Lens of gradient dielectric constant and methods of production

本发明公开了一种梯度介电常数透镜以及其制造方法。该透镜包括内核，该内核包括玻璃球、可固化或可熔化的粘结剂和所需要来增加介电常数的低损耗介电材料的经过固化或熔化的基本上均质的混合物。该内核具有约为2.0的介电常数，以及从大约30％到大约50％的间隙空隙体积(代表在经过固化或熔化的材料单元之间被封闭的气体空间)。该透镜还包括外壳层，该外壳层包括中空玻璃球和可固化或可熔化的树脂的经过固化或熔化的基本上均质的混合物。优选地，该外壳层具有大约为1.0的介电常数，以及从大约30％到大约50％的间隙空隙体积。此外，该透镜包括最少一个中间层，优选地包括两个或多个中间层，该中间层具有落入1和2之间的介电常数。该中间层包括玻璃球、树脂和所需要来增加介电常数的低损耗介电材料的经过固化的基本上均质的混合物。就如内核和外壳层的情形那样，该中间层具有从大约30％到大约50％的间隙空隙体积。本发明还公开了用于制造上面所述类型的透镜的制造方法。 Disclosed is a lens of gradient dielectric constant and methods for the production of same. The lens includes an inner core comprising a cured or fused substantially homogenous blend of glass spheres, curable or fusible binder and, as needed to increase dielectric constant, a low-loss dielectric material. The inner core preferably has a dielectric constant of about 2.0, and an interstitial void volume (representing trapped air space between elements of the cured or fused material) of from about 30% to about 50%. The lens also includes an outer shell layer comprising a cured or fused substantially homogenous blend of hollow glass spheres and curable or fusible resin. The outer shell layer preferably has a dielectric constant of about 1.0, and an interstitial void volume of from about 30% to about 50%. In addition, the lens includes a minimum of one, and preferably two or more intermediate layers, the intermediate layers having a dielectric constant falling between 1 and 2. The intermediate layers are comprised of a cured substantially homogenous blend of glass spheres, resin and, as needed to increase dielectric constant, a low-loss dielectric material. As is the case with the inner core and outer shell layers, the intermediate layer(s) have an interstitial void volume of from about 30% to about 50%. Also disclosed are methods of production for lenses of the type described above.