Patent ID: 6313807
Filing Date: 2001-11-06
Classification: H01Q

Abstract:
An antenna device comprising:a metal plate;a waveguide disposed on, and in intimate contact with, an upper surface of said metal plate, said waveguide comprising a plurality of sections having slots disposed therein for guiding a corresponding plurality of electromagnetic waves therethrough;a common linear patch antenna array disposed on, and in intimate contact with, an upper surface of said waveguide;a plurality of electrical inputs connected to said waveguide and said linear patch antenna array for feeding said plurality of electromagnetic waves at a predetermined frequency to said waveguide and said linear patch antenna array; anda transmitting and receiving circuit for transmitting said electromagnetic waves to said waveguide and linear patch antenna array and receiving electrical signals from said linear patch antenna array, whereby when said plurality of electromagnetic waves is directed through said plurality of sections of said waveguide, said plurality of waveguide sections generate a plurality of phase differences which accumulate to form a directed beam through said linear patch antenna array.