Dual band antenna for vehicles
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 1, 2000
Issued Date -
N/A
app pub date -
Nov 3, 1998
filing date -
Nov 3, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dual band slot antenna for cellular telephone and GPS frequency bands. The antenna is a slot antenna formed in a conductive layer laminated to a layer of a windshield or other transparency. The slot is formed along two adjoining arcs of a circle extending oppositely from a feedpoint, with a portion of the conductive layer interposed between the ends of the slots. The two slot legs have different lengths so the slot is tuned to exhibit at least two resonant peaks, such as one at the cellular telephone frequency band and the other at the GPS frequency band. The slot is fed by strip line transmission lines or capacitive coupling, using additional conductive film patches spaced by one or more layers of the window, with the window layer forming a dielectric.
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Cited Art Landscape
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