Active antenna adapted for impedance matching and band switching using a shared component
AssigneeEthertronics, Inc.
InventorsLaurent Desclos, Chun Su Yoon, Sung-soo Nam, M K Chun, Ji-Chul Lee
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Abstract
An active antenna and associated circuit topology is adapted to provide active impedance matching and band switching of the antenna using a shared tunable component. Using a shared tunable component, such as a tunable capacitor or other tunable component, the antenna provides a low cost and effective active antenna solution. In certain embodiments, one or more passive components can be further utilized to design band switching of the antenna from a first frequency to a second desired frequency.
Claims18
An active modal antenna adapted for impedance matching and band switching using a shared component, the antenna comprising:
- a driven antenna element;
- and
- at least one parasitic element positioned adjacent to the driven antenna element;
- the driven antenna element being coupled to a matching circuit;
- characterized in that:
- each of the matching circuit and the parasitic element are further coupled to a tunable component via transmission lines extending therebetween;
- wherein the tunable component is adapted to alter a reactance of each of the matching circuit and the parasitic element for effectuating active band switching and impedance matching of the antenna.
An active modal antenna adapted for impedance matching and band switching using a shared component, the antenna comprising:
- a driven antenna element;
- and
- at least one parasitic element positioned adjacent to the driven antenna element;
- characterized in that:
- the driven antenna element coupled to a matching circuit comprising a first tunable component;
- and
- each of the driven antenna element and the at least one parasitic element coupled to a second tunable component;
- wherein the antenna is configured for simultaneously matching the antenna impedance and band switching via the second tunable component.
An active modal antenna adapted for impedance matching and band switching using a shared component, the antenna comprising:
- a driven antenna element;
- said driven antenna element comprising an isolated magnetic dipole (IMD) antenna element positioned above a circuit board forming an antenna volume therebetween;
- and
- at least two parasitic elements positioned adjacent to the driven antenna element;
- said at least two parasitic elements comprising:
- a first parasitic element positioned adjacent to said IMD antenna element and within said antenna volume, and
- a second parasitic element positioned adjacent to the IMD antenna element and outside of the antenna volume;
- characterized in that:
- each of the at least two parasitic elements are further coupled to a shared one of:
- a tunable capacitor, a matching circuit, or a switch;
- wherein the antenna is configured for simultaneously matching the antenna impedance and band switching.
Dependencies are inferred from the claim text.