Patent ID: 8654023
Filing Date: 2014-02-18
Classification: H01Q

Abstract:
1. A multi-layered planar multi-band antenna, comprising: a magnetic loop located on a first plane and configured to generate a magnetic field, the magnetic loop forming two or more horizontal sections and two or more vertical sections formed at substantially 90 degree angles between the two or more horizontal sections and the two or more vertical sections, a first horizontal section among the two or more horizontal sections emitting a first electric field at a low frequency band, a second horizontal section among the two or more horizontal sections emitting a second electric field at a high frequency band, wherein the magnetic loop has a first inductive reactance adding to a total inductive reactance of the multi-band antenna; and a parasitic electric field radiator located on a second plane below the first plane, at least half of the parasitic electric field radiator positioned on the second plane at a position that would place the electric field radiator within the magnetic loop if the position was on the first plane, the parasitic electric field radiator not coupled to the magnetic loop, the parasitic electric field radiator configured to emit a third electric field at the low frequency band that reinforces the first electric field and orthogonal to the magnetic field, wherein the parasitic electric field radiator has a first capacitive reactance adding to a total capacitive reactance of the multi-band antenna, 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 wherein the total inductive reactance substantially matches the total capacitive reactance.