Slot antenna having a MEMS varactor for resonance frequency...

Communications: radio wave antennas – Antennas – Slot type

Reexamination Certificate

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C343S767000, C343S768000

Reexamination Certificate

active

07348928

ABSTRACT:
Briefly, in accordance with one embodiment of the invention, a slot antenna may include a primary slot and one or more secondary slots. The size of the antenna may be reduced by adding one or more of the secondary slots which may add additional inductance to the antenna. Furthermore, the size of the antenna may be reduced by increasing the inductance of the secondary slots via increasing the length of the slots or by changing the shape of the slots. The antenna may include one or more MEMS varactors coupled to one or more of the secondary slots. The resonant frequency of the slot antenna may be tuned to a desired frequency by changing the capacitance value of one or more of the MEMS varactors to a desired capacitance value.

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Carrasquillo-Rivera H et al.: “Tunable and dual-band rectangular slot-ring antenna”; IEEE Antennas and Propagation Society Symposium,; Jun. 20, 2004; pp. 308-4311; vol. 4; XP010722481.
Behdad N et al: “Bandwidth Enhancement and Futther Size Reduction of a Class of Miniaturized Slot Antennas”; IEEE Transactions on Antennas and Propagation,; vol. 52, No. 8, Aug. 2004; pp. 1928-1935, XP001200688.
Carrasquillo-Rivera H et al.: “Tunable slot antenna using varactors and photodiodes” IEEE Antennas and Propagation Society Symposium. 2003 Digest.; Jun. 22, 2003, vol. 4 of 4, pp. 532-535, XP010650852.
PCT Internation Search Report and Written Opinion of the ISA; Application No. PCT/US2005/044776; Filing Date: Dec. 9, 2005.

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