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US 2012/0075156 A1Published application
Variable directional antenna device
OwnerWataru Noguchi, Hiroyuki Yurugiinventors
Life of this patent
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Abstract
A feed element is configured to include a first antenna element having a first width, a dual-band forming inductor, and a second antenna element having a second width wider than the first width, where the first antenna element, the dual-band forming inductor, and a second antenna element are connected in series. The inductor is formed in a meander shape which has a trapezoidal envelope external shape to have a width formed to widen from the first width of a portion connected to the first antenna element toward a portion connected to the second antenna element.
Claims9
1-4. (canceled)
A variable directivity antenna apparatus comprising:
- one feed element;
- and
- at least one parasitic element provided to be aligned with and electromagnetically close to the feed element, the parasitic element having one end connected to one end of a diode having grounded another end,
- wherein a directivity of the variable directivity antenna apparatus is changed by turning on and off the diode,
- wherein the feed element comprises:
- a first antenna element having a first width;
- a dual-band forming inductor;
- and
- a second antenna element having a second width wider than the first width,
- wherein the first antenna element, the dual-band forming inductor, and the second antenna element are connected in series with each other, and
- wherein the dual-band forming inductor is formed in a meander shape to have a trapezoidal envelope external shape having a width formed to widen from the first width of a portion connected to the first antenna element toward a portion connected to the second antenna element.
8 more elements
Dependencies are inferred from the claim text.