference Mitigation with Auxiliary Reference Antenna on the Green Bank 20-meter Telescope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A 19-Element L-band Focal Plane Array for Interference Mitigation with Auxiliary Reference Antenna on the Green Bank 20-meter Telescope will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1474594