Patent ID: 7161449

Claim:
A coplanar waveguide resonator comprising: a center conductor; a pair of shorting stubs; a pair of ground conductors; and a substrate made of a dielectric; the center conductor, the shorting stubs and the ground conductors being disposed on the dielectric substrate in such a coplanar manner that the ground conductors are disposed on opposite sides of the center conductor with a gap portion therebetween where the dielectric is exposed, so that the ground conductors and the center conductor have edge lines toward the dielectric, and that the respective shorting stubs are disposed to connect the opposite sides of the center conductor at a position having a predetermined distance from an open end thereof to respective ground conductors resulting in forming corner areas that open toward the dielectric at junctions between each of said shorting stubs, said center conductor, and each of said ground conductors, so that each of said shorting stubs has an edge line toward the dielectric between the corner areas thereof, respectively; wherein each of the corner areas is composed of two edge lines which are the edge line of the shorting stub and the edge line of the center conductor or the ground conductor, and the two edge lines are connected together at corner point of the corner area with an angle greater than 90° opening toward the dielectric.