US 11,949,156 B2
Long range low frequency antenna
Jose Ramon Fernandez De La Fuente, Atarfe (ES); Claudio Canete Cabeza, Benalmadena (ES); Antonio Rojas Cuevas, Malaga (ES); and Francisco Ezequiel Navarro Perez, Barcelona (ES)
Assigned to PREMO, S.L., Campanillas (ES)
Filed by PREMO, S.A., Campanillas (ES)
Filed on May 12, 2021, as Appl. No. 17/318,439.
Claims priority of application No. 20382441 (EP), filed on May 26, 2020.
Prior Publication US 2021/0376476 A1, Dec. 2, 2021
Int. Cl. H01Q 11/04 (2006.01); H01F 3/00 (2006.01); H01F 27/02 (2006.01); H01F 27/30 (2006.01); H01Q 1/32 (2006.01); H01Q 7/06 (2006.01); H01Q 7/08 (2006.01); H01Q 11/08 (2006.01)
CPC H01Q 11/04 (2013.01) [H01F 27/022 (2013.01); H01F 27/306 (2013.01); H01Q 1/3241 (2013.01); H01Q 7/06 (2013.01); H01Q 7/08 (2013.01); H01Q 11/08 (2013.01); H01F 2003/005 (2013.01); Y10T 428/32 (2015.01)] 15 Claims
OG exemplary drawing
 
1. A long range low frequency antenna, comprising:
an elongated magnetic core;
a coil surrounding the elongated magnetic core;
a bobbin;
the elongated magnetic core introduced in a cavity of the bobbin;
a housing overmolded on the bobbin in a waterproof manner;
at least one damper located at one extreme of the elongated magnetic core, the at least one damper made of an elastic and thermally-stable compound comprising a resin and a first filler including a natural mineral filler, whereby longitudinal dilatations, shrinkage, mechanical shocks, and vibrations of the elongated magnetic core are absorbed by the at least one damper, avoiding an impact over an inductance variation of the coil.