The utility model discloses a high output vector modulator, include: stationary phase separation network for produce 2 quadrature channel, diphase attenuator group recommends for to signal range of carrying on and the phse conversion among 2 quadrature channel, the power distribution synthesizer for signal synthesis among 2 quadrature channel of the range of will having passed through and phse conversion is signal all the way, adoption tube core series connection field effect transistor in the diphase attenuator group recommends, tube core series connection field effect transistor's tube core resistance is higher for the power that the tube core can bear also improves thereupon, and then feasible the adoption tube core series connection field effect transistor the utility model discloses the output of vector modulator also improves greatly.