D-band vector modulator phase-shifter with delay line-based differential quadrature generation

Abstract

An exemplary system and method are disclosed that employs a multi-bit D-band vector modulator phase shifter that couples to a transmission line-based delay input line structure for a phased array circuit. The exemplary system and method can generate differential quadrature signals that can be weighted by amplifiers and cascaded with a buffer amplifier to achieve wide bandwidth, moderate gain, and low power consumption. Tapered delay lines may be employed at the input for differential quadrature signal generation to achieve wider bandwidth than other vector modulator phase shifter at D-Band.