Antenna
First Claim
1. In an antenna having an electrical reference plane and a planar conductive element having a length and a width, a system for providing multiple resonant frequencies comprising:
- a first coupling means for coupling said electrical reference plane to said planar conductive element at a position on said planar conductive element to define a first antenna resonant frequency;
a second coupling means for coupling said electrical reference plane to said planar conductive element at a position on said planar conductive element to define a second antenna resonant frequency, said second coupling providing a high impedance path between the electrical reference plane and the planar conductive element at the first resonant frequency and a lower impedance path between the electrical reference plane and the planar conductive element at said second resonant frequency; and
wherein the first and second coupling means are spaced apart a distance, said distance being substantially the length of the planar conductive element and causing mutually deflecting currents to flow from each of the two coupling means to define said second resonant frequency.
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Accused Products
Abstract
An antenna comprising an electrical reference plane; a planar conductive element, the electrical reference plane and planar conductive element being electrically coupled via a first coupling means to define a first antenna resonant frequency; and a second coupling means arranged to provide a high impedance path between the electrical reference plane and the planar conductive element at the first resonant frequency and a lower impedance path between the electrical reference plane and planar conductive element at a second frequency to define a second antenna resonant frequency.
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Citations
13 Claims
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1. In an antenna having an electrical reference plane and a planar conductive element having a length and a width, a system for providing multiple resonant frequencies comprising:
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a first coupling means for coupling said electrical reference plane to said planar conductive element at a position on said planar conductive element to define a first antenna resonant frequency;
a second coupling means for coupling said electrical reference plane to said planar conductive element at a position on said planar conductive element to define a second antenna resonant frequency, said second coupling providing a high impedance path between the electrical reference plane and the planar conductive element at the first resonant frequency and a lower impedance path between the electrical reference plane and the planar conductive element at said second resonant frequency; and
wherein the first and second coupling means are spaced apart a distance, said distance being substantially the length of the planar conductive element and causing mutually deflecting currents to flow from each of the two coupling means to define said second resonant frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of providing multiple resonant frequencies for an antenna, said antenna having an electrical reference plane and a planar conductive element, said planar conductive element having a length and a width, said method comprising the steps of:
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coupling said electrical reference plane to said planar conductive element at a first position on said planar conductive element to provide a first antenna resonant frequency;
coupling said electrical reference plane to said planar conductive element at a second position on said planar conductive element to provide a second antenna resonant frequency, said coupling at said second position providing a high impedance path between the electrical reference plane and the planar conductive element at the first resonant frequency and a lower impedance path between the electrical reference plane and the planar conductive element at said second resonant frequency; and
wherein the first and second coupling means are spaced apart a distance , said distance being substantially the length of the planar conductive element and causing mutually deflecting currents to flow from each of the two coupling means, to define said second resonant frequency.
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13. An antenna comprising an electrical reference plane;
- and a planar conductive element having a length and a width, the electrical reference plane and planar conductive element being electrically coupled via a first coupling means to define a first antenna resonant frequency; and
a second coupling means comprising a filter constructed to provide a high impedance path between the electrical reference plane and the planar conductive element at the first resonant frequency and a lower impedance path between the electrical reference plane and planar conductive element at a second resonant frequency, wherein the first and second coupling means are spaced apart at a distance, said distance being substantially the length of the planar conductive element and causing mutually deflecting currents to flow from each of the two coupling means to define said second antenna resonant frequency.
- and a planar conductive element having a length and a width, the electrical reference plane and planar conductive element being electrically coupled via a first coupling means to define a first antenna resonant frequency; and
Specification