Antenna with active elements
First Claim
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1. An antenna arrangement for a wireless device, comprising;
- an IMD element disposed on a substrate;
a first parasitic element having an elongated portion extending from a first vertical connector to a first free end;
a second parasitic element connected to said first parasitic element, said second parasitic element having an elongated portion extending from a second vertical connector to a second free end; and
one or more active tuning elements located on the parasitic elements for adjusting the frequency response of the antenna;
wherein said second parasitic is disposed above said first parasitic for providing multiple levels of tuning; and
wherein said first and second parasitic elements are adapted to alter a field generated by the IMD element.
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Abstract
A multi-frequency antenna comprising an IMD element, active tuning elements and 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.
152 Citations
6 Claims
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1. An antenna arrangement for a wireless device, comprising;
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an IMD element disposed on a substrate; a first parasitic element having an elongated portion extending from a first vertical connector to a first free end; a second parasitic element connected to said first parasitic element, said second parasitic element having an elongated portion extending from a second vertical connector to a second free end; and one or more active tuning elements located on the parasitic elements for adjusting the frequency response of the antenna; wherein said second parasitic is disposed above said first parasitic for providing multiple levels of tuning; and wherein said first and second parasitic elements are adapted to alter a field generated by the IMD element. - View Dependent Claims (2, 3, 4, 5)
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6. An antenna arrangement for a wireless device, comprising:
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a first active tuning element positioned on an antenna element, and a second active tuning element positioned on a parasitic element, wherein the first active tuning element provides adjustment of the antenna frequency, and wherein the second active tuning element provides adjustment of the coupling between the antenna element and the parasitic element.
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Specification