Backward waves in a waveguide, filled with wire media

This paper depicts the properties of rectangular waveguides filled with a double wire medium, i.e. a double array of wires, perpendicular to the waveguide walls. Spectra of eigenmodes for structures with wires connected and nonconnected at their intersections are analyzed analytically and numerically. The applicability of the effective medium theory is discussed. Finally, propagation of backward and forward waves below TM and TE modes cutoff are studied. (c) 2006 Wiley Periodicals, Inc.