Antenna

Details Antenna Antenna

2009-05-15

2011-10-25

Duong, Dieu H (Department: 2821)

Communications: radio wave antennas

Antennas

Spiral or helical type

C343S7000MS

Reexamination Certificate

active

08044877

ABSTRACT:
An antenna includes a substrate having a first layer, a second layer, a third layer and a fourth layer, and an antenna unit having a first pattern being of a substantially coiled shape and printed on the first layer, a second pattern being of a meandering shaped and printed on the second layer, a third pattern being of a meandering shaped and printed on a third layer, and a fourth pattern being of a substantially coiled shaped and printed on the fourth layer. The first pattern, the second pattern, the third pattern and the fourth pattern are of a serial connection. The free end of the first pattern connects a feeding point. The free end of the fourth pattern connects a grounding point. Thus, the antenna has advantages of compact size and low cost, due to the antenna unit printed on the substrate and the pattern of the antenna unit.

REFERENCES:
patent: 5870066 (1999-02-01), Asakura et al.
patent: 6018298 (2000-01-01), Endo et al.
patent: 2008/0111742 (2008-05-01), Chao et al.

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