| CPC H01Q 15/08 (2013.01) [B29D 11/00432 (2013.01); B29D 11/00836 (2013.01); G02B 1/10 (2013.01); G02B 3/0087 (2013.01); G02B 2003/0093 (2013.01)] | 10 Claims |
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1. A production method for a Luneburg lens, comprising:
Step 1), bonding a number of first granular materials into a sphere by a bonding agent, so as to obtain a sphere at a first stage, and the sphere at the first stage being called a sphere core;
Step 2), spraying the bonding agent on a surface of the sphere core, and placing the sphere core in a container containing second granular materials before the bonding agent is dried and cured, and rolling the sphere core, so that the surface of the whole sphere core is bonded with the second granular materials;
during the process, supplementing and spraying the bonding agent and continuing rolling the sphere core until the thickness of the second granular materials bonded to the surface of the sphere core reaches a preset range, these second granular materials thus forming a dielectric layer coating the sphere core, the dielectric layer formed by the second granular materials being called a first dielectric layer, and at this time, the sphere at the first stage growing into a sphere at a second stage; and
Step 3), spraying the bonding agent on a surface of the first dielectric layer, placing the sphere at the second stage in a container containing third granular materials before the bonding agent is dried and cured, and rolling the sphere at the second stage, so that the surface of the whole first dielectric layer is bonded with the third granular materials;
during the process, supplementing and spraying the bonding agent as required and continuing rolling the sphere at the second stage core until the thickness of the third granular materials bonded to the surface of the sphere at the second stage reaches a preset range, these third granular materials thus forming another dielectric layer coating the previous dielectric layer, the another dielectric layer being called a second dielectric layer, and at this time, the sphere at the second stage growing into a sphere at a third stage, wherein,
a Luneburg lens with a predetermined number of dielectric layers is prepared, in which dielectric constants of the granular materials used from an innermost sphere core to an outermost dielectric layer follow a law from high to low, and a target value of a dielectric constant of the first granular material is 2, and a target value of a dielectric constant of the granular material used by the outermost dielectric layer is 1.
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