A Study of the Feasibility of Using 35 GHz and/or 94 GHz as a Means of Improving Low Angle Tracking Capability
NAVAL RESEARCH LAB WASHINGTON DC
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Millimeter-wave radar systems was analyzed to determine their low- angle tracking capability. The narrow beam widths that can be obtained at these frequencies with antennas of reasonable size permit a target to be resolved in angle from its image. Because of the severe effects of tropospheric attenuation, the study was limited to two frequency bands, 35 and 94 GHz, which lie near the principal minima of the attenuation curve. Theoretical expressions for radar tracking accuracy, together with existing attenuation data, have been used to compare the performance of realizable 35-GHz K sub a-band and 94-GHz W-band radars with that of an existing 5280-MHz C-band radar. An antenna diameter of 12 feet was assumed for all three systems. It is found that the tracking range of the millimeter-wave radars is limited severely by atmospheric effects and by state-of-the-art transmitters and receivers. But there is a significant increase, as compared with the C-band radar, in the extent of the low angle region within which precision 0.1 mil tracking can be realized.
- Active and Passive Radar Detection and Equipment