Dual band antenna for vehicles

Details Dual band antenna for vehicles Dual band antenna for vehicles

1998-11-03

2000-08-01

Wong, Don

Communications: radio wave antennas

Antennas

Slot type

343713, 343711, 343700MS, H01Q 148

Patent

active

060973455

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.

REFERENCES:
patent: 2508085 (1950-05-01), Alford
patent: 4063246 (1977-12-01), Greiser

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