Patent ID: 7764147

Claim:
A coplanar resonator including: a dielectric substrate; a center conductor formed on a top surface of said dielectric substrate and having a main line conductor formed by extension into a rectilinear shape having one end and another end on said top surface of said dielectric substrate and a first and a second auxiliary line conductor formed by bifurcating from said one end of said main line conductor and being folded back on both sides of said main line conductor, wherein to achieve a same resonant frequency of a single line conductor without bifurcation, the length of said main line conductor is shorter than a length of said single line conductor; a pair of input/output terminals formed on said top surface of the dielectric substrate on both outer longitudinal sides of the main line conductor to extend on a line parallel with the main line conductor; and a ground conductor surrounding said center conductor and formed on said top surface of said dielectric substrate.