Triple band GPS trap-loaded inverted L antenna array

Details Triple band GPS trap-loaded inverted L antenna array Triple band GPS trap-loaded inverted L antenna array

2005-02-15

2005-02-15

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S722000, C343S749000

Reexamination Certificate

active

06856287

ABSTRACT:
The antenna includes four elements excited with equal amplitudes but with a relative phase difference of 0°, −90°, −180°, and −270°. Each element includes a vertical and horizontal portion. An RF trap filter is located within the horizontal portion so that the antenna provides good gain coverage at all three frequency bands of a modernized global positioning system.

REFERENCES:
patent: 3622890 (1971-11-01), Fujimoto et al.
patent: 5138651 (1992-08-01), Sudo
patent: 5349361 (1994-09-01), Egashira et al.
patent: 6323821 (2001-11-01), McLean
patent: 6483463 (2002-11-01), Kadambi et al.
patent: 6720935 (2004-04-01), Lamensdorf et al.
patent: 6734828 (2004-05-01), Shor

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