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US 9,325,067 B2Granted
Tunable multiband multiport antennas and method
AssigneeBlackBerry Limited
InventorsShirook M. Ali, Mark E. Pecen, James Paul Warden
Life of this patent
Estimating the term…
Abstract
An antenna, comprising a plurality of feed points and tuning elements for tuning a resonant frequency at each feed point independently of the others of the plurality of feed points. The tuning elements are placed on the configured radiating element such that for a given feed point its tuning element is placed on the configured radiating element where a current distribution of the other feed points is a minimum.
Claims18
An antenna, comprising:
- a radiation element having at least one adjustable tuning element positioned on the radiation element, the radiation element configured to resonate at a fundamental frequency when excited at a first feed point;
- a second feed point positioned on the configured radiation element, the position of the second feed point located at a current distribution maxima of a harmonic of the fundamental frequency;
- and
- the at least one adjustable tuning element positioned on said radiation element at a location displaced along said radiation element from said first and second feed point locations so that adjustment of a value of said tuning element tunes a resonant frequency of the second feed point with no effect on the resonant frequency of the first feed point.
1 more element
A method for an antenna comprising:
- configuring a radiation element to resonate at a fundamental frequency when excited at a first feed point, the radiation element having at least one adjustable tuning element positioned on the radiation element;
- positioning a second feed point on the configured radiation element, the position of the second feed point located at a current distribution maxima of a harmonic of the fundamental frequency;
- placing the at least one adjustable tuning element on the configured radiating element at a location displaced along said radiation element from said first and second feed point locations;
- and
- adjusting said tuning element value to tune a resonant frequency of the second feed point with no effect on the resonant frequency of the first feed point.
2 more elements
Dependencies are inferred from the claim text.