Patent ID: 7161444
Filing Date: 2007-01-09
Classification: H01P

Abstract:
1. A directional coupler comprising: a substrate; and a conductor pattern formed on the substrate, the conductor pattern including: a second conductive pattern portion defined by the third and fourth lines and a second connecting line that connects the first point of the third line and the first point of the fourth line, the second connecting line being one of a curve and a bent line having an inner angle equal to or more than 90° and less than 180°, wherein respective crossing angles defined at an intersection of the second connecting line and edges of the third and fourth lines is equal to or more than 90° and equal to or less than 180°, wherein each of the first to fourth lines has a respective second point on the center line thereof, the second point being a second distance from the predetermined point, wherein the second distance is different from the first distance; and the conductor pattern further includes: a fourth conductive pattern portion defined by the fourth and first lines and a fourth connecting line that connects the second point of the fourth line and the second point of the first line, the fourth connecting line being one of a curve and a bent line having an inner angle equal to or more than 90° and less than 180°, wherein respective crossing angles defined at an intersection of the fourth connecting line and edges of the fourth and first lines is equal to or more than 90° and equal to or less than 180°, wherein stubs are not connected any to of the conductive pattern portions.