Patent ID: 7642949

Claim:
A method of generating images using millimeter wave energy, the method comprising: illuminating a subject with millimeter wave radiation produced by at least two millimeter wave radiation sources, wherein said illuminating comprises: polarizing a first millimeter wave source with a first polarization; polarizing a second millimeter wave source with a second polarization; and modulating the first and second radiation source to produce modulated millimeter wave radiation, wherein modulating comprises first modulating the first millimeter wave source with a first modulation that alternates the states of the radiation source between a first state and a second state and second modulating the second millimeter wave source with a second modulation that alternates the states of the radiation source between said first and second states; generating a first image of the subject using the millimeter wave radiation detected by a millimeter wave sensor when the first radiation source is in the first state; generating a second image of the subject with the millimeter wave radiation detected by the millimeter wave sensor when the second radiation source is in the first state; analyzing the generated images to detect representations corresponding to objects associated with the subject, wherein the analyzing comprises identifying an object in the generated images based on properties of an object identified in the first image properties of the same object in the second image with respect to millimeter wave radiation.