Abstract: Systems, apparatuses and methods may provide for an antenna system including a cavity and a broadband antenna coupled to the cavity. The broadband antenna may include surfaces defining a slot, wherein a cross-section of the cavity defines a resonant frequency range of the slot. The broadband antenna may also include a plurality of transmission lines, wherein the plurality of transmission lines bridge the slot and are spaced apart at a sub-wavelength distance with respect to a target frequency range of the antenna system. Additionally, the broadband antenna may include a plurality of inductive tuning elements, each inductive tuning element being disposed adjacent to one of the plurality of transmission lines, wherein the target frequency range is a function of the resonant frequency range and an impedance associated with the plurality of inductive tuning elements.

Abstract: A pylon for supporting a test target in an anechoic chamber during a radar cross section measurement. The pylon includes an elongated support extending upwardly from a base to a tip on which the test target is mounted. The support inclines and curves in the direction of an interrogating radar signal, and its tip is smoothly faired to the test target. The tip is formed from a resilient, radar-absorbing material, and it is bent by internal actuating means to vary the angular orientation of the test target.