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US 2004/0164916 A1Published application
Multi-frequency wire-plate antenna
AssigneeCentre National de le Recherche Scientifique (CNRS)
InventorsBernard Jecko, Mohamed Hammoudi
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AssigneeCentre National de le Recherche Scientifique (CNRS)
InventorsBernard Jecko, Mohamed Hammoudi
Estimating the term…
The invention relates to an antenna comprising: a first electroconductive surface (120); a second electroconductive surface (140) which forms a ground plane and is parallel to the first; a first electroconductive feed belt or wire (150) connecting a first terminal of a generator/receiver to the first surface (120), the second surface (140) being connected to the second terminal of the generator/receiver; and at least one second electroconductive wire or ribbon (160) connecting said two surfaces (120,140). The antenna is characterized in that the first surface (120) comprises a blank (122), or a series of blanks (122), each blank optionally consisting of mutually extending sections. Said blank(s) (122) extend in the vicinity of and along part of the edge of the first surface (120) which is broad enough for the blank(s) (122) to define an inner area (126) of the first surface (120) by substantially forming a majority of the periphery of this area (126), thereby obtaining a multi-frequency wire-plate operation.
A wire-plate antenna of the type comprising:
The antenna as claimed in any one of the preceding claims, characterized in that the first surface (120) has a cutout-slot formed of two sections (122) each having the shape of a C, the open parts of which face each other.
The antenna as claimed in any one of the preceding claims, characterized in that the first surface (120) has at least two cutout-slots (122) each having respective shapes that are sufficiently similar in order that these two cutout-slots (122) generate two peaks of electromagnetic effectiveness on the wire-plate mode, mixed at the same frequency.
The antenna as claimed in any one of the preceding claims, characterized in that the first surface (120) is defined by any type of shape, and in that the cutout-slot or cutout-slots (122) remain parallel to the edge of this shape.
The antenna as claimed in any one of the preceding claims, characterized in that one of the surfaces forming the ground plane includes one or more cutout-slots of the same type as for the first surface (120).
The antenna as claimed in any one of the preceding claims, characterized in that it includes one or more dielectric or magnetic layers (130) between the surface forming the ground plane (140) and the first surface (120) and also above the two surfaces (radome).
The antenna as claimed in any one of the preceding claims, characterized in that it comprises superposed top parts and intermediate planes, the cutout-slots (122) being made in any intermediate plane, and dielectric or magnetic materials being interposed for rigidity or tunability.
Dependencies are inferred from the claim text.