Antenna unit

Details Antenna unit Antenna unit

2007-04-27

2008-10-21

Phan, Tho G (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S749000

Reexamination Certificate

active

07439914

ABSTRACT:
An antenna unit has a first antenna operating at wireless telecommunication bands and a second antenna operating at wireless local area network bands. The first antenna has a first radiating conductor with a first feeding point defining opposite sides, a second, a third and a fourth radiating conductors extending from both sides of the first radiating conductor. A parasitic element defines opposite ends. One end of the parasitic element confronts the free end of the third radiating conductor. A trap circuit connects the fourth radiating conductor and the parasitic element. A second antenna has a third side, a fourth side and a stair-shape side. The connection of the sides of the second antenna forms a first protrusion with a second feeding point and a second protrusion confronting the first antenna. A slot is opened on the second antenna. A ground portion is spaced from the first radiating conductor and the first protrusion.

REFERENCES:
patent: 2967300 (1961-01-01), Haughawout
patent: 6337667 (2002-01-01), Ayala et al.
patent: 6639564 (2003-10-01), Johnson
patent: 6734828 (2004-05-01), Shor
patent: 6759990 (2004-07-01), Rossman
patent: 7292200 (2007-11-01), Posluszny et al.

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