| 摘要 |
<p>A radio frequency antenna (20) for use with a radio device (11) embedded in a tire for operation in a frequency range of at least 130 MHz, comprises an antenna body, and an insulating coating (22) surrounding the antenna body , the insulating coating having a dielectric constant less than a dielectric constant of the rubber material, and preferably less than 3, and having a thickness of at least 0.2 mm. The coating material preferably has a surface resistivity of at least 1014 ohms/sq and a volume resistivity of at least 1011 ohms*cm. In addition, the coating material preferably has a dissipation factor less than 0.03. The antenna body is preferably a wire formed of spring steel, brass coated spring steel, or spring brass.</p> |
