Lens of gradient dielectric constant and methods of production

Details Lens of gradient dielectric constant and methods of production Lens of gradient dielectric constant and methods of production

G - Physics

02

B

G02B 3/00 (2006.01) B29C 39/02 (2006.01) B29C 67/04 (2006.01) B29D 11/00 (2006.01) H01Q 15/08 (2006.01)

Patent

CA 2456963

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.

L'invention concerne une lentille comprenant un noyau interne constitué d'un mélange de billes de verre polymérisé ou fondu sensiblement homogène, d'un liant polymérisable ou fusible et, pour augmenter la constante diélectrique, d'un matériau diélectrique à faibles pertes. Le noyau interne possède, de préférence, une constante diélectrique d'environ 2, et un espace interstitiel d'environ 30 à 50 %. La lentille comprend également une couche enveloppe extérieure constituée d'un mélange de billes de verre creuses polymérisé ou fondu sensiblement homogène et d'une résine polymérisable ou fusible. La couche enveloppe extérieure possède, de préférence, une constante diélectrique d'environ 1, et un espace interstitiel d'environ 30 à 50 %. En outre, la lentille comprend des couches intermédiaires possédant une constante diélectrique comprise entre 1 et 2.

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