Patent ID: 7056852

Claim:
A dielectric resonator comprising: a dielectric ceramic; and input/output terminals electromagnetically connected with the dielectric ceramic, the dielectric ceramic comprising a high-frequency dielectric ceramic composition represented by a general formula: Ba[(Sn α Zr 1-α ) x Mg y (Nb β Ta 1-β ) z ] v O w , wherein molar ratios of x, y and z are within an area in a ternary diagram defined by a first point A (where x=0.30, y=0.22, and z=0.48), a second point B (where x=0.60, y=0.12, and z=0.28), a third point C (where x=0.60, y=0.14, and z=0.26), and a fourth point D (where x=0.30, y=0.25. and z=0.45), and is the molar ratios of x, y and z are not on a line between points A and D, x+y+z=1.00, 0.5≦α≦1.0, 0≦β≦1.0, 0.98≦v≦1.03, and w is a positive value to keep the composition electroneutral.