50 N N-way switchable combiner by using 50transmission line only

摘要

PURPOSE: An N-path switchable combiner only using 50 ohm line is provided to efficiently perform an impedance matching only by using 50 ohm line, and by switching the length of an open stub according to the number of paths combined. CONSTITUTION: A plurality of input port(Pi1,Pi2,Pi3) input RF signals. Switches(S11,S12,S13) are corresponded to each input port(Pi1,Pi2,Pi3) for selecting the arbitrary number of ports among the input ports(Pi1,Pi2,Pi3). Line(L2,L3) transmit signals combined by selecting the arbitrary number of port. Switches(S22,S23) connect lines(L2,L3) corresponded to the number of paths combined. An open stub corresponded to the number of paths is equipped with a determined length. A control signal terminal controls the switches(S11,S12,S13) and the switches(S22,S23).