A GaAs phase digitizing and summing system for microwave signal storage

Design and Implementation of a Digital Radio Frequency Memory

“…The near-harmonic suppression is improved: the worst-case harmonic for the amplitude technique is the third harmonic while for the phase approach it is the seventh harmonic. The phase digitizing is theoretically independent of signal amplitude, thus eliminating dynamic range problems typically associated with amplitude systems [7]. The performance of a phase sampled DRFM system within a false target jammer is very similar to that of the double-sideband system whilst requiring the storage of approximately half the number of bits.…”

“…An additional subsystem is required to ensure that the recreated signal is transmitted at an appropriate level [1]. The advantage of the phase approach over the amplitude approach diminishes as the number of bits increases [7].…”

An All-Digital Image Synthesizer for Countering High-Resolution Imaging Radars

“…If the target rotates at a rate of CO rad/s towards the radar, a scatterer at a cross range distance a has an instantaneous velocity coa toward the radar with a corresponding Doppler frequency shift fä=^f- (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) Considering two scatterers in the same slant range cell separated by da then * -^ (2. 13) resulting in a cross range resolution of da = ^-df d (2.14)…”