Multi-band window antenna
AssigneePittsburgh Glass Works, LLC
InventorDavid Dai
Life of this patent
Estimating the term…
Abstract
A window antenna wherein three embedded wires are laminated inside a glazing and a connector is attached to the joint end of the first and second wires and a signal input. The second antenna wire is longer and resonates at a lower frequency than the first antenna wire. A third antenna wire is a parasitic L-shape wire with part of the wire in close distance to the open end of the second antenna wire. The third antenna wire is electromagnetically coupled to the second antenna wire in the near field so that the antenna may support an additional resonance to provide multiband and wideband performance.
Claims21
A glazing for use with an electrically conductive frame that defines a portal surface, said glazing comprising:
- at least one ply having oppositely disposed surfaces, said at least one ply also having an outer edge that is located between said oppositely disposed surfaces of said ply and that defines the lateral shape of said oppositely disposed surfaces;
- an interlayer having oppositely disposed surfaces, said interlayer also having an outer edge that is located between said oppositely disposed surfaces of said interlayer with one surface of said oppositely disposed surfaces of said interlayer facing one of said oppositely disposed surfaces of said at least one ply;
- a first antenna wire that is located on at least one of said at least one ply and said interlayer, said first antenna wire having a first longitudinal segment that defines a first end and a second longitudinal segment is joined to said first longitudinal segment and that defines a terminal end of said first antenna wire, the second longitudinal segment of said first antenna wire being oriented with respect to the first longitudinal segment of said first antenna wire such that at least a portion of the second longitudinal segment of said first antenna wire is oriented in non-parallel relationship to the first longitudinal segment of said first respective antenna wire
- a second antenna wire that is located on at least one of said at least one ply and said interlayer, said second antenna wire having a first longitudinal segment that defines a first end and a second longitudinal segment that is joined to said first longitudinal segment of said second antenna wire and that defines a terminal end of said second antenna wire, said second longitudinal segments of said second antenna wire being oriented to the first longitudinal segment of said second antenna wire such that at least a portion of said second longitudinal segment of said second antenna wire is oriented in non-parallel relationship to the first longitudinal segment of said second antenna wire, the length of said second antenna wire corresponding to a preselected wavelength;
- a third antenna wire having a first terminal end and a second terminal end that located at the opposite end of said third antenna wire from the first terminal end, at least a portion of said third antenna wire being oriented parallel to at least a portion of the second longitudinal segment of said second antenna wire, said portion of said third antenna wire that is parallel to the second longitudinal segment of said second antenna wire being spaced laterally apart from said second longitudinal segment of said second antenna such that said third antenna wire is electrically parasitic to electrical signals in the second longitudinal segment of said second antenna wire, the length of said third antenna wire between said first terminal end and said second terminal end corresponding to the wavelength of a preselected order of a harmonic of the second antenna wire;
- and
- at least one electrically conductive connector that has one end that is electrically connected to at least one of the first end of said first antenna wire and the first end of said second antenna wire, said at least one electrically conductive connector and having an opposite end that extends across of the outer edge of said at least one ply and the outer edge of said interlayer.
The window antenna of claim 19 wherein each of said antennas is respectively tuned to a different frequency band.
Dependencies are inferred from the claim text.