QUASI-OPTICAL GRIDS WITH THIN RECTANGULAR PATCH APERTURE ELEMENTS

Theoretical analysis is presented for an efficient and accurate perfor mance evaluation of quasi-optical grids comprised of thin rectangular patch/aperture elements with/without a dielectric substrate/superstrat e. The convergence rate of this efficient technique is improved by an order of magnitude with the approximate edge conditions incorporated i n the basis functions of the integral equation solution. Also presente d are the interesting applications of this efficient analytical techni que to the design and performance evaluation of the coupling grids and beam splitters in the optical systems as well as thermal protection s unshields used in the communication systems of satellites and spacecra fts.