Patent ID: 7183877

Claim:
Directional coupler in coplanar waveguide technology comprising at least one first directional coupler unit with a first connection for feeding in or guiding out a wave, a second connection for feeding in or guiding out a wave supplied directly from or to the first connection, a coupled connection for coupling a fraction of a supplied wave at the first connection, a termination, a first center conductor connecting the first connection and the second connection, a second center conductor connecting the coupled connection and the termination, and coplanar ground conductors bordering the outside of each of the center conductors, characterized in that the spacing between the two center conductors changes along the longitudinal extension of the center conductors over a coupler section, and the second connection of the first directional coupler unit is connected via a center conductor with two adjacent ground conductors to a second connection of a second directional coupler unit.