Adjustable antenna

Communications: radio wave antennas – Antennas – With radio cabinet

Reexamination Certificate

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C343S787000

Reexamination Certificate

active

06856293

ABSTRACT:
Antenna structure (200) which finds particular utility in mobile stations and the electrical characteristics of which can be electrically modified. The radiating element (210) of the antenna or a part thereof is manufactured from a strongly magnetostrictive material. The antenna is equipped with at least one electromagnet (220) by means of which a magnetic field (ψ) can be generated into the magnetostrictive material. This causes the radiating element to grow (Δl) in a certain direction, whereby the resonance frequency of the antenna will decrease. The antenna can be electrically adjusted without adding any component in the antenna itself, thereby making the adjustment reliable.

REFERENCES:
patent: 3811128 (1974-05-01), Munson
patent: 4751513 (1988-06-01), Daryoush et al.
patent: 5327148 (1994-07-01), How et al.
patent: 5589842 (1996-12-01), Wang et al.
patent: 5982335 (1999-11-01), Faraone et al.
patent: 6292143 (2001-09-01), Romanofsky
patent: 6791496 (2004-09-01), Killen et al.
patent: 0 884 707 (1998-12-01), None
patent: 0 899 702 (1999-03-01), None
P.J. Rainville and F.J. Harackiewicz, “Magnetic Tuning of a Microtrip Patch Antenna Fabricated on a Ferrite Film”, IEEE Microwave and Guided Wave Letters, vol. 2, No. 12, Dec. 1992. pp. 483-485.

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