US 2009/0015487 A1Published application

Multiband antenna

AssigneesTsinghua University, Hon Hai Precision Industry Co., Ltd.

InventorsWen-Hua Chen, Xin Wang, Zheng-He Feng

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Abstract

A multiband antenna includes a long radiating branch, a short radiating branch, a short strip, a feed point, a grounding portion, a connecting portion, a long parasitic strip, and a short parasitic strip. The feed point, the long radiating branch, the short radiating branch, and the short strip are in a first plane. The grounding portion connects to the short strip. The connecting portion connects the long radiating branch, the short radiating branch, and the short strip. The long radiating branch, the short strip, and the connecting portion form a first inverted-L shaped antenna structure. The short radiating branch, the short strip, and the connecting portion form a second inverted-L shaped antenna structure. The long parasitic strip and the short parasitic strip are in a second plane and respectively connected to the grounding portion. The first plane is parallel to the second plane.

Claims7

Dependent claims

A multiband antenna comprising:

a long radiating branch in a first plane;
a short radiating branch in the first plane;
a short strip in the first plane;
a feed point in the first plane;
a grounding portion connected to the short strip;
a connecting portion connecting the long radiating branch, the short radiating branch, and the short strip;
the long radiating branch, the short strip, and the connecting portion forming a first inverted-L shaped antenna structure to receive lower band signals;
and the short radiating branch, the short strip, and the connecting portion forming a second inverted-L shaped antenna structure to receive upper band signals;
a long parasitic strip in a second plane parallel to the first plane, connected to the grounding portion, and working with the long radiating branch to extend a lower bandwidth of the lower band signals;
and
a short parasitic strip in the second plane, connected to the grounding portion, and working with the short radiating branch to extend an upper bandwidth of the upper band signals.

8 more elements

Dependencies are inferred from the claim text.