Multi-band antennas

Details Multi-band antennas Multi-band antennas

2005-03-15

2005-03-15

Ho, Tan (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S795000, C343S846000

Reexamination Certificate

active

06867736

ABSTRACT:
Multi-band antenna systems (116, 1100,1200) for wireless communication devices (100) for use in wireless communications systems (1300) are disclosed. The multi-band antennas systems include a conductive film (204, 1104, 1204) that include ground plane areas (206, 1106, 1206) and conductive traces (208, 1108, 1208) that substantially circumscribe areas that include a plurality of interconnected swaths (222-230, 1116-1120, 1216-1220). The antenna systems are capable of operating in a first common mode for supporting communications in a first frequency band, and in a second common mode and differential mode for supporting communications in a second frequency band. Nulls of gain patterns of the second common and differential mode are offset, such that sum of the gain patterns does not include nulls.

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