Patent ID: 7394333

Claim:
A directional distributed coupler comprising: a first conductive line carrying a main signal to be transmitted by an antenna, the main signal being carried between two end terminals of the first conductive line; a second conductive line coupled to the first conductive line, the second line comprising a first terminal and a second terminal between which flows a sampled signal, proportional to the main signal, the second conductive line being coupled to the first conductive line such that the first terminal provides a first signal that is a function of a magnitude of the main signal flowing in a first direction on the first conductive line, and the second terminal provides a second signal that is a function of a magnitude of the main signal flowing in a second direction on the first conductive line; and a first capacitor having a first capacitor terminal connected to a first one of the two end terminals of the first conductive line and a second capacitor terminal connected to a second one of the two end terminals of the first conductive line, and a second capacitor having a third capacitor terminal connected to the first terminal of the second conductive line and a fourth capacitor terminal connected to the second terminal of the second conductive line.