MICROWAVE CIRCUIT

PURPOSE:To obtain a microwave hybrid circuit by which a DC signal is cut off simply. CONSTITUTION:The circuit is made up of a 1st ring conductor 1 and a 2nd ring conductor 2 coupled electrically with the 1st conductor 1, a 1st input output terminal P1 connects to the 1st conductor 1 and a 2nd input output terminal P2 is connected to a point advanced by 90 deg. from the 1st input output terminal P1 on the 2nd conductor 2. A 3rd input output terminal P3 is connected at a point advanced by 90 deg. on the 1st conductor 1 from the terminal P2, and a 4th input output terminal P4 connects to a point on the 2nd conductor 2 advanced by 90 deg. from the terminal P3 and then a point on the 1st conductor 1 advanced further by 90 deg. from the 4th input output terminal P4 comes to the 1st input output terminal P1. Thus, a DC signal is cut off without connection of a distributed matching device or a capacitor to each terminal.