High performance low cost monopole antenna for wireless applications
First Claim
Patent Images
1. A printed monopole antenna, comprising:
- a substrate having a first surface and an opposed second surface;
an elongated first resonant portion formed on said first surface and defining a first axis in a longitudinal direction;
a second resonant portion formed on said first surface and having a center piece, defining a second axis, and first and second elongated end pieces forming an angle with said second axis, said second resonant portion extending from said first resonant portion, wherein said second axis is positioned at an angle with said first axis and an outer edge of each of said first and second end pieces is disposed proximate respective edges of said substrate; and
a ground plane formed on said second surface.
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Abstract
A monopole antenna, a monopole antenna system and a data communication device are disclosed in which a high isotropic radiation characteristic is achieved with a minimum substrate area occupied by the antenna. To this end, a substantially T-shaped monopole design is used, wherein end portions of one of the resonating paths are oriented in conformity with respective edges of a substrate.
115 Citations
27 Claims
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1. A printed monopole antenna, comprising:
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a substrate having a first surface and an opposed second surface; an elongated first resonant portion formed on said first surface and defining a first axis in a longitudinal direction; a second resonant portion formed on said first surface and having a center piece, defining a second axis, and first and second elongated end pieces forming an angle with said second axis, said second resonant portion extending from said first resonant portion, wherein said second axis is positioned at an angle with said first axis and an outer edge of each of said first and second end pieces is disposed proximate respective edges of said substrate; and a ground plane formed on said second surface. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A printed monopole antenna system, comprising;
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a substrate having opposed surfaces; a first monopole antenna formed on one of said opposed surfaces and having a first elongated resonant portion and a second resonant portion extending from said first elongated portion to form an angle with a first axis extending along the longitudinal direction of said first resonant portion, said second resonant portion being symmetric with respect to said first axis; a second monopole antenna formed on one of said opposed surfaces having a second elongated portion defining a second axis that forms an angle with said first axis; a first ground plane formed on the other one of said opposed surfaces on which said first monopole antenna is formed; and a second ground plane formed on the other one of said opposed surfaces on which said second monopole antenna is formed. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A data communication device, comprising:
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a substrate having a first surface and an opposed second surface; a first printed monopole antenna comprising; an elongated first resonant portion formed on said first surface and defining a first axis in a longitudinal direction; a second resonant portion formed on said first surface and having a center piece defining a second axis and first and second elongated end pieces forming an angle with said second axis, said second resonant portion extending from said first resonant portion, wherein said second axis is positioned at an angle with said first axis and an outer edge of each of said first and second end pieces is disposed proximate respective edges of said substrate; and a ground plane formed on said second surface; and a drive circuit formed on said substrate, said drive circuit being connected to said first printed monopole antenna. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification