US 2003/0080905 A1 · Dual band antenna

Abstract

A dual band antenna (1) includes a printed wiring board (PWB) (20). The PWB has an antenna trace (10) and a grounding plate (30) respectively disposed on opposite surfaces (20a, 20b) of the PWB. The antenna trace includes a radiating arm (100) and a matching means (13). The radiating arm includes a meandering segment (12) and a linking segment (11). The linking segment links two points of the meandering segment, thereby forming a closed loop. Because of the closed loop, the radiating arm has two transmission paths, one longer path, which does not include the linking segment, and one shorter path, which does include the linking segment. The dual band antenna, therefore, is capable of operating at two different frequency bands because of the two paths of the radiating arm.

Claims14

Dependent claims

A multiple band antenna comprising:

a printed wiring board (PWB) comprising opposite first and second surfaces;
an antenna trace disposed on the first surface of the PWB and comprising a radiating arm and a feed point, said radiating arm comprising at least one closed loop to form at least two transmission paths, said feed point defined through said PWB;
and
a grounding plate disposed on the second surface of the PWB.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/032,247Filed 21 Dec 2001

Priority

TW 9021839426 Oct 2001

Published

1 May 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

H01Q 1/38
Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith: formed by a conductive layer on an…
H01Q 1/243
Specially adapted for hand-held use: with built-in antennas
H01Q 5/371
Creating multiple current paths: branching current paths
H01Q
Antennas, i.e. radio aerials

Dual band antenna

Life of this patent

Dual band antenna

Life of this patent

Abstract

Claims14