Multi-frequency antenna

Details Multi-frequency antenna Multi-frequency antenna

2011-05-10

2011-05-10

Phan, Tho G (Department: 2821)

Communications: radio wave antennas

Antennas

Spiral or helical type

C343S866000

Reexamination Certificate

active

07940229

ABSTRACT:
A portable electronic device with function of receiving and radiating radio frequency (RF) signal and a multi-frequency antenna thereof are disclosed. The portable electronic device comprises a RF module and a multi-frequency antenna connecting to the RF module. The multi-frequency antenna comprises a helix element and a coaxial cable disposed within the helix element. The helix element comprises a first helix portion and a second helix portion adjacent to each other, and the coaxial cable comprises a grounding portion and a radiating portion. The first helix portion covers the grounding portion, and the radiating portion is disposed within the second helix portion separated with each other.

REFERENCES:
patent: 3852759 (1974-12-01), Felsenheld et al.
patent: 4494117 (1985-01-01), Coleman
patent: 5317327 (1994-05-01), Piole
patent: 5668559 (1997-09-01), Baro
patent: 6011525 (2000-01-01), Piole
patent: 6112102 (2000-08-01), Zhinong
patent: 6140973 (2000-10-01), Annamaa et al.
patent: 6288681 (2001-09-01), Kim et al.
patent: 2004/0017327 (2004-01-01), Petropoulos

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