present invention first and second support elements are provided to support the source and target of interest respectively low rcs measurement chambers and systems are also described application_number US 2034198 A description by way of introduction a 34 shaped 34 low rcs measurement chamber provides an optimal background level through careful shaping of the measurement chamber itself combined with the selective use of ram and radar range time gating preferably the shaped rcs measurement chamber is a body of revolution about an axis running through the center of the target measurement zone the shape of the rcs chamber advantageously can be selected to meet the measurement requirements for the device e g target or antenna under test an exemplary preferred embodiment of a low rcs measurement chamber according to the present invention is illustrated in fig1 a before discussing any of the preferred embodiments according to the present invention it will be helpful to establish the terminology used throughout this section a source 100 which in an exemplary case can be a collimating source or the like generates emitted signals which are directed toward the target of interest 200 a portion of the emitted signals scattered by the target of interest 200 will be returned in the direction of the source 100 these signals will hereinafter be referred to as backscattered signals another portion of the emitted signals will impinge on the target of interest 200 and be scattered in various directions these latter signals will impinge on the rcs measurement chamber walls and be re scattered henceforth these signals will be referred to as.