Analysis of the infinite array of slot impedance loads based on the cavity with an equilateral triangular cross section
Two-dimensional problem of an infinite array of slot impedance loads by the plane wave is considered. Each array element represents a slot in a perfectly conducting screen loaded by a cavity with equilateral triangle cross-section. The integral equations method is used to solve the problem, the Krylov-Bogoliubov method is applied to calculate them. For the case of H-polarized incident wave equivalent surface impedance dependencies on construction geometric sizes is calculated. Comparative analysis of dependencies obtained for construction under consideration of an infinite array of slot impedance loads with those ones for single impedance load is carried on.
The minimization of the back scattering of a cylinder by central loading
A theoretical and experimental study of the minimization of the back scattering by a thin cylinder by central loading is presented. The induced current on a centrally loaded cylinder illuminated by a plane wave at normal incidence was determined theoretically and experimentally. The magnitude and phase of the induced current can be greatly changed by a central impedance. The optimum loading to achieve zero back scatter in the broadside direction from a thin cylinder shorter than two wavelengths and the optimum central impedance for the purpose of minimizing the broadside back scattering from a thin cylinder over a wide range of frequencies has been determined.
Reactive loading of arbitrarily illuminated cylinders to minimize microwave backscatter
In thi s pape r a s tudy of the min imiza tion of the radar cross sec tion of a thi n cyLinde r by central loading is prese nt ed. The ind uced c urre nt on a cent e r·loaded cylinde r illuminated by a p lane wave a t a n arbitrary a ngle is d etermined. T he bac ksca tt e red fi eld is cal c ulated and the opt imum loadi ng to achieve ze ro broad s ide backscattering is obtained. An o pt imum impedance load ed at th e cent er of a resonant cylinder ca n reduce it s rada r c ross sec t ion more than 30 dB fo r a ny as pec t angle. F or an antiresonant cy lind er a n op timum ce ntra l loadin g ca n minimi ze the rada r c ross sec tion in the broads id e direction but it ca nnot modify a pprec iab ly th e radar c ross sec ti on in th e off·broads ide d irec ti on. The e ffec ti ve ness a nd the fcas ibilit yof th e loading tec hniqu e for th e reduc tio n orth e radar c ross sec ti on of a metalli c body is discu ssed.