In this paper the design of a handheld light applicator for microwave heating is presented. The applicator is made of an array of resonant longitudinal slots cut on a broad wall of a rectangular waveguide, and it is covered by a cylindrical lens made of Plexiglas with a permittivity of 2.53. The geometrical optics approach is used as initial approximation to establish the lens profile. It allows for the shaping of the slotted waveguide’s radiation pattern into a desired output pattern in the transversal plane. Three-dimensional simulation results show that the applicator performance can be improved at 2.45 GHz by using a homogeneous dielectric lens.

中文翻译：

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微波加热用电介质涂抹器的设计

在本文中，介绍了用于微波加热的手持式光施加器的设计。施加器由在矩形波导的宽壁上切割的谐振纵向槽阵列制成，并且覆盖有由有机玻璃制成的柱面透镜，其介电常数为 2.53。几何光学方法用作建立透镜轮廓的初始近似值。它允许将开槽波导的辐射模式成形为横向平面中所需的输出模式。三维仿真结果表明，在 2.45 GHz 频率下使用均质介质透镜可以提高涂抹器性能。