Patent ID: 7049905
Filing Date: 2006-05-23
Classification: H01P

Abstract:
1. A directional coupler comprising: a) a substrate having a top surface, a bottom surface and a plurality of layers; b) a first circuit line having a first end and a second end, the first circuit line located on one of the layers; c) an input port connected to the first end and an output port connected to the second end; d) a second circuit line having a third end and a fourth end, the second circuit line located on another layer, the first and second circuit lines located proximate to each other such that they are electromagnetically coupled; e) a forward coupled port connected to the third end and a reverse coupled port connected to the fourth end; f) a first ground plane located on the top surface; g) a second ground plane located on the bottom surface; and h) a plurality of ground vias connected between the first and second ground planes.