| 摘要 |
<p>The wall (70) has core layer (72) that is made of dielectric material, and composed of layers (74,76) made of dielectric material. The dielectric constant of dielectric material of core layer is greater than dielectric constant of dielectric material of layers (74,76). Another two layers (78,80) are located towards layer (76) for impedance transformation of dielectric materials whose dielectric constants are selected such that the dielectric constant is progressively decreased starting from core layer towards inside (I) of antenna.</p> |
