| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an antenna which has surfaces where ice and snow are hard to attach, can maintain this surface property for a long time period and furthermore can prevent the communication faults due to the surface property by microscopically dividing the surface of an antenna material into a hydrophilic exposed part, where the photocatalystic oxide particles touch the outside air and a water repellent exposed part where the water repellent resin touches the outer air respectively. SOLUTION: The surface of this antenna material is microscopically divided into hydrophilic exposed parts where a photocatalystic titanium oxide touches the outside air and a water repellent exposed part where the water repellent fluororesin touches the outside air. At the same time, a surface layer having a >=90 deg. contact angle is formed on the surface of the antenna material. Thus, a hydrophilically attached matter having affinity with the hydrophilic surface part does not have affinity with its adjacent water repellent surface parts. On the contrary, a hydrophilically attached matter, having affinity with the water repellent surface does not have affinity with its adjacent hydrophilic parts. Thus, both hydrophilic and hydrophobic attached matters never stick on the surface of the antenna material.</p> |
