The principle and the technical development of optically controlled phased array radar are discussed.The applications and the advantages of the optical electronic techniques in wideband and wide scanning angle phased array radar are introduced.The structure principles and the features for different types of OTTD's (Optical True Time Delay) are presented in detail.Also

the optical modulation and detection techniques involved in radar microwave signal transimission are discussed

and the possible applications of optically controlled phased array radar techniques are pointed out.Finally

some implementation techniques for optically controlled phased array radar

such as the rational sub-system parameter assignment

the consideration for optical device temperature performance in array architecture designing are discussed.The efficient optical transmission link must be designed carefully so as to get identical amplitude and phase responses

high signal dynamic range

low nonlinear phase distortion.In the OTTD fabrication

the beam switching time

insert loss

crosstalk

time delay error must be considered seriously.To solve the problem of OTTD fabrication error in system level

the idea of joint beam steering controlling in sub-array and antenna element are proposed.