A negative refractive index medium, in which all spatial coordinates are reversed (i.e. a left-hand
triplet is formed) by a spatial folding transformation, can create many novel electromagnetic
phenomena, e.g. backward wave propagation, and inversed Doppler effect (IDE). In this study, we use
coordinate rotation transformation to reverse only two spatial coordinates (e.g. x ′ and y ′), while
keeping z ′ unchanged. In this case, some novel phenomena, e.g. radiation-direction-reversing
illusions and IDE, can be achieved in a free space region wrapped by the proposed shell without any
negative refractive index medium, which is easier for experimental realization and future
applications.