Abstract. Our paper presents the design, fabrication, and characterization of metamaterial absorber-based microwave imaging detector that is operating in industrial, scientific, and medical (ISM) band. The results reveal that the structure has almost perfect absorption at 2.39 GHz in the simulation and 2.51 GHz in the experimental measurement. For energy-harvesting applications, Schottky diodes have been used and 11.8-mV dc voltage across a Schottky diode has been observed with 84.2% dc conversion efficiency in harvesting application. To show the different incident angle imaging, MATS-1000 antenna training kit is used, and different imaging pictures are given, which are obtained by MATLAB with the help of a microcontroller card. Both experimental and simulation study results verify that the microwave detector generates accurate images with negligible distortions. The innovative side of this study when it is compared with similar studies can be sorted as having more dc obtained voltage, incident angle characterization, and operation frequency. Simulated and measurement results show that the proposed structure can effectively be used in the imaging at ISM frequency band, which is the most common frequency band in wireless appliances.

中文翻译：

---

基于超材料吸收体的微波功率成像探测器

摘要。我们的论文介绍了在工业、科学和医疗 (ISM) 波段运行的基于超材料吸收体的微波成像探测器的设计、制造和表征。结果表明，该结构在模拟中的 2.39 GHz 和实验测量中的 2.51 GHz 处具有几乎完美的吸收。对于能量收集应用，已使用肖特基二极管，并且在收集应用中观察到肖特基二极管两端的 11.8mV 直流电压具有 84.2% 的直流转换效率。为了展示不同的入射角成像，使用了MATS-1000天线训练套件，给出了不同的成像图片，这些图片是由MATLAB在微控制器卡的帮助下获得的。实验和模拟研究结果都证实了微波探测器生成的图像准确，失真可忽略不计。与类似研究相比，这项研究的创新之处可以归结为具有更多的直流电压、入射角特性和工作频率。仿真和测量结果表明，所提出的结构可以有效地用于ISM频段的成像，ISM频段是无线设备中最常见的频段。