Patent ID: 8483578

Claim:
A photonic generator of ultra-wide band millimeter wave (MMW), comprising: a wide-band optical source, said wide-band optical source obtaining and outputting a wide-band optical signal; a MMW band photodetector, said MMW band photodetector having a part of said MMW band photodetector located in a waveguide, said MMW band photodetector being combined with a horn antenna through said waveguide, said MMW band photodetector comprising an electrical signal input; a radio frequency (RF) choke connected with said electrical signal input; an optical detection switch connected with said RF choke; a fan-shaped broadband transition device connected with said optical detection switch; and an emitter connected with said optical detection switch, said MMW band photodetector obtaining a MMW ultra-wide band signal of RF from said wide-band optical signal, said MMW band photodetector delivering said MMW ultra-wide band signal to said waveguide to be outputted by said horn antenna; and an optical fiber device, said optical fiber device being positioned on an optical path between said wide-band optical source and said MMW band photodetector, said optical fiber device comprising a single mode fiber (SMF); and a lensed fiber connected with a probe head of said SMF at a side of said SMF, said SMF being optically coupled with a fiber amplifier and an attenuator at another side of said SMF, wherein said wide-band optical signal is amplified by said fiber amplifier and attenuated by said attenuator; wherein an optical beam is expanded by said SMF to output a collimated optical beam to said lensed fiber to focus optical beam; and wherein said wide-band optical signal is transferred to said lensed fiber from said SMF to be filled into said MMW band photodetector.