A millimeter-wave radiometer using electro-optic modulation and photodetection is presented.The millimeter-wave energy collected by the antenna is transferred to the sidebands of the optical carrier by an electro-optic modulator,and then transmitted through the optical fiber.Fiber Bragg grating filters are subsequently used to suppress the optical carrier and a photo-detector is used to detect the energy in the remaining sideband.The output signal of the photo-detector is detected by a lock-in a...