Tunable multiband multiport antennas and method
First Claim
Patent Images
1. 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.
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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.
183 Citations
18 Claims
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1. An antenna, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for an antenna comprising:
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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. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification