3D Receptive ultrathin LF band antenna

Author

Sato, K. ; Sano, K.

Author_Institution

R&D Div., TOKO Inc., Tsurugashima, Japan

fYear

2014

fDate

7-10 Oct. 2014

Firstpage

422

Lastpage

425

Abstract

The 3D receptive LF band antenna used in vehicle smart key system is realized with ultrathin thickness of 0.32 mm. The antenna consists of three planar coils having a magnetic core of sheet type. For 3D reception, the magnetic axis representing the direction of maximum sensitivity of each coil should be orthogonal with one another. In this paper, a novel technique is introduced to realize that. The coil is made by inserting the thin magnetic core into the center hole of the flat winding wire, and contacting them closely. With this unique structure, the magnetic axis of each coil inclines to the horizontal plane and the inclined angle is adjusted to 35.3°. The antenna structured by placing the coils in rotational symmetry with angles of 120° in the same plane has three orthogonal magnetic axes.

Keywords

antennas; automotive electronics; coils; keys (locking); magnetic cores; 3D receptive antenna; orthogonal magnetic axis; planar coils; size 0.32 nm; thin magnetic core; ultrathin LF band antenna; vehicle smart key system; Antennas; Coils; Magnetic cores; Magnetic fields; Sensitivity; Three-dimensional displays; Vehicles; keyless entry; receiving antennas; smart key; vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics (GCCE), 2014 IEEE 3rd Global Conference on

Conference_Location

Tokyo

Type

conf

DOI

10.1109/GCCE.2014.7031115

Filename

7031115