Low profile dipole antenna for use in wireless communications systems
First Claim
1. A dipole antenna for use in a wireless communication subscriber unit, comprising:
- a planar substrate made of dielectric material;
a conductive planar element disposed on one side of the substrate and located in an upper region of the one side and a feed strip connected thereto and extending from the conductive planar element to a bottom edge of the substrate and terminating at a bottom feed point; and
a conductive planar ground patch disposed on an opposite side of the substrate and located in a lower region of the opposite side, the conductive planar ground patch including a bottom end for facilitating connecting the ground patch to a ground plane aligned substantially orthonormal to the substrate;
wherein capacitive coupling between the planar element and the planar ground patch creates a junction which provides an upper dipole feed in a midregion of the antenna such that the conductive planar element acts as one element of an unbalanced dipole antenna and the conductive planar ground patch acts as a second element of the unbalanced dipole antenna to form a beam which may be positionally directed along a horizon that is substantially parallel to the ground plane.
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Accused Products
Abstract
A dipole antenna for use with a mobile subscriber unit in a wireless network communications system. The antenna is fabricated with printed circuit board (PCB) photo-etching techniques for precise control of the printed structure. The dipole antenna includes a planar substrate made of dielectric material. A conductive planar element is layered on one side of the substrate in an upper region of the substrate, and a conductive planar ground patch is layered on the other side of the substrate in a lower region of the substrate. That is, the conductive planar element is stacked above the conductive planar ground patch. A feed strip is connected to the bottom of the conductive planar element, and extends from the element to a bottom edge of the substrate and terminates at a bottom feed point. Typically, the feed point is connected to a transmission line for transmitting signals to and receiving signals from the dipole antenna. The conductive planar ground patch includes a bottom end for connecting the ground patch to a ground plane upon which the dipole antenna is mounted. The ground plane is aligned orthonormal to the antenna. Capacitive coupling between the conductive planar element and the conductive ground patch creates a junction which provides an upper dipole feed point in a mid-region of the substrate such that the conductive planar element acts as one element of an unbalanced dipole antenna and the conductive planar ground patch acts as the other element of the unbalanced dipole antenna. The unbalanced dipole antenna forms a beam which may be positionally directed along a horizon that is substantially parallel to the ground plane.
79 Citations
24 Claims
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1. A dipole antenna for use in a wireless communication subscriber unit, comprising:
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a planar substrate made of dielectric material;
a conductive planar element disposed on one side of the substrate and located in an upper region of the one side and a feed strip connected thereto and extending from the conductive planar element to a bottom edge of the substrate and terminating at a bottom feed point; and
a conductive planar ground patch disposed on an opposite side of the substrate and located in a lower region of the opposite side, the conductive planar ground patch including a bottom end for facilitating connecting the ground patch to a ground plane aligned substantially orthonormal to the substrate;
wherein capacitive coupling between the planar element and the planar ground patch creates a junction which provides an upper dipole feed in a midregion of the antenna such that the conductive planar element acts as one element of an unbalanced dipole antenna and the conductive planar ground patch acts as a second element of the unbalanced dipole antenna to form a beam which may be positionally directed along a horizon that is substantially parallel to the ground plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification