Planar antenna utilizing cascaded right-handed and...

Details Planar antenna utilizing cascaded right-handed and... Planar antenna utilizing cascaded right-handed and...

2007-07-31

2009-11-24

Owens, Douglas W (Department: 2821)

Communications: radio wave antennas

Antennas

Slot type

C343S749000, C343S7000MS

Reexamination Certificate

active

07623083

ABSTRACT:
A planar antenna structure is provided. The planar antenna includes a dielectric substrate, a ground plane, a first conductive pattern and a second conductive pattern. The dielectric substrate has a first surface and a second surface. The ground plane is on the second surface of the dielectric substrate. The first conductive pattern is on the first surface of the dielectric substrate, coupled to a feeding line. The second conductive pattern is on the second surface of the dielectric substrate, coupled to the ground plane. The first and second conductive patterns are coupled to serve as cascaded right- and left-handed transmission lines. The first and second conductive patterns include: a first lumped equivalent circuit of the right-handed transmission line; and a second lumped equivalent circuit of the left-handed transmission line, cascaded with the first lumped equivalent circuit, wherein the right- and left-handed transmission lines have electrical lengths with opposite signs respectively.

REFERENCES:
patent: 7006048 (2006-02-01), Chang
patent: 7446712 (2008-11-01), Itoh et al.

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