| Popis: |
In this paper, approximate formulas are obtained for the monostatic and bistatic diagrams of radar cross-section of waveguide Van-Atta array considering excitation and propagation of higher types of waves in tracts. Their contribution to the scattered field is studied. The required number of higher types of waves and their propagation conditions are estimated to ensure the widest possible monostatic diagram of radar crosssection. Based on this analysis, the designs of multimode waveguide Van-Atta arrays are offered with tracts, providing non-dispersible transfer of fields between each pair of emitters. Keywordsantenna array; frequency-selective surface; shield; radiation pattern; scattering characteristic |
