Patent ID: 8144065

Claim:
A multi-layered planar antenna, comprising: a magnetic loop located on a first plane and configured to generate a magnetic field, wherein the magnetic loop has a first inductive reactance adding to a total inductive reactance of the multi-layered planar antenna; an electric field radiator located on the first plane and within the magnetic loop, the electric field radiator coupled to the magnetic loop and configured to emit an electric field orthogonal to the magnetic field, wherein the electric field radiator has a first capacitive reactance adding to a total capacitive reactance of the multi-layered planar antenna, and wherein a physical arrangement between the electric field radiator and the magnetic loop results in a second capacitive reactance adding to the total capacitive reactance; and a tunable patch located on a second plane below the first plane, wherein the tunable patch has a third capacitive reactance adding to the total capacitive reactance, and wherein the total inductive reactance substantially matches the total capacitive reactance.