US 7,071,880 B2Granted

Dual band patch antenna

AssigneeMediatek Incorporation

InventorsMing-Chou Lee, Jan-Kwo Leeng, Tsung-Liang Lin

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Abstract

An antenna structure has a substrate, having a first-side surface and a second-side surface. A first antenna substructure on the first-side surface has a first straight metal line and a second straight metal line. The second straight metal line joins to the first straight metal line, and is substantially perpendicular to the first straight metal line. A second antenna substructure disposed on the second-side surface has a metal plate, serving as a ground, wherein the first straight metal line is overlapping with the metal plate. An L-shape metal line protrudes from the metal plate, wherein a portion of the L-shape metal line is parallel and overlapping with the second straight metal line, and a portion of the L-shape metal line is parallel to the first straight metal line without overlapping.

Claims20

Dependent claims

An antenna structure, suitable for a dual-band operation, the antenna structure comprising:

a substrate, having a first-side surface and a second-side surface;
a first antenna substructure, disposed on the first-side surface, wherein the first antenna substructure comprises:
a first straight metal line, wherein the straight metal line has one end as an external connection end, and another end as a radiating end;
and
a second straight metal line, joining to the first straight metal line at the radiating end, substantially perpendicular to the first straight metal line;
and
a second antenna substructure, disposed on the second-side surface, wherein the second antenna substructure comprises:
a metal plate, serving as a ground plate, wherein the first straight metal line is overlapping with the metal plate;
and
a L-shape metal line, protruding from the metal plate, wherein a portion of the L-shape metal line is parallel and overlapping with the second straight metal line, and a portion of the L-shape metal line is parallel to the first straight metal line without overlapping.

7 more elements

An antenna structure, suitable for use in a dual-band operation, the antenna structure comprising:

a substrate, having a first-side surface and a second-side surface;
a first antenna substructure, disposed on the first-side surface, wherein the first antenna substructure comprises a first L-shape metal line with a first-part line and a second-part line joined at a point portion;
a second antenna substructure, disposed on the second-side surface, wherein the second antenna substructure comprises:
a metal plate, serving as a ground, wherein a portion of the first-part line of the first L-shape metal line is overlapping with the metal plate;
and
a second L-shape metal line, extending out from the metal plate, wherein a portion of the second L-shape metal line is parallel and overlapping with the second-part line of the first L-shape metal line, and a portion of the L-shape metal line is parallel to the first-part line of the first L-shape metal line without overlapping.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/908,025Filed 26 Apr 2005 · us provisional application
Priority: 27 Apr 2004
Published: US 2005/0237240 A127 Oct 2005
Granted: 4 Jul 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H01Q 1/243
Specially adapted for hand-held use: with built-in antennas
H01Q 5/357
For different propagation modes: using a single feed point
H01Q 9/42
With feed to end of elongated active element, e.g. unipole: with folded element, the folded parts being spaced apart a small fraction of the…
H01Q
Antennas, i.e. radio aerials