Communications: radio wave antennas – Antennas – Spiral or helical type
Patent
1998-11-17
2000-03-07
Le, Hoanganh
Communications: radio wave antennas
Antennas
Spiral or helical type
343866, 340572, H01R 136
Patent
active
060346515
ABSTRACT:
An antenna coil with low electrical field emissions comprises a flat winding with a specified shape and a conductive screen facing the winding. The conductive screen has substantially the same shape as the winding, and includes a cut-off zone. The screen neutralizes the parasitic electrical field emitted by the winding without disturbing the useful magnetic field which is axially oriented (i.e., oriented perpendicularly to the plane of the coil). Such an antenna coil is applicable to a station for the transmission-reception of data by inductive coupling.
REFERENCES:
patent: 4451812 (1984-05-01), Vescovi et al.
patent: 5574470 (1996-11-01), De Vall
patent: 5598327 (1997-01-01), Somerville et al.
patent: 5608417 (1997-03-01), De Vall
patent: 5808587 (1998-09-01), Shima
Galanthay Theodore E.
Ho Tan
Le Hoang-anh
STMicroelectronics S.A.
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