Evaluation of Polylactic Acid Polymer as a Substrate in Rectenna for Ambient Radiofrequency Energy Harvesting

IF 1.6 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Low Power Electronics and Applications Pub Date : 2023-05-12 DOI:10.3390/jlpea13020034

Pangsui Usifu Linge, Tony Gerges, P. Bevilacqua, J. Duchamp, P. Benech, J. Verdier, P. Lombard, Michel Cabrera, P. Tsafack, F. Mieyeville, Bruno Allard

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Abstract

This work details the design and experimental characterization of a 2D rectenna for scavenging radio frequency energy at 2.45 GHz (WiFi band), fabricated on polylactic acid polymer (PLA) using a plastronics approach. PLA is the RF substrate of both antenna and rectifier. The two transmission line (TTL) approach is used to characterize the substrate properties to be considered during design. A linearly polarized patch antenna with microstrip transmission feeding is connected to a single series diode rectifier through a T-matching network. The antenna has simulated and measured gain of 7.6 dB and 7.5 dB, respectively. The rectifier has a measured DC output power of 0.96 μW at an optimal load of 2 kΩ under RF input power of −20 dBm at 2.45 GHz. The power conversion efficiency is 9.6% in the latter conditions for a 54 × 36 mm patch antenna of a 1.5 mm thick PLA substrate obtained from additive manufacturing. The power conversion efficiency reaches a value of 28.75% when the input power is −10 dBm at 2.45 GHz. This corresponds to a peak DC power of 28.75 μW when the optimal load is 1.5 kΩ. The results compare significantly with the ones of a similar rectenna circuit manufactured on preferred RF substrate.

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聚乳酸聚合物作为Rectenna环境射频能量采集基质的评价

本工作详细介绍了使用塑性学方法在聚乳酸聚合物（PLA）上制备的用于清除2.45GHz（WiFi波段）射频能量的二维矩形天线的设计和实验表征。PLA是天线和整流器的射频基板。双传输线（TTL）方法用于表征设计过程中要考虑的衬底特性。微带传输馈电的线性极化贴片天线通过T匹配网络连接到单个串联二极管整流器。该天线的模拟和测量增益分别为7.6dB和7.5dB。整流器在2.45 GHz的−20 dBm射频输入功率下，在2 kΩ的最佳负载下，测量到的直流输出功率为0.96μW。在后一种条件下，由增材制造获得的1.5mm厚PLA衬底的54×36mm贴片天线的功率转换效率为9.6%。当2.45 GHz的输入功率为−10 dBm时，功率转换效率达到28.75%。当最佳负载为1.5 kΩ时，这对应于28.75μW的峰值直流功率。该结果与在优选RF基板上制造的类似矩形天线电路的结果进行了显著比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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