Dual-layer planar antenna
AssigneeAGC Automotive Americas R&D, Inc.
InventorsQian Li, Wladimiro Villarroel
Life of this patent
Estimating the term…
Abstract
An antenna for receiving an RF signal from a satellite is preferably integrated with a window of a vehicle. The window preferably includes a first nonconductive pane and a second nonconductive pane laminated together with a PVB adhesive layer. A first conductive layer is disposed on one of the surfaces of the nonconductive panes and a second conductive layer is disposed on another of the surfaces of the nonconductive panes. The second conductive layer includes a main slot extending thereinto. The main slot defines a feed line region and ground plane regions. The second conductive layer also includes stub slots extending into the ground plane regions for antenna impedance matching and providing the antenna with a circular polarization.
Claims43
A window having an integrated antenna, said window comprising:
- a first nonconductive pane having an outside surface and an inner surface;
- a second nonconductive pane disposed generally parallel to and spaced from said first nonconductive pane and having an outer surface and an inside surface;
- a first conductive layer disposed on one of said surfaces;
- a second conductive layer disposed on another of said surfaces and overlapping said first conductive layer, said second conductive layer having a main slot extending thereinto to define a feed line region and dividing said second conductive layer into a first ground plane region and a second ground plane region;
- and
- a conductive segment electrically connecting said first ground plane region to said second ground plane region,
- said second conductive layer further having a first stub slot extending from said main slot into said first ground plane region and a second stub slot extending from said main slot into said second ground plane region.
An antenna comprising:
- a first conductive layer;
- a second conductive layer spaced from and substantially parallel to and overlapping said first conductive layer;
- said second conductive layer having a main slot extending thereinto to define a feed line region and dividing said second conductive layer into a first ground plane region and a second ground plane region;
- a conductive segment electrically connecting said first ground plane region to said second ground plane region;
- and
- said second conductive layer defining a first stub slot extending from said main slot into said first ground plane region and a second stub slot extending from said main slot into said second ground plane region.
A window having an integrated antenna, said window comprising:
- a first pane of glass having an outside surface and an inner surface;
- a second pane of glass disposed generally parallel to and spaced from said first nonconductive pane and having an outer surface and an inside surface;
- a first conductive layer disposed on one of said surfaces;
- a second conductive layer disposed on another of said surfaces and overlapping said first conductive layer, said second conductive layer having a main slot extending thereinto to define a feed line region and dividing said second conductive layer into a first ground plane region and a second ground plane region, and
- a conductive segment electrically connecting said first ground plane region to said second ground plane region.
A method of obtaining a desired polarization of an antenna having a first conductive layer, a second conductive layer space from and substantially parallel to and overlapping the first conductive layer, the second conductive layer defining a feed line region and dividing the second conductive layer into a first ground plane region and a second ground plane region, the second conductive layer further defining a slot extending from the main slot into the first ground plane region and a slot extending from the main slot into the second ground plane region, said method comprising the step of:
- defining a first stub slot extending from the main slot into the first ground plane region at a first angle relative to the main slot and a second stub slot extending from the main slot into the second ground plane region at a second angle relative to the main slot.
Dependencies are inferred from the claim text.