This study demonstrates the use of a receiving antenna within a material to transmit microwave energy resulting in dielectric heating and ignition in a direct writing process. The wire antennas themselves do not heat, but rather the induced electric field results in dielectric heating of the sample, and with sufficient electric field strength, triggers ignition. With different length of embedded receiving antenna, local hot spots were generated at the ends of the receiving antenna as imaged with an IR camera. Simulation of a monopole source and receiving antennas, shows a spatial correspondence of the calculated electric field and the measured hot spots. We also demonstrate that receiving antennas can be incorporated to trigger ignition at desired locations, with multiple ignition points from which flame propagations can be induced. This study provides a new way to design and remote control the location of the hot spots and ignition.

这项研究演示了在材料内使用接收天线来传输微波能量，从而在直接写入过程中产生介电加热和点燃。线状天线本身不会加热，而是感应电场导致样品电介质加热，并且在足够的电场强度下触发点火。对于不同长度的嵌入式接收天线，通过红外摄像机成像，在接收天线的末端产生了局部热点。单极源和接收天线的仿真显示了计算的电场和测量的热点的空间对应关系。我们还证明，可以合并接收天线以在所需位置触发点火，并具有多个点火点，可以从这些点火点诱导火焰传播。