Phase and amplitude shifting surface (pass)

Details Phase and amplitude shifting surface (pass) Phase and amplitude shifting surface (pass)

H - Electricity

01

P

H01P 1/18 (2006.01) G03H 5/00 (2006.01)

Patent

CA 2674785

A thin electromagnetic surface, named phase and amplitude shifting surface (PASS), is disclosed. The PASS is capable of independently altering both the spatial phase and amplitude distribution of the electromagnetic fields propagating through the structure. The surface comprises a few metallic layers (typically 3 or 4) with etched patterns separated by dielectric layers (typically 2 or 3). The patterns of the metallic layers are tuned to locally alter both the phase and the amplitude of an incoming wave to a prescribed set of desired values for the outgoing wave. The PASS can be applied to design components such as gratings, lenses, holograms, and various types of antennas in the microwave, millimetre wave and sub-millimetre wave.

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