Communications: radio wave antennas – Antennas – Body-attached or connected
Patent
1995-03-02
1997-04-29
Le, Hoanganh T.
Communications: radio wave antennas
Antennas
Body-attached or connected
343787, 343788, H01Q 100, H01Q 708
Patent
active
056253664
ABSTRACT:
Apparatus and method for producing a flexible antenna suitable to be incorporated in a badge or similar object. The antenna comprises electrical windings (28, 38) surrounding a flexible antenna core (26, 36). The antenna core (26, 36) is of a material having a high quality factor formed of a plurality of mutually insulated, longitudinally extending chains of magnetic soft material of high .mu.. According to one embodiment, a powder of small particles of a magnetic soft material of high .mu. is mixed with a synthetic resin so that a high saturation of magnetic material in the mixture is formed in a vacuum. The mixture is cured in a strong magnetic field so that the particles form chains (18A, 18B, 18C) of the particle parallel to the applied magnetic field.
REFERENCES:
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patent: 4947179 (1990-08-01), Ganter et al.
patent: 5159347 (1992-10-01), Osterwalder
patent: 5220338 (1993-06-01), Matsushita
patent: 5220339 (1993-06-01), Matsushita
patent: 5408243 (1995-04-01), D'Hont
IBM Technical Disclosure Bulletin, vol. 21, No. 9, Feb. 9, 1979, R. G. Brocko and G. C. Feth, pp. 3567-3568.
Donaldson Richard L.
Kesterson James C.
Le Hoanganh T.
Matsil Ira S.
Texas Instruments Incorporated
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