ANTENNA SUBSTRATE

Japanese Patent JP2015053564

A

PROBLEM TO BE SOLVED: To provide an antenna substrate excellent in transmission characteristics of a high frequency signal and also capable of sufficiently securing bondability between a dielectric layer and an antenna element layer.SOLUTION: The present invention relates to an antenna substrate having flexibility. The antenna substrate includes a dielectric layer mainly containing a fluororesin, and an antenna element layer laminated on at least one surface of the dielectric layer. Ten-point average roughness (Rz) of at least one surface in the antenna element layer is 0.2 μm or more and 4 μm or less. The fluororesin preferably has a dielectric constant (εr) of 3 or less and a dielectric tangent (tanδ) of 0.004 or less. The dielectric layer preferably has a flexural strength after an exposure test of 20 GPa or more. The dielectric layer preferably has a light transmittance of 70% or more. The dielectric layer preferably has a light transmittance after the exposure test of 70% or more. The number of times of bending in a bending resistance test is preferably 400 times or more. The number of times of folding before disconnection in a folding resistance test is preferably 400 times or more.

JP4512231	Dipole antenna for tire tags
JP4611783	Wideband antenna device

KOCHI MASAHIKO

JP2013184517A

March 19, 2015

September 05, 2013

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SUMITOMO ELEC PRINTED CIRCUITS

H01Q1/40; B32B7/04; B32B27/30

JP2007143003A	2007-06-07
JP2013089812A	2013-05-13
JP2012052064A	2012-03-15
JP2007142895A	2007-06-07

WO2012161162A1	2012-11-29
WO2006062138A1	2006-06-15

Kazuki Amano
Yoshinori Ikeda
Hiroo Ogawa
Koji Ishida
Koju Kagami
Yoshiaki Negi
Kazuya Kawabata
Takashi Shiotani
Ken-ichi Fujinaka

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