| 摘要 |
988,653. Radio refraction and reflection. LIGNES - TELEGRAPHIQUES ET TELEPHONIQUES. June 24, 1963 [June 27, 1962], No. 25076/63. Heading H4A. Relates to a spherical reflector of radio waves employed, e.g. as a marine or an aeronautical beacon, of the type in which the sphere 1 is of dielectric material whose permittivity is a point function of the radius, comprising a concentric spherical zone of reflecting material 2 whose radius is less than that of the sphere. The variation of permittivity with radius may be continuous or the sphere may be formed from layers of materials with differing permittivities. A reflector in which the reflecting material forms a dome on part of the exterior of a dielectric sphere is stated as known and reference is made in the Specification to J. App. Phys., Vol. 25, 1954, pp. 855-859. |
