Experimental Studies of UWB Multimode Waveguide Van Atta Array

The results of experimental studies of a wideband multimode waveguide Van Attа array constructed on the basis of multimode waveguides in the H-plane (operating when an E-polarized wave is incident) are described. The experimental results were obtained from the monostatic backscattering diagrams of an antenna array in the range of 5–18 GHz in the frequency domain. The experimental monostatic backscattering diagrams (RCS) of Van Atta antenna array shown the good agreement with the calculated one, the half-power width of radiation lobe no less ± 45°. The possibility of frequency extension of a wide-band multimode Van Atta waveguide array due to the excitation of waveguides by ultra-wideband printed dipoles is investigated. The frequency range of the array was able to expand to 6-16 GHz by the antiphase excitation of ultra-wideband printed dipoles.