Tunable capacitively-loaded magnetic dipole antenna
First Claim
1. A frequency-tunable capacitively-loaded magnetic dipole antenna, the antenna comprising:
- a transformer loop having a balanced feed interface; and
a capacitively-loaded magnetic dipole radiator connected to the transformer loop, the capacitively-loaded magnetic dipole radiator having a tunable effective electrical length and including at least a quasi loop with a selectively connectable auxiliary loop section.
2 Assignments
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Accused Products
Abstract
A frequency-tunable capacitively-loaded magnetic dipole antenna includes a transformer loop having a balanced feed interface, and a capacitively-loaded magnetic dipole radiator with a tunable effective electrical length. In one embodiment, the capacitively-loaded magnetic dipole radiator includes a tunable electric field bridge. For example, the capacitively-loaded magnetic dipole radiator may comprise a quasi loop with a tunable electric field bridge interposed between the quasi loop first and second ends. The electric field bridge may be an element such as a ferroelectric (FE) tunable capacitor or a microelectromechanical system (MEMS) capacitor, to name a couple of examples. In certain embodiments, the capacitively-loaded magnetic dipole radiator includes a quasi loop with a loop perimeter. The effective electrical length of the radiator is changed by adjusting the perimeter using an element such as a MEMS switch, or a semiconductor switch.
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Citations
20 Claims
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1. A frequency-tunable capacitively-loaded magnetic dipole antenna, the antenna comprising:
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a transformer loop having a balanced feed interface; and a capacitively-loaded magnetic dipole radiator connected to the transformer loop, the capacitively-loaded magnetic dipole radiator having a tunable effective electrical length and including at least a quasi loop with a selectively connectable auxiliary loop section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A wireless telephone communications device with a frequency-tunable capacitively-loaded magnetic dipole antenna, the device comprising:
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a housing; a telephone transceiver embedded in the housing; and a balanced feed capacitively-loaded magnetic dipole antenna having a radiator with frequency-tunable electrical length, the radiator including at least a quasi loop with a selectively connectable auxiliary loop section. - View Dependent Claims (16, 17)
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18. A method for frequency tuning a capacitively-loaded magnetic dipole antenna, the method comprising:
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providing a capacitively-loaded magnetic dipole antenna with a transformer loop having a balanced feed interface, the capacitively-loaded magnetic dipole antenna further including at least a capacitively-loaded magnetic dipole radiator connected to the transformer loop, the capacitively-loaded magnetic dipole radiator including at least a quasi loop with a selectively connectable auxiliary loop section; varying the effective electrical length of the radiator; and in response to varying the effective electrical length of the radiator, changing the antenna operating frequency. - View Dependent Claims (19, 20)
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Specification