Patent attributes
Phase shifters such as networks that can be used in MMIC (Monolithic Microwave Integrated Circuit) and hybrid digital phase shifters, for low loss, wide bandwidth, and high linearity. A digital phase shifter includes input port for receiving signals and output ports for transmitting the signals. Multiple transmission lines are arranged between the input and output ports of the phase shifter. The transmission lines are arranged in a ring with first pair of the transmission lines which are arranged in series in a first path and second pair of the transmission lines arranged in series in a second path. One of the transmission lines of the first and second pairs include quarter-wave hybrid coupled line with coupled-ports and through-ports terminated in short-circuit. Hybrid coupled line can be a Lange coupler with or without RF crossover.
