Title:
【発明の名称】2重帯域アンテナ
Document Type and Number:
Japanese Patent JP2000509581
Kind Code:
A
Abstract:
A novel and improved dual band antenna system comprising an inner antenna element surrounded by an outer antenna element. In a first embodiment, the inner antenna element radiates and receives RF signals in a first RF band, and the outer antenna element radiates and receives RF signals in a second RF band. Optionally, the inner and outer antennas may be coupled together when operating in the first RF band in order to improve the antenna gain pattern of the dual band antenna. In a second embodiment, the inner antenna element radiates and receives RF signals in both the first and second RF bands. In this second embodiment, when operating in the second RF band, the outer antenna element is grounded, thus altering the signal length of the inner antenna element to resonate in the second RF band.
Inventors:
Maldonado, David
Application Number:
JP53913097A
Publication Date:
July 25, 2000
Filing Date:
April 28, 1997
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H01Q5/00; H01Q5/10; H01Q5/40; H01Q9/30; H01Q21/30; (IPC1-7): H01Q21/30; H01Q9/30
Attorney, Agent or Firm:
Takehiko Suzue (4 outside)