In this work, a device capable of acting as a multiplexer (MUX) and demultiplexer (DEMUX) for electromagnetic waves in gigahertz range is designed and modeled numerically. The device is based on optimized dielectric periodic structures. It can combine signals of different central frequencies injected at its input ports to a single output port, thus acting as a MUX. Reciprocally, the device can separate mixed signals of different frequencies to specific output ports, acting as a DEMUX. To this aim, specific imperfections are introduced into the periodic structure. The design and analysis of the device are performed using the finite-difference time-domain method (FDTD). Transfer functions between pairs of input and output ports are calculated and used to define the design metrics

中文翻译：

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一种用作电磁信号复用器或解复用器的多带隙周期性结构器件


在这项工作中，设计了一种能够充当千兆赫范围电磁波多路复用器 (MUX) 和解复用器 (DEMUX) 的设备并进行了数值建模。该器件基于优化的介电周期性结构。它可以将在其输入端口注入的不同中心频率的信号组合到单个输出端口，从而充当多路复用器。相反，该设备可以将不同频率的混合信号分离到特定的输出端口，充当 DEMUX。为此，在周期结构中引入了特定的缺陷。该器件的设计和分析采用时域有限差分法（FDTD）进行。计算输入和输出端口对之间的传递函数并用于定义设计指标