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US 2010/0141548 A1Published application
Multilevel and space-filling ground-planes for miniature and multiband antennas
AssigneeFractus, S.A.
InventorsRamiro Quintero Illera, Carles Puente Baliarda
Life of this patent
Estimating the term…
Abstract
An antenna system includes one or more conductive elements acting as radiating elements, and a multilevel or space-filling ground-plane, wherein said ground-plane has a particular geometry which affects the operating characteristics of the antenna. The return loss, bandwidth, gain, radiation efficiency, and frequency performance can be controlled through multilevel and space-filling ground-plane design. Also, said ground-plane can be reduced compared to those of antennas with solid ground-planes.
Claims20
An antenna system comprising:
- an antenna element;
- and
- a ground plane comprising:
- at least two conducting surfaces each having a plurality of sides defined by at least one edge;
- at least one conducting strip connecting the at least two conducting surfaces for allowing current to flow between the at least two conducting surfaces;
- the at least one conducting strip being narrower than the width of any of the at least two conducting surfaces;
- the ground plane being disposed in a plane substantially parallel to a plane of the antenna element;
- the ground-plane further comprising at least one of a space-filling-curve shape and a multilevel structure, wherein the multilevel structure includes:
- a set of conducting polygons, the polygons each having the same number of sides;
- the polygons are electromagnetically coupled by means of either a capacitive coupling or ohmic contact;
- and
- a contact region between directly connected polygons is narrower than half of the perimeter of said polygons in at least seventy-five percent of said polygons defining the conducting ground plane.
9 more elements
An antenna system comprising:
- an antenna element;
- and
- a ground plane comprising:
- at least two conducting surfaces each having a plurality of sides defined by at least one edge;
- at least one conducting strip connecting the at least two conducting surfaces for allowing current to flow between the at least two conducting surfaces;
- the at least one conducting strip being narrower than the width of any of the at least two conducting surfaces;
- the ground plane being disposed in a plane substantially parallel to a plane of the antenna element;
- the ground-plane further comprising at least one of a space-filling-curve shape and a multilevel structure, the multilevel structure comprising a set of conducting polygons, the polygons each having the same number of sides;
- at least one of the conducting surfaces or at least one of the conducting strips of the ground plane is shaped as a space filling curve (SFC), the SFC including at least ten connected straight segments;
- and
- the at least ten connected straight segments are smaller than a tenth of the operating free-space wave length and are spatially arranged in such a way that no two adjacent and connected segments form another longer straight segment.
8 more elements
Dependencies are inferred from the claim text.