Using grating modulation to achieve wideband large area diffusers

Concatenating individual diffusers to form larger ones narrows their diffusion pattern into specific directions. Solutions are proposed which use modulation of existing diffusion structures with other sequences to achieve the improved diffusion patterns. These techniques provide large area diffusion structures that do not suffer from having narrowed diffusion patterns. It can also be used to develop diffusion structures that have specific diffusion patterns or have an extended frequency range. They also have the advantage that they can be implemented easily using existing diffusers. The theory, design, advantages and limitations of these structures will be discussed and simulation results of their performance will be presented.