| 摘要 |
<p>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 0.2μm or more and 4μm 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.</p> |
