| 摘要 |
A phase dependent splitter/combiner 4-port coupler device is composed of two duplicating stages and a cross-over stage and provides the phase dependent splitting and combining functionality of a 4-port coupler without the ambiguity of the coupling coefficient of coupled mode analysis. The 4-port coupler device receives two input signals and produces two output signals. Each duplicating stage consists of an amplifier and a splitter and produces two duplicated signals. The cross-over stage receives the four duplicated signals from the two duplicating stages, consists of a phase inverter and two combiners, and produces the two output signals. In the duplicating stages, the two input signals are amplified and then split to produce the four duplicated signals. In the cross-over stage, one of the duplicated signals is phase inverted using the phase inverter. The inverted signal and the remaining three duplicated signals are cross-combined, using two combiners, to produce the two output signals. If the combiners are 3dB couplers, the 4-port coupler device performs a splitter operation or a combiner operation. If the combiners are non-3dB couplers, the 4-port coupler device performs a replicator operation or a combiner operation. The device can be used for optic, including infrared and ultraviolet, or microwave signals. |
