Antenna reflector

An antenna reflector which reflects radio waves sent by a source external to said antenna in an incoming direction of said radio waves, said antenna reflector comprising:

• three reflectors which reflect incoming radio waves and which have reflecting surfaces that are substantially larger than a wavelength of said radio waves;
• wherein said reflectors are joined in a shape of a corner of a cube so that each of said reflectors is perpendicular to each other reflector;
• each of said reflectors including
• a) a semiconductor layer,
• b) a plurality of conductive sheets disposed on a first side of said semiconductor layer,
• c) a plurality of switching elements in said semiconductor layer, each of said plurality of switching elements being electrically connected to at least two of said plurality of conductive sheets,
• d) a first insulator film covering said plurality of conductive sheets and said plurality of switching elements,
• e) a second insulator film disposed on a second side of said semiconductor layer opposite said plurality of conductive sheets,
• f) a first resistor film disposed on a side of said first insulator film opposite said plurality of conductive sheets and said plurality of switching elements, and
• g) a second resistor film disposed on a side of said second insulator film opposite said second side of said semiconductor layer;
• and
• said antenna further comprises modulation means is for varying said reflectivities of said reflecting surfaces by varying a voltage applied to said first and second resistor films.

An antenna reflector which reflects radio waves sent by a source external to said antenna in an incoming direction of said radio waves, said antenna reflector comprising:

• three reflectors which reflect incoming radio waves and which have reflecting surfaces that are substantially larger than a wavelength of said radio waves;
• wherein said reflectors are joined in a shape of a corner of a cube so that each of said reflectors is perpendicular to each other reflector;
• each of said reflectors including
• a) an insulator layer,
• b) a semiconductor layer disposed on a first surface of said insulator layer,
• c) a plurality of conductive sheets disposed on a side of said semiconductor layer opposite said insulator layer,
• d) a plurality of thin-film switching elements formed in said semiconductor layer, each of said plurality of switching elements being electrically connected to at least two of said plurality of conductive sheets,
• e) an insulator film covering said plurality of conductive sheets and said plurality of switching elements,
• f) a first resistor film disposed on a side of said insulator film opposite said plurality of conductive sheets and said plurality of switching elements, and
• g) a second resistor film disposed on a side of said insulator layer opposite said semiconductor layer;
• and
• said antenna further comprises modulation means for varying reflectivities of said reflecting surface by varying a voltage applied to said first and second resistor films.

An antenna reflector unit comprising an antenna reflector including:

• a substrate;
• a plurality of conductive films disposed on said substrate;
• a plurality of switching elements each disposed between and electrically connected to at least two adjacent conductive films in said plurality of conductive films;
• wherein said plurality of switching elements are each for establishing an electrical connection between said at least two adjacent conductive films, thereby causing said plurality of conductive films to form a surface which reflects radio waves.

An antenna reflector which reflects radio waves sent by a source external to said antenna in an incoming direction of said radio waves, said antenna reflector comprising:

• three reflectors which reflect incoming radio waves and which have reflecting surfaces that are substantially larger than a wavelength of said radio waves;
• wherein said reflectors are joined in a shape of a corner of a cube so that each of said reflectors is perpendicular to each other reflector;
• and
• a member which is disposed on a front surface of said reflectors and is for changing a transmissivity of said radio waves therethrough.