Patent ID: 7995001

Claim:
A dielectric resonator antenna being adapted to emit a radio wave by resonating a signal, said dielectric resonator antenna comprising: a conductive plate having a first and a second surface which are faced opposite to each other; a dielectric placed opposite to said first surface of the conductive plate, said dielectric having a relative permeability (μra) of μra >1; an electrode provided to said dielectric and adapted to be supplied with said signal; and a magneto-dielectric layer placed on said second surface of the conductive plate; wherein said dielectric contains a magnetic material and a dielectric material to have frequency vs. antenna input impedance characteristics in which frequencies are partly superimposed in a half of resonance peak between a first mode on a low frequency side and a second mode on a high frequency side, and wherein said magneto-dielectric layer has a relative permeability (μrr) and a relative permittivity (∈rr), where μrr is not less than ∈rr, whereby said magneto-dielectric layer produces a mirror-image effect with respect to an electric field.