I told you to check out the datasheets for an I/Q modulator at www.rfmd.com , that will lead you the right direction. If I can recall.. They consist of two mixers.. One mixer is driven by a local oscillator and the other one is driven with the same local oscillator with its phase shifted 90degrees, then they are summed at the output.. but I am not sure
You can either get an integrated solution, or try to make one out of more discreet ICs.
ya sir i doewnload that page but still some question,s lke wwho can i use it wheer to find circuit,s and what it do ? I/Q modulator as name as it,s modulation device but still any thing to tell i will be thx,s ful to u all