Antenna with active elements

Details Antenna with active elements Antenna with active elements

2010-09-29

2011-12-13

Le, Hoanganh (Department: 2821)

Communications: radio wave antennas

Antennas

Spiral or helical type

C343S7000MS

Reexamination Certificate

active

08077116

ABSTRACT:
A multi-frequency antenna comprising an IMD element, one or more active tuning elements and one or more parasitic elements. The IMD element is used in combination with the active tuning and parasitic elements for enabling a variable frequency at which the antenna operates, wherein, when excited, the parasitic elements may couple with the IMD element to change an operating characteristic of the IMD element.

REFERENCES:
patent: 5966097 (1999-10-01), Fukasawa et al.
patent: 7271770 (2007-09-01), Washiro
patent: 7372406 (2008-05-01), Shiotsu et al.
patent: 2003/0098812 (2003-05-01), Ying et al.
patent: 2006/0152411 (2006-07-01), Iguchi et al.

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