文档介绍：Digital Beamforming Receiver Architectures for Microwave Remote Sensing
Applications
James B. Mead
Quadrant Engineering Inc.
107 Sunderland Rd.
Amherst, MA 01002
Phone: (413) 549-4402 FAX: (413)549-5203
******@quad-engxom
Abstract - Digital beamforming radar systems, capa-
ble of generating multiple antenna beams simultaneously,
are now being used for high spatial resolution studies of
the ocean surface and atmospheric boundary layer. This
paper describes several receiver architectures applicable
to digital beamforming systems pares their rel-
ative merits. The simplest and lowest-cost architecture,
comprised of a single receiver sampling a large array of
antenna elements, is applicable to situations where some
receiver inefficiencies can be tolerated. The second ar-
chitecture described attaches plete low noise re-
ceiver to each antenna element in the array to achieve
the highest possible sensitivity. The Turbulent Eddy Pro-
filer (TEP) utilizes this architecture to study clear air
turbulence intensity and motions within the atmospheric
boundary layer. A third architecture, employing a high
Fig. 1. FOPAIR’s X-band receiver array of 128 elements.
accuracy digital receiver to sample each antenna output,
is applicable to systems requiring the highest degree of
antenna pattern control. sampling rates up to 400 MS/s at 1