Patent ID: 9093734
Filing Date: 2015-07-28
Classification: H01P

Abstract:
1. A directional coupler comprising: an input port; an output port; a coupled port; a ballasting port; a primary chain of inductors comprising a plurality of inductors connected serially, wherein a first inductor of the primary chain of inductors is connected to the input port and a last inductor of the primary chain of inductors is connected to the output port; a secondary chain of inductors comprising a plurality of inductors connected serially, wherein a first inductor of the secondary chain of inductors is connected to the coupled port and a last inductor of the secondary chain of inductors is connected to the ballasting port; a first compensation capacitor connected to the input port and the coupled port; and a second compensation capacitor connected to the input port and the ballasting port; wherein the primary chain of inductors is inductively coupled to the secondary chain of inductors.